CN217427790U - Stator installation device and generator - Google Patents
Stator installation device and generator Download PDFInfo
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- CN217427790U CN217427790U CN202221368208.5U CN202221368208U CN217427790U CN 217427790 U CN217427790 U CN 217427790U CN 202221368208 U CN202221368208 U CN 202221368208U CN 217427790 U CN217427790 U CN 217427790U
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- stator
- dovetail
- pressing plate
- tooth
- frame
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- 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
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Abstract
The utility model discloses a stator installation device and generator, include: a stator frame; the first tooth pressing plate and the second tooth pressing plate; a plurality of stator cores installed between the first tooth pressure plate and the second tooth pressure plate; the dovetail ribs are inserted into the stator iron core along the axial direction of the stator; a pressing plate mounted on the stator frame; the first fixing structure is arranged on the dovetail ribs and provides radial pretightening force for the stator core through the dovetail ribs; and the second fixing structure penetrates through the stator frame and the pressing plate to be respectively installed at two ends of the dovetail rib, and provides axial pretightening force for the stator core through the stator frame and the pressing plate. The utility model discloses a second fixed knot constructs has banned the cross-core screw rod structure among the prior art, has structurally simplified for stator overall structure complexity reduces, and the corresponding well operation degree of difficulty in assembly process also reduces.
Description
Technical Field
The utility model relates to a aerogenerator technical field, in particular to stator installation device and generator.
Background
The stator core is an important component in the stator and is a main component of a magnetic circuit of the generator. It is composed of sector piece, ventilating slot piece, positioning rib, toothed press plate and tightening bolt. The stator core is formed by punching silicon steel sheets into fan-shaped sheets, stacking the fan-shaped sheets on the positioning ribs, and pressing the iron core into a whole by a tension bolt through a tooth pressing plate. The iron core is embedded with the winding, and when the generator runs, the iron core is subjected to the comprehensive action of mechanical force, thermal stress and electromagnetic force.
Referring to fig. 1, 2 and 3, a conventional stator core mounting structure includes a stator frame 110, a stator core 120, a first tooth pressing plate 130, a second tooth pressing plate 140, a pressing plate 150, a fixing structure and a tensioning structure, where the fixing structure includes a penetrating screw 161, a nut 162 and a gasket, where the penetrating screw 161 sequentially penetrates through the first tooth pressing plate 130, the stacked stator core 120, the second tooth pressing plate 140 and the pressing plate 150, so as to axially tension the stacked stator core 120; the tensioning structure comprises a dovetail rib 171, a sleeve 172, a spacer and a stud 173, wherein the radial tensioning structure and the axial fixing structure of the stacked stator core 120 are alternately arranged, i.e. the dovetail rib-related structure in the view of fig. 2 and the through-screw structure in the view of fig. 3 are alternately arranged.
In summary, the stator core mounting structure in the prior art is relatively complicated to assemble, and the penetrating screw rods 131 and the dovetail ribs 141 are alternately arranged, so that the number of parts of the prior art mounting device is relatively large, and the failure probability of the more parts in actual work is higher.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome stator mounting structure's among the prior art part relatively more, defect such as structure complicacy provides a stator core installation device and generator.
The utility model discloses an above-mentioned technical problem is solved through following technical scheme:
a stator mounting arrangement comprising: a stator frame; the first tooth pressing plate and the second tooth pressing plate; a plurality of stator cores installed between the first tooth pressure plate and the second tooth pressure plate; a dovetail bar inserted into the stator core; the pressure plate is arranged on the stator frame along the axial direction of the stator; the first fixing structure is arranged on the dovetail ribs and provides radial pretightening force for the stator core through the dovetail ribs; and the second fixing structure penetrates through the stator frame and the pressing plate to be respectively installed at two ends of the dovetail rib, and provides axial pretightening force for the stator core through the stator frame and the pressing plate.
