Oil-hydraulic buoyancy adjustment device and method

Abstract

The invention discloses a hydraulic-oil buoyancy adjusting device and method. The device comprises a casing, wherein the casing is filled with gas of certain pressure; an outer container accommodating hydraulic oil is arranged outside the casing, and an inner container accommodating hydraulic oil, a first pilot operated check valve, a first container accommodating hydraulic oil, a two-way hydraulic pump-motor, a second container accommodating hydraulic oil and a second pilot operated check valve are arranged in the casing; the inner container and the outer container are both elastic and flexible containers, and the volume of the elastic and flexible containers changes along with the change of volume of the hydraulic oil in the elastic and flexible containers; a motor connected with the two-way hydraulic pump-motor is further arranged in the casing. According to the hydraulic-oil buoyancy adjusting device and method, buoyancy is adjusted by changing the volume of the outer container, and accordingly automatic submergence, floating and depth control of equipment including underwater robots, buoys, bathyscaphs, gliders and the like are realized; the water depth pressure energy is fully used, the work efficiency of the hydraulic-oil buoyancy adjusting device is improved, working pressure required by the hydraulic pump and pressure borne by the casing are reduced, the weight and the volume of the casing are reduced, and conditions are created for further increasing submergence depth.

Description

technical field [0001] The invention belongs to the field of buoyancy adjustment devices, and in particular relates to an oil-hydraulic buoyancy adjustment device and method for realizing automatic submersion, ascent and depth-fixing control of underwater robots, buoys, deep submersibles, gliders and other equipment in the field. Background technique [0002] The hydraulic drive buoyancy adjustment systems disclosed in the prior art include oil hydraulic buoyancy adjustment type and water hydraulic buoyancy adjustment type. [0003] Chinese invention patent CN102079375 A, master's thesis "Development of Oil Bag Type Buoyancy Adjustment Device" (Huazhong University of Science and Technology, Fang Xu) discloses oil-hydraulic buoyancy adjustment system such as figure 1 As shown, it mainly includes inner and outer containers, one-way valves, electromagnetic reversing valves, two-way hydraulic pumps, motors, etc., wherein the outer container is a sealed cavity and placed in the e...

AI Technical Summary

Problems solved by technology

Although the water hydraulic technology is compatible with the marine environment, has the advantages of automatic compensation of sea depth pressure, low operating cost, and easy handling of the working medium, it requires multiple additional solenoid valves and one-way seawater pumps to complete the system's submersion and surfacing. , not only the system structure is complex, but also there are problems such as high pump working pressure, unused deep sea pressure energy, and large shell pressure

It should be noted that the solenoid valve used in this scheme needs a special control signal, and it needs to be powered on all the time during the floating and diving process, which wastes energy. Once the solenoid valve fails, the device will not work, which will affect the stability of the device.

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