Some standard content:
J71 | | tt | | JB | |tt||Ministry of Mechanical and Electronic Industry of the People's Republic of China 1993-07-01 Implementation
Released
Mechanical Industry Standards of the People's Republic of China
Condensate Pump Technical Conditions
1 Topic Content and scope of application
JB/T6536—92
This standard specifies the technical conditions, test methods and inspection rules for condensate pumps and condensate booster pumps (hereinafter referred to as "pumps"). This standard applies to power plants transporting condensate and condensate booster pumps. 2 Reference standards
GB 307.3
GB527
GB528
GB531||GB699
GB1033
GB1040||tt| |GB1174
GB1176
GB1220
GB1384
GB1689
GB2100
GB2828
GB3216
GB3218
GB3512
GB9112
GB9439
GB10889
GB10890
GB/T 13306
GB/T 13384|| tt || JB3199 | | tt | ||Rubber Shore A hardness test method
Technical conditions for high-quality carbon knotted steel
Plastic density and relative density test method
Plastic tensile test method
Cast bearing alloy
Technical conditions of cast steel alloy
Stainless steel rods
Ball black castings
Determination of wear resistance of vulcanized rubber
Stainless acid-resistant steel Technical conditions for other parts
Batch-by-batch inspection and counting sampling procedures and sampling tables (applicable to inspection of continuous batches) Test methods for centrifugal pumps, mixed flow pumps, axial flow pumps and vortex pumps Stainless steel acid-resistant and heat-resistant thin steel plates Technical conditions Rubber Hot air aging test method
Steel pipe flange types
Gray iron castings
Vibration measurement and evaluation method
Noise measurement and evaluation method
Signboard
Technical conditions for packaging of electromechanical products
Technical conditions for plastic water-lubricated wear-resistant materials
Technical conditions for coating of pump products
Pumps should comply with the provisions of this standard, and Manufacture according to drawings and technical documents approved by prescribed procedures. If the user has different requirements for the product than this standard, he or she can follow the regulations in the order form and data sheet [see Appendix B (reference parts)]. 3.1 Performance
3.1.1 The performance parameters of the pump shall comply with the provisions of the corresponding standards or order orders. The performance deviation shall be in accordance with the provisions of Level C in GB3216. Approved by the Ministry of Machinery and Electronics Industry on 1992-12-25 and implemented on 1993-07-01
1
JB/T6536-92
3.1.2 The manufacturer should determine the allowable working range of the pump and draw the performance curve (head, efficiency, shaft power, cavitation residual The relationship curve between volume and flow)
3.1.3 The vibration of the pump should comply with the provisions of Level C in GB10889. 3.1.4 The sound of the pump should comply with the provisions of Level C in GB10890. 3.2 Structural design
3.2.1 Prime mover
The power of the prime mover should usually be selected as shown below. with
%
140
130
120
110
100
0.2
3.2. 2 Critical transfer connection
0.51
10
Coordinate shaft term rate
50
The first critical speed of the rotor should be at least higher than the maximum allowable continuous operation Speed ??10%. 3.2.3 Balance
The rotating parts and components of the pump should be balanced, with an accuracy not lower than level G6.3 in Appendix A (Supplement). 3.2.4 Parts subject to pressure
100
500 kw
3.2.4.1 Shells subject to internal pressure, including shaft seals, mechanical seal end covers, packing glands, etc. Able to withstand the specified maximum working pressure and hydraulic test pressure.
The pressure-bearing parts shall be subjected to a hydraulic test at 1.5 times the maximum working pressure, and there shall be no leakage. 3.2.4.2 The pump suction port and discharge port flanges should comply with the regulations of GB9112. 3.2.4.3 The pump should be equipped with vent holes at the suction and discharge ends to prevent the accumulation of gas when the filter body vaporizes. 3.2.5 Impeller
3.2.5.1 The impeller is a closed type. The first-stage impeller should have good cavitation performance, and an inducer or double-suction impeller can be added at the inlet. 3.2.5.2 The impeller must be reliably fixed on the shaft to prevent circumferential and axial movement. 3.2.6 Sealing ring
The sealing ring should be reliably fixed on the shell. The diameter gap between the sealing ring and the impeller shall be as specified in Table 1. Table 1
Sealing ring
Nominal diameter
European
Sealing ring
Nominal diameter
between
Chen|| tt||3.2.7 Shaft and bushing
3.2.7.1
2
75
0.25
>220~280
0.50
>75~110
0.30
>280~340
0.55
>110~140
0.35||tt| |>340~400
0.60
>140~180
0.40
>400~460
0.65
mm||tt ||>180220
0.45
>460~520
0.70
The shaft should have sufficient regularity. When calculating the deformation of the shaft, the packing should not be considered Supporting role, the deflection of the shaft at the stuffing box due to radial load should not exceed 0.05mm.
