JB/T 5794-1991 General technical specifications for marine motors for deck machinery
Some standard content:
Mechanical Industry Standard of the People's Republic of China
General Technical Conditions for Marine Motors for Deck MachinerySubject Content and Scope of Application
JB/T57941991
This standard specifies the general technical requirements and test methods for AC and DC motors used for various types of cranes and cargo hoists supporting ship deck machinery. This standard is applicable to AC and DC motors used for various types of cranes, cargo hoists, speed stabilizers and jack winches installed on the open decks and deck cabins of ships. ] tt||GB1993
GB7060
JB2759
JB/Z294||tt| |JB/Z346
Packaging, storage and transportation pictorial symbols
Basic technical requirements for rotating electrical machines
Basic environmental test procedures for electrical and electronic productsTest Db: Alternating damp heat test methodBasic environmental test procedures for electrical and electronic productsTest J: Long berry test methodBasic environmental test procedures for electrical and electronic productsTest Ka: Salt spray test methodPeriodic inspection counting sampling procedure and sampling table (applicable to the inspection of production process stability)Motor product model compilation method
Motor housing protection classification
Rotating electrical machine vibration Determination methods and limits'Vibration determination methodsEngineering determination methods for noise
Determination methods and limits for noise of rotating electrical machines
Test methods for DC electrical machines
Test methods for three-phase asynchronous electrical machines
Cylindrical shaft extensions for electrical machines
Conical shaft extensions for electrical machines
Motor structure and installation type codes
Motor terminal markings and direction of rotation
Motor cooling methods
Basic technical requirements for marine electrical machines
General technical conditions for packaging of electromechanical products
Test method for inter-turn insulation of scattered windings of DC low-voltage motors Test limit for inter-turn insulation of scattered windings of AC low-voltage motors Cable stuffing box
China Classification Society Rules for Classification and Construction of Steel Seagoing Vessels (1989 Edition) Approved by the Ministry of Machinery and Electronics Industry on October 15, 1991 and implemented on October 1, 1992
3 Types, basic parameters, dimensions
3.1 Model regulations
JB/T5794—1991
Marine motors for deck machinery (hereinafter referred to as motors) are divided into DC and AC. The model compilation of motors should comply with GB4831.
Example of motor model compilation
a) DC motor
Specification code: indicates center height (mm) core length. Product code: ZZJ indicates DC motor for lifting, Q at the mouth is used for jack winch, W at the mouth is used for stabilizing winch, and H at the mouth is used for cargo crane.
b) AC motor for lifting
c) AC motor for cargo lifting
□—H
Specification code: indicates center height (mm), base length, number of polesProduct code: YZ indicates AC motor for lifting, Q at the mouth is used for jack winch, W at the mouth is used for stabilizing winch.
YHOQ—OO
H（D）
H indicates marine use, (D) indicates round fixed flangeSpecification code: the first mouth indicates the flange stop diameter (mm) and the second mouth indicates the number of poles.
Product code: indicates AC asynchronous motor for cargo crane. The port is L for constant torque, and the port is G for constant power. bzxZ.net
3.2 Shell protection grade
For motors installed in open deck places, the shell protection grade is IP56; for motors installed in deck cabins, the shell protection grade is IP44. The shell protection grade of the brake should be consistent with that of the motor. 3.3 Cooling method
JB/T5794—1991
The cooling method of the motor is in accordance with the provisions of GB1993, generally IC0041, IC37. 3.4 Structure and installation type
The structure and installation type of the motor are in accordance with the provisions of GB997, generally IM1001 (IMB3), IM2001 (IMB35), IM3001 (IMB5), IM3011 (IMV1).
