阅读说明：本技术 无人航空器巡航混合动力系统 (Cruise hybrid power system of unmanned aerial vehicle ) 是由 李志宁 赵欣欣 薛飞 姚振轩 董国威 窦大宾 冯力 吴倍宗 于 2021-08-11 设计创作，主要内容包括：本发明公开了无人航空器巡航混合动力系统,包括发动机、电动机及螺旋桨,电动机设置于发动机和螺旋桨之间,发动机的输出轴与螺旋桨的转轴之间通过一号单向轴承传动连接,电动机的转子与螺旋桨的转轴之间通过二号单向轴承传动连接,本发明适用于无人机动力系统技术领域,设置单向轴承和螺旋桨轴组成的双离合器结构,巧妙地创造两个动力输出到一个螺旋桨上的结构,解决了动力连接的难题,还设计电动机和发动机组合的混合动力系统,利用发动机和电动机的各自优点,互补不足,创造了一种全新的动力系统,最大化利用航空器有限重量分配份额,使得本案动力系统具备高能重比,高功重比的优异性能,广泛应用于航空器动力系统上。(The invention discloses an unmanned aerial vehicle cruise hybrid power system, which comprises an engine, a motor and a propeller, wherein the motor is arranged between the engine and the propeller, an output shaft of the engine is in transmission connection with a rotating shaft of the propeller through a one-way bearing, and a rotor of the motor is in transmission connection with the rotating shaft of the propeller through a two-way bearing. The high power-weight ratio has excellent performance, and is widely applied to aircraft power systems.)

1. Unmanned aerial vehicle hybrid system that cruises, characterized by, includes: engine (1), motor (2) and screw (3), motor (2) set up in engine (1) with between the screw (3), output shaft (4) of engine (1) with be connected through one-way bearing (7) transmission between pivot (6) of screw (3), rotor (5) of motor (2) with be connected through one-way bearing (8) transmission No. two between pivot (6) of screw (3).

2. The unmanned aircraft cruise hybrid system according to claim 1, wherein: the outer circle surface of the output shaft (4) of the engine (1) is in gapless contact connection with the inner needle roller of the one-way bearing (7), the outer side surface of the steel ring of the one-way bearing (7) is in interference fit connection with the inner circle surface of the rotating shaft (6) of the propeller (3), and the rotating action of the output shaft (4) of the engine (1) is transmitted to the rotating shaft (6) through the inherent one-way transmission action of the one-way bearing (7) to drive the propeller (3) to rotate.

3. The unmanned aircraft cruise hybrid system according to claim 2, wherein: under the condition that the rotating speed of the output shaft (4) is lower than that of the propeller (3) when the engine (1) stops running or runs, the output shaft (4) of the engine (1) is separated from the transmission to the rotating shaft (6) through the inherent one-way separation transmission function of the one-way bearing (7), and the propeller (3) is free to rotate in one way without being restricted by the engine (1).

4. The unmanned aircraft cruise hybrid system according to claim 3, wherein: the inner circular surface of the rotor (5) of the motor (2) is connected with the outer side surface of the steel ring of the second one-way bearing (8) in an interference fit mode, the inner needle roller of the second one-way bearing (8) is in gapless contact connection with the outer circular surface of the rotating shaft (6), and the rotating action of the rotor (5) of the motor (2) is transmitted to the rotating shaft (6) through the inherent one-way transmission action of the second one-way bearing (8) to drive the propeller (3) to rotate.

5. The unmanned aircraft cruise hybrid system according to any one of claims 1-4, wherein: when the motor (2) stops running or the rotating speed of the rotor (5) is lower than that of the propeller (3) during running, the rotor (5) of the motor (2) is separated from and transmitted to the rotating shaft (6) through the inherent one-way separation transmission function of the second one-way bearing (8), and the propeller (3) is free to rotate in one direction without being constrained by the motor (2).

6. The unmanned aircraft cruise hybrid system according to any one of claims 1-4, wherein: engine (1) and motor (2) all the stall condition, through the inherent one-way transmission effect that breaks away from of one-way bearing (7) and No. two one-way bearing (8), screw (3) do not receive engine (1) and motor (2) restraint one-way free rotation for unmanned aerial vehicle possess screw (3) feathering rotation and reduce the effect of glide flight resistance.

7. The unmanned aircraft cruise hybrid system according to any one of claims 1-4, wherein: hybrid power system operates engine work alone for the condition of unmanned aerial vehicle normal navigation includes: the engine (1) operates independently to drive the propeller (3) to rotate, so that the unmanned aerial vehicle flies without kinetic energy loss caused by additional resistance caused by the stop operation of the motor (2).

8. The unmanned aircraft cruise hybrid system according to any one of claims 1-4, wherein: hybrid power system operates motor work alone for the condition of unmanned aerial vehicle normal navigation includes: the motor (2) operates independently to drive the propeller (3) to rotate, so that the unmanned aerial vehicle flies without kinetic energy loss caused by additional resistance caused by the stop operation of the engine (1).

