Coaxial double-rotor helicopter transmission device with bevel gear branching

Abstract

The invention discloses a coaxial double-rotor helicopter transmission device with bevel gear branching, and relates to the field of coaxial double-rotor helicopter transmission system configuration.The coaxial double-rotor helicopter transmission device with the bevel gear branching has very important significance for a high-power high-speed transmission system. According to the technical scheme, the coaxial double-rotor helicopter transmission device with the bevel gear branching comprises an output unit and at least one power input shunting unit, wherein the output unit comprises an innerrotor shaft 27 and an outer rotor shaft 28; and the power input shunting unit comprises an input shaft 1, a first gear shaft 4, a second gear shaft 9, a third gear shaft 10, a fourth gear shaft 17 anda sixth gear shaft 19. The transmission system configuration can be widely applied to the fields of medium and heavy helicopter transmission systems, ship transmission systems and the like. The sizeand weight of the whole transmission system can be effectively reduced, and the stability and reliability of the system are improved.

Description

technical field [0001] The present invention relates to the configuration field of coaxial double-rotor helicopter transmission system, in particular to a coaxial double-rotor helicopter transmission device with bevel gear branching, which is a kind of transmission device which utilizes bevel gear branching to complete commutation and deceleration to realize coaxial Reversed coaxial twin-rotor helicopter main reducer transmission configuration. Background technique [0002] The helicopter transmission system, together with the engine and the rotor system, are called the three key moving parts of the helicopter. Its function is to transmit the output power and output speed of the engine to the rotor, tail rotor and various accessories in a certain proportion. The transmission system of the coaxial twin-rotor helicopter is more complicated than that of the single-rotor helicopter, because one engine of the coaxial twin-rotor helicopter must simultaneously drive the upper and l...

AI Technical Summary

Problems solved by technology

However, due to the structural strength and efficiency of the planetary gear transmission, its transmission is relatively small; at the same time, the planetary gear has both revolution and rotation, so the structure is complicated, and the working conditions of the supporting bearing are complicated, the bearing is easily damaged, and the seal is poor. The moving planetary gear train is difficult to match the teeth, the structure is more complex, the manufacturing precision is high, and the manufacturing and installation are more difficult

[0004] In this regard, the State Intellectual Property Office announced on May 3, 2019 a Chinese invention patent titled "Coaxial double-rotor transmission with two power splits between bevel gear and cylindrical gear" with the application number "201910011019.9" , in this case, two bevel gears with the same axis are meshed by one input bevel gear at the same time, so as to realize two-way transmission and power splitting; A large space is left in the axial direction of the two power output shafts to facilitate the arrangement of the input bevel gears; thus, the transmission device is large in size and complex in design and layout.

[0005] In addition, this type of transmission device also has extremely high requirements for the structural stability of the power input shaft, and it is necessary to provide more support points for the power input shaft, which further increases the difficulty and complexity of the design layout, making the overall transmission device Difficult to reduce in size

[0006] At the same time, this type of transmission is a bevel gear meshing with two bevel gears at the same time, and the upper and lower gears are both bevel gears (usually installed vertically at 90°). It must be repeatedly disassembled and adjusted to achieve the best meshing state. Therefore, a large number of tooling and fixtures and measuring tools must be used for auxiliary cooperation. This will undoubtedly increase the workload and difficulty of gear assembly, and reduce the installation efficiency. Otherwise, the gear will be eccentric or meshed. Bad and premature damage

This puts high demands on the manufacture and installation of bevel gears, especially in aeronautical structures, where high-precision manufacturing and installation standards are required, such a structure is difficult to achieve

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