One-way Thermal-Fluid-Solid Coupling Analysis of Helicopter Tail Reducer with Spiral Bevel Gear

Dongping Sheng, Zhongyuan Ma, Chenqi Zhou, Haidong Feng, Hun Guo, Chun Su

Abstract


This research focuses on investigating the thermal-fluid-solid coupling behavior within spiral bevel gears to enhance the bearing capacity and extend the operational service life of the gear reducer located in the helicopter tail gearbox. The study commences by constructing detailed, parametrically defined three-dimensional digital models. These models accurately represent the critical components: the spiral bevel gear itself, the surrounding gearbox housing, and the supporting gear shaft, based directly on the specifications of an actual helicopter tail reducer assembly. Subsequently, the analysis proceeds with a one-way, steady-state thermal-solid coupling simulation performed on the established model assembly. This critical simulation phase aims to realistically replicate the thermal energy transfer process, explicitly treating the lubricating oil circulating within the system as the primary heat generation source. Simultaneously, it evaluates the consequent structural response and mechanical deformation of the gear reducer components under the influence of this sustained thermal loading. Crucially, during this computational analysis phase, the material properties and parameters specific to the gear alloy are meticulously incorporated. This inclusion is vital for achieving more precise and reliable predictions concerning the resultant thermal stress fields and deformation distributions throughout the gear structure. The investigation successfully elucidates the significant impact of heat flux magnitude and distribution on the overall structural stability and integrity of the gearing system. These findings furnish a robust theoretical foundation essential for optimizing future gear design parameters and enhancing performance reliability under demanding real-world operational conditions encountered in helicopter applications.

Keywords


Helicopter tail reducer, spiral bevel gear, thermal-fluid-solid coupling, FEA

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DOI: http://dx.doi.org/10.17977/um016v9i22025p392

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