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[CN 201721447361.6] Pumpless accumulator closed oil circuit for return of hydraulic machine
[CN 201721447361.6] A pump-free accumulator closed oil circuit for the return of a hydraulic machine Title: A pump-free accumulator closed oil circuit for the return of a hydraulic machine Application Number: CN 201721447361.6 Applicant: Zhongke Juxin Clean Energy Hot Forging Equipment Research and Development Co., Ltd. Application Date: 2017-11-2 Patent Type: Utility Model This utility model relates to a pump-free accumulator closed oil circuit for the return of a hydraulic machine, which connects the accumulator with the return hydraulic cylinder, and the space connected between the two is set as a closed space with a certain pressure. The pressure oil in the return hydraulic cylinder is communicated with the pump-less accumulator through the oil pipeline. The pressure of the pressure oil in the return hydraulic cylinder is the same as that of the pressure oil in the pump-less accumulator. There is always a certain pressure oil in the return hydraulic cylinder and has a certain pressure. When the sum of the acting force of the main hydraulic cylinder and the weight of the moving parts of the hydraulic press is greater than the pressure of the return hydraulic cylinder, the sum of the acting force of the main hydraulic cylinder and the weight of the moving parts of the hydraulic press is less than the pressure of the return hydraulic cylinder. Thereby minimizing the number of hydraulic pumps and the configuration of hydraulic components, stabilizing the return pressure, improving the pressure response speed, and minimizing equipment configuration and energy loss.
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