Bevel gear transmission torque self-balancing shaftless ducted fan or propeller blades for aircraft

Abstract

The invention provides a bevel-gear-transmission torque self-balancing shaftless ducted fan or propeller blades for an aircraft. The bevel-gear-transmission torque self-balancing shaftless ducted fancomprises a duct cylinder frame, at least one set of reverse shaftless fans or the shaftless propeller blades, and transmission mechanisms; the reverse shaftless fans or the shaftless propeller bladesand the transmission mechanisms are mounted in the duct cylinder frame; and the transmission mechanisms are connected with the reverse shaftless fans or the shaftless propeller blades through gears to form the shaftless ducted fan or the shaftless ducted propeller blades. According to the bevel-gear-transmission torque self-balancing shaftless ducted fan or propeller blades, the structure is simple, and mounting and using are convenient; and the bevel-gear-transmission torque self-balancing shaftless ducted fan or propeller blades are suitable for being used for the current aircraft which isapplied increasingly and widely, and especially suitable for a manned aircraft requiring low noise and high lift or thrust and having self-balancing torque.

Description

technical field [0001] The invention relates to the technical field of aircraft power, in particular to a self-balancing shaftless ducted fan or shaftless ducted blade for an aircraft with bevel gear transmission torque. Background technique [0002] Today, propellers or ducted fans have been widely used in various types of aircraft. In order to increase the lift of the blades or reduce noise, various forms of ducted fans or propellers have emerged as aircraft power designs. But because the known ducted fans or blades all work in the way that the central shaft drives the hub to drive the blades to rotate, the existing axial ducted fans or blades have the following disadvantages: one is that the existence of the hub occupies a large The air circulation space hinders the flow of air flow. In order to ensure that the fan has a sufficient flow area when it is working, it is usually designed to increase the outer diameter of the blade, but the increase in the outer diameter of th...

AI Technical Summary

Problems solved by technology

But because the known ducted fans or blades all work in the way that the central shaft drives the hub to drive the blades to rotate, the existing axial ducted fans or blades have the following disadvantages: one is that the existence of the hub occupies a large The air circulation space hinders the flow of air flow. In order to ensure that the fan has a sufficient flow area when it is working, it is usually designed to increase the outer diameter of the blade, but the increase in the outer diameter of the blade will increase the linear velocity of the blade tip, which will cause noise. increase, and the blade tip is easily deformed under aerodynamic action, resulting in a decrease in efficiency; second, boundary layer separation and secondary flow often exist at the connection between the traditional fan hub and the blade, which affects the energy conversion effect and reduces the efficiency of the blade. Work efficiency; third, in order to prevent the blade tip from rubbing against the ducted air duct, there is usually a gap between the two, that is, the blade tip gap. During operation, the high-pressure gas on the blade pressure surface will bypass the blade tip gap It flows into the suction surface of the blade, which not only produces flow leakage and volume loss, but also destroys the stability of the flow field, which ultimately leads to a decrease in the efficiency of the whole machine

In order to solve the above problems, scientists have carried out a lot of technological innovation and improvement, especially in the design of the fan, such as the application number 201710914763.0 Chinese patent application discloses a rack and pinion driven shaftless fan, the technical solution of which is adopted The motor drives the rack and pinion, and the rack and pinion drive the rotor parts with sliding friction to rotate from the rim. Although the central shaft and the hub are reduced, the mechanical design of the fan requires a separate lubrication device that is complicated and difficult to maintain. The relative installation position of the motor and the fan is inconvenient to use and has a large volume, and it cannot provide the aircraft with an automatically balanced torque. Although this technical solution provides a new solution for the design of the fan, it is only a shaftless fan technology. scheme, its structure and characteristics determine that it cannot be used as a ducted fan or blade of an aircraft

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