EVTOL aircraft and axial double-rotor motor thereof

Abstract

The invention discloses an eVTOL aircraft and an axial double-rotor motor thereof, the axial double-rotor motor comprises a stator and rotors rotatably arranged at the two ends of the stator respectively, the stator comprises a stator support and a plurality of iron cores arranged in the stator support, the surface of each iron core is provided with a winding, and the windings are wound around the stator support. An insulation sleeve is arranged between the winding and the iron core, the rotor comprises a rotor disc, a plurality of permanent magnets are arranged in the end face, close to the stator, of the rotor disc, and the rotor disc is rotationally connected to the stator support through a rotor support. The axial double-rotor motor is compact in structure, the double rotors rotate synchronously, and the output torque is increased.

Description

Technical Field

[0001] The present application relates to the field of electric motor technology, and in particular to an eVTOL aircraft and an axial dual-rotor motor thereof. Background Art

[0002] The eVTOL (electric Vertical Take-off and Landing) aircraft uses a motor to drive the wings to rotate and provide power for the aircraft. Existing motors are divided into axial motors and radial motors. Axial motors have advantages such as shortened magnetic circuit, reduced iron core usage, high power and torque density, and are widely used. However, axial motors do not have stator brackets, which makes heat dissipation difficult. In addition, the two sides of the iron core need to be pressed or glued as a whole, resulting in an excessive air gap and increased copper loss. Summary of the invention

[0003] The object of the present invention is to provide an eVTOL aircraft and an axial dual-rotor motor thereof to overcome the deficiencies in the prior art.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] An embodiment of the present application discloses an axial dual-rotor motor, comprising a stator and rotors rotatably arranged at both ends of the stator, wherein the stator comprises a stator bracket and a plurality of iron cores arranged in the stator bracket, a winding is arranged on the surface of the iron core, an insulating sleeve is arranged between the winding and the iron core, the rotor comprises a rotor disk, a plurality of permanent magnets are arranged in the end surface of the rotor disk close to the stator, and the rotor disk is rotatably connected to the stator bracket through the rotor bracket.

[0006] Furthermore, in the above-mentioned axial dual-rotor motor, a plurality of first grooves are respectively formed on both circumferential sides of the core, a plurality of first bosses corresponding to the first grooves are respectively protruded from the inner walls on both sides of the insulating sleeve, and a second groove is formed on the back side of the first boss.

[0007] Furthermore, in the above-mentioned axial dual-rotor motor, the wiring harnesses of the windings are sequentially clamped in the corresponding second grooves.

[0008] Furthermore, in the above-mentioned axial dual-rotor motor, the insulating sleeve has second bosses protruding from the outer walls at both ends corresponding to the rotor.

[0009] Furthermore, in the above-mentioned axial dual-rotor motor, the stator bracket is an annular structure, and the rotor bracket is rotatably disposed on the inner wall of the stator bracket through a first bearing.

[0010] Furthermore, in the above-mentioned axial dual-rotor motor, a plurality of mounting grooves for accommodating the iron core are arranged in the stator bracket, and cover plates abutting against the second boss are respectively arranged on both sides of the two ends of the mounting groove.

[0011] Furthermore, in the above-mentioned axial dual-rotor motor, pole shoes are respectively provided at two ends of the iron core close to the corresponding rotors.

[0012] Furthermore, in the above-mentioned axial dual-rotor motor, it also includes a mounting platform, which is arranged on a side of the rotor away from the stator and connected to the stator bracket, and the mounting platform is rotatably connected to the rotor bracket via a rotating shaft.

[0013] The embodiment of the present application also discloses an eVTOL aircraft, including the above-mentioned axial dual-rotor motor, wherein the mounting platform is fixed to the fuselage of the eVTOL aircraft, and the rotor disk facing away from the mounting platform is connected to a flying wing.

[0014] Furthermore, in the above-mentioned eVTOL aircraft, the mounting platform is integrally formed with the fuselage of the eVTOL aircraft.

