为研究转柱泵瞬时流量变化规律的影响因素,设计转柱泵的计算模型.按照其结构与工作原理,从理论上推导出瞬时流量的计算公式,采用动网格技术和编译自定义函数,并结合k-ε湍流模型,对转柱泵内部流场进行非定常数值模拟.结果表明:转柱泵瞬时流量理论计算的推导结果与数值模拟结果基本吻合, 转柱泵的瞬时流量呈周期性脉动;泵进出口配流位置角度极为重要,若出口位置滞后,则产生闭死容积,液压腔内盘内压力迅速升高,并产生压力自由震荡,导致在数值模拟中瞬时流量每个周期会出现一段周期性、无规律的上下波动;除了外部尺寸参数以外,配流盘转角设置是转柱泵瞬时流量重要的影响因素.
Abstract
In order to investigate the characteristic of instantaneous flow rate of pillar pump, the calculating model was proposed to deduce the formulation of instantaneous flow rate. Based on shear stress transport turbulent (k-ε) model, the numerical simulation of the transient flow field of pillar pump was performed by dynamic mesh method and user defined function. The results show that the pulsation is periodic in the instantaneous flow rate of pillar pump, and the theoretical derivation is consistent with the numerical simulation with a period irregular vibration in every cycle in the numerical simulation. For the hysteresis of outlet position, a closed volume is generated with rapid increasing of pressure. The vibration of the pressure is generated by the abrupt increasing of pressure in valve plate. Beside the parameters of the pump, the corner of port plate is an important influencing factor on the instantaneous flow rate of pillar pump.
关键词
转柱泵 /
瞬时流量 /
理论推导 /
k-ε湍流模型 /
数值模拟
{{custom_keyword}} /
Key words
pillar pump /
instantaneous flow rate /
theoretical deviation /
turbulent (k-ε) model /
numerical simulation
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1]Fujiwara H,Harada T,Murakami S, et al. Rotary roller vane pump made of specificmaterials:USA,4362480[P].1982-12-07.
[2]聂如国. 滚柱转子泵:中国,ZL98244595[P].1999-10-20.
[3]张生昌,方宏生,邓鸿英,等.电动喷雾器用高效低噪双作用滚柱转子泵研制[J].排灌机械,2008,26(4): 18-21.
Zhang Shengchang,Fang Hongsheng, Deng Hongying, et al. Design of double action roller rotary pump for electric sprayer with high efficiency and low noise[J]. Drainage and Irrigation Machinery, 2008,26(4): 18-21. (in Chinese)
[4]张生昌,连加俤,邓鸿英,等. 滚柱转子油泵滚柱与配流盘间隙的计算[J].排灌机械工程学报,2012,30(1):35-39.
Zhang Shengchang,Lian Jiadi,Deng Hongying,et al. Calculation of gap between roller and valve plate for roller rotary oil pump[J].Journal of Drainage and Irrigation Machinery Engineering,2012,30(1):35-39. (in Chinese)
[5]王福军. 计算流体动力学分析—CFD软件原理与应用[M]. 北京:清华大学出版社,2004.
[6]何存兴.液压元件[M].北京:机械工业出版社,1982.
[7]邵飞,孔繁余,王文廷,等.基于动网格的单作用滑片泵流量特性分析[J].流体机械,2011,39(8):14-18.
Shao Fei, Kong Fanyu, Wang Wenting, et al. Analysis of flow characteristic in singleacting vane pump base on dynamic mesh method[J]. Fluid Machinery, 2011,39 (8): 14-18. (in Chinese)
[8]Riemslagh K, Vierendeels J, Dick E. An arbitrary LagrangianEulerian finitevolume method for the simulation of rotary displacement pump flow[J]. Applied Numberical Mathematics,2000,32:419-433.
[9]Issa R I.Solution of the implicitly discretised fluid flow equations by operatorsplitting[J]. Journal of Computational Physics,1986,62:40-65.
[10]Houzenaux G, Codina R. A finite method for the solution of rotary pumps[J]. Computers & Fluids, 2007,36(4):667-679.
[11]王力,史振东,张建亭,等.变量叶片泵配流盘的设计理论[J].机械工程与自动化,2005(2): 69-71.
Wang Li, Shi Zhendong,Zhang Jianting, et al.Design of port plate of variable vane pump[J].Mechanical Engineering & Automation, 2005(2): 69-71. (in Chinese)
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
基金
国家科技支撑计划项目(2013BAK06B02); 江苏省科技支撑计划项目(BE2012147); 江苏省研究生科研创新计划项目(CXXZZ12_0680)
{{custom_fund}}