An exhaust device for closed hydraulic system

Abstract

The invention discloses an exhaust device for a closed hydraulic system, which belongs to the technical field of hydraulic systems; Mechanism and excitation mechanism; the excitation mechanism is installed on the side of the fuel tank, and the open end of the sealing cover is connected with the oil bag to form an airtight cavity; the closed end of the sealing cover is connected to the swing mechanism through a ball hinge; the side of the sealing cover is installed with a tee joint; the vacuum pump and the air compressor are respectively connected to the two ends of the three-way joint on the side of the sealing cover through pipelines, and shut-off valves are respectively arranged on the pipelines connected between the vacuum pump and the air compressor and the said three-way joint; the present invention adopts The air dissolved in the hydraulic oil is separated out by vacuuming, and the air is discharged out of the system by uniform extrusion of external pressure. With the use of the swing mechanism and the excitation mechanism, the air bubbles in the gaps are discharged from the system together, and then the closed hydraulic pressure is purified. gas present in the system.

Description

technical field [0001] The invention belongs to the technical field of hydraulic systems, and in particular relates to an exhaust device for a closed hydraulic system. Background technique [0002] At present, the buoyancy driving unit used for the deep-sea submersible to realize the up and down movement generally adopts a closed hydraulic system. Due to the system assembly and the hydraulic oil itself, it is easy to mix air into the hydraulic system; the existence of air in the hydraulic oil can easily make the closed hydraulic system Cavitation occurs when the hydraulic system works under high pressure and depth, which affects the life of hydraulic components and reduces the reliability of the system; the traditional hydraulic system exhaust method can only evacuate the gas that has not dissolved in the oil in the system, but cannot effectively discharge the gaps in the system Medium and small gas bubbles and a small amount of gas dissolved in hydraulic oil under normal pr...

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Problems solved by technology

[0002] At present, the buoyancy drive unit used for deep-sea submersibles to realize up and down movement generally adopts a closed hydraulic system. Due to the system assembly and the hydraulic oil itself, it is easy to mix air into the hydraulic system; the existence of air in the hydraulic oil can easily make the closed hydraulic system Cavitation occurs when the hydraulic system works under high pressure and deep depth, which affects the life of hydraulic components and reduces the reliability of the system; the traditional hydraulic system exhaust method can only evacuate the gas that has not dissolved in the oil in the system, but cannot effectively discharge the gaps in the system Gas with medium and small bubbles and a small amount of gas dissolved in hydraulic oil under normal pressure

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