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Time-varying meshing stiffness solution of planetary gear based on improved energy method

A technology of time-varying meshing stiffness and planetary gears is applied in the dynamic model of planetary gearbox considering the deformation of the wheel body, the solution of time-varying meshing stiffness of planetary gears, and the field of time-varying meshing stiffness of gear teeth. The solution of gap and time-varying mesh stiffness is complex

Pending Publication Date: 2018-12-21
BEIJING UNIV OF TECH
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Problems solved by technology

[0004] Scholar LiangXihui studied the solution of the time-varying mesh stiffness of the planetary gear crack fault based on the energy method, but the influence of the deformation of the wheel body was not considered in the established model, and the time-varying mesh stiffness obtained from the solution was inconsistent with the actual planetary gear time-varying mesh stiffness. There is a gap; the scholar Cui Lingli studied the solution of the meshing stiffness of a pair of gears, but the planetary gearbox contains many pairs of gears meshing at the same time, and the solution of the time-varying meshing stiffness is complicated

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  • Time-varying meshing stiffness solution of planetary gear based on improved energy method
  • Time-varying meshing stiffness solution of planetary gear based on improved energy method
  • Time-varying meshing stiffness solution of planetary gear based on improved energy method

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[0073] The present invention will be further described below in conjunction with the accompanying drawings and examples.

[0074] Such as figure 1 Shown is a working flow chart of the method for solving the time-varying meshing stiffness of planetary gears based on the improved energy method of the present invention. The specific implementation process is as follows:

[0075] (1) Set up a kind of planetary gearbox dynamics model considering the deformation of the wheel body: set up a kind of planetary gearbox dynamics model containing crack faults considering the deformation of the wheel body. The present invention takes the planetary gear system as the research object, considering many In the case of gear pair clearance, time-varying mesh stiffness, error excitation and wheel body stiffness, a nonlinear dynamic model of the planetary gear system with multiple clearances, variable parameters and bending-torsion coupling is established to solve the planetary gear system more ...

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Abstract

The invention discloses a method for solving the time-varying meshing rigidity of a planetary gear based on an improved energy method. In the case of considering the relationship between a base circleand a tooth root circle, the invention establishes an improved cantilever beam model considering the deformation of a wheel body by taking 42 teeth as a limit. The time-varying meshing stiffness of each pair of planetary gears is discussed. Based on the consideration of gear deformation, the potential energy method is used to solve the more accurate time-varying meshing stiffness of gear teeth, and compared with the traditional potential energy method. The accuracy of the method is verified by comparing the results with those of finite element method.

Description

technical field [0001] The invention belongs to the technical field of mechanical dynamics, and relates to a method for solving the time-varying meshing stiffness of planetary gears based on the improved energy method, especially establishing a dynamic model of a planetary gearbox considering the deformation of the wheel body, and applying the potential energy method to solve it more accurately A time-varying mesh stiffness method for gear teeth. Background technique [0002] Planetary gears are widely used in various mechanical equipment as elements for transmitting motion and force. Time-varying meshing stiffness is one of the main inherent dynamic excitations inside planetary gears, so it is of great significance to study the meshing stiffness of planetary gears. Among the calculation methods of time-varying meshing stiffness of gears, the potential energy method has been widely studied by domestic and foreign scholars because of its high calculation efficiency and accura...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F2119/06
Inventor 崔玲丽李贝贝张跃明姜宏王鑫
Owner BEIJING UNIV OF TECH
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