Some standard content:
J71 | | tt | | JB | tt||Technical Conditions
Implemented on 1993-07-01
The Ministry of Mechanical and Electronic Industry of the People's Republic of China released the Machinery Industry Standard of the People's Republic of China
Centrifugal sewage pump
1 Subject content and scope of application
Technical conditions
JB/T 653592
Replaces JB2975-81
This standard specifies the centrifugal sewage ticket (hereinafter referred to as "centrifugal\ ) technical requirements, test methods, inspection rules, etc. This standard is applicable to pumps that transport sewage, feces, or liquids containing solid suspended matter such as fibers, paper scraps, fruits, fish, etc. The liquids transported should meet the following requirements:
a.
The temperature does not exceed 80℃:
The maximum clump diameter of the solid suspended matter does not exceed 90% of the minimum size of the cumulative flow section; b.||tt ||Density generally does not exceed 1050kg/m,
e.
2 reference standard
GB699
GB700
GB1176
GB1220| |tt||GB1348
GB1569
GB2100
GB2828
GB3077
GB3216
GB7021
GB9112||tt ||GB9439
GB10889
GB10890
GB/T13306
GB/T13384
JB/T4297
JB/T6534||tt ||3 Terms
Technical Conditions for High Quality Carbon Structural Steel
Carbon Structural Steel
Technical Conditions for Casting Copper Alloys
Stainless Steel Rods
Nodular Iron Castings
National column shaft extension
Technical conditions of stainless acid-resistant steel castings
Batch-by-batch inspection and counting sampling procedures and sampling tables (applicable to inspection of continuous batches) Technical conditions of alloy structural steel| |tt||Centrifugal ticket, mixed flow ticket, axial flow ticket and vortex mining test method centrifugal ticket terminology
Steel pipe flange type
Vibration measurement and measurement of gray iron castings
Evaluation method
Pump noise measurement and evaluation method
Signage
General technical conditions for mechanical and electrical product packaging
Coating technical conditions for mulberry products
Centrifugal sewage Pump type and basic parameters
3.1 Common terms and terms in this standard comply with the provisions of GB7021. 3.2 Definitions of special terms in this standard
3.2.1 Consumable parts
Due to the abrasion and corrosion of the medium Parts that are prone to failure, such as impellers, shafts, sealing rings, etc. 3.2.2 Minimum size of flow section
In the flow channel composed of flow parts, the minimum size of the section that affects the passage of solid suspended matter. The Ministry of Mechanical and Electronic Industry approved the implementation on 1993-07-01 on 1992-12-25
1
3.2.3 Guard plate
JB/T6535—92
Withstand liquid pressure and abrasive, corroded disc-shaped inner shell parts, 3.2.4 The first critical speed
The pump speed when the first lateral self-reporting frequency of rotating parts and components is consistent with the rotation regularity. 4 Technical requirements
The pump should comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. If the user has different requirements for the product than this standard, the regulations in the order form and Appendix B (reference parts) data sheet shall be followed. 4.1 Performance
4.1.1 The performance parameters of the pump should comply with JB/T6534 and other corresponding standards or ordering orders. 4.1.2 The pump manufacturer should determine the allowable workpiece range of the ticket and draw the performance curve (the relationship curve between head, shaft power, efficiency, necessary NPSH and flow rate),
4.1.3 Pump vibration The intensity should comply with the provisions of level C in GB10889. For pumps with single-channel impellers, the vibration intensity should be reduced by one category.
When the pump rotation is less than 600r/min, the assessment is based on 600r/min. 4.1.4 The noise of the pump should comply with the requirements of level C in GB10890. 4.2 Structural design
4.2.1 Prime mover
The prime mover should be selected according to the maximum shaft power of the pump operating conditions. When the power is greater than or equal to 100kW, the prime mover power should be at least the maximum shaft power. 1.1 times; when the power is less than 100kW, the prime mover power should be at least 1.2 times the maximum shaft power. 4.2.2 Critical speed
The actual first critical speed of the pump should be at least 10% higher than the maximum allowable continuous operating speed within the ticketed use range. 4.2.3 Balance
The impeller should be balanced, and its balance accuracy should not be lower than the G16 level in Appendix A (Supplement). 4.2.4 Shell
4.2.4.1 The shell can be designed into two types: radially split or horizontally split. The shell should be able to withstand the maximum working pressure and hydraulic test pressure within the allowable working range of the pump, and Can limit deformation. 4.2.4.2 The hydraulic test pressure should be 1.5 times the maximum working pressure of the ticket, and there should be no stagnation during the pressure holding time. 4.2.4.3 The suction and discharge flanges should be able to withstand the maximum allowable working pressure. The flange size should comply with the requirements of GB9112, otherwise a short pipe should be configured.
