A power plant and aircraft

Abstract

The application belongs to the technical field of electric machines, and particularly relates to a power device and an aircraft. The power device comprises a first electric machine, a second electric machine and a flow guide cylinder. The first electric machine and the second electric machine are connected in series. The flow guide cylinder comprises a rotating cylinder body connected with the first electric machine and provided with a first air outlet, and a fixed cylinder body coaxially installed with the rotating cylinder body and provided with a second air outlet. The rotating cylinder body is provided with a first installation space communicating with the first air outlet, and the first electric machine is installed in the first installation space. The fixed cylinder body is provided with a second installation space communicating with the second air outlet, and the second electric machine is installed in the second installation space. The rotating cylinder body is provided with a first air inlet channel communicating with the first installation space, and a second air inlet channel communicating with the second installation space. In the application, the first electric machine and the second electric machine both have good heat dissipation effect, the heat dissipation efficiency of the power device is improved, and the service life of the power device is prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electric machines, and particularly relates to a power device and an aircraft. BACKGROUND

[0002] As a commonly used power device, an electric machine is applied in various fields. The electric machine converts electric energy into kinetic energy in the mode of electromagnetic induction, and heat is generated in the process of energy conversion. If the heat generated by the electric machine in the working process is not dissipated in time, the normal work of the electric machine will be affected. For example, for a ducted fan engine, the rotating speed of the fan blade driven by the electric machine inside the ducted fan engine is relatively fast, so the heat generated by the electric machine is relatively large, and thus the heat dissipation requirement of the electric machine is higher.

[0003] In the prior art, the ducted fan engine is also provided with a cooling air duct, but the cooling effect of the air in the cooling air duct on the electric machine is poor. SUMMARY

[0004] The technical problem to be solved by the application is the poor cooling effect of the electric machine in the ducted fan engine, and the application provides a power device and an aircraft.

[0005] To solve the above problems, the embodiment of the application provides a power device, which comprises a first electric machine, a second electric machine and a flow guide cylinder, the first electric machine and the second electric machine are connected in series, the flow guide cylinder comprises a rotating cylinder body connected with the first electric machine and provided with a first air outlet, and a fixed cylinder body coaxially installed with the rotating cylinder body and provided with a second air outlet;

[0006] The rotating cylinder body is provided with a first installation space communicating with the first air outlet, and the first electric machine is installed in the first installation space; the fixed cylinder body is provided with a second installation space communicating with the second air outlet, and the second electric machine is installed in the second installation space;

[0007] The rotating cylinder body is provided with a first air inlet channel communicating with the first installation space, and a second air inlet channel communicating with the second installation space.

[0008] Optionally, the rotating cylinder body comprises a rotating outer cylinder provided with the first installation space and an annular air duct cylinder installed on the inner wall of the rotating outer cylinder, the first air outlet is arranged on the side wall of the rotating outer cylinder, and the first electric machine is connected with the rotating outer cylinder through the annular air duct cylinder; the first air inlet channel comprises a first air inlet hole arranged at one end of the rotating cylinder body away from the fixed cylinder body, and a first through hole arranged in the annular air duct cylinder; the annular air duct cylinder is provided with a first side hole on the side wall, and the first installation space communicates with the first air outlet through the first side hole.

[0009] Optionally, the second air inlet channel comprises a second air inlet hole arranged at one end of the rotating outer cylinder away from the fixed cylinder body, and a second through hole arranged on the annular air duct cylinder; the second air inlet hole is communicated with the second installation space through the second through hole.

[0010] Optionally, the flow guide cylinder further comprises a fan and a fairing provided with a first air inlet, the fairing is arranged at one end of the rotating cylinder body away from the fixed cylinder body, and an accommodation space is formed between the fairing and the rotating cylinder body, which is communicated with the first air inlet, the first air inlet hole and the second air inlet hole; the fan is arranged at one end of the rotating cylinder body away from the fixed cylinder body, and the fan is located in the accommodation space.

