A power device and a mounting method

Abstract

This application provides a power unit, comprising: a first housing located on the outermost side of an aircraft, with an inner wall that is a flat, annular surface; a second housing coaxially arranged with the first housing and fixedly connected to it; a first mounting bracket located between the first and second housings, having a mounting groove for accommodating a magnetic component; a second mounting bracket located on the outer wall of the second housing, having a frame for placing a coil winding; a coil winding; a magnetic component; and fan blades extending from the inner side of the second housing through the first and second mounting brackets to the area between the first and second housings. A method for installing the power unit is also provided. Integrated fan blades are arranged inside and outside the power unit, forming corresponding ducts through the first and second housings. Electromagnetic effects drive the inner and outer fan blades to rotate synchronously with high efficiency, generating high-speed airflow within both ducts to provide thrust for the aircraft's vertical takeoff and normal flight.

Description

Technical Field

[0001] This application relates to the field of electric motor technology, and more specifically, to a power device and its installation method. Background Technology

[0002] Traditional motors use an inner stator and an outer rotor arrangement, with the external fan blades connected through the power unit casing. When used in ducted motor aircraft, traditional motors cannot achieve high wind utilization efficiency of the external fan blades at a certain speed. For example, since the traditional fan blades are indirectly connected to the rotor through the motor casing, the power transmission efficiency is low (≤60%), and the duct involved is only a single channel, resulting in low airflow utilization. Therefore, the flight capability of ducted motor aircraft is limited, and it is impossible to achieve rapid vertical takeoff and normal flight. Summary of the Invention

[0003] This application aims to at least partially solve the above-mentioned technical problems and provide a power unit and installation method that can improve the utilization efficiency of wind at a certain speed and provide stronger power for ducted aircraft.

[0004] This application provides a power device, including:

[0005] The first hull is located on the outermost side of the aircraft, and its inner wall is a flat, annular surface with an inner diameter of R1.

[0006] The second housing is coaxially arranged with the first housing, and has an inner diameter of R2, wherein R2 ≥ 0.25R1. The second housing is fixedly connected to the first housing.

[0007] The first mounting bracket is located between the first housing and the second housing, and is provided with a mounting groove for accommodating magnetic components;

[0008] The second mounting bracket is located on the outer wall of the second housing and has a frame for placing the coil windings.

[0009] The coil winding is located inside the frame body;

[0010] A magnetic component is disposed inside the mounting groove;

[0011] The fan blade extends from the inside of the second housing through the first mounting bracket and below the second mounting bracket to the area between the first housing and the second housing;

[0012] The bearing assembly is located below the second mounting bracket, with its first end connected to the second housing and its second end connected to the fan blade.

[0013] Furthermore, the bearing assembly includes an inner ring, an outer ring, and a connecting frame connected to the outer ring. The connecting frame is horizontally positioned above the inner ring and the outer ring along the axial direction. The connecting frame and the inner ring and the outer ring have a first distance D1 in the vertical direction, wherein 0.5mm≤D1≤1mm.

[0014] Furthermore, the inner and outer rings of the bearing assembly and the fan blades have a second distance D2 in the vertical direction, wherein 0.5mm≤D2≤1mm.

[0015] Furthermore, there is a third horizontal distance D3 between the fan blade and the second housing, wherein D3 ≥ 0.5 mm.

[0016] Furthermore, the horizontal plane at the bottom of the second housing is higher than the horizontal plane at the bottom of the first housing, and the two have a fourth vertical distance of D4. The vertical distance from the top of the first housing to its lower edge is the height H1 of the first housing, where D4≤0.75H1.

[0017] Furthermore, the height of the fan blade is H2, wherein 0.5H1≤H2≤0.75H1.

[0018] Furthermore, the upper part of the fan blade is provided with a clearance portion, and the first mounting bracket and bearing assembly are at least partially located inside the clearance portion.

[0019] Furthermore, the inner wall of the clearance portion of the fan blade is fixedly connected to the outer wall of the first mounting bracket.

[0020] Furthermore, the inner ring radius of the bearing assembly is R3, and the inner diameter of the second housing is R2, wherein R3 < R2.

[0021] This application also provides an installation method for installing the aforementioned power device, comprising:

[0022] The bearing assembly is mounted on the outside of the second housing;

[0023] A second mounting bracket, which is configured with coil windings, is mounted on the outside of the second housing and located above the bearing assembly;

[0024] The fan blades are installed on the inner wall of the inner ring of the bearing assembly;

[0025] The first housing and the second housing are fixedly connected at the top by a fixing bracket;

[0026] A first mounting bracket equipped with magnetic components is installed on the outside of the second mounting bracket and the bearing assembly, and its bottom end is fixedly connected to the fan blade.

