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The Contact Analysis and Profile Modification of the Involutes Gear

Author: ChenYiDong
Tutor: TangGuoJin
School: National University of Defense Science and Technology
Course: Mechanics
Keywords: Involute cylindrical gear Static contact Dynamic contact Engagement theory Tooth Profile
CLC: TH132.41
Type: Master's thesis
Year: 2007
Downloads: 568
Quote: 6
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Abstract


Involute cylindrical gears are widely used in manufacturing , mining , metallurgical industries . The tooth contact state gear meshing and kinetic properties of great influence , so research involute cylindrical gears static and dynamic contact performance is of great significance . Involute cylindrical gear tooth profile equation expression is derived to calculate the parameters of each tooth , gear parametric model . Consider the impact of changes of the coincidence degree and the coefficient of friction , the application of ANSYS finite element analysis software to analyze the static gear contact stress distribution . In contrast with the traditional formula of Hertz , the result is fairly accurate . The use of the APDL the program language organization ANSYS finite element analysis of the command , the applied the parameterized load , parameterized solving and parameterized post-processing results display . The finite element analysis of the entire process parameter , which is the highest technology of ANSYS batch analysis . Simple modifications in the parametric analysis of the process parameters to achieve the purpose of repeated analysis of a variety of sizes and different load size , which greatly improve the efficiency of the analysis , to reduce the cost of analysis . Analysis based on the explicit dynamic finite element software ANSYS / LS -DYNA involute cylindrical gear dynamic analysis model and draw gear dynamic contact stress distribution changes over time . Relative to the static contact analysis , dynamic contact analysis of the results is more intuitive, more real-time . Based the engagement principle and coordinates transform theory , solving gear position error state . And on this basis , a detailed analysis of the gear contact stress distribution in the error state . The analysis shows that , considering the gear center error and gear shaft misalignment error state static and dynamic contact stress analysis results are more in line with the actual situation . Based on the the gear modification of basic principles , the introduction of the ANSYS finite element analysis software , cylindrical gear involute gear tooth profile modification error , deformation of the contact stress distribution and meshing line draw the meshing line under the different amount of modification circumstances under which it may determine the optimal amount of modification of the cylindrical gear involute .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanical parts and gear > The transmission mechanism > Meshing > Gears and gearing
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