4.2.5 Impeller
4.2.5.1 The impeller should be designed as closed, open or spiral type. 4.2.5.2 The impeller should be reliably fixed on the shaft to prevent circumferential or axial movement during rotation. 4.2.5.3 When it is necessary to adjust the axial clearance of the impeller, an external adjustment mechanism should be provided. 4.2.6 Shaft and bushing
4.2.6.1 The shaft should have sufficient strength and stiffness. 4.2.6.2 The direction of thread rotation on the shaft should keep its connecting parts in a tight state when the shaft rotates. 4.2.6.3 The shaft extension size should comply with the regulations of GB1569. 4.2.6.4 The center holes at both ends of the shaft should be retained.
4.6.2.5 A shaft sleeve can be set between the shaft and the shaft seal, and the shaft should be resistant to decay. 4.2.6.6 The shaft sleeve should be reliably fixed on the shaft, and liquid stagnation between the shaft and the shaft sleeve should be prevented. 4.2.6.7 For tickets using packing seals and mechanical seals, the shaft sleeve should extend beyond the end face of the gland. 4.2.7 The bearing
should be a rolling bearing and lubricated with thin oil or grease. Its operating temperature should not exceed 75°C. 4.2.8 Bearing body
JB/T 653592
4.2.8.1 The seams on the bearing body that communicate with the outside world should be able to prevent the intrusion of dirt and maintain normal working conditions The leakage of lower lubricant (grease). 4.2.8.2 When the bearing is lubricated with thin oil, the bearing body should have an oil drain hole and an oil level gauge. 4.2.9 The sealing space
between the pump body or guard plate and the impeller should comply with the following Regulations: a.
When radial sealing type is adopted, the distance value in the diameter direction shall comply with the provisions of Table 1. Table 1
Basic diameter diameter
Space||tt| |b.
limited
90
0. 60
>90~120
0. 70
>120~180| |tt||0.80
>180~250
0. 90
When the axial seal type is used, the gap value should be 0.25~0.5mm. 4.2.10 Shaft seal
The shaft seal can be sealed by packing or machine seal: the shaft seal body should be equipped with a hole for filling the shaft seal water. 4.2.11 Hand hole
>250~500
1.00
For pumps with a discharge port diameter greater than 150mm, hand holes for clearing blockages should be set at appropriate locations. 4.2.12 Base
mm
>500
1.20
Pumps with a discharge port diameter less than or equal to 200mm should be equipped with a common base with the motor: Pumps with a discharge port diameter greater than 200mm generally Configure separate base.
The base should be able to withstand the force and moment transmitted from the pipeline without causing the coaxiality of the coupling between the ticket and the prime mover to exceed the specified value. A sufficient number of grouting holes with a diameter of not less than 100mm or a similar area should be provided on the base. 4.2.13 Transmission device
The pump should be driven by elastic couplings or sheaves, etc., and should be equipped with a protective cover. The coupling or sheave should be able to transmit the maximum torque of the prime mover.
4.2.14 Lifting
For the entire machine or heavier parts and components, a lifting device should be installed. 4.3 Main parts materials
4.3.1 The properties of the materials selected for the main parts should not be lower than those specified in Table 2. 4. 3. 2
When selecting non-metallic materials, the materials selected should comply with the relevant standards. Table 2
Part name
Polymer, pump assembly, protection| |tt||Plate, short tube or paste tube
Sealing ring, bushing
Leaf
Wheel
Bearing body, bracket body
Shaft
4.4 Manufacturing
4.4.1 Castings
Material name or grade
HT200.QT40015
Stainless acid-resistant aluminum
HT200|| tt||Stainless acid-resistant pot
HT200, bone ketone
Stainless acid-resistant steel
HT200, QT40015
45.40Cr
Stainless acid-resistant steel| |tt||Material standards
GB 9439.GB 1348
GB2100
GB 9439.GB1220
GB2100
CB 9439,GB 1176||tt ||GB2100
GB 9439,GB 1348
GB 699.GB3077
GB1220
3
4.4. 1. 1
4.4 . 1.2
3B/T6535-92
Castings should be cleaned to remove porcelain, ports and sticky sand, etc. The surface of the flow channel should be smooth and smooth. Such parts are not allowed to have defects such as looseness and pores that reduce their strength. Welding repairs are allowed on castings as long as the performance is not affected. 4.4. 1.3
The dimensional deviation of the main flow-passing parts of the casting shall be in accordance with the provisions of Level A in Table 3 to Table 5. When there are higher requirements, adopt the B4.4.1.4
level accuracy in the table.
