This standard specifies the type, basic parameters and dimensions, technical requirements, test methods, inspection rules, marking and packaging, and warranty requirements of YLB series motors. This standard applies to YLB series three-phase asynchronous motors for deep well water pumps (frame size 132~280), and all series of motors derived from this series of motors can also refer to it. JB/T 7126-1993 Technical conditions for three-phase asynchronous motors for YLB series deep well water pumps (frame size 132~280) JB/T7126-1993 standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Technical Conditions for Three-Phase Asynchronous Motors for YLB Series Deep Well Water Pumps (Frame Size 132~280)
1 Subject Content and Scope of Application
JB/T7126-93
This standard specifies the types, basic parameters and dimensions, technical requirements, test methods and inspection rules, as well as requirements for marking, packaging and warranty period of YLB series motors.
This standard applies to three-phase asynchronous motors for YLB series deep well water pumps (frame size 132~280) (hereinafter referred to as motors), and all series of motors derived from this series of motors can also be used as a reference. 2 Reference standards
GB1993
GB12665
GB1032
GB10069.1
JB/Z294
Basic technical requirements for rotating electrical machines
Motor housing protection classification
Motor cooling methods
Motor structure and installation type code
Motor damp heat test requirements for use under general environmental conditions Three-phase asynchronous motor test methods|| tt||Motor dimensions and tolerances Motors with frame number 36400, flange number FF55~FF1080 or FT55~FT1080 Rotating motor noise determination method and limit noise engineering determination method AC low-voltage motor loose-embedded winding turn-to-turn insulation test method Packaging, storage and transportation diagrams and symbols
Type, basic parameters and dimensions
3.1 The enclosure protection level of the motor is IP44 for frame number 132 and IP23 for 160 and above (see GB4942.1). 3.2 The cooling method of the motor is IC0141 for IP44 and IC01 for IP23 (see GB1993). 3.3 The structure and installation type of the motor is IM3230 (see GB997). 3.4 The motor rating is a continuous rating based on the continuous duty system (S1). 3.5 The rated frequency of the motor is 50Hz, the rated voltage is 380V, and the stator windings are all connected in △. 3.6 The motors shall be manufactured according to the following rated powers: 5.5, 7.5, 11, 15, 18.5, 22, 30, 37, 45, 55, 75, 90, 110, 132 kW. 3.7 The corresponding relationship between the motor frame number and core length and the speed and power shall be as specified in Table 1. Approved by the Ministry of Machinery Industry on October 8, 1993
Implemented on January 1, 1994
Frame size and core length
132=2
160=2
180=2
280=2
JB/T7126-93
Note: The numbers 1, 2, and 3 after the dash in the table indicate different core lengths within the same frame size. The installation dimensions and tolerances of the motor shall comply with the provisions of Table 2, and the overall dimensions shall not exceed those of Table 2. 3.8
JB/T7126-93
JB/T712693
The cross-sectional dimensions and tolerances of the motor key shall comply with the provisions of Table 3. Table 3
Frame size
Technical requirements
Basic dimensions
Limit deviation
Basic dimensions
The motor shall meet the requirements of this standard. It shall be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. The motor shall be able to operate at rated values ​​under the following conditions: the altitude shall not exceed 1000m;
The maximum temperature of the ambient air varies with the seasons, but shall not exceed 40℃;
Limit deviation
Note: If the motor is specified to be used at an altitude exceeding 1000m or the ambient air temperature is higher or lower than 40℃, it shall comply with the provisions of GB755. C. The minimum ambient air temperature is -15℃;
The average maximum relative humidity of the wettest month is 90%, and the average minimum temperature of the month is not higher than 25℃. The deviation of the power supply voltage and frequency from the rated value during the operation of the motor shall comply with the provisions of GB755. .When the power, voltage and frequency of the motor are rated, the guaranteed values ​​of its efficiency and power factor shall comply with the provisions of Table 4. Table 4
Synchronous Rotor
Power Factor
JB/T7126-93
Miscellaneous losses are calculated as 0.5% of the rated axial force.
