CN117477854B - Generator suitable for wind power semi-direct drive unit - Google Patents
Generator suitable for wind power semi-direct drive unit Download PDFInfo
- Publication number
- CN117477854B CN117477854B CN202311804646.0A CN202311804646A CN117477854B CN 117477854 B CN117477854 B CN 117477854B CN 202311804646 A CN202311804646 A CN 202311804646A CN 117477854 B CN117477854 B CN 117477854B
- Authority
- CN
- China
- Prior art keywords
- stator core
- generator
- magnetic
- magnetic pole
- annular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 238000004804 winding Methods 0.000 claims abstract description 11
- 238000009423 ventilation Methods 0.000 claims description 59
- 238000007789 sealing Methods 0.000 claims description 39
- 229910000831 Steel Inorganic materials 0.000 claims description 26
- 239000010959 steel Substances 0.000 claims description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 8
- 230000005855 radiation Effects 0.000 claims description 6
- 238000003475 lamination Methods 0.000 claims description 4
- 238000003491 array Methods 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000010030 laminating Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
- H02K1/148—Sectional cores
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention relates to a generator suitable for a wind power semi-direct drive unit, which comprises a base and a generator body, wherein the generator body is fixedly arranged in an inner cavity of the base, the base comprises a front end cover and a rear end cover which are respectively arranged at the two ends of the generator body in front and back, and the generator body comprises a stator component wound with a winding assembly and a rotor component matched with a rotating shaft of the generator. The motor cooling device is reasonable in structure, can effectively cool the motor body, avoids abnormal turbulence generated in the motor, and guarantees that the bearing of the whole motor structure is more reasonable.
Description
Technical Field
The invention relates to a generator device, in particular to a generator suitable for a wind power semi-direct drive unit.
Background
At present, the main wind power flow technical route is a high-speed doubly-fed scheme and a medium-speed half-direct-drive scheme, and is driven by market price-reduced competitive pressure, so that various manufacturers tend to select a direct-cooling scheme of a generator for further reducing the cost of generator components. A typical semi-direct drive generator scheme is shown in fig. 1-5 of the drawings of the specification. The typical air cooling loop is shown in fig. 4, and is in a typical radial forced ventilation scheme, and the specific path of the air cooling loop is as follows: under the action of negative pressure power generated by the cooling fan and the annular chamber in the engine room, external (cabin) cold air medium is discharged to the atmosphere outside the engine room through the ventilation openings on the two sides of the axial direction of the iron core (generally, for the purpose of environmental protection, a filter box with an air filtering function is generally arranged at the ventilation opening), the winding end part, the air gap, the radial ventilation channel of the iron core, the annular chamber and the cooling fan, and simultaneously, heat generated by the winding end part, the magnetic pole and the iron core in the working state is taken away, so that all parts (mainly the winding, the iron core and the magnetic pole) of the motor reliably operate within the set temperature rise limit value and the service life range of the motor.
However, the existing semi-direct-drive generator product generally has the air cooling problems that the working temperature is increased (for example, the design temperature rise of a stator iron core reaches 120K under the rated working condition, the design working temperature of rotor magnetic steel reaches 80 ℃ and the like), the circumferential and axial different positions of a motor in a working state are excessively large in temperature difference and the like, and the motor performance and the motor quality are reduced due to the problems, so that the problem is to be solved. The main reasons for the above problems are analyzed and verified: 1. when in working state, turbulence is generated when a gap between a rotor bracket wing plate and a magnetic pole (the currently published Chinese patent with the application number of CN202111640601.5 and the application date of 2021.12.29 is a self-adhesive non-uniform diameter modularized rotor structure of a permanent magnet wind driven generator, which discloses a magnetic pole scheme) rotates at a high speed; 2. the annular cavity also has larger flow resistance limited by the stator support structure; 3. the rotor magnetic pole is not provided with a radial ventilation channel, and the cooling is insufficient.
