装载机转向液压系统的热平衡分析与比较  

Analysis and comparison for thermal balance of steering hydraulic system of loader

作　　者：王剑鹏[1] 秦四成[1] 杨立光[2] 石有胜[1] 

机构地区：[1]吉林大学机械科学与工程学院,吉林长春130022 [2]水利部长春机械研究所,吉林长春130012

出　　处：《中南大学学报（自然科学版）》2016年第5期1527-1532,共6页Journal of Central South University:Science and Technology

基　　金：国家科技支撑计划项目(2013BAF07B04)~~

摘　　要：基于集中参数法建立装载机液压转向系统的传热仿真模型,并对高速跑车试验工况进行仿真分析。针对50型轮式装载机几种典型作业方式,对同轴流量放大转向系统和流量放大转向系统2种配置的装载机利用传热模型分别进行热平衡仿真计算,并计算2种转向液压系统的功率损失。研究结果表明:仿真与试验结果一致,证明模型准确可信。目前装载机热平衡工业性试验中普遍采用的I形铲装循环工况,并不是装载机液压系统最大热负荷工况。同轴流量放大转向液压系统装载机在T形作业中热平衡温度与环境温差最高为74.3℃;流量放大转向液压系统装载机在V形作业中热平衡温度与环境温差最高为62.64℃。Based on the lumped parameter method to establish simulation model of heat transfer in the loader full hydraulic steering system,high-speed car test conditions were simulated. For several typical mode of operation,the thermal balance simulation of two kinds of steering hydraulic system was done by using heat transfer model. The loss of two hydraulic steering systems was compared. The results show that the results validated the simulation model is accurately credible. At present, the I-shaped shovel loading cycle is widely used in the thermal balance industrial test of loader, which is not the maximum heat load condition of the hydraulic system of loader. The thermal balance temperature and the ambient temperature difference of the coaxial flow amplifying steering hydraulic system loader in the T-shaped operation is 74.3 ℃; the thermal balance temperature and the ambient temperature difference between the flow amplification and steering hydraulic system loader in the V-shaped operation is 62.64 ℃.

关 键 词：转向液压系统 传热 仿真 装载机 

分 类 号：TH243[机械工程—机械制造及自动化]