Pressure refueling pipeline outlet flow control device

Abstract

The invention discloses a pressure refueling pipeline outlet flow control device, which is characterized in that a perforated pipe (2) is connected to the tail end of a refueling pipeline, and a plurality of through holes are formed in the pipe wall of the perforated pipe (2); the front part of an outer cover (1) is welded to the perforated pipe (2) and reinforced by a supporting device (3), and an exhaust hole (4) is formed in the top of the outer cover (1); high-speed fuel enters the pressure refueling pipeline outlet flow control device, is then sprayed out of the through holes in the perforated pipe to the outer cover (1) and flows into the bottom of a fuel tank along the flow guide flanging of the outer cover (1). According to the pressure refueling pipeline outlet flow control device, high-speed fuel oil is decelerated after entering the fuel tank during pressure refueling, meanwhile, it is guaranteed that the decelerated fuel oil flows uniformly and slowly, excessive disturbanceand possible electrostatic discharge to deposited water and impurities at the bottom of the fuel tank are avoided, and refueling safety is guaranteed.

Description

technical field [0001] The invention belongs to the field of aircraft pressure refueling system equipment, and relates to a pressure refueling pipeline outlet flow control device. Background technique [0002] When the aircraft is refueled under pressure, the flow rate is usually large to meet the requirements of short refueling time. When the hydrocarbon liquid flows through metal surfaces, such as refueling pipes, filters, nozzles, fuel tanks and airframe pipelines, electrostatic charges will be generated. Therefore, the airworthiness advisory circular proposes that the flow velocity at the outlet of the fuel tank should not be greater than 1m / s during pressure refueling, and not greater than 7m / s after being submerged. At the same time, it is also proposed to ensure that the fuel entering the fuel tank does not excessively disturb the water and impurities deposited at the bottom of the fuel tank, and the outlet should be located at a lower position in the fuel tank. The r...

AI Technical Summary

Problems solved by technology

[0003] Generally, when the aircraft is refueling under pressure, the outlet of the pipeline entering the fuel tank mostly adopts the structure of flute tube or bell mouth. The flow rate is not uniform, and it is easy to generate turbulent flow and separation flow, etc., which will cause excessive disturbance to the moisture and impurities deposited at the bottom of the fuel tank, and may cause electrostatic discharge, ignite the combustible fuel gas mixture, and cause danger

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