Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T528491
Explosion-proof scraper discharge centrifuge
Published on July 22, 1991
Published by the Ministry of Machinery and Electronics Industry of the People's Republic of China
Implemented on July 1, 1992
Mechanical Industry Standard of the People's Republic of China
Explosion-proof scraper discharge centrifuge
Subject content and scope of application
JB/T5284-91
This standard specifies the model, basic parameters, technical requirements, test methods, inspection rules and packaging, storage and transportation requirements of explosion-proof scraper discharge centrifuge.
This standard applies to explosion-proof scraper discharge centrifuges with explosion-proof grades of u1AT2. 2 Reference standards
GB1223
GB2100
GB3077
GB3280
GB4237
GB5676
GB5677
GB7779
GB9439
GB10901
GB10895
GB10894
ZBJ77002
JB2759
Steel pressure vessels
Packaging, storage and transportation pictorial symbols
Technical conditions for high-quality carbon structural steel
Stainless steel welding rods
Test method for intergranular corrosion tendency of stainless acid-resistant steel Technical conditions for stainless acid-resistant steel castings
Technical conditions for alloy structural steel Parts
Stainless steel cold-rolled steel plate
General requirements for explosion-proof electrical equipment for explosive atmospheres Flameproof electrical equipment "d"
Explosion-proof electrical equipment for explosive atmospheres
Stainless steel hot-rolled steel plate
Casting carbon steel for general engineering
Radiographic and film grade classification method for steel castings Method for compiling centrifuge models
Gray cast iron parts
Method for testing performance of centrifuges
Method for testing mechanical vibration of centrifuges and separators Determination of sound power level of separation machinery noise Engineering method Technical specifications for conventional non-destructive testing of forged and welded parts of centrifuges and separators Product label
Table General technical conditions
Electromechanical product packaging
Model and basic parameters
3.1 The model of explosion-proof scraper discharge centrifuge shall comply with the provisions of GB7779. 3.2 The basic parameters of explosion-proof scraper discharge centrifuge (as shown in the figure) shall comply with the provisions of Table 1. Approved by the Ministry of Machinery and Electronics Industry on July 22, 1991 and implemented on July 1, 1992
GKF-800
GKF-1000
GKF-1250
GKF-1500
Technical requirements
Diameter D
JB/T528491
Length L
Volume V
Speed #
12501900| |tt||1000~1500
800~1220
630~950
Separation factor
700~1600
550~1250
430~1000
350800
4.1 The structure of the centrifuge should meet the explosion-proof requirements of d1AT2 and comply with the requirements of this standard, and be manufactured in accordance with the product technical documents approved by the prescribed procedures.
4.2 The materials used in the centrifuge should have a product quality inspection certificate from the supplier, otherwise the manufacturer should inspect the materials according to relevant standards and use them only after they are qualified.
4.3 Materials for the main parts of the centrifuge:
4.3.1 High-quality carbon steel should comply with the provisions of GB699. 4.3.2 Stainless steel plates should comply with the provisions of GB3280 and GB4237. 4.3.3 Alloy structural steel shall comply with the provisions of GB3077. 4.4 The substitution of parts materials shall be approved by the design department. 4.5 The casting and acceptance of castings shall comply with the provisions of GB2100, GB5676 and GB9439. 4.6 Drum welding shall be undertaken by welders who have passed the examination of the labor department. 4.7 Drum welding shall comply with the provisions of GB983 and GB150. After welding, internal stress elimination and intergranular corrosion prevention treatment shall be carried out. The stainless steel welding specimens of each batch of drums shall be subjected to intergranular corrosion test. The test shall be carried out and evaluated according to the "T" method of GB1223, and there shall be no tendency of intergranular corrosion. If the drum body is made of titanium-containing, sawn or ultra-low carbon stainless steel, intergranular corrosion prevention treatment may not be carried out after welding, but intergranular corrosion test shall be carried out. The mechanical property test of the welding specimen shall comply with the relevant provisions in GB150, and its mechanical properties shall not be lower than the provisions of the corresponding standards for the parent material. 4.8 The drum welds shall be inspected by X-ray flaw detection according to the provisions of ZBJ77002. The radiographic quality shall not be lower than AB grade. The weld quality: the longitudinal weld shall reach the second grade standard, and the circumferential weld shall reach the third grade standard. The inspection length of the longitudinal weld is 100%, and the inspection length of the circumferential weld is 20%. If it exceeds the standard, it shall be increased by 20%. If it exceeds the standard again, it shall be inspected 100%. For defective welds, they shall be scraped off and re-welded before inspection. 4.9 After the drum chassis is roughly processed, it shall be inspected by "cross" X-ray flaw detection according to the provisions of GB5677 second grade standard. 4.10 Welding parts should be free of welding slag and spatter, and there should be no obvious defects such as pores, cracks, burn-through, slag inclusions and incomplete penetration. 4.11 Important cast steel (iron) parts or welded structural parts such as machine base, housing, valve body, cylinder body, etc. should be evenly subjected to stress relief heat treatment (solution treatment should be performed on stainless steel castings).
4.12 The spindle should be inspected and accepted for non-destructive damage in accordance with the provisions of ZBJ77002. Explosion-proof electrical equipment should comply with the provisions of GB3836.1~3836.2 and be accepted according to the corresponding explosion-proof level. 4.13
Explosion-proof electro-hydraulic sliding valves can be designed and manufactured by the manufacturer, but they should be used only after being inspected and qualified by the relevant explosion-proof department. 4.14
Explosion-proof electro-hydraulic sliding valves should have explosion-proof level certification. 6 The gap, length and surface roughness of each explosion-proof joint surface of the solenoid valve should comply with the provisions of GB3836.2. 4.16
4.17 The exhaust port, inlet and outlet, liquid discharge port, etc. should be flexibly connected to the process system and no air should enter. 4.18 The maximum allowable oxygen content (%) when no explosion occurs in the main engine should be specified according to the selected inert gas medium and its dosage, and the inert protective gas pipeline filled into the main engine should be unobstructed. 4.19 When the main engine is filled with inert gas and its pressure P<0.025MPa, an alarm signal should be issued or the machine should be automatically stopped. 4.20 The drum should be subjected to a dynamic balancing test, and the allowable residual imbalance should be determined according to Appendix A (Supplement). Adjust on the specified correction plane, and the total correction weight should be less than 1/1500 of the drum weight. After counterweighting, a verification test should be carried out. 4-21
The drum speed should not be less than 97% of the rated value. The current of the main motor during the no-load test should not be greater than 70% of the rated current. The operating current and temperature rise of the load test should be lower than the rated value. 4.22
4.23 All exposed moving parts of the centrifuge should be covered with protective covers. 4.24
The centrifuge should have safety protection devices and anti-static triangular tape should be used. 4.25
The electric control equipment of the centrifuge is installed in an operating room isolated from the site, which should be suitable for the use environment requirements and have safety protection measures. 4.26 The radial distance between the scraper blade and the screen (or filter cloth) pressure plate is 410mm; the axial clearance between the scraper and the bottom of the drum and the liquid blocking plate is 5~8mm.
