Heat transfer and lubrication of turboshaft motor-reducer

[摘要] Turboshaft engines, as the rule, contains gear transmission unit - reducer and belong to the group of drive systems with the name motor-reducer. These are the compact and autonomous assemblies for various applications. In the case of turboshaft engine in combination with high speed reducer, arise the set of phenomenon which has to be solved. Majority of them are in relation to reducer protection of overheating and of gears and bearings failures. The article contains analysis of heat sources, heat transfer through design structure and heat taking out in order to maintain acceptable temperature level of reducer lubricant. Theoretical discussions are supported with various experimental results and testing procedures, including analytic calculations. The set of design solutions for reducer protection when reducer located in the area of hot gas flow, is the main content. The case study is innovative design of turboshaft motor-reducer with free turbine which provides flexible operation and compact design structure.

[发布机构] University of Belgrade, Faculty of Mechanical Engineering, Kraljice Marije 16, Belgrade; 1120, Serbia^1

[效力级别] 机械制造 [学科分类] 工业工程学

[关键词] Analytic calculations;Autonomous assembly;Flexible operation;Gear transmissions;Innovative design;Temperature level;Testing procedure;Turbo-shaft engines