Efficiency is measured by indirect method,
Note,
②The friction loss added by the axial force of the water pump and the transmission equipment and the friction of the rotating parts of the water pump on the motor's radial thrust ball bearing should be regarded as part of the motor output power, and cannot be regarded as the loss of the motor itself. Under rated voltage, the guaranteed value of the ratio of the motor's stall torque to the rated torque shall comply with the provisions of Table 5 4.5
Interval speed/min
Stalled rotor speed/rated torque
Under rated voltage, the guaranteed value of the ratio of the motor's maximum torque to the rated torque shall comply with the provisions of Table 6. Table 6
>45~90
>110~132
Step speed/min
Increase speed/rated torque
Under rated voltage, the guaranteed value of the ratio of the motor increase current to the rated current shall be 7 times. 4.7
Note: When calculating the ratio of the stall current to the rated current, the rated current value used shall be obtained according to the guaranteed value of the rated power, rated voltage, efficiency and power factor (excluding tolerance).
The tolerance of the guaranteed value of the motor electrical performance shall comply with the provisions of Table 7. 101
Efficiency pair
JB/T7126-93
Electrical performance name
Rated power 50kW and below
Rated power above 50kW
Power factor cose
Locked rotor torque
Maximum torque
Locked rotor current
=0.15(1-m)
（1-cosP）
Guaranteed value -15%, +25% (positive tolerance is only specified when the user needs it)
Guaranteed value -10%
Guaranteed value +20%
The motor adopts Class B absolute payment. When the altitude and ambient air temperature meet the requirements of Article 4.2, the temperature rise limit of the motor stator winding (resistance method) shall not exceed 80K; the allowable temperature of the bearing (thermometer method) shall not exceed 95C. If the altitude or ambient air temperature of the test site is different from that of Article 4.2, the temperature rise limit shall be corrected in accordance with the provisions of GB755. 4.10 When the three-phase power supply is balanced, the deviation of any phase of the three-phase no-load current of the motor from the three-phase average value shall not exceed 10% of the three-phase average value.
4.11 Under no-load conditions, the motor shall be able to withstand an increase in speed to 120% of its rated value for 2 minutes without causing harmful changes. 4.12 The insulation resistance of the motor stator winding in hot state or after temperature rise test shall not be less than 0.38MO. 4.13 The stator winding of the motor shall be able to withstand a 1-minute withstand voltage test without breakdown. The frequency of the test voltage is 50Hz and it shall be a sinusoidal waveform as much as possible. The effective value of the voltage is 1760V. When inspecting a large number of continuously produced motors on a conveyor belt, the test time is allowed to be shortened to 18, and the effective value of the test voltage is 2110v.
The stator winding of the motor shall be able to withstand the inter-turn impulse withstand voltage test without breakdown, and the peak value of the test impulse voltage is 2500.V. 4.15 Motor The insulation resistance of the stator winding shall not be less than 0.38M0 after 6 cycles of testing according to the 40℃ alternating damp heat test method specified in GB12665, and it shall be able to withstand the voltage withstand test specified in Article 4.13 without breakdown, but the effective value of the voltage is 1500V4.16 During the inspection test of the motor, the no-load and locked-rotor current and loss shall be within a certain data range, and this data range shall ensure that the motor performance complies with the provisions of Articles 4.4 to 4.8 of this standard. 4.17 The effective value of the vibration velocity measured when the motor is no-load shall not exceed 4.5mm/s. 4.18
The A meter measured when the motor is no-load The noise value of the weighted sound power level shall not exceed the value specified in the grade selected in Table 8 when ordering. The tolerance of the noise value is +3dB(A). Table 8
>15~22
≥30~37
Sound power level
≥45~55
≥75~110
Continued Table 8
Speed/min
2nd level training
The motor should be designed to withstand the maximum axial force shown in Table 9 (excluding the weight of the rotating parts of the motor). Table
Synchronous speed n
Maximum axial force
4.20. The transmission mode of the motor is to connect the water pump shaft to the coupling through the hollow shaft of the motor, connect it with a hook key, and fix it with an adjusting nut.
4.21 The motor is only allowed to rotate in one direction, and there should be a device to prevent the motor from rotating in the opposite direction. The rotation direction of the motor is counterclockwise when viewed from the top. At this time, the letter sequence of the terminal mark should be opposite to the voltage phase sequence of the three-phase power supply. 4.22 The motor should be made with six terminals. There should be a grounding screw in the motor terminal box, and a grounding mark should be set near the grounding screw. This mark should ensure that it is not easy to erase during the entire service period of the motor. 5
Inspection rules and test methods
Each motor must pass the inspection before it can leave the factory, and it should be accompanied by a product certificate. 5.1
5.2 Each motor shall be subject to factory inspection, which includes: mechanical inspection (according to the provisions of Articles 5.5 and 5.6 of this standard); b.
