Crawler-type armored chassis side speed reducer gear contact fatigue analysis method

Abstract

The invention discloses a crawler-type armored chassis side speed reducer gear contact fatigue analysis method. The method comprises the following steps of step1, through processing load data acquired from a typical-pavement real vehicle test, using a rain-flow counting method to compile a load spectrum of a transmission system; step2, through a stress and intensity interference model, establishing a calculating model of chassis side speed reducer reliability; and step3, using a calculating relation of a contact intensity life coefficient and a stress cycle number to acquire driving and driven gear contact fatigue reliability lives which are expressed by a travelled distance. By using the crawler-type armored chassis side speed reducer gear contact fatigue analysis method, a failure mechanism and a service life prediction method of a side speed reducer are researched; and through assessing the service life under a service environment, a strategy and a suggestion are provided for usage, maintenance and remanufacturing.

Description

technical field [0001] The invention relates to a reducer analysis method, in particular to a gear contact fatigue analysis method of a crawler-type armored chassis side reducer, belonging to the technical field of reduction products. Background technique [0002] The side reducer is an important component of the transmission system of a crawler-type armored chassis. It is located between the planetary steering gear and the driving wheel. Speed, the driving and passive gears are repeatedly subjected to alternating loads in the process of shifting and steering, resulting in fatigue cracks on the surface of the gear teeth, which then expand into small metal pieces on the surface and fall off, forming pitting corrosion. The hardness is high, the local protrusions are not easy to be ground, and the small hemp pits of early pitting may expand, forming expansive pitting, and extending along the entire length of the pitch line, with a large distribution range, and expansive pitting...

AI Technical Summary

Problems solved by technology

[0002] The side reducer is an important component of the transmission system of a crawler-type armored chassis. It is located between the planetary steering gear and the driving wheel. Speed, the driving and passive gears are repeatedly subjected to alternating loads in the process of shifting and steering, resulting in fatigue cracks on the surface of the gear teeth, which then expand into small metal pieces on the surface and fall off, forming pitting corrosion. The hardness is high, the local protrusions are not easy to be ground, and the small hemp pits of early pitting may expand, forming expansive pitting, and extending along the entire length of the pitch line, with a large distribution range, and expansive pitting will destroy the tooth shape. The increase of the dynamic load will lead to the reduction of the transmission stability of the side reducer, the increase of the noise, and even the rapid failure