齿轮齿条传动往复运动过程的润滑分析

发布时间：2018-06-12 06:17

本文选题：往复运动 + 齿轮齿条　；参考：《表面技术》2017年09期

【摘要】：目的通过对往复运动齿轮齿条传动过程中压力、膜厚、温度的计算,获得往复运动齿轮齿条的润滑状况,为机构的设计提供理论依据。方法将齿轮齿条的传动模型简化为圆柱与无限大平面之间的运动,建立往复运动齿轮齿条传动的热弹流润滑模型。采用Ree-Eyring流体,压力求解采用多重网格法,弹性变形采用多重网格积分法,计算得到齿轮齿条往复运动过程中的中心压力、中心膜厚、最小膜厚和最高温度,并与单向运动情况比较。结果与单向运动相比,往复运动由于在换向过程中存在加速、减速过程,降低了齿轮齿条机构在啮合周期内润滑油膜厚度,啮合线上变速过程始末附近区域膜厚和压力都会产生一定程度的波动。换向瞬时,受挤压效应的影响,产生油膜凹陷,油膜变薄,润滑状态变差。结论在计算往复运动齿轮齿条润滑油膜与压力时,存在换向的啮合周期需要着重讨论。在工程实际中设计往复运动齿轮齿条润滑时,应着重考虑单双齿啮合转换点与换向点处的润滑情况。
[Abstract]:Objective to obtain the lubrication condition of reciprocating gear rack by calculating the pressure, film thickness and temperature in the process of reciprocating gear rack transmission, and to provide a theoretical basis for the design of the mechanism. Methods the transmission model of gear rack was simplified as the motion between cylinder and infinite plane, and the thermo-elastohydrodynamic lubrication model of reciprocating gear rack transmission was established. By using Ree-Eyring fluid, the pressure is solved by multi-grid method, and the elastic deformation is solved by multi-grid integration method, the center pressure, the center film thickness, the minimum film thickness and the maximum temperature of gear rack during reciprocating motion are calculated. The results are compared with the one-way motion. Results compared with the unidirectional motion, the reciprocating motion reduces the thickness of lubricating oil film during the meshing period because of the acceleration and deceleration of the reciprocating motion. The thickness and pressure of the film near the beginning and end of the variable speed process on the meshing line will fluctuate to a certain extent. The oil film is depressed, the oil film is thinned and the lubricating state is bad. Conclusion when calculating the film and pressure of reciprocating gear rack, the meshing period of reversing need to be discussed. In the design of reciprocating gear rack lubrication in engineering practice, the lubrication of single and double tooth meshing transition point and commutating point should be considered emphatically.
【作者单位】：青岛理工大学机械工程学院;
【基金】：国家自然科学基金(51575289)~~
【分类号】：TH117.2;TH132.41

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