[0015] Compared with the prior art, the advantages of the present invention are: the axial dual-rotor motor has a stable structure, the iron core is arranged in the stator bracket, which is conducive to heat dissipation, and the inner and outer sides of the side wall of the insulating sleeve are respectively provided with a serrated first boss and a second groove, which cooperate with the iron core and the winding respectively to limit the axial displacement of the iron core, without the need for glue injection or setting a pressure plate, thereby reducing the air gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 Shown is a schematic structural diagram of an axial dual-rotor motor in a specific embodiment of the present invention.

[0018] Figure 2 Shown is a cross-sectional schematic diagram of an axial dual-rotor motor in a specific embodiment of the present invention.

[0019] Figure 3 Shown is an exploded schematic diagram of an axial dual-rotor motor in a specific embodiment of the present invention.

[0020] Figure 4 FIG. 1 is a schematic diagram showing the position of a cover plate in a specific embodiment of the present invention.

[0021] Figure 5 It is a schematic diagram of the installation of the iron core, the insulating sleeve and the winding in a specific embodiment of the present invention.

[0022] Figure 6 The figure shows an exploded schematic diagram of an iron core, an insulating sleeve and a winding in a specific embodiment of the present invention.

[0023] Figure 7 The figure shows the installation diagram of the iron core, the insulating sleeve and the winding in another specific embodiment of the present invention.

[0024] Figure 8 Shown is an exploded schematic diagram of an iron core, an insulating sleeve and a winding in another specific embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following will describe the technical solutions in the embodiments of the present invention in detail in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Ginseng Figures 1 to 8As shown, an axial dual-rotor motor includes a stator and rotors rotatably arranged at both ends of the stator, the stator includes a stator bracket 1 and a plurality of iron cores 2 arranged in the stator bracket 1, a winding 3 is arranged on the surface of the iron core 2, an insulating sleeve 4 is arranged between the winding 3 and the iron core 2, the rotor includes a rotor disk 5, a plurality of permanent magnets 6 are arranged in the end surface of the rotor disk 5 close to the stator, and the rotor disk 5 is rotatably connected to the stator bracket 1 through a rotor bracket 7.

[0029] In this technical solution, the permanent magnet is a conventional permanent magnet and is fixed in the end face of the corresponding rotor disk by a conventional embedded structure. The axially corresponding permanent magnets in the two rotor disks have the same polarity, are subjected to the same direction torque applied by the stator, and rotate synchronously. The stator bracket is made of non-magnetic, high-resistance metal or engineering plastic or composite carbon fiber or engineering plastic-coated non-magnetic, high-resistance metal, so as to avoid or reduce the electromagnetic induction and eddy current generated by the stator bracket. The stator bracket is an annular structure, including a coaxially arranged inner ring and outer ring and a connecting strip connected between the inner ring and the outer ring. An installation groove is formed between adjacent connecting strips and the inner ring and the outer ring. The installation groove penetrates the stator bracket along the axial direction of the stator bracket. After the corresponding winding, insulating sleeve and iron core are installed, they are installed as a whole in the corresponding installation groove. During operation, the heat generated by the iron core and winding is conducted through the stator bracket to improve the heat dissipation effect.

[0030] For example, see Figures 5 to 8 As shown, a plurality of first grooves 21 are respectively formed on both circumferential sides of the core 2 , a plurality of first bosses 41 corresponding to the first grooves 21 are respectively formed on the inner walls of both sides of the insulating sleeve 4 , and a second groove 42 is formed on the back of the first bosses 41 .

[0031] In this technical solution, the insulating sleeve is a hollow trapezoidal or fan-shaped right prism structure, and its circumferential inner wall (the inner wall of the two side walls radially arranged along the stator bracket after the insulating sleeve is installed in the installation groove) is respectively protruded with a plurality of first bosses to form a serrated structure, and the iron core is formed by stacking a plurality of silicon steel sheets, etc., and the stacked iron core corresponds to the hollow part of the insulating sleeve, and serrations are arranged on both sides of each silicon steel sheet. After stacking, the serrations of the silicon steel sheet form a first groove corresponding to the first boss, so that the iron core and the insulating sleeve are relatively fixed axially, wherein the insulating sleeve is molded on or assembled on the outer wall of the stacked iron core.

