Aviation spur gear shape modification method based on dynamic simulation

Abstract

The invention belongs to the technical field of structural strength simulation, and particularly relates to an aviation spur gear shape modification method based on dynamic simulation. The method comprises the following steps: establishing a spur gear three-dimensional mathematical model by utilizing three-dimensional modeling software, entering finite element grid division software, importing the spur gear three-dimensional mathematical model, setting finite element division conditions, and performing grid division; importing the grid model into finite element analysis software, setting material parameters, setting calculation conditions and carrying out calculation; viewing and checking a gear dynamic simulation result; modifying the shape of the gear in three-dimensional software, and improving the contact state. The dynamic meshing process of the gear can be visually displayed, the problems of gear interference, abnormal contact of tooth crests and tooth roots and the like possibly occurring in design and use can be found in time, and the contact state can be effectively improved through gear shape modification; according to the method, the dynamic stress change in the gear meshing process can be obtained, the stress result is checked, the operation stability is checked, and the finite element simulation accuracy of the aviation high-speed heavy-load spur gear is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of structural strength simulation, in particular to an aviation spur gear modification method based on dynamic simulation. Background technique [0002] Spur gears are one of the most critical and commonly used structures in aviation transmission systems. Due to their high speed and large transmission loads, non-design contact areas such as tooth tops and dedendums are prone to meshing and gear eccentric loads during use. . In the slightest, it will cause abnormal contact marks of the gears, and in severe cases, the gears will be pitted, worn and even the teeth will be broken. Among them, the phenomenon of abnormal contact marks of gears is the most common. In order to accurately simulate the motion process of gears and check the motion state of gears, it is necessary to perform dynamic simulation on them, check the stress and contact conditions of gear teeth when they mesh in and out, and find that they ar...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention: to provide a modification method for aviation spur gears based on dynamic simulation, to simulate the dynamic meshing process of gears, to identify problems in the dynamic meshing process of gears, and to carry out gear modification in a targeted manner, so as to improve high-speed and heavy-duty straight gears in aviation. Abnormal contact marks, unbalanced load, abnormal wear and excessive local stress of gears during work

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