CN212033942U - Motor and wind generating set - Google Patents

Abstract

The utility model relates to a motor and a wind power generator set. The motor includes: a stator, including radial channels spaced along its own axial direction; a rotor, which is coaxially arranged with the stator, and an air gap is formed between the rotor and the stator in the radial direction; a rotor bracket, which is provided with a first end along the axial direction. The air inlet; the stator bracket is dynamically sealed with the rotor bracket to form a first ventilation chamber and a second ventilation chamber located at both axial ends of the motor and connected with the air gap; the first air inlet and the first ventilation chamber Connected; the stator support is also provided with a first chamber and a second chamber that are not connected to each other along its circumferential direction. The first chamber is connected with the radial channel, and the first chamber is provided with a first air outlet; the second chamber Located radially inside the first chamber, the second chamber is provided with a second air inlet and a second air outlet, and the second air outlet is connected with the second ventilation chamber. The motor forms a cooling channel within its own structure that communicates with the external environment. The overall structure is simple, compact, and takes up little space.

Description

Motors and Wind Turbines

technical field

The utility model relates to the technical field of wind power generation, in particular to a motor and a wind power generator set.

Background technique

Wind power is one of the renewable energy technologies closest to commercialization and is the focus of renewable energy development. The motor in the wind turbine has heat loss during operation, which mainly includes: electromagnetic loss, that is, the Joule heat generated by the ohmic impedance in the winding, that is, the copper loss; hysteresis loss and eddy current loss in the iron core, etc., that is, the iron loss loss; and unavoidable stray losses; and in the case of permanent magnet motors, pole losses. These losses cause the motor to release a large amount of heat during operation, and this heat will not only cause a certain impact on the motor itself and its insulation structure, resulting in shortened insulation life or even insulation failure, but also lead to the continuous decline of the output power of the motor.

Among the many cooling methods adopted by wind turbines, the air cooling method utilizes the convection of natural wind for heat dissipation, which has the advantages of high reliability, easy maintenance and no pollution. The air cooling method can also simplify the structure of the wind turbine, especially in high altitude, dry, Low temperature areas have been widely used.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a motor and a wind power generator set. The motor forms a cooling channel in its own structure that communicates with the external environment, and the overall structure is simple, compact, and occupies a small space.

On the one hand, the utility model proposes a motor, comprising: a stator, including radial channels spaced along its own axial direction; a rotor, arranged coaxially with the stator, and an air gap is formed between the rotor and the stator along the radial direction; the rotor bracket, the rotor is fixed on the rotating shaft through the rotor bracket, and one end of the rotor bracket is provided with a first air inlet along the axial direction; the stator bracket, the stator is fixed on the fixed shaft through the stator bracket, and a bearing is arranged between the rotating shaft and the fixed shaft; the stator The bracket is connected with the rotor bracket in dynamic sealing to form a first ventilation chamber and a second ventilation chamber which are located at the axial ends of the motor and communicate with the air gap, and the first air inlet is communicated with the first ventilation chamber; The circumferential direction itself is also provided with a first chamber and a second chamber that are not connected to each other, the first chamber is communicated with the radial channel, and the first chamber is provided with a first air outlet; the second chamber is located in the first chamber The radial inner side of the second chamber is provided with a second air inlet and a second air outlet, and the second air outlet is communicated with the second ventilation chamber; wherein, the first ventilation chamber, the second ventilation chamber, the air gap , the radial channel, the first chamber and the second chamber form a cooling channel communicating with the external environment through the first air inlet, the second air inlet, the second air outlet and the first air outlet.

According to one aspect of the present invention, the rotor support includes a first annular plate extending in the axial direction, and first and second rotor end plates disposed at both axial ends of the first annular plate. The first rotor end plate A first air inlet is provided, and the rotor bracket is connected with the stator bracket in a dynamic seal through the second rotor end plate; the rotor includes a rotor magnetic yoke and a magnetic pole arranged on the rotor magnetic yoke, and the rotor magnetic yoke is located on the side of the first annular plate facing the stator. .

According to one aspect of the present invention, the stator bracket includes a radially extending support plate, a first support plate and a second support plate connected with the support plate, a first cavity is formed between the first support plate and the stator, and a second support plate is formed between the first support plate and the stator. The support plate is located at the radial inner side of the first support plate, and the second support plate, the first support plate and the support plate form a second cavity.

