Hydraulic control system of friction welding machine

Abstract

The invention discloses a hydraulic control system of a friction welding machine, comprising a two-position four-way reversing valve, a pressure-reducing valve, an oil cylinder, a three-position four-way reversing valve, a flow speed control valve, an electromagnetic relief valve and a pump source device. The hydraulic control system of the friction welding machine is characterized in that the pump source device comprises three constant-pressure variable pumps and a two-stage constant-pressure variable pump, pressure oil needed for activating a movable clamp oil cylinder, a rotary clamp oil cylinder and a clutch brake oil cylinder is respectively provided by the three constant-pressure variable pumps, and pressure oil needed for activating a pushing oil cylinder is provided by the two-stage constant-pressure variable pump. With respect to the pump source device, the combination of the three constant-pressure variable pumps and the two-stage constant-pressure variable pump is adopted to provide system oil pressure instead of a duplex constant delivery pump so as to reduce the power consumption of the system, stabilize the oil temperature and finally enable the hydraulic control system to stably operate. By measurement, in a C450-type friction welding machine adopting the hydraulic control system, the average power consumption of a circulating hydraulic system in a friction welding process is decreased by 50 percent from 874 KJ of the prior art to 436 KJ.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a hydraulic control system of a friction welding machine. Background technique [0002] refer to figure 2 , the existing friction welding machine hydraulic control system includes a two-position four-way reversing valve, a pressure reducing valve, an oil cylinder, a three-position four-way reversing valve, a speed regulating valve, an electromagnetic overflow valve and a pump source device. Linkage to control the clamping and releasing, clutching and braking of the friction welding machine, as well as the direction, speed and axial pressure of the sliding table. [0003] The pump source device 30 of this hydraulic control system uses the double quantitative pump 10 to provide pressure oil for the system, wherein the small pump of the double quantitative pump 10 provides pressure oil for the clamping and clutch system, and the pressure is determined by the electromagnetic overflow valve B1...

AI Technical Summary

Problems solved by technology

As a result, the oil temperature rises too fast, the useless power is large, and the power utilization rate is very low

At the same time, the temperature of the hydraulic oil directly affects the viscosity of the hydraulic oil. The higher the temperature, the smaller the viscosity, the greater the change of the corresponding system leakage, and the greater the change of the flow resistance of the pipeline, which leads to changes in various parameters of the system. The instability of the control accuracy is correspondingly reduced

If a cooling system is used to control the oil temperature, electricity proportional to the heat production is required, and a large amount of heat is discharged into the atmosphere, which is not conducive to environmental protection

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