摘要
为了解决通过复杂流道设计来集中控制多执行机构的多路阀内部流道压力损失大、能量消耗高、右行走马达不够灵敏等问题.应用Pro/E软件建立挖掘机中高压多路阀右行走联模型,并基于计算流体动力学方法,对三维流场模型以紊流形式,采用SIMPLEC算法进行流动计算,分析其内部油液的流动状态及其流道结构参数对压力损失的影响.结果表明:除主阀口及进油口与单向阀阀口间流道存在压力损失之外,多路阀右行走联单向阀阀口与工作油口间的公共流道存在明显的压力损失;在分析该流道的轴向尺寸与角度尺寸分别对压力损失的影响上,得出轴向尺寸值与压力损失大小成正比,角度尺寸值对压力损失影响不大,但跟涡流尺度及涡核数目成反比.最后,对该多路阀的压力损失进行了试验测试,其结果与数值计算吻合,验证了相关结论的可靠性.
To solve the problems,such as large pressure drop and high energy-consuming in the flow channels in the multi-way valve which centralizes control on multi-actuator,and the motor for right travel is not sensitive enough etc,the hydraulic oil flow in the channel of the valve was analyzed and the effect of the channel structure on the minor pressure drop was clarified.In doing so,the geometry model of the right travel link of the multi-way valve in an excavator was built by using Pro/E and the turbulent flow in the model was simulated by means of CFD SIMPLEC techniques.The results showed that in addition to the pressure drop in both the main valve port and the conduit between the inlet and the check valve,there is a significant pressure drop in the passage between the check valve port and the outlet.The pressure drop is proportional to the axial length of the passage;however,it is less affected by the angle of the passage.The drop is inversely proportional to the eddy scale and the number of vortex cores.The pressure drop in the multi-way valve is measured as well,and the predicted drop is consistent with the experimental observations,suggesting the findings based on the analyzed results are reliable.
出处
《排灌机械工程学报》
EI
北大核心
2013年第5期428-433,共6页
Journal of Drainage and Irrigation Machinery Engineering
基金
福建省科技重大专项专题项目(2011HZ0006-1)
关键词
流道
多路阀
挖掘机
流场
压力损失
conduit
multi-way valve
excavators
flow field
pressure drop