Through above-mentioned technical scheme, adopt the second fixed knot to construct and has banned the through-the-core screw structure among the prior art, structurally simplified for stator overall structure complexity reduces, and the corresponding well operation degree of difficulty in the assembling process also reduces.
In an embodiment of the present invention, the second fixing structure is provided with two on each dovetail rib, and two the second fixing structure corresponds to the first tooth pressing plate and the second tooth pressing plate respectively.
Through above-mentioned technical scheme, all set up second fixed knot at the both ends of dovetail muscle and construct, produce the axial pretightning force between the both ends of accessible dovetail muscle and stator frame, the clamp plate, guarantee stator core's installation steadiness.
In an embodiment of the present invention, the second fixing structure includes: the stud is connected with the dovetail rib; the nut is connected to the stud and is tightly propped against the pressure plate or the stator frame; and the second gasket is coaxially arranged on the stud in a penetrating manner and is positioned between the nut and the pressure plate or between the nut and the stator frame.
Through the technical scheme, the stud in the second fixing structure is short in length and simple in structure compared with the penetrating screw, so that the overall cost of the stator is correspondingly reduced, and the economical efficiency is improved.
In an embodiment of the present invention, the mounting groove has all been seted up at the both ends of the dovetail rib, the mounting groove supplies the double-screw bolt inserts.
Through above-mentioned technical scheme, be convenient for the bolt in the second fixed knot structure insert to with dovetail muscle threaded connection.
In an embodiment of the present invention, two studs in the second fixing structure respectively pass through the stator frame, the first tooth pressing plate, the pressing plate, and the second tooth pressing plate, and are inserted into the mounting groove.
In an embodiment of the present invention, the first fixing structure is along the radial direction of the stator core and the dovetail bar is connected, and the second fixing structure is along the axial direction of the stator core and the dovetail bar is connected.
In an embodiment of the present invention, the first fixing structure is provided with a plurality of fixing structures at intervals along the length direction of the dovetail rib.
In an embodiment of the present invention, the first fixing structure includes: a threaded sleeve; the bolt is arranged on the screw sleeve in a penetrating mode, and the end portion of the bolt is connected with the dovetail rib; and the first gasket is coaxially arranged on the bolt in a penetrating way and is positioned between the bolt and the threaded sleeve.
In an embodiment of the present invention, the pressing plate is welded to the stator frame.
Through the technical scheme, the working torque on the stator core is jointly borne by the welding seam and the stud between the pressing plate and the stator frame, and the structure not only lightens the alternating load borne by the welding seam and the stud and improves the reliability of the whole structure; and moreover, the alternating load borne by the stud is reduced, and the stud is not easy to fatigue fracture and cause nut loosening. In addition, the load born by the welding seam is small, the welding amount can be relatively reduced, meanwhile, the welding deformation is reduced, and the integral size precision is easy to control.
The utility model also provides a generator has adopted as above stator installation device.
On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention. A stator mounting arrangement comprising: a stator frame; the first tooth pressing plate and the second tooth pressing plate; a plurality of stator cores installed between the first tooth pressure plate and the second tooth pressure plate; a dovetail bar inserted into the stator core; a pressure plate mounted on the stator frame; the first fixing structure is arranged on the dovetail ribs and provides radial pretightening force for the stator core through the dovetail ribs; and the second fixing structures are arranged at two ends of the dovetail ribs and provide axial pre-tightening force for the stator iron core through the stator frame and the pressing plate.
The utility model discloses an actively advance the effect and lie in:
through the second fixed knot structure has banned the cross-core screw rod structure among the prior art, has structurally simplified for stator overall structure complexity reduces, and the corresponding well operation degree of difficulty in the assembling process also reduces, and in addition, its length in cross-core screw rod is compared to the double-screw bolt among the second fixed knot structure short, simple structure, so make the holistic cost of stator also corresponding reduction, improve economic nature.