[0011] Optionally, the power device further comprises a first baffle disc provided with a third through hole and abutting against the rotating cylinder body, and a second baffle disc provided with a fourth through hole and abutting against the fixed cylinder body, the first baffle disc and the second baffle disc are arranged between the rotating cylinder body and the fixed cylinder body, and a transition space is formed between the first baffle disc and the second baffle disc; one end of the second through hole away from the second air inlet hole is sequentially communicated with the second installation space through the third through hole, the transition space and the fourth through hole.

[0012] Optionally, the central axis of the second through hole and the central axis of the first motor are arranged at a preset inclination angle.

[0013] Optionally, the first motor comprises a first housing, a first stator and a first rotor sleeved on the first stator and connected to the first housing; the first housing is provided with a first internal space, a first motor air inlet hole and a first motor air outlet hole, the first housing is arranged in the first installation space, the first stator and the first rotor are arranged in the first internal space; the first installation space is communicated with the first internal space through the first motor air inlet hole, and the first internal space is communicated with the first installation space through the first motor air outlet hole.

[0014] The second motor comprises a second housing, a second stator and a second rotor sleeved on the second stator and connected to the second housing; the second housing is provided with a second internal space, a second motor air inlet hole and a second motor air outlet hole, the second housing is arranged in the second installation space, the second stator and the second rotor are arranged in the second internal space; the second motor air inlet hole is communicated between the second internal space and the second installation space, and the second motor air outlet hole is communicated between the second internal space and the second installation space.

[0015] The second rotor is connected to the first rotor, and the first housing is connected to the rotating cylinder body.

[0016] Optionally, the first shell comprises a first upper cover, a first sleeve and a first bottom cover, the first upper cover and the first bottom cover are installed at opposite ends of the first sleeve, the first internal space is surrounded by the first upper cover, the first sleeve and the first bottom cover, the first motor air inlet is arranged on the first upper cover, and the first motor air outlet is arranged on the first bottom cover.

[0017] The second shell comprises a second upper cover, a second sleeve and a second bottom cover, the second upper cover and the second bottom cover are installed at opposite ends of the second sleeve, the second internal space is surrounded by the second upper cover, the second sleeve and the second bottom cover, the second motor air inlet is arranged on the second upper cover, and the second motor air outlet is arranged on the second bottom cover.

[0018] Optionally, the flow guide cylinder further comprises a tail cylinder body provided with an inner hole, the tail cylinder body is installed at one end of the fixed cylinder body away from the rotating cylinder body, and a second air inlet is arranged on the side wall of the tail cylinder body and communicates with the second mounting space through the inner hole.

[0019] Optionally, the power device further comprises a third baffle disc provided with a fifth through hole, the third baffle disc is installed between the fixed sleeve and the tail sleeve, and the inner hole communicates with the second mounting space through the fifth through hole.

[0020] Optionally, the power device further comprises a moving blade, a stationary blade and a duct cylinder provided with a duct space, the stationary blade is connected between the inner wall of the duct space and the outer wall of the fixed cylinder body, and the moving blade is installed on the rotating cylinder body.

[0021] The application further provides a flying vehicle, which comprises a flying body and the above-mentioned power device, and the power device is installed on the flying body.

[0022] In the application, the first motor and the second motor jointly drive the fan to rotate, air at the front end of the flow guide cylinder enters the first installation space (i.e. the first through hole) through the first air inlet, and the air can cool the first motor in the first installation space, and the cooled air flows out from the first air outlet under the centrifugal force of the first motor after passing through the first side hole; air at the front end of the flow guide body also enters the second installation space through the second air inlet, and the air can cool the second motor in the second installation space, and the cooled air flows out from the second air outlet under the centrifugal force of the second motor. In the application, the first motor and the second motor are connected in series to jointly drive the fan to rotate, which improves the output torque of the first motor and the second motor and reduces the size of the flow guide cylinder; and the first motor and the second motor both have good heat dissipation effect, which improves the heat dissipation efficiency of the power device and prolongs the service life of the power device. BRIEF DESCRIPTION OF DRAWINGS

[0023] The application will be further described below in combination with the drawings and examples.