The centrifuge should use vibration isolation devices and braking devices. 4.28 Under working pressure, the leakage of the hydraulic system should not exceed the specified value, and the oil temperature should be lower than 50℃. When the centrifuge is running at rated speed, the vibration intensity level should not exceed 7.]. 4.29
During empty (negative) test, the main engine noise (sound pressure level) should not exceed 9OdB(A). 4.303
4.31 The main bearing is well lubricated. At the end of the empty test, the temperature should not exceed 65℃, and the temperature rise should not exceed 30℃; at the end of the load test, the temperature should not exceed 70℃, and the temperature rise should not exceed 35℃.
4.32 The sealing of the whole machine and the mating surfaces of related adjacent parts and components should ensure that the sealing device works well. 4.33 When assembling mechanical seals or labyrinth seals, there should be no scratch damage on the sealing surface. 4.34 The empty (load) operation test of the centrifuge should be carried out according to the designed working cycle program and time, first manually controlled, and then automatically controlled by the program. The continuous empty test time of the whole machine should be no less than 4h; the continuous load test time of the whole machine is 6h. 4.35 Each cylinder should be subjected to a water pressure strength test. The test pressure is 1.5 times the maximum working pressure. The workpiece is kept at the test pressure for 5min and then reduced to the working pressure. There should be no leakage. 4.36 After the machine base and door cover are assembled, the test pressure is 0.05MPa pressure for air tightness test, the pressure should be maintained for no less than 30min, no leakage. 4.37 The production capacity and separation effect of the centrifuge should meet the design requirements. 4.38 Under normal use, the average trouble-free working time of the centrifuge should be no less than 4000h. 4.39 The surface roughness R of the matching surface between the drum and the main shaft is 1.6um. The matching surface should fit evenly, with a fitting rate of no less than 65% on the entire length and circumference of the generatrix, and a fitting rate of no less than 70% on the inner circumference of the axial 1/4 length of the large end, or no less than 5 contact spots within an area of 25mm×25mm.
4.40 The surface roughness R of the journal at the main shaft bearing is 0.8um. 4.41 The surface roughness R of the working surface of the cylinder is 0.8um; and there should be no defects such as knife marks and scratches. 4.42 The coaxiality of the two journals at the main shaft bearing installation is grade 6 accuracy; the coaxiality of the main shaft section matched with the drum relative to the journal (bearing installation) is grade 6 accuracy.
4.43 The radial runout and end face runout of the outer end of the drum after assembly should not be greater than 0.0003D (D is the inner diameter of the drum). 4.44 The non-machined outer surface should be painted with corrosion-resistant primer and corrosion-resistant topcoat, and the non-machined inner surface should be painted with corrosion-resistant primer. The paint layer should comply with the provisions of relevant standards. The surface of oxidized parts and stainless steel parts shall not be painted. Test method
5.1 The test of explosion-proof electrical equipment designed and manufactured by the manufacturer in explosive gas mixture shall be carried out in accordance with GB3836.1~3836.2.
5.2 The solenoid valve housing shall be tested in accordance with GB3836.2 and shall have a material test report and a water pressure test report. 5.3 The vibration intensity of the centrifuge shall be tested in accordance with GB10895. 5.4 The noise test of the centrifuge shall be carried out in accordance with GB10894. The performance test of the centrifuge shall comply with GB10901. 5.57
5.6 The idle running test shall be carried out on the test bench. Inspection rules
The centrifuge shall be inspected and qualified by the quality inspection department of the manufacturer and accompanied by a product quality certificate before it can leave the factory. 6.1
6.2 The centrifuge shall undergo factory inspection and type inspection, and its test items shall be carried out in accordance with the provisions of Table 2. Table 2
Idle running test
Load running test
Separation performance test
Note△- indicates that the test should be carried out;
○- indicates that the test should be carried out as needed,
X- indicates that the test is not carried out.
Start-up test
Adjustment test
Stop test
Vibration measurement test
Noise measurement test
Operation test
Vibration measurement test
Noise measurement test
Inspection category
6.3 Factory inspection
6.3.1 When the centrifuge is empty for testing, each unit shall be inspected for delivery. For batch production, the process and product quality of the product are stable, two units shall be sampled for inspection. If the first sampling fails, double sampling shall be conducted. If the double sampling still fails, each unit shall be inspected. 6.3.2 Before the test, the following documents should be checked:
Main parts material certificate or inspection report; Mechanical properties test report of each batch of drum welding samples; Drum weld and spindle flaw detection inspection report; Drum dynamic balance inspection report;
Intergranular corrosion test report of stainless steel welded parts. 6.4 One of the following products should be subject to type inspection: 4
JB/T5284-91
New product first prototype;
b. For mass-produced products, when there are major changes in design or process that affect product performance, type inspection should be carried out and explosion-proof level identification should be re-performed.
6.5 The appearance quality and protective devices of the centrifuge should be inspected and should comply with the provisions of Articles 4.10, 4.23, 4.24, 4.27 and 4.44 of this standard. 6.6 The determination of the drum speed should comply with the provisions of Article 4.21. 6.7
The determination of the temperature rise of the main bearing shall comply with the provisions of Article 4.31. The determination of the oil temperature of the hydraulic system shall comply with the provisions of Article 4.28. The determination of the operating current and temperature rise of the main motor shall comply with the provisions of Article 4.22. 6.10
The determination of the vibration severity level of the centrifuge shall comply with the provisions of Article 4.29. The determination of the noise of the centrifuge shall comply with the provisions of Article 4.30. The empty (loaded) running test time after assembly shall comply with the provisions of Article 4.34. The determination of the sealing performance of the casing shall comply with the provisions of Article 4.36. Marking, packaging, transportation, storage
Fix a metal nameplate that complies with the provisions of JB8 in a conspicuous position of the centrifuge. The nameplate content is: 7.11
Product model and name;
Main technical parameters:
Drum diameter, mm;
Drum length, mm;
Drum speed, r/min;
Separation factor;
Drum volume, L;
Main motor power, kW;
Maximum loading amount of allowed separation materials, kg; Centrifuge weight, kg;
Overall dimensions (length × width × height), mm; Factory number;
Manufacture date;
Manufacturer name.
