JB/T 7840-1995 Technical specifications for YZRW series eddy current brake wound rotor three-phase asynchronous motors for hoisting and metallurgy
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T 7840-1995
Technical conditions for YZRW series eddy current brake wound rotor three-phase asynchronous motors for lifting and metallurgy
Issued on November 24, 1995
Ministry of Machinery Industry of the People's Republic of China
Implementation on June 1, 1996
Mechanical Industry Standard of the People's Republic of China
Technical conditions for YZRW series eddy current brake wound rotor three-phase asynchronous motors for lifting and metallurgy
1 Subject content and scope of application
JB/T7840-1995
Replaces JB/DQ31971987
This standard specifies the terminology, type, basic parameters and dimensions, technical requirements, inspection rules, marking and packaging requirements of YZRW series eddy current brake wound rotor three-phase asynchronous motors for lifting and metallurgy. This standard applies to eddy current brake wound rotor three-phase asynchronous motors for electric transmission of various lifting machinery and metallurgical auxiliary equipment (hereinafter referred to as eddy current brake motors and eddy current brakes). All motors derived from this series of eddy current brake motors can be used as a reference. 2
Referenced Standards
GB75587
GB756—90
GB/T75793
GB997—81
GB1032—85
B1096-79
GB/T1993-93
GB 4772.1-84
GB4826—84
GB 4942.1-84
GB10069-88
GB 12665--90
GB191—90
JB241978
JB/Z294—87
JB/Z346-89
3Terms
Basic technical requirements for rotating electrical machines
Rotating electrical machines
Cylindrical shaft extension
Conical shaft extension for rotating electrical machines
Motor structure and installation type code
Test methods for three-phase asynchronous motors
Ordinary flat key
Cooling methods for rotating electrical machines||tt| |Motor dimensions and tolerances
Motor power rating
Motor housing protection classification
Methods and limits for measuring noise of rotating motors
Motor damp heat test requirements for use under normal environmental conditions Packaging, storage and transportation pictorial symbols
Outdoor small and medium-sized asynchronous motors
Test methods for insulation between loosely embedded windings of AC low-voltage motors Test limits for insulation between loosely embedded windings of AC low-voltage motors 3.1 Rated braking torque: The braking torque of the eddy current brake when the excitation winding is thermally stable at 100r/min. 3.2 Limited braking torque: Eddy current The braking torque of the brake when the excitation winding is thermally stable at 950~1000r/min. 3.3 Rated excitation current: the reversing current that can meet the rated braking torque and limit the braking torque. 4 Types, basic parameters and dimensions
4.1 Eddy current brake motors are divided into: eddy current brake motors for general environments, whose housing protection level is IP44; eddy current brake motors for metallurgical environments, whose housing protection level is IP54; the protection level of eddy current brakes is IP00 (see GB4942.1). 4.2 Eddy current brake motor cooling method: 112~132 The frame number is IC0041, and the frame number of 160~280 is IC0141 (see GB/T1993).
Approved by the Ministry of Machinery Industry on November 24, 1995
Implemented on June 1, 1996
JB/T7840-1995
4.3 The working system of eddy current brake motor is divided into S3, S4, and S5 (S4 and S5 allow 300 times/h), the basic working system is S3 (see GB755), the basic load duration rate is 40%, and the basic load duration rate of eddy current brake is 15%. 4.4 The structure and installation type of eddy current brake motor are IM1001, IM1003, IM3011, and IM3013 (see GB997), and are manufactured according to the provisions of Table 1.