[0024] Figure 1 A cross-sectional view of a power device provided by an embodiment of the application;

[0025] Figure 2 A partial cross-sectional view of a power device provided by an embodiment of the application;

[0026] Figure 3 A partial structure schematic view of a power device provided by an embodiment of the application;

[0027] Figure 4 An exploded structure schematic view of a first motor of a power device provided by an embodiment of the application;

[0028] Figure 5 A cross-sectional view of a first motor part of a power device provided by an embodiment of the application;

[0029] Figure 6 A cross-sectional view of a second motor part of a power device provided by an embodiment of the application;

[0030] Figure 7 A structure schematic view of an annular air duct cylinder of a power device provided by an embodiment of the application;

[0031] Figure 8 A structure schematic view of a first baffle of a power device provided by an embodiment of the application;

[0032] Figure 9 A structure schematic view of a second baffle of a power device provided by an embodiment of the application;

[0033] Figure 10 Structure diagram of the third baffle of the power device provided by an embodiment of the present application.

[0034] The reference signs in the description are as follows:

[0035] 1, first motor; 11, first housing; 111, first upper cover; 112, first sleeve; 113, first bottom cover; 12, first stator; 13, first rotor; 2, second motor; 21, second housing; 22, second stator; 23, second rotor; 3, flow guide cylinder; 31, rotating cylinder body; 311, rotating outer cylinder; 3111, first mounting space; 3112, first air outlet; 3113, first air inlet hole; 3114, second air inlet hole; 312, annular air duct cylinder; 3121, first through hole; 3122, second through hole; 3123, first side hole; 32, fixed cylinder body; 321, second mounting space; 322, second air outlet; 33, transition space; 34, tail cylinder body; 341, inner hole; 342, second air inlet hole; 4, fan; 5, fairing; 51, first air inlet hole; 6, first baffle disc; 61, third through hole; 7, second baffle disc; 71, fourth through hole; 8, third baffle disc; 81, fifth through hole; 9, moving blade; 101, stationary blade; 102, duct cylinder. DETAILED DESCRIPTION

[0036] In order to make the technical problems solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0037] It should be understood that the terms "upper", "lower", "left", "right", "front", "back", "middle" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] As Figures 1 to 3As shown, the power device provided by the embodiment of the present application comprises a first motor 1, a second motor 2 and a flow guide cylinder 3; the first motor 1 and the second motor 2 are connected in series, the flow guide cylinder 3 comprises a rotating cylinder body 31 connected with the first motor 1 and provided with a first air outlet 3112, and a fixed cylinder body 32 coaxially installed with the rotating cylinder body 31 and provided with a second air outlet 322; it can be understood that the first air outlet 3112 is arranged on the side wall of the rotating cylinder body 31, and the first air outlet 3112 can be arranged in plurality, and the plurality of first air outlets 3112 are arranged in annular interval on the side wall of the rotating cylinder body 31; the second air outlet 322 is arranged on the side wall of the fixed cylinder body 32, and the second air outlet 322 can be arranged in plurality, and the plurality of second air outlets 322 are arranged in annular interval on the side wall of the fixed cylinder body 32.

[0039] The rotating cylinder body 31 is provided with a first installation space 3111 communicating with the first air outlet 3112, and the first motor 1 is installed in the first installation space 3111; the fixed cylinder body 32 is provided with a second installation space 321 communicating with the second air outlet 322, and the second motor 2 is installed in the second installation space 321; it can be understood that the first motor 1 is connected with the rotating cylinder body 31 and drives the rotating cylinder body 31 to rotate.

[0040] The rotating cylinder body 31 is provided with a first air inlet channel communicating with the first installation space 3111, and a second air inlet channel communicating with the second installation space 321. It can be understood that the first air inlet channel can be arranged at the front end of the rotating cylinder body 31, and the second air inlet channel can be arranged on the rotating cylinder body 31 in the axial direction, and the second air inlet channel penetrates the rotating cylinder body 31 in the axial direction.