Table 3
Impeller outlet width
Class A
Size
Deviation
Class B
Blade spacing|| tt||Size deviation
%
Pump body experience width
Size deviation
4. 4. 1. 5
mm
≤15
+1.5
0
25
+0.7
0. 2
+0. 7
0
A-level
B-level
>15~30
+2. 0
0
>25~30|| tt||+1.0
0. 2
+1. 0
o
Table 4
Full
Table 5|| tt |
mm
Coarse-grained
Parameter Rbzxz.net
m
Zinc iron parts
brocade pin parts
4.4.2 Assembly
400
12.5
25
impeller flow part
outside
>400~1000
25| |tt||50
>1000
50
100
4.4.2.1 All parts and components should be inspected and qualified before assembly. 4. 4. 2. 2
a.
The circumferential runout of the assembled rotor parts should meet the following requirements: >30~50
+1.5
-0.2
+1.5
0
Part
±2
±1.5
>60~100
+3. 0
0
全
inch
>100~140
+4.0
0
Yao body overflow Part
Suction port diameter
≤350
25
50
>350~600
50
100| |tt||The circular runout of the outer surface of the shaft or sleeve that cooperates with the shaft seal should not be greater than the requirements in Table 7; Table 7
Basic dimensions of the journal or shaft capsule
Smoke runout| |tt||b.
so
0. 09
>50~120
0. 12
The runout of the peripheral surface of the impeller sealing ring Should not be greater than the requirements in Table 8. >120~260
0.14
>50
+3%
mm
0.5%
+3%||tt| |0
mm
>140
+3%
o
non-overcurrent that affects the appearance
Part
50
100
mm
>260~500
0.16
Basic size of impeller seal ring
west Kaidong
90
0.12
JB/T6535-92
Table 8
>90~120
0. 15|| tt||>120~260
0.18
>260~500
0.21
4.4.2.3 After the pump assembly is completed, the rotating rotor should be evenly adjusted. Systems containing packing should be inspected before packing is tightened. 4.4.2.4 After anti-rust treatment and painting, the suction inlet and discharge port of the pump should be firmly covered with covers. 4.4.3 Anti-rust and painting
4.4.3.1 The mating parts that are easy to engage with the parts and materials should be coated with molybdenum disulfide lubricant. 4.4.3.2 The exposed processed surfaces after assembly should be coated with anti-rust oil (oil seal). 4.4.3.3 The paint finish shall comply with the requirements of JB/T4297. 4.4.3.4 After the test is completed, the water accumulated in the pump should be removed and rust-proof treatment should be carried out again. 4.5 Use
4.5.1 When the impeller and shaft are threaded, the motor must not drive the pump shaft to rotate in the opposite direction under any circumstances. 4.5.2 A grid or filter should be installed in front of the suction inlet of the pump according to the size of the suspended solids allowed to pass through the pump. 4.5.3 The pump should be filled with shaft seal water during operation, and the manufacturer should clearly specify the water pressure value. 5 Test method
mm
>500
0. 25
5.1 The chemical composition analysis method and mechanical property test method of the material should comply with the relevant material standards in Article 4.3 According to the regulations, the medium of 5.2 hydraulic pressure test shall be normal temperature water, and the pressure holding time shall not be less than 10 minutes. 5.3 The performance test method of the pump should comply with the regulations of GB3216. 5.4 The vibration measurement method of the pump should comply with the provisions of GB10889. However, when measuring the vibration with a recording speed of less than 600r/min, the lower limit of the frequency response range of the selected measuring instrument (including the sensor) should not be greater than 2Hz. The noise measurement method of 5.5 votes Should comply with the regulations of GB10890. 6 Inspection Rules
Pump inspection is divided into type inspection and factory inspection. 6.1 Type inspection
6.1.1 Type inspection shall be carried out when one of the following conditions is met: new products or old products are transferred to the factory for trial production and type appraisal: a,
b.
c.
d.
e.
