Simulation Research on Double-Action Variable Displacement Mechanism Based on Flow Pulse Width Modulation Technology

The realization of double-action variable pump with plunger pump requires complex variable mechanism, and the new digital pump also has the defects of low control accuracy and low response speed. This paper presents a new double-action variable mechanism based on flow pulse width modulation technolo...

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Bibliographic Details
Published in2023 9th International Conference on Fluid Power and Mechatronics (FPM) pp. 1 - 6
Main Authors Xiuwen, Xu, Yan, Ren, Wei, Xiang Jia, Jian, Ruan
Format Conference Proceeding
LanguageEnglish
Published IEEE 18.08.2023
Subjects
Accuracy
Double-action variable displacement pump
Fluids
Mechatronics
Oils
Pumps
PWM
Rotary valve
Simulation
Switches
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Summary:The realization of double-action variable pump with plunger pump requires complex variable mechanism, and the new digital pump also has the defects of low control accuracy and low response speed. This paper presents a new double-action variable mechanism based on flow pulse width modulation technology, which is similar to a three-position four-way switching valve and can realize double-action variable function in combination with the constant displacement pump. The unique saw tooth groove structure on the valve sleeve of the double-action variable mechanism can cooperate with the rhombic windows on the spool to form a periodically changing through flow hole when rotating, so that the oil is discretized and exhibits signal-like behavior. By changing the duty cycle of PWM wave through the axial displacement of the spool, the output effective flow can be adjusted. The simulation results show that the new mechanism with compact structure can meet the demand of double-action variable output.
DOI:10.1109/FPM57590.2023.10565523