[0027] Check for any interference.

[0028] This application provides a power unit with integrated fan blades inside and outside the power unit, and corresponding ducts formed by a first housing and a second housing. The inner and outer fan blades are driven to rotate synchronously with high efficiency through electromagnetic effect, and high-speed airflow is generated in both ducts to provide thrust for vertical take-off and normal flight of the aircraft. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure of the power unit in this embodiment;

[0031] Figure 2 for Figure 1 Schematic diagram of the AA section of the power unit;

[0032] Figure 3 This is a schematic diagram of the power unit without the first outer casing in this embodiment;

[0033] Figure 4 This is a schematic diagram of the fan blade structure in this embodiment.

[0034] Figure label:

[0035] 10-First housing, 11-Second housing, 12-First mounting bracket, 13-Second mounting bracket, 14-Magnetic component, 15-Fan blade, 16-Bearing assembly, 161-Connecting bracket, 162-Outer ring, 163-Inner ring, 17-Limiting protrusion, 18-Allowing part, 19-Frame, 20-Mounting groove. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] like Figure 1 , Figure 2 and Figure 3As shown in the figure, this application provides a power device, which includes a first housing 10, a second housing 11, a first mounting bracket 12, a second mounting bracket 13, a coil winding (not shown), a magnetic component 14, a fan blade 15, and a bearing assembly 16. The above components constitute the basic structure of the power device. The specific structure of each component and the connection relationship between them will be described below.

[0038] In this embodiment, the first housing 10 is the outermost structure of the power device, and its inner wall is a flat, annular surface, which helps the airflow to flow inside it.

[0039] The second housing 11 is disposed inside the first housing 10 and is coaxially disposed with the first housing 10. The second housing 11 is connected to the first housing 10 by a fixing bracket (not shown) to form the basic support structure of the power device.

[0040] The first mounting bracket 12 is disposed between the first housing 10 and the second housing 11, and has a mounting groove 20 for accommodating the magnetic component 14, the magnetic component 14 being embedded inside the mounting groove 20.

[0041] The second mounting bracket 13 is disposed on the outer wall of the second housing 11, and it is provided with a frame 19 for placing the coil winding, the coil winding being sleeved on the frame 19; in addition, a limiting groove is provided on the inner side of the second mounting bracket 13, and a limiting protrusion 17 is provided on the second housing 11, the limiting protrusion 17 being adapted to the limiting groove to fix the second housing 11 and the second mounting bracket 13.

[0042] The mounting slot 20 on the first mounting bracket 12 and the frame 19 on the second mounting bracket 13 are in an inner and outer corresponding state, so that the magnetic component 14 is adapted to the coil winding, that is, in the vertical direction, the center lines of the two are on the same horizontal plane.

[0043] The bearing assembly 16 is located below the second mounting bracket 13, with its first end connected to the second housing 11 and its second end connected to the fan blade 15; specifically, the inner ring 163 and outer ring 162 of the bearing assembly 16 and the fan blade 15 have a second distance D2 in the vertical direction.

[0044] Wherein, 0.5mm≤D2≤1mm; if D2<0.5mm, the fan blade 15 will interfere with the inner ring 163 and outer ring 162 in the bearing assembly 16 during rotation, and cannot maintain stable rotation; if D2>1mm, the space of the clearance part 18 on the fan blade 15 will be wasted, which is not conducive to maximizing efficiency.

[0045] Specifically, the bearing assembly 16 includes an inner ring 163, an outer ring 162, and a connecting frame 161 connected to the outer ring 162. The connecting frame 161 is horizontally disposed above the inner ring 163 and the outer ring 162, and the connecting frame 161 has a first distance D1 in the vertical direction with respect to the inner ring 163 and the outer ring 162.

[0046] Among them, 0.5mm≤D1≤1mm; if D1<0.5mm, there will be difficulties in processing and interference between the components; if D1>1mm, it will increase the production cost of the connecting frame and also increase the risk of bearing wobbling.

[0047] By setting the connecting bracket 161, the outer ring 162 of the bearing assembly 16 can be supported and kept in a specific position, so that the fan blade 15 drives the inner ring 163 of the bearing assembly 16 to rotate and remain stable.

