Electrohydraulic controls for hydraulic distributors

Abstract

The invention relates to the field of hydraulic technology, in particular to an electro-hydraulic control device for a hydraulic distributor. An electro-hydraulic control device for a hydraulic distributor. The oil inlet of the hydraulic distributor is connected to the host oil circuit. The two ends of the valve stem of the hydraulic distributor are respectively connected to hydraulic push rods. The oil return circuit of the distributor is connected to an energy storage oil circuit through the electromagnetic switch valve b, the electromagnetic switch valve a and the electromagnetic switch valve b are connected in series, and the control oil circuit formed between the two is respectively connected to the power input port of the hydraulic push rod , there is an accumulator on the energy storage oil circuit, and the host oil circuit is connected to the energy storage oil circuit through the connected pressure reducing valve and check valve; The element is connected with the energy storage oil circuit; the hydraulic push rod is provided with a displacement sensor, and the displacement sensor is controlled by an electronic control unit. The invention has the beneficial effects of high control precision, fast execution speed, safety and reliability, and convenient use.

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to an electro-hydraulic control device for a hydraulic distributor. Background technique [0002] At present, hydraulic distributors are generally operated manually, and are controlled by purely mechanical actuators. The execution response is lagging, the accuracy is poor, the adjustment and calibration are cumbersome, and it is inconvenient to use. Automation and intelligence cannot be realized through electronic control technology. [0003] The electronically controlled distributor announced in Chinese utility model patent ZL201120420692.7 uses an electromagnet or a motor and a screw nut mechanism as a linear actuator, and the valve stem of the distributor is manipulated to move up, down, neutral, and floating through a sensor and an electronic control unit. Wait for the set position to realize the intelligent control of the hydraulic lifter. However, it requires a lot of ene...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an electro-hydraulic control device for a hydraulic distributor, which uses the power of the host hydraulic system as the energy source for the movement and manipulation of the valve stem of the hydraulic distributor, and solves the problem that the host oil circuit of the hydraulic system cannot be operated in an unloaded state. The movement of the valve stem of the hydraulic distributor provides enough driving force, so that the hydraulic distributor cannot be operated normally.

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