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首页> 外文会议>Leeds-Lyon Symposium on Tribology; 19990914-17; Leeds(GB) >Transient thermal effects in a pivoted pad thrust bearing
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Transient thermal effects in a pivoted pad thrust bearing

机译：枢轴瓦推力轴承中的瞬态热效应

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摘要

This paper reports results of the experimental investigation of the performance characteristics of a pivoted pad thrust bearing during the transient thermal period following a sudden change in operating conditions. Two identical "catalogue" thrust bearings with outer diameter 228,6 mm and 60% offset are installed in a specially developed experimental test facility, which permits direct on-line measurement of bearing friction torque. The effects of sudden variations in rotational speed, load and oil supply flow rate on the bearing friction torque, collar and shaft temperatures and pressure profile are presented and analysed. A sharp change in friction torque follows a step change in operating conditions. The torque afterwards has a tendency to change gradually due to viscosity change. The total transient period is quite long (15-20 minutes) and depends on the parameter changed. Collar temperatures vary in the radial direction. The greatest difference in the rate of change of collar temperatures occurs after a drop in oil supply flow rate.
机译：本文报告了在工作条件突然变化之后的瞬态热周期中，枢轴瓦推力轴承性能特征的实验研究结果。在专门开发的实验测试设备中安装了两个相同的，外径为222.6 mm，偏移为60％的“目录”推力轴承，可以直接在线测量轴承的摩擦扭矩。给出并分析了转速，负载和供油流量的突然变化对轴承摩擦扭矩，轴环和轴温度以及压力分布的影响。摩擦转矩的急剧变化是在工作条件下发生阶跃变化之后。之后，由于粘度变化，扭矩具有逐渐变化的趋势。总的瞬态周期很长（15-20分钟），取决于更改的参数。套环温度沿径向方向变化。轴环温度变化率的最大差异出现在供油流量下降之后。

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