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Motor for ship and vibration and noise reduction method thereof

A noise reduction and vibration reduction technology, which is applied in the direction of asynchronous induction motors, electrical components, electromechanical devices, etc., can solve the problems that cannot meet the requirements of the ship environment, and the electromagnetic vibration of the motor is large, so as to reduce the detection distance and reduce the Small high-frequency vibration, the effect of improving the quiet ability

Active Publication Date: 2013-03-20
WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GRP CO LTD
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AI Technical Summary

Problems solved by technology

Using the electromagnetic design method of the traditional motor, the electromagnetic vibration of the motor is relatively large, which cannot meet the requirements of the ship environment

Method used

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  • Motor for ship and vibration and noise reduction method thereof
  • Motor for ship and vibration and noise reduction method thereof
  • Motor for ship and vibration and noise reduction method thereof

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Embodiment Construction

[0025] The invention relates to a method for reducing vibration and noise of a marine motor. The method includes the following measures:

[0026] The first item: select the number of stator slots and rotor slots according to the following rules: Q2≠3PG±1; Q2≠3PG±P / 2±1; Q2≠3PG±P±1; Q2≠Q1±1; Q1-Q2≠ ±P±1; │Q1-Q2│≠0, 1, 2, 3, 4, │Q1-Q2│≠P, P±1, P±2, P±3, P±4; │Q1-Q2│ ≠P / 2, P / 2±1, P / 2±2, P / 2±3, P / 2±4; among them, Q1 is the number of stator slots, Q2 is the number of rotor slots, P is the number of motor poles, G is any integer, and the number of stator slots is increased, so that the final number of stator slots is greater than the original number of stator slots of the motor. This measure can avoid or reduce the stator-rotor harmonic magnetic field, especially the excitation force of the 4th order and below generated by the mutual coupling of the first-order and second-order tooth harmonics; after increasing the number of stator slots, the sine degree of the magnetic field can be...

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Abstract

The invention discloses a motor for a ship and a vibration and noise reduction method thereof. A three-phase asynchronous motor for the exiting ship is improved from two aspects of reducing the electromagnetic exciting force and preventing the superposition of the frequency of the electromagnetic exciting force with the inherent frequency of a motor stator core, so that the low-frequency vibration generated by the electromagnetic exciting force is maximally avoided or weakened, and the high-frequency vibration is reduced. According to a principle that if the underground vibration frequency is lower, the vibration transmissibility is stronger, the low-frequency vibration acceleration level and the total vibration level of the three-phase asynchronous motor for the exiting ship can be greatly reduced, so that the mute ability of the ship is improved, and the distance of the ship discovered by sonar equipment is reduced.

Description

technical field [0001] The invention relates to a marine motor and a method for reducing vibration and noise thereof. Background technique [0002] At present, the general-purpose motor vibration assessment indicators are: vibration velocity, vibration acceleration, and vibration displacement, while the three-phase asynchronous motor for ships mainly assesses the ability of vibration to propagate underwater, thereby reducing the distance that the ship is detected by sonar equipment . The vibration of three-phase asynchronous motors used in ships is assessed by the type of vibration acceleration level, which directly characterizes the energy and vibration transmission ability of vibration. The vibration in this case is called structure-borne noise. Using the electromagnetic design method of the traditional motor, the electromagnetic vibration of the motor is relatively large, which cannot meet the requirements of the ship environment. Contents of the invention [0003] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K17/12H02K1/16H02K1/26
Inventor 柳鑫来海丰杨盛成郝萍郭军明王荣丽
Owner WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GRP CO LTD
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