Measurement of the insulation resistance of the stator winding to the casing and between the windings (the cold insulation resistance can be measured during the inspection test, and the insulation resistance in the cold state shall not be lower than the provisions of Article 4.12 of this standard); c.
Measurement of the DC resistance of the stator winding in the actual cold state; withstand voltage test;
turn-to-turn insulation test;
Measurement of no-load current and loss (the no-load characteristic curve needs to be measured during the type test); measurement of locked-rotor current and loss (the locked-rotor characteristic curve needs to be measured during the type test); measurement of noise (according to the provisions of Article 5.6 of this standard). However, the determination of thermal
ZJB/T7136+93
should be guaranteed (according to the provisions of Article 5.6 of this standard) 5.3 In any of the following situations, type inspection must be carried out: the first trial production or small batch trial production after adjustment and finalization, b.
When the changes in the design or process of the motor are sufficient to cause changes in certain performances, the relevant type inspection items should be carried out: when the factory inspection results are unacceptably different from the previous type inspection results, the batch-produced motors are regularly sampled. The sampling test should be conducted at least once every two years. The type inspection items of the motor include:
All items of the factory inspection;
Temperature rise test,
Efficiency and power factor determination,
Maximum torque determination:
Super compliance test.
The mechanical inspection items of the motor include:
Rotation inspection: When the motor is running, it should be smooth and brisk without stagnation. b.
Appearance inspection: Check whether the motor is assembled correctly and correctly. The paint on the motor surface should be dry and complete without stains, damage, cracks, etc.
Installation size, external size and key size inspection; c.
Anti-reverse rotation inspection: Check whether the anti-reverse rotation is effective. d.
5.6 Items a and b of Article 5.5 of this standard must be inspected for each unit, while items h and i of Article 5.2 and items c and d of Article 5.5 can be inspected randomly. The inspection method shall be formulated by the manufacturer.
5.7. The test methods of the various tests specified in this standard shall be as shown in Table 10. Table 10
Test items or names
Article 5.2 Items b~g
Article 5.4 Items b~e
Installation dimensions and pressure test
Noise measurement
Perturbation measurement
Enclosure protection grade test
Alternating damp heat test
Combined test
GB1032
Test method
GB.4772-1 Appendix A
GB10069.1
Appendix to this standard
GB12665
JB/Z294
5.8-Motor enclosure protection grade test and 40℃ alternating damp heat test can be carried out when the product structure is finalized or when the structure and process have major changes.
6 Marking, packaging and warranty period
The nameplate material and the engraving method of the data on the nameplate should ensure that the handwriting is not easily erased during the entire service life of the motor. 6.1
6.2 The nameplate should be fixed on the base. If it is difficult to install the nameplate on the base, it is allowed to be installed on other obvious positions of the motor, but the manufacturer's product reduction number should be marked on the base. The items marked on the nameplate are as follows: manufacturer name and trademark are allowed;
name of the motor (three-phase asynchronous motor for deep well water system): c
motor model:
rated power:
rated frequency;
rated current:
rated voltage:
rated speed:
insulation, etc.:
wiring method:
enclosure protection grade;
quota,
manufacturer's production year and month and production abbreviation:
setting quantity:
standard number:
rotation direction mark (separate label is allowed). JB/T7126-93
6.3 The six outlet terminals of the motor stator winding and the wiring position on the terminal board should have corresponding marks, and it should be ensured that the handwriting is not easy to be extinguished during the entire service period of the motor. Its markings shall be in accordance with the provisions of Table 11. 11
Specified phase name
First phasebZxz.net
Second phase
Third phase
Outlet mark
6.4 The hook key, operation and maintenance instructions and product certificate of the motor shall be provided to the user with each motor. 6.5 The hook key of the motor shall be temporarily fixed in the chain groove of the coupling. Anti-rust and protective measures shall be taken for the coupling shaft hole, the hook key surface and the flange processing surface of the base.
6.6 The packaging of the motor shall be able to ensure that under normal conditions, it will not be affected by moisture and damaged due to poor packaging within one year from the date of shipment.
