降低齿轮型无级变速器封闭功率影响的运动研究

Kinematic considerations for Reducing the Circulating Power Effects In Gear Type Continuously variable Transmission

本研究述及带相移和加法差速器的非圆齿轮无级变速装置(NCG)的运动分析和设计研究。阐述着重于不同设计参数对降低封闭功率影响的运动关系。研究折衷表明必须采用的多数非圆齿轮和装置中产生的封闭功率。实例200HP(149Kw)的非圆齿轮无级变速装置,速比范围为1-4,用来说明其研究的特性曲线,要求估算加法差速器4组成部分以及在失效工况下它的最大瞬时封闭功率大约为输出功率的6倍。该封闭功率由其1.5最小值到最大值和为输出功率2.

The present study deals with the kinematic analysis and design considerations of a continuously variable transmission (CVT) utilizing non circular gear (NCG) sets with phase shift and summing differentials. The kinematic relationships are developed with emphasis on the effect of the different design parameters on reducing the circulating power inherent in this type of system. The study shows that a compromise has to be made between the number of non circular gear sets to be used and the circulating power generated in the system. For the illustrative example of a 200 hp(149 kW) system it is shown that, for a gear ratio range from 1 to 4 and the considered characteristic curve on the non circular gears, four sets of summing differentials are estimated to be required and the maximum instantaneous circulating power at the worst condition would be approximately 6 times the output power. The circulating power changes from its minimum of 1.5 to its maximum value with an average circulating power of 2.8 times the output power.