A sign indicating the direction of drum rotation should be marked on a conspicuous part of the centrifuge body. The outer marking of the packaging box should comply with the provisions of GB191. 7.1.3
7.2 Packaging
The packaging of the centrifuge should comply with the provisions of JB2759. 7.2.1
The following documents should be attached to the packing box:
Packing list;
Product certificate;
Product instruction manual (including installation drawings); List of random equipment and accessories.
7.3 Transportation
7.3.1 The centrifuge should be firmly fixed in the box and should not be inverted during the shipping process. 7.3.2 Random spare parts, spare parts and special tools should be fixed in the box and should not roll to avoid loss and damage during transportation. 7.4 Storage
7.4.1 The centrifuge should be stored in a sheltered place with a relative humidity not exceeding 80%, a temperature below 35°C, no corrosive media. 5
JB/T5284--91
Appendix A
Allowable residual unbalance of centrifuge parts and components for dynamic balancing (supplement)
The allowable residual unbalance of centrifuge parts and components for dynamic balancing is calculated according to formula (A1): M
Where: M—allowable residual unbalance, g.cm; G—
Weight of part (or component), kg;
Allowable eccentricity of center of gravity of part (or component), m. The allowable eccentricity of center of gravity is calculated according to formula (A2): Ge
Where: A—dynamic balancing accuracy, take 6.3mm/s; angular velocity of rotation of part (or component), 1/s. Figure A1
·(A1)
（A2）
The M value calculated by formula (A1) is the total allowable residual unbalance at the center of gravity of the zero component. The allowable residual unbalance on the two correction planes (see Figure A1) is calculated according to formula (A3) and formula (A4): M,-
·(A4)
In the formula: M,
JB/T5284-91
The allowable residual unbalance on correction plane I (see Figure A1), 8.cm; M——The allowable residual unbalance on correction plane I (see Figure A1), g.cm; M-zero, the allowable residual unbalance of the component, 8.cm; a zero, the distance from the center of gravity of the component to correction plane 1, mm; b zero, the distance from the center of gravity of the component to correction plane 1, mm. Note: Correction planes 1 and 1 should be selected to not affect the strength and working performance of the balancing part and be as far away from each other as possible. Additional Notes:
This standard was proposed and managed by the National Technical Committee for Separation Machinery Standardization. This standard was drafted by the Machinery Factory of Jilin Chemical Industry Company. The main drafter of this standard is Yue Simin.
People's Republic of China
Mechanical Industry Standard
Explosion-proof Scraper Discharge Centrifuge
JB/T5284-91
Published and distributed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (PO Box 8144, Beijing 100081)
Copyright reserved. No reproduction allowed
Printed by Printing Factory, Qinghe County, Hebei Province
Format 880×1230
Print Sheet 3/4 Number of words 14000
First edition in August 1991
First printing in August 1991
Number of prints 00.0011000 Price 1.20 yuan
No. 00296um. The mating surface should be evenly fitted, with a fitting rate of not less than 65% over the entire length and circumference of the busbar, and a fitting rate of not less than 70% on the inner circumference of the axial 1/4 length of the large end, or at least 5 contact spots within an area of 25mm×25mm.
4.40 The surface roughness R of the journal at the spindle bearing is 0.8um. 4.41 The surface roughness R of the working surface of the oil cylinder is 0.8um; and there should be no defects such as knife marks and scratches. 4.42 The coaxiality of the two journals at the spindle bearing is grade 6 accuracy; the coaxiality of the spindle section matching the drum relative to the journal (bearing installation) is grade 6 accuracy.
4.43 The radial runout and end face runout of the outer end of the drum after assembly should not be greater than 0.0003D (D is the inner diameter of the drum). 4.44 The non-machined outer surface shall be coated with corrosion-resistant primer and corrosion-resistant topcoat, and the non-machined inner surface shall be coated with corrosion-resistant primer. The paint layer shall comply with the provisions of relevant standards. Surface oxidation parts and stainless steel parts shall not be painted. Test method
5.1 The test of explosion-proof electrical equipment designed and manufactured by the manufacturer in explosive gas mixture shall be carried out in accordance with GB3836.1~3836.2.
5.2 The shell of the solenoid valve shall be tested in accordance with GB3836.2, and there shall be a material test report and a water pressure test report. 5.3 The vibration intensity of the centrifuge shall be tested in accordance with GB10895. 5.4 The noise test of the centrifuge shall be carried out in accordance with GB10894. The performance test of the centrifuge shall comply with GB10901. 5.57
5.6 The idle running test shall be carried out on the test bench. Inspection rules
The centrifuge shall be inspected and qualified by the quality inspection department of the manufacturer and accompanied by a product quality certificate before it can leave the factory. 6.1
6.2 The centrifuge shall be subjected to factory inspection and type inspection, and the test items shall be carried out in accordance with the provisions of Table 2. Table 2
Idle running test
Loaded running test
Separation performance test
Note△-indicates that the test shall be carried out;
○-indicates that the test shall be carried out as required;
X-indicates that the test shall not be carried out.
Start-up test
Adjustment test
Stop test
Vibration measurement test
Noise measurement test
Operation test
Vibration measurement test
Noise measurement test
Inspection category
6.3 Factory inspection
6.3.1 When the centrifuge is tested empty, each unit shall be subjected to factory inspection. For products in batch production, whose process and product quality are stable, two units should be sampled for inspection. If the first sampling fails, double sampling shall be conducted. If the double sampling still fails, each unit shall be inspected. 6.3.2 The following documents shall be checked before the test:
Main parts material certificate or inspection report; Mechanical property test report of each batch of drum welding specimens; Flaw detection inspection report of drum weld and main shaft; Drum dynamic balance inspection report;
Intergranular corrosion test report of stainless steel welded parts. 6.4 One of the following products shall be subject to type inspection: 4
JB/T5284—91
First prototype of new product;
b. For batch production products, when there are major changes in design or process that affect product performance, type inspection shall be carried out and explosion-proof level identification shall be re-performed.
