Research and improvements on key characteristics of pilot-assisted counterbalance valve used in hydraulic luffing system

IF 2.3 3区工程技术 Q2 ENGINEERING, MECHANICAL

Flow Measurement and Instrumentation Pub Date : 2025-01-16 DOI:10.1016/j.flowmeasinst.2025.102819

Chengzhen Wang , Yongzhe Hou , Haibo Xie , Shutong Yang , Zhang Wei

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Abstract

This paper reports the work principle of pilot-assisted counterbalance valve based on hydraulic-mechanical feedback principle, the mathematical modeling was built up. According to the load characteristics and application requirements of mobile crane luffing system, flow control characteristics, over-compensation feature, and influence of back-pressure on main flow were analyzed with AMESIM simulation. Aiming at the shortcomings of counterbalance valve, a segmented structure of pilot spool with pre-compensation port was proposed to improve fine-tuning performance. In order to improve the over-compensation characteristics, the key parameters were analyzed and optimized, and the method of using the gap throttling at the fast closing orifice to compensate feedback flow was proposed, to improve the anti-stall characteristics when the back-pressure rises, a back-pressure compensation structure was designed. The optimized valve was tested on a test bench and mobile crane, experiment results show that the optimized valve has good fine-tuning and proportional control characteristics, the over-compensation feature was greatly improved, compensation rate is greater than 70 %, the back-pressure compensation function was effective, the main flow will be lower under a higher back-pressure and the pilot control region is almost unchanged.

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来源期刊

Flow Measurement and Instrumentation 工程技术-工程：机械

CiteScore

4.30

自引率

13.60%

发文量

123

审稿时长

6 months

期刊介绍： Flow Measurement and Instrumentation is dedicated to disseminating the latest research results on all aspects of flow measurement, in both closed conduits and open channels. The design of flow measurement systems involves a wide variety of multidisciplinary activities including modelling the flow sensor, the fluid flow and the sensor/fluid interactions through the use of computation techniques; the development of advanced transducer systems and their associated signal processing and the laboratory and field assessment of the overall system under ideal and disturbed conditions. FMI is the essential forum for critical information exchange, and contributions are particularly encouraged in the following areas of interest: Modelling: the application of mathematical and computational modelling to the interaction of fluid dynamics with flowmeters, including flowmeter behaviour, improved flowmeter design and installation problems. Application of CAD/CAE techniques to flowmeter modelling are eligible. Design and development: the detailed design of the flowmeter head and/or signal processing aspects of novel flowmeters. Emphasis is given to papers identifying new sensor configurations, multisensor flow measurement systems, non-intrusive flow metering techniques and the application of microelectronic techniques in smart or intelligent systems. Calibration techniques: including descriptions of new or existing calibration facilities and techniques, calibration data from different flowmeter types, and calibration intercomparison data from different laboratories. Installation effect data: dealing with the effects of non-ideal flow conditions on flowmeters. Papers combining a theoretical understanding of flowmeter behaviour with experimental work are particularly welcome.