CN100482533C - Underwater glider floatage control device - Google Patents

Abstract

The invention relates to a buoyancy control device of an underwater glider. Most of the buoyancy control of existing underwater gliders uses a stepping motor to drive the piston in the hydraulic cylinder to reciprocate, so that the oil in the cylinder is sucked into or discharged from the oil bag. It is difficult to use this technology to develop into the deep sea. The invention comprises a small high-pressure pump, a small electromagnetic valve, a small one-way valve, an oil chamber and an oil bag arranged outside the pressure housing. The oil chamber includes a chamber, the piston is arranged in the chamber and is closely matched and movably connected with the chamber, and two linear potentiometers are arranged on the upper part of the piston. Oil chamber, small high-pressure pump, small one-way valve, small solenoid valve and oil bag form a circuit. The present invention can accurately control the variation of buoyancy according to needs, and is not affected by the inclination attitude of the fuselage, so that the underwater glider can sail accurately according to the predetermined track, and realize the development of the underwater glider to the deep sea.

Description

Underwater glider buoyancy control device

technical field

The invention relates to a control device, in particular to a buoyancy control device of an underwater glider that can be widely used in water body water quality monitoring, underwater resource survey and environmental monitoring.

Background technique

At present, most of the automatic detectors used for marine water quality monitoring, underwater resource surveying, and environmental monitoring research use propellers and other propulsion methods, so after working for a short time, they need to supplement power energy. Frequent charging procedures greatly limit the distance and depth of the probe in the ocean. For underwater gliders using buoyancy as a power source, most of the buoyancy control uses stepping motors to drive the piston in the hydraulic cylinder to reciprocate, so that the oil in the cylinder is sucked into or discharged from the oil bag. Limited by the power of the stepping motor and the performance conditions of the hydraulic cylinder, the working depth of the underwater glider is only tens of meters, and it is difficult to develop into the deep sea.

Contents of the invention

The purpose of the present invention is to address the deficiencies of the prior art, and propose a buoyancy control device suitable for underwater glider that can precisely control flow changes.

The buoyancy control device of the underwater glider of the present invention comprises a small high-pressure pump, a small solenoid valve, a small one-way valve, an oil cavity and an oil bag arranged outside the pressure casing. The connection between the oil bag and the pressure housing is sealed by a sealing ring. The oil chamber includes a chamber, the piston is arranged in the chamber and is closely matched with the chamber and is movably connected. Two linear potentiometers are arranged on the upper part of the piston, and the pull wires of the linear potentiometers are connected with the piston. The oil chamber and the oil bag are communicated through an oil inlet circuit and an oil return circuit respectively. The oil inlet circuit includes a pipeline, a small high-pressure pump and a small one-way valve, and the oil return circuit includes a pipeline and a small solenoid valve. The oil chamber, small high-pressure pump, small one-way valve, small electromagnetic valve and oil bag form a circuit.

The current buoyancy control device of the underwater glider of the present invention can meet the deep sea ups and downs of the underwater glider, and the replacement and maintenance of hydraulic components are relatively convenient. Moreover, the variation of the buoyancy can be accurately controlled according to the needs, without being affected by the tilt attitude of the fuselage, so that the underwater glider can sail accurately according to the predetermined trajectory, and realize the development of the underwater glider to the deep sea.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a hydraulic principle diagram of the present invention.

Detailed ways

As shown in FIGS. 1 and 2 , the buoyancy control device of the underwater glider includes a small high-pressure pump 4 , a small solenoid valve 6 , a small one-way valve 5 , an oil chamber 9 and an oil bag 1 . Small high-pressure pump 4, small solenoid valve 6, small one-way valve 5 and oil cavity 9 are arranged inside pressure-bearing shell 3; oil bag 9 is arranged outside pressure-bearing casing 3, and the surface is in direct contact with seawater. The connection between the oil bag 1 and the pressure housing 3 is sealed with an O-ring 2 . The oil chamber 9 is composed of a chamber body 7 , a piston 8 and two linear potentiometers 10 . The oil chamber 9 and the oil bag form a circuit through the small high-pressure pump 4 and the small one-way valve 5, and communicate through the small solenoid valve 6 at the same time. The function of the small one-way valve 5 is to prevent the oil in the circuit from flowing back to the oil chamber 9 through the small high-pressure pump 4 . Oil chamber 9, small high-pressure pump 4, small one-way valve 5, small electromagnetic valve 6 and oil bag 1 form a circuit.

When the underwater glider was ready to float, the small high-pressure pump 4 started to work, and the oil flowed into the oil bag 1 from the oil chamber 9 through the small one-way valve 5 . As the oil volume in the oil chamber 9 decreases continuously, the piston 8 gradually moves to the bottom, the pull wires of the two linear potentiometers 10 become longer and longer, and the output voltage signal increases continuously. When the voltage signal measured by the main control computer reaches a specified value, the small high-pressure pump 4 stops working. At this time, the buoyancy force is greater than the gravity force, and the underwater glider starts to float at a specified speed.

When the underwater glider was ready to dive, the small solenoid valve 6 was opened, and under the action of the internal and external pressure difference, the oil flowed back to the oil chamber 9 from the oil bag. As the oil in the oil chamber 9 continues to increase, the piston 8 gradually moves away from the bottom, the pull wires of the two linear potentiometers 10 are continuously shortened, and the output voltage signal value is continuously reduced. When the main control computer detects that the voltage signal reaches a specified value, the small solenoid valve 6 is closed. At this time, gravity is greater than buoyancy, and the underwater glider begins to dive at a specified speed.

During the working process, the underwater glider can adjust the buoyancy by turning on the small high-pressure pump 4 or the small solenoid valve 6 according to the work requirements; the buoyancy adjustment value can be fed back in real time through the voltage signal output by the linear potentiometer 10 .

Claims (1)

1. The buoyancy control device of the underwater glider includes a small high-pressure pump (4), a small one-way valve (5), a small electromagnetic valve (6), an oil chamber (9) and a pressure-bearing The oil bag (1) outside the casing (3), the oil bag (1) and the pressure-bearing casing (3) are sealed by the sealing ring (2), and the feature is that the oil chamber (9) includes a cavity (7), a piston (8) It is arranged in the cavity (7) and is closely matched with the cavity (7). Two linear potentiometers (10) are arranged on the upper part of the piston (8), and the pull wire of the linear potentiometer (10) is connected with the piston ( 8) connection; the oil chamber (9) and the oil bag (1) are respectively communicated through the oil inlet and the oil return. The oil inlet includes pipelines, a small high-pressure pump (4) and a small check valve (5). The circuit includes a pipeline and a small solenoid valve (6); an oil chamber (9), a small high-pressure pump (4), a small one-way valve (5), a small solenoid valve (6) and an oil bag (1) form a circuit.

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