Drawings
FIG. 1 is a schematic view of a stator mounting apparatus of the prior art;
FIG. 2 is a cross-sectional view of the stator mounting assembly A-A of FIG. 1;
FIG. 3 is a cross-sectional view of the stator mounting assembly B-B of FIG. 1;
fig. 4 is an isometric view of a stator mounting assembly of the present invention in one embodiment;
fig. 5 is a plan view of an embodiment of a stator mounting apparatus according to the present invention;
FIG. 6 is a cross-sectional view of the stator mounting assembly A-A of FIG. 5;
fig. 7 is an enlarged view of a portion a of fig. 6, mainly showing a second fixing structure.
Description of the reference numerals:
a stator frame 210;
a first toothed press plate 220;
a second toothed pressure plate 230;
a stator core 240;
a mounting groove 251;
a platen 260;
a first securing structure 270;
a threaded sleeve 271;
a bolt 272;
a first washer 273;
a second securing structure 280;
a stud 281;
a nut 282;
and a second pad 283.
Detailed Description
The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the present invention is not limited thereto.
Please refer to fig. 4 to 7. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope covered by the technical content disclosed in the present invention without affecting the function and the achievable purpose of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
Referring to fig. 4, 5 and 6, the present invention provides a stator mounting device, which can be applied to various wind power generators, such as asynchronous generator, synchronous generator, horizontal axis generator or vertical axis generator. Specifically, the stator mounting device includes a stator frame 210, a first tooth pressing plate 220, a second tooth pressing plate 230, a plurality of stator cores 240, a dovetail bar 250, a pressing plate 260, a first fixing structure 270, and a second fixing structure 280; wherein the stator core 240 is mounted on the stator frame 210, and the plurality of stator cores 240 are fastened by the first and second fixing structures 270 and 280 on the dovetail bar 250.
Referring to fig. 6, in the present embodiment, the first tooth pressing plate 220 and the second tooth pressing plate 230 are respectively installed at two axial sides of the stator frame 210, and the plurality of stator cores 240 are installed between the first tooth pressing plate 220 and the second tooth pressing plate 230 in a stacked manner. Specifically, in the actual installation process, the first tooth pressure plate 220 is first installed on the stator frame 210; subsequently, the plurality of stator cores 240 are stacked on the stator frame 210, and the plurality of stator cores 240 are pressed by a press, wherein the press is preferably an oil press in this embodiment; at the back, the second tooth pressure plate 230 is installed at one side of the stator frame 210 symmetrical to the first tooth pressure plate 220, and the stator core 240 and the second tooth pressure plate 230 are pressed and maintained by the press machine, thereby facilitating the subsequent installation work.
Referring to fig. 6, in the present embodiment, the pressing plate 260 presses the second tooth pressing plate 230, the plurality of stator cores 240, and the first tooth pressing plate 220 onto the stator frame 210 to fix the stator cores 240; in addition, dovetail 250 inserts in stator core 240 along the stator axial, and first fixed knot structure 270 on dovetail 250 can provide radial pretightning force to stator core 240, and second fixed knot structure 280 on dovetail 250 can provide axial pretightning force to stator core 240, and it needs to explain that, in actual assembly process, in order to satisfy the holistic intensity demand of stator, can select the quantity and the mounted position of dovetail 250 according to actual conditions, the utility model discloses in do not do too much restriction; it should be noted that, in the present embodiment, in order to satisfy the connection strength and the stability, the pressing plate 260 and the stator frame 210 are fixed by welding.
Referring to fig. 6 and 7, in the present embodiment, the first fixing structures 270 are installed on the dovetail bar 250, and a plurality of the first fixing structures are arranged at intervals along the length direction of the dovetail bar 250. Further, the first fixing structure 270 includes a threaded sleeve 271, a bolt 272, and a first washer 273; the bolt 272 is connected to the dovetail bar 250 along the axial direction of the stator, specifically, the bolt 272 is inserted into the thread sleeve 271, a threaded hole is formed in the dovetail bar 250 at a position corresponding to the bolt 272, and the end of the bolt 272 is in threaded connection with the threaded hole in the dovetail bar 250; a first washer 273 is coaxially disposed through the bolt 272 between the end of the bolt 272 and the threaded sleeve 271. In the actual assembling process, the dovetail rib 250 provides radial pretightening force to the stator core 240 by rotating the bolt 272, so that the stator core 240 is preliminarily fastened.
