A gear modification method for reducing the contact temperature of gear tooth surfaces

Abstract

The invention relates to the technical field of gear modification, in particular to a gear modification method for reducing the contact temperature of the gear tooth surface, comprising the following steps: S1: selecting the three-tooth meshing area closest to the tooth tip and the corresponding two-tooth meshing area The tooth profile of the tooth profile to be modified is used as the tooth profile to be modified; S2: The plane rectangular coordinate system (O-L X Δ), the plane Cartesian coordinate system (O-L X Δ) of the ordinate axis L X Parallel to the radial direction of the gear, the abscissa axis of the plane rectangular coordinate system is the modification amount Δ; S3: Calculate the maximum modification amount Δ of the end point relatively close to the tooth tip on the tooth profile to be modified max ; S4: Select a modification curve, the equation of the modification curve is: In the above formula, L Δ It is the ordinate of the end point relatively close to the tooth tip on the tooth profile to be modified. The invention can reduce the maximum tooth surface contact temperature when the gear teeth are meshed, and reduce or even eliminate the sudden change of the load in each meshing area of ​​the meshing gear.

Description

technical field [0001] The invention relates to the technical field of gear modification, in particular to a gear modification method for reducing the contact temperature of gear tooth surfaces. Background technique [0002] At present, in the fields of automobile, aviation, aerospace, etc., the gear system is developing in the direction of high speed, heavy load and high precision. There are higher requirements for the strength and bearing capacity of the gear teeth. Increasing the gear tooth module and lengthening the tooth width can improve the bearing capacity, but at the same time increase the volume power ratio of the gear transmission system. In this regard, some scholars propose to increase the gear coincidence degree to improve the gear bearing capacity, and call spur gears with a coincidence degree greater than 2 as a high coincidence degree gear. After the degree of coincidence increases, the total length of the contact line of the tooth surface is lengthened, a...

AI Technical Summary

Problems solved by technology

CN107255153A discloses a tooth tip repairing method for the gluing capacity of involute cylindrical gears, which can prevent gears from engaging in advance due to deformation after long-term meshing, and reduce the Hertzian stress at the tooth tip corners when entering meshing , but no solution is given for how to reduce the highest temperature point (mesh-in, mesh-out point) when the gear meshes through modification

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