CN219298260U - Stator foundation plate of hydraulic generator - Google Patents
Stator foundation plate of hydraulic generator Download PDFInfo
- Publication number
- CN219298260U CN219298260U CN202223384708.0U CN202223384708U CN219298260U CN 219298260 U CN219298260 U CN 219298260U CN 202223384708 U CN202223384708 U CN 202223384708U CN 219298260 U CN219298260 U CN 219298260U
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- China
- Prior art keywords
- stator
- base plate
- support legs
- hydro
- radial
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- 239000000314 lubricant Substances 0.000 claims description 3
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- Y02E10/20—Hydro energy
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- Motor Or Generator Frames (AREA)
Abstract
The utility model relates to a stator foundation plate of a hydraulic generator, which belongs to the technical field of vertical hydraulic generators and comprises a concrete base, wherein stator support legs are arranged at the upper end of the concrete base, a stator foundation plate which is integrally cast with the concrete base is arranged between the stator support legs and the concrete base, and radial keys which are respectively inserted and sleeved with the stator support legs in a clamping groove type are arranged between the stator foundation plate and the stator support legs. Has the characteristics of simple structure, good effect and long service life. The acting force on the stator base, the connecting bolts and the foundation concrete caused by the thermal expansion of the stator is reduced, and the corresponding harmful deformation is eliminated.
Description
Technical Field
The utility model relates to the technical field of vertical hydraulic generators, in particular to a hydraulic generator stator foundation plate.
Background
In the design of the medium-large capacity vertical hydraulic generator, the outer diameter of the generator set is usually larger, the ambient temperature of a stator before the generator is started is usually 25 ℃, the working ambient temperature of the stator after the generator is started is usually 65-85 ℃, the temperature difference of about 40-60K exists, the radial thermal expansion amount of the base is 0.44-0.66 and mm, for the medium-large capacity vertical generator set, the outer diameter of the stator is usually more than 6m, the thermal expansion amount is more than the actual absolute thermal expansion amount of the connecting bolt and is more than 2.6-2.6 mm.9 mm, the larger the outer diameter of the base is, the larger the thermal expansion amount is, the connecting bolt of the stator foundation plate with a conventional structure is subjected to larger shearing force, and meanwhile, the stator foundation concrete is subjected to larger radial force and has harmful damage to the stator, the connecting bolt and the foundation concrete.
The stator foundation plate structure conventionally used at present is in direct connection type, the stator support legs are in complete contact with the foundation plate, and the stator support legs are connected through bolts. The method has the advantages that complete constraint is formed on the stator, thermal stress caused by thermal expansion of the stator is completely transferred to stator foundation concrete, and potential risks of application of the stator foundation plate on the medium-large-capacity hydroelectric generating set are reduced.
Disclosure of Invention
The utility model mainly solves the defects existing in the prior art, and provides a stator foundation plate of a hydraulic generator, which has the characteristics of simple structure, good effect and long service life. The acting force on the stator base, the connecting bolts and the foundation concrete caused by the thermal expansion of the stator is reduced, and the corresponding harmful deformation is eliminated.
The technical problems of the utility model are mainly solved by the following technical proposal:
the stator foundation plate of the hydraulic generator comprises a concrete base, wherein stator support legs are arranged at the upper end of the concrete base, a stator foundation plate which is integrally cast and formed with the concrete base is arranged between the stator support legs and the concrete base, and radial keys which are respectively inserted and sleeved with the stator support legs in a clamping groove type are arranged between the stator foundation plate and the stator support legs.
Preferably, a pair of bolts positioned at two sides of the radial key are arranged at the left side and the right side of the stator support leg.
Preferably, the stator support legs are provided with large gaskets which are sleeved and connected with bolts in a pressing mode.
Preferably, the cross section of the radial key is rectangular.
Preferably, the radial key surface is coated with a molybdenum disulfide lubricant. Reducing the radial friction at the contact surface by about 80%.
Preferably, the radial key is fixed with the stator base plate by slot type inserting welding.
Preferably, the depth of the groove clamped between the stator support leg and the radial key is smaller than the height dimension of the 1/2 radial key, so that the stator support leg is not in direct contact with the stator base plate, and the stator can slide along the radial direction in a thermal expansion state.
Preferably, the radial key length is less than the width dimension of the stator leg, stator base plate.
The utility model can achieve the following effects:
compared with the prior art, the stator base plate of the hydro-generator has the characteristics of simple structure, good effect and long service life. The acting force on the stator base, the connecting bolts and the foundation concrete caused by the thermal expansion of the stator is reduced, and the corresponding harmful deformation is eliminated.
Drawings
Fig. 1 is a schematic elevational view of the present utility model.
Fig. 2 is a sectional view of the structure of the present utility model at this time.