Referring to fig. 6 and 7, in the present embodiment, two second fixing structures 280 are disposed on each dovetail bar 250 and respectively penetrate through the stator frame 210 and the pressing plate 260 to be located at two ends of the dovetail bar 250, and the two second fixing structures 280 respectively correspond to the first tooth pressing plate 220 and the second tooth pressing plate 230. Specifically, the second fixing structure 280 includes a stud 281, a nut 282, and a second washer 283; mounting grooves 251 are formed at two ends of the dovetail bar 250, wherein one ends of two studs 281 respectively penetrate through the stator frame 210, the first tooth pressing plate 220 and the pressing plate 260, and the second tooth pressing plate 230 and are inserted into the mounting grooves 251, and internal threads are arranged in the mounting grooves 251, so that the studs 281 and the dovetail bar 250 are in threaded connection; the nut 282 is screwed on the screw bolt 281 and tightly abuts against the pressure plate 260 or the stator frame 210; the second washer 283 is coaxially disposed on the stud 281, and the two second washers 283 are respectively disposed between the nut 282 and the pressing plate 260 and between the nut 282 and the stator frame 210.
Referring to fig. 4 and 6, in an actual assembly process, a through hole for the stud 281 to pass through is formed in one side of the first tooth pressing plate 220 of the stator frame 210, the stud 281 at one end of the dovetail bar 250 passes through the stator frame 210 and the first tooth pressing plate 220 and is in threaded connection with the dovetail bar 250, and the stud 281 at the other end of the dovetail bar 250 passes through the pressing plate 260 and the second tooth pressing plate 230 and is in threaded connection with the dovetail bar 250; subsequently, the stator core 240 is further fastened by tightening the nut 282 such that the stator frame 210 and the pressure plate 260 provide an axial preload force to the stator core 240.
The utility model discloses a second fixed knot constructs 280 has banned the cross-core screw rod structure among the prior art, has structurally simplified for stator overall structure complexity reduces, and the corresponding well operation degree of difficulty in assembly process also reduces, and in addition, double-screw bolt 281 among the second fixed knot constructs 280 compares in its length of cross-core screw rod short, simple structure, so makes the holistic cost of stator also corresponding reduction, improves the economic nature.
In addition, in actual operation, the working surface pressure on the stator core 240 is borne by the welding seam between the pressure plate 260 and the stator frame 210 and the studs 281 together, and the structure not only lightens the alternating load borne by the welding seam and the studs 281, but also improves the reliability of the whole structure; and the alternating load borne by the studs 281 is reduced, and the nuts 282 are not easy to fatigue fracture and loosen. In addition, the load born by the welding seam is small, the welding amount can be relatively reduced, meanwhile, the welding deformation is reduced, and the integral size precision is easy to control.
The utility model discloses in, above-mentioned stator installation device need follow following in proper order in actual assembly, specifically as follows: first, the first tooth holder 220 is mounted on one axial end of the stator frame 210; then, the plurality of stator cores 240 are mounted on the stator frame 210 in a stacked manner, and the plurality of stator cores 240 are compressed by a press; subsequently, the second presser tooth 230 is mounted at the other axial end of the stator frame 210, and the second presser tooth 230 and the stator core 240 are pressed and held by a press; thereafter, the dovetail bar 250 is inserted into the stator core 240, the bolt 272, the boss 271 and the first washer 273 in the first fixing structure 270 are mounted on the dovetail bar 250, and the bolt 272 is rotated, even if the stator core 240 and the stator frame 210 are fixedly restrained in the radial direction by the dovetail bar 250; then, the nut 282, the stud 281 and the second washer 283 in the second fixing structure 280 are installed on the dovetail bar 250, and the nut 282 is screwed, so that an axial pretightening force is generated between the dovetail bar 250 and the stator frame 210 and the pressure plate 260, and the stator core 240 is further compressed; finally, the pressing plate 260 and the stator frame 210 are welded and fixed, and after the welding is cooled to room temperature, the press on the second pressing plate 230 is removed, and the lamination operation of the stator core 240 is completed. After the stator core 240 is stacked, the pretightening force of the nut 282 and the bolt 272 needs to be verified to ensure the installation stability of the stator core 240.
