不同润滑状态下农机传动用链条的磨损特性

以三轮农用车链条为例，研究了不同润滑状态下农机传动用链条的磨损形式与机理，指出了定期人工滴油润滑的外驱动链条的主要磨损形式是以磨粒磨损为主，并伴随着疲劳磨损；油池润滑的内驱动链条的主要磨损形式是疲劳磨损。通过对其表面形貌分析，探讨了不同润滑状态下的链条磨损特性，提出了套筒和销轴零件表面硬度的主匹配关系。

Wearing Characteristic of Transmission Chains under Different Lubrication Conditions Used for Agricultural Machinery

The wearing pattern and mechanism of transmission used for a farm three wheel transport vehicle were studied under various lubrication conditions in this work. The results of the chain wearing tests carried out on road showed that the wearing pattern of the external driving chains under the timed, brush lubricated condition was mainly the abrasive wear of the bearing pins companying with stress fatigue wear; while that of the internal driving chains under the oil pool lubrication was mainly the stress fatigue wear of the bushes and bearing pins, in which the formation of cracks and their propagations were the key factors to affect the chains fatigue life. The wearing characteristic of roller chains was investigated under various lubrication conditions by analyses of their surface features and the optimal values and matching relations of the surface hardness for the bushes and pins were recommended.