Self-lubricating gears with oil-impregnated sintered materials
Self-lubricating gears with oil-impregnated sintered materials
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DOI：
10.1007/s10010-017-0227-z
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发表时间：
2017-09
期刊：
影响因子：
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通讯作者：
M. Ebner;T. Lohner;K. Michaelis;B. Höhn;K. Stahl
中科院分区：
文献类型：
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作者：
M. Ebner;T. Lohner;K. Michaelis;B. Höhn;K. Stahl
这项研究显示了基于油浸烧结材料的自润滑齿轮的工作行为的第一个结果。术语自润滑是指从开孔烧结齿轮中渗出并为齿轮接触提供润滑的油。实验在FZG高效齿轮试验台上进行。因此，小齿轮由开孔的、表面硬化的烧结钢制成并浸有油，而轮由常规的表面硬化钢制成。在由负载和圆周速度定义的各种操作条件下，测量小齿轮和车轮的总扭矩损失和整体温度。齿轮接触中的平均摩擦系数来自扭矩损失测量。结果表明，自润滑摩擦学系统与油浸渍烧结材料可以从模型试验台转移到齿轮。平均摩擦系数显示了外部润滑齿轮的数量级。试运行后的齿面显示出部分明显的磨损。由于自润滑的热耗散是有限的，因此本体温度和热负荷极限显著影响操作行为。进一步的工作将集中在了解自润滑，高负荷弹流接触的润滑膜形成的机制和扩展的热负荷限制。
This study shows the first results on the operating behavior of self-lubricating gears based on oil-impregnated sintered material. The term self-lubrication is referred to as oil that bleeds from the open-pored sintered gear and providing lubrication to the gear contact. Experiments were carried out at the FZG efficiency gear test rig. Thereby, the pinion was made of open-pored, case-hardened sintered steel and impregnated with oil, and the wheel was made of conventional case-hardened steel. The total loss in torque and the bulk temperatures of the pinion and wheel were measured for various operating conditions defined by load and circumferential speed. The mean coefficient of friction in the gear contact was derived from the torque loss measurements. Results confirm that self-lubricating tribological systems with oil-impregnated sintered materials can be transferred from model test rigs to gears. The mean coefficient of friction shows the order of magnitude of externally lubricated gears. The tooth flanks after test runs show partially noticeable wear. As the heat dissipation of self-lubrication is limited, bulk temperatures and thermal load limits influence operating behavior significantly. Further work will focus on understanding the mechanisms of the lubricant film formation of self-lubricated, highly-loaded EHL contacts and on extending the thermal load limits.