CN116207881A - Stator, generator and wind generating set - Google Patents

Abstract

The application relates to a stator, generator and wind generating set, the stator includes: the stator bracket comprises a ring-shaped bracket body and guide strips, wherein the bracket body comprises a plurality of fixing strips which are distributed at intervals along the circumferential direction of the bracket body, vent holes which are communicated with the inside of the bracket body are arranged between two adjacent fixing strips, the guide strips are multiple in number and are respectively detachably connected with the fixing strips, and the extending direction of the guide strips is inclined relative to the axial direction; the punching assembly comprises a plurality of punching units, each group of slot units communicated in the axial direction form a stator slot, the stator slot is communicated with the vent hole, a clamping slot is formed in one side of the radial outer side of each punching unit, which faces the guide strip, and each punching unit is matched with the guide strip in a clamping manner through the clamping slot, so that the extending direction of the stator slot is inclined relative to the axial direction. The stator support and the punching sheet component are reliably connected, the heat dissipation effect is good, and the detachment phenomenon cannot occur due to the influence of temperature.

Description

Stator, generator and wind generating set

Technical Field

The application relates to the technical field of wind power, in particular to a stator, a generator and a wind generating set.

Background

Torque ripple of a generator or motor is an important indicator of the measurement of the generator or motor. There are two common means of reducing torque ripple, one by winding wire and the other by mechanical means, such as rotor ramps or stator slots.

Most of the existing stator chute forming modes are welding modes, a plurality of punching sheets and structures for connecting the punching sheets are welded together to form an iron core, and then the punching sheets of the iron core are embedded with a stator bracket in a hot sleeve mode. The mode has poor heat dissipation effect, and the iron core is easy to generate thermal expansion deformation in the running process, so that the generator is separated from the stator bracket due to thermal expansion in the running process when the generator is in the structure form of the inner stator.

Disclosure of Invention

The embodiment of the application provides a stator, generator and wind generating set, is connected reliably between stator support and the punching sheet subassembly of stator, and the radiating effect is good, can not receive the temperature to influence and take place to break away from the phenomenon.

In one aspect, according to an embodiment of the present application, there is provided a stator including: the stator bracket comprises a ring-shaped bracket body and guide strips, wherein the bracket body comprises a plurality of fixing strips which are distributed at intervals along the circumferential direction of the bracket body, vent holes which are communicated with the inside of the bracket body are arranged between two adjacent fixing strips, the guide strips are a plurality of and are respectively detachably connected with the fixing strips, and the extending direction of the guide strips is inclined relative to the axial direction of the bracket body; the stator assembly is arranged on the stator support, the stator assembly comprises a plurality of stator units, the stator units are formed on one side, deviating from the guide strip, of the support body in the radial direction, a plurality of groove units are distributed at intervals along the circumferential direction, the stator units are stacked along the axial direction of the support body, each group of groove units communicated in the axial direction form a stator groove, the stator grooves are communicated with the vent holes, clamping grooves are formed on one side, facing the guide strip, of the radial outer side of each stator unit, and each stator unit is matched with the guide strip in a clamping mode through the clamping grooves, so that the extending direction of each stator groove is inclined relative to the axial direction.

According to one aspect of the embodiment of the application, a plurality of first holes distributed along the axial direction at intervals are arranged on the fixing strip, a plurality of second holes are arranged on the guide strip, each second hole and one of the first holes are oppositely arranged in the radial direction and are mutually connected, the guide strip is provided with a first side face and a second side face which are oppositely arranged in the circumferential direction, and the absolute value of the difference between the distance of the first side face of at least one second hole from the center of the second hole and the distance of the first side face from the center of the second hole is larger than zero.

According to one aspect of the embodiment of the application, the cross section of the guide strip along the self extending direction is dovetail-shaped, the area of one side of the guide strip facing the punching sheet assembly in the radial direction is larger than the area of one side far away from the punching sheet assembly, and the shape of the clamping groove is matched with the cross section shape of the guide strip and matched with the cross section shape of the guide strip in a clamping mode.

According to one aspect of the embodiments of the present application, the stator support further includes positioning plates disposed in pairs and connected to the support body, the positioning plates disposed in pairs being axially spaced apart, and the punching assembly being clamped between the positioning plates disposed in pairs.

According to an aspect of this application embodiment, the punching sheet subassembly still includes adapting unit, and adapting unit includes connecting rod and locking cap, and the connecting rod extends along the axial, is provided with the bar hole on the punching sheet unit, and the bar hole of two adjacent punching sheet units overlaps in axial part, and the connecting rod is pegged graft in the bar hole and can be at the downthehole circumference removal of bar, and locking cap is connected with the connecting rod and is supported and presses at the locating plate.

