Closed pressure regulating oil tank capable of realizing high-precision detection of oil quantity

Abstract

The invention discloses a closed pressure regulating oil tank capable of realizing high-precision detection of oil quantity. The closed pressure regulating oil tank comprises an oil tank main body unit and an air pressure regulating unit, wherein the oil tank main body unit comprises an oil tank front end cover, an oil tank cylinder wall, a sealing piston body, an oil tank rear end cover and a travel displacement sensor; the air pressure regulating unit comprises a pressure sensor, an air pump, an air channel one-way valve and an air channel electromagnetic valve; the oil tank front end cover,the oil tank cylinder wall and the oil tank rear end cover form a closed inner cavity of the oil tank, and tensioning rods are adopted to tension and fix the oil tank main body unit; an oil inlet anddrain hole is formed in the oil tank front end cover; an oil tank air inlet and discharge hole is formed in the oil tank rear end cover; the oil inlet and drain hole can be connected to a hydraulic system, and the air inlet and discharge hole is connected to the air pressure regulating unit; the sealing piston body is arranged in the closed inner cavity and divides the closed inner cavity into anoil liquid side and a gas side; the pressure sensor is installed in a threaded hole of the oil tank rear end cover; and the air pump and the air channel electromagnetic valve are fixed on the outer side of the oil tank rear end cover through screws. The closed pressure regulating oil tank is compact in structure, high in integration level and light.

Description

technical field [0001] The invention belongs to the field of integrated hydraulic systems of unmanned aircraft, and in particular relates to a closed pressure-regulating oil tank for high-precision detection of oil quantity. Background technique [0002] Unmanned aerial vehicles usually refer to unmanned mobile platforms that navigate in the air and underwater. Compared with manned aircraft, unmanned aerial vehicles have stronger maneuverability, and can perform difficult maneuvers such as rolls, lateral turns, and pitch adjustments. In order to ensure that the integrated hydraulic system of the unmanned aerial vehicle can obtain continuous oil supply when performing difficult maneuvers, the closed oil tank, that is, the isolation scheme of the oil inside the oil tank and the external environment, becomes the integrated hydraulic system of the unmanned aerial vehicle one of the available options. [0003] At present, the isolation methods for the oil in the closed oil tank...

AI Technical Summary

Problems solved by technology

However, the current scheme has major defects in structural design, detection principle, and manufacturing process. For example, the friction resistance between the piston of the fuel tank and the inner wall of the cylinder is not considered, so that the closed fuel tank of this scheme cannot actively provide oil outlet pressure to the hydraulic system. When the oil returns to the oil tank, it needs to do work to push the piston to move; the wire rope length measurement method used by the pull-wire displacement sensor is not strictly linear, and there are still obvious errors in the oil volume measurement; Extremely demanding requirements on load quality

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