АСПЕКТЫ ОБЕСПЕЧЕНИЯ ГЕРМЕТИЧНОСТИ ПОСАДОК С НАТЯГОМ В СЛОЖНЫХ УСЛОВИЯХ ЭКСПЛУАТАЦИИ ИЗДЕЛИЙ

Abstract

The study objective is to discover optimal technical solutions in the field of ensuring tightness of interference fits in difficult operating conditions of products. 
 As a result of analyzing the problem of technological ensuring tightness and reliability of interference fits at the stage of their design, it is found that the use of regular microrelief and special types of coatings of joint faces can provide a solution to the problem. It is found that the characteristics of the microrelief and the physico-mechanical properties of the joint faces, as well as the assembly method, have a significant effect on the contact density and hermetic connection of the parts. It is shown that by controlling the microgeometry of the of joint faces, the use of soft electroplating coatings and anaerobic materials in the assembly, it is possible to increase the actual contact area and tightness of the joints significantly. The novelty of the work is in a broad consideration and generalization of the constructive and technological provision of tightness of interference fits, the aspects of increasing the tightness and reliability of interference fits are also considered. Analysis of scientific sources has shown that the tightness of the joint under dynamic load significantly depends on the parameters of microgeometry and the physical and mechanical characteristics of the materials of the joint faces of the parts that determine their actual contact area. The directions of ensuring tightness of interference fits, especially those operating in critical conditions, are observed.