Experimental Measurements of Oil Films in a Dynamically Loaded Journal Bearing

Experimental Measurements of Oil Films in a Dynamically Loaded Journal Bearing
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动态负载轴颈轴承中油膜的实验测量

DOI:
10.1080/10402004.2022.2106926
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发表时间:
2022
影响因子:
2.1
通讯作者:
Beamish S
Beamish S
中科院分区:
工程技术4区
文献类型:
--
作者:
Beamish S

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本文描述了一个轴颈轴承测试平台的设计,该平台能够通过永久嵌入轴承和转轴的超声波换能器进行高精度的膜厚测量。带有可编程阀的定制液压加载系统允许应用具有定义加载模式的动态加载,包括模拟汽车连杆轴承等真实部件的加载模式。在一系列转速、温度和载荷剖面下进行测试,可以详细分析薄膜厚度对快速变化载荷的响应。与传统方法不同,超声波技术提供了对轴-轴承界面的非侵入性直接测量,从而可以研究挤压膜效应等现象。测量是通过应用一种新的参考方法实现的,称为“快照技术”。通过该方法,挤压时间随着轴转速、施加载荷和轴承温度的增加而减少。结果与电感式传感器和数值方法进行了比较,结果一致。
This article describes the design of a journal bearing test platform capable of high-accuracy film thickness measurements via ultrasonic transducers permanently embedded in both the bearing and rotating shaft. A bespoke hydraulic loading system with programmable valves allowed the application of dynamic loads with defined loading patterns, including the simulation of loading patterns found in real components such as automotive connecting rod bearings. Tests under a range of rotation speeds, temperatures, and loading profiles allowed the detailed analysis of film thickness response to rapidly changing loads. Unlike conventional methods, the ultrasonic technique offers a noninvasive direct measurement of the shaft–bearing interface, thus enabling the study of phenomena such as squeeze film effects. Measurements were achieved by applying a novel referencing method, referred to as the “snapshot technique”. Via this method, squeeze time was shown to reduce with increasing shaft rotation speed, applied load, and bearing temperature. Results were compared against inductive sensors and numerical techniques and good agreement was observed.
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