JB/T 7120-1993 Technical requirements for YZC series (IP44) low vibration and low noise three-phase asynchronous motors (frame size 80 to 160)
Some standard content:
Mechanical Industry Standard of the People's Republic of China
Technical Conditions for YZC Series (IP44) Low Vibration and Low Noise Three-Phase Asynchronous Motors (Frame Size 80160) 1 Subject Content and Scope of Application
JB/T7120-93
This standard specifies the type, basic parameters and dimensions, technical requirements, test methods and inspection rules, as well as packaging, marking and warranty requirements for YZC Series (IP44) Low Vibration and Low Noise Three-Phase Asynchronous Motors. This standard applies to YZC Series (IP44) three-phase asynchronous motors (frame sizes 80 to 160) (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
GB10069
GB10068
GB1032
JB/Z294
JB/Z346
Basic technical requirements for rotating electrical machines
Motor housing protection classification
Motor cooling method
Motor structure and installation type code
Motor dimensions and tolerances Frame size 36～400 Flange number FF55～FF10 80 or FT55~FT1080 motorsDamp heat test requirements for motors used under general environmental conditionsDetermination method and limit of noise of rotating motors
Determination method and limit of vibration of rotating motors
Test method of three-phase asynchronous motors
Test method of inter-turn insulation of scattered windings of AC low-voltage motorsInter-turn insulation test limit of scattered windings of AC low-voltage motorsPackaging, storage and transportation graphic symbols
Type, basic parameters and dimensions
3.1 The enclosure protection level of the motor is IP44 (see GB4942.1). 3.2 The cooling method of the motor is IC0141 (see GB1993). 3.3 The structure and installation type of the motor are IMB3, IMB5, IMB6, IMB7, IMB8, IMB35, IMV1, IMV3, IMV5, IMV6, IMV15 and IMV36 (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 and the rated voltage is 380V. The motors with a power of 3kW or less are connected in Y connection, and the other powers are connected in A connection.
3.6 The motors shall be manufactured according to the following rated powers: 0.55, 0.75, 1.1, 1.5, 2.2, 3, 4, 5.5, 7.5, 11, 15, 18.5kW. 3.7 The corresponding relationship between the motor frame number and the synchronous 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
JB/T7120-93
Note: The numbers 1 and 2 after S, M, and L represent different powers under the same frame size and speed. Motor size and tolerance
The installation size and tolerance of the motor shall comply with the provisions of Tables 2 to 4, and the overall size shall not exceed the provisions of Tables 2 to 4. 3.8.1
2) GE-D
Y2C80~132
Car products This product benefits
2》K hole quality room will be different based on your contact line GE
YZC80~132
0 seat number), the rest is (\)
YZC160
Y2C80~160
IMB7, IMB8, IMV5) installation and overall dimensions LS
Y2C160
Motor with convex cover (MB35 、IMV15、IMV36）installation and dimensions Y2C80~160
YZC80~132
, 80 hangar number is (\), its gold hair (\) DS hole, K without health school based on the test of the theory of L as the auxiliary equipment
YZC80~132
machine base number
machine sound without feet,
YZC160
IMV15、IMV36）installation and dimensions of this
+0：01|| tt||JB/T712093
YZC160
Y2C80~160
Li Ji Zhao car
YZC80~160
, IMV1, IMV3) installation and overall dimensions of motors with convex ends on the end cover (IMB5, R
Fu Li report limit
165130
215180
Kili limit basic
retractable degree
machine health number
YZC80~132
JB/T712093
YZC160
YZC80~160
IMV1, IMV3) Installation and dimensions
Table 4 Motors without base and flanges on end cover (TMB5, N
Note: 1) P dimension is the maximum limit
215180
2) GE=DG, the limit deviation of GE for 80 base is (*), and for the rest is (*→\). 3) L' is the dimension after installing silencer.
4) The position tolerance of S hole is based on the axis of the shaft extension, 5》R is the distance from the flange fitting to the shoulder of the shaft extension. Deviation
Kili limit
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JB/T7120-93
The size and tolerance of the motor shaft extension key shall comply with the provisions of Table 5. 3.8.2
3.8.3The radial circular runout tolerance at the half of the motor shaft extension length shall comply with the provisions of Table 6. Table 6
Shaft extension diameter
>30~50
Circular runout tolerance
3.8.4The radial circular runout tolerance of the motor flange stop to the motor axis and the end face circular runout tolerance of the flange mating surface to the motor axis shall comply with the provisions of Table 7.
Flange stop diameter
130~230
>230~450
5The flatness tolerance of the motor foot support surface shall comply with the provisions of Table 8. 3.8.5
80~112
132~160
3.8.6The parallelism tolerance of the motor axis to the foot support surface is 0.40mm. The symmetry tolerance of the silver groove on the motor shaft extension shall comply with the provisions of Table 9. 3.8.7
Width (F)
Technical requirements
Surface tolerance
Symmetry tolerance
4.1 The motor shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. mm
JB/T712093
4.2 The motor shall be able to operate at rated value under the following altitude, ambient air temperature and ambient air relative humidity conditions. 4.2.1 The altitude shall not exceed 1000m.
4.2.2 The maximum ambient air temperature varies with the seasons, but shall not exceed 40℃. 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. 4.2.3. The minimum ambient air temperature is -15℃. 4.2.4 The average maximum relative humidity of the wettest month is 90%, and the average minimum temperature of the month is not higher than 25℃. 4.3 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. 4.4 When the power, voltage and rate of the motor are rated, the guaranteed values of its efficiency and power factor shall comply with the provisions of Table 10. Table 10
Note: The efficiency is determined by the loss analysis method, and the stray loss is determined by actual measurement.
