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首页> 外文会议>29th Leeds-Lyon Symposium on Tribology Sep 3-6, 2002 University of Leeds, UK >Self-Lubricating Dry Rubbing Bearings - Fundamentals and Methods of Calculation
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Self-Lubricating Dry Rubbing Bearings - Fundamentals and Methods of Calculation

机译：自润滑干式摩擦轴承-基本原理和计算方法

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摘要

Following a general discussion about the construction and the lubrication mechanisms of compound bearings made of a steel backing with a porous bronze layer filled with a PTFE/solid lubricant mixture, problems in conjunction with the use of pU diagrams are pointed out. Instead of pU values parameters such as the overlap ratio, the compressive strain or the shear stress ratio for example which are important for a reliable design of dry rubbing bearings are represented then. As basis for the friction calculation a relationship between the shear stress ratio and the quotient of the compressive strain and the overlap ratio was experimentally found and the temperature-dependent curves of the Young's modulus and of the shear strength of PTFE are shown. After that, the contact angle influenced by deformation, wear and temperature rise is examined and an approximation equation for determining the contact angle is introduced. A method for calculating temperature, friction and working life of dry rubbing bearings that is based on theoretically and experimentally established data is offered afterwards. In addition the positive effect of a wear particle trap is demonstrated. Finally, calculation examples show the mode of operation of the calculation method.
机译：在对由钢衬里制成的复合轴承的结构和润滑机理进行了一般性讨论之后，该复合材料由填充有PTFE /固体润滑剂混合物的多孔青铜层制成，指出了与使用pU图有关的问题。代替pU值的参数例如重叠率，压缩应变或剪切应力比，这些参数对于干摩擦轴承的可靠设计很重要。作为摩擦计算的基础，通过实验找到了剪切应力比与压缩应变的商和重叠率之间的关系，并显示了杨氏模量和PTFE的剪切强度随温度变化的曲线。之后，检查受变形，磨损和温度升高影响的接触角，并引入确定接触角的近似方程式。随后提供了一种基于理论和实验数据来计算干式摩擦轴承的温度，摩擦和使用寿命的方法。此外，还展示了磨损颗粒捕集器的积极作用。最后，计算示例显示了该计算方法的操作模式。

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