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[CN 202110128913.1] An Electro-hydraulic Actuation System Applied to Hydraulic Press
[CN 202110128913.1] An Electro-hydraulic Actuation System Applied to Hydraulic Press Title: An Electro-hydraulic Actuation System Applied to Hydraulic Press Application Number: CN 202110128913.1 Applicant: Yanshan University Application Date: 2021-1-29 Patent Type: Invention Application The present invention proposes an Electro-hydraulic Actuation System Applied to Hydraulic Press, it includes servo motor, two-way quantitative small displacement hydraulic pump, upper fuel tank, electromagnetic switch valve, pressure protection valve, filling check valve, oil supplement check valve, asymmetric hydraulic cylinder, pressure sensor, displacement sensor and signal acquisition And control unit. The invention introduces an electromagnetic on-off valve to replace the hydraulic control one-way valve to actively allocate the oil in the rodless cavity of the asymmetric hydraulic cylinder of the electro-hydraulic actuation system, and uses a control algorithm to improve the position control accuracy and response speed of the system, and solves The problems of slow response of the hydraulic control one-way valve and the control performance of the hydraulic control one-way valve being affected by oil pressure fluctuations, and the configuration of the present invention reduces the pump, the integration degree of the actuator is further improved, and the cost is reduced.
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