6.5 The inspection of the appearance quality and protective devices of the centrifuge shall comply with the provisions of Articles 4.10, 4.23, 4.24, 4.27 and 4.44 of this standard. 6.6 The measurement of the rotation speed of the drum shall comply with the provisions of Article 4.21. 6.7
The measurement of the temperature rise of the main bearing shall comply with the provisions of Article 4.31. The measurement of the oil temperature of the hydraulic system shall comply with the provisions of Article 4.28. The measurement of the operating current and temperature rise of the main motor shall comply with the provisions of Article 4.22. 6.10
The measurement of the vibration severity level of the centrifuge shall comply with the provisions of Article 4.29. The measurement of the noise of the centrifuge shall comply with the provisions of Article 4.30. The empty (load) running test time after assembly shall comply with the provisions of Article 4.34. The measurement of the sealing performance of the casing shall comply with the provisions of Article 4.36. Marking, packaging, transportation, storage
Fix a metal nameplate that complies with the provisions of JB8 in a conspicuous position of the centrifuge. The nameplate content is: 7.11
Product model and name;
Main technical parameters:
Drum diameter, mm;
Drum length, mm;
Drum speed, r/min;
Separation factor;
Drum volume, L;
Main motor power, kW;
Maximum loading amount of allowed separation materials, kg; Centrifuge weight, kg;
Overall dimensions (length × width × height), mm; Factory number;
Manufacture date;
Manufacturer name.
A sign indicating the direction of drum rotation should be marked on a conspicuous part of the centrifuge body. The outer marking of the packaging box should comply with the provisions of GB191. 7.1.3
7.2 Packaging
The packaging of the centrifuge should comply with the provisions of JB2759. 7.2.1
The following documents should be attached to the packing box:
Packing list;
Product certificate;
Product instruction manual (including installation drawings); List of random equipment and accessories.
7.3 Transportation
7.3.1 The centrifuge should be firmly fixed in the box and should not be inverted during the shipping process. 7.3.2 Random spare parts, spare parts and special tools should be fixed in the box and should not roll to avoid loss and damage during transportation. 7.4 Storage
7.4.1 The centrifuge should be stored in a sheltered place with a relative humidity not exceeding 80%, a temperature below 35°C, no corrosive media. 5
JB/T5284--91
Appendix A
Allowable residual unbalance of centrifuge parts and components for dynamic balancing (supplement)
The allowable residual unbalance of centrifuge parts and components for dynamic balancing is calculated according to formula (A1): M
Where: M—allowable residual unbalance, g.cm; G—wwW.bzxz.Net
Weight of part (or component), kg;
Allowable eccentricity of center of gravity of part (or component), m. The allowable eccentricity of center of gravity is calculated according to formula (A2): Ge
Where: A—dynamic balancing accuracy, take 6.3mm/s; angular velocity of rotation of part (or component), 1/s. Figure A1
·(A1)
（A2）
The M value calculated by formula (A1) is the total allowable residual unbalance at the center of gravity of the zero component. The allowable residual unbalance on the two correction planes (see Figure A1) is calculated according to formula (A3) and formula (A4): M,-
·(A4)
In the formula: M,
JB/T5284-91
The allowable residual unbalance on correction plane I (see Figure A1), 8.cm; M——The allowable residual unbalance on correction plane I (see Figure A1), g.cm; M-zero, the allowable residual unbalance of the component, 8.cm; a zero, the distance from the center of gravity of the component to correction plane 1, mm; b zero, the distance from the center of gravity of the component to correction plane 1, mm. Note: Correction planes 1 and 1 should be selected to not affect the strength and working performance of the balancing part and be as far away from each other as possible. Additional Notes:
This standard was proposed and managed by the National Technical Committee for Separation Machinery Standardization. This standard was drafted by the Machinery Factory of Jilin Chemical Industry Company. The main drafter of this standard is Yue Simin.
People's Republic of China
Mechanical Industry Standard
Explosion-proof Scraper Discharge Centrifuge
JB/T5284-91
Published and distributed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (PO Box 8144, Beijing 100081)
Copyright reserved. No reproduction allowed
Printed by Printing Factory, Qinghe County, Hebei Province
Format 880×1230
Print Sheet 3/4 Number of words 14000
First edition in August 1991
First printing in August 1991
Number of prints 00.0011000 Price 1.20 yuan
No. 00296um. The mating surface should fit evenly, with a fit rate of not less than 65% over the entire length and circumference of the generatrix, and a fit rate of not less than 70% on the inner circumference of the axial 1/4 length of the large end, or at least 5 contact spots within an area of 25mm×25mm.
4.40 The surface roughness R of the journal at the spindle bearing is 0.8um. 4.41 The surface roughness R of the working surface of the oil cylinder is 0.8um; and there should be no defects such as knife marks and scratches. 4.42 The coaxiality of the two journals at the spindle bearing is grade 6 accuracy; the coaxiality of the spindle section matching the drum relative to the journal (bearing installation) is grade 6 accuracy.
4.43 The radial runout and end face runout of the outer end of the drum after assembly should not be greater than 0.0003D (D is the inner diameter of the drum). 4.44 The non-machined outer surface shall be coated with corrosion-resistant primer and corrosion-resistant topcoat, and the non-machined inner surface shall be coated with corrosion-resistant primer. The paint layer shall comply with the provisions of relevant standards. Surface oxidation parts and stainless steel parts shall not be painted. Test method
5.1 The test of explosion-proof electrical equipment designed and manufactured by the manufacturer in explosive gas mixture shall be carried out in accordance with GB3836.1~3836.2.
5.2 The shell of the solenoid valve shall be tested in accordance with GB3836.2, and there shall be a material test report and a water pressure test report. 5.3 The vibration intensity of the centrifuge shall be tested in accordance with GB10895. 5.4 The noise test of the centrifuge shall be carried out in accordance with GB10894. The performance test of the centrifuge shall comply with GB10901. 5.57
5.6 The idle running test shall be carried out on the test bench. Inspection rules
The centrifuge shall be inspected and qualified by the quality inspection department of the manufacturer and accompanied by a product quality certificate before it can leave the factory. 6.1
6.2 The centrifuge shall be subjected to factory inspection and type inspection, and the test items shall be carried out in accordance with the provisions of Table 2. Table 2
Idle running test
Loaded running test
Separation performance test
Note△-indicates that the test shall be carried out;
○-indicates that the test shall be carried out as required;
X-indicates that the test shall not be carried out.
Start-up test
Adjustment test
Stop test
Vibration measurement test
Noise measurement test
Operation test
Vibration measurement test
Noise measurement test
Inspection category
6.3 Factory inspection
6.3.1 When the centrifuge is tested empty, each unit shall be subjected to factory inspection. For batch production, products with stable process and product quality, two units should be sampled for inspection. If the first sampling fails, double sampling shall be conducted. If the double sampling still fails, each unit shall be inspected. 6.3.2 The following documents shall be checked before the test:
Main parts material certificate or inspection report; Mechanical property test report of each batch of drum welding specimens; Flaw detection inspection report of drum weld and main shaft; Drum dynamic balance inspection report;
Intergranular corrosion test report of stainless steel welded parts. 6.4 One of the following products shall be subject to type inspection: 4
JB/T5284—91
First prototype of new product;
b. For batch production products, when there are major changes in design or process that affect product performance, type inspection shall be conducted and explosion-proof level appraisal shall be re-performed.