According to one aspect of the present invention, the first bracket plate includes a second annular plate extending in an axial direction, a first stator end plate and a second stator end plate located at both axial ends of the second annular plate and extending radially outward. A stator end plate, a first connecting plate connected with the first stator end plate and extending in the axial direction, a second connecting plate connected with the second stator end plate and extending in the axial direction, and the second annular plate is connected with the support plate The first connecting plate and the second connecting plate respectively support the two axial ends of the stator, and the second annular plate, the first stator end plate, the second stator end plate and the stator enclose a first chamber.

According to one aspect of the present invention, a channel communicating with the first ventilation chamber is formed between the first connecting plate and the first rotor end plate.

According to one aspect of the present invention, the second connecting plate is connected to the second rotor end plate in a dynamic and sealing manner, and the side of the second bracket plate, the support plate and the first bracket plate facing the second connecting plate forms a second cavity.

According to one aspect of the present invention, the support plate is provided with a second air inlet communicating with the second chamber, and the second connecting plate is provided with a second air outlet communicating with the second ventilation chamber.

According to one aspect of the present utility model, the number of the first chambers is multiple, the multiple first chambers are spaced apart and communicated with each other along the circumferential direction of the stator bracket, wherein at least one of the first chambers is provided on the second annular plate There is a first air outlet, and a second chamber is provided on the radial inner side of the remaining first chambers.

On the other hand, the utility model also provides a wind power generator set, the wind power generator set includes: the motor as described above, the motor has opposite windward sides and leeward sides along its axial direction, and the first inlet of the motor has opposite sides. The air outlet is located on the windward side; the impeller is located on the windward side of the motor and is coaxially arranged with the motor, and the impeller drives the motor to rotate; One air outlet is communicated with, and the other end is communicated with the air outlet.

According to one aspect of the present invention, the impeller includes a hub, blades disposed on the hub, and a shroud disposed on the outer peripheral side of the hub, and between the shroud and the rotor support of the motor and between the shroud and the blades Breathable seal.

The utility model provides a motor. A first chamber and a second chamber that are not connected to each other are arranged in the circumferential direction of the stator bracket, a first air inlet is arranged at one end of the rotor bracket in the axial direction, and a second chamber is arranged in the second chamber. There are two air inlets, and the first air inlet is communicated with the first ventilation chamber at one end of the motor axis, the second chamber is communicated with the second ventilation chamber at the other end of the motor axis, and the first chamber and the stator are along its own axis. The radial channels distributed at intervals are connected, and the first chamber is provided with a first air outlet, so that the cooling air in the external environment enters the first ventilation chamber through the first air inlet, and enters the second ventilation chamber through the second air inlet The rear confluence, and then flows through the heat-generating components inside the motor, enters the first chamber, and flows out from the first air outlet. The motor forms a cooling channel within its own structure that communicates with the external environment, and the overall structure is simple, compact and takes up little space. In addition, the utility model provides a wind power generator set, using the motor, it is not necessary to configure special cooling equipment for the motor, reduce the self-consumption of the power set itself, reduce the cost of the whole machine and the load of the whole machine, the cost is lower, and the wind power generation is improved. Unit reliability and maintainability.

Description of drawings

The features, advantages and technical effects of the exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the drawings, the same components are given the same reference numerals. The drawings are not drawn to actual scale.

1 is a schematic diagram of a longitudinal cross-sectional structure of a motor provided by an embodiment of the present invention along an angle;

Fig. 2 is the longitudinal sectional structure schematic diagram of the motor in Fig. 1 along another angle;

3 is a schematic structural diagram of a wind power generator set provided by an embodiment of the present invention;

FIG. 4 is an enlarged schematic view of the structure of the region B in FIG. 3 .

Description of reference numbers:

motor-1; impeller-2; hub-21; blades-22; shroud-23; nacelle-3; air duct-31; vent-32; seal 4; tower-T;

Stator-11; Radial Channel-11a; Core Assembly-111; Stator Winding-112; Air Gap-A; First Ventilation Chamber-A1; Second Ventilation Chamber-A2;

rotor-12;

Rotor bracket-13; First air inlet-13a; First annular plate-133; First rotor end plate-131; Second rotor end plate-132;

Stator Bracket-14; First Chamber-14a; Second Chamber-14b; First Air Outlet-141a; Second Air Inlet-142a; Second Air Outlet-142b; First Bracket Plate-141; Second Bracket plate-142; support plate-143; first stator end plate-1411; second stator end plate-1412; second annular plate-1413; first connecting plate-1414; second connecting plate-1415;

Fixed shaft -15; bearing -16.

