负开口设计对于二维活塞泵机械效率的影响  

The Impact of Positive Overlap Design on the Mechanical Efficiency of Two-dimensional Piston Pumps

作　　者：黄煜 臧一人 徐晗瑜 邵威 刘丽 丁川 HUANG Yu;ZANG Yi-ren;XU Han-yu;SHAO Wei;LI Liu;DING Chuan(School of Engineering,Hangzhou City University,Hangzhou,Zhejiang 310015;School of Mechanical Engineering,Zhejiang University of Technology,Hangzhou,Zhejiang 310023;Wenzhou Ruijin Power Machinery Co.,Ltd.,Wenzhou,Zhejiang 325000)

机构地区：[1]浙大城市学院工程学院,浙江杭州310015 [2]浙江工业大学机械工程学院,浙江杭州310023 [3]温州锐劲动力机械有限公司,浙江温州325000

出　　处：《液压与气动》2024年第5期50-61,共12页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金青年科学基金(52205072);浙江省自然科学基金(LY21E050013)。

摘　　要：二维活塞泵因其传动为滚动摩擦,适合在电静液作动器中作为动力元件使用。然而,使用轴配流形式的二维活塞泵会受到内泄的影响,在高负载下容积效率表现不佳,因此该泵经常采用负开口设计。为探究二维活塞负开口设计对于泵机械效率的影响,分别对泵的机械效率和腔内压力进行数学建模,探究负开口设计对于泵的腔内压力、输入力矩以及机械效率的影响。对比分析零开口和负开口两种二维活塞的试验,结果表明:二维活塞泵因其等加减速凸轮,使负开口设计对于其机械效率影响非常小,并且在2°遮盖量以内的负开口设计对于腔内压力的影响可以忽略,不需要担心困油效应,但又解决了内泄问题。The two-dimensional piston pump,due to its transmission mechanism based on rolling friction,is well-suited for use as a power element in electro-hydrostatic actuators.However,two-dimensional piston pumps employing shaft distribution are prone to internal leakage,leading to poor volumetric efficiency under high loads.To address this issue,positive overlap designs are commonly adopted.In order to explore the impact of two-dimensional piston positive overlap designs on pump mechanical efficiency.Mathematical modeling of pump mechanical efficiency and chamber pressure is performed to investigate the effects of positive overlap design on chamber pressure,input torque,and mechanical efficiency.Comparative analysis of experimental results between zero clearance and positive overlap two-dimensional pistons yields the following conclusions:Due to the uniform acceleration and deceleration cam in the two-dimensional piston pump,positive overlap designs have minimal influence on its mechanical efficiency,and positive overlap within 2°have negligible effects on chamber pressure,eliminating concerns regarding trapped oil effects while effectively addressing the issue of internal leakage.

关 键 词：二维活塞泵 机械效率模型 负开口设计 试验研究 

分 类 号：TH137[机械工程—机械制造及自动化] TH122