6.5 The inspection of the appearance quality and protective devices of the centrifuge shall comply with the provisions of Articles 4.10, 4.23, 4.24, 4.27 and 4.44 of this standard. 6.6 The measurement of the rotation speed of the drum shall comply with the provisions of Article 4.21. 6.7
The measurement of the temperature rise of the main bearing shall comply with the provisions of Article 4.31. The measurement of the oil temperature of the hydraulic system shall comply with the provisions of Article 4.28. The measurement of the operating current and temperature rise of the main motor shall comply with the provisions of Article 4.22. 6.10
The measurement of the vibration severity level of the centrifuge shall comply with the provisions of Article 4.29. The measurement of the noise of the centrifuge shall comply with the provisions of Article 4.30. The empty (load) running test time after assembly shall comply with the provisions of Article 4.34. The measurement of the sealing performance of the casing shall comply with the provisions of Article 4.36. Marking, packaging, transportation, storage
Fix a metal nameplate that complies with the provisions of JB8 in a conspicuous position of the centrifuge. The nameplate content is: 7.11
Product model and name;
Main technical parameters:
Drum diameter, mm;
Drum length, mm;
Drum speed, r/min;
Separation factor;
Drum volume, L;
Main motor power, kW;
Maximum loading amount of allowed separation materials, kg; Centrifuge weight, kg;
Overall dimensions (length × width × height), mm; Factory number;
Manufacture date;
Manufacturer name.
A sign indicating the direction of drum rotation should be marked on a conspicuous part of the centrifuge body. The outer marking of the packaging box should comply with the provisions of GB191. 7.1.3
7.2 Packaging
The packaging of the centrifuge should comply with the provisions of JB2759. 7.2.1
The following documents should be attached to the packing box:
Packing list;
Product certificate;
Product instruction manual (including installation drawings); List of random equipment and accessories.
7.3 Transportation
7.3.1 The centrifuge should be firmly fixed in the box and should not be inverted during the shipping process. 7.3.2 Random spare parts, spare parts and special tools should be fixed in the box and should not roll to avoid loss and damage during transportation. 7.4 Storage
7.4.1 The centrifuge should be stored in a sheltered place with a relative humidity not exceeding 80%, a temperature below 35°C, no corrosive media. 5
JB/T5284--91
Appendix A
Allowable residual unbalance of centrifuge parts and components for dynamic balancing (supplement)
The allowable residual unbalance of centrifuge parts and components for dynamic balancing is calculated according to formula (A1): M
Where: M—allowable residual unbalance, g.cm; G—
-part (or component) weight, kg;
Allowable eccentricity of the center of gravity of the part (or component), m. The allowable eccentricity of the center of gravity is calculated according to formula (A2): Ge
Where: A—dynamic balancing accuracy, take 6.3mm/s; angular velocity of rotation of the part (or component), 1/s. Figure A1
·(A1)
（A2）
The M value calculated by formula (A1) is the total allowable residual unbalance at the center of gravity of the zero component. The allowable residual unbalance on the two correction planes (see Figure A1) is calculated according to formula (A3) and formula (A4): M,-
·(A4)
In the formula: M,
JB/T5284-91
Allowable residual unbalance on correction plane I (see Figure A1), 8.cm; M——Allowable residual unbalance on correction plane I (see Figure A1), g.cm; M-zero, allowable residual unbalance of the component, 8.cm; a zero, distance from the center of gravity of the component to correction plane 1, mm; b zero, distance from the center of gravity of the component to correction plane 1, mm. Note: Correction planes 1 and 1 should be selected to not affect the strength and working performance of the balancing part and be as far away from each other as possible. Additional Notes:
This standard was proposed and managed by the National Technical Committee for Separation Machinery Standardization. This standard was drafted by the Machinery Factory of Jilin Chemical Industry Company. The main drafter of this standard is Yue Simin.
People's Republic of China
Mechanical Industry Standard
Explosion-proof Scraper Discharge Centrifuge
JB/T5284-91
Published and distributed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (PO Box 8144, Beijing 100081)
Copyright reserved. No reproduction allowed
Printed by Printing Factory, Qinghe County, Hebei Province
Format 880×1230
Print Sheet 3/4 Number of words 14000
First edition in August 1991
First printing in August 1991
Number of prints 00.0011000 Price 1.20 yuan
No. 00290003D (D is the inner diameter of the drum). 4.44 The non-machined outer surface shall be coated with corrosion-resistant primer and corrosion-resistant topcoat, and the non-machined inner surface shall be coated with corrosion-resistant primer. The paint layer shall comply with the provisions of relevant standards. Surface oxidation parts and stainless steel parts shall not be painted. Test method
5.1 The test of explosion-proof electrical equipment designed and manufactured by the manufacturer in explosive gas mixture shall be carried out in accordance with GB3836.1~3836.2.
5.2 The shell of the solenoid valve shall be tested in accordance with GB3836.2, and there shall be a material test report and a water pressure test report. 5.3 The vibration intensity of the centrifuge shall be tested in accordance with GB10895. 5.4 The noise test of the centrifuge shall be carried out in accordance with GB10894. The performance test of the centrifuge shall comply with GB10901. 5.57
5.6 The idling test shall be carried out on the test bench. Inspection rules
The centrifuge shall be inspected and qualified by the quality inspection department of the manufacturer and accompanied by a product quality certificate before it can leave the factory. 6.1
6.2 The centrifuge shall undergo factory inspection and type inspection, and its test items shall be carried out in accordance with the provisions of Table 2. Table 2
No-load operation test
Load operation test
Separation performance test
Note △- indicates that the test should be carried out;
○- indicates that the test is carried out as required;
X- indicates that the test is not carried out.
Start-up test
Adjustment test
Stop test
Vibration test
Noise test
Operation test
Vibration test
Noise test
Inspection category
6.3 Factory inspection
6.3.1 When the centrifuge is tested empty, each centrifuge shall be inspected. For batch production, the process and product quality of the products are stable, two units shall be sampled for inspection. If the first sampling fails, double sampling shall be conducted; if the double sampling still fails, each unit shall be inspected. 6.3.2 Before the test, the following documents shall be checked:
Main parts material certificate or inspection report; Mechanical property test report of each batch of drum welding specimens; Flaw detection inspection report of drum weld and main shaft; Drum dynamic balance inspection report;
Intergranular corrosion test report of stainless steel welded parts. 6.4 One of the following products shall be subject to type inspection: 4
JB/T5284—91
New product first prototype;
b. For mass-produced products, when there are major changes in design or process that affect product performance, type inspection and explosion-proof level identification shall be carried out.