Detailed ways

Features and exemplary embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention; and, the dimensions of some structures may be exaggerated for clarity. Furthermore, the features, structures or characteristics described below may be combined in any suitable manner in one or more embodiments.

The orientation words appearing in the following description are all directions shown in the figures, and do not limit the specific structures of the motor and the wind turbine of the present invention. In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrally connected; either directly or indirectly. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific conditions.

In order to better understand the present invention, the motor and the wind power generator set provided by the embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 3 .

1 is a schematic diagram of a longitudinal cross-sectional structure of a motor according to an embodiment of the present invention along an angle, and FIG. 2 is a schematic diagram of a longitudinal cross-sectional structure of the motor in FIG. 1 along another angle.

Please refer to FIG. 1 and FIG. 2 together, an embodiment of the present invention provides a motor 1, and the motor 1 may be a permanent magnet motor or an electric excitation motor. The motor 1 may have an outer rotor and an inner stator structure, or an outer stator and an inner rotor structure. For ease of description, the embodiments of the present invention are described by taking a permanent magnet motor having an outer rotor and an inner stator structure as an example.

The motor 1 includes: a stator 11 , a rotor 12 , a rotor support 13 and a stator support 14 . The stator 11 is fixed on the fixed shaft 15 through the stator support 14, the rotor 12 is fixed on the rotating shaft (not shown in the figure) through the rotor support 13, and a bearing 16 is arranged between the fixed shaft 15 and the rotating shaft to realize the connection between the two. relative rotation.

The stator 11 includes radial passages 11a spaced apart along its axial direction. Specifically, the stator 11 includes a plurality of stator iron cores 111 arranged at intervals in the axial direction and stator windings 112 wound on the plurality of stator iron cores 111 , and the radial direction is formed between every two adjacent stator iron cores 111 . channel 11a.

The rotor 12 is disposed coaxially with the stator 11 , and an air gap A is formed between the rotor 12 and the stator 11 in the radial direction.

A first air inlet 13a is provided at one end of the rotor bracket 13 along the axial direction. For a permanent magnet motor, the rotor 12 includes a rotor magnetic yoke and magnetic poles arranged on the rotor magnetic yoke, and the rotor magnetic yoke is located on the rotor support 13 . The stator winding 112, the stator core 111 and the magnetic poles are all heat generating components.

The stator bracket 14 is connected with the rotor bracket 13 in dynamic sealing to form a first ventilation chamber A1 and a second ventilation chamber A2 which are located at both axial ends of the motor 1 and communicate with the air gap A. The first air inlet 13a is connected to the first ventilation chamber A1 and the second ventilation chamber A2. The ventilation chamber A1 is communicated.

The stator bracket 14 is also provided with a first chamber 14a and a second chamber 14b which are not communicated with each other along its circumferential direction. The first chamber 14a is communicated with the radial passage 11a, and the first chamber 14a is provided with a first air outlet 141a The second chamber 14b is located on the radially inner side of the first chamber 14a, the second chamber 14b is provided with a second air inlet 142a and a second air outlet 142b, and the second air outlet 142b communicates with the second ventilation chamber A2 .

Among them, the first ventilation chamber A1, the second ventilation chamber A2, the air gap A, the radial channel 11a, the first chamber 14a and the second chamber 14b pass through the first air inlet 13a, the second air inlet 142a, the The two air outlets 142b and the first air outlet 141a form a cooling channel communicating with the external environment.

As shown in Figures 1 and 2, the cooling process of the motor 1 is as follows: the air from the outside enters the motor 1 through the first air inlet 13a, and is divided into two airflows at the same time: one of the airflows is directed along the arrow in Figure 2. Enter the first ventilation chamber A1 at the axial end of the motor 1 (ie, the right side in FIG. 2 ); the other airflow enters the second chamber 14b through the second air inlet 142a, and then passes through the second air outlet 142b along the direction of FIG. 2 The arrow in the motor 1 enters the second ventilation chamber A2 at the other axial end of the motor 1 (ie, the left side of FIG. 2 ), and the two airflows entering the first ventilation chamber A1 and the second ventilation chamber A2 are connected between the rotor 12 and the stator. The gap A between 11 and 11 converges, and together flows through a plurality of radial passages 11a distributed at intervals along the axial direction. The tuyere 141a dissipates heat into the external environment, thereby achieving cooling of the motor 1 .

