摘要详情

ID / 提交时间

201 / 2024-09-01 21:33:29

标题

The Influence of Contact Stress Distribution and Specific Film Thickness on the Wear of Spur Gears During Pitting Tests

关键字

contact fatigue, gears, pitting, shaving, contact stress, specific film thickness

主题及专题

lNovel Sensing Principles and Multi-modal Sensing

状态

全文被拒

作者

LiWeiding / Anhui Jianzhu Univeisity

摘要

One of the main gear damage mechanisms is the formation of pitting and spalling on the

tooth flank. Several factors have significant influence on the damage formation, such as:

contact stress level; tooth profile type; relative contact speed; surface finish and

lubrication conditions. This work comprehends the global observation of all such

parameters and was carried out to explain the phenomena related to this wear mechanism.

The wear test equipment uses the power recirculation principle and is commonly known as

FZG test rig. The gears were made from AISI 8620 steel and had two types of surface

finishing (by shaving or by milling). The wear experiments were performed with two

torque stages: 135 N.m (running-in) and 302 N.m (steady-state), and two test

temperatures: 60°C (running-in) and 90°C (steady-state). The wear level was determined

by using image analysis. In order to calculate the specific film thickness and friction

coefficient, the roughness of tooth flank was measured at each test stop. After the

experiments were completed, it was possible to confirm that, for both manufacturing

processes, the boundary lubrication regime was adopted at the tooth flank and the specific

film thickness presents a different behavior when compared to addendum, pitch diameter

and deddendum regions. The wear on the gear flanks depended on the lubricant film

thickness and it was higher for the milled gears.