Multi-tooth transmission propeller

Abstract

A multi-tooth transmission propeller comprises a first propeller, a second propeller, a first bevel gear, a first transmission shaft and a transmission gear set. The first propeller is arranged at thetop of the first transmission shaft, the first bevel gear is arranged on the first transmission shaft below the first propeller through a bearing, and the second propeller is arranged on the first bevel gear; the transmission gear set is connected with the first transmission shaft and the first bevel gear, and the first propeller and the second propeller coaxially rotate reversely. Compared witha traditional coaxial contra-rotating propeller structure, the design that the herringbone gear and the helical gear are matched with each other is adopted, so that the stability of the propeller during high-speed operation can be effectively improved, the power level of the aircraft is improved, the advantages of the coaxial reverse structure are further improved by utilizing the characteristicsof high speed, good bearing performance, stable transmission and low noise of the herringbone gear, and meanwhile, the common problem that the noise of the coaxial reverse propeller is relatively large is also overcome.

Description

technical field [0001] The invention belongs to the technical field of turbo propellers, in particular to a multi-tooth transmission propeller. Background technique [0002] Contra-rotating propellers are a type of propeller unique to turboprop engines. The biggest difference between it and ordinary propellers is that there are two sets of propellers rotating side by side on a single engine. The angular velocity directions of these two sets of propellers are opposite, so they are called coaxial counter-rotating propellers. [0003] The two sets of propellers of coaxial counter-rotating propellers are usually connected to the same engine and use a set of planetary gears to achieve counter-rotation. Coaxial counter-rotating propellers are not counter-rotating propellers, which refer to two different engines on either side of the aircraft whose propellers turn in opposite directions. [0004] In the low-speed cruising state, the tip of the propeller blade will form a tangenti...

AI Technical Summary

Problems solved by technology

[0005] The biggest disadvantage of the coaxial counter-rotating propeller compared with the conventional propeller is that the noise generated by the operation is too large, and the increase of this noise is especially obvious when the blade rotates at a high speed

Another disadvantage is the added complexity of the engine design and the added weight

Due to the disadvantage of high noise, the coaxial counter-rotating propeller has not been used well on passenger planes, and can only be used on military planes

Another disadvantage of the coaxial counter-rotating propeller is that it increases the design complexity of the engine and increases the weight, so it has not been widely used on passenger aircraft.

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