JB/T6536-92
The thread direction on the shaft should be such that the fuel is in the In the tightened state, the shaft should retain the center hole. 3.2.7.2
3.2.7.3
3.2.7.4
3.2.7.5
3.2.8
The long axis of the vertical pump can be set in the middle guide bearing. The surface of the shaft sleeve should be wear-resistant and should be reliably fixed on the shaft. The shaft and bushing are seated to prevent leakage of the shaft and bushing. The end of the bushing should extend beyond the sealing gland. Radial bearing
3.2.8.1
3.2.8.2| |tt||3.2.8.3
3.2.8.4
The pump uses rolling bearings, and the bearings should comply with the regulations of GB307.3. The upper bearing of the vertical pump can be a sliding bearing or a rolling bearing. The maximum temperature of the rolling bearing is 80°C. The temperature of the sliding bearing lubricating oil is not higher than 70°C. The intermediate guide bearing generally uses a water-lubricated wear-resistant rubber bearing, and the physical performance should not be lower than The provisions of Table 2. Table 2
Required items
tensile strength
elongation
water deformation
Shore A hardness
grinding|| tt||old
ratio
3.2.8.5
where:
d
loss
change
pressure
Performance indicators
>11.77MPa
>400%
<40%
65~75
On the wear testing machine. During the test, the temperature is <0.2cm*/1.61km. When the temperature is 70℃, within 72h, the aging coefficient is >0.8. The specific pressure of the rubber bearing is <0.5MPa
. The bearing diameter can be dried at room temperature Calculate according to the following formula: $=0.2+
The bearing diameter is ohm.mm;
The diameter of the joint with the bearing, mm.
2d
1000
Inspection standards
GB527
GB528
GB531
GB1689
GB3512| |tt||The down guide bearings of vertical pumps generally use water-lubricated reinforced resin plastic bearings, and their physical properties are not less than those specified in Table 3. 3.2.8.6
Table 3
item
than
its
heavier
tensile strength
break elongation Rate
Yal hardness
Wear mark width
MPa
%
mm
3.2.9 Thrust bearings
Reinforced
plastic
tree
grease
2.10±0.5
>10.0
>100
>12.0|| tt||>150
>70
<6
Inspection standards
GB1033
GB1040
Pump inter-shaft thrust and rotor When the weight is borne by the pump, the pump should use oil-filled sliding thrust bearings; when the axial thrust of the pump is borne by the motor, the motor should have tapered roller thrust bearings, 3.2.10 Bearing body
3.2.10.1 Belt For thin oil-lubricated bearing bodies with a cooling chamber, the cold chamber and the oil-air chamber should be provided with separate chambers, and sealing gaskets and other means should not be used to separate the two chambers.
3.2.10.2 The oil level of the lubricating shaft should be indicated by the Sichuan oil cup or the Shantou standard. A vent plug should be installed on one part of the bearing body and an oil drain plug should be installed on the bottom. 3.2.11 Shaft seal
3
3.2.11.1
3.2.11.2
3.2.11.3
3.2.11.4
JB/ T653692
The shaft seal should use soft packing seals, floating ring seals or mechanical seals. When soft packing is used, sufficient space should be left outside the stuffing box to facilitate the installation and removal of the packing. The packing gland should be provided with flushing holes.
The number of packings should be selected according to the pressure of the liquid. It should be at least 4 circles. The interfaces of each circle should be staggered. The packing glands and stud bolts, nuts and other parts should be rust-proof 3.2.11.5||tt ||3.2.12
Coupling
3.2.12.1
3.2.12.2
Generally elastic coupling is used, and the pump should bear the axial force by the motor. Use rigid coupling. The coupling should be able to transmit the maximum torque of the prime mover, and its applicable speed should be consistent with the speed of the prime mover. The coupling of a horizontal pump should be equipped with a protective cover, which should be able to cover all rotating parts of the coupling. 3.2.12.3
3.2.13 Base
The base should be able to withstand the force and moment transmitted from the pipeline, and should not cause the coaxiality of the two half couplings of the system and the prime mover to exceed the specified 3.2 .13.1 | | tt | hole used.