According to one aspect of the embodiment of the application, the number of the strip-shaped holes on each punching unit is multiple and the strip-shaped holes are distributed at intervals in the circumferential direction, and a connecting part is arranged in each strip-shaped hole of each punching unit.

According to one aspect of the embodiment of the application, the number of the clamping grooves on each punching sheet unit is multiple, the clamping grooves are distributed at intervals in the circumferential direction, each clamping groove is matched with one of the guide strips in a clamping manner, and the strip-shaped holes and the clamping grooves are alternately arranged in the circumferential direction.

According to an aspect of the embodiments of the present application, the positioning plate is an annular structure and is disposed around an axis of the bracket body, and the positioning plate protrudes from the bracket body in a radial direction of the bracket body.

According to one aspect of the embodiment of the application, the surface of the guide strip facing the punching unit in the radial direction is an arc-shaped surface, and the circle center is coincident with the circle center of the bracket body.

According to an aspect of the embodiment of the application, the punching sheet assembly further comprises cushion block groups, a plurality of cushion block groups distributed at intervals along the circumferential direction are arranged between at least two adjacent punching sheet units, and through grooves are formed between two adjacent cushion block groups so as to be communicated with the vent holes and the stator grooves.

According to one aspect of an embodiment of the present application, the pad group is a block-shaped structure extending a predetermined length in the circumferential direction.

According to one aspect of the embodiments of the present application, the stent body has an inner annulus and an outer annulus in a radial direction, and the punch assembly is disposed on either the inner annulus or the outer annulus.

According to one aspect of the embodiment of the present application, the punching units are in an arc-shaped sheet shape extending along the circumferential direction, the number of the punching assemblies is plural, and the plural punching assemblies are distributed at intervals or sequentially along the circumferential direction.

According to one aspect of an embodiment of the present application, the die units are in a closed ring shape extending in a circumferential direction, and the number of die assemblies is one and disposed around the axis of the holder body.

In another aspect, according to an embodiment of the present application, there is provided a generator including: and the rotor is coaxially arranged with the stator and is in running fit with the rotor.

In yet another aspect, according to an embodiment of the present application, a wind generating set is provided, including the generator described above.

According to the stator, generator and wind generating set that this application embodiment provided, the stator includes stator support and towards the piece subassembly, the stator support includes support body and gib block, the stator support includes along self circumference interval distribution's fixed strip, be connected with the gib block on every fixed strip, each towards piece unit range upon range of setting of piece subassembly and all through joint groove and gib block cooperation of gib block, because the extending direction of gib block sets up for the axial slope of stator support, make each towards piece unit of piece subassembly be connected the back with the gib block, each towards every group of slot unit that the piece unit is linked together in the axial forms stator slot extending direction and sets up for the axial slope, satisfy stator chute's demand, can reduce the torque fluctuation of the generator that the stator used, owing to adopt mechanical connection locate mode, make the stator can not receive the temperature influence and take place to break away from the phenomenon.

And the guide strip is detachably connected with the fixed strip, so that the corresponding guide strip can be selected according to the inclination angle required by the stator groove, and the universality of the stator support is improved. Meanwhile, as the vent hole communicated with the inside of the bracket body is arranged between the two adjacent fixing strips, the stator groove is communicated with the vent hole, so that heat dissipation of the punching sheet assembly is facilitated, damage to the stator due to overhigh temperature is avoided, and the service life of the whole stator is prolonged.

Drawings

Features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic structural view of a wind turbine generator system according to one embodiment of the present application;

FIG. 2 is a schematic structural diagram of a generator according to one embodiment of the present application;

FIG. 3 is a partial schematic view of a generator according to one embodiment of the present application with end caps removed;

FIG. 4 is a schematic structural view of a stator according to one embodiment of the present application;

FIG. 5 is a cross-sectional view taken along the direction A-A in FIG. 4;

FIG. 6 is a schematic structural view of a stator frame according to one embodiment of the present application;

fig. 7 is an enlarged view at B in fig. 6;

FIG. 8 is a partial schematic view of a stator frame according to one embodiment of the present application;

FIG. 9 is an enlarged view of FIG. 8 at C;

FIG. 10 is a schematic structural view of a die unit according to one embodiment of the present application;

FIG. 11 is a partial schematic structural view of a stator according to an embodiment of the present application;

FIG. 12 is a schematic view of the structure of a punch assembly according to one embodiment of the present application;

FIG. 13 is a cross-sectional view taken along the direction D-D in FIG. 12;

FIG. 14 is a cross-sectional view taken along the direction E-E in FIG. 12;

FIG. 15 is a cross-sectional view taken along the direction F-F in FIG. 12;

FIG. 16 is an enlarged view at G of FIG. 12;

fig. 17 is a schematic structural view of a generator according to another embodiment of the present application.

