重载静压转台承载力与油垫温度场分布的关系

doi:10.13229/j.cnki.jdxbgxb20170152

摘要/Abstract

摘要： 推导了极坐标下考虑离心力的雷诺方程,建立了以对流散热为主的极坐标下的能量方程,将雷诺方程与能量方程进行联立,利用有限差分法建立了不同转速下油垫温度分布与重载静压转台承载性能的变化关系。同时,在某5 m立车静压支承试验台进行测试试验和相关分析验证,证明了所建模型的正确性。结果表明:油膜温度随转台转速增大而升高;当转速达到40 r/min时温度迅速升高,承载力急剧下降。油垫封油边四周温度升高不同,速度大的一侧的温度升高更加明显,易产生局部高温。研究结果可为进一步分析静压转台的热补偿及结构设计优化提供理论依据和数据参考。

关键词: 机械设计, 温度场, 重型静压转台, 转速, 承载力

Abstract: As temperature increases the viscosity of the heavy machine hydrostatic turntable oil film decreases, resulting in the decrease in the bearing capacity of the table. Therefore, temperature is an important factor affecting the speed and bearing capacity of the turntable. The Reynolds equation considering the centrifugal force and the convection dominated energy equations are simultaneously established in polar coordinates. Finite difference method is applied to establish the relationship between temperature distribution and bearing capacity of the hydrostatic turntable under different speed. The established model is verified in a 5 meter vertical lathe hydrostatic bearing test rig. The results show the oil temperature increases with the rotation speed of the table; when the speed reaches 40r/min, the temperature rises rapidly and the bearing capacity decreases sharply. The oil gasket seal edge temperature rise is different, in the high speed side the temperature rise is more obvious, resulting in local high temperature region. This study may provide reference for further analysis of thermal compensation and structural design optimization of hydrostatic turntable.

Key words: mechanical design, temperature field, heavy machine hydrostatic rotary table, rotating speed, bearing capacity

中图分类号:

TG117.1

刘志峰, 赵代红, 王语莫, 浑连明, 赵永胜, 董湘敏. 重载静压转台承载力与油垫温度场分布的关系[J]. 吉林大学学报(工学版), 2018, 48(3): 773-780.

LIU Zhi-feng, ZHAO Dai-hong, WANG Yu-mo, HUN Lian-ming, ZHAO Yong-sheng, DONG Xiang-min. Relationship between bearing capacity of heavy machine hydrostatic rotary table and temperature field distribution of oil pad[J]. 吉林大学学报(工学版), 2018, 48(3): 773-780.

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