Analyzing Viscous Heating of Spool Valve Using Fluid-solid Interaction(FSI) Method
-
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。Abstract: In a middle-and high-pressure system, viscous heating increases temperature greatly.The spool valve isdistorted by heat inflation.This paper establishes the three-dimensional CFD model and the steady-state FEA thermal model respectively.It uses the FSI method to calculate and analyze the velocity, temperature and distortion ofthe spool valve under different pressures, depths and openings.It finds out the variation trends of the highest temperature and the highest distortion.The analysis method and the simulation results in the paper may be useful forspool valve design.
-
Key words:
- spool valve /
- finite element method /
- viscos heating /
- fluid-solid interaction
-
[1] Eckert E, Faghri M. Viscous heating of high prandtl number fluids with temperature-dependent viscosity[J]. International Journal Heat and Mass Transfer, 1986, 29: 1177~1183 [2] Ju Y. Thermal conduction and viscous heating in microscale coquette flows[J]. Journal Heat Transter, 2000, 122 (4): 817~818 [3] 陶文铨. 数值传热学 (2 版) [M]. 西安: 西安交通大学出版社, 2004 [4] 尚仁操, 乔渭阳, 徐开福. 汽轮涡轮叶片气热耦合数值模拟研究[J]. 机械设计与制造, 2007,(2): 11~13 [5] 柯坚. 现代水压驱动技术[M]. 西南交通大学出版社, 2002 [6] 金朝铭. 液压流体力学[M]. 北京: 国防工业出版社, 1994 [7] 冀宏. 液压阀芯节流槽气穴噪声特性的研究[D]. 杭州: 浙江大学, 2005 -
![WeChat](/fileJXKXYJS/journal/article/jxkxyjs/2013/4/PIC/wechat_cn_5328.jpg)
计量
- 文章访问数: 370
- HTML全文浏览量: 36
- PDF下载量: 3
- 被引次数: 0