配流阀结构特征对微型高压柱塞泵流量输出特性的影响  

Influence of Distributing Valve Structure Characteristics on Flow OutputCharacteristics of Micro High Pressure Piston Pump

作　　者：刘雨聪 曹文斌[1] 杨国来[1,2] 冒越颖 赵天昊 房瑞清 LIU Yucong;CAO Wenbin;YANG Guolai;MAO Yueying;ZHAO Tianhao;FANG Ruiqing(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou Gansu 730050,China;Key Laboratory of Fluid Power and Electromechanical Systems,Zhejiang University,Hangzhou Zhejiang 310027,China)

机构地区：[1]兰州理工大学能源与动力工程,甘肃兰州730050 [2]浙江大学流体动力与机电系统重点实验室,浙江杭州310027

出　　处：《机床与液压》2023年第21期163-169,共7页Machine Tool & Hydraulics

基　　金：国家重点研发计划(2022YFC2805702);甘肃省自然科学基金项目(20JR10RA191)。

摘　　要：为满足航空泵高功率密度化要求,微型高压柱塞泵采用阀配流方式能够有效减少泄漏,提高容积效率。针对影响微型高压柱塞泵流量输出特性的主要因素,建立阀配流微型高压柱塞泵数学模型,通过AMESim搭建不同结构的单向阀配流模型,将球阀、锥阀、平板阀等不同形式的单向阀芯进行不同组合结构的建模及仿真试验,对微泵的余隙容积、斜盘倾角、负载压力及单向阀的弹簧刚度、阀芯质量等影响因素进行仿真分析。结果表明:在现有结构下,吸液阀和排液阀均为平板阀时是最优配流阀组合形式;微泵在变转速工况下容积效率稳定,阀芯质量对配流阀迟滞性影响较小;增大斜盘倾角及减小负载压力和余隙容积能够有效改善配流阀开启滞后角,进而提高容积效率。In order to meet the high power density requirements of aviation pumps,valve flow distribution is adopted to effectively reduce leakage and improve volume efficiency of micro high pressure piston pump.Aiming at the main factors affecting the flow output characteristics of micro high pressure piston pump,the mathematical model of micro high pressure piston pump with valve distribution was established,and flow distribution models of check valves with different structures were built by AMESim.The modeling and simulation experiments of ball valve,cone valve,plate valve and other check spool valve forms with different combination structures were carried out.The influence factors such as micro-pump clearance volume,swash plate angle,load pressure,check valve spring stiffness and spool mass were simulated and analyzed.The results show that the valve combination form is the best when the inlet valve and the discharge valve are both plate valves under the existing structure;the micro-pump volume efficiency is stable under variable speed condition,and the spool mass has little influence on the distribution valve hysteresis;increasing the swash plate angle or decreasing the load pressure and the clearance volume can effectively improve the valve opening lag angle,and then improve the volume efficiency.

关 键 词：微型柱塞泵 高压 配流阀 容积效率 迟滞性 

分 类 号：TH137.52[机械工程—机械制造及自动化]