A valve group for a hydraulic coupling

Abstract

The invention discloses a valve set for a hydraulic coupling. The valve set comprises a valve body; the valve body is provided with a liquid inlet, a liquid outlet, a valve rod piston and an electromagnetic valve; the tail part of the valve rod piston is a back water cavity; the back water cavity is communicated with a water return way; the water return way controls connection and disconnection with a signal water way through the electromagnetic valve; an external filter is arranged on the water return way for fixedly connecting with the valve body, and is serially connected to the water return way; the external filter includes an outer shell and a filter element; the shell is provided with a water way II and a water way III; one end of the water way II is connected with an inlet of the filter element, and the other end is communicated with the water return way; one end of the water way III is communicated with an outlet of the filter element, and the other end is communicated with the back water cavity through the water return way; and a flow valve assembly is arranged in a liquid inlet of the valve set. Compared with a traditional valve set of a coupling, the valve set for the hydraulic coupling changes the structure design of a piston, removes 1 m small holes in the head and tail parts of the piston, reduces the machining cost, and improves the reliability; the external filter is added in the valve body for preferably filtering impurities in water to preferably protect the piston in the valve set, to reduce the damage of the piston and to achieve longer service life; and the liquid inlet is added with the flow valve assembly for guaranteeing stable liquid filling of the coupling without exceeding the standard, so that the safety and the stability of the valve set are improved.

Description

technical field [0001] The invention relates to a valve, in particular to a valve group for a hydraulic coupling. Background technique [0002] A valve-controlled liquid-filled hydraulic coupling is a hydraulic transmission device used to connect a power source (usually an engine or a motor) with a working machine and transmit torque by changing the liquid momentum torque. A general hydraulic coupling The working medium is water or turbine oil. The coupling must be equipped with a special valve group to control the quantitative addition of water. The existing valve group includes a liquid inlet, a liquid outlet, a valve stem piston, and a solenoid valve. Its structural design is The defect is that the control of the flow rate cannot be realized. There is no water filter device in the valve group. A 1mm hole is used for the water inlet of the piston back to the space water chamber. During normal use, the 1mm hole is often blocked by impurities in the water, causing the valve...

AI Technical Summary

Problems solved by technology

[0002] A valve-controlled liquid-filled hydraulic coupling is a hydraulic transmission device used to connect a power source (usually an engine or a motor) with a working machine and transmit torque by changing the liquid momentum torque. A general hydraulic coupling The working medium is water or turbine oil. The coupling must be equipped with a special valve group to control the quantitative addition of water. The existing valve group includes a liquid inlet, a liquid outlet, a valve stem piston, and a solenoid valve. Its structural design is The defect is that the control of the flow rate cannot be realized. There is no water filter device in the valve group. A 1mm hole is used for the water inlet of the piston back to the space water chamber. During normal use, the 1mm hole is often blocked by impurities in the water, causing the valve body to fail to close and damage the controlled equipment. The other 1mm The small hole processing process is complicated, the scrap rate is high, and the cost is high. The valve group has no safety valve, and the water pressure is too high, causing the inside of the coupler to be overcharged, which will damage the shaft seal and bearing inside the coupler.

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