3.5 Brake
A DC disc electromagnetic brake (hereinafter referred to as brake) is installed at the non-shaft extension end of the motor. The brake is equipped with a manual release device, which can be released manually when power is off, and the rotor can rotate freely. The motor can also be without a brake. 3.6 Voltage and frequency
3.6.1 The rated voltage of the DC motor should be 220; 440V. 3.6.2 The rated voltage and frequency of the AC motor should be 380V/50Hz; 440V/60Hz. 3.7 Rating
The rating of the motor is a short-time rating based on the 120, 90, 60, 30, 10, 5minS2 working system or a cycle working rating based on one of the 15%, 25%, 40%, 60%S3 to SS intermittent cycle working systems. 3.8 Power level
3.8.1 The relationship between the power of a DC motor and the base should comply with the relevant product technical requirements. The power level of the motor is generally: 1.9; 2.2; 2.6; 3.0: 3.75; 4.1: 5.0: 5.6; 6.0; 6.7; 7.1; 7.5: 10.0: 10.5; 10.8: 11.2; 12.7: 13.8: 14.1; 15.0: 18.5; 19.5: 21.2; 22.426.0; 28.0 ;29.030.0；33.5；37.3；39.0；45.0；48.5；52.0；56.0；63.5；67.0；75.0；82.0；86.0；97.0104:112：123；138；149；150；186；200；243；248kW.3.8.2 The relationship between the power of AC motor and the base shall comply with the provisions of relevant product technical conditions. The power is divided into single speed, double speed, three speed, and three speed and above speed power levels. 3.8.2.1 The power levels of single speed AC motor are: a) 50Hz/60Hz for hoisting.
1.1/1.2; 1.5/1.8; 2.2/2.5; 3.7/4; 5.5/6.3; 7.3/8.5; 11/13; 15/18.5; 18.5/2222/25kW. b) The power level of motors for cargo cranes and other special purposes can be separately formulated according to user needs. 3.8.2.2 The power levels of two-speed AC motors are: a) The power level for lifting is according to Table 1:
2.2/0.75;3.0/1.1;4.0/1.5;6.3/2.2;8.5/3.5;11/3;15/4;18.5/5.52.5/0.85:3.5/1.2;4.5/1.7;7.5/2.5;10/4.0;.13/3.5:17/4.5;22/6.3b) The power level of the cargo crane (50Hz/60Hz) is: 7.5/3.7;15/5.0kW.
The power levels of three-speed AC motors are as follows:
a) The power level for hoisting is in accordance with Table 2;
9/9/4.2;12.5/12.5/5.7;16.8/16.8/8;22.5/22.5/t0.6;30/30/14.5;42/42/20;56/56/27;75/75/3610/10/4.7;14/14/6.5;19/19/9.1; 25/25/12;33/.5/33.5/16;46/46/22;63/63/30;84/84/40b) The power level of the cargo crane (50Hz/60Hz) is: 105
JB/T5794-1991,
30/15/3.7;38/19/4.1:44/22/5.2:60/30/7:61/29/6.8:80/40/7.9kW. 3.8.2.4 The power level of the four-speed AC motor can be separately formulated according to user needs. 3.9 Number of poles of AC motor
3.9.1 The number of poles of single-speed AC motors is generally 4, 6, 8, or 16. The number of poles of double-speed AC motors is generally 4/8, 4/12, or 4/16. 3.9.2
The number of poles of three-speed AC motors is generally 4/8/16, 4/8/24, 4/8/28, 6/12/36. The number of poles of four-speed AC motors can be separately formulated according to user needs. 3.10
Dimension parameters
The dimension parameters of various motors shall comply with the provisions of the corresponding product technical conditions. 4 Technical requirements
4.1 The motor shall be manufactured according to the drawings and technical documents approved by the prescribed procedures. 4.2 The motor shall be able to work normally under the following environmental conditions: a) Ambient temperature is -25~+45℃;
b) Relative air humidity is 95%;
c) Affected by salt spray, oil mist, bacteria and seawater: d) Tilt and sway: roll 22.5°, heel 22.5°, trim 10°; e) Affected by shock and vibration during ship operation. 4.3'The motor shall work reliably under the following frequency and voltage changes: a) DC motor voltage change is +6%~-10% b) AC motor voltage change is +6%~=10%, frequency change is ±5%. 4.4 When the voltage, frequency and power of the motor are rated, the guaranteed values of its efficiency and power factor shall comply with the provisions of the relevant product technical conditions.
4.5 When the motor is at rated voltage. The guaranteed values of the ratio of the stall torque and the maximum torque to the rated torque shall comply with the provisions of the relevant product technical conditions.
4.6 Under rated voltage, during the starting process of the motor, the guaranteed value of the minimum torque shall not be less than 1.2 times the rated torque. 4.7 The tolerance of the guaranteed value of the electrical performance of the motor shall comply with the provisions of Table 3. 4.8 The motor adopts Class B, Class F or Class H insulation. When the ambient temperature does not exceed -25~+45℃, the temperature rise limit of the windings and other parts of the motor with intermittent cycle working system shall not exceed the provisions of Table 4. For short-time working motors, the temperature rise limit is allowed to be 10K higher than the value in Table 4.