If an empty water cooling system scheme is adopted, the modularization and sea-land type integration is facilitated, but the cost is higher for land application due to the adoption of a water cooling system. The application number of the currently published Chinese patent is: CN201920515138.3, filing date: 2019.04.16, the invention name is: the axial size adjusting plate for the large-scale wind driven generator rotor and the magnetic pole structure and application number are as follows: CN202210906668.7, filing date: 2022.07.29, the invention name is: the rotor, the generator and the wind generating set all attempt to increase radial ventilation at the magnetic poles of the rotor and increase the cooling effect on the magnetic poles; CN201920515138.3 does not take into account the turbulence problem of the wing plates at the rotor support and the problem of the radial ventilation loop of the poles; while CN202210906668.7 considers the turbulence problem of the wing plate at the rotor support and the radial ventilation loop problem of the magnetic poles, in the scheme, the N pole and the S pole in a single magnetic pole module exist at the same time, and the existing magnetizing device cannot perform saturation magnetization on the single magnetic pole module.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a generator suitable for a wind power semi-direct drive unit, which comprises a base and a generator body, wherein the generator body is fixedly arranged in an inner cavity of the base, the base comprises a front end cover and a rear end cover which are respectively arranged at the two ends of the generator body in front and back, and the generator body comprises a stator component wound with a winding assembly and a rotor component matched with a rotating shaft of the generator;
the stator component comprises a plurality of stator core segments, two tooth pressing plates and a plurality of iron core inserting strips, wherein the stator core segments are arranged in a front-to-back array and are fixed through the tooth pressing plates and the iron core inserting strips, namely, the stator core segments, the tooth pressing plates and the iron core inserting strips form a whole, gaps are reserved between the front adjacent stator core segments and the rear adjacent stator core segments, namely, a ventilation loop A is arranged between the front stator core segments and the rear stator core segments, the two tooth pressing plates are respectively attached to end faces of the stator core segments at the front end and the rear end of the stator component, and the winding assembly is wound on the stator core segments;
the rotor component comprises a rotor support and a plurality of magnetic pole modules, the magnetic pole modules are arranged in a front-back array manner to form a magnetic pole array block, a gap, namely a ventilation loop B, is formed between the two adjacent magnetic pole modules in the front-back direction, the magnetic pole array block is annularly arranged on the periphery of the rotor support along the circumferential direction, the rotor support consists of a connecting flange, a cylinder body, an end plate and a magnetic yoke, a plurality of end plate ventilation holes are uniformly formed in the end face of the side of the plate body of the end plate along the circumferential direction, and a plurality of magnetic yoke ventilation holes are uniformly formed in the end face of the magnetic yoke, which is matched with the magnetic pole modules in an installation manner, along the circumferential direction;
the stator component further comprises two end rings, the machine base further comprises annular sealing cover plates, the two end rings are respectively arranged at tooth pressing plates at the front end and the rear end of the generator body, the annular sealing cover plates are arranged between the two end rings, the annular sealing cover plates annularly wrap the generator body, the front end cover and the rear end cover are respectively fixedly arranged at the two ends of the generator body through the end rings corresponding to the front end cover and the rear end cover, at least one group of sealing cover plate vent holes which are oppositely arranged are formed in the circumferential direction of the plate body of the annular sealing cover plates, and a cooling fan is arranged at each sealing cover plate vent hole;
the side end face of the front end cover is uniformly provided with a plurality of front end cover vent holes along the circumferential direction, and the side end of the rear end cover is uniformly provided with a plurality of rear end cover vent holes along the circumferential direction;
the front end cover vent hole and the rear end cover vent hole respectively form a circulating heat radiation air path with the end plate vent hole, the magnetic yoke vent hole, the ventilation loop B, the ventilation loop A, the sealing cover vent hole and the heat radiation fan.
Preferably, the end face of the end ring is provided with an annular flange step, the front end cover is provided with a first flange spigot matched with the annular flange step, and the rear end cover is provided with a second flange spigot matched with the annular flange step.
Preferably, the upper end surface of each stator core segment is uniformly provided with a plurality of embedded grooves along the circumferential direction, when the plurality of stator core segments are arranged in an array mode to form a whole, the embedded grooves of the front and rear adjacent stator core segments can be overlapped in the circumferential direction, and the distance between the front and rear adjacent stator core segments can be fixed through interference fit of the core inserting strips and the embedded grooves, so that a ventilation loop A is formed.
Preferably, the two end plates are respectively and fixedly arranged at two ends of the magnetic yoke, the center of each end plate is provided with a first assembly hole, the cylinder body is fixedly arranged between the two end plates through the first assembly holes, and the inner cavity wall of the cylinder body is fixedly provided with a connecting flange.
Preferably, the magnetic yoke is located the both sides in every magnetic yoke ventilation hole and opens there is the fixed key assembly groove, and a plurality of fixed key passes through the bolt fastening and sets up in the fixed key assembly groove that corresponds with it, and the surface that the magnetic yoke is located every magnetic yoke ventilation hole department all is equipped with the magnetic pole array piece, and the both sides of every magnetic pole array piece are through realizing self installation location with fixed key interference fit.
