【作者】 程海林；

【导师】 姜伟；

【作者基本信息】 浙江工业大学 ， 机械电子工程， 2004， 硕士

【摘要】 静压传动技术在各类工程机械中得到广泛的应用，对作为其核心部件的径向柱塞式低速大扭矩液压马达的研究显得十分重要，为了能直接对这种马达进行寿命估计，并能在相同工况下求得寿命最长的轨道曲线，本文从设计等接触应力内曲线的角度对这类马达作探讨性的研究，主要从以下四个方面进行： (1)综合考虑径向柱塞式液压马达工作时的各种主要受力状况，对柱塞组件进行受力分析，并通过仿真分析影响轨道和滚动体间正压力的各个因素，得到正压力的简化表达式。 (2)应用赫兹接触理论和所求得的轨道与滚动体之间的正压力，分别列出以球和滚子作滚动体的等接触应力轨道曲线方程组，利用matlab求解方程组，并对求解结果进行仿真分析，论证了所求的结果在理论上的合理性，归纳出设计这种液压马达的注意事项。 (3)基于等接触应力曲线的求解结果和弹性流体动力润滑理论，求得滚动体和轨道曲线间的油膜厚度表达式，并通过仿真分析论证了马达正常工作时这种油膜能满足承载能力和润滑的需要。 (4)在理论分析等接触应力轨道曲线的基础上，对试验研究进行了探讨，并设计了相应的试验方案。更多还原

【Abstract】 Hydrostatic transmission is widely used in construction machine. The research of one of its hard cores, low speed high torque radial piston motor, is very important. To directly estimate the life of this kind of motor, and to design a orbit curve with the longest life at same condition, this paper gives theoretic research of the equal contact stress inner curve of radial piston motor. The research is divided into four parts:1) Taken all forces the piston endured into consideration when radial piston motor working, the force between roller (or ball) and orbit is deduced. The simple style of the press expression can be confirmed by ignoring minor influence factors after analysis all factors that will influence this press.2) Applied Hertz theory and the force between roller (or ball) and orbit, the equation groups for calculating equal contact stress curve are listed. The answer of the equation groups is calculated by utilizing the software MATLAB. The result of the simulation to this answer proved that theanswer is reasonable and the design rule also be discussed from the analysis result.3) Based on the analysis result of equal contact stress curve and the theory of elasto-hydrodynamic lubrication, the expression of the oil film thickness between roller (or ball) and orbit are calculated. The simulation result proved that the thickness of oil film is enough for bearing and lubricating.4) Based on the theory analysis of the equal contact stress inner curve, the experiment research is discussed, and the project of experiment is also designed.更多还原