液压阀内流阻研究与结构优化
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摘要
整体式多路阀因流道结构复杂、金属表面粗糙,阀口始终存在节流损失和内部流动阻力损失,而且阀芯和阀体之间的配合间隙仅为数微米,当工程机械在恶劣环境下作业,常会发生运动缓慢甚至卡滞现象。综合考虑液压挖掘机的实际工况,针对其复合动作,考虑了多路阀阀口各种不同形式的节流口和阀体内部的复杂流道结构,并对内部流动阻力发生的主要部位及损失大小等问题进行深入研究,对流道结构进行了仿真分析和优化设计。
The integral multichannel valve has a complex flow channel structure and rough metal surface,and the valve port always has the loss of throttle and the loss of internal flow resistance,and the gap between the valve core and the valve body is only a few microns. When the engineering machinery worked in a bad environment,it often became slow or even stagnating. Considering the actual conditions of hydraulic excavator,the composite action,the multichannel valve port and various forms of internal complex flow structure,in-depth researched the main parts,the internal flow resistance loss and the size of the channel,the simulation analysis and the optimized design of the flow channel structure were put forward.
The integral multichannel valve has a complex flow channel structure and rough metal surface,and the valve port always has the loss of throttle and the loss of internal flow resistance,and the gap between the valve core and the valve body is only a few microns. When the engineering machinery worked in a bad environment,it often became slow or even stagnating. Considering the actual conditions of hydraulic excavator,the composite action,the multichannel valve port and various forms of internal complex flow structure,in-depth researched the main parts,the internal flow resistance loss and the size of the channel,the simulation analysis and the optimized design of the flow channel structure were put forward.
引文
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[2]李艳杰,于安才,姜继海.挖掘机节能液压控制系统分析与应用[J].液压与气动,2010(8):69-74.
[3]王庆丰,张彦廷,肖清.混合动力工程机械节能效果评价及液压系统节能的仿真研究[J].机械工程学报,2005,41(12):135-140.
[4]林建亚,何存兴.液压元件[M].北京:机械工业出版社,1988.
[5]MEYER J J,STELSON K A,AUEYNE A G,et al.Power Management Strategy for a Parallel Hydraulic Hybrid Passenger Vehicle Using Stochastic Dynamic Programming[C]//Proceedings of7th International Fluid Power Conference,Aachen:2010.
[6]张利平.液压阀原理、使用与维护[M].北京:化学工业出版社,2005.
[7]马蕾.液压换向阀卡紧故障分析[J].液压气动与密封,2009,30(5):63-64.
[8]陈奎生,周雯娟,郭媛,等.基于FLUENT的液压滑阀阀芯卡紧力研究[J].机床与液压,2011,39(15):113-115.
[9]冀宏,王东升,丁大力,等.非全周开口滑阀阀口面积的计算方法[J].兰州理工大学学报,2008,34(3):48-51.
[10]冀宏,王东升,刘小平,等.滑阀节流槽阀口的流量控制特性[J].农业机械学报,2009,40(1):198-202.