CN216312777U

CN216312777U - Motor stator and aircraft of single spiral water course

Info

Publication number: CN216312777U
Application number: CN202122635709.7U
Authority: CN
Inventors: 淦吉昌; 朱佳君; 吴奇才; 黄华秋
Original assignee: Nanchang Sanrui Intelligent Technology Co Ltd
Current assignee: Nanchang Sanrui Intelligent Technology Co Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-15
Anticipated expiration: 2031-10-29

Abstract

The utility model discloses a motor stator with a single spiral water channel, which comprises a stator body, a stator outer sleeve and a petal washer, wherein the stator outer sleeve is sleeved on the stator body; the stator outer sleeve is sleeved on the stator body, and a spiral flow passage for cooling liquid to flow is arranged between the stator outer sleeve and the stator body; the petal washer is arranged on the outer ring of the stator outer sleeve, and the petal washer is matched with the stator outer sleeve and then ejected out in an outward expanding mode, so that the outer wall surface of the petal washer is tightly matched with the inner ring of the iron core. The utility model adopts the spiral flow channel to dissipate the heat of the motor, and the heat dissipation capability is greatly improved.

Description

Motor stator and aircraft of single spiral water course

Technical Field

The utility model relates to the technical field of motors, in particular to a motor stator with a single spiral water channel and an aircraft.

Background

The outer rotor brushless motor has the advantages of large torque, high rotating speed, low power consumption and low noise. Therefore, electric aircraft typically use an outer rotor brushless motor. Compared with an aircraft using a heat engine as power, the electric aircraft has low noise, is more concealed during military reconnaissance, and has higher survival capability and higher mission success rate. The electric aircraft can be used in various fields such as military reconnaissance, environmental monitoring, emergency rescue and disaster relief.

The existing outer rotor brushless motor has the following problems:

1. the power density of the motor is increased, and the heat dissipation problem is more and more severe;

2. for the outer rotor brushless motor, a liquid cooling cavity is used for heat dissipation in the motor, but the liquid cooling cavity and the like are integrated with the stator;

3. the liquid cooling cavity stator is designed in an integrated mode, the inner wall face of the unique heating source of the motor of the iron core coil is in contact fit with the outer ring wall face of the stator, a certain gap is required between the diameter of the outer ring wall face of the stator and the diameter of the inner ring wall face of the iron core due to the technical requirements of motor assembly, and the gap directly and greatly increases the thermal resistance of the contact heat transfer of the two wall faces, so that the heat transfer effect is seriously influenced;

4. the current scheme is that a large cavity accommodates circulating cooling liquid to pass through, the cavity is large in size, turbulent flow exists in the cavity, flow resistance is increased, cooling liquid circulates slowly at a local position, and the temperature of a stator is easily high locally;

5. stator outer lane wall and iron core inner circle wall can paint the heat conduction silicone grease of high coefficient of heat conductivity in order to fill the clearance, but the processing back then fixed the inside and outside wall diameter of size, if in order to paint more silicone grease, then the clearance will give a little, if the clearance is little, the silicone grease of painting is avoided the face by the interior of iron core and is scraped a lot of silicone grease when packing into the iron core, influences the radiating effect.

Disclosure of Invention

The utility model aims to solve the problems that: the utility model provides a motor stator and aircraft of single spiral water course, adopts the spiral runner to dispel the heat to the motor, and the heat-sinking capability greatly promotes.

The technical scheme provided by the utility model for solving the problems is as follows: a motor stator with a single spiral water channel comprises a stator body, a stator outer sleeve and a petal washer; the stator outer sleeve is sleeved on the stator body, and a spiral flow passage for cooling liquid to flow is arranged between the stator outer sleeve and the stator body; the petal washer is arranged on the outer ring of the stator outer sleeve, and the petal washer is matched with the stator outer sleeve and then ejected out in an outward expanding mode, so that the outer wall surface of the petal washer is tightly matched with the inner ring of the iron core.

Preferably, the spiral flow path is provided on an outer circumferential surface of the stator body.

Preferably, a water inlet pipeline and a water outlet pipeline are arranged on the stator body, the water inlet pipeline is communicated with the upper portion of the spiral flow channel, and the water outlet pipeline is communicated with the lower portion of the spiral flow channel.

Preferably, a low-resistance guide joint is arranged at the transition section of the water inlet pipeline and the spiral flow channel.

Preferably, the outer ring of the stator outer sleeve is provided with an external thread, and the inner ring of the petal washer is provided with an internal thread matched with the external thread.

Preferably, the upper portion and the lower portion of the stator outer sleeve are respectively provided with a first threaded hole, the upper portion and the lower portion of the stator body are provided with a second threaded hole corresponding to the first threaded hole, and the first threaded hole is connected with the second threaded hole through a bolt.

Preferably, a groove is formed in one position of the threaded hole, and a boss matched with the groove is formed in the second position of the threaded hole.

