A Meshing Resonance Based Demodulation Algorithm and Its Application for Planet Gear Tooth Root Crack Detection

2020 ◽  
pp. 1415-1435
Author(s):  
Tianyang Wang ◽  
Fulei Chu
Keyword(s):  
Crack Detection ◽  
Gear Tooth ◽  
Tooth Root ◽  
Planet Gear ◽  
Root Crack

Spur gear tooth root crack detection using time synchronous averaging under fluctuating speed

Measurement ◽  
2014 ◽  
Vol 52 ◽  
pp. 1-11 ◽  
Author(s):  
Nizar Ahamed ◽  
Yogesh Pandya ◽  
Anand Parey
Keyword(s):  
Crack Detection ◽  
Gear Tooth ◽  
Spur Gear ◽  
Tooth Root ◽  
Root Crack

ESTIMATING SIZE OF GEAR TOOTH ROOT CRACK USING EMBEDDED MODELLING

2002 ◽  
Vol 16 (5) ◽  
pp. 841-852 ◽  
Author(s):  
C. JAMES LI ◽  
HYUNGDAE LEE ◽  
SUK HWAN CHOI
Keyword(s):  
Gear Tooth ◽  
Tooth Root ◽  
Root Crack

Improved analytical methods for calculation of gear tooth fillet-foundation stiffness with tooth root crack

2017 ◽  
Vol 82 ◽  
pp. 72-81 ◽  
Author(s):  
Zaigang Chen ◽  
Jie Zhang ◽  
Wanming Zhai ◽  
Yawen Wang ◽  
Jianxin Liu
Keyword(s):  
Analytical Methods ◽  
Gear Tooth ◽  
Tooth Root ◽  
Root Crack

scholarly journals Finite element analysis of single pair gear tooth root crack

2019 ◽  
Vol 2019 (23) ◽  
pp. 9166-9169 ◽  
Author(s):  
Shaojun Dong ◽  
Zhongquan Luan ◽  
Chao Ma
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Gear Tooth ◽  
Single Pair ◽  
Tooth Root ◽  
Element Analysis ◽  
Root Crack

Dynamic Simulation of Planetary Gearbox With Tooth Root Crack Based on a Rigid-Flexible Coupled Model

2019 ◽  
Author(s):  
Jianchuan Dai ◽  
Hang Niu ◽  
Chenggang Hou ◽  
Xiaodong Zhang
Keyword(s):  
Crack Propagation ◽  
Dynamic Models ◽  
Gear Tooth ◽  
Coupled Model ◽  
Vibration Signal ◽  
Propagation Path ◽  
Tooth Root ◽  
Crack Propagation Path ◽  
Planetary Gearbox ◽  
Root Crack

Abstract Tooth root crack is one of the most common failures in the gearbox which can lead to the failure of the whole transmission system. However, it is difficult to simulate the gear fault impact in practical work. To solve this problem and to study the relationship between tooth crack propagation and vibration features, various dynamic models have been built. However, the crack propagation path and the bearings are simplified in most of the models, which leads to obvious deviation in the dynamic response. In this paper, a rigid-flexible coupled model of a single-stage planetary gearbox in normal and fault conditions are built by ADAMS software. The crack propagation path is considered a parabolic curve and the thickness of the crack decreases along the path. As a reference, a rigid-body model has also been built to prove that the rigid-flexible coupled model can be more accurate and suitable for analyzing the response of the planetary gearbox with fault. Afterward, the effects of gear tooth root crack size on the gear dynamics are simulated and the corresponding changes in statistical indicators are investigated. By studying the torsional vibration signal of the planetary gearbox with varying severity of the damage, the fault characteristics and damage evolution mechanics can be analyzed and by comparing the fault sensitivity of these indicators, the critical and sensitive fault indicators are screened out.

Vibration characteristics of railway locomotive induced by gear tooth root crack fault under transient conditions

2020 ◽  
Vol 108 ◽  
pp. 104285 ◽  
Author(s):  
Jianzheng Jiang ◽  
Zaigang Chen ◽  
Wanming Zhai ◽  
Tao Zhang ◽  
Yifan Li
Keyword(s):  
Gear Tooth ◽  
Vibration Characteristics ◽  
Tooth Root ◽  
Transient Conditions ◽  
Root Crack

Dynamic Features of a Planetary Gear System With Tooth Crack Under Different Sizes and Inclination Angles

2013 ◽  
Vol 135 (3) ◽  
Author(s):  
Zaigang Chen ◽  
Yimin Shao
Keyword(s):  
Planetary Gear ◽  
Gear System ◽  
Dynamic Responses ◽  
Tooth Root ◽  
Dynamic Features ◽  
Planetary Gears ◽  
Inclination Angles ◽  
Planet Gear ◽  
Planetary Gear System ◽  
Root Crack

Planetary gears are widely used in the industry due to their advantages of compactness, high power-to-weight ratios, high efficiency, and so on. However, planetary gears such as that in wind turbine transmissions always operate under dynamic conditions with internal and external load fluctuations, which accelerate the occurrence of gear failures, such as tooth crack, pitting, spalling, wear, scoring, scuffing, etc. As one of these failure modes, gear tooth crack at the tooth root due to tooth bending fatigue or excessive load is investigated; how it influences the dynamic features of planetary gear system is studied. The applied tooth root crack model can simulate the propagation process of the crack along tooth width and crack depth. With this approach, the mesh stiffness of gear pairs in mesh is obtained and incorporated into a planetary gear dynamic model to investigate the effects of the tooth root crack on the planetary gear dynamic responses. Tooth root cracks on the sun gear and on the planet gear are considered, respectively, with different crack sizes and inclination angles. Finally, analysis regarding the influence of tooth root crack on the dynamic responses of the planetary gear system is performed in time and frequency domains, respectively. Moreover, the differences in the dynamic features of the planetary gear between the cases that tooth root crack on the sun gear and on the planet gear are found.

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