A broadband damping and vibration reduction modular water-lubricated bearing

A water-lubricated bearing, modular technology, applied in sliding contact bearings, bearings, flexible bearings, etc., can solve the problem of little application research on vibration reduction and noise reduction of water-lubricated stern bearings, and achieve low maintenance costs and improved comfort. , Improve the effect of vibration reduction and noise reduction

Active Publication Date: 2021-03-30
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, the porous structure is considered to be one of the main methods to improve the broadband vibration and noise reduction of materials. Some progress has been made, but there is little research on the application of water-lubricated stern bearings for vibration and noise reduction

Method used

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  • A broadband damping and vibration reduction modular water-lubricated bearing
  • A broadband damping and vibration reduction modular water-lubricated bearing
  • A broadband damping and vibration reduction modular water-lubricated bearing

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Multiple damping modules are evenly spaced, and there is a gap between two adjacent damping modules. Axial through holes 8 are evenly distributed on the damping modules. The axial through holes on multiple damping modules can correspond one by one to form through holes. , and may not correspond to penetration. When the main shaft rotates at different speeds, vibration and noise of different frequencies will be generated. When the vibration radially passes through the tail bearing slats, the vibration energy will be reduced. Compared with the slats without axial through holes, when the vibration energy enters Part of the axial through hole will be consumed, so the vibration energy that can pass through the inner bushing will be further reduced, which can absorb noise and attenuate vibration to a certain extent (see Figure 4 and Figure 7 ). The water in the gap between the damping modules will flow when the main shaft rotates, forming a fluid-solid coupling. Under the...

Embodiment 2

[0031] A plurality of damping modules are installed with interference fit, and axial cavities are evenly distributed on the damping modules, and fluids, such as silicone oil, etc. are injected into the axial cavities. When the main shaft rotates, the silicone oil in the holes is generated under external excitation. Vibration, friction with the wall, using the enhanced damping effect of the fluid-solid coupling area to attenuate the transmission of vibration.

Embodiment 3

[0033] The interference fit between multiple damping modules is installed. The first and last two damping modules are solid structures. The middle damping module is evenly distributed with axial through holes. Water enters the axial through holes. When the main shaft rotates, the water in the holes is excited by the outside world. Vibration is generated under the action, friction with the wall surface, and the damping effect enhanced by the fluid-solid coupling area is used to attenuate the transmission of vibration.

[0034] The structure of the arrangement of the axial through holes is different, and the natural frequency is different. The damping modules with different arrangement structures can reduce vibration and noise at different frequencies. Due to the gravity of the main shaft, there will be an eccentric load, mainly the lower part bears the load, so in order to meet the rigidity requirements, the lower part of the bearing uses a rubber damping module with a smaller m...

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Abstract

The invention provides a broadband damping vibration reduction modularized water lubricating bearing. The bearing comprises an outer bushing, an inner bushing and a main shaft, wherein the outer bushing, the inner bushing and the main shaft are sequentially arranged from outside to inside in a sleeving mode; the inner bushing comprises a plurality of groups of composite damping battens and a plurality of stopping copper strips; the plurality of stopping copper strips are arranged on the inner peripheral surface of the outer bushing at uniform intervals in the circumferential direction; and theplurality of groups of composite damping battens are respectively embedded in gaps between every two adjacent stopping copper strips and are attached to the inner wall of the outer bushing. The broadband damping vibration reduction modularized water lubricating bearing can achieve broadband damping vibration reduction, is suitable for vibration control in more frequency domains, has more variability due to the modular design, has better vibration reduction and noise reduction effects in more working conditions, and improves the comfort level of civil ships and the concealment of underwater vehicles.

Description

technical field [0001] The invention belongs to the technical field of mechanical bearing structures, and in particular relates to a broadband damping and vibration reduction modularized water lubricated bearing. Background technique [0002] The working conditions of the stern bearing of an underwater vehicle are extremely harsh, and the response amplitude of the shafting vibration is relatively large here. It plays a key role, and every time the underwater vehicle reduces the radiation noise by 6-10dB, the range of the passive sonar of the enemy can be reduced by about 50%, and the range of the passive sonar of one's own side can be increased by about 1 times, so the vibration reduction of the tail bearing Noise reduction research is of great significance to the improvement of the vibration theory system of ship propulsion shafting, and to the improvement of the quiet level and survivability of ships such as underwater vehicles. [0003] At present, water-lubricated stern...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C27/00F16C27/06F16F15/16B63H23/32
CPCB63H23/326F16C27/00F16C27/063F16C2326/30F16F15/161
Inventor 金勇刘子豪刘正林欧阳武
Owner WUHAN UNIV OF TECH
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