Study on Wear Characteristics Evolution of Helical Gear with Linear Initial Defect

線形初始缺陷斜齒輪磨損特征演變研究

Yuqi Zhu(朱玉麒) ； Wei Yuan(袁偉) ； Qianjian Guo(郭前建) ； Liguo Zhang(張立國) ； Wenhua Wang(王文華) ； Peng Xue(薛鵬)

《中國機械工程學刊》 43卷6期 (2022/12) Pp. 521-529

摘要

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.

關鍵字

helical gear ； linear initial defect ； wear forms ； surface wear scars

並列摘要

對於風電、船舶等需要機器在惡劣工況條件下工作的領域而言，齒輪的初始缺陷極大地影響了這些機器的工作性能。本文研究了線形初始缺陷對斜齒輪磨損特征演變的影響，使用激光打標器沿齒寬方向加工出線型初始缺陷，並采用無初始缺陷齒輪進行對照。通過顆粒計數器和鐵譜分析技術對油樣中磨損粒子數量、狀態進行分析，並用掃描電鏡觀測齒面磨損情況。本研究為惡劣工況條件下齒輪磨損狀態評估提供了參考，實驗結果表明：線形初始缺陷改變了輪齒的嚙合狀態，使得齒輪的正常磨損壽命縮短了約45%，穩定磨損階段的磨損率增加了約56%，且缺陷齒輪節圓位置發生了大量的點蝕現象以及齒面的塑性流動。此外，潤滑油失效產生的油汙以及軸承損傷產生的硬質顆粒進入嚙合表面及裂紋處，加速了齒輪的磨損進程。