Preferably, the top of the stator jacket is provided with 4 pressing blocks for pressing the iron core, so that the iron core is limited in the axial direction.

Preferably, the upper part and the lower part of the contact surface of the stator outer sleeve and the stator body are provided with sealing rubber rings which are arranged in an annular mode.

It is a further object of this invention to disclose such an aircraft including a single-spiral-channel motor stator as defined in any of the above.

Compared with the prior art, the utility model has the advantages that:

1. conventional scheme is compared to the liquid cooling, and the heat-sinking capability greatly promotes.

2. Compared with the conventional liquid cooling stator design, the spiral flow channel has lower resistance to liquid flow, the flow speed of the cooling liquid is higher under the drive of the same liquid cooling pump, the surface area of the cooling liquid and the radiating surface of the stator body is increased, and the heat transfer capacity is obviously improved. The conventional scheme is that cooling liquid enters from the bottom, so that the temperature of an area, close to the top, of the iron core is easy to be higher, and the scheme is that the cooling liquid enters a spiral flow channel from the top first, so that the temperature difference between the top of the iron core and the lower part is smaller.

3. By adopting the design of the stator outer sleeve, the wall surface of the stator outer sleeve is not required to be made very thick, and the strength of the whole liquid cooling structure is ensured due to the main structure of the stator. The thinner wall thickness means that the core transfers heat to the stator body as a heat source faster and with lower thermal resistance.

4. Compared with the conventional scheme that the interior of the integral cavity is not provided with any flow passage characteristic, the stator body can obviously enhance the capability of bearing axial and radial loads of the motor stator in work. This is particularly important for motors used on aircraft. The deformation during operation is reduced, and the reliability and the service life are improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model.

FIG. 1 is an exploded schematic view of the present invention;

fig. 2 is a schematic perspective view of a stator body according to the present invention;

FIG. 3 is a front view of the stator body of the present invention;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a front view of the present invention;

fig. 6 is a cross-sectional view C-C of fig. 5.

The attached drawings are marked as follows: 1. the stator comprises an iron core, 2, a petal washer, 3, a low-resistance guide joint, 4, a pressing block, 5, external threads, 6, a boss, 7, a first threaded hole, 8, a groove, 9, a second threaded hole, 10, a spiral flow channel, 11, a stator outer sleeve, 12, a water inlet pipeline, 13, a water outlet pipeline, 14, a stator body, 15 and a transition section.

Detailed Description

The embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, so that how to implement the technical means for solving the technical problems and achieving the technical effects of the present invention can be fully understood and implemented.

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated without limiting the specific scope of protection of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the utility model, "a number" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

The embodiment of the utility model is shown in figures 1-6, a motor stator with a single spiral water channel comprises a stator body 14, a stator outer sleeve 11 and a petal washer 2; the stator jacket 11 is sleeved on the stator body 14, and a spiral flow channel 10 for cooling liquid to flow is arranged between the stator jacket 11 and the stator body 14; the petal washer 2 is arranged on the outer ring of the stator jacket 11, and the petal washer 2 is matched with the stator jacket 11 and then is ejected out in an outward expanding way, so that the outer wall surface of the petal washer 2 is tightly matched with the inner ring of the iron core 1.

In the present embodiment, the spiral flow path 10 is provided on the outer circumferential surface of the stator body 14.

In this embodiment, the stator body 14 is provided with a water inlet pipeline 12 and a water outlet pipeline 13, the water inlet pipeline 12 is communicated with the upper portion of the spiral flow channel 10, and the water outlet pipeline 13 is communicated with the lower portion of the spiral flow channel 10.

Specifically, the cooling liquid enters from the water inlet pipeline and is directly communicated to the top of the stator body, and then is guided to the spiral flow channel through a transitional straight pipeline, and flows along the spiral flow channel to the lower part of the stator body. Flows to the tail end of the spiral flow channel and then is transited to a water outlet pipeline to flow out.

Wherein, the water inlet pipeline and the water outlet pipeline are provided with standard threads for fixing external joints.

In this embodiment, a low-resistance guiding joint 3 is installed at the transition section 15 between the water inlet pipe 12 and the spiral flow channel 10. The low-resistance guide joint is used for sealing a transition region between the water inlet pipeline and the spiral flow channel, and is provided with an arc groove design, so that cooling liquid can have fillet transition when flowing through the low-resistance guide joint, and the flow resistance is obviously reduced.

In this embodiment, an outer ring of the stator housing 11 is provided with an external thread 5, and an inner ring of the petal washer 2 is provided with an internal thread matching with the external thread 5.

In this embodiment, the upper portion and the lower portion of the stator outer sleeve 11 are both provided with a first threaded hole 7, the upper portion and the lower portion of the stator body 14 are provided with a second threaded hole 9 at a position corresponding to the first threaded hole 7, and the first threaded hole 7 and the second threaded hole 9 are connected through a bolt.

