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Active control device for propeller shaft transverse vibration

A technology of lateral vibration and active control, applied in the direction of propulsion transmission, transmission with synchronous propulsion components, propulsion power transmission, etc., can solve the problems of narrow operating frequency band, limited vibration damping effect, and inability to adapt to changes, etc., to achieve Improve working conditions, reduce friction and wear, reduce coupling vibration and sound radiation effects

Inactive Publication Date: 2020-10-09
CHINA SHIP DEV & DESIGN CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dynamic vibration absorption technology is an effective means to suppress resonance, but the frequency band of action is too narrow, and it cannot be adaptively changed, so it is difficult to apply to the suppression of broadband disturbance, and its vibration reduction effect is also extremely limited

Method used

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  • Active control device for propeller shaft transverse vibration
  • Active control device for propeller shaft transverse vibration
  • Active control device for propeller shaft transverse vibration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The electromagnetic bearing includes two pairs of electromagnet assemblies, four electromagnets are evenly distributed along the circumference, and the two sets of electromagnet assemblies are respectively used to control the vibration of the electromagnetic bearing in the vertical and horizontal directions. The electromagnet has a U-shaped structure, and each electromagnet includes two magnetic poles.

[0026] The control of the two electromagnets of each pair of electromagnet assemblies can adopt a differential drive mode, where the electromagnetic force of one electromagnet is driven by the sum of the bias current and the control current, and the electromagnetic force of the other electromagnet is controlled by the bias current and the control current. Driven by the difference of current, the total electromagnetic control force of the group of electromagnet components is the difference of the electromagnetic force of the two electromagnets. The bias current is the DC...

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Abstract

The invention discloses an active control device for propeller shaft transverse vibration. The active control deice comprises a stern bearing, a middle bearing and a thrust bearing which are sequentially distributed in an axial direction of a propeller shaft, and further comprises an electromagnetic bearing assembly, wherein one end, close to the stern bearing, of the propeller shaft is connectedto counterweight, and the other end of the propeller shaft is connected to a motor; the electromagnetic bearing assembly comprises an electromagnetic bearing, a displacement sensor, a controller and apower amplifier, wherein the electromagnetic bearing is arranged on the propeller shaft; the displacement sensor is mounted on the electromagnetic bearing; the displacement sensor is connected to thecontroller; and the power amplifier is separately connected to the controller and the electromagnetic bearing. The active control device can reduce load of the stern bearing or the middle bearing, sothat bearing friction force is reduced or eliminated.

Description

technical field [0001] The invention belongs to the technical field of vibration control of ship propulsion shafting, and in particular relates to an active control device for propulsion shaft lateral vibration. Background technique [0002] Existing propulsion shaft devices include stern bearings, intermediate bearings, and thrust bearings, among which the stern bearings and intermediate bearings are water-lubricated bearings, which have a large low-speed friction coefficient, and friction noise is likely to be generated when the lubrication is poor, which will damage the underwater acoustics of the aircraft. performance. Due to the poor fluidity of water, the poor lubrication of water-lubricated bearings is more serious than that of stern bearings. The actual operation results show that the intermediate bearings produce periodic friction noise when the shafting runs at low speed. [0003] The passive control of lateral vibration of propulsion shafting is mainly studied fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/04F16F15/03B63H23/32
CPCB63H23/321F16C32/0444F16C32/0461F16F15/03
Inventor 黄志伟
Owner CHINA SHIP DEV & DESIGN CENT
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