This standard specifies the type, basic parameters and dimensions, technical requirements, inspection rules, marking and packaging requirements of YZRF, YZRG series forced ventilation three-phase asynchronous motors for lifting and metallurgy. JB/T 7078-2002 Technical conditions for YZRF, YZRG series forced ventilation three-phase asynchronous motors for lifting and metallurgy JB/T7078-2002 Standard download decompression password: www.bzxz.net

ICS29.160.30
(D)a EEAn1 2 0 11 U>UDBEO+e ×/YZRFc YZRG
2002-07-164
JB/T 70782002
JB/T707891993
2002-12-01
JB/T 7078—2002
This standard replaces JB/T7078-—1993 "Technical requirements for YZRF, YZRG series forced ventilation wound rotor three-phase asynchronous motors for lifting and metallurgical use".
Compared with JB/T7078—1993, the main changes of this standard are as follows: The referenced documents are revised to indicate the date and the latest version is cited: - The numerical rounding rules are added:
The foot thickness dimension is added.
Appendix A of this standard is a normative appendix.
This standard is proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Technical Committee for Standardization of Rotating Electric Machines, the Hoisting Metallurgy and Shielded Motor Standardization Sub-Technical Committee (SAC/TC26/SC4).
The drafting units of this standard are: Jiamusi Explosion-proof Motor Research Institute, Shunde Desheng Motor Co., Ltd., Jiamusi Motor Co., Ltd. The main drafters of this standard are: Tan Yulin, Zhang Shiping, Pu Jifeng, Zhang Chenglong. The previous versions of the standards replaced by this standard are: JB/DQ3199-1987:
-JB/T7078—1993.
1 Scope
JB/T7078—2002
Technical conditions for YZRF, YZRG series forced ventilation wound rotor three-phase asynchronous motors for lifting and metallurgy This standard specifies the types, basic parameters and dimensions, technical requirements, inspection rules, marking and packaging requirements of YZRF, YZRG series forced ventilation wound rotor three-phase asynchronous motors for lifting and metallurgy. This standard applies to forced ventilation wound rotor three-phase asynchronous motors (hereinafter referred to as motors) for electrical transmission of various lifting machinery and metallurgical auxiliary equipment.
Relevant contents not specified in this standard can refer to the provisions of JB/T10105—1999. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any un-dated referenced documents, the latest version shall apply to this standard. GB/T191-2000 Packaging, storage and transportation pictorial symbols (eqvISO780:1997) GB755-2000 Rotating motor ratings and performance (idtIEC60034-1:1996) GB/T757-1993 Rotating motor tapered shaft extension GB/T997--1981 Motor structure and installation type code (negIEC60034-7:1972) GB/T1032-1985 Three-phase asynchronous motor test method GB/T1096-1979, ordinary flat key type size GB/T1993-1993 Rotating motor cooling method 3 Basic environmental test procedures for electrical and electronic products Test Db: Alternating damp heat test method (eqvIECGB/T2423.4-1993
60068-2-3:1980)
GB/T 4772.1--1999
Dimensions and output power classes of rotating electrical machines Part 1: Frame sizes 56 to 400 and flange sizes 55 to 1080 (idtIEC60072-1:1991)
GB/T4942.1--2001
Classification of protection of rotating electrical machines by enclosures (IP code) (idtIEC60034-5:1991) GB10068--2000 Mechanical vibration of electrical machines with a shaft center height of 56 mm or more - Measurement, evaluation and limits of vibration (idtIEC60034-14:1996)
GB10069.3-1988 Rotating electrical machines Noise determination method and limit Noise limit (neqIEC60034-9) GB14711--1993 General safety requirements for small and medium-sized rotating electrical machines (neqIEC60034-1) JB/T9615.1--2000 Test method for inter-turn insulation of scattered windings of AC low-voltage motors JB/T9615.2-2000 Test limit for inter-turn insulation of scattered windings of AC low-voltage motors JB/T10105-1999 Technical conditions for YZR series three-phase asynchronous motors with winding rotors for hoisting and metallurgy 3' Type, basic parameters and dimensions
3.1 The motors are divided into two types: YZRF series with built-in fans and YZRG series duct ventilation types. 3.2 The protection level of the motor housing is IP23, and the protection level of the junction box is IP54 (see GB/T4942.1-2001). 3.3 Motor cooling method: IC15 for YZRF series and IC17 for YZRG series (see GB/T1993-1993). 3.4 The structure and installation type of the motor are IM1003 and IM1004 (see GB/T997-1981), and are manufactured according to the provisions of Table 11
JB/T70782002
3.5 The motor's duty system is S1, and it is manufactured according to the power listed in Table 2. The motor can also be manufactured in S2, S3, S4, S5, S6, S7, S8 and S9 duty systems (see GB755--2000) when required by the user. Table 1
Structure and installation type
Frame size
1000r/min
Rated power
750r/min
IM1003
IM1004
600r/min
Manufacturing range (frame size)
250~400
Air volume for shelter from people
Total air pressure for people
Pa/mmH2O
500/50
600/60
700/70
900/90
Note: 1 and 2 after M and L represent different powers under the same frame size and speed respectively: Intake air volume and air pressure are only for YZRG series duct ventilation type motors.