The words and signs on the outside of the packing box should be clear and complete, and the contents are as follows: the name of the shipping station and the manufacturer:
The name of the receiving station and the receiving unit:
The model and factory number of the motor;
The net weight of the motor and the size of the motor together with the box;
The appropriate position on the outside of the box should be marked with "Caution Light" and "Avoid Moisture\" and other signs, and the graphics should comply with the provisions of GB191. t
6.8 If the user uses and stores the motor correctly according to the provisions of the operating and maintenance instructions, the manufacturer shall ensure that the motor is within one year of use, but not more than two years from the date of shipment from the manufacturer. If the motor is damaged or cannot work properly due to poor manufacturing quality within the specified time, the manufacturer shall repair or replace the parts or motor for the user free of charge. 105
A1 Measurement items
B/7126-93
Appendix A
Vibration measurement method of three-phase asynchronous motor for deep well water pump (supplement)
Vibration speed of the motor during steady-state operation (effective value). A2 Measuring instrument
A2.1 Instrument requirements: The vibration speed measuring instrument shall meet the following requirements: A2.1.1 The frequency response range shall be 10 to 1000Hz (or above 1000Hz). The relative sensitivity spot in this frequency range is based on 80.Hz. The relative sensitivity of other frequencies should be within the range of 10% to 20% of the reference sensitivity. A2.1.2 The measurement error should be less than ±10%.
A2.2 Calibration of instruments: Measuring instruments should be calibrated regularly in accordance with relevant standards. A3 Installation requirements for motors
The motor should be elastically installed. At this time, the compression amount of the elastic support system.$ should meet the requirements of formulas (A1) and (A2) 3 Two-pole motor
Four-pole motor
Where: -Motor installation The actual deformation of the elastic system after compression, mm; the linear coefficient of the elastic material, for latex sponge 0.4; r
-the free height before the elastic coefficient is compressed, mm, in order to ensure that the elastic pad is evenly compressed. The motor to be tested should be installed on the flange first, and then the flange is placed on the elastic pad; fill the middle with a sufficiently rigid transition plate (such as hard plastic plate, laminated plate). The axial inclination angle between the motor mounting end face and the horizontal plane should not be greater than 5°. The total weight of the elastic support system should not exceed 10% of the weight of the motor. Ball production: Special times:,: When the brush transition plate will produce additional movement, it is allowed to place the flange directly on the elastic pad, card A4. The running state of the motor during the measurement
- !,?
Heart appliance products Si Nan Hu: Hejia
The motor should be measured in the no-load running state, at this time the power and voltage should be maintained at the rated value. Ai
A5 Test related matters
During the measurement, the coupling and the cylindrical pin should not be taken. A6 Configuration of measuring points
The configuration of measuring points for enclosed motors shall be in accordance with the provisions of Figure A1, and the number of measuring points is 6. The motor base is configured with 1 point in the axial direction: 2 points are configured at the upper end of the base (closest to the bearing), and the radial positions of the 2 points should be perpendicular to the box, and 1 point is configured in the center of the base: 1 point is configured at the same horizontal plane between the base and the lower bearing: the radial positions of the 2 points should be precisely perpendicular to each other. The configuration of measuring points for closed motors shall be in accordance with the provisions of Figure A2, and the number of measuring points is 6. 1 point is axially arranged at the upper end of the motor: 2 points are arranged at the end cover and the upper shaft. The radial positions of the 2 points should be perpendicular to each other. 1 point is arranged at the center of the base: 2 points are arranged at the lower end of the base (closest to the bearing), and the radial positions of the 2 points should be perpendicular to each other. 106
A7 Measurement requirements
JB/T7126
Transition plate
Elastic pad
During measurement, the contact between the sensor of the measuring instrument and the measuring point must be good, and a reliable connection should be guaranteed. The total weight of the sensor and its mounting accessories should be less than 1/50 of the weight of the motor. The vibration value of the motor is based on the maximum value measured at each measuring point. A8 test report
Wen Haichao
Transition plate
Elastic pad
The test report should state the motor model, motor diameter, rated power, rated speed, bearing type, motor manufacturer name, product number, measuring instrument model, measurement conditions, and measurer. The test report should indicate the location of the maximum vibration measurement point and the simplified diagram of the measurement point configuration.
Additional instructions:
This standard was proposed and managed by the Shanghai Electric Science Research Institute of the Ministry of Machinery Industry. This standard was drafted by Shanghai People's Electric Motor Factory and the drafting factory of the Shanghai Electric Science Research Institute of the Ministry of Machinery Industry.
The main drafters of this standard are Liu Ping, Fan Guolin and Man Meide. From the date of implementation of this standard, JB/DQ3203 (280 for YLB series deep well water pumps) will be invalid.
Electric Motor Factory, Yan'an Electric Motor
Technical conditions for phase asynchronous motors (frame size 132~107
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