Wherein:

a 1-generator;

100-stator; 10-a stator support; 11-a stent body; 111-fixing strips; 111 A-A first hole; 112-vent holes; 113-an inner annulus; 114-an outer annulus; 12-guiding strips; 121-a second hole; 122-a first side; 123-second side; 13-positioning plates;

20-a punching assembly; 21-a punching unit; 211-a tank unit; 212-clamping grooves; 213-bar-shaped holes; 21 a-teeth; 21 b-a yoke; 22-connecting parts; 221-connecting rods; 222-locking cap; 23-cushion block groups; 231-through groove; 24-stator slots;

30-a fastener;

200-rotor;

2-tower; 3-nacelle; 4-impeller; 401-a hub; 402-leaf;

x-circumferential direction; y-radial; z-axis.

In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.

Detailed Description

Features and exemplary embodiments of various aspects of the present application 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 application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing an example of the present application. 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 application; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The directional terms appearing in the following description are all directions shown in the drawings and are not intended to limit the specific structures of the stator, generator, and wind turbine of the present application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected. The specific meaning of the terms in the present application can be understood as appropriate by one of ordinary skill in the art.

Referring to fig. 1, an embodiment of the present application provides a wind generating set, including a tower 2, a nacelle 3, a generator 1, and an impeller 4. The tower 2 is connected to a fan foundation, the nacelle 3 is arranged at the top end of the tower 2, and the generator 1 is arranged at the nacelle 3. In some examples, the generator 1 may be located outside the nacelle 3, although in some examples the generator 1 may also be located inside the nacelle 3. The impeller 4 comprises a hub 401 and a plurality of blades 402 connected to the hub 401, the impeller 4 being connected to the generator 1 by its hub 401.

Referring to fig. 1 to 3, the embodiment of the present application further provides a generator 1, where the generator 1 includes a rotor 200 and a stator 100, the rotor 200 is coaxially disposed with the stator 100 and is in running fit, a hub 401 may be specifically connected with the rotor 200 of the generator 1, and when wind acts on the blades 402, the whole impeller 4 and the rotor 200 of the generator 1 are driven to rotate, so as to further meet the power generation requirement of the wind turbine generator set.

Torque ripple of the generator 1 is an important indicator for measuring the generator 1. It has been verified that torque ripple can be reduced by mechanical means, such as by means of a chute in the stator 100.

In most of the conventional stator chute forming methods, a plurality of lamination units are welded to a structure for connecting lamination to form a core, and then lamination units of the core are fitted to a stator frame 10 by a shrink fit method. The heat dissipation effect is poor, the iron core is easy to generate thermal expansion deformation in the running process, and when the generator 1 is in the structure form of an inner stator, the generator can be separated from the stator bracket 10 in running due to thermal expansion.

In order to solve the above technical problems, the present embodiment further provides a stator 100, wherein the stator support of the stator 100 is reliably connected with the punching assembly, and has a good heat dissipation effect, and is not affected by temperature to generate a detachment phenomenon, and the stator 100 can be manufactured and sold as an independent component, and of course, can also be used for the generator 1 provided by the above implementation and as a component of the generator 1.

For a better understanding of the present application, the stator 100 and the generator 1 according to the embodiment of the present application are described in detail below with reference to fig. 4 to 17.

Referring to fig. 4 and 10, the stator 100 provided in this embodiment of the present application includes a stator support 10 and a punching assembly 20, the stator support 10 includes a support body 11 and guide strips 12, the support body 11 includes a plurality of fixing strips 111 distributed along the circumferential direction X of the support body at intervals, a vent 112 communicating with the interior of the support body 11 is provided between two adjacent fixing strips 111, the number of the guide strips 12 is a plurality of and detachably connected with the fixing strips 111, and the extending direction of the guide strips 12 is inclined relative to the axial direction Z of the support body 11. The punching assembly 20 is arranged on the stator bracket 10, the punching assembly 20 comprises a plurality of punching units 21, a plurality of groove units 211 are formed on one side, away from the guide strip 12, of the punching units 21 in the radial direction Y of the bracket body 11, the plurality of groove units 211 are distributed at intervals along the circumferential direction X, the plurality of punching units 21 are overlapped along the axial direction Z of the bracket body 11, each group of groove units 211 communicated with each punching unit 21 in the axial direction Z form a stator groove 24, the stator grooves 24 are communicated with the vent holes 112, a clamping groove 212 is formed on one side, facing the guide strip 12, of the radial direction Y of the punching units 21, and each punching unit 21 is matched with the guide strip 12 in a clamping way through the clamping groove 212 so that the extending direction of the stator grooves 24 is obliquely arranged relative to the axial direction Z.

Alternatively, the number of the fixing bars 111 included in the stator frame 10 is not particularly limited, and may be two, three or more, with the vent holes 112 formed between the adjacent two fixing bars 111, the vent holes 112 being provided through the wall portion of the frame body 11 in the radial direction Y of the frame body 11 so as to communicate with the inside of the frame body 11.

