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

Abstract

The invention discloses an environment pressure compensation direct-acting pressure valve of a hydraulic system of underwater equipment. It consists of seawater environment pressure sensitive parts, automatic exhaust parts, automatic oil replenishment parts and pressure valve parts. It senses the seawater environment pressure through the rolling diaphragm of the seawater environment pressure sensitive part, and due to the preloading effect of the constant force spring, the compensation pressure is slightly higher than the seawater environment pressure. Automatic exhaust components are used for initial air discharge. The automatic oil replenishment part is used for oil shortage replenishment in the oil cavity of pressure sensitive parts. The oil pressure of the pressure sensitive part is used to control a direct acting pressure valve, so that the pressure at the inlet of the pressure valve part is balanced with the pressure of the seawater environment. The present invention overcomes the disadvantages of the existing pressure compensator, such as low pressure compensation accuracy, incapability of automatic oil replenishment and exhaust, and failure to apply to underwater hydraulic systems in which the oil source is in normal pressure air, and solves the problem that traditional hydraulic valves cannot be used directly. The problem of pressure compensation in seawater environment.

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; 1

[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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