In the motor 1 provided by the embodiment of the present invention, a first chamber 14a and a second chamber 14b that are not connected to each other are provided in the circumferential direction of the stator bracket 14 , and a first air inlet 13a is provided at one end of the rotor bracket 13 in the axial direction. A second air inlet 142a is provided in the second chamber 14b, and the first air inlet 13a is communicated with the first ventilation chamber A1 at one end of the motor 1 in the axial direction, and the second chamber 14b is connected with the second ventilation at the other end of the motor shaft. The chamber A2 is connected, the first chamber 14a is communicated with the radial passages 11a distributed along the axial direction of the stator 11, and the first chamber 14a is provided with a first air outlet 141a, so that the cooling air in the external environment passes through the first air outlet 141a. The air inlet 13a enters the first ventilation chamber A1, enters the second ventilation chamber A2 through the second air inlet 142a, and then confluence, and then flows through the heating components inside the motor and then enters the first chamber 14a, and flows from the first air outlet. 141a flows out. The motor 1 forms a cooling channel in its own structure that communicates with the external environment, and the overall structure is simple, compact and occupies a small space.

The specific structure of the motor 1 provided by the embodiment of the present invention will be described in further detail below with reference to FIGS. 1 and 2 .

As shown in FIGS. 1 and 2 , the rotor bracket 13 includes a first annular plate 133 extending in the axial direction, and first and second rotor end plates 131 and 132 disposed at both axial ends of the first annular plate 133 , The first rotor end plate 131 is provided with a first air inlet 13a, and the rotor bracket 13 is connected to the stator bracket 14 through a dynamic sealing through the second rotor end plate 132 . For the permanent magnet motor, the rotor yoke is located on the side of the first annular plate 133 facing the stator 11 .

The stator bracket 14 includes a radially extending support plate 143, a first support plate 141 and a second support plate 142 connected with the support plate 143, and a first cavity 14a is formed between the first support plate 141 and the stator 11; the second The support plate 142 is located radially inward of the first support plate 141 , and the second support plate 142 , the first support plate 141 and the support plate 143 form a second chamber 14 b .

Specifically, the first bracket plate 141 includes a second annular plate 1413 extending in the axial direction, a first stator end plate 1411 and a second stator end plate 1411 located at both axial ends of the second annular plate 1413 and extending radially outward. The stator end plate 1412, the first connecting plate 1414 connected with the first stator end plate 1411 and extending in the axial direction, the second connecting plate 1415 connected with the second stator end plate 1412 and extending in the axial direction, the second annular The plate 1413 is connected to the support plate 143 , the first connecting plate 1414 and the second connecting plate 1415 respectively support the two axial ends of the stator 11 , the second annular plate 1413 , the first stator end plate 1411 , and the second stator end plate 1412 are connected to the stator 11 . The stator 11 encloses a first chamber 14a.

Further, a channel communicating with the first ventilation chamber A1 is formed between the first connecting plate 1414 and the first rotor end plate 131 .

The second connecting plate 1415 is connected to the second rotor end plate 132 in a dynamic and sealing manner, and the side of the second bracket plate 142 , the supporting plate 143 and the first bracket plate 141 facing the second connecting plate 1415 forms a second cavity 14b.

The supporting plate 143 is provided with a second air inlet 142a communicating with the second chamber 14b, and the second connecting plate 1415 is provided with a second air outlet 142b communicating with the second ventilation chamber A2.

The number of the first chambers 14a is multiple, and the multiple first chambers 14a are spaced apart and communicated with each other along the circumferential direction of the stator bracket 14, wherein the second annular plate 1413 of at least one of the first chambers 14a is provided with a first chamber. The air outlet 141a and the radial inner side of the remaining first chambers 14a are provided with second chambers 14b.

It should be noted that although the above description takes the motor 1 as the outer rotor and the inner stator structure as an example for the convenience of description, it should be understood that, according to the exemplary embodiment of the present invention, the above-mentioned working principle of motor cooling is also applicable For motors with inner rotor and outer stator structures, no further description will be given.

FIG. 3 is a schematic structural diagram of a wind turbine according to an embodiment of the present invention, and FIG. 4 is an enlarged structural schematic diagram of area B in FIG. 3 .