Structure and installation type
IM1001
IM1003
IM3011
IM3013
Manufacturing range (frame size)
112~160
180~280
112~160
180~225
The rated power of eddy current brake motor in standard working system S3-40% is manufactured according to the following values: 1.5, 2.2, 3.75.5, 7.5, 11, 4.5
15, 22, 30, 37, 45, 55, 75kW. The rated braking torque of the eddy current brake at the rated speed of 100r/min is manufactured according to the following values: 7, 18, 64, 118, 170, 235, 390, 590N·m. 4.6 The rated frequency of the eddy current brake motor is 50Hz, the rated voltage is 380V, and the stator winding is Y-connected. According to user requirements, the eddy current brake motor with Y connection can add a zero point lead. 4.7 The rated power of the eddy current brake motor in the standard working system, the rotor moment of inertia Jml, the open-circuit voltage of the rotor winding and the rated braking torque and limited braking torque of the eddy current brake, the moment of inertia of the armature Jm2 and the frame number shall comply with the provisions of Table 2. The tolerance of the open-circuit voltage of the rotor winding: 112~250 frame number is ±7.5%, and 280 frame number is ±10%. 4.7.1
4.7.2 The tolerance of the moment of inertia is +10%. bzxz.net
4.7.3 The power supply of the eddy current brake excitation winding is DC, and the rated excitation voltage is 80±15V. If the user needs it, it can also be made into 160±30V. The dimensions and tolerances of the eddy current brake motor (see GB4772.1). 4.8
The installation dimensions and tolerances of the eddy current brake motor shall comply with the provisions of Table 3 and Table 4. The external dimensions are not greater than those specified in Table 3 and Table 4.
Frame size
Rotor open-circuit voltage
Rotor open-circuit voltage
Rotor open-circuit voltage
112M132M.132M160M160M.
225M250M250M2
Eddy-current brake motor
Eddy-current brake
Rated braking torque
Rated speed
Limited braking torque
kg·m?
JB/T7840-1995
Continued Table 2
112M132M,
2160M，160M2
According to user needs, the exhaust-current brake on the current-adjusting brake motor may not be matched according to the corresponding relationship in the table.
1250M, 250M2
The dimensions and tolerances of the shaft extension key of the eddy current brake motor (see GB1096) shall comply with the provisions of Table 5. 390
279121
If the K-type is qualified, A/2 will not be assessed. Note: 1
2》The extreme deviation of the C-type is included in the shaft movement. The medical equipment shall be carried out in accordance with the provisions of GB/T757, Table 3IM1001 and IM1003
Specialized for weak late brake motors without convex dimensions
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Table 4 TM3011 and IM3013 vertical installation, base without feet, end cover with flange, shaft downward weak current brake motor requirements
Basic brush basic high cost
Size state temporary difference size #
National shape screen connection GB/T 757, Note: 1)
P is the maximum dimension,
±0.5d 1050. 45 16
R is the distance from the flange to the flange, and its limit deviation includes the maximum extension diameter D
Kili drum limit
Kili limit
215180
100350
±0.018454
Pinli Extreme Car Micro Exhibition
Position
Original letter pad state editing
JB/T7840-1995
The radial round runout tolerance of the eddy current brake motor at half of the shaft extension length shall not be greater than the provisions of Table 6. Table 6
Gentleman diameter D
>30~50
>50~80
>80~120
Radial round runout tolerance
JB/T7840
JB/T7840-1995
18-80.043
The radial round runout tolerance of the eddy current brake motor at half of the shaft extension length shall not be greater than the provisions of Table 6. Table 6
Clock diameter
>30~50
>50~80
>80~120
Radial runout tolerance
The radial runout tolerance of the flange stop to the axis of the eddy current brake motor and the end face runout tolerance of the flange mating surface to the axis of the eddy current brake motor shall not exceed the provisions of Table 7. Table 7
Flange code
FF215~265
FF300~500
Radial and end face runout tolerance
The parallelism tolerance of the axis of the eddy current brake motor to the base support plane shall not exceed the provisions of Table 8. Table 8
112~250
Parallelism tolerance
The flatness tolerance of the base support plane of the eddy current brake motor shall not exceed the provisions of Table 9. Table 9
Maximum dimension of the distance between the outer edges of the base (AB or BB)>160~250
>250~400
>400~630
The symmetry tolerance of the keyway of the shaft extension of the eddy current brake motor shall not be greater than that specified in Table 10. Flatness tolerance
Technical requirements
JB/T7840-1995
Symmetry tolerance
Eddy current brake motors shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 5.2 Eddy current brake motors shall be able to ensure normal operation when used under the following conditions. mm
5.2.1 The altitude shall not exceed 1000m. If the eddy current brake motor is specified to be used at an altitude exceeding 1000m, it shall be handled in accordance with the provisions of 5.3.4 in GB755.
