Device and method for cleaning foreign matters in inner cavity of multi-oil-way oil injection rod

Abstract

According to the cleaning device and method for the foreign matter in the inner cavity of the multi-oil-way oil injection rod, one end of a sleeve in the device is open, the inner diameter of the sleeve is larger than the outer diameter of the main body end of the oil injection rod, a positioning plate is sealed at the open end of the sleeve and perpendicular to the sleeve, and rectangular through grooves are formed in the positioning plate and distributed in the sleeve; the height of the rectangular through groove is larger than or equal to the outer diameter of the oil injection rod body. The sum of the thickness of the positioning plate and the inner length of the sleeve is larger than the length of the oil injection rod body. The oil injection rod body is sleeved with a sleeve, the joint of the positioning plate and the oil injection rod outlet portion and the body portion is sealed, a through hole is formed in the other end of the sleeve, a connecting nozzle of a hollow columnar structure is arranged at the through hole in a sealed mode, the eccentric distance exists between the connecting nozzle and the axis of the sleeve, and the included angle between the connecting nozzle and the plane where the other end of the sleeve is located is smaller than 90 degrees. According to the method, the mouthpiece is connected with a flushing equipment pipeline, then the flushing equipment is started, flushing fluid enters an inner cavity of an oil way through a spray hole of the oil spray rod and forms a spiral vortex shape, and foreign matter in the inner cavity is flushed away.

Description

technical field [0001] The invention belongs to the field of aero-engine fuel injection rod processing, and in particular relates to a device and method for cleaning foreign matter in the inner cavity of a multi-oil path injection rod. Background technique [0002] The aero-engine fuel injector generally integrates multiple fuel circuits, and each fuel circuit adopts a direct injection nozzle with a small aperture and a large number of nozzles. Because the aero-engine fuel injector rod requires welding and post-welding stress relief heat treatment, the nozzle hole processing of the aero-engine fuel injector rod is arranged after welding and heat treatment. [0003] Aero engine fuel injector such as Figure 1a , Figure 1b and Figure 1c As shown in the figure, the nozzles of the aero-engine fuel injection rod not only have a small diameter and a large number of nozzles, but also some nozzles have compound angles, and because the material of the aero-engine fuel injection r...

AI Technical Summary

Problems solved by technology

Although there is no iron filings in electric machining, tiny particles will still be produced during the machining process, which cannot completely avoid foreign matter remaining in the inner cavity

[0004] Since the oil inlet of each fuel injection rod of the aero-engine has a certain inclination angle with the oil passage, and the nozzle of the fuel injection rod of the aero-engine is small, each oil passage of the fuel injection rod is close to a closed cavity. Conventional forward flush cleaning method is difficult to clean

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