Alternatively, the number of guide strips 12 may be equal to the number of fixing strips 111, or may be less than the number of fixing strips 111, and each guide strip 12 is detachably connected to one of the fixing strips 111. For example, the connection can be detachable by means of bolt fastening, screw fastening or pin positioning connection.

Alternatively, the inclination angle of the guide bar 12 is not particularly limited, and may be set according to the inclination angle of the stator groove 24.

Alternatively, a plurality of slot units 211 are formed on one side of each punching unit 21 facing away from the guide bar 12 in the radial direction Y of the support body 11, the number of slot units 211 formed by each punching unit 21 is the same, and correspondingly disposed slot units 211 of each punching unit 21 are communicated to form the stator slot 24 in the axial direction Z.

For example, each of the punching units 21 includes n slot units 211, n is an integer greater than or equal to 3, the slot unit 211 at the same end in the circumferential direction X is the first slot unit, the last slot unit 211 is the nth slot unit, the first slot unit of each of the punching units 21 is sequentially communicated in the axial direction Z to form one of the stator slots 24, the second slot unit of each of the punching units 21 is sequentially communicated in the axial direction Z to form the other stator slot 24, and so on, and the nth slot unit 211 of each of the punching units 21 is sequentially communicated in the axial direction Z to form the nth stator slot 24.

Alternatively, the stator slot 24 being in communication with the vent hole 112 means that the cooling fluid passing through the vent hole 112 can be in contact with the stator slot 24, for example, when the generator 1 is an outer stator generator, the cooling fluid outside the generator 1 can enter the inside of the holder body 11 through the vent hole 112 and be in contact with the stator slot 24. When the generator 1 is an internal stator generator, the cooling air flow entering from the inside of the stator 100 can pass through the air vent 112 to the outside of the stator frame 10 and contact the stator slots 24.

Alternatively, the clamping groove 212 on the punching unit 21 is matched with the clamping of the fixing strip 111, for example, the fixing strip 111 may partially extend into the clamping groove 212 of the punching unit 21 and be connected with the clamping groove 212 in a clamping manner.

According to the stator 100 provided by the embodiment of the application, the stator support 10 includes the fixed strips 111 distributed along the circumferential direction X at intervals, each fixed strip 111 is connected with the guide strip 12, each punching unit 21 of the punching assembly 20 is stacked and arranged and is matched with the guide strip 12 in a clamping manner through the clamping grooves 212, after each punching unit 21 of the punching assembly 20 is connected with the guide strip 12 due to the inclined arrangement of the extending direction of the guide strip 12 relative to the axial direction Z of the stator support 10, each group of groove units 211 communicated with each punching unit 21 in the axial direction Z form the inclined arrangement of the extending direction of the stator groove 24 relative to the axial direction Z, the requirement of the stator chute is met, the torque fluctuation of the generator 1 applied to the stator 100 can be reduced, and the stator 100 cannot be separated due to the fact that the mechanical connection positioning mode is adopted.

In addition, the guide strips 12 and the fixing strips 111 are detachably connected, and the corresponding guide strips 12 can be selected according to the inclination angle required by the stator grooves 24, so that the universality of the stator support 10 is improved.

Further, in the lamination process of the sheet units 21, since the sheet units 21 need to be shaped, especially the relative position between the clamping groove 212 of the previous sheet unit 21 and the clamping groove 212 of the next sheet unit 21 is very high, corresponding tools are required to perform accurate lamination. If not removable, it is difficult to ensure the relative position between the last 21 and the next 21 die units. Therefore, the premise of irremovable is that the whole punching unit 21 is laminated to form the punching assembly 20 on the premise of high precision, then the fixing strip 111 is mounted in the clamping groove 212 to fix, and the relative positions of the punching units 21 are ensured, then the punching units are lifted from the fixture and put on the stator frame 10 to be welded and fixed. This is difficult to implement in large diameter generators because the lamination unit 21 is lifted after being fixed, and because of the large diameter and heavy weight, it is easily deformed, making the lamination assembly 20 unable to fit into the stator frame.

If the stator frame is detachable, the stator frame 10 can be directly laminated, and due to the detachable guide strips 12, the guide strips 12 are not directly screwed with the fixing strips 111 to be fixed in the lamination process of the punching unit 21, so that the position of the guide strips 12 can be adjusted at any time in the lamination process of the punching unit 21. The positions of the guide strips 12 and the fixing strips 111 can be completely shortened after the integral lamination is completed. The relative positions of each guide bar and the clamping grooves 212 of the punching units 21 are ensured, the matching of the guide bars and the clamping grooves is ensured, and the lamination of each punching unit 21 of the punching assembly 20 is facilitated.