Ambient air temperature; generally the ambient air temperature shall not exceed 40℃, and the metallurgical ambient air temperature shall not exceed 60℃. If the eddy current brake motor is specified to be used in an ambient air temperature higher or lower than the above specified value, it shall be handled in accordance with the provisions of 5.3.4 of GB755. 5.2. 3
The minimum ambient air temperature is -15℃C.
The monthly average maximum relative humidity in the wettest month is 90%, and the monthly average minimum temperature in that month is not higher than 25℃. Indoor use.
Frequent mechanical vibration and impact.
Frequent starting and braking.
The deviation of the power supply voltage and rated power from the rated value during the operation of the eddy current brake motor shall comply with the provisions of 4.3 of GB755. 5.3
When the eddy current brake motor is started, the rotor must be connected in series with an additional resistor or reactance to limit the average value of the starting current to no more than 2 times the rated current.
5.5 The eddy current brake motor adopts coupling or spur gear transmission. If spur gear transmission is adopted, the gear pitch diameter shall not be less than 2 times of the shaft extension diameter.
5.6 The guaranteed value of the ratio of the maximum torque to the rated torque of the eddy current brake motor under rated voltage and standard working system shall not be less than the provisions of Table 11.
The maximum torque tolerance is 10% of the guaranteed value. 5.7
Maximum torque Tb/rated torque
The insulation grades of eddy current brake motors are F and H. F-class insulated eddy current brake motors are suitable for places where the ambient air temperature does not exceed 40C, and H-class insulated eddy current brake motors are suitable for places where the ambient air temperature does not exceed 60C. When the altitude and ambient air temperature meet the requirements of Article 5.2, the temperature rise limit or allowable temperature of each heating part of the eddy current brake motor shall not exceed the provisions of Table 12. However, its temperature limit shall not exceed 120℃.
The collector ring of the eddy current brake motor is allowed to use Class B insulation, 7
Heating parts of eddy current brake motor
Winding temperature rise (resistance method)
[C0041
IC0141
Collector ring temperature rise (thermometer method)
Bearing allowable temperature (thermometer method)
Eddy current brake armature surface maximum temperature (thermometer method)JB/T7840-1995
F class insulation
150℃
H class insulation
115℃
150℃
Note: The allowable bearing temperature refers to the value at the ambient air temperature specified in Article 5.2. When measured at an ambient air temperature lower than the specified ambient air temperature, the bearing temperature should be the difference between the measured temperature plus the specified ambient air temperature and the actual ambient temperature. 5.9
When the three-phase power supply is balanced, the deviation of any phase of the three-phase no-load current of the eddy-current brake motor from the three-phase average value should not be greater than 10% of the three-phase average value.