Preferably, each magnetic pole module comprises a plurality of magnetic steels and a magnetic steel positioning block, wherein at least one magnetic steel assembly cavity for accommodating the magnetic steels is formed in the magnetic steel positioning block, a first laminating cambered surface matched with the outer contour of the magnetic yoke is arranged on the lower end face of the magnetic steel positioning block, and a second laminating cambered surface matched with the outer contour of the fixed key is respectively arranged at the left end and the right end of the magnetic steel positioning block.
Preferably, a ventilation slot plate is fixedly arranged between the front and rear adjacent magnetic pole modules, namely, a ventilation loop B is formed between the front and rear adjacent magnetic pole modules through the ventilation slot plate.
Preferably, an annular chamber is formed between the annular sealing cover plate and the outer contour of the stator core section, two groups of sealing cover plate vent holes which are oppositely arranged are formed in the circumferential direction of the plate body of the annular sealing cover plate, each cooling fan is communicated with the corresponding sealing cover plate vent hole through an annular air pipe, one end of the annular air pipe is communicated with the sealing cover plate vent hole, and the other end of the annular air pipe is provided with an air outlet.
Preferably, the section of each fixed key is in a wedge shape with a large upper part and a small lower part, a plurality of threaded holes are formed in the groove surface of each fixed key assembly groove from front to back of the magnetic yoke, and a plurality of assembly holes II matched with the threaded holes are formed in the key body of each fixed key.
Preferably, the end face of the front end cover is provided with a plurality of generator body assembly holes along the circumferential direction.
By means of the scheme, the invention has at least the following advantages:
compared with a rear end cover of a gear box with a traditional structure, the rear end cover has a certain thickness (an extension section is added), the rear end cover vent holes are added at the extension section along the circumferential direction, the front end cover also has the front end cover vent holes, and the front end cover and the rear end cover can be directly assembled with the generator body through a flange spigot structure, so that the engine base can directly form an annular cavity with the generator body, and cooling and heat dissipation can be performed through a cooling fan;
compared with the prior art, the technical scheme of the application cancels the traditional stator support structure, the annular cavity is realized only through the end ring, the annular sealing cover plate, the front end cover and the rear end cover, the blocking effect of the traditional stator support structure on the wind path is avoided, meanwhile, the total weight and the manufacturing cost of the generator can be reduced, the temperature rise distribution of the generator can be more uniform, four groups of cooling fans are uniformly arranged along the circumferential direction, as the number of the fans is increased, the cooling fans with smaller specifications can be selected, namely, the fans with the size of 2.5 kw can be replaced by the fans with the size of 4.2 kw, and the uniformity of the temperature rise of the motor in the circumferential direction can be effectively increased under the condition of little total cost increase.
Further, the rotor support of this application technical scheme comprises flange, barrel, end plate and yoke, compares in the structure of baffle + both sides pterygoid lamina + yoke among the prior art, and the pterygoid lamina changes into the end plate and has not only increased overall rigidity and improved the motor and load, can not produce unusual vortex in the motor simultaneously, and end plate and yoke self all open the ventilation hole, can cooperate with stator component and rotor component, realizes circulating heat dissipation wind path, can effectively increase the homogeneity of motor temperature rise at axial.
Furthermore, the technical scheme of the application has also cancelled the fixed key structure that the prior art magnetic pole module had and fixed magnetic pole module, when changing to through the fixed key of bolt fixed mounting, indirectly through the fixed key with the fixed setting of magnetic pole module at the surface of yoke, increase radial ventilation circuit simultaneously between the magnetic pole module, realized the cooling of rotor self, and the fixed key cross-section shape is whole wedge, its material is preferably non-magnetic material (such as austenitic stainless steel, aluminium, FRP etc.), can realize fine adjustment from top to bottom between fixed key and magnetic pole module and the yoke, and at motor during operation, the wedge fixed key can also be with the load along rotor circumferencial direction from the magnetic pole module for the rotor support through the fixed key assembly groove, the connecting bolt of wedge fixed key only bears axial force, compare prior art (the tangential load of magnetic pole module is finally through the frictional force transmission between magnetic pole module and rotor yoke installation face for the rotor support), the structural style of this application technical scheme bears more rationally. In addition, gaps among the magnetic pole modules in the prior art are filled by the wedge-shaped fixed keys, so that turbulence generated by the structure during motor operation is avoided.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate a certain embodiment of the present invention and therefore should not be considered as limiting the scope, and that other related drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a wind turbine generator system, wherein 41 is a drive train, 42 is a tower, 43 is a nacelle cover, and 44 is an impeller (45 hub, 46 blades);