9. The unmanned aircraft cruise hybrid system according to any one of claims 1-4, wherein: hybrid power system double engine operation work for the condition of unmanned aerial vehicle high power navigation includes: the engine (1) and the motor (2) run simultaneously to drive the propeller (3) to rotate, so that the unmanned aerial vehicle flies.

Technical Field

The invention belongs to the technical field of unmanned aerial vehicle power systems, and particularly relates to an unmanned aerial vehicle cruise hybrid power system.

Background

The existing cruise power systems of the unmanned aerial vehicle at home and abroad are fuel engines and brushless motors. The fuel oil engine has various types, the working modes are turbojet and piston, most of the fuel oil is non-renewable petroleum products, the heat energy of the fuel oil is converted into useful mechanical energy through an engine to push an aircraft to fly, and the fuel oil engine is widely and efficiently used at present; brushless motors, as a new type of power system, tend to replace engine power, and the motor technology and the electronic governor technology of brushless motors are mature, and are widely applied to numerous electromechanical application fields except for the power system of an aircraft;

however, the cruise power systems carried by unmanned aerial vehicle systems used in the world are fuel engines, brushless motors and independent motors, and have the advantages and disadvantages of fuel engines, such as sufficient cruising ability of the engines, complex maintenance, inconvenient use, large-displacement engine power, high fuel consumption, small-displacement engine relative fuel consumption, serious power shortage, inherent power advantage of the motors, and limited cruising ability due to the limitation of energy storage batteries.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an unmanned aerial vehicle cruise hybrid power system.

In order to achieve the purpose, the invention adopts the following technical scheme:

the cruise hybrid power system of the unmanned aerial vehicle comprises an engine, an electric motor and a propeller, wherein the electric motor is arranged between the engine and the propeller, an output shaft of the engine is in transmission connection with a rotating shaft of the propeller through a first one-way bearing, and a rotor of the electric motor is in transmission connection with the rotating shaft of the propeller through a second one-way bearing.

Preferably, the outer circular surface of the output shaft of the engine is in gapless contact connection with the inner needle roller of the first one-way bearing, the outer side surface of the steel ring of the first one-way bearing is in interference fit connection with the inner circular surface of the rotating shaft of the propeller, and the rotating action of the output shaft of the engine is transmitted to the rotating shaft through the inherent one-way transmission action of the first one-way bearing to drive the propeller to rotate.

Preferably, when the engine stops running or runs and the rotating speed of the output shaft is lower than that of the propeller, the output shaft of the engine is separated from the rotating shaft through the inherent unidirectional separation transmission function of the first unidirectional bearing, and the propeller rotates freely in a unidirectional mode without being restrained by the engine.

Preferably, the inner circle surface of the rotor of the motor is in interference fit connection with the outer side surface of the steel ring of the second one-way bearing, the inner needle roller of the second one-way bearing is in gapless contact connection with the outer circle surface of the rotating shaft, and the rotation action of the rotor of the motor is transmitted to the rotating shaft through the inherent one-way transmission action of the second one-way bearing to drive the propeller to rotate.

Preferably, when the motor stops or the rotating speed of the rotor is lower than that of the propeller during operation, the rotor of the motor is disengaged from the rotating shaft through the inherent unidirectional disengaging transmission function of the second unidirectional bearing, and the propeller rotates freely in a unidirectional mode without being restrained by the motor.

Preferably, engine and motor all the stall condition, through the inherent one-way transmission effect that breaks away from of one-way bearing and No. two one-way bearings, the screw does not receive engine and motor restraint one-way free rotation for unmanned aerial vehicle has the effect that the screw feathers and rotates and reduce the flight resistance that glides.

Preferably, the hybrid power system operates the engine alone, so that the situation that the unmanned aerial vehicle normally sails includes: the engine operates alone to drive the propeller to rotate, so that the unmanned aerial vehicle flies without kinetic energy loss caused by additional resistance brought by the stop operation of the motor.

Preferably, the hybrid power system operates the motor alone, so that the situation that the unmanned aerial vehicle normally sails includes: the motor operates alone to drive the propeller to rotate, so that the unmanned aerial vehicle flies without kinetic energy loss caused by additional resistance brought by the stop operation of the engine.

Preferably, hybrid power system double-engine operation work for the condition of unmanned aerial vehicle high power navigation includes: the engine and the motor operate simultaneously to drive the propeller to rotate, so that the unmanned aerial vehicle flies.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

firstly, the double-clutch structure consisting of the one-way bearing and the propeller shaft is arranged, so that a structure that two powers are output to one propeller is ingeniously created, and the problem of power connection is solved.

Secondly, the invention designs a hybrid power system combining the motor and the engine, utilizes the advantages of the engine and the motor, overcomes the defects of complementation, creates a brand new power system, and maximizes the use of the limited weight distribution share of the aircraft, so that the power system has the excellent performances of high energy-to-weight ratio and high power-to-weight ratio and is widely applied to the power system of the aircraft.

