Efficient power ducted fan

Abstract

The utility model discloses an efficient power ducted fan. The assembly comprises a duct main body, a rotor, a middle shaft, a shaft wall connecting rod and a side moment driving device. And the edge torque driving device generates edge torque to drive the rotor to rotate. The minimization of the input power is realized, and the energy consumption is reduced. The output power of the ducted fan is improved by using multiple rotors to do work. Consumption reduction and pressurization of the ducted fan are achieved, and the energy consumption ratio is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to a ducted fan aerodynamic device, in particular a high power efficiency ratio ducted fan. BACKGROUND

[0002] The performance index of the ducted fan engine is the power efficiency ratio, that is, how much energy is consumed to generate how much thrust. The larger the coefficient, the stronger the performance. Therefore, in the efficiency improvement technical solution, it can be to improve the output power under the condition of equal input power. It can also be to reduce the input power under the condition of equal output power. The best is to implement both solutions at the same time.

[0003] At present, the function structure of the turbofan engine is that the rear turbo engine drives the front ducted fan to rotate to generate thrust through shaft transmission. The structure of the electric ducted fan is to replace the turbine with an electric motor, which also drives the front ducted fan to rotate through shaft transmission. Both adopt shaft torque input method to drive the ducted fan to work. Therefore, this transmission method is called shaft distance drive. This driving method can be simply analyzed by the principle of lever. The transmission shaft is the fulcrum of the lever, and the radius of the turbine blade and the radius of the motor rotor are the power arm, and the radius of the ducted fan is the resistance arm.

[0004] The driving structure described above has a power arm smaller than the resistance arm, and the resistance is the combined force of friction and work. Therefore, the driving force needs to consume more than twice the resistance and more force to drive the fan to work, and the energy consumption is large. In theory, increasing the disc diameter of the turbine blade or increasing the diameter of the motor rotor can save turbine fuel and reduce motor power consumption. SUMMARY

[0005] In order to improve the power efficiency ratio of the power ducted fan and meet the requirement of consuming less energy to generate greater aerodynamic force, this application proposes a side torque input technical solution, which is different from the traditional shaft torque input to drive the blade of the ducted fan to rotate. The technical principle is: the power arm driving the fan to work is increased to be greater than the resistance arm, which conforms to the principle of using the largest force arm with the smallest force. This side torque is generated by the side moment driving device.

[0006] Based on the above technical principle, the technical scheme adopted in the case is: in the duct fan, the components include: duct main body, rotor, middle shaft, shaft wall connecting rod and side moment driving device. The rotor is composed of a blade ring, a blade group and a hub. The blade group is connected and fixed around the hub and is placed in the blade ring, so that the outer edge of the blade group is connected and fixed with the blade ring. The rotor is connected with the middle shaft through the hub to form free rotation, and the middle shaft is connected with the duct main body through the shaft wall connecting rod to form fixation, thereby forming a power output unit of the duct fan. The side moment driving device is composed of a power element and a force receiving element. The power element is fixed to the duct main body, and the force receiving element is fixed to the rotor blade ring. Mechanical kinetic energy is generated through energy conversion of the power element, and torque is generated on the force receiving element to drive the rotor to rotate, thereby forming a power input unit. The side torque input reduces the consumption, and the power arm is greater than the resistance arm according to the lever principle, so that smaller force is applied to effectively reduce the input power and reduce energy consumption.

[0007] The side moment driving device is an energy conversion mechanism. The technical means 1 is to use electric energy to generate torque. In the device, the power element is composed of an electromagnetic winding fixed to the duct main body, and the electromagnetic force generates a magnetic torque with the magnetic force receiving body fixed to the outer ring of the rotor to drive the rotor to rotate. The technical means 2 is to convert potential energy into kinetic energy. The side moment driving device converts high-pressure gas potential energy into mechanical kinetic energy. The power element is composed of a nozzle and a gas flow cover, and the force receiving element is composed of turbine blades fixed to the rotor blade ring. The turbine blades are driven by high-speed airflow to generate torque to drive the rotor to rotate.

[0008] In order to improve the power output of the duct fan, the application proposes a multi-rotor supercharging scheme. The technical means is that a plurality of rotors driven by the above-mentioned side force torque driving device rotate in opposite directions to improve the pressure in the duct cavity and realize the technical demand of improving the air power.

[0009] The beneficial effects of the technical scheme are that the side torque driving duct fan can greatly reduce the input power, save energy consumption, and the multi-rotor working effectively improves the output power and increases the air power of the duct fan. The aviation engine developed by the technical scheme can effectively improve the load and endurance time of the vertical take-off and landing aircraft, reduce the volume and improve the safety performance. BRIEF DESCRIPTION OF DRAWINGS

[0010] The application will be further described below in combination with the drawings and examples.