Meanwhile, as the vent holes 112 communicated with the inside of the bracket body 11 are arranged between the two adjacent fixing strips 111, the stator grooves 24 are communicated with the vent holes 112, so that the heat dissipation of the punching assembly 20 is facilitated, the stator 100 is prevented from being damaged due to overhigh temperature, and the overall service life of the stator 100 is prolonged.

In some alternative embodiments, in the stator 100 provided in the embodiments of the present application, the whole bracket body 11 may be a cylindrical structure, a plurality of ventilation holes 112 are formed in the circumferential direction X of the bracket body 11 at intervals, and a guide strip 12 is formed between the rest of two adjacent ventilation holes 112. The guide strip 12 and the rest part of the bracket body 11 can be in an integrated structure, which is beneficial to the molding of the bracket body 11.

Alternatively, the fixing bar 111 may be a bar-shaped structure extending in the axial direction Z of the bracket body 11, which can improve the rigidity of the bracket body 11 as a whole. Alternatively, the shape of the vent 112 may be rectangular or in a shape of a waist, or the like, and may be in a shape of a waist, so that the wall of the vent 112 is a smooth transition surface, which is advantageous for the through hole of the cooling air flow.

Referring to fig. 4 to 10, as an alternative embodiment, the fixing strip 111 is provided with a plurality of first holes 111a spaced along the axial direction Z, the guide strip 12 is provided with a plurality of second holes 121, each second hole 121 is disposed opposite to one of the first holes 111a in the radial direction Y and is connected to the other, the guide strip 12 has a first side 122 and a second side 123 disposed opposite to each other in the circumferential direction X, and an absolute value of a difference between a distance a of the first side 122 of at least one second hole 121 from a center of the second hole 121 and a distance b of the second side 122 from the center of the same second hole 121 is greater than zero. Through the arrangement, the requirement of detachable connection between the guide strip 12 and the corresponding fixing strip 111 can be met, and meanwhile, the requirement of the inclination angle of the extending direction of the guide strip 12 relative to the axial direction Z can be met by aligning the second holes 121 with the corresponding first holes 111 a.

Referring to fig. 7 to 13, in some alternative embodiments, the guide bar 12 and the fixing bar 111 may be connected by a fastener 30, for example, a bolt or a screw may be used, one of the first hole 111a and the second hole 121 may be provided as a screw hole, and the fastener 30 is inserted through the other of the first hole 111a and the second hole 121 and is screwed with the first hole 111a or the second hole 121 to achieve the detachable connection between the guide bar 12 and the fixing bar 111.

As an alternative embodiment, one of the first hole 111a and the second hole 121 may be a threaded hole and the other may be a stepped hole, so that the nut of the fastener 30 may be sunk into the stepped hole without affecting the fit of the die assembly 20 with the guide bar 12 or the appearance of the holder body 11 by the above arrangement.

In some alternative embodiments, the guide bar 12 has a dovetail-shaped cross section along the extension direction, and the area of the side of the guide bar 12 facing the punch assembly 20 in the radial direction Y is larger than the area of the side facing away from the punch assembly 20, and the shape of the clamping groove 212 matches and is in clamping engagement with the cross-sectional shape of the guide bar 12. Through the arrangement, the guide strip 12 and the punching assembly 20 are limited in the radial direction Y of the bracket body 11, and separation of the guide strip and the punching assembly in the radial direction Y is avoided.

As an alternative implementation manner, in the stator 100 provided in this embodiment of the present application, the surface of the guide strip 12 facing the punching unit 21 in the radial direction Y is an arc surface, and the center of the circle coincides with the center of the circle of the support body 11. Through the above arrangement, when the inclination angle of the stator slot 24 is large, the inclination angle can be adapted, and lamination of the punching assembly 20 is facilitated.

With continued reference to fig. 7-13, in some alternative embodiments, the stator 100 provided in the embodiments of the present application, the stator support 10 further includes positioning plates 13 disposed in pairs and connected to the support body 11, the positioning plates 13 disposed in pairs being spaced apart in the axial direction Z, and the punching assembly 20 being clamped between the positioning plates 13 disposed in pairs. Through setting up locating plate 13, can carry out spacingly to locating plate 13 in the axial Z of support body 11, avoid a plurality of punching units 21 to take place the drunkenness in axial Z after stacking, guarantee the security performance of punching unit 21.

As an alternative embodiment, the positioning plate 13 is arranged protruding from the holder body 11 in the radial direction Y of the holder body 11 and the orthographic projection of the positioning plate 13 in the axial direction Z of the holder body 11 covers at least part of the punch unit 21 to facilitate the limiting of the punch assembly 20 in the axial direction Z. In addition, the stator 100 plates are arranged to facilitate the overall strength of the stator frame 10.