[0032] For example, see Figures 5 to 8 As shown, the wire harnesses of the winding 3 are sequentially clamped in the corresponding second grooves 42 .

[0033] In this technical solution, a plurality of second grooves are respectively provided on the circumferential inner wall of the insulating sleeve, and the bottom wall of the second groove forms a first boss. The winding is made of a wire bundle such as a conventional enameled flat copper wire. During the winding process, the wire bundle of the winding is successively clamped in the corresponding second grooves, and the winding and the insulating sleeve are axially relatively fixed, that is, the winding and the iron core are axially relatively fixed.

[0034] For example, see Figures 1 to 8 As shown, second bosses 43 are respectively protruded from the outer walls of both ends of the insulating sleeve 4 close to the corresponding rotor.

[0035] In this technical solution, the winding is clamped between the two second bosses to prevent it from being loose.

[0036] For example, see Figures 1 to 4 As shown, the stator support 1 is an annular structure, and the rotor support 7 is rotatably disposed on the inner wall of the stator support 1 through a first bearing 8 .

[0037] In this technical solution, the first bearing is a conventional bearing that can achieve a rotational connection between the rotor bracket and the stator, and the rotor disk is connected to both ends of the rotor by bolts or the like.

[0038] For example, see Figures 1 to 4 As shown, a plurality of mounting grooves for accommodating the iron core 2 are arranged in the stator support 1 , and cover plates 9 abutting against the second bosses 43 are respectively arranged on both sides of the two ends of the mounting grooves.

[0039] In this technical solution, the cover plate is divided into an inner ring cover plate and an outer ring cover plate, which are respectively fixed to the corresponding end faces between the stators by bolts or the like, and respectively abut against the corresponding second bosses, so that the insulating sleeve is axially fixed in the mounting groove, that is, the winding and the iron core are axially fixed, and the inner ring cover plate and the outer ring cover plate are not in direct contact with the winding and the iron core. At the same time, a space for accommodating permanent magnets is formed between the inner ring cover plate and the outer ring cover plate, thereby reducing the distance between the permanent magnet and the iron core, that is, reducing the air gap; after the iron core, the insulating sleeve and the winding are placed as a whole into the mounting groove of the stator bracket, the inner ring cover plate and the outer ring cover plate clamp the iron core (that is, clamp the iron core, the insulating sleeve and the winding as a whole), and the iron core bears the reaction force of the rotor, and the iron core, the insulating sleeve and the winding are fixed to each other as a whole through a serration structure, thereby transmitting the reaction force to the inner ring cover plate, the outer ring cover plate and the stator bracket.

[0040] For example, see Figure 7 and Figure 8 As shown, pole shoes are respectively provided at two ends of the iron core 2 close to the corresponding rotor.

[0041] In this technical solution, pole shoes are provided on the iron core, which will increase the amount of iron core and increase the iron loss, but can reduce the cogging torque pulsation of the motor; see Figure 5 and Figure 6As shown, the core may not be provided with pole shoes, which can reduce the amount of core used and iron loss, and the corresponding motor's cogging torque pulsation will increase.

[0042] For example, see Figures 1 to 4 As shown, it also includes a mounting platform 10 , which is arranged on a side of the rotor away from the stator and connected to the stator bracket 1 . The mounting platform 10 is rotatably connected to the rotor bracket 7 via a rotating shaft 20 .

[0043] In this technical solution, the mounting platform is a disc-shaped structure and is connected to one end of the rotating shaft by bolts or the like. The other end of the rotating shaft is rotatably connected to the rotor bracket by a second bearing so as not to interfere with the operation of the rotor bracket. A plurality of mounting columns protrude from the end surface edge of the mounting platform close to the stator bracket. The outer wall of the stator bracket is provided with connecting columns corresponding to the mounting columns, and the connecting columns are connected to the mounting columns by conventional bolts or the like. The mounting platform and the rotor disk close to it are spaced apart so as not to interfere with the free operation of the rotor disk.