In this embodiment, a groove 8 is formed in the first threaded hole 7, and a boss 6 matched with the groove 8 is formed in the second threaded hole 9. The boss and the groove are used for positioning and transmitting circumferential force.

In this embodiment, the top of the stator casing 11 is provided with 4 pressing blocks 4 for pressing the iron core 1, so as to press the top end surface of the iron core 1, and limit the iron core 1 in the axial direction.

In the present embodiment, the upper and lower portions of the contact surfaces of the stator housing 11 and the stator body 14 are provided with sealing rubber rings arranged annularly.

Wherein, the inside air-cooled radiating fin that still integrates of stator body is at water-cooling in order to assist the heat-sinking capability that increases simultaneously.

Besides pure water, the cooling liquid in the utility model can be other cooling liquids of other industrial common brands, even oil liquid.

Wherein, a temperature control cooling fan can be integrated again at the stator body bottom of motor, reinforcing forced air cooling heat-sinking capability. And the condition that the liquid cooling heat dissipation has faults is dealt with.

Specifically, the installation process sequence of the utility model is that the stator outer sleeve is firstly matched with the stator body in a rotating way, the petal washer is inserted into the inner ring of the iron core, the contact surface of the outer ring of the petal washer and the iron core is pre-coated with heat-conducting silicone grease in advance, the petal washer belongs to an ultrathin wall piece, and four notches are used for the deformation margin of the contraction and expansion of the petal washer. The external thread of the stator outer sleeve is precoated with a certain amount of heat-conducting silicone grease, then the iron core and petal washer assembly is screwed into the stator body and the external assembly according to the thread engagement, the thread is screwed in continuously, the petal washer is outwards expanded and ejected by the stator assembly, the outer wall surface of the petal washer is strongly pressed on the inner ring of the iron core until all threads are screwed in, the petal washer is tightly and firmly filled between the stator outer sleeve and the iron core, and gaps between every two petal washers are uniformly filled with the high-performance heat-conducting silicone grease. Therefore, the heat transfer resistance of the multi-layer heat transfer interface is greatly reduced, and the heat transfer effect from the heating body to the cooling liquid is obviously improved.

The embodiment also discloses an aircraft which comprises the motor stator with the single-spiral water channel.

The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the scope of the utility model as defined by the independent claims are intended to be embraced therein.

Claims

1. A motor stator of single spiral water course, includes stator body (14), its characterized in that: the stator comprises a stator outer sleeve (11) and a petal washer (2); the stator jacket (11) is sleeved on the stator body (14), and a spiral flow channel (10) for cooling liquid to flow is arranged between the stator jacket (11) and the stator body (14); the petal washer (2) is arranged on the outer ring of the stator outer sleeve (11), and the petal washer (2) is matched with the stator outer sleeve (11) and then ejected out in an outward expanding way, so that the outer wall surface of the petal washer (2) is tightly matched with the inner ring of the iron core (1).

2. The stator of a single-spiral water channel motor of claim 1, wherein: the spiral flow channel (10) is arranged on the outer circumferential surface of the stator body (14).

3. The stator of a single-spiral water channel motor of claim 2, wherein: the stator body (14) is provided with a water inlet pipeline (12) and a water outlet pipeline (13), the water inlet pipeline (12) is communicated with the upper part of the spiral flow channel (10), and the water outlet pipeline (13) is communicated with the lower part of the spiral flow channel (10).

4. The stator of a single-spiral water channel motor according to claim 3, wherein: and a low-resistance guide joint (3) is arranged at the transition section (15) of the water inlet pipeline (12) and the spiral flow channel (10).

5. The stator of a single-spiral water channel motor of claim 1, wherein: an outer ring of the stator outer sleeve (11) is provided with an external thread (5), and an inner ring of the petal washer (2) is provided with an internal thread matched with the external thread (5).

6. The stator of a single-spiral water channel motor of claim 1, wherein: the upper portion and the lower portion of the stator outer sleeve (11) are provided with a first threaded hole (7), the upper portion and the lower portion of the stator body (14) are provided with a second threaded hole (9) at a position corresponding to the first threaded hole (7), and the first threaded hole (7) and the second threaded hole (9) are connected through bolts.

7. The stator of a single-spiral water channel motor according to claim 6, wherein: the threaded hole I (7) is provided with a groove (8), and the threaded hole II (9) is provided with a boss (6) matched with the groove (8).

8. The stator of a single-spiral water channel motor of claim 1, wherein: stator overcoat (11) top is provided with 4 briquetting (4) that compress tightly iron core (1) for compress tightly iron core (1) top end face, make iron core (1) spacing on axial direction.

9. The stator of a single-spiral water channel motor of claim 1, wherein: and the upper part and the lower part of the contact surface of the stator outer sleeve (11) and the stator body (14) are respectively provided with a sealing rubber ring which is annularly arranged.

10. An aircraft, characterized in that: the aircraft comprising an electric machine stator with a single helical waterway according to any one of claims 1 to 9.