This standard specifies the type, basic parameters and technical inspection rules of large AC three-phase synchronous motors for mining mills. This standard applies to large AC three-phase synchronous motors for mining mills (hereinafter referred to as motors). Matters not specified in this standard shall comply with the relevant provisions of GB/T755. JB/T 1473-2000 Technical conditions for large AC three-phase synchronous motors for mining mills JB/T1473-2000 Standard download decompression password: www.bzxz.net

People's Republic of China Pressurized Machinery Industry Standard JB/T14732000
2000-04-24 4
2000-10-01
JB/T1473±2000
This standard is a revision of JB1473-74. e
This standard is the technical criteria for the design, use and manufacture of large AC three-phase synchronous motors for mining mills. The main differences between its technical content and JB1473-74 are as follows:
- The expression rules are modified according to GB/T1.1-1993 and GB/T1.3--1997:- The rated voltage of 10000V is added:
- The temperature rise limit of F-class insulation is added;
Some clauses are amended or necessary supplemented and modified. This standard replaces JB1473-74 from the date of implementation. This standard is proposed and managed by Harbin Large Electric Motor Research Institute. This standard is drafted by Harbin Large Electric Motor Research Institute, and Shanghai Electric Motor Factory Co., Ltd., Dongfang Electric Motor Co., Ltd., and Harbin Electric Motor Factory Co., Ltd. participated in the drafting. The main drafters of this standard are Yang Ming, Qu Fengbo, Jin Xuan, Fan Jianshan, and Shen Jinxiang. This standard is interpreted by Harbin Large Electric Motor Research Institute. 1
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JB/T14732000
JB14731974
This standard specifies the type, basic parameters, and technical inspection rules of large AC three-phase synchronous motors for mining mills. This standard applies to large AC three-phase synchronous motors for mining mills (hereinafter referred to as motors). Matters not specified in this standard shall comply with the relevant provisions of GB/T755. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest version of the following standards. GB191—1990
GB755--2000
GB/T 997—1981
GB/T1029—1993
GB/T1993-1993
GB/T4942.1-1985
GB/T10068.1-1988
Packaging, storage and transportation pictorial symbols (neqISO780:1985) Rotating electrical machines—Ratings and performance (idtIEC60034—1) Motor structure and installation type code (engEC60034—7:1972) Three-phase synchronous motor test method (negIEC60034—2) Rotating electrical machine cooling method (eqvIEC60034—6:1991) Motor housing protection Grade (eqvIEC60034-5:1981) Rotating motor vibration measurement method and limit vibration measurement method (neqEC60034--14:1986) GB/T10069.2--1988
3 Rotating motor noise measurement method and limit noise simple measurement method (neqIso1680-1~2:1986)
3 Type, basic parameters and dimensions
3.1 Motor model representation method
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Power kw
Synchronous motor for grinding mill
3.2 The motor housing protection level is IP00 (see GB/T4942.1). 3.3 The motor cooling method is IC01 (see GB/T1993). 3.4 The structure and installation type of the motor is IM7311 (see GB/T997), 2000-04-24
2000-10-01 Tong
JB/T14732000
3.5 The rating of the motor is continuous rating S1 (see GB/T755). 3.6 The rated frequency of the motor is 50Hz, the rated voltage is 6000V or 10000V, and the rated power factor is 0.9 (leading). 3.7 The corresponding relationship between the model of the motor and the speed and power should comply with the provisions of Table 1. Table 1
TM400—32
TM500-36
TM630—36
TM800—36
TM1000-36
TM1250—40
Rated power kw
Speed ​​r/min
3.8 The installation dimensions of the motor shall comply with the provisions of Figure 1, Table 2, Figure 2 and Table 3. It can be manufactured into other shapes under the condition that the spatial dimensions remain unchanged.
4 Technical requirements
4.1 The motor shall be able to operate at rated speed under the following conditions. 4.1.1 The sea level shall not exceed 1000m.
4.1.2 The ambient temperature varies with the seasons, but shall not exceed 40℃. Note: If the motor is specified to be used at an altitude of more than 1000m or the ambient air temperature is higher than 40C, it shall comply with the provisions of GB755. 4.1.3 The operating environment is required to be dust-free and free of corrosive gases such as acid and alkali. 4.2 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. 4.3 When the power, voltage, frequency and power factor are rated values, the guaranteed value of the motor efficiency shall comply with the provisions of Table 4. 2
JB/T14732000
2900-0
290000
658802
5188:0s
688-02
210'0+
518800
JB/T14732000
D6909E
TM400 -32
TM500—36
TM630—36
TM800--36
TM1000—36
TM1250—40
JB/T1473±2000
Rate (%)
4.4At rated voltage, the guaranteed value of the ratio of the motor's stall torque to the rated torque is 1.7 times. 4.5At rated voltage, the guaranteed value of the ratio of the motor's nominal pull-in torque to the rated torque is 1.0 times. 4.6At rated voltage, the guaranteed value of the ratio of the motor's stall torque to the rated torque is 2.0 times. 4.7At rated voltage, the guaranteed value of the ratio of the motor's stall current to the rated current is 7.0 times. 4.8 The tolerance of the guaranteed value of motor performance shall comply with the following provisions: a) Efficiency n
b) Stall current
c) Stall torque
d) Loss of step torque
e) Nominal pull-in torque
-0.10 (1 -- n );
+20% of guaranteed value;
-15% of guaranteed value;
-10% of guaranteed value;
-15% of guaranteed value.