Please refer to FIG. 3 and FIG. 4 together, an embodiment of the present invention further provides a wind power generator set, including: the aforementioned motor 1 , an impeller 2 and a nacelle 3 . The power of the wind turbine can be in the megawatt level, and the motor 1 can be a permanent magnet external rotor synchronous generator.

Both ends of the motor 1 along its axial direction have opposite windward sides and leeward sides, and the first air inlet 13a of the motor 1 is located on the windward side.

The impeller 2 is located on the windward side of the motor 1 and is arranged coaxially with the motor 1 , and the impeller 2 drives the motor 1 to rotate.

The nacelle 3 is located on the leeward side of the motor 1. The nacelle 3 is provided with a vent 32 and a vent 31. One end of the vent 31 communicates with the first air outlet 141a of the motor 1, and the other end communicates with the vent 32.

The wind power generator set provided by the embodiment of the present invention uses the aforementioned motor 1 to generate electricity, which not only captures the kinetic energy of the wind to convert it into electrical energy, but also fully taps the heat transport potential of the wind. Through the structure of the main body of the motor 1 and the structure of the nacelle 3, a passive air-cooled cooling channel can be constructed by using the external air flow as a cooling medium, so as to realize the cooling of the motor 1. Since there is no separate cooling equipment dedicated to cooling the motor 1, the self-consumption of the unit itself is reduced, the number of components of the entire wind turbine is less, the cost of the whole machine and the load of the whole machine are reduced, the cost is lower, and the performance of the wind turbine is improved. reliability and maintainability.

Further, the impeller 2 includes a hub 21, blades 22 arranged on the hub 21, and a shroud 23 arranged on the outer peripheral side of the hub 21, between the shroud 23 and the rotor support 13 of the motor 1, and between the shroud 23 and the blades Air-permeable seals 4 are respectively arranged between 22 .

The air deflector 23 has an annular thin-walled structure, and its structure conforms to the aerodynamic streamline shape, which can guide the flow direction of the outside air. The breathable seal 4 can protect the incoming air from dust, sand, rain, etc., which effectively avoids the low protection level when the motor of the existing wind turbine adopts the passive air-cooling cooling method, and the inside of the motor due to rain, smoke and dust. The problem of high failure rate caused by the influence of harsh environmental stress, especially suitable for high altitude, dry and low temperature areas.

In this way, the outside air is guided to the connection between the shroud 23 and the motor 1 and the connection between the shroud 23 and the blade 22 under the guiding action of the shroud 23, and passes through the connection The air-permeable seal 4 at the air-permeable seal 4 enters the interior of the shroud 23, and the clean airflow after dust removal, sand removal or dehumidification by the air-permeable seal 4 enters the interior of the motor 1 through the first air inlet 13a of the motor 1, and takes away the heat generated by the motor 1. The first air outlet 141a enters the air passage 31 of the engine room 3, and the heat is diffused into the external environment from the air outlet 32, thereby completing the cooling of the motor 1.

In addition, the motor according to the above-described exemplary embodiments can also be applied to various equipments that need to install the motor, not limited to the wind turbine.

While the invention has been described with reference to the preferred embodiments, various modifications may be made and equivalents may be substituted for parts thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any manner. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (10)

