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Machinery Industry Standard of the People's Republic of China
Technical conditions for marine DC motors
JB5798-91
This standard specifies the basic parameters, technical requirements, test methods, and marking and packaging and transportation requirements for marine DC motors. This standard applies to all types of marine DC generators and marine DC motors except DC motors for deck machinery. 2 Reference standards
China Classification Society Rules for Classification and Construction of Seagoing Steel Ships (1989 Edition) GB191
GB1311
GB1971
GB1993
GB2423.16
GB2423.17
GB2829
GB10069.1
GB10068.1
GB7060||tt ||GB4772
GB4831
JB2759
JB4159Www.bzxZ.net
Packaging, storage and transportation indication signs
Basic technical requirements for rotating motors
Cylindrical shaft extension of motors
Motor structure and installation type code
DC motor test methods
Motor line terminal markings and rotation direction
Motor cooling methods
Basic environmental test for electrical and electronic products Inspection procedures Test Db: Alternating damp heat test method
Basic environmental test procedures for electrical and electronic products Test J: Mildew growth test method Basic environmental test procedures for electrical and electronic products Periodic inspection counting sampling procedure and sampling table Test Ka: Salt spray test method
Determination method and limit of noise for rotating electrical machines Engineering determination method of noise Determination method and limit of vibration for rotating electrical machines
Basic technical requirements for marine motors
Motor dimensions and tolerances
Method for compiling motor product models
General technical conditions for packaging of electromechanical products
General technical conditions for tropical electrical products
3 Types, basic parameters and dimensions
3.1 Model regulations
Vibration determination method
The model compilation of marine DC motors shall be carried out in accordance with the provisions of GB4831. Examples of model compilation: a. Model of marine DC generator
ZF-□OH
Environmental code for use, H represents marine use.
Specification code, center height (mm), iron core length code. Product code, ZF indicates DC generator. Approved by the Ministry of Machinery and Electronics Industry on October 15, 1991 and implemented on October 1, 1992
bMarine DC motor model
Z-□-H
Use environment code, H indicates marine use.
Specification code, center height (mm), iron core length code. Product code, Z indicates DC motor.
3.2 Shell protection type
The shell protection type of marine DC motors is IP22, IP23, and IP44. 3.3 Cooling method
The cooling method of marine DC motors is generally IC01, IC06IC0141; IC0041 according to the provisions of GB1993. 3.4 Structure and installation type
The structure and installation type of marine DC motors are generally according to the provisions of GB997: IM1001 (IMB3) IM2001 (IMB35); IM1002, IM1003; IM1004, IM2002, IM3001 (IMB35), IM3011 (IMV1).
3.5 Rated power of marine DC motors
3.5.1 Marine DC motors should be manufactured according to the following rated powers: 0.25, 0.37, 0.55; 0.75, 1.1, 1.5; 2.2#345.57.5; 11, 15, 18.5, 22, 30; 37; 45#55; 75, 90, 110, 132160, 185, 200, 220, 250, .280, 315; 355, 400; 450kW. 3.5.2 Marine DC generators should be manufactured according to the following rated powers: 0.75, 1.11.5, 2.2#34, 5.5, 7.5, 11; 15; 18.522, 3037; 45; 55; 7590; 110; 132160; 185; 200220, 250280, 315355; 400; 450500kW. 3.6 Rated voltage of marine DC motors
3.6.1 The rated voltage of marine DC generators is generally 28; 115; 230460V. 3.6.2 The rated voltage of marine DC motors is generally 24, 110; 220, 440V. 3.7 Marine DC motor speed
The synchronous speed of marine DC motors and DC generators is generally 3.8 Rated
3000;1500;1000;750;600;500400r/min. The rated value of marine DC motors is the maximum continuous rated value based on the S1 working system. Special needs can be specified separately in the product technical conditions. 3.9 Excitation mode
The excitation mode of marine DC motors is compound excitation, parallel excitation or external excitation. Special needs can be specified separately in the corresponding product technical conditions. 3.10 Dimension parameters
3.10.1 The installation dimensions and external dimensions of the motor shall comply with the provisions of GB4772. 3.10.2 The tolerance of the motor installation dimensions shall comply with the provisions of GB4772.1. 3.10.2.1 The radial runout tolerance of the motor shaft extension at the half length shall not be greater than the provisions of Table 1. Table 1
Shaft extension nominal diameter D
Radial runout tolerance
>18~30
>30~50
>50~30
>80~120
3.10.2.2 The radial runout of the flange stop diameter (N) to the shaft centerline and the end face runout of the flange support surface to the perpendicular surface of the shaft centerline shall not be greater than the specified values in Table 2. Diameter N||tt| ... Pitch
Roll 22.5°
Tilt 15°
Trimming 10°.
