Abstract
Different types of linear bearings (guides) are widely used in practice in various equipment, as in many other areas of human activity. In particular, this applies to cylindrical guides (linear plain bearings) of reciprocating motion. However, despite their considerable distribution, in fact, there are no reasonable methods for calculating the wear and service life of not only metal but also metal-polymer linear bearings. According to the author's method, the influence of load, base diameter and radial clearance on the maximum initial pressures in this bearing was investigated within the plane contact problem of the theory of elasticity. Further, using the computational method according to the author's tribokinetic model of wear during sliding friction, the effect of the composite bushing wear on the change of the initial contact characteristics (contact pressures and contact angle) was evaluated. The forecast calculation of the service life of the bearing depending on the above factors is also carried out. Quantitative and qualitative regularities of dependence of contact pressures and a resource on the accepted factors are established.
Highlights
IntroductionLinear plain bearings (plain and cylindrical guides), which provide reciprocating motion in mobile connections, are widely used both in mechanical engineering and in many other areas
Linear plain bearings, which provide reciprocating motion in mobile connections, are widely used both in mechanical engineering and in many other areas
The use of hybrid pairs of materials with significantly different strength, elastic characteristics, deformability and wear resistance in linear plain bearings requires the creation of appropriate calculation methods by which at the design stage it would be possible to assess contact pressures, wear and service life
Summary
Linear plain bearings (plain and cylindrical guides), which provide reciprocating motion in mobile connections, are widely used both in mechanical engineering and in many other areas. They have a base made of steel or cast iron, and a slider bus– hing made of bronze or anti-friction cast iron. A hybrid combination of materials friction pair is increasingly used, when one of its elements may be made of composite polymeric materials. Such technologies are used to restore worn contact surfaces by applying a layer of composite material. In these hybrid friction pairs, the materials will have fundamentally different strength, elastic characteristics and wear resistance
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