6.5 The inspection of the appearance quality and protective devices of the centrifuge shall comply with the provisions of Articles 4.10, 4.23, 4.24, 4.27 and 4.44 of this standard. 6.6 The measurement of the rotation speed of the drum shall comply with the provisions of Article 4.21. 6.7
The measurement of the temperature rise of the main bearing shall comply with the provisions of Article 4.31. The measurement of the oil temperature of the hydraulic system shall comply with the provisions of Article 4.28. The measurement of the operating current and temperature rise of the main motor shall comply with the provisions of Article 4.22. 6.10
The measurement of the vibration severity level of the centrifuge shall comply with the provisions of Article 4.29. The noise of the centrifuge shall be measured in accordance with the provisions of Article 4.30. The empty (load) running test time after assembly shall comply with the provisions of Article 4.34. The sealing performance of the casing shall be measured in accordance with the provisions of Article 4.36. Marking, packaging, transportation, storage
Fix a metal nameplate that complies with the provisions of JB8 at a conspicuous position of the centrifuge. The nameplate content is: 7.11
Product model and name;
Main technical parameters:
Drum diameter, mm;
Drum length, mm;
Drum speed, r/min;
Separation factor;
Drum volume, L;
Main motor power, kW;
Maximum loading amount of materials allowed for separation, kg; Centrifuge weight, kg;
Overall dimensions (length × width × height), mm; Factory number;
Manufacture date;
Manufacturer name.
A sign indicating the direction of rotation of the drum should be marked on a conspicuous part of the centrifuge body. The markings on the outside of the packaging box should comply with the provisions of GB191. 7.1.3
7.2 Packaging
The packaging of the centrifuge should comply with the provisions of JB2759. 7.2.1
The packaging box should be accompanied by the following documents:
Packing list;
Product certificate;
Product instruction manual (including installation drawings); List of random spare parts and accessories.
7.3 Transportation
7.3.1 The centrifuge should be firmly fixed in the box and should not be inverted during the shipping process. 7.3.2 Random spare parts, spare parts and special tools should be fixed in the box and should not roll to avoid loss and damage during transportation. 7.4 Storage
7.4.1 The centrifuge should be stored in a sheltered place with a relative humidity of no more than 80%, a temperature below 35°C, no corrosive media. 5
JB/T5284--91
Appendix A
Allowable residual unbalance of centrifuge parts and components for dynamic balancing (supplementary part)
The allowable residual unbalance of centrifuge parts and components for dynamic balancing is calculated according to formula (A1): M
Where: M—allowable residual unbalance, g.cm; G—
-part (or component) weight, kg;
Allowable eccentricity of the center of gravity of the part (or component), m. The allowable eccentricity of the center of gravity is calculated according to formula (A2): Ge
Where: A—dynamic balancing accuracy, take 6.3mm/s; part (or component) rotation angular velocity, 1/s. Figure A1
·(A1)
（A2）
The M value calculated by formula (A1) is the total allowable residual unbalance at the center of gravity of the zero component. The allowable residual unbalance on the two correction planes (see Figure A1) is calculated according to formula (A3) and formula (A4): M,-
·(A4)
In the formula: M,
JB/T5284-91
The allowable residual unbalance on correction plane I (see Figure A1), 8.cm; M——The allowable residual unbalance on correction plane I (see Figure A1), g.cm; M-zero, the allowable residual unbalance of the component, 8.cm; a zero, the distance from the center of gravity of the component to correction plane 1, mm; b zero, the distance from the center of gravity of the component to correction plane 1, mm. Note: Correction planes 1 and 1 should be selected to not affect the strength and working performance of the balancing part and be as far away from each other as possible. Additional Notes:
This standard was proposed and managed by the National Technical Committee for Separation Machinery Standardization. This standard was drafted by the Machinery Factory of Jilin Chemical Industry Company. The main drafter of this standard is Yue Simin.
People's Republic of China
Mechanical Industry Standard
Explosion-proof Scraper Discharge Centrifuge
JB/T5284-91
Published and distributed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (PO Box 8144, Beijing 100081)
Copyright reserved. No reproduction allowed
Printed by the Printing Factory of Qinghe County, Hebei Province
Format 880×1230
Print Sheet 3/4 Number of words 14000
First edition in August 1991
First printing in August 1991
Number of prints 00.0011000 Price 1.20 yuan
No. 00290003D (D is the inner diameter of the drum). 4.44 The non-machined outer surface shall be coated with corrosion-resistant primer and corrosion-resistant topcoat, and the non-machined inner surface shall be coated with corrosion-resistant primer. The paint layer shall comply with the provisions of relevant standards. Surface oxidation parts and stainless steel parts shall not be painted. Test method
5.1 The test of explosion-proof electrical equipment designed and manufactured by the manufacturer in explosive gas mixture shall be carried out in accordance with GB3836.1~3836.2.
5.2 The shell of the solenoid valve shall be tested in accordance with GB3836.2, and there shall be a material test report and a water pressure test report. 5.3 The vibration intensity of the centrifuge shall be tested in accordance with GB10895. 5.4 The noise test of the centrifuge shall be carried out in accordance with GB10894. The performance test of the centrifuge shall comply with GB10901. 5.57
5.6 The idling test shall be carried out on the test bench. Inspection rules
The centrifuge shall be inspected and qualified by the quality inspection department of the manufacturer and accompanied by a product quality certificate before it can leave the factory. 6.1
6.2 The centrifuge shall undergo factory inspection and type inspection, and its test items shall be carried out in accordance with the provisions of Table 2. Table 2
No-load operation test
Load operation test
Separation performance test
Note △- indicates that the test should be carried out;
○- indicates that the test is carried out as required;
X- indicates that the test is not carried out.
Start-up test
Adjustment test
Stop test
Vibration test
Noise test
Operation test
Vibration test
Noise test
Inspection category
6.3 Factory inspection
6.3.1 When the centrifuge is tested empty, each centrifuge shall be inspected. For batch production, the process and product quality of the product are stable, two units shall be sampled for inspection. If the first sampling fails, double sampling shall be conducted; if the double sampling still fails, each unit shall be inspected. 6.3.2 Before the test, the following documents shall be checked:
Main parts material certificate or inspection report; Mechanical property test report of each batch of drum welding specimens; Flaw detection inspection report of drum weld and main shaft; Drum dynamic balance inspection report;
Intergranular corrosion test report of stainless steel welded parts. 6.4 One of the following products shall be subject to type inspection: 4
JB/T5284—91
New product first prototype;
b. For mass-produced products, when there are major changes in design or process that affect product performance, type inspection and explosion-proof level identification shall be carried out again.
