RESEARCH OF THE STRESS-STRAIN STATE OF THE GAS DISTRIBUTION MECHANISM DESIGN ELEMENTS USING THE DEVELOPED 3D MODELS
Abstract
The necessity of maintaining the existing fleet of rolling stock in a reliable and efficient condition is substantiated due to the implementation of experimental and calculation studies of the units and parts of the mechanical system of locomotives. In the mechanical system of the locomotive, as one of the most important, the cam mechanism of the gas distribution of the locomotive power plant is allocated, which is responsible for regulating the operation of the entire mechanical system.
The aim of the research, which consists in describing the stress-strain state of the elements of the design of the gas distribution mechanism, is singled out.
The expediency of carrying out experimental studies using the developed 3D models of the design elements of the mechanism of the gas distribution of transport diesels is substantiated. The economic feasibility of the proposed approach for carrying out experimental studies using modern software is noted. This approach does not require special techniques, measuring and recording equipment.
A fragment of the geometric 3D model of the exhaust valve drive is presented and the corresponding structural elements, among which are cams, a roller, a pusher, a bar, a traverse and valves are selected. As the most compliant element, the rod of the gas distribution mechanism of the internal combustion engine was chosen.
The results of the study of a simplified geometric model of the rod, conducted using modern software, as well as the parameters of the research and grid parameters, are presented.
The elaborated refined 3D model of the rod is presented, which most corresponds to the real design, as well as the results of investigation of its stress-strain state in the form of linear strains and normal stresses.
The expediency of using refined geometric models as those that most correspond to experimental data is substantiated.
The recommendations on the use of the developed models in the assessment and refinement of the laws of motion of links in the mechanical system of power plants of locomotives are given.
Keywords: diesel engine, valve actuator, a geometric model.
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