A Total Pressure Rake Structure of Intake Distortion

Abstract

The invention relates to an inlet distortion total pressure rake structure including a receiver, a total pressure rake and an inner ring. One end of the total pressure rake is fixed to the receiver and the other end of the total pressure rake is provided with a connecting portion. The inner ring has a convex mounting portion provided with a mounting groove in which the connecting portion is disposed. The connecting portion is in clearance fit with the mounting groove. A gap is arranged between the root end surface of the connecting portion and the end surface of the mounting portion. The inlet distortion total pressure rake structure has advantages of 1) having a high static strength reserve under the aerodynamic load of an engine inlet; 2) having a sufficient anti-vibration capability in an engine vibration environment; 3) preprocessing the dangerous section of the distortion total pressure rake and reducing the threat of the distortion total pressure rake components to engine safety; and 4) reducing the influence of the total pressure rake on engine inlet flow by changing the cross section of the total pressure rake and the inner ring.

Description

technical field [0001] The invention belongs to the technical field of aero-engine design, and in particular relates to an intake distortion total pressure rake structure. Background technique [0002] The air intake distortion rake is an indispensable import test sensing part of the aero-engine intake distortion test. How to improve its safety factor to ensure the safety of the engine test has always been one of the key research contents. The air intake distortion total pressure rake at the inlet of modern aeroengines mostly adopts a single cantilever structure or a structure in which the rake arm and the inner ring are fixed. Such as figure 1 and figure 2 As shown, it is a typical engine intake distortion total pressure rake, which is mainly composed of total pressure rake arm 3' and inner ring 2'. Bolts and nuts are used to fasten the connection between the inner ring 2' and the total pressure rake arm 3', such as figure 1 The threaded connection between the self-loc...

AI Technical Summary

Problems solved by technology

Bolts and nuts are used to fasten the connection between the inner ring 2' and the total pressure rake arm 3', such as figure 1 The threaded connection between the self-locking nut 5' and the end of the total pressure rake arm 3', with a spacer 4' between them, the entire intake distortion total pressure rake is connected into a rigid structure with limited vibration resistance

And the fastening part of the sensing part (that is, the self-locking nut 5') is completely exposed in the flow channel, which poses a certain potential threat to the safety of the engine

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