Study on Flow Rate and Steady Flow Force of Hydraulic Combination Valve Based on CFD

Shi, Jin Yan

doi:10.4028/www.scientific.net/amm.477-478.173

Cited by 4 publications

(2 citation statements)

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“…The steady-state flow force increases with the increase in flow rate [54]. Gao [55] and Zhang et al [56] analyzed the influence of steady-state flow force on the performance of large-flow directional control valves and concluded that the main reason for the problems in the operation of said valves was the change of steady-state flow force.…”

Section: Flow Ratementioning

confidence: 99%

Review of the Research on and Optimization of the Flow Force of Hydraulic Spool Valves

Sun

et al. 2023

Processes

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As one of the important factors affecting the stability of slide valves, the analysis and research of flow force are of great significance. In recent years, more and more experts and scholars have conducted research in this field, attempting to find methods to reduce or utilize the flow force of hydraulic spool valves. Flow force includes steady-state flow force and transient flow force, with steady-state flow force having the most significant impact on spool valves. The influencing factors of flow force are complex and diverse, including the cavitation phenomenon, shape of the throttling groove, and jet angle. At present, the main ways to reduce flow force are to design the structure of the spool valve, the structure of the valve sleeve, and the flow channel of the valve body. This article mainly reviews the definition, calculation methods, influencing factors, and methods for reducing the flow force of slide valves. This provides a new approach to reducing the flow force in hydraulic spool valves.

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Section: Flow Ratementioning

confidence: 99%

Review of the Research on and Optimization of the Flow Force of Hydraulic Spool Valves

Sun

et al. 2023

Processes

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“…If the flow difference is large when bearing different loads, the excavator has poor straight-line travel synchronization under relatively bad road conditions (such as smooth roads, gravel roads, muddy roads, etc.) [9][10][11][12][13][14] . Taking linear travel as an example, the AMESim simulation model for linear travel is shown in Figure 3 below.…”

Section: Research On the Matching Relationship Between Pressure Compe...mentioning

confidence: 99%

Research on Precise Flow Control and Anti-interference Performance of Load Sensitive Multi-way Valve with After-valve Compensation

Yuan

Zhang

et al. 2023

J. Phys.: Conf. Ser.

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Regarding a load-sensitive system with after-valve compensation, in the case of a single action or composite action, theoretically, the flow of each channel neither varies with the load pressure of this channel, nor is it affected by the flow of other channels, and the anti-interference performance is good. In fact, due to the influence of factors such as the flow passage of the valve body, the matching between the pressure compensation valve and the main spool, its flow control and anti-interference performance are difficult to achieve good results, which has a great impact on the synchronization, rapid action impact and micro motion characteristics of the main engine of construction machinery. This paper studies the simplification and analysis of the system pressure drop diagram, the matching characteristics between the pressure compensation valve and the main valve, accurate modeling and simulation technology, solves the problems of flow fine control and anti-interference performance, improves the flow control accuracy of a single action and compound action, and enhances the anti-interference performance. The real vehicle test shows that the self-developed multi-way valve for compensating for load sensitivity behind the valve is installed on the 6T small excavation. The initial position of the excavator’s track is aligned along a straight line. After the test runs for 20 meters, the track offset is measured. The fast forward offset is only 20mm, and the slow forward offset is only 7mm.

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An Electrohydraulic Actuation Scheme Using Novel Piezoelectrically-Actuated Nozzle Flapper Valve

Wang

2018

2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)

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Study on Flow Rate and Steady Flow Force of Hydraulic Combination Valve Based on CFD

Cited by 4 publications

References 0 publications

Review of the Research on and Optimization of the Flow Force of Hydraulic Spool Valves

Review of the Research on and Optimization of the Flow Force of Hydraulic Spool Valves

Research on Precise Flow Control and Anti-interference Performance of Load Sensitive Multi-way Valve with After-valve Compensation

An Electrohydraulic Actuation Scheme Using Novel Piezoelectrically-Actuated Nozzle Flapper Valve

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