6.5 The inspection of the appearance quality and protective devices of the centrifuge shall comply with the provisions of Articles 4.10, 4.23, 4.24, 4.27 and 4.44 of this standard. 6.6 The measurement of the rotation speed of the drum shall comply with the provisions of Article 4.21. 6.7
The measurement of the temperature rise of the main bearing shall comply with the provisions of Article 4.31. The measurement of the oil temperature of the hydraulic system shall comply with the provisions of Article 4.28. The measurement of the operating current and temperature rise of the main motor shall comply with the provisions of Article 4.22. 6.10
The measurement of the vibration severity level of the centrifuge shall comply with the provisions of Article 4.29. The noise of the centrifuge shall be measured in accordance with the provisions of Article 4.30. The empty (load) running test time after assembly shall comply with the provisions of Article 4.34. The sealing performance of the casing shall be measured in accordance with the provisions of Article 4.36. Marking, packaging, transportation, storage
Fix a metal nameplate that complies with the provisions of JB8 at a conspicuous position of the centrifuge. The nameplate content is: 7.11
Product model and name;
Main technical parameters:
Drum diameter, mm;
Drum length, mm;
Drum speed, r/min;
Separation factor;
Drum volume, L;
Main motor power, kW;
Maximum loading amount of materials allowed for separation, kg; Centrifuge weight, kg;
Overall dimensions (length × width × height), mm; Factory number;
Manufacture date;
Manufacturer name.
A sign indicating the direction of rotation of the drum should be marked on a conspicuous part of the centrifuge body. The markings on the outside of the packaging box should comply with the provisions of GB191. 7.1.3
7.2 Packaging
The packaging of the centrifuge should comply with the provisions of JB2759. 7.2.1
The packaging box should be accompanied by the following documents:
Packing list;
Product certificate;
Product instruction manual (including installation drawings); List of random spare parts and accessories.
7.3 Transportation
7.3.1 The centrifuge should be firmly fixed in the box and should not be inverted during the shipping process. 7.3.2 Random spare parts, spare parts and special tools should be fixed in the box and should not roll to avoid loss and damage during transportation. 7.4 Storage
7.4.1 The centrifuge should be stored in a sheltered place with a relative humidity of no more than 80%, a temperature below 35°C, no corrosive media, and no other conditions. 5
JB/T5284--91
Appendix A
Allowable residual unbalance of centrifuge parts and components for dynamic balancing (supplementary part)
The allowable residual unbalance of centrifuge parts and components for dynamic balancing is calculated according to formula (A1): M
Where: M—allowable residual unbalance, g.cm; G—
--part (or component) weight, kg;
Allowable eccentricity of the center of gravity of the part (or component), m. The allowable eccentricity of the center of gravity is calculated according to formula (A2): Ge
Where: A—-dynamic balancing accuracy, 6.3mm/s; angular velocity of rotation of the part (or component), 1/s. Figure A1
·(A1)
（A2）
The M value calculated by formula (A1) is the total allowable residual unbalance at the center of gravity of the zero component. The allowable residual unbalance on the two correction planes (see Figure A1) is calculated according to formula (A3) and formula (A4): M,-
·(A4)
In the formula: M,
JB/T5284-91
Allowable residual unbalance on correction plane I (see Figure A1), 8.cm; M——Allowable residual unbalance on correction plane I (see Figure A1), g.cm; M-zero, allowable residual unbalance of the component, 8.cm; a zero, distance from the center of gravity of the component to correction plane 1, mm; b zero, distance from the center of gravity of the component to correction plane 1, mm. Note: Correction planes 1 and 1 should be selected to not affect the strength and working performance of the balancing part and be as far away from each other as possible. Additional Notes:
This standard was proposed and managed by the National Technical Committee for Separation Machinery Standardization. This standard was drafted by the Machinery Factory of Jilin Chemical Industry Company. The main drafter of this standard is Yue Simin.
People's Republic of China
Mechanical Industry Standard
Explosion-proof Scraper Discharge Centrifuge
JB/T5284-91
Published and distributed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (PO Box 8144, Beijing 100081)
Copyright reserved. No reproduction allowed
Printed by Printing Factory, Qinghe County, Hebei Province
Format 880×1230
Print Sheet 3/4 Number of words 14000
First edition in August 1991
First printing in August 1991
Number of prints 00.0011000 Price 1.20 yuan
No. 00292 The centrifuge shall be subjected to factory inspection and type inspection, and the test items shall be carried out in accordance with the provisions of Table 2. Table 2
Idle running test
Loaded running test
Separation performance test
Note△-indicates that the test shall be carried out;
○-indicates that the test shall be carried out as required;
X-indicates that the test shall not be carried out.
Start-up test
Adjustment test
Stop test
Vibration measurement test
Noise measurement test
Operation test
Vibration measurement test
Noise measurement test
Inspection category
6.3 Factory inspection
6.3.1 When the centrifuge is tested empty, each unit shall be subjected to factory inspection. For batch production, products with stable process and product quality, two units should be sampled for inspection. If the first sampling fails, double sampling shall be conducted. If the double sampling still fails, each unit shall be inspected. 6.3.2 The following documents shall be checked before the test:
Main parts material certificate or inspection report; Mechanical property test report of each batch of drum welding specimens; Flaw detection inspection report of drum weld and main shaft; Drum dynamic balance inspection report;
Intergranular corrosion test report of stainless steel welded parts. 6.4 One of the following products shall be subject to type inspection: 4
JB/T5284—91
First prototype of new product;
b. For batch production products, when there are major changes in design or process that affect product performance, type inspection shall be conducted and explosion-proof level appraisal shall be re-performed.
6.5 The inspection of the appearance quality and protective devices of the centrifuge shall comply with the provisions of Articles 4.10, 4.23, 4.24, 4.27 and 4.44 of this standard. 6.6 The measurement of the rotation speed of the drum shall comply with the provisions of Article 4.21. 6.7
The measurement of the temperature rise of the main bearing shall comply with the provisions of Article 4.31. The measurement of the oil temperature of the hydraulic system shall comply with the provisions of Article 4.28. The measurement of the operating current and temperature rise of the main motor shall comply with the provisions of Article 4.22. 6.10
The measurement of the vibration severity level of the centrifuge shall comply with the provisions of Article 4.29. The measurement of the noise of the centrifuge shall comply with the provisions of Article 4.30. The empty (load) running test time after assembly shall comply with the provisions of Article 4.34. The measurement of the sealing performance of the casing shall comply with the provisions of Article 4.36. Marking, packaging, transportation, storage
Fix a metal nameplate that complies with the provisions of JB8 in a conspicuous position of the centrifuge. The nameplate content is: 7.11
Product model and name;
Main technical parameters:
Drum diameter, mm;
Drum length, mm;
Drum speed, r/min;
Separation factor;
Drum volume, L;
Main motor power, kW;
Maximum loading amount of allowed separation materials, kg; Centrifuge weight, kg;
Overall dimensions (length × width × height), mm; Factory number;
Manufacture date;
Manufacturer name.
