A test device and method for adjusting critical speed of aero-engine speed limiter

Abstract

The invention belongs to the field of test tooling for aero-engine control accessories. The invention relates to an aero-engine speed limiter critical speed adjustment test device and method; the device comprises: a wrench, a mandrel, a base, an adjusting nut, and a set screw; the wrench is cylindrical, and the length is consistent with the outer diameter of the head of the mandrel; The rod is a cylindrical sleeve structure, and the head has a step; the end face of the head is provided with a groove, and the width of the groove matches the raised width of the wrench; the base and the adjusting nut are of sleeve structure, and the wrench is installed inside the ejector rod , the ejector rod is installed inside the base, and the adjusting nut is installed outside the base; the ejector rod is clearance fit with the wrench and the base respectively; there is an internal thread matching with the base; the set screw is installed on the adjusting nut, and the adjustment The nut locks with the base. The method of the device realizes the simultaneous online adjustment of the over-rotation speed and the speed-measurement speed adjustment test, which improves the work efficiency and ensures the qualification rate of the first-time installation of the product end cover assembly.

Description

technical field [0001] The invention belongs to the field of aero-engine control accessory test tooling structure design, relates to an independent online adjustment structure design for simultaneously realizing the over-rotation speed limiter over-rotation speed and the tachometer speed, in particular to an aero-engine speed limiter critical speed adjustment test device and method. Background technique [0002] The core function of the aero-engine over-speed limiter is mainly realized by the mechanical centrifugal speed sensitive element, and the critical speed adjustment is the key to ensure the functional performance of the mechanical centrifugal speed sensitive element. The over-rotation limiter is a component of the turboprop propeller control system and is used to ensure that the propeller works stably under the limit speed. like figure 1 As shown, it includes: an adjuster 13, an adjusting screw 10, a piston 12, an end cover assembly 9, and a housing assembly 11; the ...

AI Technical Summary

Problems solved by technology

The existing conventional test adjustment tooling cannot achieve the purpose of simultaneously, independently and online adjusting the overrun speed and the speed measurement speed, resulting in cumbersome debugging operations

Moreover, the aperture of the mounting seat of the speed limiter is small, only φ9.5mm, and the space is limited

The current speed adjustment test tool cannot realize the adjustment of two speed test states at the same time after one installation. It can only be performed after the over-rotation speed adjustment test, then the tooling is removed, and then the speed measurement and speed adjustment test tool is installed, and this operation is repeated continuously. , to achieve the ultimate goal of the speed adjustment test

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