文章基本信息

标题：Design, Implementation and Evaluation of a Pump-Controlled Circuit for Single Rod Actuators
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作者：Ahmed Imam
期刊名称：Actuators
电子版ISSN：2076-0825
出版年度：2017
卷号：6
期号：1
页码：10
DOI：10.3390/act6010010
语种：English
出版社：MDPI Publishing
摘要：Pump-controlled hydraulic circuits are more efficient than valve-controlled circuits, as they eliminate the energy losses due to flow throttling in valves and require less cooling effort. Presently existing pump-controlled solutions for single rod cylinders encounter an undesirable performance during certain operating conditions. This paper investigates the performance issues in common pump-controlled circuits for the single rod actuators. Detailed analysis is conducted that identifies these regions in a load-velocity plane and the factors affecting them. The findings are validated by experimental results. A new design is then proposed that employs a limited throttling valve alongside two pilot operated check valves for differential flow compensation to improve the performance. The valve is of the flow control type and is chosen to have a throttling effect over critical regions; it has the least throttling over other operating regions, thus maintaining efficiency. Experimental work demonstrates improved performance in a full operating range of the actuator as compared to a circuit that uses only the pilot-operated check valves. This circuit is energy efficient and capable of recuperating energy.
关键词：pump-controlled actuation; single rod actuator; counterbalance valve; efficiency pump-controlled actuation ; single rod actuator ; counterbalance valve ; efficiency