4.8.1 When the temperature rise test is performed, the cooling medium temperature at the motor inlet is the ambient temperature. If the difference between its value and the specified maximum ambient temperature is less than 30K, the allowable temperature rise limit during the test will not be further corrected. 4.8.2 When the cooling medium temperature at the motor inlet is lower than the specified maximum ambient temperature by more than 30K during the temperature rise test, the allowable temperature rise limit during the test should be corrected according to the specified cooling medium temperature and then reduced by one percentage, and its value is 1/5 of the difference between the two. 4.9 The temperature of the motor bearing (thermometer method) should not exceed 80℃ for sliding bearings and 90℃ for rolling bearings. 4.10 Insulation
4.10.1 The insulation resistance of the motor winding, excitation coil and brake coil should be greater than 2MQ in the hot state and greater than 5M2 in the actual cooling state.
JB/T5794-1991
4.10.2 The motor winding, excitation coil and brake coil shall be able to withstand the insulation dielectric strength test lasting 1 minute without breakdown. The frequency of the test voltage is 50 (60) Hz, the waveform is as sinusoidal as possible, and the effective value of the test voltage shall be in accordance with Table 5. 4.10.3 The motor winding and brake shall not be subjected to the insulation dielectric strength test during acceptance. However, if the user requires, one more test is allowed after installation and before operation. The test voltage shall not exceed 80% of that specified in Table 5. The insulation resistance value of the winding shall be measured before the test. If necessary, the motor may be dried before the test. Table 3
Motor components
AC stator winding
Efficiency
a) Indirect method
Rated power below 50kW
Rated power 50kW and above
b) Direct method
Power factor
Locked-rotor torque
Maximum torque
Minimum torque
Locked-rotor current
AC motor slip
Speed of DC motor
Moment of inertia
Electric winding with commutator
Field winding
Brake coil
-0.15(1~n)
0.10(1 -)
-0.15 (1-n) minimum is -0.007
1-co5Φ minimum is -0.02,
maximum is -0.07
-15% of guaranteed value
-10% of guaranteed value
-15% of guaranteed value
+20% of guaranteed value
±20% of guaranteed value
Wattage converted to -1000r/min
Less than 0.67
0.67-2.5 or less
2.5~10 or less
Above 10
± 10%
Guaranteed value +10% or -10%
Motor winding to housing and windings between each other DC motor excitation field winding
Brake wire density
Motor windings should be able to withstand turn-to-turn impulse withstand voltage test. Etc.
(Resistance method)
Test voltage (effective value)
JB/T5794-1991
4.10.4.1 The rated voltage of the AC motor with micro-embedded winding is 360V and 440-V, and the test should be carried out according to the impulse voltage peak value specified in JB/Z346. The wavefront time is 0.5μS, and there should be no fault in the inter-turn insulation. 4.10.4.2 For DC motors with a rated voltage below 660V, the inter-turn insulation withstand voltage test uses the inter-chip method to apply impulse voltage, and the waveform comparison method is used, and there should be no fault. The test voltage and time shall be as follows: a) The power frequency test voltage (effective value) applied to different coils before going offline shall not be less than 530V, the DC test voltage shall not be less than 960V, and the test time shall not be less than 1~3s:
b) The peak value of the impulse voltage of the same coil before going offline shall not be less than 700V, and the number of impulses shall not be less than 5 times: c) The peak value of the impulse voltage between the sheets before being dipped in paint after going offline shall not be less than 500V, and the number of impulses shall not be less than 5 times. 4.10.4.3 In addition to the provisions of 4.10.4.2, the DC motor winding shall be able to withstand a short-term voltage increase test without breakdown between turns. During the test, the motor is unloaded, the external voltage is 130% of the rated voltage, and the duration is 5 minutes. During the test, the frequency or speed is allowed to be increased at the same time. (The speed shall not exceed 120% of the maximum rated speed). 4.11 When the three-phase power supply is balanced, the deviation of any phase of the three-phase no-load current of the AC motor from the three-phase average value shall not be greater than 5% of the three-phase current average value.
