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采用有限元分析软件ANSYS研究20 t挖掘机铲斗油缸用Y形圈在一个往复运动周期内、不同热源作用下的温度分布;采用控制变量法分析各因素(介质压力、往复运动速度、介质温度等)对Y形圈温度场的影响。结果表明:只考虑摩擦生热时,最高温度出现在Y形圈密封唇口处,考虑机械滞后生热时,最高温度出现在Y形圈根部较厚的部位,且在一定环境温度下摩擦生热对Y形圈最高温度的影响较大;相比于介质压力,活塞杆往复运动速度对Y形圈最高温度的影响更为显著,在只考虑机械滞后生热时,油液温度对Y形圈最高温度的影响较大,介质压力和往复速度对Y形圈最高温度的影响较小。
The finite element analysis software ANSYS was used to study the temperature distribution of a 20 t excavator bucket cylinder Y-ring in a reciprocating cycle with different heat sources. The control variables were used to analyze the factors (medium pressure, reciprocating speed, medium temperature Etc.) on the Y-ring temperature field. The results show that the maximum temperature appears only at the seal lip of the Y-ring when friction heat is generated. The maximum temperature appears in the thicker part of the root of Y-ring when the mechanical lagging heat generation is considered. And under the certain ambient temperature, Compared with the medium pressure, the reciprocating speed of the piston rod has a more significant influence on the maximum temperature of the Y-ring. When considering only the mechanical hysteresis heat generation, the temperature of the Y-shaped ring The influence of the maximum temperature of the ring is large, and the influence of the medium pressure and the reciprocating speed on the maximum temperature of the Y-ring is small.