Passive self-cleaning type fouling-preventing flow limiting device

Abstract

The invention belongs to the technical field of fouling preventing of small hole structures of mechanical fluid systems and discloses a passive self-cleaning type fouling-preventing flow limiting device. The fouling-preventing flow limiting device is used for airplanes. A pressing screw is used for pressing an isolation frame on a sealing gasket, and isolation between a runner high-pressure cavityand a runner low-pressure cavity is achieved. A fouling removing steel wire can be tightly connected with a clamping block, then the fouling removing steel wire penetrates a throttling hole of the isolation frame, and the difference of the inherent frequency of the fouling removing steel wire and the inherent frequency of the isolation frame is large. By means of the design, a vibration source ofan engine on an airplane can be used for achieving the relation motion of the fouling removing steel wire in a flow limiting hole of the isolation frame, the fouling removing steel wire can conduct stirring with high frequency in the flow limiting hole, and the purpose of achieving fouling removing in real time is achieved; and meanwhile, an inlet and outlet opening of the device can be arrangedaccording to design requirements of a valve and can rotate around the axis of the device and move properly in the length direction so as to be in butt joint with a runner of the valve, and during thebutt joint, sealing of the valve and completeness of the runner are ensured through a vulcanization sealing ring on a shell.

Description

technical field [0001] The invention belongs to the antifouling technical field of the small hole structure of a mechanical fluid system, and in particular relates to a passive self-cleaning antifouling flow limiting device. Background technique [0002] There are many precision valves in the aircraft system. When designing, due to functional requirements, there will be small flow passages inside the valves. The pressure provided by the medium in these flow passages is generally used to ensure that the actuator parts of the valves reach the pressure. Accurately perform the corresponding action when setting the pressure point. [0003] Therefore, there is a high requirement for the stability of the flow channel pressure. Due to the strict weight requirements of aviation products, it is often not allowed to use complex decompression or pressure stabilization structures to ensure the stability of the pressure in the above flow channel. Often a very small limiting The orifice i...

AI Technical Summary

Problems solved by technology

The reliability of these measures is not very high, especially when the gas medium flows through the above-mentioned narrow channel, the electrostatic adsorption that occurs is unavoidable, which has a great relationship with the cleanliness of the medium used by the aircraft. Increased cost and reduced equipment availability

Images