A method for calculating the time-varying meshing stiffness of spur gears considering the effect of temperature

A technology of spur gears and time-varying meshing stiffness, which is applied in calculation, computer-aided design, special data processing applications, etc., and can solve problems such as low calculation accuracy and inability to accurately and completely describe the dynamic characteristics of gear transmission systems

Inactive Publication Date: 2018-12-28
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

Therefore, the time-varying mesh stiffness calculated without considering the gear temperature factor cannot accurately and completely describe the dynamic characteristics of the gear transmission system, and its calculation accuracy is relatively low

Method used

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  • A method for calculating the time-varying meshing stiffness of spur gears considering the effect of temperature
  • A method for calculating the time-varying meshing stiffness of spur gears considering the effect of temperature
  • A method for calculating the time-varying meshing stiffness of spur gears considering the effect of temperature

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Embodiment Construction

[0033] The specific implementation of the present invention will be described in detail below by taking the structural parameters of the spur gear shown in Table 1 as an example in conjunction with the accompanying drawings, so that those skilled in the art can understand the present invention. However, it should be clear that the embodiments described below are only some, not all, embodiments of the present invention. Without departing from the spirit and scope of the present invention defined and determined by the appended claims, all other embodiments obtained by persons of ordinary skill in the art without any creative effort shall fall within the protection scope of the present invention.

[0034] refer to figure 1 and figure 2 , a calculation method for the time-varying mesh stiffness of spur gears considering the influence of temperature includes the following steps:

[0035] (1) Calculate the tooth bending stiffness k b , shear stiffness k s , Axial compression st...

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Abstract

The invention discloses a method for calculating the time-varying meshing rigidity of a spur gear considering the influence of temperature. Considering the influence of the working environment temperature (steady state environment temperature) of the gear pair, the instantaneous temperature of the tooth surface generated by the friction heat of the driving wheel/driven wheel is calculated according to the Coleman theory, and the mathematical expression of the tooth surface contact temperature changing with time is derived. The results show that the contact temperature of the driving wheel/driven wheel is higher than that of the driven wheel. The thermal deformation of the tooth profile of the driven wheel and the driven wheel caused by the change of the tooth surface contact temperature iscalculated, and the temperature stiffness of the tooth caused by the change of the temperature is calculated. Finally, the time-varying meshing stiffness of gears is calculated according to the theory of rigidity series and parallel, combined with the bending stiffness, shear stiffness, axial compression stiffness, contact stiffness, tooth base stiffness and temperature stiffness of gears.

Description

technical field [0001] The invention relates to the technical field of mechanical dynamics, in particular to a method for calculating the time-varying meshing stiffness of spur gears considering the influence of temperature. Background technique [0002] High-precision, high-reliability spur gear transmission system is widely used in transportation, aerospace, precision instruments, automatic control and other fields. In special and extreme environments, the ambient temperature of spur gears is -20°~ Change within +80°. The change of the gear meshing force due to the periodic change of the meshing stiffness of the gear teeth is one of the main internal excitation forms of the gear transmission system. Usually, this periodic change of the meshing stiffness is called time-varying meshing stiffness; in the transmission of motion and power During the process, the time-varying meshing stiffness directly affects the load-carrying capacity, transmission error, tooth profile modifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F2119/08
Inventor 王俊国孙锐吕博任敏强
Owner SOUTHWEST JIAOTONG UNIV
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