Gear profile modification method based on vibration reliability and genetic algorithm

Abstract

The invention discloses a gear profile modification method based on vibration reliability and a genetic algorithm, belonging to the technical field of reliability designs. The gear profile modification method can not only reduce meshing impact due to elastic deformation and manufacturing errors, but also reduce the meshing excitation of a gear so that a gear system has smooth transmission, the vibration and the noises are reduced, and the reliability and service life of the gear system can be improved. The gear profile modification method comprises the following steps of: (1), establishing an elastic modification virtual prototype for meshing between a gear and a modifying gear; (2) carrying out dynamic simulation on gear transmission errors in the process of an involute profile and the profile modification; (3) analyzing the reliability sensitivity of the transmission errors at the time of gear pair random parameter meshing; (4) determining optimal parameters of the gear profile modification by utilizing the genetic algorithm; and (5) verifying the correctness of the parameters.

Description

technical field [0001] The invention belongs to the technical field of reliability design, in particular to a gear tooth profile modification method based on vibration reliability and genetic algorithm. Background technique [0002] Gear modification technology is listed as a category I research problem among the 16 key technologies of gears. Gear modification technology is the key technology in the design and manufacture of high-precision gear transmission, and it is the most important means to reduce vibration and improve the reliability of high-speed heavy-duty gear transmission. Tooth profile modification is a way of gear modification technology. Tooth profile modification is to modify a part of the original involute tooth profile at the top of the tooth or near the fillet of the root to ease the change of meshing stiffness and reduce the The meshing-in and meshing-out impacts caused by the error of the base joint and the deformation under load can improve the lubricati...

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Problems solved by technology

Although these research methods have determined the size of the modification amount and the selection of the modification parts, etc., because the calculation model of the meshing stiffness and elastic deformation of the gear teeth is not accurate enough, and the modification parameters are generally accurate to microns, it is determined that the modification The parameter method cannot accurately guide the gear tooth profile modification design; and because it is very difficult to design gear modification parameters considering the actual dynamic characteristics of the gear, most current methods for reducing gear vibration are based on static calculations

Most of the research on this kind of method focuses on the geometric interference of gear teeth, load mutation and other issues. However, the method of accurately determining the tooth profile modification parameters is still immature, and it is difficult to meet the requirements of heavy load, high speed and high precision for large and complex mechanical transmission.

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