Finally, compared with the existing fuel engine power system and the existing energy storage battery motor power system, the invention has the following advantages:

the hybrid power system has higher power output than a fuel engine power system under the same weight;

the hybrid power system has longer continuous power output time than the energy storage battery motor power system under the same weight;

the hybrid power system has two sets of power systems which can work independently and simultaneously, and has double safety performance compared with the existing fuel engine power system and the energy storage battery motor power system;

the power system with the same weight leads the engine to work in the best state in real time because the hybrid power system is provided with the intervention of a motor, and the consumed fuel oil amount is more saved than that of the power system of a fuel oil engine under the state of maximum power output;

because the hybrid power system transfers the redundant cruise kinetic energy consumption to the storage battery for storing electric energy, the hybrid power system saves the storage battery volume and weight more than an energy storage battery motor power system.

Drawings

FIG. 1 is a schematic overall configuration of the unmanned aircraft cruise hybrid system of the present invention;

FIG. 2 is a cross-sectional view of the unmanned aircraft cruise hybrid system of the present invention;

fig. 3 is a schematic diagram of power transmission in the unmanned aircraft cruise hybrid system of the present invention.

Reference numerals: 1. an engine; 2. an electric motor; 3. a propeller; 4. an output shaft; 5. a rotor; 6. a rotating shaft; 7. a first one-way bearing; 8. no. two one-way bearings.

Detailed Description

The following further describes an embodiment of the unmanned aerial vehicle cruise hybrid system according to the present invention with reference to fig. 1 to 3. The unmanned aircraft cruise hybrid system of the present invention is not limited to the description of the embodiments below.

Example 1:

the specific structure of the cruise hybrid system of the unmanned aircraft is provided in the embodiment, as shown in fig. 1-3, the cruise hybrid system comprises an engine 1, an electric motor 2 and a propeller 3, the electric motor 2 is arranged between the engine 1 and the propeller 3, an output shaft 4 of the engine 1 is in transmission connection with a rotating shaft 6 of the propeller 3 through a first one-way bearing 7, and a rotor 5 of the electric motor 2 is in transmission connection with the rotating shaft 6 of the propeller 3 through a second one-way bearing 8.

Specifically, the outer circular surface of the output shaft 4 of the engine 1 is in gapless contact connection with the inner needle roller of the first one-way bearing 7, the outer side surface of the steel ring of the first one-way bearing 7 is in interference fit connection with the inner circular surface of the rotating shaft 6 of the propeller 3, and the rotation action of the output shaft 4 of the engine 1 is transmitted to the rotating shaft 6 through the inherent one-way transmission action of the first one-way bearing 7 to drive the propeller 3 to rotate.

Further, when the engine 1 stops running or runs and the rotating speed of the output shaft 4 is lower than that of the propeller 3, the output shaft 4 of the engine 1 is disengaged from the rotating shaft 6 through the inherent unidirectional disengaging transmission function of the first unidirectional bearing 7, and the propeller 3 is free to rotate in a unidirectional mode without being restrained by the engine 1.

Specifically, the inner circular surface of the rotor 5 of the motor 2 is connected with the outer side surface of the steel ring of the second one-way bearing 8 in an interference fit manner, the inner needle roller of the second one-way bearing 8 is in gapless contact connection with the outer circular surface of the rotating shaft 6, and the rotation action of the rotor 5 of the motor 2 is transmitted to the rotating shaft 6 through the inherent one-way transmission action of the second one-way bearing 8 to drive the propeller 3 to rotate.

Further, when the motor 2 stops operating or the rotating speed of the rotor 5 is lower than that of the propeller 3 during operation, the rotor 5 of the motor 2 is disengaged from the rotating shaft 6 through the inherent unidirectional disengaging transmission function of the second unidirectional bearing 8, and the propeller 3 rotates freely in a unidirectional mode without being restrained by the motor 2.

Further, engine 1 and motor 2 all the stall condition, through the inherent one-way transmission effect that breaks away from of one-way bearing 7 and No. two one-way bearing 8, screw 3 does not receive engine 1 and the one-way free rotation of motor 2 restraint for unmanned aerial vehicle has the effect that screw 3 feathers and rotates and reduce the flight resistance that glides.

Furthermore, the hybrid power system operates the engine alone, so that the unmanned aerial vehicle can normally sail, including: the engine 1 operates alone to drive the propeller 3 to rotate, so that the unmanned aerial vehicle flies without kinetic energy loss caused by additional resistance caused by the stop operation of the motor 2.

Furthermore, hybrid power system operates the motor work alone for the unmanned aerial vehicle normal navigation's condition includes: the motor 2 operates alone to drive the propeller 3 to rotate, so that the unmanned aerial vehicle flies without kinetic energy loss caused by additional resistance caused by the stop operation of the engine 1.

Furthermore, the hybrid power system operates in a double-engine operation mode, so that the situation of high-power navigation of the unmanned aerial vehicle comprises the following steps: the engine 1 and the motor 2 operate simultaneously to drive the propeller 3 to rotate, so that the unmanned aerial vehicle flies.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.