The utility model also provides a generator, include as above stator installation device.
To sum up, the utility model discloses a second fixed knot constructs 280 has banned the cross-core screw rod structure among the prior art, has structurally simplified for stator overall structure complexity reduces, and the corresponding well operation degree of difficulty in assembly process also reduces, and in addition, double-screw bolt 281 among the second fixed knot constructs 280 compares in its length weak point of cross-core screw rod, simple structure, so makes the holistic cost of stator also corresponding reduction, improves the economic nature. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments can be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (10)
1. A stator mounting arrangement comprising:
a stator frame;
the first tooth pressing plate and the second tooth pressing plate;
a plurality of stator cores installed between the first tooth pressure plate and the second tooth pressure plate;
the dovetail ribs are inserted into the stator iron core along the axial direction of the stator;
a pressing plate mounted on the stator frame; it is characterized in that the preparation method is characterized in that,
the first fixing structure is arranged on the dovetail ribs and provides radial pretightening force for the stator core through the dovetail ribs;
and the second fixing structure penetrates through the stator frame and the pressing plate to be respectively installed at two ends of the dovetail rib, and provides axial pretightening force for the stator core through the stator frame and the pressing plate.
2. The stator mounting apparatus of claim 1 wherein two of said second fixing structures are provided on each of said dovetail bars, and two of said second fixing structures correspond to said first and second tooth holders, respectively.
3. The stator mounting apparatus of claim 2, wherein the second securing structure comprises:
the stud is connected with the dovetail rib;
the nut is connected to the stud and tightly propped against the pressing plate or the stator frame;
and the second gasket is coaxially arranged on the stud in a penetrating manner and is positioned between the nut and the pressure plate or between the nut and the stator frame.
4. The stator mounting device according to claim 3, wherein mounting grooves are formed at both ends of the dovetail bar, and the mounting grooves are used for the stud to be inserted.
5. The stator mounting assembly of claim 4 wherein said studs of both of said second fastening structures are inserted through said stator frame, said first tooth pressure plate and said pressure plate, and said second tooth pressure plate, respectively, and into said mounting slots.
6. The stator mounting assembly of claim 1 wherein the first securing structure is coupled to the dovetail along a radial direction of the stator core and the second securing structure is coupled to the dovetail along an axial direction of the stator core.
7. A stator mounting arrangement according to claim 6, wherein the first fixing formation is provided in plurality at intervals along the length of the dovetail bar.
8. The stator mounting apparatus of claim 6, wherein the first securing structure comprises:
a threaded sleeve;
the bolt is arranged on the screw sleeve in a penetrating mode, and the end portion of the bolt is connected with the dovetail rib;
and the first gasket is coaxially arranged on the bolt in a penetrating way and is positioned between the bolt and the threaded sleeve.
9. The stator mounting assembly of claim 1 wherein said clamp plate and said stator frame are welded together.
10. A generator, characterised in that a stator mounting arrangement according to any one of claims 1 to 9 is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221368208.5U CN217427790U (en) | 2022-06-01 | 2022-06-01 | Stator installation device and generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221368208.5U CN217427790U (en) | 2022-06-01 | 2022-06-01 | Stator installation device and generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217427790U true CN217427790U (en) | 2022-09-13 |
Family
ID=83170921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221368208.5U Active CN217427790U (en) | 2022-06-01 | 2022-06-01 | Stator installation device and generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217427790U (en) |
-
2022
- 2022-06-01 CN CN202221368208.5U patent/CN217427790U/en active Active
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