摘要
在中高压液压系统的使用过程中,液压滑阀经常出现阀芯移动操作困难和阀芯磨损,甚至造成阀芯和阀套间卡死的现象,这是因为液压滑阀因节流产生的粘性加热使油流温升显著,阀芯阀套受热膨胀不同,从而减小了阀套与阀芯间的配合间隙。针对这一现象建立了计算流体动力学(Computational fluid dynamics,CFD)三维模型和稳态传热有限元模型(Finite element analysis,FEA),并利用流固耦合(Fluid-solid interaction,FSI)计算了U型节流阀在不同工作压力下,不同节流槽口宽度和深度,以及不同开口度的速度场和阀芯表面温度场,并对计算结果进行了分析,得出阀芯在各种情况下的最高温度和最大变形量的变化趋势。
In a middle-and high-pressure system, viscous heating increases temperature greatly. The spool valve is distorted by heat inflation. This paper establishes the three-dimensional CFD model and the steady-state FEA ther- mal model respectively. It uses the FSI method to calculate and analyze the velocity, temperature and distortion of the spool valve under different pressures, depths and openings. It finds out the variation trends of the highest tem- perature and the highest distortion. The analysis method and the simulation results in the paper may be useful for spool valve design.
出处
《机械科学与技术》
CSCD
北大核心
2013年第4期533-537,共5页
Mechanical Science and Technology for Aerospace Engineering
关键词
液压滑阀
有限元
粘性
热分析
spool valve
finite element method
viscos heating
fluid-solid interaction
