摘要
针对液力缓速器充液率计算较为困难的问题,从精确计算进出口流量方面入手,提出了一种基于联合仿真弱耦合技术的计算方法。通过供油液压系统建模和仿真得到缓速器充液油路入口、排液油路出口压力,调用液力缓速器CFD内流场计算结果得到排液油路入口压力,利用流量连续性方程得到充液油路出口压力;再根据压力换算出进出口流量,进而得到充液率。基于联合仿真弱耦合进行了液力缓速器充液率控制仿真计算与分析。通过台架试验验证了这种方法的可行性和仿真计算精度。方法在保证计算精度的同时极大的缩短了计算时间,为解决液力缓速器CFD与系统仿真耦合问题提供了一种新思路。
In response to the calculation of hydraulic retarder oil charging ratio,starting from the accurate calculation of the inlet and outlet flowrates,a calculation method based on weak co-simulation is proposed.Through the modeling and simulation of the oil supply hydraulic system,the inlet pressure of the retarder is obtained from the inlet of the filling oil circuit and the outlet pressure of the discharge oil circuit,the calculation results of the flow field in the CFD of the hydraulic retarder are use to obtain the inlet pressure of the draining oil circuit,and the outlet pressure of the liquid-filled oil circuit is obtained by using the flow continuity equation.Then the inlet and outlet flow rates are converted according to the pressure,and the filling rate is obtained.Based on the weak coupling co-simulation,the simulation calculation and analysis of the liquid filling rate control of the hydraulic retarder is carry out.The feasibility and simulation calculation accuracy of this method are verified by bench test.The method in this paper greatly shortens the calculation time while ensuring the calculation accuracy.It provides a new way of solving the problem of coupling CFD and system simulation.
作者
王凯峰
王昕
谢基晨
王忠山
廖辉仪
马文星
WANG Kai-feng;WANG Xin;XIE Ji-chen;WANG Zhong-shan;LIAO Hui-yi;MA Wen-xing(Shaanxi Fast Gear Co.,Ltd.,Xi'an 710119,China;School of Mechanical and Aerospace Engineering,Jilin University,Changchun 130015,China;School of Transportation Science and Engineering,Beihang University,Beijing 100191,China)
出处
《液压气动与密封》
2023年第4期32-38,共7页
Hydraulics Pneumatics & Seals
基金
国家自然科学基金(52172352,52072018)
广西省重点科技项目(AA19254013)
