Turboprop engine reduction gearbox unit

Abstract

The invention relates to the field of turboprop engines, and discloses a turboprop engine reduction gearbox unit which comprises a reduction gearbox shell and a lubricating oil pump set; a transmission system is arranged in an inner cavity of the reduction gearbox shell and used for connecting an input shaft and a paddle shaft, and can reduce the rotating speed of the input shaft and transmit the rotating speed to the paddle shaft; a torque measuring assembly is further arranged, and the torque measuring assembly can monitor torque parameters of the engine; and a mounting joint of the engine is arranged on the reduction gearbox shell and used for fixing the turboprop engine to a machine body, and can bear axial, radial and circumferential loads during working of the engine. The lubricating oil pump set is arranged to be communicated with a bearing lubricating cavity of a high-speed bearing on a main shaft of the turboprop engine and an inner cavity of the reduction gearbox shell, so that lubricating oil in the inner cavity of the reduction gearbox shell forms a lubricating oil circulating closed loop between the two cavities, the high-speed bearing is lubricated, and on the basis that the overall dimension of the turboprop engine is not increased, the problem of failure caused by insufficient lubrication of the high-speed bearing is solved.

Description

technical field [0001] The invention relates to the field of turboprop engines, in particular to a turboprop engine reduction box unit. Background technique [0002] Industrial-grade civilian drones are mainly used in many fields such as agriculture, forestry, plant protection, logistics, security and patrolling. There are two types of engines installed on the drones, namely piston engines and turboprop engines. The radial dimension of the piston engine is large, the axial dimension is short, and the power-to-weight ratio is about 1, which will affect the aerodynamic design and comprehensive performance of the UAV. The radial size of the turboprop engine is small, the axial size is long, and the power-to-weight ratio is about 3-4, which is conducive to the improvement of the aerodynamic design and comprehensive performance of the UAV. Therefore, UAVs are usually equipped with turboprop engines. [0003] There is a high-speed bearing installed on the main shaft of the turbo...

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Problems solved by technology

[0005] In order to solve the above problems, in the prior art, a lubrication system is generally added outside the turboprop engine, through which lubricating oil is provided for the high-speed bearings, so that the high-speed bearings on the main shaft of the turboprop engine can be lubricated by the lubricating oil. Adding a lubricating oil system on the outside of the engine will increase the radial size of the turboprop engine. The turboprop engine with this structure is very unfavorable for the optimization of the aerodynamic design and the improvement of the overall performance of the aircraft.

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