Influence of Ellipticity of Journal Bearing on Vibration Response of Rotor During Acceleration Process

doi:10.7652/xjtuxb201809003

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Influence of Ellipticity of Journal Bearing on Vibration Response of Rotor During Acceleration Process

更新时间：2025-05-01

- Influence of Ellipticity of Journal Bearing on Vibration Response of Rotor During Acceleration Process
- Vol. 52, Issue 9, Pages: 19-27(2018)
- 作者机构：
  
  西安交通大学现代设计及转子轴承系统教育部重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201809003
  CLC： TH113
- Online First：10 September 2018，
  
  Published：2018
- 稿件说明：
移动端阅览
Influence of Ellipticity of Journal Bearing on Vibration Response of Rotor During Acceleration Process[J]. 2018, 52(9): 19-27.
DOI：

Influence of Ellipticity of Journal Bearing on Vibration Response of Rotor During Acceleration Process[J]. 2018, 52(9): 19-27. DOI： 10.7652/xjtuxb201809003.

摘要

针对传统固定瓦轴承无法根据实际工况调节轴承参数的问题

提出了一种椭圆度可调滑动轴承结构。该轴承结构基于机械传动原理

将主动控制应用于流体轴承

可以在不同转速下

根据转子实际的振动情况调节轴承椭圆度

通过改变油膜厚度来抑制转子的振动

使转子加速过程中的振动幅值始终保持在安全范围内。通过有限元法建立了转子轴承系统模型

用于计算转子加速过程的动力学响应

并通过改变该椭圆度可调滑动轴承的油膜间隙

分析了椭圆度对转子加速过程振动响应的影响。研究发现:经过临界转速区域时

转子属性表现为柔性转子系统

这时通过减小椭圆度、增大油膜间隙能有效抑制转子的振动; 远离临界转速区域时

转子属性表现为刚性转子系统

这时通过增大椭圆度来减小油膜间隙也能有效地抑制转子的振动。

Abstract

An ellipticity adjustable journal bearing structure is proposed to solve the problem that the conventional fixed-bearing bearings cannot adjust their parameters under different working conditions. Following the principle of mechanical transmission

this structure applies active control to the fluid bearing

so it can adjust the bearing ellipticity according to the actual vibration of the rotor at different rotation speeds. By changing the thickness of the oil film to suppress the vibration of the rotor

the vibration amplitude of the rotor is always in the safe range during acceleration process. The rotor bearing system model is established by finite element method and then the dynamic response of the rotor acceleration process is evaluated. The influence of the ellipticity on the vibration response of the rotor acceleration process is revealed by changing oil film thickness of the ellipticity adjustable bearing. The results indicate that the rotor behaves as a flexible rotor system when it passes the critical speed

and lower ellipticity facilitates suppressing system vibration due to the smaller stiffness and damping. The rotor behaves as a rigid rotor system when the rotor operates away from the critical speed

and higher ellipticity facilitates suppressing system vibration due to the larger stiffness and damping.

关键词

Keywords

references

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