4.5. 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 11. Table 11
Stalled-rotor torque/rated torque
JB/T7120-93
Continued Table 11
Stalled-rotor torque/rated torque
Under rated voltage, the guaranteed value of the ratio of the motor's minimum torque to the rated torque during starting shall comply with the provisions of Table 12. 4.6
Minimum torque/rated torque
7 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 13. 4.7
Maximum torque/rated torque
JB/T7120-93
Continued Table 13
Maximum torque/rated torque
Under rated voltage, the guaranteed value of the ratio of the motor's stall current to the rated current shall comply with the provisions of Table 14. Table 14
Wall current/rated current
Note: When calculating the ratio of the ramp current to the rated current, the rated current value used shall be obtained according to the guaranteed values of the rated power, rated voltage, efficiency and power factor.
4.9·The tolerance of the guaranteed value of the motor's electrical performance shall comply with the provisions of Table 15. Table 15
Electrical performance name
Power factor cos
Tower torque
Minimum torque
Maximum torque
-0.15(1—）
（1-cosp)/6, minimum is -0.02
-15% of guaranteed value
-15% of guaranteed value
-10% of guaranteed value
Locked rotor current
JB/T7120-93
ContinuedTable 15
Electrical performance name
+20% of guaranteed value
4.10 The motor adopts Class B insulation. 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) is 80K, and the allowable temperature of the bearing (thermometer method) should not exceed 95℃. If the altitude or ambient air temperature of the test site is different from that specified in Article 4.2, the temperature rise limit shall be revised in accordance with the provisions of GB755. 4.11 The motor shall be able to withstand the maximum torque value specified in Article 4.7 of this standard (including tolerance) in the case of hot state and gradually increasing torque for 15 seconds without sudden change in speed, stoppage and harmful deformation. At this time, the voltage and frequency shall be maintained at the rated value. 4.12 The motor shall be able to withstand an increase in speed to 120% of its rated value for 2 minutes without harmful deformation under no-load conditions. 4.13 The insulation resistance of the motor stator winding shall not be less than 0.38MM in the hot state or after the temperature rise test. 4.14 The stator winding of the motor shall be able to withstand a withstand voltage test for 1 minute without breakdown. The frequency of the test voltage is 50Hz and it shall be as sinusoidal as possible: the effective value of the voltage is 1760V. When inspecting and testing motors produced continuously in large quantities on conveyor belts, the test time is allowed to be shortened to 1s, and the effective value of the test voltage is 2110V, and the test voltage should be applied suddenly. The stator winding of the motor should be able to withstand the inter-turn impulse withstand voltage test without breakdown, and the peak value of the test impulse voltage shall be in accordance with the specifications of JB/Z346. 4.15
After the stator winding of the motor is tested for 6 cycles according to the 40℃ alternating damp heat test method specified in GB12665, the insulation resistance 4.16
should not be less than 0.38MQ, and it should be able to withstand the withstand voltage test specified in Article 4.14 without breakdown, but the effective value of the voltage is 1500V. 4.17 The effective value of the vibration velocity measured by the motor when it is unloaded: it should be the value specified by the grade selected in Table 16 when ordering. The tolerance of the vibration value is +10%, but it should not be lower than the vibration limit requirements specified in GB10068. Table 16
Frame size
Vibration level
80~132
Vibration velocity (effective value)
80~132
4.18 The noise value of the A-weighted sound power level measured when the motor is no-load should be the value specified by the level selected in Table 17 when ordering. The tolerance of the noise value is +3dB.
JB/T712093
Continued Table 17
There are 8 combinations of vibration level and noise level of the motor, which are listed in Table 18. Table 18
Vibration level
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 should not be greater than 10% of the three-phase average value.
When the motor is inspected and tested, the no-load and stalled current and loss should be within a certain data range, which should ensure that the motor performance complies with the provisions of Articles 4.4 to 4.9 of this standard. 4.22
The unevenness of the motor air gap should not be greater than that specified in Table 19. Table
In the table: 8-
air European nominal value
-uneven value, which is defined as
where: 81, 82, 8 are the air gap values measured at 120° apart, 0. 55
4.23 The motor has a cylindrical shaft extension. If the two parties have another agreement, the motor is allowed to be made into two shaft extensions. The second shaft extension should be able to transmit the rated power, but can only be driven by a coupling.
4.24 The non-shaft extension end of the motor is allowed to be equipped with a silencer. 4422
The unevenness of the air gap of the motor should not be greater than that specified in Table 19. Table
In the table: 8-
air European nominal value
an uneven value, which is defined as
where: 81, 82, 8 are the air gap values measured at 120° apart, 0. 55
4.23The motor has a cylindrical shaft extension. If the two parties have another agreement, the motor is allowed to be made into two shaft extensions. The second shaft extension should be able to transmit the rated power, but it can only be driven by a coupling.
4.24The non-shaft extension end of the motor is allowed to be equipped with a silencer. 4422
The unevenness of the air gap of the motor should not be greater than that specified in Table 19. Table
In the table: 8-
air European nominal value
an uneven value, which is defined aswww.bzxz.net
where: 81, 82, 8 are the air gap values measured at 120° apart, 0. 55
4.23The motor has a cylindrical shaft extension. If the two parties have another agreement, the motor is allowed to be made into two shaft extensions. The second shaft extension should be able to transmit the rated power, but it can only be driven by a coupling.
4.24The non-shaft extension end of the motor is allowed to be equipped with a silencer. 44
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