A closed pressure regulating oil tank with high precision detection of oil quantity

Abstract

The invention discloses a closed-type pressure-regulating oil tank for high-precision detection of oil quantity, which includes a main body unit of the fuel tank and an air pressure adjustment unit; the main body unit of the fuel tank includes a front end cover of the fuel tank, a barrel wall of the fuel tank, a sealing piston body, a rear end cover of the fuel tank and a stroke Displacement sensor; the air pressure adjustment unit includes: a pressure sensor, an air pump, an air circuit check valve and an air circuit solenoid valve; the front end cover of the fuel tank, the barrel wall of the fuel tank and the rear end cover of the fuel tank form the closed inner cavity of the fuel tank, and a tension rod is used to The main unit of the fuel tank is tightened and fixed; the front cover of the fuel tank is provided with oil inlet and outlet holes; the rear end cover of the fuel tank is provided with inlet and outlet holes of the fuel tank; the oil inlet and outlet holes can be connected to the hydraulic system, and the inlet and outlet holes are connected to the air pressure adjustment unit ;The sealing piston body is set in the closed inner cavity and the closed inner cavity is divided into the oil side and the gas side; the pressure sensor is installed in the threaded hole of the rear end cover of the fuel tank; the air pump and the gas circuit solenoid valve are fixed on the rear end of the fuel tank by screws Cover outside. The invention has the advantages of compact structure, high integration degree and light weight.

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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