周转斜盘发动机动力学分析与优化

Dynamic analysis and optimization of swash-plate engine

为对某型周转斜盘发动机的动力学特性进行优化,建立了其连杆力模型、反作用转矩模型、接触转矩模型及主轴转矩模型.在对各数学模型进行仿真分析的基础上,提出设置2°的周向原始位移以保证反作用转矩始终为正,更改直导槽约束机构为"∞"型导槽约束机构以降低接触转矩和主轴转矩的波动幅度、减小滚轮与导槽的接触力、保证发动机主轴良好的输出特性.仿真研究表明:采用"∞"型导槽约束机构,并设置2°的周向原始位移,可优化周转斜盘发动机的动力学特性.

In order to optimize the dynamic properties of a swash-plate engine, the force model of the connecting rod, the anti-torque model, the contact torque model and the mainshaft torque model were established. Based on the mathematical models, a 2° original circumferential displacement was pro- posed to guarantee that the value of anti-torques were positive, and a ＇∞~＇ guidance was proposed to replaced the straight guidance to decrease fluctuating amplitude of the mainshaft torque, to reduce the contact force between the roller and guidance, and to guarantee a good output characteristic of the ma- inshaft. The simulation results indicate the ＇∞＇ guidance and a 2° original circumferential displace- ment can optimize the dynamic characteristics of the swash-plate engine.