[0011] Figure 1 : Device structure schematic diagram.

[0012] Figure 2 : Magnetic side torque driving device structure schematic diagram.

[0013] Figure 3 : Turbine side distance driving device structure schematic diagram.

[0014] Figure 4 Structure of the turbine edge distance driving device A-A cross-sectional view.

[0015] Figure 1 In the figure: 1. Duct body, 2. Blade, 3. Hub, 4. Ring, 5. Middle shaft, 6. Shaft wall connecting rod, 7. Edge distance driving device.

[0016] Figure 2 In the figure: 8. Stator winding, 9. Rotor magnet.

[0017] Figure 3 In the figure: 10. Airflow nozzle, 11. Turbine blade, 12. Dispersing port. DETAILED DESCRIPTION

[0018] Figure 1 In the device, the fan is called the rotor, which is connected and fixed by a plurality of blades (2) around the hub (3) to form a blade group, and the blade group is sleeved into the ring (3) to connect and fix the outer end of the blade group with the annular ring, thereby constituting the rotor. In the device, the rotor is connected with the middle shaft (5) through the hub (2) and forms a free rotation, and the middle shaft (5) is connected with the duct body (1) through the shaft wall connecting rod (6) to form a fixation. The edge distance driving device (7) is an energy conversion mechanism, which generates mechanical force directly acting on the rotor ring to constitute the edge torque directly driving the rotation of the rotor. It is composed of a power element and a force receiving element, and the power element is fixed on the duct body, and the force receiving element is fixed on the rotor ring.

[0019] Figure 2 In the device, the technical means 1 for generating the edge torque is that the edge distance driving device converts electric energy into kinetic energy, uses the principle of electric motor to generate magnetic torque. In the device, the stator winding (8) is the power element, which is fixed on the duct body to generate electromagnetic. The permanent magnet or magnetic induction body (9) is the force receiving element, which is fixed on the periphery of the rotor ring.

[0020] Figure 3 In the device, the technical means 2 for generating the edge torque is that the edge distance driving device converts potential energy into kinetic energy, and the high-speed gas generated from the outside acts on the turbine blade to generate torque. In the device, the nozzle is the power element (10) fixed on the duct body, and the turbine blade (11) is the force receiving element fixed on the periphery of the ring. The high-speed gas is sprayed out from the nozzle (10), passes through the turbine blade (11), and is discharged from the dispersing port (12). Figure 4 For further illustration by cross-sectional view.

[0021] Figure 1 In order to improve the pressure in the duct cavity and increase the air power generated by the duct fan device, with the same technical means, multiple rotors are increased to work, so as to increase the air pressure in the unit volume and realize the technical demand of improving the power output.

[0022] According to the technical scheme, in the actual development of the power engine, two modes of power engines can be developed, one is an air injection engine with a small air dynamic section and a large power density, mainly applied to aircraft propulsion and vertical take-off and landing aircraft with built-in engines, and the other is a rotor engine with a large air dynamic section and a small power density, mainly applied to providing lifting power for large load aircraft.

Claims

1. A high-bypass propulsive ducted fan characterized by: The components of the ducted fan include a duct main body, a rotor, a middle shaft, a shaft wall connecting rod and a side moment driving device. The rotor is composed of a blade ring, a blade set and a hub. The blade set is connected and fixed around the hub and is placed in the blade ring, so that the outer edge of the blade set is connected and fixed with the blade ring. The rotor is connected with the middle shaft through the hub to form free rotation, and the middle shaft is connected with the duct main body through the shaft wall connecting rod to form fixation, thereby forming a power output unit of the ducted fan. The side moment driving device is composed of a power element and a force receiving element. The power element is fixed to the duct main body, and the force receiving element is fixed to the rotor blade ring.

2. The high efficiency power ducted fan of claim 1, wherein: The side moment driving device adopts electric energy to convert into mechanical kinetic energy. The power element is composed of an electromagnetic winding to generate electromagnetic force, and a magnetic force moment is formed with a magnetic force receiving body fixed to the outer ring of the rotor to drive the rotor to rotate.

3. The high-efficiency power ducted fan according to claim 1, characterized in that: The side moment driving device adopts high-pressure gas potential to convert into mechanical kinetic energy. The power element is composed of a nozzle and a gas flow cover. The force receiving element is composed of turbine blades fixed to the rotor blade ring. The turbine blades are driven to rotate by the moment generated by high-speed airflow.

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