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当前位置: 首页 > 文章 > 双排油轴向柱塞泵配流特性理论分析与试验 农业机械学报 2017 (6) 373-380+412
Position: Home > Articles > Theoretical Analysis and Experiment on Flow Allocation Characteristics of Dual Discharging Axial Piston Pump Transactions of the Chinese Society for Agricultural Machinery 2017 (6) 373-380+412

双排油轴向柱塞泵配流特性理论分析与试验

作  者：
张晓刚;闫政;权龙;刘勇辰
单  位：
厦门大学能源学院;太原理工大学新型传感器与智能控制教育部与山西省重点实验室
关键词：
轴向柱塞泵;双排油;配流特性;压力脉动
摘  要：
通过改变缸体结构、柱塞数、端盖油路、配流盘形状等,设计了双排油内外环并联配流结构的轴向柱塞泵,实现了单柱塞泵两路高压供油。针对单环柱塞数减少,腔内压力冲击增大,脉动变大等问题,对配流结构进行重新设计。在排油腰形槽和吸油腰形槽过渡区取消卸荷槽,利用加大配错角,在排油完毕未接通吸油时,腔内封闭体积增大,未排尽的高压油液压力降低;在吸油腰形槽和排油腰形槽过渡区,排油卸荷槽利用阶梯变化通流面积代替原连续变化的通流面积,削弱了卸荷槽几何形状要求。重新设计后的双排油配流结构,以45 mL轴向柱塞泵结构为参考,对配流结构进行了理论分析,建立了双排油轴向柱塞泵仿真模型。以单柱塞腔内压力冲击、输出流量进行分析研究,得外环压力冲击小,与传统配流结构相比较双排油输出口压力脉动变化率变小,并试制双排油轴向柱塞泵。对试制泵进行压力脉动测试、容积效率测试和噪声测试,结果表明,与45 mL轴向柱塞泵进行对比,压力脉动降低了约30%,噪声也降低,容积效率不低于0.92。该双排油轴向柱塞泵可以代替双联泵,使系统结构简化,能耗降低。
译  名：
Theoretical Analysis and Experiment on Flow Allocation Characteristics of Dual Discharging Axial Piston Pump
作  者：
ZHANG Xiaogang;YAN Zheng;QUAN Long;LIU Yongchen;Key Laboratory of Advance Transducers and Intelligent Control System,Ministry of Education and Shanxi Province,Taiyuan University of Technology;College of Energy,Xiamen University;
关键词：
axial piston pump;;dual discharging;;flow distribution characteristics;;pressure pulsation
摘  要：
When providing two-way independent high-pressure high-flow oil sources,hydraulic system generally adopts two separate piston pumps or coaxial ones in series,causing complex structure and high cost.Therefore,single piston pump was proposed to achieve two-way high-pressure oil supply.Axial piston pump was designed with dual discharging inter-outer ring parallel allocation structure by changing cylinder structure,piston number,cap circuit and valve plate shape.Flow allocation structure was redesigned due to decreased single ring piston number,increased pressure shock and fluctuation in the chamber.Relief notch was cancelled in transition region from oil-discharging to oil-absorbing waist slots.After that,mismatch angle was increased to enlarge closed volume in chamber and reduce the pressure of unexhausted high-pressure oil in the interval between oil extraction and absorption.In transition region from oil-absorbing to oil-discharging waist slots,stepped flow area was used to replace original continuous flow area to weaken geometry requirements of relief notch.The optimized dual discharging flow allocation structure was conducted with theoretical analysis to establish dual discharging axial piston pump simulation model based on 45 mL axial piston pump structure.There was small pressure shock in outer race by analyzing pressure shock and output flow in single piston chamber.Compared with traditional flow allocation structure,dual discharging oil output had smaller pressure fluctuation rate.Based on this,the designed dual discharging axial piston pump was piloted.The pilot dual discharging oil pump was compared with the original 45 mL pump through pressure fluctuation,volumetric efficiency and noisetests.Result showed that the former had lower pressure fluctuation(decreased by 30%) and noise level,while its volumetric efficiency was not smaller than 92%.In general,the dual discharging axial piston pump can replace duplex pump to simplify system structure and reduce energy consumption.This new pump can also be used in closed circuit and differential cylinder hydraulic systems to make the system simpler and cost-effective.

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