Universal test platform for simulating actual installation coordinates of aero-engine external pipeline

Abstract

The present application belongs to the technical field of flow resistance characteristic and leakage characteristic testing of aero-engine external pipelines, and particularly relates to a universal test platform for simulating the actual installation coordinates of an aero-engine external pipeline. The universal test platform comprises: a moving bottom plate; a fixed platform located at the top of the moving bottom plate; a support rod for connecting the moving bottom plate and the fixed platform; a fixing plate for fixedly installing the inlet pipeline and the outlet pipeline of a test pieceon the fixed platform, and controllably adjusting the positions of the inlet pipeline and the outlet pipeline; and an air bleed device connected to the inlet pipeline of the test piece. The universaltest platform for simulating the actual installation coordinates of the aero-engine external pipeline has good operability. In addition, the moving parts on the bottom of the platform provide good maneuverability. Further, the entire connecting structure has firm stability so as to ensure the sealing of the connecting device, and the safety of the test.

Description

technical field [0001] The application belongs to the technical field of testing flow resistance characteristics and leakage characteristics of aero-engine pipelines, and in particular relates to a general test platform for simulating real installation coordinates of external pipelines of aero-engines. Background technique [0002] The external pipeline of an aeroengine is an important part of the overall structure of the engine. It is an important channel for medium transmission and energy transfer such as the engine fuel system, lubricating oil system, and air system. Its flow characteristics, distribution characteristics, and sealing characteristics are closely related to system reliability. , and even affect the reliability and safety of the entire engine. Due to the compact layout of the aero-engine, uncoordinated deformation, and anti-vibration damage, external pipelines are often designed with special-shaped routing (such as bending, inflection), and there are plug-in...

AI Technical Summary

Problems solved by technology

[0004] 1) Since there is no constraint point, it is impossible to ensure that the connection state of the external pipeline is consistent with the actual installation state of the engine. When the actual installation posture of the external pipeline is a plug-in structure, the axial, circumferential and radial directions between the plug-in parts cannot be carried out. The position and angle match, not only cannot carry out accurate clearance fit simulation, can not obtain the clearance leakage characteristics, but also cannot withstand the internal pressure of the pipeline to cause the test piece to crack;

[0005] 2) The problem of connection tightness. When the pressure and temperature of the pipeline flow characteristic test are high, the vibration of the pipeline with the air flow will aggravate the potential loosening and leakage caused by the thermal expansion of the fasteners, and the risk of re-testing is high;

[0006] 3) The safety of the test. Only the inlet of the pipeline test piece is connected to the test device. Once the connection is not firm, the connection piece or the test piece will fly out under the action of high-pressure air flow, which will cause extremely serious consequences;

[0007] 4) Operability and normative issues. Since the existing device does not have a fixed installation platform, the external pipelines of different structures will cause changes in the connection of the test device. On the one hand, it may cause confusion in the connection sequence, and on the other hand, it is not easy to follow Check the tightness and tightness of the pipeline

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