FIG. 2 is a schematic diagram of a drive train, shown as a generator 47 and a gearbox 48;
FIG. 3 is a typical semi-direct drive unit direct-cooled generator, wherein 49 is a generator stator, 50 is a prior art radiator fan, 51 is a prior art rear end cap, and 52 is a generator stator end vent;
fig. 4 is a schematic diagram of a typical direct-cooled generator of a semi-direct-drive unit and an air cooling loop thereof, wherein 53 is a rear end cover of a gear box, 54 is a ventilation opening, 55 is a stator bracket, 56 is a stator core, 57 is a winding, and 58 is a rotor;
fig. 5 is a schematic diagram of a rotor structure of a typical direct-cooled generator of a semi-direct drive unit, in which 59 is a wing plate, 60 is a magnetic pole, 61 is a rotor bracket of the prior art, and 62 is a gap between the magnetic poles;
FIG. 6 is a schematic perspective view of a generator suitable for a wind power semi-direct drive unit;
FIG. 7 is a schematic diagram of another perspective view of a three-dimensional structure of a generator suitable for use in a wind semi-direct drive unit;
FIG. 8 is a schematic illustration of the structural relationship between the end ring, annular seal cover plate, seal cover plate vents and the rotor and stator components provided herein;
FIG. 9 is a schematic structural view of an end ring provided in the present application;
FIG. 10 is a schematic cross-sectional view of a generator suitable for use in a wind semi-direct drive unit;
FIG. 11 is a schematic view of the configuration of the annular chamber provided in the present application;
FIG. 12 is a schematic view of the structure of the ventilation circuit A of the present application;
fig. 13 is a schematic structural view of a stator core segment provided in the present application;
FIG. 14 is a schematic illustration of the structural relationship between a rotor support and a pole array block as provided herein;
FIG. 15 is a schematic view of the structural relationship between the attachment flange and the barrel provided in the present application;
fig. 16 is a schematic structural view of a yoke provided in the present application;
FIG. 17 is a schematic view of a magnetic steel positioning block of the present application;
fig. 18 is a schematic structural view of the ventilation circuit B provided in the present application.
In the figure: 1 frame, 2 rear end cover, 3 front end cover, 4 stator core segmentation, 5 tooth clamp plate, 6 iron core cartridge strip, 7 rotor support, 8 magnetic pole module, 9 flange, 10 barrel, 11 end plate, 12 yoke, 13 magnetic pole array piece, 14 end plate vent hole, 15 yoke vent hole, 16 end ring, 17 annular seal cover plate, 18 seal cover plate vent hole, 19 radiator fan, 20 front end cover vent hole, 21 rear end cover vent hole, 22 annular flange step, 23 flange spigot, 24 flange spigot two, 25 embedding groove, 26 assembly hole one, 27 fixed key assembly groove, 28 fixed key, 29 magnet steel, 30 magnet steel positioning block, 31 magnet steel assembly cavity, 32 laminating cambered surface one, 33 laminating cambered surface two, 34 ventilation slot plate, 35 annular cavity, 36 annular air pipe, 37 exhaust port, 38 screw hole, 39 assembly hole two, 40 generator body assembly hole.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Referring to fig. 6 to 18, a generator for a wind power semi-direct drive unit according to a preferred embodiment of the present invention includes a base 1 and a generator body, wherein the generator body is fixedly installed in an inner cavity of the base 1, the base 1 includes a front end cover 3 and a rear end cover 2 respectively disposed at two ends of the generator body, and the generator body includes a stator member around which a winding assembly is installed and a rotor member matched with a rotating shaft of the generator;
the generator body can be reliably installed and arranged through the machine base 1, and the normal operation of the generator body is ensured.
The stator component comprises a plurality of stator core sections 4, two tooth pressing plates 5 and a plurality of iron core inserting strips 6, wherein the plurality of stator core sections 4 are arranged in a front-to-back array and are fixed through the tooth pressing plates 5 and the iron core inserting strips 6, namely, the plurality of stator core sections 4, the tooth pressing plates 5 and the iron core inserting strips 6 form a whole, gaps are reserved between the front adjacent stator core sections 4 and the rear adjacent stator core sections 4, namely, a ventilation loop A is reserved between the front adjacent stator core sections 4 and the rear adjacent stator core sections, the two tooth pressing plates 5 are respectively attached to end faces of the stator core sections 4 at the front end and the rear end of the stator component, and the winding assembly is wound on the stator core sections 4;
the stator core sections 4 of a plurality of sets up side by side around the axial, and when realizing the fixed in position between a plurality of stator core sections 4 around through a plurality of iron core cartridge strip 6 tight fit along the circumferencial direction, can also constitute ventilation circuit A, and ventilation circuit A is the radial wind path at the circumferencial direction, can carry out cooling to stator component whole in the hoop.
