Pressure compensation device with pressure relief detection and automatic oil making-up and pressure maintaining functions for underwater tool

Abstract

A pressure compensation device with pressure relief detection and automatic oil making-up and pressure maintaining functions for an underwater tool comprises a cylinder body, a piston, a sealed leather bag, a piston rod, a proximity unit sleeve, a proximity switch, a proximity switch support, an extension spring and an oil storage cavity. The upper end of the cylinder body is fastened to the lowerend of the proximity switch support, the proximity switch is arranged on the proximity switch support, the lower end of the piston rod is in sealing connection with the piston, the upper end of the piston rod extends into the proximity switch support after penetrating through the cylinder body, one end of the extension spring is connected with the piston, and the other end of the extension springis connected with the tail end of the proximity switch support. The sealed leather bag is tightly connected to the cylinder body and the piston, and therefore the sealed leather bag, the piston, thecylinder body and the piston rod form the oil storage cavity. In this way, the pressure compensation device is simple in structure, easy and convenient to control and stable in work, can effectively balance the internal pressure and external pressure of a transmission device, can conduct automatic compensation timely after oil permeating or oil leakage of a to-be-compensated device is detected, and thus external liquid is prevented from permeating into the transmission device to damage the transmission device.

Description

technical field [0001] The invention relates to the technical field of pressure compensation for underwater engineering machinery, in particular to a pressure compensating device capable of automatically replenishing oil and maintaining pressure for hydraulic system transmission devices in pressure-increased environments (such as underwater or in mud) for detecting pressure relief of underwater appliances . Background technique [0002] For transmissions working in an environment with increased pressure (such as in water or mud), the internal and external pressure difference of the transmission will cause seal damage. In order to reduce the risk of seal damage, it is necessary to perform pressure compensation inside the transmission to ensure The internal pressure of the transmission is balanced with the external pressure or the internal pressure is slightly higher than the external pressure. [0003] The current pressure compensation devices include bladder type, metal foi...

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Problems solved by technology

[0003] The current pressure compensation devices include bladder type, metal foil mode and bellows type. Although a certain amount of pressure compensation can be performed, the effect has been proved to be unsatisfactory. Replenish

[0004] There is also an active control pressure compensation technology in the prior art, which actively sets the internal pressure of the transmission to make the internal pressure of the transmission higher than or equal to the external pressure, especially when the compensation pressure is higher than the external pressure, the pressure in the transmission The oil can only leak to the outside world, and no foreign substances will leak into the transmission device. Although this technology can better protect the transmission device, its structure is too complicated, and it is difficult for the pressure data acquisition components and the implementation of active control. High component requirements

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