4.9 Under rated operating conditions, the temperature rise limits of various heating parts of the motor are shown in Table 5. Table 5
Stator winding
Rotor winding
Stator core
Collector ring
Insulation grade
Bearing (oil outlet temperature does not exceed 65℃)
Temperature rise limit
Note: When the operating conditions and test location are different from the regulations, the temperature rise limit shall be corrected according to GB/T755. Measurement method
Resistance method
Thermometer method
4.10 When the motor is no-load, the speed reaches 120% of its rated value for 2 minutes without harmful deformation. 4.11
The insulation resistance of the motor winding in the hot state or after the temperature rise test shall not be lower than the value obtained by the following formula. R
1000+P/100
Wherein: R—
-insulation resistance of motor winding, M;
U rated voltage of motor winding, V:
rated power of motor, kW.
JB/T1473±2000
4.12 The motor windings should be able to withstand a 1-minute voltage test without breakdown. The frequency of the test voltage is 50 Hz and should be as sinusoidal as possible. The values ​​are shown in Table 6:
Winding name
Stator winding
Field winding
Test voltage (effective value) V
1000+2 times rated voltage
10 times rated excitation voltage, minimum 1500, maximum 3500
1000+2 times the maximum voltage effective value (the voltage is at this time 1000 + 2 times the maximum effective value of the voltage (the voltage exists between the ends of the field winding under the specified starting conditions), but the minimum is 1500
When the motor starts, the field winding is connected in parallel with a resistor less than 10 times the resistance of the field winding
When the motor starts, the field winding is connected in parallel with a resistor equal to or greater than 10 times the resistance of the field winding
4.13 The motor winding should be able to withstand a short-term increased voltage test without breakdown of the inter-turn insulation. The test is carried out when the motor is unloaded, with a voltage of 130% of the rated voltage and a time of 3 minutes. When the voltage is increased to 130% of the rated voltage, the speed is allowed to increase, but it should not exceed 115% of the rated speed. Motors that have undergone the inter-turn impulse voltage test do not need to undergo this test. 4.14 The A-weighted sound power level limit of the motor's air-cut noise shall be in accordance with the provisions of Table 7. Table 7
TM400-—32
TM500—36
TM600—36
TM800-36
TM1000--36
TM1250--40
4.15 The stator of the motor should be made into six outlet terminals, which are generally led out by cables under the base. dB(A)
The direction of rotation of the motor: counterclockwise when viewed from the collector ring end. If there are other requirements, the supply and demand parties shall negotiate to resolve them. 4.16
The double amplitude vibration value at the bearing of the motor at the rated speed of no-load should not be greater than 0.075mm. 4.18 The motor is connected to the mining mill with a coupling, and the motor shaft extension cannot withstand external radial and axial forces. 4.19
The strong excitation current of the motor excitation system is 1.4 times the rated excitation current. 4.20 The motor should be equipped with a grounding terminal on the base and should have obvious markings. 5 Inspection rules and test methods
5.1 Each motor must pass the inspection before leaving the factory, and a certificate of inspection should be attached. 5.2 Each motor should undergo inspection and test, and the inspection test items are: a) Determination of the insulation resistance of the winding to the casing and between the windings; b) Determination of the DC resistance of the winding in the actual cold state: c) Determination of no-load characteristics:
d) Determination of steady-state short-circuit characteristics:
JB/T14732000
e) Voltage withstand test of the winding to the casing and between the windings:) Short-time voltage increase test:
g) Overspeed test:
h) Vibration measurement.
5.3 The motor must be subjected to type test in any of the following situations: a) When trial production of new products is completed; b) When changes in design or process are sufficient to cause changes in certain characteristics and parameters; d) When the inspection test results deviate unacceptably from the results of previous type tests. 5.4 The motor type test includes:
a) All items of inspection test;
b) Determination of motor excitation current under no-load overexcitation and rated voltage and rated armature current; c) Temperature rise test;
d) Determination of efficiency;
e) Determination of stall current and stall torque; f) Determination of nominal pull-in torque;
| Determination of step-out torque;
h) Determination of winding reactance and time constant; i) Determination of noise
5.5 The tests in Articles 5.2 and 5.4 of this standard shall be carried out in accordance with GB/T1029, GB/T10069.2 and GB10068.1. 6 Marking and packaging
The nameplate and data shall be ensured not to fall off during the service life of the motor and the writing shall be clear. 6.14
6.2 The nameplate should be fixed on a conspicuous position on the motor base, and the items to be marked are as follows: a) Manufacturer name:
b) Motor name:
c) Motor model:
d) Rated frequency, Hz;
e) Rated power, kw:
) Rated voltage, V;
g) Rated current, A;
h) Number of phases;
i) Winding connection method;
j) Rated speed, I/min;
k) Rated power factor:
I) Insulation grade;
m) Enclosure protection grade:
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