Types and Constructions of Vibration Exciters of Modern Engineering

Abstract

One of the ways to increase the fatigue strength and wear resistance of parts is defamation of the surface layer of the working surfaces of the parts as a whole and in stress concentration zones. Plastic deformation takes place when the load increases, which is higher than the elastic strength of the material, as the metal strengthens during the deformation process. The bulk of industrial alloys have a polycrystalline structure. During the deformation of polycrystals, there is no sliding stage, the deformation of the grains begins immediately along several sliding systems and is accompanied by bending and twisting of the sliding planes. The total deformation is small and amounts to 1%, the grains are deformed heterogeneously due to their different orientation in relation to the applied loads. As the deformation changes, the difference between the grains of the material decreases and the microstructure changes: the metal grains are gradually pulled out in the direction of the plastic flow, which leads to a change in the grains of the crystal lattice of the metal with an increase in the density of defects. The reliability of machine parts primarily depends on their strength, wear resistance, vibration resistance, heat resistance, etc. These criteria for the reliability of machine parts are provided by various methods and measures during their manufacture, such as: material selection and various methods of increasing strength and wear resistance - heat treatment, treatment by various physical methods of the surface of the part and areas of stress concentration, etc. The introduction of modern methods and tools in the development of mechanical engineering ensures an increase in the reliability of parts and products in general, as well as a reduction in the cost of production. This article analyzes the types and designs of known vibration equipment and vibration exciters used in mechanical engineering. The structural diagram of vibration equipment production is considered. Determination of the main advantages and disadvantages of vibration equipment and vibration exciters.