摘要
高水基乳化液泵作为煤矿综采大型支护装备的动力源,其向高压大流量方向的发展使得传统基于全锥锥阀简化模型与动量定理的液动力计算方法已无法满足具有复杂结构的乳化液泵配流阀设计需求。针对此类泵固有的进液阀启闭滞后现象,在配流过程,通过理论分析与AMESim仿真实验得到进液阀芯启闭分别滞后6°与15°,并基于此将进液阀芯运动过程划分为开启滞后阶段、开启全开阶段、关闭滞后阶段,分别建立了阀芯动力学模型。此类泵进液阀阀芯普遍采用下部导向三爪翼型结构且阀座带锥,由此导致配流过程流场参数激变现象。针对此,创建包含进液阀阀芯表面上、中、下游的3个控制体积体系,并基于此开展了进液阀阀芯所受稳态液动力的理论分析;以AMESim仿真实验得到的进液阀阀芯运动规律为基础,开展了乳化液泵进液过程的流场分析与计算。结果表明:进液阀阀芯受到的液动力最大值出现在柱塞速度为1.943 m/s、阀芯开度全开的位置,最小值出现在柱塞速度较低、阀芯即将关闭的结束阶段,即理论液动力最大值为6.63 N、最小值为0.12 N,而仿真液动力最大值为5.5 N,最小值为0.09 N,验证了模型的准确性,为后续将大流量乳化液泵中的进液阀芯改造为数字式阀芯的研究奠定了基础。
As the power source of large-scale shoring and protecting equipment in the comprehensive mechanized coal mining,the development of high water-base emulsion pump in the direction of high pressure and large flow makes the conventional hydrodynamic calculation method based on the simplified model of full taper valve and momentum theorem unable to meet the design requirements of emulsion pump distribution valve with complex structure.In view of the inherent hysteresis of opening and closing of the inlet valve of this kind of pump,the hysteresis between the opening and closing of the inlet valve spool is 6°and 15°respectively through theoretical analysis and AMESim simulation experiments in the distribution process.Based on this,the movement process of the inlet valve spool was divided into opening hysteresis stage,fully opening stage and closing hysteresis stage,and the corresponding dynamic models on valve spool was established,respectively.The inlet valve spool regarding such pumps generally adopts the lower-guided three-claw airfoil structure and the valve seat with cone,which results in sudden changes in flow field parameters during the flow distribution process.In response,three control volume systems covering the upstream,middle and downstream of inlet valve spool surface were created,and the theoretical analysis on steady flow force upon inlet valve spool was conducted on this basis.Based on the movement law of the inlet valve spool acquired through AMESim simulation experiment,the analysis and calculation were conducted on the flow field during the liquid feeding process of emulsion pump.The results show that the maximum hydrodynamic force of inlet valve spool occurs at the position when plunger velocity is 1.943 m/s and the valve spool is fully open,and the minimum hydrodynamic force occurs at the end stage when the plunger velocity is low and valve spool is about to close.That is,the theoretical hydrodynamic maximum value is 6.63 N and the minimum value is 0.12 N,while the simulated hydrodynamic maximum value is 5.5 N and the minimum value is 0.09 N.The accuracy of the model is verified,laying the foundation for subsequent research on transforming the inlet valve spool into a digitized one in a high-flow emulsion pump.
作者
陈吉顺
张占东
赵文超
韦春辉
CHEN Jishun;ZHANG Zhandong;ZHAO Wenchao;WEI Chunhui(Mechanical and Electrical Engineering College,Shanxi Datong University,Datong Shanxi 037003,China)
出处
《机床与液压》
北大核心
2025年第14期163-170,共8页
Machine Tool & Hydraulics
基金
2022年度山西省基础研究计划(自由探索类)第一批项目(202303021211325)
2021年度山西省基础研究计划(自由探索类)第二批项目(202103021224313)
2023年度山西省研究生教育创新项目(2023SJ289)
2022年度大同市科技计划项目(2022002,2022052)
山西大同大学研究生教育创新项目(23CX06,23CX38)。
关键词
乳化液泵
配流阀
稳态液动力
双锥台形锥阀
emulsion pump
flow distribution valve
steady-state hydrodynamic forces
cone valve with two cone tables
作者简介
陈吉顺(1999-),男,硕士研究生,研究方向为流体传动与控制。E-mail:dt7355608@163.com;通信作者:张占东(1981-),男,硕士,副教授,研究方向为流体传动与控制。E-mail:dtzzd@163.com。
