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An exhaust device for closed hydraulic system

A technology of hydraulic system and exhaust device, applied in the direction of fluid pressure actuating device, fluid pressure actuating system components, mechanical equipment, etc., can solve problems such as affecting the life of hydraulic components, cavitation, reducing system reliability, etc. Longevity, effect of reducing cavitation intensity

Inactive Publication Date: 2019-03-08
CSIC NO 710 RES & DEV INST
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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

Method used

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  • An exhaust device for closed hydraulic system

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Embodiment Construction

[0015] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0016] The invention provides an exhaust device for a closed hydraulic system, see the attached figure 1 , including: vacuum pump 1, air compressor 2, second stop valve 3, third stop valve 17, tee joint 4, sealing cover 5, swing mechanism 12, excitation mechanism 13, vacuum pressure gauge 14 and pressure gauge 15;

[0017] Its peripheral equipment is a closed hydraulic system, which includes: oil bag 6, pressure-resistant cover 7, valve group 8, hydraulic pump 9, oil tank 10, piston 11 and first stop valve 16; the bottom surface of the oil tank 10 is respectively provided with oil outlet and oil inlet; the oil bag 6 is docked with the pressure-resistant cover 7 to form a closed cavity, and hydraulic oil is housed in the closed cavity; the hydraulic pump 9 communicates with the closed cavity through the valve group 8; the oil tank 10 is equipped with Hydra...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B21/044
CPCF15B21/044
Inventor 冀功祥刘方蒋平方巍吴文辉
Owner CSIC NO 710 RES & DEV INST
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