Friction welding machine constant voltage variable hydraulic control system

Abstract

The invention discloses a hydraulic control system of a friction welder, comprising a two-position four-way directional control valve, a pressure reducing valve, an oil cylinder, a three-position four-way directional control valve, a speed control valve, an electromagnetic relief valve and a pump source device. The invention is characterized in that the pump source device is composed of three constant-voltage variable capacity pumps and a two-stage constant-voltage variable capacity pump, pressure oil which is needed to move a gripper oil cylinder, a rotary gripper oil cylinder and a clutch and braking oil cylinder is respectively provided by the three constant-voltage variable capacity pumps, and the pressure oil which is needed to move a push action cylinder is provided by the two-stage constant-voltage variable capacity pump. Because the pump source device of the invention employs the combination of the three constant-voltage variable capacity pumps and the two-stage constant-voltage variable capacity pump which replace a double fixed displacement pump to provide the oil pressure of the system, power consumption of the system is reduced, oil temperature is stabilized, finally stable operation of the system is ensured. According to measurement, with the employment of the hydraulic control system, the average power consumption of a circulating hydraulic system in a friction welding procedure of a C450-typed friction welder is decreased from 874 kilojoubles of the exiting technology to 436kilojoubles, and the average power consumption is reduced by 50%.

Description

technical field [0001] The invention relates to a hydraulic control system of a friction welding machine. Background technique [0002] Referring 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. The linkage of each valve is used 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 B17 Control:...

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 and causes system failure. unstable, 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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