An Approach to Determine and Analyze the Wear Rates at Cage Pocket Contacts in Solid-Lubricated Rolling Bearings
An Approach to Determine and Analyze the Wear Rates at Cage Pocket Contacts in Solid-Lubricated Rolling Bearings
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DOI：
10.1080/10402004.2019.1640329
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发表时间：
2019-07
影响因子：
2.1
通讯作者：
R. Dahiwal;S. Pörsch;Markus Löwenstein;B. Sauer
中科院分区：
文献类型：
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作者：
R. Dahiwal;S. Pörsch;Markus Löwenstein;B. Sauer
摘要固体润滑滚动轴承在许多技术系统中广为人知，在这些系统中，由于真空或高温等临界条件，传统润滑（如油或油脂）失效。聚合物笼（例如，在轴承部件上具有二硫化钼（MoS2）颗粒和银（Ag）涂层的聚酰亚胺）已被证明是能够显著增加固体润滑滚动轴承的使用寿命的干式润滑剂。已经证明，在轴承运行期间，保持架的材料颗粒转移到滚道上并润滑轴承。因此，能量由于球笼凹座界面处的瞬时滑动而耗散。作为这种行为的结果，保持架除了用作润滑储存器之外还经历磨损。为了描述保持架兜孔处的润滑传递量或磨损体积，必须估计材料特定的磨损率。这一贡献介绍了一种方法来确定和分析在球笼袋接口的磨损率。在本文中，仅显示了特定操作条件下的润滑涂层的一个示例，但该方法也适用于其他情况。这种分析是通过在高真空条件下进行轴承实验以及结合计算建模来实现的。作为结果，考虑了两个方面。目前的贡献提供了深入了解的程序，以估计材料的特定磨损率。此外，它还展示了如何分析磨损率数据分布。这项工作的未来范围是模型开发的输入，以在一定程度上预测和优化此类轴承的使用寿命。
Abstract Solid-lubricated rolling bearings are widely known in many technical systems where conventional lubrication, such as oil or grease, fails due to critical conditions like vacuum or high temperatures. Polymeric cages (e.g., polyimide) endowed with molybdenum disulfide (MoS2) particles and silver (Ag) coating on the bearing components have proven themselves as dry lubricants that could significantly increase the service life of solid-lubricated rolling bearings. It has been demonstrated that during the bearing operation, material particles of the cage are transferred onto the raceways and lubricate the bearing. Thereby, the energy dissipates due to the momentary sliding at the ball–cage pocket interface. As a result of this behavior, the cage experiences wear apart from serving as a lubrication reservoir. In order to describe the lubrication transfer amount or the wear volume at the cage pocket, it is essential to estimate the material-specific wear rate. This contribution introduces an approach to determine and analyze the wear rates at the ball–cage pocket interface. In this article, only one example of lubrication coatings with specific operating conditions are shown, but the approach applies to other cases as well. This analysis has been achieved by performing bearing experiments under high vacuum conditions together with the combination of computational modeling. As an outcome, there are two aspects considered. The present contribution provides insight into the procedure to estimate material-specific wear rates. Additionally, it shows how wear rate data distribution can be analyzed. The future scope of this work is the input for the development of the model to predict and optimize the service life of such bearings to some extent.