3.3 Main parts materials
3.3.1
The materials of the main parts of the pump should not be lower than those specified in Table 4, Table 4
Part name
Pump casing
Inlet and outlet sections, middle section, pump base
Outer simplified body
Guide vane
Induction wheel
Impeller
Shaft| |tt||Balance drum
Sleeve
Bracket or bearing seat
Thrust block/tile
Middle guide bearing
Lower guide bearing| |tt||Tie rod bolt
Thrust ring
Material grade
HT200
HT250
20 or 1Cr18Ni9Ti
QT500-7|| tt||ZG1Cr13.ZHSi80-3
45.40Cr
3Cr13
45.3Cr13
HT200
35/ZChSnSb11-6
resistant Grinding rubber
Plastic
Material
Reinforced resin plastic
40Cr
45
Standard code
GB9439|| tt||GB 699.GB 3281
GB1348
GB 2100,GB 1176
GB 699,GB 1220
GB1220
GB699,GB1220|| tt||GB9439
GB 699,GB 1174
According to Table 2
JB3199
According to Table 3
GB1220
GB699|| tt||3.3.2 Pump materials should have certificates or factory inspection data to prove compliance with relevant standards. If required by the user, the chemical composition, mechanical properties, and non-destructive testing test reports of the materials should be provided. 3.4 Manufacturing
3.4.1 Castings
3.4.1.1 Castings should not have casting defects such as shrinkage cavities, porosity, pores, and cracks that affect the strength. 3.4.1.2
The surface of pump castings should Use sand blasting, shot blasting and other methods to clean it. The flash and porcelain openings on the parting surface should be removed to make them flush with the surface of the casting.
3.4.1.3
4||tt| |Under the condition that it does not affect the performance, welding repairs are allowed for castings - pressure parts should be subjected to hydraulic tests after welding repairs, JB/T653692
3.4.1.4 Do not use sharp hammers to hit, block, weld or No resin left to wait for repair. 3.4.1.5 The dimensional deviation of the flow-passing part of the casting should comply with the provisions of Table 5 to Table 8. Generally, Class A precision is used. When higher precision is required, Class B precision is used.
Table 5
Impeller Exit width
small deviation
item
size
deviation
Level A
B
Level||tt ||Mesh
Grade A
Grade B
Center cavity width
Dimensional difference
Equal leaf parts
Basic size| | tt | |tt||4
Level
Level B
3.4.1.6
15
+1.5
0
≤25
+0.7
-0.2
+0.7
0
Blade spacing (blade length)
Import||tt| |±2%
±1.5%
>15~30
+2
0
Positive guide vane width
≤ 30
+1
0
>30~60
+1.2
0
≤10
+0.5| |tt||0
±0.25
>25~30
+1.0
0.2
+1.0
o||tt ||Table 6
Export
Table 7
>30~60
+2.5
0
Table 8||tt| |>30~50
+1.5
-0.2
+1.5
0
Blade thickness
≤4||tt| |±0.6
±0.4
>60~100
+3
0
anti-guide vane width
>60|| tt||+2.5%
o
>10~20
+0.7
0
±0.35
<15
±1
>15~50
±2
>50
±4%||tt| |Guide vane tip height
>20~40
+1
0
±0.5
The surface roughness of the casting should not be lower than Table 9 Provisions Table 9
Part and size range
mm
Coarse section
Parameter R.
m
3.4.2
Casting iron parts
Pot castings
Assembly
400
12.5||tt ||25
The flow-passing parts of impeller and guide vane
Outer
Diameter
>400~1000
25
50|| tt||>1000
50
100
>4
±15%
±10%
>100~140| |tt||+4
·
Guide vane inlet chord length
Full
>50
+3%
0.59%
+3%
0
mm
mm
Blade tip
±2.5%
mm|| tt||>140
+3%
0
mm
Guide vane exit chord length
Part
±1.5%| |tt||>40~60
+1.5
0
±0.75
The over-built part of Yao body
Suction port diameter||tt| |≤350
25
50
>350~600
50
100
>60
+2.59 %
0
±1.25%
non-overflow parts that affect appearance
50
100
5
3.4.2.1
3.4.2.2
JB/T653692
The parts and components of the pump should be inspected and qualified and cleaned before assembly. The main parts and components should be interchangeable, and the installation dimensions of the pump should be consistent with the drawings. After the pump is assembled and before packing is installed, the rotor rotation should be flexible and even 3.4.2.3
3.4.2.4
Pump rotor parts ( Circular runout must be checked (except the rotor parts that bear the thrust of the motor), and the tolerance should not be greater than the requirements in Table 10. Table 10
Position
Impeller seal
Ring outer circle
Basic dimensions
Single-stage pump
Multi-stage pump||tt| |Outer circle of shaft sleeve
3.4.3 Anti-rust treatment and painting
≤50
0.04
0.06
0.04
· >50~120
0.06
0.08
0.06
>120~260
0.08
0.10
0.08| |tt||mm
>260~500
0.10
0.12
0.08
3.4.3.1 When the pump is assembled, the machined surfaces of all parts Lubricating oil or grease should be washed away. The inside and outside of the bearing oil storage room should be cleaned and coated with oil-resistant enamel. The exposed processing surface of the pump should be coated with anti-rust grease. 3.4.3.2 After the pump passes the performance test, the water accumulated in the pump should be removed. Re-apply anti-rust treatment. 3.4.3.3 The painting of the pump shall be in accordance with the provisions of JB/T4297. 4 Test methods
4.1
The chemical composition analysis method and mechanical property test method of materials shall be in accordance with the provisions of Article 3.3. The parts that bear hydraulic pressure shall be tested according to the provisions of Article 3.2.4.1. The hydraulic pressure test shall be carried out with normal temperature water. The pressure holding time shall not be less than 5min. 4.2
The performance test method of the pump shall be in accordance with the provisions of GB3216. 4.3
The vibration measurement method of the pump shall be in accordance with the provisions of GB10889. 4.4
4.5 The noise measurement method of the pump is in accordance with the provisions of GB10890, 5 Inspection Rules
The inspection of the pump is divided into type inspection and factory inspection. 5.1 Type inspection
5.1.1
a.
