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
CN109101737AInactive Publication Date: 2018-12-28SOUTHWEST JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTHWEST JIAOTONG UNIV
Publication Date
2018-12-28
Estimated Expiration
Not applicable · inactive patent

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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.
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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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