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CSME 2022/08
Volume 43 No.4
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337-345
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Study on Wear Characteristics Evolution of Helical Gear with Linear Initial Defect
Yuqi Zhua, Wei Yuana, Qianjian Guoa, Liguo Zhanga, Wenhua Wanga and Peng Xueb
aSchool of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China
bNational Engineering Research Center for Production Equipment, Dongying 257091, China
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Abstract:
For wind power, ships, and other fields that require machines to work under harsh working conditions, the initial defects of gears greatly affect the working performance of these machines. The influence of linear initial defects on the evolution of wear characteristics of helical gears was studied. The laser marking device was used to process the linear initial defect along the tooth width direction, and the gear without the initial defect was used for comparison. The number and state of wear particles in oil samples were analyzed by particle counter and ferrography, and the wear condition of the gear surface was observed by scanning electron microscope. This study provides a reference for the evaluation of gear wear under harsh working conditions, it can be concluded that the linear initial defect changed the meshing state of the gear tooth, the normal wear life of the gear is shortened by about 45%, and the wear rate in the stable wear stage is increased by about 56%, a great deal of pitting corrosion and plastic flow on the tooth surface occurred in the pitch circle position of the defective gear. In addition, the lubrication condition deteriorated in the later period caused by lubricating oil pollution and the hard particles falling off the gearbox bearings entered the meshing surface and the emerged crack, which further accelerated the wear process of the gear.
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Keywords: helical gear, linear initial defect, wear forms, surface wear scars.
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©
2022
CSME , ISSN 0257-9731
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