液压与气动2024，Vol.48Issue(7)：33-43,11.DOI:10.11832/j.issn.1000-4858.2024.07.004
阀式蓄能器对换挡液压系统压力冲击的影响
Influence of Valve Accumulator Parameters on Pressure Shock of Shifting Hydraulic System
摘要
Abstract
Based on the shifting hydraulic system of a heavy-duty vehicle,a valve accumulator with damping throttling groove is innovatively designed.Through flow field simulation,the pressure cloud image under different piston displacements is analyzed,and the throttling area of damping groove is configured according to the actual working conditions.Through dynamic simulation model of shifting hydraulic system,the influence law of different structural parameters of valve accumulator on dynamic performance of moving parts of valve accumulator is analyzed,and the influence mechanism of structural parameters on pressure change of hydraulic cylinder of actuating clutch is obtained.The results show that the U+K-shaped valve port of the valve accumulator shows a two-stage throttling characteristic,and the throttling area can be changed from large to small.Compared with the spring accumulator with the same structural parameters,the valve accumulator can reduce the inlet pressure impact amplitude of the hydraulic cylinder by 41％.Increasing the width of U-shaped throttling slot can reduce the impact amplitude of pressure at the inlet of clutch hydraulic cylinder.When the length of U-shaped throttling slot is increased,the pressure impact amplitude has no obvious change.Increasing the stiffness of the return spring can reduce the pressure impact of the hydraulic cylinder inlet.关键词
换挡液压系统/压力冲击/阀式蓄能器/阻尼节流槽/结构参数Key words
shifting hydraulic system/pressure impact/valve accumulator/throttling groove/structural parameters分类
机械制造引用本文复制引用
魏列江,徐晓鑫,单乐..阀式蓄能器对换挡液压系统压力冲击的影响[J].液压与气动,2024,48(7):33-43,11.基金项目
国家重点研发计划(2022YFB3403003) （2022YFB3403003）
