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Installation method of gear root strain gauge with narrow clearance

An installation method and strain gage technology are applied in the testing of machine gears/transmission mechanisms, measuring devices, and testing of mechanical components. It can solve problems such as installation difficulties and lead wire crushing, so as to reduce the possibility of being crushed and avoid The effect of being crushed and improving the survival rate

Active Publication Date: 2019-02-19
AECC HUNAN AVIATION POWERPLANT RES INST
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Problems solved by technology

[0004] The invention provides a method for installing a gear root strain gauge with a narrow top clearance, which solves the problem that the gear tooth root strain gauge with a narrow top clearance is difficult to install, and the installed strain gauge and lead wire are easily crushed during the gear meshing process. question

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  • Installation method of gear root strain gauge with narrow clearance

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Embodiment Construction

[0044] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0045] The present invention aims to solve the difficulty in installing the strain gage and the ease of installing the strain gage and lead wires during the measurement of the tooth root bending stress and stress distribution of gears with a top clearance below 0.7mm without damaging the gear or displacing the measurement point. The problem of being crushed during the meshing process provides a method for installing small-sized strain gauges at the tooth roots of gears with narrow top clearances.

[0046] to combine figure 1 , a preferred embodiment of the present invention provides a method for installing a gear tooth root strain gauge with a narrow top clearance, comprising the following ste...

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Abstract

The invention discloses an installation method of a gear root strain gauge with a narrow clearance. The method comprises the following steps: determining a maximum stress position of a root of a gearto be installed as an installation position; preparing a strain gauge, wherein the space dimension of the strain gauge is matched with the clearance of the gear to be installed; polishing and cleaningthe installation position of the root of the gear to be installed; attaching and pressing the strain gauge at the installation position; installing a terminal for connecting a test lead and a lead for the strain gauge to a non-working surface, of a gear to be installed, adjacent to a strain gauge installing gear tooth to be installed; respectively arranging leads on both sides of the strain gaugealong the bottom of a slot; folding back the lead away from one side of the terminal, or the lead away from the terminal side passing out from a vibration damping hole to contact with the lead of theother side at the terminal and fixedly connecting with the terminal, so that the lead and the lead, the lead and the strain gauge doing not overlap each other. According to the installation method ofthe gear root strain gauge with the narrow clearance, the problem that the strain gauge is difficult to install in the gear root strain gauge with the narrow clearance is solved.

Description

technical field [0001] The invention relates to the field of installation of strain gauges, in particular to a method for installing strain gauges of tooth roots of gears with narrow top clearances. Background technique [0002] The bending stress of the gear dedendum of the helicopter transmission system directly affects its service life and safety. The measurement of the gear dedendum stress can be carried out using the resistance strain gauge method. The accuracy of the test results mainly depends on the installation quality of the strain gauge. The gear tooth root of aero-engine and transmission system has the characteristics of narrow top clearance, small remaining space during meshing, and harsh working conditions (heavy oil pollution, high speed, complicated installation process), etc. Install the strain gauge at the place or the strain gauge and the lead wire will not be crushed due to the meshing of the gear teeth after the strain gauge is installed. The difficulti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/30G01M13/02
CPCG01B5/30G01M13/021
Inventor 张娟朱亿德文华付亚冰
Owner AECC HUNAN AVIATION POWERPLANT RES INST
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