Abstract

The factors influencing the reliability and durability of the joint between a shaft and a rubber reinforced seal are analyzed. It has been established that the theory of tightness of such joints has not yet been developed. The quality of a joint is usually assessed by the amount of leakage. It has been revealed that the amount of leakage depends on the materials from which the shaft and seal are manufactured, the roughness of the shaft surface, the presence of dust in the friction zone, the quality of the sealed liquid, and the operating temperature. In addition, the durability of the work is influenced by macrogeometry parameters like deviation from the perpendicularity of the seal to the shaft, deviation from coaxiality, and radial runout of the shaft. A multifactorial experiment has been carried out, as a result of which an empirical relationship has been established between the radial runout of the shaft, rotational speed, and interference in the joint according to the criterion of the onset of leaks. Analysis of the obtained dependence showed that the radial runout should be compensated by interference in the joint, and with an increase in the rotation speed, the compensation value should be greater due to the fact that the working edge of the seal does not have time to follow the shaft. An empirical relationship between the amount of interference and leakage has been obtained, which indicates that with lower interference, leakage will be greater. The research results can be used at the stage of designing assembly units with seals to reduce the influence of radial runout and deviations from the coaxiality of the shaft relative to the seal.

中文翻译：

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宏观几何参数对轴封接头密封性影响的研究

摘要

分析了影响轴与橡胶密封件连接可靠性和耐久性的因素。已经确定的是，这种接头的紧密性理论尚未发展。接头的质量通常通过泄漏量来评估。据透露，泄漏量取决于制造轴和密封件的材料、轴表面的粗糙度、摩擦区域是否存在灰尘、密封液体的质量以及工作温度。此外，工作的耐用性还受到宏观几何参数的影响，例如密封件与轴的垂直度偏差、同轴度偏差以及轴的径向跳动。进行了多因素实验，根据泄漏开始的标准，在轴的径向跳动、转速和接头干涉之间建立了经验关系。对所得关系的分析表明，径向跳动应通过接头处的过盈量来补偿，并且随着转速的增加，由于密封件的工作边缘没有时间来补偿，补偿值应更大。跟随轴。已经获得了干扰量和泄漏量之间的经验关系，这表明干扰越低，泄漏就会越大。研究结果可用于设计带有密封件的装配单元阶段，以减少径向跳动和轴相对于密封件的同轴度偏差的影响。