In some alternative embodiments, the stator 100 provided in the embodiments of the present application may be connected between the positioning plate 13 and the bracket body 11 by a fixed connection, for example, by welding or by integrally forming. So as to ensure the connection strength between the positioning plate 13 and the bracket body 11. Of course, the fixing connection between the positioning plate 13 and the bracket body 11 is only an alternative embodiment, and in some other embodiments, the positioning plate 13 and the bracket body may be connected to each other by a detachable connection, for example, by a bolt fastening manner, so long as the requirement of limiting the opposite punching assembly 20 in the axial direction Z can be guaranteed.

In some alternative embodiments, the positioning plate 13 is an arc plate extending a predetermined length along the circumferential direction X, and the positioning plate 13 protrudes from the support body 11 in the radial direction Y of the support body 11, may protrude inward, may protrude outward, and protrudes inward when the punching sheet assembly 20 is disposed on the inner side of the support body 11, and protrudes outward when disposed on the outer side of the support body 11. The extension length of the positioning plate 13 in the circumferential direction X may be specifically set according to the extension length of the corresponding punching assembly 20 in the circumferential direction X, so long as the limiting effect of each punching unit 21 of the opposite punching assembly 20 can be ensured.

It will be appreciated that the above-described configuration of the positioning plate 13 is an alternative embodiment, and in some other examples, the positioning plate 13 may be an annular structure and disposed around the axis of the bracket body 11, where the positioning plate 13 protrudes from the bracket body 11 in the radial direction Y of the bracket body 11. The positioning plate 13 is configured as described above, and is capable of positioning each of the punch units 21 of the punch assembly 20 located at an arbitrary position in the circumferential direction X in the axial direction Z.

With continued reference to fig. 7 to 13, as an alternative implementation manner, the stator 100 provided in this embodiment of the present application, the punching sheet assembly 20 further includes a connection member 22, the connection member 22 includes a connection rod 221 and a locking cap 222, the connection rod 221 extends along an axial direction Z, a strip hole 213 is provided on the punching sheet unit 21, the strip holes 213 of two adjacent punching sheet units 21 partially overlap in the axial direction Z, the connection rod 221 is inserted into the strip hole 213 and can move in the strip hole 213 along a circumferential direction X, and the locking cap 222 is connected with the connection rod 221 and abuts against the positioning plate 13.

Through set up bar hole 213 and the bar hole 213 of adjacent two punching units 21 in axial Z partial overlap on punching unit 21 for after each punching unit 21 cooperates with the direction strip 12 that the slope set up, connecting rod 221 can peg graft in each direction punching unit 21 in the bar hole 213 that sets up relatively in axial Z along axial Z, through above-mentioned setting, can connect and be fixed in locating plate 13 with each punching unit 21 through connecting rod 221 and locking cap 222 cooperation, avoid punching unit 21 and direction strip 12 separation under the effect of external force. Meanwhile, when the plurality of punching units 21 of the punching assembly 20 are clamped with the guide strips 12 through the respective clamping grooves 212, the plurality of punching units can rotate along the circumferential direction X according to the inclination angle of the guide strips 12, and cannot be limited by the connecting rods 221, so that the installation requirements of the punching units 21 and the inclination requirements of the stator grooves 24 are ensured.

And, the connecting part 22 that corresponds to setting can compress tightly locating plate 13, guarantees the lamination quality of punching assembly 20, prevents that the tooth from rising too greatly.

Referring to fig. 11 to 15, in some alternative embodiments, the number of the strip-shaped holes 213 on each of the punching units 21 is plural and is distributed at intervals in the circumferential direction X, and the connecting members 22 are disposed in each of the strip-shaped holes 213 of the punching units 21. By making the number of the strip-shaped holes 213 plural, the clamping effect on the plural punching units 21 is ensured, and the lamination quality is optimized.

Alternatively, in fig. 14, the position of the guide bar 12 with respect to the fixing bar 111 is located on the left side, and the connecting bar 221 is located on the right side of the position of the bar hole 213 corresponding to the punching unit 21, at which time the position of the punching unit 21 is rotated counterclockwise by an angle with respect to the fixing bar 111. In fig. 15, corresponding to the cross-sectional position, the position of the guide bar 12 relative to the fixing bar 111 is right, the position of the connecting rod 221 in the bar hole 213 is left, and at this time, the position of the punching unit 21 is rotated clockwise relative to the fixing bar 111 by an angle, and by providing a plurality of bar holes 213, the clamping requirement of the punching unit 21 can be ensured, and at the same time, the rotation requirement of the punching unit 21 when the guide bar 12 is matched can be ensured, which is beneficial to the inclination setting requirement of the stator slot 24.