The rotor component comprises a rotor support 7 and a plurality of magnetic pole modules 8, wherein the magnetic pole modules 8 are arranged in a front-back array manner to form a magnetic pole array block 13, a gap, namely a ventilation loop B, is formed between the two adjacent magnetic pole modules 8 in the front-back direction, the magnetic pole array block 13 is annularly arranged on the periphery of the rotor support 7 along the circumferential direction, the rotor support 7 is composed of a connecting flange 9, a cylinder body 10, an end plate 11 and a magnetic yoke 12, a plurality of end plate ventilation holes 14 are uniformly formed in the circumferential direction on the side end face of the plate body of the end plate 11, and a plurality of magnetic yoke ventilation holes 15 are uniformly formed in the circumferential direction on the end face of the magnetic yoke 12, which is matched with the magnetic pole modules 8 in an installation manner;
the ventilation loop B is a radial air path in the circumferential direction, so that the rotor component can be cooled down in the circumferential direction, further, the end plate ventilation hole 14, the magnetic yoke ventilation hole 15, the ventilation loop B and the ventilation loop A can form axial and circumferential air path communication, and finally, the rotor component and the stator component can be reliably cooled down, and meanwhile, the axial and circumferential temperature rise homogenization is realized, so that the integral reliable operation of the motor is further ensured.
The stator component further comprises two end rings 16, the machine base 1 further comprises annular sealing cover plates 17, the two end rings 16 are respectively arranged at tooth pressing plates 5 at the front end and the rear end of the generator body, the annular sealing cover plates 17 are arranged between the two end rings 16, the annular sealing cover plates 17 annularly wrap the generator body, the front end cover 3 and the rear end cover 2 are respectively fixedly arranged at the two ends of the generator body through the end rings 16 corresponding to the front end cover 3 and the rear end cover 2, at least one group of sealing cover plate vent holes 18 which are oppositely arranged are formed in the circumferential direction of the plate body of the annular sealing cover plates 17, and a cooling fan 19 is arranged at each sealing cover plate vent hole 18;
the two end rings 16 can realize reliable installation of the rear end cover 2 and the front end cover 3, the end rings 16 can be welded on the stator core section 4 together with the tooth pressing plates 5 to realize fixation, and the annular sealing cover 17 can realize annular cooling of the stator component and the rotor component through the sealing cover ventilation holes 18 and the cooling fans 19.
The side end face of the front end cover 3 is uniformly provided with a plurality of front end cover vent holes 20 along the circumferential direction, and the side end of the rear end cover 2 is uniformly provided with a plurality of rear end cover vent holes 21 along the circumferential direction;
the front cover vent hole 20 and the rear cover vent hole 21 respectively form a circulating heat radiation air path with the end plate vent hole 14, the magnet yoke vent hole 15, the vent circuit B, the vent circuit A, the sealing cover vent hole 18 and the heat radiation fan 19.
Preferably, the end face of the end ring 16 is provided with an annular flange step 22, the front end cover 3 is provided with a first flange spigot 23 matched with the annular flange step 22, and the rear end cover 2 is provided with a second flange spigot 24 matched with the annular flange step 22.
The structure can fundamentally solve the defects brought by the rotor support of the traditional structure, the flange structure ensures that the rear end cover 2 and the front end cover 3 are fixedly installed, and abnormal turbulence can not be generated in the motor.
Preferably, the upper end surface of each stator core segment 4 is uniformly provided with a plurality of embedded grooves 25 along the circumferential direction, when the plurality of stator core segments 4 are arranged in a front-back array to form a whole, the embedded grooves 25 of the two adjacent stator core segments 4 can be overlapped front and back in the circumferential direction, and the distance between the two adjacent stator core segments 4 can be fixed through the interference fit of the core inserting strip 6 and the embedded grooves 25, and a ventilation loop A is formed.
Preferably, the two end plates 11 are respectively and fixedly arranged at two ends of the magnetic yoke 12, the center of each end plate 11 is provided with a first assembly hole 26, the cylinder 10 is fixedly arranged between the two end plates 11 through the first assembly holes 26, and the inner cavity wall of the cylinder 10 is fixedly provided with the connecting flange 9.
Preferably, the two sides of the magnetic yoke 12, which are located at each magnetic yoke vent hole 15, are provided with fixed key assembly grooves 27, a plurality of fixed keys 28 are fixedly arranged in the corresponding fixed key assembly grooves 27 through bolts, the outer surface of the magnetic yoke 12, which is located at each magnetic yoke vent hole 15, is provided with magnetic pole array blocks 13, and the two sides of each magnetic pole array block 13 are in interference fit with the fixed keys 28 to realize self installation and positioning.
