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[CN 201620409683.0] Pump-controlled hydraulic system of hydraulic press
[CN 201620409683.0] Title of Pump-Controlled Hydraulic System of a Hydraulic Press: Application Number of Pump-Controlled Hydraulic System of a Hydraulic Press: CN 201620409683.0 Applicant: Shenyang Heavy Machinery and Heavy Mining Machinery Manufacturing Co., Ltd. Application Date: 2016-5-9 Patent Type: Utility Model A Pump-Controlled Hydraulic System of a Hydraulic Press, it overcomes the problems of high power consumption, low energy utilization rate, strong impact vibration, high failure rate and low production efficiency of the valve-controlled hydraulic system of the existing hydraulic press. It is characterized in that the liquid supply pump is connected with the main working cylinder through the first check valve. The liquid supply pump is connected with the two-way variable axial piston pump through the second check valve, and the main working cylinder and the return cylinder are directly controlled by the two-way variable axial piston pump to drive hydraulic motor beam, A pump return switching valve and a return accumulator are also installed between the two-way variable axial piston pump and the return cylinder, which have the beneficial effects of high system control accuracy and fast system response speed. The two-way variable axial piston pump is directly connected to the main working cylinder to drive the hydraulic motor beam to drop under pressure without additional power loss, and the pump is converted into a motor to absorb the pressure potential energy that needs to be discharged during the pressure and load relief process of the main working cylinder, while the energy is fully recycled and reused, the impact and vibration of the system are eliminated, and the system works smoothly, safely and reliably.
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