[0048] The magnetic component 14 is a neodymium magnet, also known as a neodymium iron boron magnet, which is a tetragonal crystal formed by neodymium, iron, and boron. In this embodiment, the number of magnetic components 14 can be 22, and correspondingly, the number of coil windings can be 24. Of course, the number of magnetic components 14 can be other, but the number of coil windings should be adjusted accordingly. For example, the number of magnetic components 14 should be even, and the number of coil windings should be a multiple of 3.

[0049] The first housing 10, the second housing 11, the first mounting bracket 12, and the second mounting bracket 13 are all annular structures and share the same axis.

[0050] In this embodiment, the cross-section of the fan blade 15 has a certain curvature and a certain height at the top and bottom; of course, its shape is not limited to this shape. While ensuring that the avoidance part 18 is present, the curvature angle and shape of the fan blade 15 can be changed; in addition, the number of fan blades can also be reasonably arranged according to the requirements.

[0051] In this embodiment, there is a third distance D3 in the horizontal direction between the fan blade 15 and the second housing 11, wherein D3 ≥ 0.5 mm. The setting of this third distance ensures that the fan blade 15 will not touch the second housing 11 when it rotates, and forms a stable airflow during the rotation inside the second housing 11. This airflow is a high-speed airflow with axial acceleration.

[0052] Specifically, the horizontal plane at the bottom of the second shell 11 is higher than the horizontal plane at the bottom of the first shell 10, and the two have a fourth distance D4 in the vertical direction. The height of the first shell 10 is H1, where D4 ≤ 0.75H1. The second shell 11 has a certain height so that the fan blade 15 can form a high-speed airflow inside the second shell 11 during rotation. If the height of the second shell 11 is too small, i.e., D4 > 0.75H1, the fan blade 15 cannot form a high-speed airflow inside the second shell 11 and cannot provide sufficient thrust for the aircraft.

[0053] Furthermore, in this embodiment, the height of the fan blade 15 is H2, where 0.5H1≤H2≤0.75H1. This numerical relationship ensures that the entire fan blade 15 is located inside the first housing 10, and its height allows it to generate a high-speed airflow inside the first housing 10 when rotating. That is, when the fan blade 15 rotates, it can simultaneously generate a high-speed airflow inside both the first housing 10 and the second housing 11, converting the kinetic energy of the rotating fan blade 15 into thrust for the aircraft, enabling the aircraft to obtain more sufficient power for vertical takeoff and subsequent flight maneuvers.

[0054] like Figure 4 As shown, in this embodiment, the upper part of the fan blade 15 is provided with a clearance portion 18, and the first mounting bracket 12 and the bearing assembly 16 are at least partially located inside the clearance portion 18. With this arrangement, the fan blade 15 can make better use of the space inside the first housing 10, and the height of the fan blade 15 located outside the clearance portion 18 can be further increased, which can disturb more airflow into the first housing 10 and form a high-speed airflow through the drive of the fan blade 15.

[0055] In order to transfer the kinetic energy generated by the coil winding and magnetic component 14 to the fan blade 15, the inner wall of the clearance portion 18 of the fan blade 15 is fixedly connected to the outer wall of the first mounting bracket 12.

[0056] During the entire operation of the power unit, the outer ring 162 and connecting frame 161 of the first housing 10, the second housing 11, the second mounting bracket 13 and the bearing assembly 16 remain stationary, while the first mounting bracket 12, the fan blade 15 and the inner ring 163 of the bearing assembly 16 rotate synchronously. Under the high-speed rotation, the fan blade 15 forms a high-speed airflow in the inner area of ​​the first housing 10 and the second housing 11. The airflow enters from above the power unit and exits from below, thereby generating an upward thrust on the entire power unit.

[0057] In this embodiment, the radius of the inner ring 163 of the bearing assembly 16 is R3, and the inner diameter of the second housing 11 is R2, wherein R3 < R2. This arrangement ensures that the fan blade 15 does not interfere with the inner wall of the second housing 11 when it is fixedly connected to the inner ring 163 of the bearing assembly 16.

[0058] A power unit installation method provided in the embodiments of this application mainly includes:

[0059] The bearing assembly 16 is installed on the outside of the second housing 11. During the installation process, the free end of the connecting bracket 161 is first fixedly connected to the outer wall of the second housing 11.

[0060] The second mounting bracket 13, which is equipped with coil windings, is installed on the outside of the second housing 11 and is located above the bearing assembly 16. The second mounting bracket 13 and the connecting bracket 161 in the bearing assembly 16 have a gap.

[0061] One end of the clearance portion 18 of the fan blade 15 is fixedly connected to the inner wall of the inner ring 163 of the bearing assembly 16, and the other end of the clearance portion 18 is fixedly connected to the outer wall of the first mounting bracket 12.