Preferably, each magnetic pole module 8 comprises a plurality of magnetic steels 29 and a magnetic steel positioning block 30, the magnetic steel positioning block 30 is provided with at least one magnetic steel assembly cavity 31 for accommodating the magnetic steels 29, the lower end face of the magnetic steel positioning block 30 is provided with a first lamination cambered surface 32 matched with the outer contour of the magnetic yoke 12, and the left end and the right end of the magnetic steel positioning block 30 are respectively provided with a second lamination cambered surface 33 matched with the outer contour of the fixed key 28.
Preferably, a ventilation slot plate 34 is fixedly arranged between the front and rear adjacent magnetic pole modules 8, namely, a ventilation loop B is formed between the front and rear adjacent magnetic pole modules 8 through the ventilation slot plate 34.
Preferably, an annular chamber 35 is formed between the annular sealing cover plate 17 and the outer contour of the stator core segment 4, two sets of sealing cover plate vent holes 18 which are oppositely arranged are formed in the plate body of the annular sealing cover plate 17 along the circumferential direction, each cooling fan 19 is communicated with the corresponding sealing cover plate vent hole 18 through an annular air pipe 36, one end of the annular air pipe 36 is communicated with the sealing cover plate vent hole 18, and the other end of the annular air pipe 36 is provided with an air outlet 37.
Preferably, the cross section of each fixed key 28 is in a wedge shape with a large upper part and a small lower part, the groove surface of the magnetic yoke 12 positioned in each fixed key assembly groove 27 is provided with a plurality of threaded holes 38 from front to back, and the key body of each fixed key 28 is provided with a plurality of assembly holes two 39 matched with the threaded holes 38.
Preferably, the end face of the front end cover 3 is provided with a plurality of generator body assembly holes 40 along the circumferential direction.
Through the integration that front end housing 3 can better realize generator and gear box, front end housing 3 can regard as "front end housing" of frame 1, can also regard as "rear end housing" of gear box simultaneously, through generator body mounting hole 40, can realize the direct attachment of frame 1 and gear box, avoid using the transition component, realized holistic high integration.
The working principle of the invention is as follows:
through the front end cover ventilation hole 20 that the front end cover 3 had and the rear end cover ventilation hole 21 that the rear end cover 2 had, can realize the intercommunication with rotor support 7, that is front end cover ventilation hole 20 and rear end cover ventilation hole 21 can be followed both ends and end plate ventilation hole 14 and yoke ventilation hole 15 intercommunication, and the top of yoke ventilation hole 15 is radial ventilation circuit B and radial ventilation circuit A promptly, can finally communicate with annular tuber pipe 36 through annular cavity 35, and circulation heat dissipation wind path has been realized in annular direction to whole motor from this.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and it should be noted that it is possible for those skilled in the art to make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (5)
1. The utility model provides a generator suitable for half direct-drive unit of wind-powered electricity generation, includes frame (1) and generator body, and the generator body is fixed to be installed in the inner chamber of frame (1), and frame (1) are including setting up front end housing (3) and rear end housing (2) at generator body both ends around respectively, and the generator body is including around installing the stator component of winding assembly and with generator shaft matched with rotor component, its characterized in that:
the stator component comprises a plurality of stator core segments (4), two tooth pressing plates (5) and a plurality of iron core inserting strips (6), wherein the stator core segments (4) are arranged in a front-to-back array and are fixed through the tooth pressing plates (5) and the iron core inserting strips (6), namely, the stator core segments (4) and the tooth pressing plates (5) and the iron core inserting strips (6) are integrated, gaps are reserved between the front adjacent stator core segments (4) and the rear adjacent stator core segments, namely, a ventilation loop A is arranged between the front stator core segments and the rear stator core segments, the two tooth pressing plates (5) are respectively attached to end faces of the stator core segments (4) arranged at the front end and the rear end of the stator component, and the winding assembly is wound on the stator core segments (4);
the rotor component comprises a rotor support (7) and a plurality of magnetic pole modules (8), wherein the front and rear arrays of the magnetic pole modules (8) form magnetic pole array blocks (13), gaps are reserved between the front and rear adjacent magnetic pole modules (8), namely a ventilation loop B, the magnetic pole array blocks (13) are annularly arranged on the periphery of the rotor support (7) along the circumferential direction, the rotor support (7) is composed of a connecting flange (9), a cylinder body (10), an end plate (11) and a magnetic yoke (12), a plurality of end plate ventilation holes (14) are uniformly formed in the end face of the end plate (11) on the side of the plate body along the circumferential direction, and a plurality of magnetic yoke ventilation holes (15) are uniformly formed in the end face of the magnetic yoke (12) which is matched with the magnetic pole modules (8) in the installation mode along the circumferential direction;