A sign indicating the direction of drum rotation should be marked on a conspicuous part of the centrifuge body. The outer marking of the packaging box should comply with the provisions of GB191. 7.1.3
7.2 Packaging
The packaging of the centrifuge should comply with the provisions of JB2759. 7.2.1
The following documents should be attached to the packing box:
Packing list;
Product certificate;
Product instruction manual (including installation drawings); List of random equipment and accessories.
7.3 Transportation
7.3.1 The centrifuge should be firmly fixed in the box and should not be inverted during the shipping process. 7.3.2 Random spare parts, spare parts and special tools should be fixed in the box and should not roll to avoid loss and damage during transportation. 7.4 Storage
7.4.1 The centrifuge should be stored in a sheltered place with a relative humidity not exceeding 80%, a temperature below 35°C, no corrosive media. 5
JB/T5284--91
Appendix A
Allowable residual unbalance of centrifuge parts and components for dynamic balancing (supplement)
The allowable residual unbalance of centrifuge parts and components for dynamic balancing is calculated according to formula (A1): M
Where: M—allowable residual unbalance, g.cm; G—
Weight of part (or component), kg;
Allowable eccentricity of center of gravity of part (or component), m. The allowable eccentricity of center of gravity is calculated according to formula (A2): Ge
Where: A—dynamic balancing accuracy, take 6.3mm/s; angular velocity of rotation of part (or component), 1/s. Figure A1
·(A1)
（A2）
The M value calculated by formula (A1) is the total allowable residual unbalance at the center of gravity of the zero component. The allowable residual unbalance on the two correction planes (see Figure A1) is calculated according to formula (A3) and formula (A4): M,-
·(A4)
In the formula: M,
JB/T5284-91
The allowable residual unbalance on correction plane I (see Figure A1), 8.cm; M——The allowable residual unbalance on correction plane I (see Figure A1), g.cm; M-zero, the allowable residual unbalance of the component, 8.cm; a zero, the distance from the center of gravity of the component to correction plane 1, mm; b zero, the distance from the center of gravity of the component to correction plane 1, mm. Note: Correction planes 1 and 1 should be selected to not affect the strength and working performance of the balancing part and be as far away from each other as possible. Additional Notes:
This standard was proposed and managed by the National Technical Committee for Separation Machinery Standardization. This standard was drafted by the Machinery Factory of Jilin Chemical Industry Company. The main drafter of this standard is Yue Simin.
People's Republic of China
Mechanical Industry Standard
Explosion-proof Scraper Discharge Centrifuge
JB/T5284-91
Published and distributed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (PO Box 8144, Beijing 100081)
Copyright reserved. No reproduction allowed
Printed by the Printing Factory of Qinghe County, Hebei Province
Format 880×1230
Print Sheet 3/4 Number of words 14000
First edition in August 1991
First printing in August 1991
Number of prints 00.0011000 Price 1.20 yuan
No. 00292 The centrifuge shall be subjected to factory inspection and type inspection, and the test items shall be carried out in accordance with the provisions of Table 2. Table 2
Idle running test
Loaded running test
Separation performance test
Note△-indicates that the test shall be carried out;
○-indicates that the test shall be carried out as required;
X-indicates that the test shall not be carried out.
Start-up test
Adjustment test
Stop test
Vibration measurement test
Noise measurement test
Operation test
Vibration measurement test
Noise measurement test
Inspection category
6.3 Factory inspection
6.3.1 When the centrifuge is tested empty, each unit shall be subjected to factory inspection. For products in batch production, whose process and product quality are stable, two units should be sampled for inspection. If the first sampling fails, double sampling shall be conducted. If the double sampling still fails, each unit shall be inspected. 6.3.2 The following documents shall be checked before the test:
Main parts material certificate or inspection report; Mechanical property test report of each batch of drum welding specimens; Flaw detection inspection report of drum weld and main shaft; Drum dynamic balance inspection report;
Intergranular corrosion test report of stainless steel welded parts. 6.4 One of the following products shall be subject to type inspection: 4
JB/T5284—91
First prototype of new product;
b. For batch production products, when there are major changes in design or process that affect product performance, type inspection shall be carried out and explosion-proof level identification shall be re-performed.
6.5 The inspection of the appearance quality and protective devices of the centrifuge shall comply with the provisions of Articles 4.10, 4.23, 4.24, 4.27 and 4.44 of this standard. 6.6 The measurement of the rotation speed of the drum shall comply with the provisions of Article 4.21. 6.7
The measurement of the temperature rise of the main bearing shall comply with the provisions of Article 4.31. The measurement of the oil temperature of the hydraulic system shall comply with the provisions of Article 4.28. The measurement of the operating current and temperature rise of the main motor shall comply with the provisions of Article 4.22. 6.10
The measurement of the vibration severity level of the centrifuge shall comply with the provisions of Article 4.29. The measurement of the noise of the centrifuge shall comply with the provisions of Article 4.30. The empty (load) running test time after assembly shall comply with the provisions of Article 4.34. The measurement of the sealing performance of the casing shall comply with the provisions of Article 4.36. Marking, packaging, transportation, storage
Fix a metal nameplate that complies with the provisions of JB8 in a conspicuous position of the centrifuge. The nameplate content is: 7.11
Product model and name;
Main technical parameters:
Drum diameter, mm;
Drum length, mm;
Drum speed, r/min;
Separation factor;
Drum volume, L;
Main motor power, kW;
Maximum loading amount of allowed separation materials, kg; Centrifuge weight, kg;
Overall dimensions (length × width × height), mm; Factory number;
Manufacture date;
Manufacturer name.
A sign indicating the direction of drum rotation should be marked on a conspicuous part of the centrifuge body. The outer marking of the packaging box should comply with the provisions of GB191. 7.1.3
7.2 Packaging
The packaging of the centrifuge should comply with the provisions of JB2759. 7.2.1
The following documents should be attached to the packing box:
Packing list;
Product certificate;
Product instruction manual (including installation drawings); List of random equipment and accessories.
7.3 Transportation
7.3.1 The centrifuge should be firmly fixed in the box and should not be inverted during the shipping process. 7.3.2 Random spare parts, spar
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