Oil injection and air exhaust system of electro-hydraulic actuating mechanism

Abstract

The invention provides an oil injection and air exhaust system of an electro-hydraulic actuating mechanism. The problem to be solved is how to improve the oil injection efficiency. The system is characterized in that each oil cavity of an oil cylinder is provided with an oil discharging and air exhaust port; an oil inlet of an oil tank, a gear pump, a filter, an oil injection port of an electro-hydraulic actuator, the oil discharging and air exhaust ports of the oil cylinder and oil return ports of the oil tank form a closed-loop oil circuit; an oil circuit between the gear pump and the filterserves as an oil path formed in a main oil circuit block; the front part of an oil circuit between the filter and the electro-hydraulic actuator is an oil circuit from an oil path formed in the mainoil circuit block to an oil outlet of the main oil circuit block, and the rear part of the oil circuit between the filter and the electro-hydraulic actuator is an oil supply hose; an oil circuit between each oil discharging and air exhaust port of the oil cylinder and the corresponding oil return port of the oil tank is a transparent oil pipe; each transparent oil pipe is provided with a stop valve; and the gear pump and the hydraulic oil filter are installed on the main oil circuit block.

Description

technical field [0001] The invention relates to an electro-hydraulic actuator, in particular to an oil injection and exhaust system for the electro-hydraulic actuator. Background technique [0002] The electro-hydraulic actuator (see CN 204226323U) composed of the driving cylinder 3 and the integrated electro-hydraulic actuator 4 is a closed oil system. In the process of manufacture and maintenance, to fill such an oil system with oil, you cannot use a dispenser or directly pour the oil into the oil tank like filling an open system. Since there is pressure at the suction port of the pump in the closed system, it is necessary to discharge the air in the system to inject oil into the system, and it needs multiple reciprocations to complete. The current method used is to fill the system with an oil gun, but this method has the following problems: first, the work efficiency is low, and the oil injection speed is only a few milliliters of oil per second; secondly, when the oil g...

AI Technical Summary

Problems solved by technology

The current method used is to fill the system with an oil gun, but this method has the following problems: first, the work efficiency is low, and the oil injection speed is only a few milliliters of oil per second; secondly, when the oil gun is filled with hydraulic oil, the oil It is easy to be polluted by the environment, causing pollutants to enter the system, causing system components to jam, and the contaminated oil is easy to block the oil injection port, resulting in misoperation

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