4.3.2 Marine DC motors should be able to operate normally when the ship is subject to impact and vibration during operation. The screws should not break, the brush box should not be deformed and misplaced, and the brushes should not be broken. 4.4 Marine DC motors should be able to operate reliably under the voltage changes specified in GB7060. 4.5 Temperature rise
4.5.1 The insulation material of the marine DC motor winding must be resistant to moisture, heat and oil. When running at rated temperature of 50℃, the temperature rise limit of each part shall not exceed the provisions of Table 3: Table 3
Motor parts
Armature winding and field winding
Single-layer commutation winding
Commutator
Iron core in contact with winding and other parts
Thermometer method
Resistance method
Thermometer method
Resistance method
Thermometer method
Resistance method
In any case, the insulation of itself or the adjacent The allowable temperature of the bearing should not exceed the following values: rolling bearing
sliding bearing
Marine DC motors should have a spark of 1~1-
JB5798-91
level in all cases from no-load (for motors that do not allow no-load, from 1/4 load) to rated load; in short-time overcurrent or short-time overtorque (generators bear 150% rated torque, motors bear 160% rated torque), the spark should not exceed 1
level. The spark of short-time rated and intermittent rated marine DC motors should not exceed 1~1 level in all cases from no-load to rated load.
4.6.2 Except for the case where the brushes need to be moved to adjust the speed, the position of the brushes of the marine DC motor on the commutator should be maintained in the position specified by the manufacturer in all cases from no-load to over-current or over-torque. 4.7 Marine DC motors should be able to withstand the over-current or over-torque specified below in the hot state and rated voltage. At this time, the temperature rise of the winding is not taken into account, but the motor should not have abnormal noise or vibration, nor should it be damaged or have harmful deformation. 4.7.1 The generator is overloaded with 150% of the rated current for 15 seconds. 4.7.2 The motor is overloaded with 160% of the rated torque (when the equipment is limited, 160% of the rated current can be used instead) for 15 seconds. 4.8 When the excitation winding of the marine DC generator is close to the operating temperature, the speed is rated, and the position of the magnetic field resistor remains unchanged, from rated load to no-load and from no-load to rated load, the generator voltage regulation rate is calculated according to the following formula, and the result should not be greater than the provisions of Table 4. U.-UH%
Voltage regulation rate A4
Where: Au Generator voltage regulation rate, %, U. No-load voltage, V,
UH Rated voltage, V.
Motor power
4.9 Voltage load characteristics of marine DC generators UH
Regulation rate
4.9.1 For shunt-excited generators with a rated power of more than 55kW, the voltage should be set to the rated value at full load. When the load is suddenly removed, the increase in the stable voltage should not exceed 15% of the rated voltage; the voltage should not be greater than the no-load voltage at full load or no load. 4.9.2 For compound-excited generators, considering that the speed regulation rate of the prime mover is within 3% to 5%, the speed is adjusted to the rated value at full load and is in a hot state, at 20% load, the voltage deviation should be within ±1% of the rated voltage, and at full load, the voltage deviation should be within ±2.5% of the rated voltage. The difference between the average value of the rising and falling voltage regulation curves of the voltage load characteristic between 20% load and full load and the rated voltage should not exceed 4%.
4.10 When the field winding of the marine DC motor is close to the operating temperature, the voltage is kept unchanged from full load to no load, and the speed adjustment rate of the motor shall comply with the provisions of Table 5:
Power converted to 1000r/min
JB5798-91
The speed tolerance of the marine DC motor when it is fully loaded and reaches the operating temperature shall not be greater than that specified in Table 6: Table 6
Power converted to 1000r/min
0.67~2.5 or less
2.5~10 or less
10 and above
Speed tolerance
4.12 When the power, voltage and speed of the marine DC motor are at the rated values, the guaranteed value of its efficiency shall comply with the provisions of the product technical conditions, and its efficiency tolerance shall comply with the provisions of GB755. Direct method (i.e. input-output method): -0.15 (1-n), minimum -0.07. Indirect method (i.e. loss analysis method):
a. Rated power below 55kW is -0.15 (1-n) b. Rated power above 55kW is -0.10 (1-n) The insulation resistance of the marine DC motor winding should not be less than 2M2 in hot state and should not be less than 5M2 in cold state. 4.13
Marine DC motors should be able to withstand an overspeed test lasting 2 minutes without harmful deformation under no-load conditions. The speed during the test is 120% of the maximum speed for motors and 120% of the rated speed for generators. 4.15 The winding of the marine DC motor should be able to withstand a withstand voltage test of 1000V plus 2 times the rated voltage, but the minimum withstand voltage test is 1500V, which lasts for 1 minute without the insulation being broken down. The frequency of the test voltage is 50Hz, and the waveform is as sinusoidal as possible. 4.16 The same DC motor should not be subjected to repeated withstand voltage tests, but when the user requires it, it is allowed to conduct another withstand voltage test at the installation site after installation and before starting operation. The test value should be 80% of the value specified in Article 4.15. The insulation resistance should be measured before the test. 4.17 The withstand voltage test of the inter-turn insulation of the armature winding of the marine DC motor is carried out by applying impulse voltage to compare the waveforms according to the following specified time (or number of times) using the inter-chip method. No fault should occur. 4.17.1 For different coils before going offline, the applied power frequency test voltage (effective value) should not be less than 530V, and the DC test voltage should not be less than 960V. The test time is 1 to 3s.