[0041] Specifically, the first motor 1 and the second motor 2 jointly drive the rotating cylinder 31 to rotate, air at the front end of the guide cylinder 3 enters the first installation space 3111 through the first air inlet channel, the air in the first installation space 3111 can cool the first motor 1, and the cooled air flows out from the first air outlet 3112 under the centrifugal force of the first motor 1; the air at the front end of the guide cylinder 3 also enters the second installation space 321 through the second air inlet channel, and the air in the second installation space 321 can cool the second motor 2, and the cooled air flows out through the second air outlet 322 under the centrifugal force of the second motor 2. In the application, the first motor 1 and the second motor 2 are connected in series to jointly drive the rotating cylinder 31 to rotate, which improves the output torque of the first motor 1 and the second motor 2 and reduces the size of the guide cylinder 3; and the first motor 1 and the second motor 2 both have good heat dissipation effect, which improves the heat dissipation efficiency of the power device and prolongs the service life of the power device.

[0042] In an embodiment, as shown in Figure 2 、 Figure 5 and Figure 7 , the rotating cylinder 31 includes a rotating outer cylinder 311 provided with the first installation space 3111 and an annular air duct cylinder 312 mounted on the inner wall of the rotating outer cylinder 311, the first air outlet 3112 is arranged on the side wall of the rotating outer cylinder 311, and the first motor 1 is connected to the rotating outer cylinder 311 through the annular air duct cylinder 312; the first air inlet channel includes a first air inlet hole 3113 arranged at one end of the rotating cylinder 31 away from the fixed cylinder 32 and a first through hole 3121 arranged in the annular air duct cylinder 312; the annular air duct cylinder 312 is provided with a first side hole 3123 on the side wall, and the first installation space 3111 is communicated with the first air outlet 3112 through the first side hole 3123. It can be understood that the annular air duct cylinder 312 is a hollow structure, the middle part of the annular air duct cylinder 312 is the first through hole 3121, and the first side hole 3123 communicates with the first through hole 3121; the first air inlet hole 3113 is arranged at the front end of the rotating outer cylinder 311, and the first air inlet hole 3113 can be arranged as multiple according to actual needs, and multiple first air inlet holes 3113 are arranged in an annular interval.

[0043] Specifically, the air at the front end of the flow guide cylinder 3 enters the first installation space 3111 (i.e., the first through hole 3121) through the first air inlet hole 3113. The air in the first installation space 3111 can cool the first motor 1. The cooled air flows out of the first air outlet 3112 under the centrifugal force of the first motor 1 through the first side hole 3123. In this embodiment, the flow guide cylinder 3 has a simple structure and low manufacturing cost.

[0044] In an embodiment, as shown in Figure 2 , Figure 6 and Figure 7 , the second air inlet channel includes a second air inlet hole 3114 arranged at one end of the rotating outer cylinder 311 away from the fixed cylinder body 32, and a second through hole 3122 arranged on the annular air duct cylinder 312; the second air inlet hole 3114 communicates with the second installation space 321 through the second through hole 3122. Understandably, the annular air duct cylinder 312 has a certain thickness, the second through hole 3122 is arranged on the annular air duct cylinder 312 in the axial direction, and the second through hole 3122 does not communicate with the first side hole 3123 and the first through hole 3121; the second air inlet hole 3114 is arranged at the front end of the rotating outer cylinder 311, and the second air inlet hole 3114 can be arranged as multiple according to actual needs, multiple second air inlet holes 3114 are arranged in a ring shape; further, a circle of the second air inlet hole 3114 is located inside a circle of the first air inlet hole 3113.

[0045] Specifically, the air at the front end of the flow guide cylinder 3 also enters the second installation space 321 through the second air inlet hole 3114. The air in the second installation space 321 can cool the second motor 2. The cooled air flows out of the second air outlet 322 under the centrifugal force of the second motor 2. In this embodiment, the flow guide cylinder 3 has a simple structure and low manufacturing cost.

[0046] As a preferred, as shown in Figure 7 , the center axis of the second through hole 3122 and the center axis of the first motor 1 are arranged at a preset inclined angle. Understandably, the second through hole 3122 is arranged in an inclined manner along the axial direction of the annular air duct cylinder 312. Specifically, the first motor 1 drives the rotating outer cylinder 311 and the rotating outer cylinder 311 to rotate synchronously. The air in the second through hole 3122 will flow obliquely in the second through hole 3122 due to the centrifugal force. The second through hole 3122 is designed as an inclined hole, which increases the flow rate of the air flowing into the second installation space 321 through the second through hole 3122, and further enhances the cooling efficiency of the second motor 2 in the second installation space 321.

