曲轴摩擦副试验台试验过程轴瓦磨损的模拟计算分析

Simulation Analysis of Crankshaft Bearing Wear in the Experiment of the Friction Pair Test Bed

在曲轴摩擦副试验台进行连杆轴承润滑特性试验过程中,发现轴瓦有磨损现象。本文通过AVL-excite对曲轴摩擦副试验台进行了模拟计算,对轴承进行了热弹性流体动压润滑数值模拟,得出曲轴摩擦副试验台的轴瓦磨损不是由载荷过大造成的结论。通过Fluent模拟计算试验轴油道内润滑油流动及温度分布,分析发现润滑油在油道内散热量比较大,到达轴承时润滑油温度较低,润滑油温度低是造成轴瓦磨损的主要原因。

In the process of the experiment for studying lubrication characteristic of the crank- shaft connecting rod bearing on the test bed of friction pair, we found wear phenomenon of the bear- ing shell. This paper has carried out the simulation calculation of the test bed through the software of AVL - excite, using TEHD to simulate the connecting rod bearing , and found that load was not the reason for the wear phenomenon . And this paper also simulates the oil flow and temperature dis- tribution of the lubrication oil through the software of fluent , finding that the lubricating oil in the oil passage loses much heat . The temperature of the lubricating oil is low when oil reaches bearings. Therefore, low temperature is the reason causing the wear phenomenon of the bearing.