As an alternative embodiment, in the stator 100 provided in this embodiment, the number of the clamping grooves 212 on each punching unit 21 is multiple, the multiple clamping grooves 212 are distributed at intervals in the circumferential direction X, each clamping groove 212 is in clamping fit with one of the guide strips 12, and the strip-shaped holes 213 and the clamping grooves 212 are alternately arranged in the circumferential direction X. Through the above arrangement, the matching requirements between the guide bar 12 and the connecting component 22 can be ensured, and meanwhile, the impact of the opposite directions of the strip-shaped holes 213 and the clamping grooves 212 in the radial direction Y on the strength of the punching unit 21 is avoided.

As an alternative embodiment, the punching unit 21 may include a yoke 21b and teeth 21a, the yoke 21b is a plate-shaped structure extending in the circumferential direction X, the teeth 21a are strips extending in the radial direction Y, the teeth 21a are plural and are distributed at intervals in the circumferential direction X, each tooth 21a is connected to the yoke 21b, a slot unit 211 is formed between two adjacent teeth 21a, and the stator slot 24 and the strip-shaped hole 213 are provided in the yoke 21b.

As an alternative embodiment, the punching unit 21 provided in the embodiment of the present application is in an arc-shaped sheet shape extending along the circumferential direction X, and the number of the punching assemblies 20 is plural, and the plural punching assemblies 20 are distributed at intervals or sequentially in the circumferential direction X. It will be appreciated that this is an alternative embodiment, and that in some other embodiments, the die units 21 may be formed in a closed loop extending in the circumferential direction X, with the number of die assemblies 20 being one and disposed about the axis of the holder body 11. The functional requirements of the stator 100 can be satisfied as well.

Referring to fig. 16, in some alternative embodiments, the sheet punching unit 21 provided in the present application, the sheet punching assembly 20 further includes a spacer group 23, a plurality of spacer groups 23 distributed at intervals along the circumferential direction X are disposed between at least two adjacent sheet punching units 21, and a through slot 231 is formed between two adjacent spacer groups 23 to communicate the air vent 112 with the stator slot 24. Through setting up cushion group 23 for the cooling air flow that gets into by the ventilation hole can be through leading to the quick entering stator groove 24 of groove 231, does benefit to the heat dissipation of stator 100, guarantees the life-span of stator 100. Alternatively, the pad groups may be block-shaped structures extending a predetermined length in the circumferential direction.

As an alternative embodiment, the stator 100 provided in the embodiment of the present application has the support body 11 with an inner annular surface 113 and an outer annular surface 114 in the radial direction Y, and the punching assembly 20 is disposed on the inner annular surface 113. When the stator 100 of the above-described form is used for the generator 1, the rotor 200 may be provided inside the stator 100, i.e., the generator 1 in the form of an outer stator 100-an inner rotor 200 is formed.

Referring to fig. 17, of course, the arrangement of the lamination assembly 20 on the inner annular surface 113 of the bracket body 11 is an alternative embodiment, and in some other examples, the lamination assembly 20 may be arranged on the outer annular surface 114 of the bracket body 11, and when it is used for the generator 1, the stator 100 may be arranged inside the rotor 200, so as to form the outer rotor 200-inner stator 100 type generator 1.

The stator 100 provided in this embodiment changes the existing welding mode for the inclined design of the stator slot 24, and adopts the guide strip 12 detachably connected with the bracket body 11 and obliquely arranged to be connected with each punching unit 21 of the opposite punching assembly 20 for positioning, so as to ensure the inclined arrangement of the stator slot 24 and reduce the torque fluctuation of the generator 1 applied by the stator 100. The stator 100 is not separated due to temperature influence by adopting a mechanical connection positioning mode. The detachable connection between the guide bar 12 and the fixing bar 111 improves versatility of the stator frame 10. Meanwhile, as the vent holes 112 communicated with the inside of the bracket body 11 are arranged between the two adjacent fixing strips 111, the stator grooves 24 are communicated with the vent holes 112, so that the heat dissipation of the punching assembly 20 is facilitated, the stator 100 is prevented from being damaged due to overhigh temperature, and the overall service life of the stator 100 is prolonged.

The generator 1 and the wind generating set provided by the embodiments of the present application have the advantages of small torque fluctuation, good heat dissipation effect, high safety performance and the like due to the stator 100 provided by the embodiments.

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

Claims (14)

1. A stator (100), characterized by comprising:

the stator support (10), the stator support (10) comprises a support body (11) and guide strips (12) which are annular, the support body (11) comprises a plurality of fixing strips (111) which are distributed at intervals along the circumferential direction (X) of the support body, vent holes (112) which are communicated with the inside of the support body (11) are formed between every two adjacent fixing strips (111), the guide strips (12) are multiple and are respectively detachably connected with the fixing strips (111), and the extending direction of the guide strips (12) is obliquely arranged relative to the axial direction (Z) of the support body (11);

the stator comprises a stator support (10), a punching sheet assembly (20) is arranged on the stator support (10), the punching sheet assembly (20) comprises a plurality of punching sheet units (21), a plurality of groove units (211) are formed on one side, deviating from the guide strip (12), of the support body (11) in the radial direction (Y), the groove units (211) are distributed at intervals in the circumferential direction (X), the punching sheet units (21) are overlapped along the axial direction (Z), each group of groove units (211) communicated with the punching sheet units (21) in the axial direction (Z) form a stator groove (23), the stator groove (23) is communicated with the vent hole (112), a clamping groove (212) is formed on one side, facing the guide strip (12), of the radial direction (Y) of the punching sheet units (21), and each punching sheet unit (21) is matched with the guide strip (12) in a clamping mode through the clamping groove (212) so that the stator groove (23) extends obliquely relative to the axial direction (Z).