[0047] In an embodiment, as shown in Figure 2 and Figure 3 The flow guide tube 3 further comprises a fan 4 and a fairing 5 provided with a first air inlet 51, the fairing 5 is installed at the end of the rotating cylinder 31 (i.e. the rotating outer cylinder 311) away from the fixed cylinder 32, and the fairing 5 and the rotating cylinder 31 form a containing space which communicates with the first air inlet 51, the first air inlet hole 3113 and the second air inlet hole 3114, the fan 4 is installed at the end of the rotating cylinder 31 (i.e. the rotating outer cylinder 311) away from the fixed cylinder 32, and the fan 4 is located in the containing space. Understandably, the fan 4 includes but is not limited to axial fan 4, centrifugal fan 4, etc., as preferred, the fan 4 is an axial fan 4; the fairing 5 is provided with the first air inlet 51, the fairing 5 is installed at the front end of the rotating cylinder 31, the first motor 1 and the second motor 2 jointly drive the fan 4 to rotate in the containing space through the rotating cylinder 31, so that the external air can enter the containing space through the first air inlet 51, and the air in the containing space enters the first air inlet hole 3113 and the second air inlet hole 3114. In this embodiment, the design of the fairing 5 improves the lift of the power device.

[0048] In an embodiment, as shown in Figure 2 , Figure 8 and Figure 9 The power device further comprises a first baffle plate 6 provided with a third through hole 61 and abutting against the rotating cylinder 31, and a second baffle plate 7 provided with a fourth through hole 71 and abutting against the fixed cylinder 32, the first baffle plate 6 and the second baffle plate 7 are installed between the rotating cylinder 31 and the fixed cylinder 32, and a transition space 33 is formed between the first baffle plate 6 and the second baffle plate 7; the second through hole 3122 communicates with the second installation space 321 through the third through hole 61, the transition space 33 and the fourth through hole 71 in sequence away from the second air inlet hole 3114. Understandably, the first baffle plate 6 is fixedly connected to the inner wall of the first installation space 3111, the second baffle plate 7 is fixedly installed on the inner wall of the second installation space 321, and the first baffle plate 6 can block the first installation space 3111, that is, the first baffle plate 6 can prevent the air in the first installation space 3111 from flowing into the transition space 33.

[0049] Specifically, the air at the front end of the guide cone 3 enters the transition space 33 through the second through hole 3122 and the third through hole 61 in turn. Since the air pressure in the transition space 33 is smaller and the air pressure in the second mounting space 321 is larger, the air in the transition space 33 enters the second mounting space 321 through the fourth through hole 71. In this embodiment, the previous air entering the second mounting space 321 can be buffered in the transition space 33, ensuring the stability of the air entering the second mounting space 321 and avoiding damage to the second motor 2 caused by the air directly flowing into the second mounting space 321.

[0050] In an embodiment, as shown in Figure 5 The first motor 1 includes a first housing 11, a first stator 12, and a first rotor 13 sleeved on the first stator 12 and connected to the first housing 11. The first housing 11 is provided with a first internal space, a first motor air inlet, and a first motor air outlet. The first housing 11 is installed in the first mounting space 3111. The first stator 12 and the first rotor 13 are both installed in the first internal space. The first mounting space 3111 is connected to the first internal space through the first motor air inlet, and the first internal space is connected to the first mounting space 3111 through the first motor air outlet. Understandably, the first motor air inlet is arranged at the front end of the first housing 11, and the first motor air outlet is arranged on the side wall of the first housing 11. Both the first motor air inlet and the first motor air outlet can be provided with multiple ones according to actual needs. After the first motor 1 is powered on, the first housing 11 and the first rotor 13 rotate around the first stator 12, and the first rotor 13 is sleeved on the first stator 12.