b.
c.
Type inspection should be done under one of the following circumstances: New product Or trial prototype appraisal of old products transferred to factory production; after formal production, if there are major changes in structure, materials, and processes that may affect product performance: for batch-produced products, during periodic inspection; after long-term discontinuation of products, restoration During production; d.
e.
5.1.2
5.1.3
When the factory inspection results are significantly different from the last type inspection. The inspection items are in accordance with the provisions of GB3216 and include vibration, sound and bearing temperature inspection. The number of inspection units should be no less than 2.
5.2 Factory inspection
5.2.1 Products produced in batches should undergo factory inspection. 5.2.2 The inspection items shall be in accordance with the provisions of GB3216, and include cavitation performance check test at specified points. 5.2.3 The number of inspection units and sampling rules should be in accordance with the provisions of CB2828. The sampling method can use primary or secondary sampling, adopt inspection level II, and the qualified quality level AQL is 4.
The manufacturer cannot carry out due to equipment conditions limitations During type inspection and factory inspection, on-site testing can be carried out. The specific testing method shall be jointly agreed upon by the manufacturer and the user.
5.3 Final inspection
Each pump must be inspected by the quality inspection department of the manufacturer according to the order order requirements. The scope of supply of the complete set should be correct and the packing documents should be 6
complete. Products can only leave the factory after a certificate of conformity is issued. 6 Guarantee period
JB/T6536—92
Under the premise that the user selects the product appropriately and abides by the rules of storage and use, the operation shall not exceed 12 times within 18 months from the date of shipment from the manufacturer. When the product is damaged and fails to work properly due to poor manufacturing quality, the manufacturer is responsible for repairing and replacing the product or parts (excluding wearing parts) free of charge for the user
7 Marking, packaging, transportation and storage|| tt||7.1 Logo
7.1.1 Each pump should have a product nameplate nailed firmly in an obvious position. The size and technical requirements of the nameplate shall be in accordance with GB/T13306. 7.1.2 The nameplate should include the following:
a, manufacturer name;
Name and model of the pump:
b.
Main parameters of the pump: flow, m\/h; Lift, m; Speed, r/min; Equipped power, kW; Critical NPSH, m; Pump weight, kgc.
Pump manufacturing number and manufacturing date.
d.
7.1.3 The direction of rotation of the pump should be clearly visible. It should be indicated by a red arrow (cast or make another sign and nail it). 7.2 Packaging, transportation and storage
7.2.1 The packaging of the product should comply with the regulations of GB/T13384. For items that are packed in boxes and shipped separately, labels or other forms of markings should be used to indicate the component number and name.
7.2.2 After anti-rust treatment and surface painting, the suction port and discharge port of the pump should be sealed with a cover plate, and other holes communicating with the inside of the pump should be blocked with pipes. Each pump should be shipped with the following documents and drawings when leaving the factory, and should be sealed in a waterproof and traceable bag: 7.2.3
a.
b.
c.||tt| |d.
e.
Product certificate;
Packing list;
Product manual:
Product structure diagram:
The performance of the pump is shown in line diagrams and performance tables.
The pump should be prevented from rust and damage during storage. The seal of the pump is valid for 12 months. After expiration, the oil seal should be inspected and re-sealed 7.2.4
8| |tt||Complete range
Users can order all or part of the following complete supply range according to their needs, and indicate it in the order form: a. Pump;
b. Prime mover; || tt||c.
Coupling and protective cover;
d. Common base and anchor screws;
e.A complete set of necessary wearing parts and accessories;
f
Special tools necessary to assemble and disassemble the pump.
Yunzuo Qingzhen
e
5000
4000
3000
2000
1000
500
0
300
200
100
50
40
30www.bzxz.net
10| |tt||0.1
30
5
100
2
3
JB/T6536-92
Appendix A
Allowable eccentricity
(supplement)
45
1000
2
Figure A1
3
45
10000
Q
3
4
Speed ??n
100000/min
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