5.10The insulation resistance of the stator and rotor windings of the eddy-current brake motor should not be lower than the value obtained by the following formula in the hot state. R,
In formulas (1) and (2): R, stator winding insulation resistance, MO; U, stator rated voltage, V,
R, rotor winding insulation resistance, Ma;
Us-rotor winding open circuit voltage, V;
P-rated power of the eddy-current brake motor, kW. The insulation resistance of the eddy-current brake excitation winding should not be lower than 1MO in the hot state. (1)
The stator and rotor windings of the eddy current brake motor and the excitation winding of the eddy current brake shall be able to withstand the insulation withstand voltage test 5.11
for 1 minute without breakdown. The frequency of the test voltage is 50Hz and it should be a sine wave as much as possible. The effective value of the test voltage is: 1000V plus 2U for the stator, 1000V plus 4U+ for the rotor, and 1500V plus 2 times the rated excitation voltage for the eddy current brake excitation winding. 5.12 The eddy current brake motor shall be able to withstand the maximum torque value specified in Article 5.6 of this standard (allowing tolerance) for 15 seconds in the hot state and with gradually increasing torque. There shall be no sudden change in speed, stalling or harmful deformation. At this time, the voltage and frequency shall maintain the rated value. 5.13 The maximum speed allowed for the eddy current brake motor is 2.5 times its synchronous speed. When the eddy current brake motor is unloaded and the eddy current brake excitation winding has no excitation current, it should be able to withstand an overspeed test of 120% of the maximum speed for 2 minutes. After the overspeed test, there should be no permanent abnormal deformation and no other defects that hinder the normal operation of the eddy current brake motor. If the rotor winding can meet the requirements of the withstand voltage test in 5.11 after the overspeed test, it is qualified.
5.14 The scattered wire winding of the eddy current brake motor should be able to withstand the inter-insulation withstand voltage test without breakdown. The peak value of the impulse voltage shall be in accordance with the provisions of JB/Z364, and the test method shall be carried out in accordance with the provisions of JB/Z294. The formed winding should be able to withstand a short-term voltage increase test without failure. The test is carried out when the rotor is stationary and the rotor is open. The external applied voltage of the test is 130% of the rated voltage. It lasts for 3 minutes, and the frequency is allowed to be increased during the test. 5.15 The stator and rotor windings of the eddy current brake motor shall be subjected to 6 cycles of 40℃ alternating damp heat test. After the test, the insulation resistance shall not be lower than the requirements of 5.10, and shall be able to withstand the voltage withstand test specified in 5.11 without breakdown. The effective value of the test voltage is 1500V. 5.16 The rotor of the eddy current brake motor shall be dynamically balanced and the armature shall be statically balanced. The noise value of the A-weighted sound power level measured when the eddy current brake motor is unloaded (the eddy current brake is not excited) shall not exceed the value specified in the grade of Table 13 of 5.17 when ordering.
JB/T7840-1995
Synchronous speed
750 and 600
The unevenness of the air gap between the rotor and the armature and the magnetic pole of the eddy current brake shall not be greater than the requirements of Table 14. Eddy current brake motor is fixed,
8-the basic size of the air gap;
where:
-the uneven value of the air gap,
which is defined as:
/8,+8+82-8,82-0-8,0
.RPPEPORE
In formula (3): 8,
32,§ are the air gap values measured at a distance of 120°. 14
The stator terminal box of the eddy current brake motor is located at the top of the base, and the wires can be led out along the two sides of the eddy current brake motor. The rotor and eddy current brake excitation winding can lead out from both sides of the end cover and should be securely fixed. 5.20
The fastening bolts on the eddy current brake motor must have anti-loosening measures. The shaft extension key of the eddy current brake motor, the operating and maintenance instructions (at least one copy is provided to a user for a batch of eddy current brake motors of the same model) and the product certificate are provided to the user together with the eddy current brake motor. Six spare brushes are randomly provided with each exhaust current brake motor. If the user uses and stores the eddy current brake motor correctly according to the provisions of the operating and maintenance instructions, the manufacturer shall guarantee that the eddy current brake motor can operate well within one year of use, but no more than two years from the date of shipment from the manufacturer. If the eddy current brake motor is damaged or cannot work properly due to poor manufacturing quality within this specified time, the manufacturer shall repair and replace parts or eddy current brake motors for the user free of charge.
The junction box of the eddy current brake motor should be equipped with an internal grounding terminal, and there should be a grounding mark near the grounding terminal that is guaranteed to be indelible during the entire service life of the eddy current brake motor.