After formal production, if there are major changes in structure, materials, and processes that may affect product performance; during periodic inspection of officially produced products: When the product resumes production after a long-term suspension: When the factory inspection results are significantly different from the last type inspection. The test items should comply with the regulations of GB3216.
6.1.2
6.1.3 The number of inspection units shall be no less than 2:
6.2 Factory inspection
6.2.1 Products produced in batches shall undergo factory inspection. 6.2.2 The test items should be in accordance with the provisions of GB3216. 6.2.3. The number of inspection units and inspection rules should be in accordance with the provisions of GB2828. The sampling plan can adopt one-time or two-time sampling, adopt inspection level 1, and the qualified quality level AQL is 4
6.3 Final inspection
Manufacturer quality inspection The department should receive the order form and packing list to check the correctness and completeness of the scope of supply, including the quality of product painting and packaging and the completeness of technical documents.
5
Guarantee period
JB/T 653592
When the user complies with the provisions of this standard and installs and uses it according to the product manual, the pump will be guaranteed from the date of shipment. Within 18 months (the oil seal period shall not exceed 12 months), if the product is damaged or cannot work properly due to poor manufacturing quality, the manufacturer shall be responsible for free replacement of parts or repairs (excluding wearing parts) for the user.
8 Marking, packaging, transportation and storage
8.1 A nameplate should be nailed to an appropriate and visible part of the pump. The type, size and technical requirements of the nameplate should comply with the regulations of GB/T13306. The nameplate should indicate the following:
a.
6.
c.
d.
Manufacturer name:
Pump name and model:
Pump parameters:
Flow rate, m*/h;
Head, m;| |tt||Speed, r/min:
Efficiency, %;
Required NPSH.m
Pump mass, kg:
Ticket factory number and Date of manufacture.
The direction of pump rotation should be marked with a cast arrow or steering plate in an obvious location. Arrows should be in red. 8.2
Packaging should comply with the regulations of GB/T13384.
8.3
Each pump should be delivered from the factory with the following documents and placed in a waterproof package: a.
b.
e
d .
General assembly drawing, installation drawing;
Product manual:
Packing list;
Product certificate.
8.4 Transportation and storage should be able to prevent damage to the pump, corrosion, and loss of parts and documents. The oil seal is valid for 12 months and should be re-sealed after expiration.
9 complete set range
Users can order all or part of the following supply range according to their needs, and indicate it in the order form. a.
b.
c.
d.
e.
f.
6
pump,
Motor:
Transmission device (transmission parts and protective cover);
Base and foot tight fittings;
Necessary special tools;||tt| |Vulnerable spare parts.
JB/T553592
Appendix A
Allowable eccentricity
(Supplement)
A1 The balance accuracy specified in Article 4.2.3 and the following According to the regulations, the allowable eccentricity e is determined from Figure A1: For pumps with a discharge port diameter greater than 250mm, the rotation speed is 1500r/minta.
b. For pumps with a discharge port diameter less than or equal to 250mm, the rotation speed is 1000r/min, A2 The final allowed unbalanced mass of the impeller is less than 10g, calculated as 10g, μm
5000
1000
allowable eccentricity limit
100
10||tt ||0
30
5
100
45
1000
Figure A1
10000||tt| |100000
#er/min
The purpose of B1 data sheet
B1.1
is for users to inquire, place orders or sign contracts.
Provides manufacturers with product quotations and organizes production. BI.2
Fill in the B2 data sheet
B2.1 Items marked with a black triangle are to be filled in by the user; JB/T 653592
Appendix B
According to||tt ||Number
Order
(supplementary parts)
B2.2 blank columns should be filled in with supplementary content and modifications as needed; the rest of B2.3 should be filled in by the manufacturer.
B3 data sheet filling method
B3.1 directly fill in the specific content,
B3.2 selection. Keep what you need and cross out what you don’t. B3.3 Supplement or modify the form.
The format content of the data sheet is shown in the centrifugal sewage bill data sheet (see Table B1), 8
1 Directly fill in the specific content,
B3.2 selection. Keep what you need and cross out what you don’t. B3.3 Supplement or modify the form.
The format content of the data sheet is shown in the centrifugal sewage bill data sheet (see Table B1), 8
1 Directly fill in the specific content,
B3.2 selection. Keep what you need and cross out what you don’t. B3.3 Supplement or modify the form.
The format content of the data sheet is shown in the centrifugal sewage bill data sheet (see Table B1), 8
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