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Dynamical pressure gas elasticity foil bearing with stability self-adaptive control function

An adaptive adjustment and elastic foil technology, applied in the field of bearings, can solve the problems that the active control and adaptive adjustment of system vibration cannot be realized, and achieve the effects of meeting real-time control requirements, increasing bearing capacity, and improving stability

Inactive Publication Date: 2010-06-02
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this adjustable mechanism has certain limitations. The system vibration can only be controlled passively by adjusting the screw-in amount of the cylindrical plug, and the active control and self-adaptive adjustment of the system vibration cannot be realized.

Method used

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  • Dynamical pressure gas elasticity foil bearing with stability self-adaptive control function
  • Dynamical pressure gas elasticity foil bearing with stability self-adaptive control function
  • Dynamical pressure gas elasticity foil bearing with stability self-adaptive control function

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Experimental program
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Embodiment Construction

[0019] The structural principle and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0020] see figure 1 , figure 2 , image 3 , a dynamic pressure gas elastic foil bearing with the function of self-adaptive adjustment of stability, including a bearing housing 6, a bearing pad 5, an elastic foil 2 and a piezoelectric ceramic micro-displacement actuator 8, five bearing pads 5 are evenly distributed along the inner wall of the bearing housing 6, and the positioning screws 7 pass through the through holes on the bearing housing 6 and are screwed into the threaded holes on the bearing pad 5, and the bearing pad 5 is installed on the inner wall of the bearing housing 6 and limit the swing of the bearing pad 5. The elastic foil 2 is composed of the bottom arch foil 3 and the top layer foil 4. One end of the bottom arch foil 3 and the top layer foil 4 is welded on the bearing pad 5, and the top la...

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PUM

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Abstract

The invention relates to a dynamic gas elastic foil bearing with stability and adaptive control functions, comprising a bearing casing, a plurality of bearing pads, an elastic foil, and a piezoelectric ceramics micro displacement actuator. The dynamic gas elastic foil bearing is characterized in that the bearing pads are uniformly distributed along the inner wall of the bearing casing; the bearingpads are welded with a bottom bump foil and one end of a top foil; the other end of the top foil is lapped over an adjacent top foil, wherein the piezoelectric ceramics micro displacement actuator with one end fixed on a set screw and the other end arranged on a jig is connected with two bearing pads; the piezoelectric ceramics micro displacement actuator is connected with a feedback controller PID; an input of the feedback controller PID is connected with an eddy current displacement sensor. The dynamic gas elastic foil bearing with stability and adaptive control functions has the advantagesof strengthened equivalent rigidity and equivalent damping of the elastic foil, restrained vibration of rotor system, improved bearing capacity and stability of the bearing, reduced size and structure, increased control precision of displacement, and quickened response speed.

Description

technical field [0001] The invention relates to a bearing, in particular to a dynamic pressure gas elastic foil bearing with a stability self-adaptive adjustment function. Background technique [0002] At present, the dynamic pressure gas elastic foil bearing has been developed to the fourth generation. It is composed of multiple bottom arch foils and smooth top foils. The bottom arch foil adopts the form of axial strips, which increases the structural damping of the bearing and effectively The load carrying capacity of the bearing is improved, and the high-temperature metal wear-resistant coating and pre-tightening assembly technology are introduced, so that the bearing has good adaptability and can operate in extreme environments such as high temperature and high speed. However, when this kind of bearing operates at a speed more than twice the natural frequency of the rotor, there is still inherent gas dynamic pressure instability, which seriously affects the use of this k...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C32/06F16F15/03
Inventor 杨利花虞烈
Owner XI AN JIAOTONG UNIV
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