Eddy current brake motors can be made into outdoor types according to the provisions of JB2419. 9
6 Inspection rules
JB/T7840-1995
6.1Each eddy current brake motor must be inspected and qualified before it can be shipped, and a product certificate should be attached. 6.2 Each eddy current brake motor shall be inspected and tested. The inspection and test items include: a. Mechanical inspection (according to the provisions of 6.3); b. Determination of insulation resistance of stator, rotor windings and eddy current brake excitation winding to the housing (cold insulation resistance can be measured during the inspection test, but the hot insulation resistance should be guaranteed not to be lower than the provisions of 5.10); determination of DC resistance of stator, rotor windings and exhaust current brake excitation winding under actual cooling state; c. Determination of open circuit voltage of rotor winding; stator and rotor winding inter-turn insulation impulse withstand voltage test: f. Determination of no-load current and loss; winding phase-to-phase and winding and eddy current brake excitation winding to the housing withstand voltage test. When the eddy current brake motor has only three leads, the winding phase-to-phase test is allowed to be carried out when it is a semi-finished product; h. After the eddy current brake excitation winding is thermally stable, At 100r/min, the rated braking torque, excitation voltage and excitation current are measured; i. Noise measurement.
6.3 Mechanical inspection of eddy current brake motors includes, 8. Rotation inspection: When the eddy current brake motor rotates, it should be smooth and light without stagnation; b. Appearance inspection: Check whether the assembly of the eddy current brake motor is complete and correct, the surface paint should be completely dry, without stains, damage, cracks and other defects
c. Inspection of installation dimensions, external dimensions and key dimensions; d. Inspection of the circular runout of the shaft extension, flange stop and flange end face, the flatness of the base support plane, the parallelism of the axis to the base support plane and the symmetry of the keyway. The flatness of the base support plane and the key symmetry are allowed to be inspected on the components; e.|| tt||Check the contact between the brush and the collector ring: The brush and the collector ring should be in good contact. 6.4 Type tests must be carried out in any of the following situations: the first trial production or small batch trial production by the manufacturer after identification and finalization; a.
When the design or process changes are sufficient to cause changes in certain performance and parameters; b.
When the inspection test results deviate unacceptably from the previous type test results; c.
Eddy current brake motors produced in batches should be regularly tested, and the test time should be once a year. When the number of tests required is too large, the test interval can be appropriately extended, but at least once every two years. 6.5 Type test items for eddy current brake motors include: 8|| tt||All items of inspection and testing:
Efficiency and power factor determination;
Short-time over-torque test;
Overspeed test;
Maximum torque determination;
Torque-slip curve determination;
No-load characteristic curve measurement:
Temperature rise test: Eddy current brake motor is subjected to temperature rise test at power of S3-40% of the reference working system; Eddy current brake is subjected to temperature rise test at rated braking torque and rated excitation current at S3h.
15% (test method see Appendix A). Determination of rotation amount;
Shell protection grade test;
Air gap unevenness inspection;
Alternating damp heat test;5 Type test items of eddy current brake motor include: 8
All items of inspection test:
Efficiency and power factor determination;
Short-time overtorque test;
Overspeed test;
Maximum torque determination;
Torque-slip curve determination;
No-load characteristic curve measurement:
Temperature rise test: Eddy current brake motor is tested for temperature rise at the power of S3-40% of the reference working system; Eddy current brake is tested for temperature rise at S3h.
15% at rated braking torque and rated excitation current (see Appendix A for test method). Determination of rotation amount;
Shell protection grade test;
Air gap unevenness inspection;
Alternating damp heat test;5 Type test items of eddy current brake motor include: 8
All items of inspection test:
Efficiency and power factor determination;
Short-time overtorque test;
Overspeed test;
Maximum torque determination;
Torque-slip curve determination;
No-load characteristic curve measurement:
Temperature rise test: Eddy current brake motor is tested for temperature rise at the power of S3-40% of the reference working system; Eddy current brake is tested for temperature rise at S3h.
15% at rated braking torque and rated excitation current (see Appendix A for test method). Determination of rotation amount;
Shell protection grade test;
Air gap unevenness inspection;
Alternating damp heat test;
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