[0062] The first housing 10 and the second housing 11 are fixedly connected at the top by a fixing bracket. The fixing bracket can be a common straight rod, and the material can be metal or alloy, as long as it meets the strength requirements.

[0063] The first mounting bracket 12, which is equipped with magnetic component 14, is mounted on the outside of the second mounting bracket 13 and bearing assembly 16, and its bottom end is fixedly connected to the bottom end of the clearance portion of the fan blade 15.

[0064] Check for interference. If interference exists, check whether the dimensions of R3 and R2 meet the condition R3 < R2; check whether the second spacing D2 meets the condition 0.5mm ≤ D2 ≤ 1mm; check whether the third spacing D3 meets the condition D3 ≥ 0.5mm.

[0065] When the aforementioned spacing meets the dimensional requirements, three-phase power is supplied to the coil winding, and the power-on and power-off sequence of the coil is controlled by the controller, causing the coil winding to generate a magnetic field. This magnetic field interacts with the magnetic component 14 to generate electromagnetic torque, thereby driving the inner ring 163 of the first mounting bracket 12, fan blade 15, and bearing assembly 16 to rotate around a common axis. During the rotation of the fan blade 15, air is drawn in from above the power unit, accelerated, and then ejected from below, forming axial thrust.

[0066] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0067] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the apparatus embodiments are described simply because they are based on similarities to the method embodiments; relevant parts can be referred to the descriptions of the method embodiments.

[0068] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A power unit, characterized in that, include: The first hull is located on the outermost side of the aircraft, and its inner wall is a flat, annular surface with an inner diameter of R1. The second housing is coaxially arranged with the first housing, and has an inner diameter of R2, wherein R2 ≥ 0.25R1. The second housing is fixedly connected to the first housing. The first mounting bracket is located between the first housing and the second housing, and is provided with a mounting groove for accommodating magnetic components; The second mounting bracket is located on the outer wall of the second housing and has a frame for placing the coil winding; The coil winding is located inside the frame body; A magnetic component is disposed inside the mounting groove; The fan blade extends from the inside of the second housing through the first mounting bracket and below the second mounting bracket to the area between the first housing and the second housing; The bearing assembly is located below the second mounting bracket, with its first end connected to the second housing and its second end connected to the fan blade.

2. The power unit according to claim 1, characterized in that, The bearing assembly includes an inner ring, an outer ring, and a connecting frame connected to the outer ring. The connecting frame is horizontally positioned above the inner and outer rings along the axial direction. The connecting frame and the inner and outer rings have a first distance D1 in the vertical direction, wherein 0.5mm≤D1≤1mm.

3. The power unit according to claim 1, characterized in that, The inner and outer rings of the bearing assembly and the fan blades have a second distance D2 in the vertical direction, wherein 0.5mm≤D2≤1mm.

4. The power unit according to claim 1, characterized in that, There is a third horizontal distance D3 between the fan blade and the second housing, wherein D3 ≥ 0.5 mm.

5. The power unit according to claim 1, characterized in that, The horizontal plane at the bottom of the second housing is higher than the horizontal plane at the bottom of the first housing, and the two have a fourth vertical distance D4. The vertical distance from the top of the first housing to its bottom edge is the height H1 of the first housing, where D4≤0.75H1.

6. The power unit according to claim 5, characterized in that, The height of the fan blade is H2, where 0.5H1≤H2≤0.75H1.

7. The power unit according to claim 1, characterized in that, The upper part of the fan blade has a clearance portion, and the first mounting bracket and bearing assembly are at least partially located inside the clearance portion.

8. The power unit according to claim 7, characterized in that, The inner wall of the clearance portion of the fan blade is fixedly connected to the outer wall of the first mounting bracket.

9. The power unit according to claim 1, characterized in that, The inner ring of the bearing assembly has a radius of R3, and the inner diameter of the second housing is R2, wherein R3 < R2.

10. An installation method, characterized in that, For installing the power unit according to any one of claims 1-9, comprising: The bearing assembly is mounted on the outside of the second housing; A second mounting bracket, which is configured with coil windings, is mounted on the outside of the second housing and located above the bearing assembly; The fan blades are installed on the inner wall of the inner ring of the bearing assembly; The first housing and the second housing are fixedly connected at the top by a fixing bracket; A first mounting bracket equipped with magnetic components is installed on the outside of the second mounting bracket and the bearing assembly, and its bottom end is fixedly connected to the fan blade. Check for any interference.

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