摘要
基于结构动力学与流体动力润滑理论,建立柱塞副微运动过程的动力学模型,数值求解了工作过程中柱塞偏移、倾斜的微运动特性,并进一步获得了柱塞最大升程、柱塞副初始密封长度、初始间隙等参数对柱塞微运动特性的影响规律分析,提出了原模型的改进方案。计算结果表明:增加柱塞的最大升程会使偏移量增大而倾斜角变小;适当增加柱塞副初始密封长度及减小初始间隙有利于减小柱塞偏移量及倾斜角,改善柱塞的微运动特性。通过对原模型优化改进可使柱塞最大偏移量和倾斜角减小约50%。
Based on the structural dynamics and hydrodynamic lubrication theory, a kinetic model of plunger and barrel assembly was established, and the micro motion characteristics of plunger offset and inclination were calculated. Moreover, the influences of the three key parameters of maximum lift, initial sealing length as well as initial clearance between the plunger and barrel on the micro motion of plunger were deeply investigated, and an improved model design was proposed. The calculation results show that when increasing the maximum lift, the plunger offset increases, but the inclination decreases. In addition, the proper increase of the initial sealing length and decrease of the initial clearance between the plunger and barrel leads to the reduction of the plunger offset and inclination, which improves the micro motion of the plunger. In the improved model, the maximum plunger offset and inclination can be reduced by half.
作者
王慧敏
向建华
汪川
WANG Huimin;XIANG Jianhua;WANG Chuan(School of Machine and Vehicle,Beijing Institute of Technology,Beijing 100081,China)
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2019年第3期65-71,共7页
Chinese Internal Combustion Engine Engineering
基金
国家自然科学基金面上项目(51575045)~~
关键词
高压油泵
柱塞副
微运动
动压支撑
high-pressure pump
piston pairs
micro motion
dynamic pressure support
