Electric variable-pitch turboprop engine

Abstract

The invention relates to an electric variable-pitch turboprop engine. The variable-pitch propeller turboprop engine comprises a propeller, the propeller comprises a shell, blades and a variable pitchmechanism, the blades are rotationally assembled on the shell, each blade comprises a rotating disc, a vane and an eccentric driving lever, the vanes and the rotating discs are coaxial, a polygonal mounting cavity is formed among the rotating discs in the shell, and the variable pitch mechanism comprises a motor, a speed reducer, a shaft coupling, a lead screw and a driving disc, and further comprises a poking disc. The poking disc is installed on the lead screw through a lead screw nut, the lead screw is assembled on the shell in a rotating mode, the poking disc is in circumferential rotationstopping fit and axial sliding fit with the cavity wall of the polygonal mounting cavity through a rotation stopping face, the poking disc moves in the axial direction of the lead screw along with rotation of the lead screw, and U-shaped grooves are formed in the poking disc and correspond to the eccentric poking rods in a one-to-one mode. Each eccentric poking rod is inserted into the corresponding U-shaped groove, and when the poking disc moves along the axial direction of the lead screw, eccentric poking pins are pushed to rotate along the axis of the turntable through the U-shaped grooves. The engine has the advantages of quick response to change the blade angle, safety, stability and small size.

Description

technical field [0001] The present invention relates to electrically variable pitch turboprop engines. Background technique [0002] Turbine engine (Turbine engine, or often simply referred to as Turbine) is a form of engine that uses rotating parts to extract kinetic energy from fluid passing through it, and is a type of internal combustion engine. It is often used as an engine for aircraft and large ships or vehicles. [0003] According to fuel economy and actual use, it is divided into three structures: turbojet engine, turbofan engine and turboprop engine. [0004] The turbojet engine, referred to as the turbojet engine, is to directly eject the combusted gas and provide kinetic energy by the thrust of the ejected airflow. The advantage is that the high speed is particularly good, and the disadvantage is that the fuel economy is poor. Turbojet engines are mainly used in general fighter jets, bombers, drones, etc. [0005] Turbofan engine, referred to as turbofan engi...

AI Technical Summary

Problems solved by technology

[0008] (1) Due to insufficient actuation performance and large load inertia, it is impossible to quickly change the blade angle and match the torque required to maintain the propeller, which seriously affects the acceleration and deceleration performance of the propeller aircraft;

[0009] (2) Due to the need to provide high-pressure hydraulic oil to the high-speed propeller for a long time, the sealing ring used for dynamic sealing is prone to failure and oil leakage, resulting in the risk that the propeller cannot achieve pitch change;

[0010] (3) The high-speed dynamic seal cannot provide high hydraulic pressure. In order to achieve the required variable pitch force, the volume of the hydraulic variable pitch mechanism is very large

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