[0044] See also Figures 1 to 3 As shown, an eVTOL aircraft includes the above-mentioned axial dual-rotor motor, a mounting platform is fixed to the fuselage of the eVTOL aircraft, and a rotor disk 5 facing away from the mounting platform 10 is connected to a flying wing 30.

[0045] In this technical solution, the mounting platform is fixed to the fuselage of the eVTOL aircraft by conventional bolts, etc., and the flying wing of the eVTOL aircraft is fixed to the rotor disk facing away from the mounting platform by conventional bolts, etc., so that the flying wing is driven to rotate by the axial dual-rotor motor.

[0046] Exemplarily, the mounting platform 10 is formed integrally with the fuselage of the eVTOL aircraft.

[0047] In this technical solution, the rotating shaft is directly connected to the fuselage of the eVTOL aircraft through conventional bolts. At the same time, a mounting column protrudes from the fuselage of the eVTOL aircraft, which is used to connect the connecting column of the stator bracket through bolts or the like.

[0048] To sum up, the axial dual-rotor motor has a stable structure, and the iron core is arranged in the stator bracket, which is conducive to heat dissipation. The inner and outer sides of the side wall of the insulating sleeve are respectively provided with a serrated first boss and a second groove, which cooperate with the iron core and the winding respectively to limit the axial displacement of the iron core. There is no need for glue filling or setting a pressure plate to reduce the air gap.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0050] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An axial dual-rotor motor, characterized in that: The invention comprises a stator and rotors which are rotatably arranged at two ends of the stator respectively. The stator comprises a stator bracket and a plurality of iron cores arranged in the stator bracket. The surface of the iron core is provided with a winding. An insulating sleeve is arranged between the winding and the iron core. The rotor comprises a rotor disk. A plurality of permanent magnets are arranged in the end surface of the rotor disk close to the stator. The rotor disk is rotatably connected to the stator bracket through the rotor bracket.

2. The axial dual-rotor motor according to claim 1, characterized in that: A plurality of first grooves are respectively formed on both circumferential sides of the core, a plurality of first bosses corresponding to the first grooves are respectively formed on the inner walls of both sides of the insulating sleeve, and a second groove is formed on the back of the first bosses.

3. The axial dual-rotor motor according to claim 2, characterized in that: The wiring harnesses of the windings are sequentially clamped in the corresponding second grooves.

4. The axial dual-rotor motor according to claim 1, characterized in that: The insulating sleeve has second bosses protruding from the outer walls at both ends corresponding to the rotor.

5. The axial dual-rotor motor according to claim 4, characterized in that: The stator support is an annular structure, and the rotor support is rotatably arranged on the inner wall of the stator support via a first bearing.

6. The axial dual-rotor motor according to claim 5, characterized in that: A plurality of mounting grooves for accommodating the iron core are arranged in the stator support, and cover plates abutting against the second boss are respectively arranged on both sides of the two ends of the mounting groove.

7. The axial dual-rotor motor according to claim 1, characterized in that: The iron core is respectively provided with pole shoes at two ends close to the corresponding rotor.

8. The axial dual-rotor motor according to any one of claims 1 to 7, characterized in that: It also includes a mounting platform, which is arranged on a side of the rotor away from the stator and connected to the stator bracket. The mounting platform is rotatably connected to the rotor bracket via a rotating shaft.

9. An eVTOL aircraft, characterized in that: It includes the axial dual-rotor motor as described in claim 8, wherein the mounting platform is fixed to the fuselage of the eVTOL aircraft, and the rotor disk facing away from the mounting platform is connected to the flying wing.

10. The eVTOL aircraft according to claim 9, characterized in that: The mounting platform is integrally formed with the fuselage of the eVTOL aircraft.

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