Pilot control overflowing system for airplane pressure fuel filling

Abstract

The invention discloses a pilot control overflowing system for airplane pressure fuel filling. The pilot control overflowing system is characterized in that a manifold of an airplane pressure fuel filling joint passes through a tee joint and then is divided into two paths for transferring pressure, wherein one path is connected with an excess oil discharge control joint on an overflowing valve through a pressure control pipe and the other path is connected with a pressure control joint on the overflowing valve through a pressure control pipe; and a ventilation balanced joint on the overflowing valve is communicated with the atmosphere through a ventilation balanced pipe. Compared with the prior art, the invention has the advantages of automatic and simple control, favorable safety and reliability, light weight, no influence from the flying posture of the airplane and the like and is suitable for a pressure fuel filling system of a small-sized airplane.

Description

technical field [0001] The invention relates to an aircraft pressure refueling pilot control overflow system, which belongs to the structural technical field of aircraft fuel refueling control products. Background technique [0002] In order to ensure that the air or excess fuel in the fuel tank can be discharged out of the aircraft smoothly during the pressure refueling process of the aircraft, increase the refueling speed and prevent the fuel tank from overpressure, an overflow valve should be installed on each fuel tank. [0003] The overflow valve commonly used on the small aircraft is a kind of mechanical one-way valve type overflow valve now, only when the pressure that the fuel tank produces is greater than the opening force of the overflow valve valve during pressure refueling, the valve can be opened. The valve control pressure of this kind of valve is transmitted by the fuel tank. If the valve is stuck, the fuel tank is required to withstand a lot of pressure to op...

AI Technical Summary

Problems solved by technology

The valve control pressure of this kind of valve is transmitted by the fuel tank. If the valve is stuck, the fuel tank needs to withstand a lot of pressure to open the valve. If the opening force exceeds the seal test pressure of the fuel tank, it will pose a threat to the safety of the aircraft fuel tank and the aircraft itself.

In addition, because the valve control chamber of this overflow valve is directly connected to the fuel tank, it is easily affected by the flight attitude of the aircraft. When the aircraft rolls or when there is lateral overload, the overflow valve will be opened and oil will leak. This problem is the problem of this type of overflow valve. The main disadvantage is that the oil leakage phenomenon cannot be overcome for small aircraft fuel tanks with low pressure requirements for sealing inspection

[0004] There is also a commonly used overflow valve is an electronically controlled overflow valve, which can meet the design requirements of opening when refueling and closing after refueling. However, in the case of large refueling flow, the diameter of the valve is required to be large, resulting in large dimensions. , the weight is also relatively large, it is not suitable for some small aircraft

In addition, the installation space and installation interface requirements of the electronically controlled overflow valve are also relatively high, and generally small aircraft wing fuel tanks cannot meet the installation requirements

[0005] In short, although the control of the electric control overflow valve is simple, the outline size, weight, and installation are not suitable; although the one-way valve overflow valve is simple in structure, weight, and installation meet the requirements, it is safe and reliable in use. Can not guarantee

Images