3.6 The rated frequency of the motor is 50Hz and the rated voltage is 380V. The stator winding of the motor with power of 132kW or less is Y-connected, and that of the motor with power greater than 132kW is △-connected. According to user requirements, the zero point lead wire can be added to the motor with Y-connection method. 3.7 The user shall provide the air supply duct for the YZRG series duct ventilation type motor, and the air supply shall be in accordance with the air volume and air pressure specified in Table 2: For the YZRF series self-contained fan type motor, the manufacturer shall provide the fan and filter. The fan used with the motor has a rated frequency of 50Hz and a rated voltage of 380V. When the ambient air temperature is 60℃, the temperature rise limit shall not exceed the provisions of GB755-2000. 3.8 The corresponding relationship between the rated power, rotor moment of inertia Jm, rotor winding open circuit voltage and machine frame number of the motor shall comply with the provisions of Table 3. 3.8.1 Rotor winding open circuit voltage tolerance: ±7.5% for frame size 250, ±10% for frame size 280~400. 3.8.2 The tolerance of the moment of inertia is +10%
1000r/min
3.9 Dimensions and tolerances of the motor:
Rotor winding
Open circuit voltage
750r/min
Rotor winding
Open circuit voltage
JB/T7078—2002
600r/min
3.9.1 The installation dimensions and tolerances of the motor shall comply with the provisions of Table 4 and Table 5 (see GB/T4772.1-1999).
The radial runout tolerance at half the motor shaft extension shall not be greater than that specified in Table 6. 3.9.2
The symmetry tolerance of the motor shaft keyway shall not exceed the provisions of Table 7. 3.9.3
The parallelism tolerance of the motor axis to the foot support surface shall not exceed the provisions of Table 8. 3.9.5
The flatness tolerance of the motor foot support surface shall not exceed the provisions of Table 9. 3.9.6
The dimensions and tolerances of the motor shaft key shall comply with the provisions of Table 10 (see GB/T1096-1979) Technical Requirements
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. 4.2 The motor shall be able to operate at rated speed when used under the following conditions. Rotor winding
Open circuit voltage
The overall dimensions shall not be larger
4.2.1 The altitude shall not exceed 1000m. If the motor is specified to be used at an altitude exceeding 1000m, it shall be handled in accordance with the provisions of GB755-2000. 4.2.2 Ambient air temperature:
4.2.2.1 Maximum ambient air temperature: The cooling air temperature sent by the duct for duct-ventilated motors shall not exceed 40℃: The motors with built-in fans can be divided into: general environment, whose ambient air temperature shall not exceed 40℃; metallurgical environment, whose ambient air temperature shall not exceed 60℃.
4.2.2.2 The minimum ambient air temperature is -15℃. If the motor is specified to be used in an ambient air temperature higher or lower than the above provisions, it shall be handled in accordance with the provisions of GB755-2000.
4.2.3 The average maximum relative humidity of the wettest month is 90%, and the average minimum temperature of the month is not higher than 25℃. 4.2.4 Indoor use.
4.2.5 Frequent starting, braking (electrical or mechanical) and reversing. 4.2.6
Frequent mechanical vibration and shock.
JB/T7078-—2002
"If the position of K hole is qualified, A/2 can be exempted from examination. The axial deviation of C dimension includes the movement of shaft." The tapered shaft extension shall be inspected according to the provisions of GB/T757-—1993 4
Figure 1 YZRF series lifting and metallurgy
with built-in fan type motor
Installation size
Basic limit Basic
[Dimensions
and tolerances
Basic limit
Basic limit
Position bone
JB/T7078-—2002
Unit: mn
1 8652120
JB/T7078-2002
Basic limit
216±4.0600
: If the position of the hole is qualified, A/2 can be exempted from examination. The axial deviation of the *c dimension includes the movement of the shaft. The circular axial extension shall be inspected in accordance with the provisions of GB/T757-1993. Basic
Figure 2 YZRG series lifting and metallurgy
duct ventilation type motor
installation dimensions and
basic limit basic
M80×4210
basic, limit
dimensional deviationwww.bzxz.net
basic limit
300 165360100130160
850185400120|150186
JB/T7078—2002
Unit: mm
Overall dimensions
Basic limit position bolt ABACBBHAHD size
Tolerance
Difference diameter
515480|510|30
11951337
575535
640620
740710
+0.622.5@
840|910:45
12651438
13 151489
13901562
14401613
16501864
17201934
18652120
JB/T7078—2002
Shaft extension diameter D
>80~120
>120～130
Shaft extension diameter D
Shaft center height H
>250~400
Maximum dimension of the distance between the outer edges of the base (AB or BB)>400~630
>630～1000
Shaft extension diameter D
Keyway width F
22 -0.052
Radial runout tolerance
Unit: mm
Unit: mm
Symmetry tolerance
Unit: mm
Parallelism tolerance
Unit: mm
Flatness tolerance
Unit: mm
4.3 The deviation between the power supply voltage and frequency and the rated value during the operation of the motor shall comply with the provisions of GB755--2000. 160.110
4.4 When the motor is started, the rotor must be connected in series with an additional resistor or reactance to limit the average starting current to no more than twice the rated current of various working systems.
