Dissertation > Aviation, aerospace > Aviation > Aero-engine ( propulsion system ) > Engine parts > Gear

Parameters Model Design and Analysis of the Steady Bulk Thermal Field in Spiral Bevel Gears

Author LiXiang
Tutor SunZhiLi
School Northeastern University
Course Mechanical Design and Theory
Keywords spiral bevel gear parameter model steady bulk thermal field
CLC V232.8
Type Master's thesis
Year 2009
Downloads 81
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Accessory gearbox of aero-engine is a mechanical transmission under the condition of high temperature, high speed and heavy load. And the spiral bevel gear of it is one of the most important transmissive components. Heat balance and contact surface of the spiral bevel gears make a notable impact on meshing performances, failure and the design and operation of gear lubrication system. Exorbitant temperature of the gear surface results in the teeth surface failure. Accordingly the analysis of the steady bulk thermal field in spiral bevel gears is very important.The main content of this paper is divided into two parts. The first part describes the parameter model design of spiral bevel gears. It is important preparatory work for the steady bulk temperature field. This paper utilizes the function of curve equation, relation and array in Pro/E. And make the parameter model design of spiral bevel gears come true by researching in the process principle of spiral bevel gears and ogenerating principle of spherical involute. It can generate corresponding3D graph with entering parameters of module, tooth number, helix angle, pressure angle, radius of a cutter head and so on. This part lays the foundation for finite element model in the steady bulk thermal field of spiral bevel gears.The second part of the paper describes the analysis of the steady bulk temperature field in spiral bevel gears. The content builds heat balance equation and boundary conditions based on heat transfer theory. The paper also analyses and works out convective heat transfer coefficient on every surface of spiral bevel gear and inputting friction of meshing surface by the means of combining finite element method with theoretical analysis. It finally works out The distribution of the steady bulk thermal field in spiral bevel gears by ANSYS10.0and make comparison and analysis to the results, and eventually come to the conclusion of factors to affect thedistribution of temperature in the steady bulk thermal field of spiral bevel gears.

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