Linear pressure valve of underwater installation hydraulic system for environmental pressure compensation

Abstract

The invention discloses a kind of pressure compensation pilot control pressure valve in underwater device hydraulic system environment, which is made up of a saline water environment pressure sensitive part, automatic discharging part, automatic make-up part and pressure valve. The device senses the saline water environment pressure through the rolling film piece of the sensitive part, because of the prepress effect of the spring, the compensation pressure is a little higher than the saline water environment pressure. The automatic discharging part is sued for discharging the initial air. The automatic make-up part is used to fill oil to the cavity of the sensitive part. The oil pressure of application pressure sensitive part controls the pilot control pressure valve which has a direct feedback testing function makes the pressure at the inlet of the pressure valve part balances with the saline water environment pressure. The invention overcomes that the compensation precision is low with current pressure compensator; it can't make up oil and discharge air automatically.

Description

Technical field [0001] The invention relates to a fluid pressure actuator, in particular to an environmental pressure compensation direct-acting pressure valve of a hydraulic system of underwater equipment. Background technique [0002] Marine underwater equipment includes three categories: underwater robots, underwater construction equipment and military submarines. For the hydraulic control system of these underwater equipment, it is necessary to solve some related key problems to ensure the control performance of the hydraulic system when working in the environment of seawater with large pressure changes, strong corrosion, and large temperature changes. How to solve the problem of pressure compensation or pressure balance of the hydraulic system with the change of seawater pressure naturally becomes one of the key problems to be solved by the hydraulic system of underwater equipment. [0003] The pressure of the hydraulic system of underwater equipment did not take press...

AI Technical Summary

Problems solved by technology

For underwater equipment that needs to dive underwater for several months, it is impossible to replenish oil during work.

Therefore, this compensator cannot meet the requirements of automatic oil replenishment;

[0011] (3) The existing pressure compensator does not have an automatic exhaust device, and it must be pre-filled with oil manually before working, and the air in it must be emptied

In this way, the equipment must be manually checked and exhausted before entering the water every time, causing unnecessary trouble

[0012] (4) This pressure compensator can only be applied to the whole hydraulic system including the hydraulic source in the seawater environment, and the purpose of pressure compensation can be achieved by installing it on the oil tank

If a pressure sensor is used to measure the pressure, and the pressure signal of the surrounding seawater environment is converted into an electrical signal to control the proportional electromagnet, although the purpose of pressure compensation can also be achieved, but the particularity of the seawater environment, the insulation and reliability of electrical equipment will be difficult. Difficult to guarantee; if the proportional electromagnet part is removed, the cavity where the proportional electromagnet iron core of the direct control proportional relief valve is located and the spring cavity communicate with the oil drain hole. When the pressure is connected, the opening and closing of the valve port cannot be controlled, and the system pressure cannot be compensated

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