[0051] Specifically, a part of air in the first installation space 3111 can play a cooling role on the first housing 11 (i.e., cooling the permanent magnet adhered to the inner surface of the first housing 11), a part of air in the first installation space 3111 enters the first internal space hole through the first motor air inlet hole, the air in the first internal space can play a cooling role on the first rotor 13 and the first stator 12, the cooled air enters the first installation space 3111 through the first motor air outlet, the air in the first installation space 3111 flows into the first installation space 3111 through the first motor air outlet hole, and the air in the first installation space 3111 flows out from the first air outlet 3112 through the first through hole 3121. In the embodiment, the first motor 1 is an external rotor motor, and the first motor 1 has the characteristics of low speed and large torque compared with an internal rotor motor. In addition, the first motor 1 has a good cooling effect, and the structure of the first motor 1 is compact and occupies a small space.

[0052] The second motor 2 comprises a second housing 21, a second stator 22, and a second rotor 23 sleeved on the second stator 22 and connected to the second housing 21; the second housing 21 is provided with a second internal space, a second motor air inlet hole and a second motor air outlet hole, and is installed in the second installation space 321; the second stator 22 and the second rotor 23 are both installed in the second internal space; the second motor air inlet hole is communicated between the second internal space and the second installation space 321, and the second motor air outlet hole is communicated between the second internal space and the second installation space 321; it can be understood that the second motor air inlet hole is arranged at the front end of the second housing 21, the second motor air outlet hole is arranged on the side wall of the second housing 21, and the second motor air inlet hole and the second motor air outlet hole can both be provided with multiple according to actual needs; after the second motor 2 is powered on, the second housing 21 and the second rotor 23 rotate around the second stator 22, and the second rotor 23 is sleeved on the second stator 22.

[0053] Specifically, a part of the air in the second installation space 321 can play a cooling role on the second housing 21 (i.e., cooling the permanent magnet adhered to the inner surface of the second housing 21), the air in the second installation space 321 enters the second internal space through the second motor air inlet, the air in the second internal space can play a cooling role on the second rotor 23 and the second stator 22, the cooled air enters the second installation space 321 through the second motor air outlet, and the air in the second installation space 321 flows out through the second air outlet 322. In the embodiment, the second motor 2 is an external rotor motor, which has the characteristics of low speed and large torque compared with an internal rotor motor. In addition, the second motor 2 has a good cooling effect, and the first motor 1 has a compact structure and occupies a small space.

[0054] The second rotor 23 is connected to the first rotor 13, and the first housing 11 is connected to the rotating cylinder 31. It can be understood that the second rotor 23 is connected to the first rotor 13 (or the second housing 21 is connected to the first housing 11), thereby realizing the series connection between the first motor 1 and the second motor 2. The first housing 11 can be connected to the inner wall of the rotating cylinder 31 through a flange, so that the first motor 1 and the second motor 2 can jointly drive the rotating cylinder 31 to rotate.

[0055] In an embodiment, as shown in Figure 4 The first housing 11 includes a first upper cover 111, a first sleeve 112, and a first bottom cover 113, the first upper cover 111 and the first bottom cover 113 are installed at opposite ends of the first sleeve 112; the first internal space is surrounded by the first upper cover 111, the first sleeve 112, and the first bottom cover 113, the first motor air inlet is arranged on the first upper cover 111, and the first motor air outlet is arranged on the first bottom cover 113; It can be understood that the first sleeve 112 can be covered with the first motor air outlet, the first upper cover 111 and the first bottom cover 113 are detachably connected to the first sleeve 112, so that the first motor 1 is simple to disassemble and assemble, thereby facilitating the maintenance of the first motor 1.

[0056] The second shell 21 comprises a second upper cover, a second sleeve and a second bottom cover, the second upper cover and the second bottom cover are installed at opposite ends of the second sleeve; the second internal space is surrounded by the second upper cover, the second sleeve and the second bottom cover, the second motor air inlet is arranged on the second upper cover, and the second motor air outlet is arranged on the second bottom cover. Understandably, the second sleeve can be covered with the second motor air outlet, and the second upper cover and the second bottom cover are detachably connected with the second sleeve, so that the second motor 2 is simple to disassemble and assemble, and then the second motor 2 is convenient to overhaul.