4.12 Overtorque of motors
4.12.1 Overtorque of AC motors
4.12.1.1 AC motors shall be able to withstand 160% of the rated torque for 2 minutes without damage or harmful deformation. 4.12.1.2 In the hot state, the high-speed AC motor shall be able to withstand the maximum torque specified in the technical conditions of each product (allowing for human tolerance) for 15 seconds without damage or harmful deformation.
For AC motors with more than two speed levels, at the rated voltage of the slow-speed level, starting from the actual cold state, they shall be able to withstand a 1-minute stall, and the motor shall not be damaged or harmfully deformed. 4.12.2 Overtorque of DC motors
4.12.2.1 In the hot state and under the condition of increasing the overload torque as specified in Table 6 (if there is no test condition, the corresponding overcurrent can be used instead), the DC motor shall last for 15 seconds without sudden speed changes, stalling or harmful deformation. Table 6
Motor excitation mode
Overtorque multiple (for a duty cycle of 25%) 3.0
4.12.2.2 For DC motors used as paving machines and winches, it is allowed to stop for 1 minute when the DC motor shaft reaches 2 times the rated torque. 4.13 Under rated voltage, the commutation spark of the DC motor from no-load to rated load should not exceed 1 level. When the maximum allowable overload specified in Article 4.12.2 is reached, the commutation spark should not exceed 2 levels. 4.14 Overspeed
4.14.1 Under no-load conditions, the AC motor should be able to withstand an overspeed test of 120% of the maximum slow synchronous speed for 2 minutes, and the mechanical structure of the rotating part should not be subject to harmful deformation.
.4.14.2 Under no-load conditions, the DC motor should be able to withstand an overspeed test of 120% of the maximum allowable operating speed for 2 minutes without harmful deformation.
4.15 Speed regulation performance of DC motor
4.15.1 Based on the specification of 25% intermittent cycle duty, the DC motor is allowed to increase the speed to 108
2 times the rated speed specified in the product technical conditions of JB/T5794-1991
by weakening magnetic field. At this speed, the maximum torque is allowed to reach 0.8 times the rated torque. 4.15.2 Based on the specification of 25% of the intermittent cycle duty system, the DC motor is allowed to increase the external voltage (not exceeding 440V) for parallel-excited and compound-excited motors (except for the case of two motors in series) to increase the speed to 2 times the rated speed specified in the product technical conditions. At this speed and at rated excitation, the maximum torque allowed is 1.5 times the rated torque. 4.16 Under rated voltage, the motor is tested for the number of starts and load duration per hour. The temperature rise of the brake coil shall comply with the provisions of Table 4.
4.16.1 For hoisting motors, the maximum allowable number of brake closures within 1 hour is 120 times. The brake should be able to work normally and the temperature rise should not exceed the provisions of Table 4.
4.16.2 For motors used in cargo cranes, the maximum allowable number of brake closures within 1 hour is 480 times. The brake should be able to work normally and the temperature rise should not exceed the provisions of Table 4.
4.17 When the wear of each friction plate (or block) of the brake pad (or brake block) reaches the maximum value and the brake coil voltage drops to 80% of the rated voltage, the motor should be able to work normally within the specified working range. 4:18 The braking torque of the brake should be able to ensure that when the brake air gap is the maximum, the motor can be braked at the rated torque within the specified time as follows.
The braking time for hoisting motors is 1.5s and the braking time for hoisting motors is 1.0s. 4.19 The motor and brake should have moisture resistance and should meet the requirements of GB7060 after 55℃, 6 cycles of alternating damp heat test. 4.20 The metal surfaces of the motor and brake should have a protective coating, the fasteners of the conductive parts should be made of brass, and all fasteners should have an anti-corrosion electroplating layer. After the salt spray test, it should meet the requirements of GB7060. 4.21 The materials of the windings and insulating parts of the motor and brake should have anti-raspberry properties, and after testing, they should not be lower than the requirements of GB7060.
4.22 The casing of the motor and brake should comply with the requirements of GB4942.1 after the casing protection test. 4.23 The motor and brake should be able to withstand the tilt and sway of the ship's working conditions. After the test, the bearing temperature should not exceed the requirements of Article 4.9, and there should be no leakage of lubricating oil (grease). 4.24. The noise limit of the A-weighted sound power level measured when the motor is no-load at high speed should comply with the following provisions. 4.24.1 The noise limit of the DC motor should be less than the provisions in Table 7. Table 7
Motor power kw
1.
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