the stator component further comprises two end rings (16), the machine base (1) further comprises annular sealing cover plates (17), the two end rings (16) are respectively arranged at tooth pressing plates (5) at the front end and the rear end of the generator body, the annular sealing cover plates (17) are arranged between the two end rings (16), the annular sealing cover plates (17) wrap the generator body in an annular mode, the front end cover (3) and the rear end cover (2) are respectively fixedly arranged at the two ends of the generator body through the end rings (16) corresponding to the front end cover and the rear end cover, at least one group of sealing cover plate vent holes (18) which are oppositely arranged are formed in the circumferential direction of the plate body of the annular sealing cover plates (17), and a cooling fan (19) is arranged at each sealing cover plate vent hole (18);
the side end face of the front end cover (3) is uniformly provided with a plurality of front end cover vent holes (20) along the circumferential direction, and the side end of the rear end cover (2) is uniformly provided with a plurality of rear end cover vent holes (21) along the circumferential direction;
the front end cover vent hole (20) and the rear end cover vent hole (21) respectively form a circulating heat radiation air path with the end plate vent hole (14), the magnetic yoke vent hole (15), the vent loop B, the vent loop A, the sealing cover plate vent hole (18) and the heat radiation fan (19);
an annular flange step (22) is arranged on the end face of the end ring (16), the front end cover (3) is provided with a first flange spigot (23) matched with the annular flange step (22), and the rear end cover (2) is provided with a second flange spigot (24) matched with the annular flange step (22);
the upper end surface of each stator core segment (4) is uniformly provided with a plurality of embedded grooves (25) along the circumferential direction, when the plurality of stator core segments (4) are arranged in a front-back array to form a whole, the embedded grooves (25) of the two adjacent stator core segments (4) can be overlapped front and back in the circumferential direction, and the distance between the two adjacent stator core segments (4) can be fixed through the interference fit of the core inserting strip (6) and the embedded grooves (25), and a ventilation loop A is formed;
the magnetic yoke (12) is positioned at two sides of each magnetic yoke vent hole (15) and is provided with a fixed key assembly groove (27), a plurality of fixed keys (28) are fixedly arranged in the corresponding fixed key assembly grooves (27) through bolts, the outer surface of the magnetic yoke (12) positioned at each magnetic yoke vent hole (15) is provided with a magnetic pole array block (13), and two sides of each magnetic pole array block (13) are in interference fit with the fixed keys (28) to realize self installation and positioning;
each magnetic pole module (8) comprises a plurality of magnetic steels (29) and a magnetic steel positioning block (30), the magnetic steel positioning block (30) is provided with at least one magnetic steel assembly cavity (31) for accommodating the magnetic steels (29), the lower end face of the magnetic steel positioning block (30) is provided with a first lamination cambered surface (32) matched with the outer contour of the magnetic yoke (12), and the left end and the right end of the magnetic steel positioning block (30) are respectively provided with a second lamination cambered surface (33) matched with the outer contour of the fixed key (28);
an annular cavity (35) is formed between the annular sealing cover plate (17) and the outer outline of the stator core segment (4), two groups of sealing cover plate vent holes (18) which are arranged oppositely are formed in the circumferential direction of the plate body of the annular sealing cover plate (17), each cooling fan (19) is communicated with the corresponding sealing cover plate vent hole (18) through an annular air pipe (36), one end of the annular air pipe (36) is communicated with the sealing cover plate vent hole (18), and the other end of the annular air pipe is provided with an air outlet (37).
2. The generator suitable for a wind power semi-direct drive unit according to claim 1, wherein: the two end plates (11) are respectively and fixedly arranged at two ends of the magnetic yoke (12), an assembly hole I (26) is formed in the center of each end plate (11), the cylinder body (10) is fixedly arranged between the two end plates (11) through the assembly hole I (26), and a connecting flange (9) is fixedly arranged on the inner cavity wall of the cylinder body (10).
3. The generator suitable for a wind power semi-direct drive unit according to claim 1, wherein: a ventilation groove plate (34) is fixedly arranged between the front and rear adjacent magnetic pole modules (8), namely a ventilation loop B is formed between the front and rear adjacent magnetic pole modules (8) through the ventilation groove plate (34).
4. The generator suitable for a wind power semi-direct drive unit according to claim 1, wherein: the section of each fixed key (28) is wedge-shaped with big end down, the groove surface of each fixed key assembly groove (27) of the magnetic yoke (12) is provided with a plurality of threaded holes (38) from front to back, and the key body of each fixed key (28) is provided with a plurality of assembly holes II (39) matched with the threaded holes (38).
