Underwater hydraulic servo valve pressure compensation structure

Abstract

The invention belongs to the field of electrohydraulic control engineering and particularly relates to an underwater hydraulic servo valve pressure compensation structure. A filter compensator which keeps inside and outside pressures of a servo valve shell consistent is mounted on a servo valve and provided with a pressure compensation hole. A screen which filters fluid flowing into the servo valve shell is fitted in the pressure compensation hole. The filter compensator comprises a screen cover plate, a screen and a screen base. One end of the screen base is fitted into a mounting hole arranged in a seal end cap of the servo valve, and the other end of the screen base is connected with the screen cover plate. The screen is compressed onto an inner step of the screen base through the screen cover plate. The screen cover plate and the screen base are both provided with pressure compensation holes. Through the use of the underwater hydraulic servo valve pressure compensation structure, the problem that the current electrohydraulic servo valve is unable to operate in the deep-sea high pressure environment is solved; the underwater hydraulic servo valve pressure compensation structure has the advantages of compact structure, reliable performance, low failure rate, low cost, ease of implementation and the like.

Description

technical field [0001] The invention belongs to the field of electro-hydraulic control engineering, in particular to a pressure compensation structure of an underwater hydraulic servo valve. Background technique [0002] At present, in the fields of offshore oil and gas exploration and development, most underwater operations have the characteristics of high pressure and heavy load. Hydraulic drive has the advantages of strong load capacity, high load / self-weight ratio, and full-sea deep operation can be realized through pressure compensators. In the composition of the hydraulic system, the key of the hydraulic servo valve is the hydraulic control. However, in order to ensure the cleanliness of the internal environment, most of the servo valves use a metal shell to form a sealed cabin to seal the electromagnetic torque motor. Due to the cavity structure of the sealed cabin, resulting in The structural strength and sealing are unreliable under the condition of bearing external...

AI Technical Summary

Problems solved by technology

In the composition of the hydraulic system, the key of the hydraulic servo valve is the hydraulic control. However, in order to ensure the cleanliness of the internal environment, most of the servo valves use a metal shell to form a sealed cabin to seal the electromagnetic torque motor. Due to the cavity structure of the sealed cabin, resulting in Unreliable structural strength and sealing under the condition of bearing external high pressure

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