A Calculation Method of Time-varying Mesh Stiffness of Spur Gears Considering the Effect of Temperature

A technology of time-varying meshing stiffness and spur gears, which is applied in calculation, computer-aided design, geometric CAD, etc., can solve the problems such as the inability to accurately and completely describe the dynamic characteristics of the gear transmission system and the low calculation accuracy.
CN109101737BInactive Publication Date: 2020-08-18SOUTHWEST JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHWEST JIAOTONG UNIV
Publication Date
2020-08-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for calculating the time-varying meshing stiffness of spur gears considering the influence of temperature. This method takes into account the influence of the working environment temperature of the gear pair (steady-state ambient temperature). According to Coleman theory, the instantaneous temperature of the tooth surface generated by frictional heat when the driving wheel / driven wheel meshes is calculated, and the mathematics of the tooth surface contact temperature changing with time is derived. Expression; Calculate the tooth profile thermal deformation of the driving wheel and the driven wheel tooth caused by the contact temperature change of the tooth surface, so as to calculate the temperature stiffness of the tooth caused by the temperature change; Finally, according to the stiffness series and parallel theory, combined with the tooth bending stiffness, The shear stiffness, axial compression stiffness, contact stiffness, tooth base stiffness and temperature stiffness are used to calculate the time-varying mesh stiffness of the gear.
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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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