JB5798—91
4.17.2 For the same coil before going offline, the peak value of the impulse voltage applied should not be less than 100V, and the number of impulses should not be less than 5 times. 4.17.3 The peak value of the impulse voltage applied to the coil after going offline and before being dipped in paint should not be less than 500V, and the number of impulses should not be less than 5 times. 4.18 If the marine DC motor cannot be subjected to an impulse voltage test due to equipment reasons, a short-term voltage increase test can be used. At this time, the voltage should be increased to 130% of the rated voltage under no-load conditions for 5 minutes, and no failure should occur. 4.19 The noise limit of the A-weighted sound power level of the marine DC motor measured at no-load should not exceed the provisions of Table 7: Table 7
>22～37
>37～55
>55～110
>110～220
>220~500
≤960
>9601320
>1320~1900
>1900~2360
The maximum effective value of the vibration velocity of the marine DC motor measured at no-load should comply with the provisions of Table 8. Table 8
Rated speed
6001800
180014
speed, 120% of the maximum speed for the motor and 120% of the rated speed for the generator. 4.15 The winding of the marine DC motor should be able to withstand a withstand voltage test of 1000V plus 2 times the rated voltage, but the minimum withstand voltage test is 1500V, which lasts for 1 minute, and the insulation is not broken down. The frequency of the test voltage is 50Hz, and the waveform is as sinusoidal as possible. 4.16 The same DC motor should not be repeatedly subjected to a withstand voltage test, but if the user requires it, it is allowed to conduct another withstand voltage test at the installation site after installation and before starting operation. The test value should be 80% of the value specified in Article 4.15. The insulation resistance should be measured before the test. 4.17 The withstand voltage test of the inter-turn insulation of the armature winding of the marine DC motor uses the inter-chip method to apply impulse voltage for the following specified time (or number of times) to compare the waveforms, and no faults should occur. 4.17.1 For different coils before going offline, the applied power frequency test voltage (effective value) should not be less than 530V, the DC test voltage should not be less than 960V, and the test time should be 1 to 3s.
JB5798—91
4.17.2 For the same coil before going offline, the peak value of the impulse voltage applied should not be less than 100V, and the number of impulses should not be less than 5 times. 4.17.3 The peak value of the impulse voltage applied to the coil after going offline and before being dipped in paint should not be less than 500V, and the number of impulses should not be less than 5 times. 4.18 If the marine DC motor cannot be subjected to an impulse voltage test due to equipment reasons, a short-term voltage increase test can be used. At this time, the voltage should be increased to 130% of the rated voltage under no-load conditions for 5 minutes, and no failure should occur. 4.19 The noise limit of the A-weighted sound power level of the marine DC motor measured at no-load should not exceed the provisions of Table 7: Table 7
>22～37
>37～55
>55～110
>110～220
>220~500
≤960
>9601320
>1320~1900
>1900~2360
The maximum effective value of the vibration velocity of the marine DC motor measured at no-load should comply with the provisions of Table 8. Table 8
Rated speed
6001800
180014
speed, 120% of the maximum speed for the motor and 120% of the rated speed for the generator. 4.15 The winding of the marine DC motor should be able to withstand a withstand voltage test of 1000V plus 2 times the rated voltage, but the minimum withstand voltage test is 1500V, which lasts for 1 minute, and the insulation is not broken down. The frequency of the test voltage is 50Hz, and the waveform is as sinusoidal as possible. 4.16 The same DC motor should not be repeatedly subjected to a withstand voltage test, but if the user requires it, it is allowed to conduct another withstand voltage test at the installation site after installation and before starting operation. The test value should be 80% of the value specified in Article 4.15. The insulation resistance should be measured before the test. 4.17 The withstand voltage test of the inter-turn insulation of the armature winding of the marine DC motor uses the inter-chip method to apply impulse voltage for the following specified time (or number of times) to compare the waveforms, and no faults should occur. 4.17.1 For different coils before going offline, the applied power frequency test voltage (effective value) should not be less than 530V, the DC test voltage should not be less than 960V, and the test time should be 1 to 3s.
JB5798—91
4.17.2 For the same coil before going offline, the peak value of the impulse voltage applied should not be less than 100V, and the number of impulses should not be less than 5 times. 4.17.3 The peak value of the impulse voltage applied to the coil after going offline and before being dipped in paint should not be less than 500V, and the number of impulses should not be less than 5 times. 4.18 If the marine DC motor cannot be subjected to an impulse voltage test due to equipment reasons, a short-term voltage increase test can be used. At this time, the voltage should be increased to 130% of the rated voltage under no-load conditions for 5 minutes, and no failure should occur. 4.19 The noise limit of the A-weighted sound power level of the marine DC motor measured at no-load should not exceed the provisions of Table 7: Table 7
>22～37
>37～55
>55～110
>110～220
>220~500
≤960
>9601320
>1320~1900
>1900~2360
The maximum effective value of the vibration velocity of the marine DC motor measured at no-load should comply with the provisions of Table 8. Table 8
Rated speed
6001800
1800
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