新型流量自平衡泵控非对称液压缸运行特性试验研究

doi:10.3901/JME.2020.08.257

机械工程学报 ›› 2020, Vol. 56 ›› Issue (8): 257-264.doi: 10.3901/JME.2020.08.257

• 交叉与前沿 • 上一篇

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新型流量自平衡泵控非对称液压缸运行特性试验研究

赵斌^1,2,3, 郭伟伟¹, 葛磊^1,2, 郝云晓^1,2, 权龙^1,2

1. 太原理工大学机械与运载工程学院太原 030024;
2. 太原理工大学新型传感器与智能控制教育部和山西省重点实验太原 030024;
3. 浙江大学流体动力与机电系统国家重点实验室杭州 310027

收稿日期:2019-09-10 修回日期:2020-01-10 出版日期:2020-04-20 发布日期:2020-05-28
通讯作者: 权龙(通信作者),男,1959年出生,博士,教授,博士研究生导师。主要研究方向为电液伺服及比例控制技术。E-mail:quanlong@tyut.edu.cn
作者简介:赵斌,男,1981年出生,博士,副教授,硕士研究生导师。主要研究方向为工程装备电液节能系统、液压元件等。E-mail:zbtyut@126.com
基金资助:
国家自然科学基金（51605322）、山西省重点研发计划（201803D121098）、山西省回国留学人员科研（2017-033）和流体动力与机电系统国家重点实验室开放基金课题（GZKF-201815）资助项目。

Experiment Study on Operation Characteristics of New Flow Self-balancing Pump Controlled Asymmetric Hydraulic Cylinder

ZHAO Bin^1,2,3, GUO Weiwei¹, GE Lei^1,2, HAO Yunxiao^1,2, QUAN Long^1,2

1. College of Mechannical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024;
2. Key Lab of Advanced Transducers and Intelligent Control System of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024;
3. State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027

Received:2019-09-10 Revised:2020-01-10 Online:2020-04-20 Published:2020-05-28

摘要/Abstract

摘要： 降低液压系统能耗，最直接有效的方法是采用无节流损失的闭式泵控技术，通过改变泵转速或排量，使泵输出流量和压力与负载匹配。但对于应用面超80%的非对称液压缸，存在液压泵两个油口流量与液压缸两腔流量不一致的问题，必须增设复杂的补油回路，并且当负载或运行速度方向发生变化时，需要补油回路快速准确切换，否则容易导致吸空和大的压力冲击，尤其是轻载工况，两腔压力接近时，系统稳定性更差。为了解决泵控系统的这些问题，创新设计出一种可平衡非对称液压缸流量的三配流窗口流量自平衡液压泵，结构上实现液压泵与液压缸流量始终一致，不需要增设复杂的补油回路即可实现液压缸平稳驱动。为验证新设计方案可行性，首先从原理上分析流量自平衡液压泵的工作特性，并设计制造出试验样机。在此基础上，研究采用制造的液压泵驱动非对称液压缸的运行特性。结果表明，采用新设计流量自平衡液压泵不需要增设复杂的大流量补油回路，即可平稳驱动非对称液压缸；当控制腔发生变化时，液压缸速度与转速之比变化非常小。

关键词: 阀控系统, 闭式泵控, 补油回路, 节能

Abstract: The most direct and effective way to reduce the energy consumption of hydraulic system is to adopt closed pump control technology. By changing the speed or displacement of the pump, the output flow and pressure of the pump match the load. But for asymmetric hydraulic cylinders whose application area is more than 80%, there is the problem of inconsistency between the flow rate of two orifices of the hydraulic pump and that of two chambers of the hydraulic cylinder, which leads to the need to add complex oil-filling circuits. When the load or the direction of the running speed changes, the oil-compensation circuits need to be switched quickly and accurately. Otherwise, it is easy to lead to suction and large pressure shock. The stability of the system is worse when the pressure of the two chambers is close to each other. In order to solve these problems of pump control system, a flow self-balancing hydraulic pump with three distributing windows is designed, which can balance the flow of cylinder. The structure realizes that the flow of hydraulic pump is consistent with that of hydraulic cylinder all the time, and the stable driving of hydraulic cylinder can be realized without adding complex oil supply circuit outside. In order to verify the feasibility of the new design scheme, the working characteristics of the flow self-balancing hydraulic pump are analyzed in principle, and the test prototype is designed and manufactured. On this basis, the operation characteristics of asymmetric cylinders driven by manufactured hydraulic pumps are studied. The results show that the new designed flow self-balancing hydraulic pump can drive the asymmetrical hydraulic cylinder smoothly without adding complicated large flow oil supply circuit; when the control chamber changes, the ratio of velocity to rotational speed of the hydraulic cylinder changes very little.

Key words: valve controlled system, closed pump controlled, oil-compensation circuits, energy saving

中图分类号:

TH137

赵斌, 郭伟伟, 葛磊, 郝云晓, 权龙. 新型流量自平衡泵控非对称液压缸运行特性试验研究[J]. 机械工程学报, 2020, 56(8): 257-264.

ZHAO Bin, GUO Weiwei, GE Lei, HAO Yunxiao, QUAN Long. Experiment Study on Operation Characteristics of New Flow Self-balancing Pump Controlled Asymmetric Hydraulic Cylinder[J]. Journal of Mechanical Engineering, 2020, 56(8): 257-264.

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新型流量自平衡泵控非对称液压缸运行特性试验研究

Experiment Study on Operation Characteristics of New Flow Self-balancing Pump Controlled Asymmetric Hydraulic Cylinder

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