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A method for measuring the nozzle length of an aero-engine

A length measurement and nozzle technology, which is applied in the field of improvement of the length measurement method of aero-engine nozzles, can solve the problems of easy missing detection, detection errors, and low detection efficiency, so as to eliminate missed detection of out-of-tolerance products and reduce detection The effect of improving error and detection efficiency

Active Publication Date: 2016-02-24
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: first, it is prone to missed detection
Due to the inconsistency of the part size, tool wear, machine tool instability and other factors during the processing process, the length of the nozzle will be out of tolerance, and the random inspection is carried out randomly, and the out-of-tolerance parts are not easy to be found
Second, when the section projection method is used for detection, it is difficult to ensure that the section passes through the nozzle axis, and there are detection errors
Third, the section projection method takes a long time to detect and the detection efficiency is low

Method used

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  • A method for measuring the nozzle length of an aero-engine
  • A method for measuring the nozzle length of an aero-engine
  • A method for measuring the nozzle length of an aero-engine

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Embodiment 1, measuring the nozzle length of a certain type of aircraft engine nozzle.

[0015] The hole diameter of the cylindrical section hole 1 of the nozzle is D=4.8mm, the cone angle of the circular platform section hole 2 is α=60, the hole diameter of the small-diameter cylindrical section hole 3 is d=0.8mm, and the specified length of the small-diameter cylindrical section hole 3 is C= 1.5mm; the steps to measure the nozzle length are as follows:

[0016] 1. Manufacture the measuring rod: the outer diameter D1 of the cylindrical shaft 4 of the measuring rod is 4.775mm, and the fit gap with the cylindrical section hole 1 of the inner hole of the nozzle is 0.025mm, and the length of the cylindrical shaft 4 is 5mm longer than the length of the cylindrical section hole 1 of the inner hole of the nozzle. , the cone angle of the cone 5 is α=60, the distance from the left end surface of the measuring rod to the positioning section on the cone 5 is a constant L=40mm, th...

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Abstract

The invention belongs to the measuring technology of aircraft engines, and relates to an improved method for measuring nozzle vent length of an aircraft engine. The method is characterized by comprising the following steps: manufacturing a probe; and measuring the vent length. The method for quick measuring the nozzle vent length of the aircraft engine eliminates the problem of missing inspection of out-of-tolerance products, reduces detection error and improves detection efficiency.

Description

technical field [0001] The invention belongs to the measurement technology of aero-engines, and relates to the improvement of a method for measuring the length of nozzles of aero-engines. Background technique [0002] The nozzle of an aeroengine fuel nozzle is a key part of the nozzle, see figure 1 , the inner hole of the nozzle is composed of three sections, the left section is a cylindrical section hole 1 with a diameter of D, the middle section is a circular platform section hole 2, the diameter of the large end of the circular platform section hole 2 is D, and the small end diameter of the circular platform section hole 2 is d , the cone angle of the circular frustum section hole 2 is α, the right section of the inner hole of the nozzle is a small-diameter cylindrical section hole 3, and the length of the small-diameter cylindrical section hole 3 is the nozzle length C to be measured. The inner diameter d of an aero-engine fuel nozzle is generally within 2 mm, and the l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B5/02
Inventor 杨能阁周晓卫闫文鲍延风路江英韩新艳刘点段瑞斐
Owner AECC AVIATION POWER CO LTD
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