4.5 The motor adopts coupling or spur gear transmission. When using spur gear transmission, the pitch circle diameter should not be less than 2 times the shaft extension diameter. 4.6 The guaranteed value of the ratio of the maximum torque to the rated torque of the motor under rated voltage and standard working system is 2.8 times, and the numerical rounding interval is 0.1.
The tolerance of the maximum torque multiple is -10% of the guaranteed value. 4.7
JB/T7078—2002
4.8YZRG series duct ventilation motors use F and H grade insulation, and the ambient air temperature does not exceed 40C. YZRF series self-contained fan motors are divided into F and H grades according to different use environments. F grade insulation motors are suitable for places where the ambient air temperature does not exceed 40℃: H grade insulation motors are suitable for places where the ambient air temperature does not exceed 60℃. When the altitude and ambient air temperature meet the requirements of 4.2, the temperature rise limit and allowable temperature of each heating part of the motor shall not exceed the requirements of Table 11, and the numerical rounding interval is 1. The collector ring of the motor is allowed to use Class B insulation, but its temperature limit shall not exceed 120℃. If the altitude or ambient air temperature of the test site is different from that specified in 4.2, the temperature rise limit shall be revised according to the provisions of GB755-2000. Table 11
Heating parts of the motor
Winding temperature rise (resistance method)
Collector ring temperature rise (thermometer method)
Bearing allowable temperature (thermometer method)
F-class insulation
Ambient air temperature 40℃
H-class insulation
115℃
Ambient air temperature 60℃
H-class insulation
115℃
Note: The allowable bearing temperature refers to the value at the ambient air temperature specified in 4.2. When measured at an ambient air temperature lower than the specified ambient air temperature, the bearing temperature shall be the difference between the measured temperature plus the specified ambient air temperature and the actual ambient temperature. 4.9 When the three-phase power supply is balanced, the deviation of any phase of the motor's three-phase no-load current from the three-phase average value should not be greater than 10% of the three-phase average value.
4.10 The insulation resistance of the motor winding should not be lower than the value obtained by the following formula in the hot state. R,
1000+P/100
1000+P/100
Where:
R——stator winding insulation resistance, unit is MQ; R2—rotor winding insulation resistance, unit is M2: Ui is the stator rated voltage, unit is V:
U2——rotor winding open circuit voltage, unit is V: - motor rated power, unit is kW. (1)
4.11 The motor winding should be able to withstand an insulation withstand voltage test lasting 1 minute to ground without breakdown. The test voltage frequency is 50Hz and is as sinusoidal as possible. Voltage effective value: stator winding is 1000V+2U1, rotor winding is 1000V+4U2. 4.12 The loose wire winding of the motor should be able to withstand the inter-turn insulation impulse voltage test without breakdown, and its impulse voltage peak value shall comply with the provisions of JB/T9615.2-2000.
The molded winding should be able to withstand the short-term voltage increase test without failure. The test is carried out when the rotor is stationary and the rotor is open-circuited. The external voltage of the test is 130% of the rated voltage for 3 minutes. The frequency is allowed to be increased during the test. 4.13 The motor should be able to withstand the short-term over-torque test of the maximum torque value (allowed to take into account tolerance) specified in 4.6 when it is hot and the torque is gradually increased. It lasts for 15 seconds without sudden speed change, stalling and harmful deformation. At this time, the voltage and frequency should maintain the rated value. 4.14 The maximum speed allowed by the motor is 2.5 times its synchronous speed. When the motor is unloaded, it should be able to withstand an overspeed test of 1.2 times the maximum speed for 2 minutes. After the overspeed test, if the rotor does not have harmful deformation and can meet the requirements of the withstand voltage test in 4.11, it is qualified. 4.15 The effective value of the vibration intensity measured when the motor is no-load should not exceed 3.5mm/s, and the numerical rounding interval is 0.1. 4.16 The unevenness of the motor air gap should not be greater than the provisions in Table 12. 4.17 The noise limit of the A-weighted sound power level measured when the motor is unloaded shall not exceed the value specified in the grade selected in Table 13 when ordering, and the value rounding interval is 1.
4.18 The motor winding needs to undergo a 6-cycle 40℃ alternating damp heat test (see GB/T2423.4-1993). After the test, the insulation resistance shall not be lower than the requirements of 4.10, and shall be able to withstand the withstand voltage test specified in 4.11 without breakdown, but the effective value of the test voltage is 1500V. 1
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