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[CN 202110440440.9] Press hydraulic system with energy saving, high efficiency and low noise
[CN 202110440440.9] An energy-saving, high-efficiency and low-noise press hydraulic system Title: An energy-saving, high-efficiency and low-noise press hydraulic system Application number: CN 202110440440.9 Applicant: Tianjin Sino-German University of Applied Sciences Application date: 2021-4-23 Patent type: Invention application The present invention relates to an energy-saving, high-efficiency and low-noise press hydraulic system, including: oil tank, first oil suction filter, first direct-acting relief valve, first pressure sensor, three-position four-way electro-hydraulic reversing valve, first check valve, first two-position two-way electromagnetic ball valve, externally controlled one-way balance valve, first throttle, moving plate drive long-stroke hydraulic cylinder, moving plate drive hydraulic cylinder, second check valve, first pressure gauge, internal gear pump, AC servo motor and first coupling; second pressure sensor, second flow hole, second two-position two-way electromagnetic ball valve, second oil suction filter, three-phase asynchronous motor, second coupling, constant pressure variable plunger pump, second pressure gauge, electromagnetic overflow valve, third one-way valve, three-position four-way electromagnetic reversing valve, double one-way throttle valve, two-way hydraulic lock, second direct-acting overflow valve and short-stroke pressurizing hydraulic cylinder. The invention effectively reduces the manufacturing difficulty, greatly reduces the manufacturing cost, and has high efficiency, low heat generation and low noise.
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