[0057] In an embodiment, as shown in Figure 2 The tail cylinder body 34 is installed at the rear end of the fixed cylinder body 32, the second air inlet 342 can be arranged in multiple numbers according to actual requirements, and the second air inlet 3114 can be designed as a long strip-shaped through hole, and a plurality of second air inlets 342 are arranged in a ring shape and at intervals on the side wall of the tail cylinder body 34.

[0058] Specifically, the air pressure on the circumferential outside of the tail cylinder body 34 is small, and the air pressure in the second installation space 321 and the inner hole 341 is large, so that the air on the outside of the tail cylinder body 34 can enter the second installation space 321 through the second air inlet 342 and the inner hole 341, so that the air in the second installation space 321 not only includes the air input from the front end through the first air inlet 3113 and the second through hole 3122, but also includes the air input from the rear end through the second air inlet 342 and the inner hole 341, so as to further improve the cooling effect of the second motor 2. Further, the end of the second shell 21 away from the first shell 11 is also provided with a third motor air inlet, and the air in the second installation space 321 can enter the second internal space of the second shell 21 through the third motor air inlet.

[0059] In an embodiment, as shown in Figure 2 And Figure 10As shown, the power device further comprises a third baffle disc 8 provided with a fifth through hole 81, the third baffle disc 8 is installed between the fixed cylinder body 32 and the tail cylinder body 34, and the inner hole 341 is communicated with the second installation space 321 through the fifth through hole 81. It can be understood that the third baffle disc 8 is fixedly installed on the inner wall of the fixed cylinder body 32, and the third baffle disc 8 is located at the rear end of the second motor 2. Specifically, the air in the inner hole 341 enters the second installation space 321 through the fifth through hole 81. In this embodiment, the design of the third baffle disc 8 reduces the complexity of manufacturing the power device.

[0060] In an embodiment, as shown in Figure 1 As shown, the power device further comprises a blade 9, a vane 101 and a duct cylinder 102 provided with a duct space, the vane 101 is connected between the inner wall of the duct space and the outer wall of the fixed cylinder body 32, and the blade 9 is installed on the rotating cylinder body 31. It can be understood that the blade 9 and the vane 101 are both provided with a plurality of, a plurality of the blade 9 is annularly and spacedly installed on the outer wall of the rotating cylinder body 31, and a plurality of the blade 9 is annularly and spacedly installed on the outer wall of the fixed cylinder body 32; the vane 101 can fix the flow guide cylinder 3 in the duct space. Specifically, the first motor 1 and the second motor 2 drive the blade 9 to rotate in the duct space through the rotating cylinder body 31, thereby providing power for the power device.

[0061] In an embodiment, as shown in Figure 2 As shown, the first air outlet 3112 is designed opposite to the suction surface of the blade 9. It can be understood that the rotation of the blade 9 makes the pressure of the first air outlet 3112 lower, so that the air output by the first installation hole through the first air outlet 3112 can be sucked away by the blade 9, thereby ensuring the stability of the air flow out of the first installation space 3111.

[0062] Another embodiment of the present application further provides a flying vehicle, comprising a flying body and the above-mentioned power device, and the power device is installed on the flying body. It can be understood that the flying vehicle includes but is not limited to an airplane, a drone and a flying toy, etc.

[0063] The above is only a preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power unit, characterized in that, It includes a first motor, a second motor, and a guide tube; the first motor and the second motor are connected in series, and the guide tube includes a rotating cylinder connected to the first motor and having a first air outlet, and a fixed cylinder coaxially mounted with the rotating cylinder and having a second air outlet; The rotating cylinder has a first mounting space connected to the first air outlet, and the first motor is installed in the first mounting space; the fixed cylinder has a second mounting space connected to the second air outlet, and the second motor is installed in the second mounting space. The rotating cylinder is provided with a first air inlet channel that connects to the first installation space and a second air inlet channel that connects to the second installation space.

2. The power unit according to claim 1, characterized in that, The rotating cylinder includes a rotating outer cylinder with the first mounting space and an annular air duct installed on the inner wall of the rotating outer cylinder. The first air outlet is located on the side wall of the rotating outer cylinder, and the first motor is connected to the rotating outer cylinder through the annular air duct. The first air inlet channel includes a first air inlet hole located at one end of the rotating cylinder away from the fixed cylinder and a first through hole located in the annular air duct. The side wall of the annular air duct is provided with a first side hole, and the first mounting space is connected to the first air outlet through the first side hole.