2. Stator (100) according to claim 1, characterized in that said fixed bar (111) is provided with a plurality of first holes (111 a) spaced apart along said axial direction (Z), said guide bar (12) is provided with a plurality of second holes (121), each of said second holes (121) being arranged opposite one of said first holes (111 a) in said radial direction (Y) and being interconnected, said guide bar (12) having, in said circumferential direction (X), a first side (122) and a second side (123) arranged opposite each other, the absolute value of the difference between the distance of the first side (122) of at least one second hole (121) from the centre of the second hole (121) and the distance of the first side (122) from the centre of the second hole (121) being greater than zero.

3. The stator (100) of claim 1, wherein the cross section of the guide bar (12) along the self-extending direction is dovetail-shaped, the area of the guide bar (12) facing the punching assembly (20) in the radial direction (Y) is larger than the area of the side far away from the punching assembly (20), and the shape of the clamping groove (212) is matched with the cross section shape of the guide bar (12) and is in clamping fit.

4. Stator (100) according to claim 1, characterized in that the stator frame (10) further comprises positioning plates (13) arranged in pairs and connected to the frame body (11), the positioning plates (13) arranged in pairs being spaced apart in the axial direction (Z), the punch assembly (20) being clamped between the positioning plates (13) arranged in pairs.

5. The stator (100) according to claim 4, wherein the punching assembly (20) further comprises a connecting member (22), the connecting member (22) comprises a connecting rod (221) and a locking cap (222), the connecting rod (221) extends along the axial direction (Z), the punching units (21) are provided with strip-shaped holes (213), the strip-shaped holes (213) of two adjacent punching units (21) partially overlap in the axial direction (Z), the connecting rod (221) is inserted into the strip-shaped holes (213) and can move in the circumferential direction (X) in the strip-shaped holes (213), and the locking cap (222) is connected with the connecting rod (221) and is pressed against the positioning plate (13).

6. The stator (100) according to claim 5, wherein the number of the strip-shaped holes (213) on each of the lamination units (21) is plural and distributed at intervals in the circumferential direction (X), and the connecting members (22) are correspondingly disposed in each of the strip-shaped holes (213) of the lamination units (21).

7. The stator (100) of claim 5, wherein the number of said clamping grooves (212) on each of said lamination units (21) is plural, a plurality of said clamping grooves (212) are spaced apart in said circumferential direction (X), each of said clamping grooves (212) is in clamping engagement with one of said guide bars (12), and said bar-shaped holes (213) are alternately arranged with said clamping grooves (212) in said circumferential direction (X).

8. The stator (100) according to claim 4, wherein the positioning plate (13) is an annular structure and is disposed around the axis of the bracket body (11), the positioning plate (13) protruding from the bracket body (11) in the radial direction (Y) of the bracket body (11);

or, the positioning plate (13) is an arc plate extending for a predetermined length along the circumferential direction (X), and the positioning plate (13) protrudes out of the bracket body (11) in the radial direction (Y) of the bracket body (11).

9. Stator (100) according to any one of claims 1 to 8, characterized in that the surface of the guide strip (12) facing the punching unit (21) in the radial direction (Y) is an arc-shaped surface and the centre of a circle coincides with the centre of a circle of the holder body (11).

10. The stator (100) according to any one of claims 1 to 8, wherein the lamination assembly (20) further comprises a plurality of spacer groups (23) arranged between at least two adjacent lamination units (21) at intervals along the circumferential direction (X), and a through slot (231) is formed between two adjacent spacer groups (23) to communicate the ventilation hole (112) with the stator slot (23).

11. The stator (100) of claim 10, wherein the set of pads (23) is a block-like structure extending a predetermined length along the circumferential direction (X).

12. The stator (100) according to any one of claims 1 to 8, wherein the carrier body (11) has an inner annular surface (113) and an outer annular surface (114) in the radial direction (Y), the punch assembly (20) being disposed on the inner annular surface (113) or the outer annular surface (114).

13. A generator, comprising:

rotor (200)

The stator (100) according to any one of claims 1 to 12, the stator (100) being coaxially arranged and in a running fit with the rotor (200).

14. A wind power plant comprising a generator as claimed in claim 13.

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