5. The generator suitable for a wind power semi-direct drive unit according to claim 1, wherein: the end face of the front end cover (3) is provided with a plurality of generator body assembly holes (40) along the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311804646.0A CN117477854B (en) | 2023-12-26 | 2023-12-26 | Generator suitable for wind power semi-direct drive unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311804646.0A CN117477854B (en) | 2023-12-26 | 2023-12-26 | Generator suitable for wind power semi-direct drive unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117477854A CN117477854A (en) | 2024-01-30 |
| CN117477854B true CN117477854B (en) | 2024-03-12 |
Family
ID=89633286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311804646.0A Active CN117477854B (en) | 2023-12-26 | 2023-12-26 | Generator suitable for wind power semi-direct drive unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117477854B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118074366B (en) * | 2024-04-18 | 2024-07-09 | 常州优谷新能源科技股份有限公司 | Horizontal generator for wind power generation and main shaft structure thereof |
| CN118100525B (en) * | 2024-04-28 | 2024-06-28 | 常州优谷新能源科技股份有限公司 | Wind power semi-direct-drive unit generator with cooling structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593780A (en) * | 2016-12-30 | 2017-04-26 | 山东中车风电有限公司 | Gear case and generator integrated design transmission structure |
| CN106992632A (en) * | 2017-06-06 | 2017-07-28 | 大连碧蓝节能环保科技有限公司 | Casing internal circulation air-cooled external rotor brushless DC motor |
| CN111365201A (en) * | 2020-04-27 | 2020-07-03 | 杭齿传动(安徽)有限公司 | Main shaft system of large wind generating set |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110556997A (en) * | 2019-09-20 | 2019-12-10 | 深圳市万至达电机制造有限公司 | Single-phase brushless high-speed motor |
-
2023
- 2023-12-26 CN CN202311804646.0A patent/CN117477854B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593780A (en) * | 2016-12-30 | 2017-04-26 | 山东中车风电有限公司 | Gear case and generator integrated design transmission structure |
| CN106992632A (en) * | 2017-06-06 | 2017-07-28 | 大连碧蓝节能环保科技有限公司 | Casing internal circulation air-cooled external rotor brushless DC motor |
| CN111365201A (en) * | 2020-04-27 | 2020-07-03 | 杭齿传动(安徽)有限公司 | Main shaft system of large wind generating set |
Non-Patent Citations (1)
| Title |
|---|
| 李松田.1.65MW半直驱永磁同步风力发电机研制.东方电机.(第05期),43-47. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117477854A (en) | 2024-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN117477854B (en) | Generator suitable for wind power semi-direct drive unit | |
| EP2182618B1 (en) | Arrangement for cooling of an electrical machine | |
| EP3819497B1 (en) | Generator and wind turbine | |
| CN102130540B (en) | Ventilating heat-radiation structure of direct-drive permanent-magnet wind-driven generator | |
| CN210927353U (en) | Low-vibration low-noise vertical motor | |
| CN212033942U (en) | Motor and wind generating set | |
| CN110535291A (en) | A kind of totally-enclosed machine with heat sinking function | |
| CN110768414A (en) | Cooling structure of permanent magnet motor | |
| CN207559785U (en) | A kind of motor of stator with ventilation slot mouth | |
| CN202183693U (en) | Double-fed wind driven generator | |
| WO2020220834A1 (en) | Cooling system, motor, and wind turbine generating set | |
| CN101267141A (en) | Vertical water wheel power generator no fan ventilation cooling device | |
| CN114498989B (en) | Wind driven generator with cooling function | |
| CN115912728A (en) | High-efficiency synchronous motor | |
| CN217159387U (en) | Cooling structure of wind driven generator | |
| CN212063670U (en) | Generator with fan | |
| CN112713716B (en) | Closed motor with internal and external cooling wind path and motor base | |
| CN107834774A (en) | A kind of motor of stator with ventilation slot mouth | |
| CN221633493U (en) | Be suitable for axial ventilation cooling's aerogenerator stator frame structure | |
| CN217720920U (en) | Double-wind-path straight-row wind driven generator convenient to maintain | |
| CN212463010U (en) | Marine four-pole medium-voltage synchronous generator adopting double-path ventilation cooling | |
| CN216774413U (en) | Light-weight self-cooling permanent magnet direct current brushless inner rotor motor for riding mower | |
| CN218449650U (en) | Ten-pole integral rotor punching sheet | |
| CN219999182U (en) | Outer rotor low-speed high-torque permanent magnet motor with water cooling device | |
| CN118100525B (en) | Wind power semi-direct-drive unit generator with cooling structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |