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[CN 201820464679.3] Hydraulic system for large truck wheel forging hydraulic press
[CN 201820464679.3] A hydraulic system for large truck wheel forging hydraulic press Title: A hydraulic system for large truck wheel forging hydraulic press Application number: CN 201820464679.3 Applicant: Tianjin Tianforging Press Co., Ltd. Application date: 2018-3-30 Patent type: Utility model This utility model discloses a hydraulic system for large truck wheel forging hydraulic presses, including: N main pumps, N main pump motors, quick down solenoid directional valve, down solenoid directional valve, return solenoid directional valve and PID controller; each main pump motor is connected with one main pump; the inlet of each main pump is connected with the oil tank, the outlets of N main pumps are connected with one end of a confluence pipeline after merging, and the other end of the confluence pipeline is connected with the master cylinder through the down pipeline and the return pipeline respectively; the quick down electromagnetic direction valve is installed on the down pipeline, the down electromagnetic direction valve is installed between the down pipeline and the confluence pipeline, and the return electromagnetic direction valve is installed between the return pipeline and the confluence pipeline. PID controller is electrically connected with the enable terminals of n main pump motors, one variable frequency motor and three electromagnetic direction valves respectively. The variable frequency motor is electrically connected with the auxiliary pump; The inlet of the auxiliary pump is connected with the oil tank, the outlet of the auxiliary pump is connected to the auxiliary cylinder through a side cylinder proportional spill valve.
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