1. A motor (1), characterized in that, comprising: a stator (11), comprising radial passages (11a) spaced apart along its own axis; a rotor (12), arranged coaxially with the stator (11), and an air gap (A) is radially formed between the rotor (12) and the stator (11); a rotor support (13), the rotor (12) is fixed on the rotating shaft through the rotor support (13), and a first air inlet (13a) is provided at one end of the rotor support (13) along the axial direction; a stator support (14), the stator (11) is fixed on a fixed shaft (15) through the stator support (14), and a bearing (16) is provided between the rotating shaft and the fixed shaft (15); The stator bracket (14) is connected with the rotor bracket (13) in a dynamic and sealing manner to form a first ventilation chamber ( A1) and a second ventilation chamber (A2), the first air inlet (13a) communicates with the first ventilation chamber (A1); the stator bracket (14) is also provided with mutually different A first chamber (14a) and a second chamber (14b) are communicated, the first chamber (14a) is communicated with the radial channel (11a), and the first chamber (14a) is provided with a first chamber (14a) an air outlet (141a); the second chamber (14b) is located at the radial inner side of the first chamber (14a), and the second chamber (14b) is provided with a second air inlet (142a) and a second air outlet (142b), and the second air outlet (142b) communicates with the second ventilation chamber (A2); Wherein, the first ventilation chamber (A1), the second ventilation chamber (A2), the air gap (A), the radial channel (11a), the first chamber (14a) and the second chamber (14b) passes through the first air inlet (13a), the second air inlet (142a), the second air outlet (142b) and the first air outlet (141a) A cooling channel that communicates with the external environment is formed. 2. The motor (1) according to claim 1, wherein the rotor support (13) comprises a first annular plate (133) extending in the axial direction and a first annular plate (133) disposed on the first annular plate (133) The first rotor end plate (131) and the second rotor end plate (132) at both ends in the axial direction, the first rotor end plate (131) is provided with the first air inlet (13a), the rotor support (13) Dynamic sealing connection with the stator bracket (14) through the second rotor end plate (132); The rotor includes a rotor magnetic yoke and magnetic poles arranged on the rotor magnetic yoke, and the rotor magnetic yoke is located on the side of the first annular plate (133) facing the stator (11). 3 . The motor ( 1 ) according to claim 2 , wherein the stator bracket ( 14 ) comprises a support plate ( 143 ) extending in a radial direction, and a first bracket connected with the support plate ( 143 ). 4 . a plate (141) and a second bracket plate (142), the first chamber (14a) is formed between the first bracket plate (141) and the stator (11); the second bracket plate (142) ) is located at the radial inner side of the first support plate (141), and the second support plate (142), the first support plate (141) and the support plate (143) form the second cavity chamber (14b). 4. The motor (1) according to claim 3, wherein the first support plate (141) comprises a second annular plate (1413) extending in the axial direction, and the second annular plate (1413) is located on the second annular plate (1413). ) and the first stator end plate (1411) and the second stator end plate (1412) extending radially outward at both ends in the axial direction, and the first stator end plate (1411) connected with the first stator end plate (1411) and extending along the axis A first connecting plate (1414) extending in the direction, a second connecting plate (1415) connecting with the second stator end plate (1412) and extending in the axial direction, the second annular plate (1413) and the support The plates (143) are connected, the first connecting plate (1414) and the second connecting plate (1415) respectively support the two axial ends of the stator (11), the second annular plate (1413), the second annular plate (1413), the The stator end plate (1411), the second stator end plate (1412) and the stator (11) are enclosed to form the first chamber (14a). 5. The motor (1) according to claim 4, characterized in that, a connection with the first ventilation chamber (1414) is formed between the first connecting plate (1414) and the first rotor end plate (131). A1) Connected channels. 6 . The motor ( 1 ) according to claim 4 , wherein the second connecting plate ( 1415 ) is connected with the second rotor end plate ( 132 ) in a dynamic seal, and the second bracket plate ( 132 ) 142), the supporting plate (143) and the side of the first support plate (141) facing the second connecting plate (1415) form the second cavity (14b). 7. The motor (1) according to claim 4, wherein the support plate (143) is provided with the second air inlet (142a) communicating with the second chamber (14b), The second air outlet (142b) communicated with the second ventilation chamber (A2) is provided on the second connecting plate (1415). 8. The motor (1) according to any one of claims 4 to 7, wherein the number of the first chambers (14a) is plural, and the plurality of the first chambers (14a) are along the The stator brackets (14) are distributed at intervals and communicate with each other, wherein the second annular plate (1413) of at least one of the first chambers (14a) is provided with the first air outlet (141a) , and the second chamber (14b) is provided on the radial inner side of the remaining first chambers (14a). 9. A wind turbine, characterized in that, comprising: The motor (1) according to any one of claims 1-8, wherein the motor (1) has opposite windward sides and leeward sides along its axial direction, and the first air inlet ( 13a) on said windward side; The impeller (2) is located on the windward side of the motor (1) and is coaxial with the motor (1), and the impeller (2) drives the motor (1) to rotate; and A nacelle (3) is located on the leeward side of the motor (1), a vent (32) and a ventilation duct (31) are provided in the nacelle (3), and one end of the ventilation duct (31) is connected to the The first air outlet (141a) of the motor (1) communicates with the air outlet (32) at the other end. 10. The wind turbine according to claim 9, wherein the impeller (2) comprises a hub (21), blades (22) arranged on the hub (21), and blades (22) arranged on the hub (21). 21) The shroud (23) on the outer peripheral side, between the shroud (23) and the rotor bracket (13) of the motor (1) and between the shroud (23) and the blade (22) ) are respectively provided with air-permeable seals (4).

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