3. The power unit according to claim 2, characterized in that, The second air inlet channel includes a second air inlet hole disposed at one end of the rotating outer cylinder away from the fixed cylinder, and a second through hole disposed on the annular air duct cylinder; the second air inlet hole is connected to the second installation space through the second through hole.

4. The power unit according to claim 3, characterized in that, The guide tube also includes a fan and a shroud with a first air inlet. The shroud is installed at the end of the rotating cylinder away from the fixed cylinder, and the shroud and the rotating cylinder form a receiving space that connects the first air inlet, the first air inlet hole and the second air inlet hole. The fan is installed at the end of the rotating cylinder away from the fixed cylinder, and the fan is located in the receiving space.

5. The power unit according to claim 3, characterized in that, The power unit further includes a first baffle plate having a third through hole and abutting against the rotating cylinder, and a second baffle plate having a fourth through hole and abutting against the fixed cylinder. The first baffle plate and the second baffle plate are installed between the rotating cylinder and the fixed cylinder, and a transition space is formed between the first baffle plate and the second baffle plate. The end of the second through hole away from the second air inlet hole sequentially passes through the third through hole, the transition space and the fourth through hole to connect to the second installation space.

6. The power unit according to claim 3, characterized in that, The central axis of the second through hole is set at a preset tilt angle with the central axis of the first motor.

7. The power unit according to claim 1, characterized in that, The first motor includes a first housing, a first stator, and a first rotor sleeved on the first stator and connected to the first housing; the first housing is provided with a first internal space, a first motor air inlet and a first motor air outlet, the first housing is installed in the first installation space, and the first stator and the first rotor are both installed in the first internal space; The first installation space is connected to the first internal space through the first motor air inlet, and the first internal space is connected to the first installation space through the first motor air outlet. The second motor includes a second housing, a second stator, and a second rotor sleeved on the second stator and connected to the second housing; the second housing is provided with a second internal space, a second motor air inlet, and a second motor air outlet; the second housing is installed in the second mounting space, and the second stator and the second rotor are both installed in the second internal space. The second motor air inlet is connected between the second internal space and the second mounting space, and the second motor air outlet is connected between the second internal space and the second mounting space; The second rotor is connected to the first rotor, and the first housing is connected to the rotating cylinder.

8. The power unit according to claim 7, characterized in that, The first housing includes a first upper cover, a first sleeve, and a first bottom cover. The first upper cover and the first bottom cover are installed at opposite ends of the first sleeve. The first internal space is formed by the first upper cover, the first sleeve, and the first bottom cover. The first motor air inlet is located on the first upper cover, and the first motor air outlet is located on the first bottom cover. The second housing includes a second upper cover, a second sleeve, and a second bottom cover. The second upper cover and the second bottom cover are installed at opposite ends of the second sleeve. The second internal space is formed by the second upper cover, the second sleeve, and the second bottom cover. The second motor air inlet is located on the second upper cover, and the second motor air outlet is located on the second bottom cover.

9. The power unit according to claim 1, characterized in that, The guide tube also includes a tail section with an inner hole, which is installed at the end of the fixed tube away from the rotating tube; a second air inlet is provided on the side wall of the tail section, which is connected to the second installation space through the inner hole.

10. The power unit according to claim 9, characterized in that, The power unit also includes a third baffle with a fifth through hole, the third baffle being installed between the fixed cylinder and the tail cylinder, and the inner hole communicating with the second installation space through the fifth through hole.

11. The power unit according to claim 1, characterized in that, The power unit also includes a moving blade, a stationary blade, and a duct with a duct space. The stationary blade is connected between the inner wall of the duct space and the outer wall of the fixed cylinder, and the moving blade is mounted on the rotating cylinder.

12. An aircraft, characterized in that, It includes a flight body and a power unit as described in any one of claims 1 to 11, wherein the power unit is mounted on the flight body.

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