In the figure: stator landing leg 1, radial key 2, stator foundation plate 3, concrete base 4, big packing ring 5, bolt 6.
Detailed Description
The technical scheme of the utility model is further specifically described below through examples and with reference to the accompanying drawings.
Examples: as shown in fig. 1 and 2, a stator foundation plate of a hydraulic generator comprises a concrete base 4, wherein a stator supporting leg 1 is arranged at the upper end of the concrete base 4, a stator foundation plate 3 integrally cast with the concrete base 4 is arranged between the stator supporting leg 1 and the concrete base 4, radial keys 2 which are respectively inserted and sleeved with the stator supporting leg 1 in a slot manner are arranged between the stator foundation plate 3 and the stator supporting leg 1, the length of each radial key 2 is smaller than the width dimension of the stator supporting leg 1 and the stator foundation plate 3, the slot depth of the stator supporting leg 1 and the radial keys 2 in a clamping manner is smaller than the height dimension of the radial keys 2 1/2, so that the stator supporting leg 1 and the stator foundation plate 3 are in non-direct contact, and the stator can slide along the radial direction in a thermal expansion state. The radial key 2 and the stator base plate 3 are clamped in a groove type inserted and welded and fixed, and the cross section of the radial key 2 is of a rectangular structure. And coating molybdenum disulfide lubricant on the surface of the radial key 2. The left side and the right side of the stator supporting leg 1 are respectively provided with a pair of bolts 6 positioned at the two sides of the radial key 2. The stator support legs 1 are respectively provided with a large gasket 5 which is sleeved and connected with the bolts 6.
The stator base plate 3 is connected with the stator support legs 1 through radial keys 2, so that the stator can slide effectively in the radial direction. When the hydraulic generator works, the ambient temperature of the stator before the generator starts is usually 25 ℃, the working ambient temperature of the stator after the generator starts is usually 65-85 ℃, the outer diameter of the stator base is 8m, the thermal expansion of the stator is about 3.5-mm-8.3-mm, the diameter of a connecting bolt through hole on a stator support leg is designed to be 16mm larger than that of the connecting bolt, and a large washer is correspondingly designed, so that on the premise of ensuring the axial connection safety, enough radial space is reserved between the stator support leg and the connecting bolt, and the stator base is free from interference during radial sliding. The radial key width dimension may be generally designed to be 1/10 of the base plate width. The radial load between the stator foundation plate 3 and the concrete base 4 is reduced, the radial stress state between the stator legs and the foundation plate is improved, and the harmful deformation of the stator base caused by thermal expansion is eliminated.
In conclusion, the stator foundation plate of the hydraulic generator has the characteristics of simple structure, good effect and long service life. The acting force on the stator base, the connecting bolts and the foundation concrete caused by the thermal expansion of the stator is reduced, and the corresponding harmful deformation is eliminated.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
In summary, the foregoing description is only one embodiment of the present utility model, but the present utility model is not limited to the above embodiments, and any changes or modifications within the scope of the present utility model are intended to be included in the scope of the present utility model.
Claims (8)
1. A hydro-generator stator foundation plate, characterized in that: the novel stator foundation slab comprises a concrete base (4), wherein stator support legs (1) are arranged at the upper ends of the concrete base (4), stator foundation slabs (3) which are integrally cast and formed with the concrete base (4) are arranged between the stator support legs (1) and the concrete base (4), and radial keys (2) which are respectively inserted and sleeved with the stator support legs (1) in a clamping groove mode are arranged between the stator foundation slabs (3) and the stator support legs (1).
2. A hydro-generator stator base plate as defined in claim 1 wherein: the left side and the right side of the stator supporting leg (1) are respectively provided with a pair of bolts (6) positioned at the two sides of the radial key (2).
3. A hydro-generator stator base plate as defined in claim 2 wherein: the stator support legs (1) are respectively provided with a large gasket (5) which is sleeved and connected with the bolts (6) in a pressing way.
4. A hydro-generator stator base plate as defined in claim 1 wherein: the cross section of the radial key (2) is in a rectangular structure.
5. A hydro-generator stator base plate as defined in claim 1 wherein: and a molybdenum disulfide lubricant is coated on the surface of the radial key (2).
6. A hydro-generator stator base plate as defined in claim 1 wherein: the radial key (2) and the stator base plate (3) are clamped in a groove type, inserted and welded and fixed.
7. A hydro-generator stator base plate as defined in claim 1 wherein: the groove depth of the stator support leg (1) clamped with the radial key (2) is smaller than the height dimension of the 1/2 radial key (2), so that the stator support leg (1) is not in direct contact with the stator base plate (3), and the stator can slide along the radial direction in a thermal expansion state.
8. A hydro-generator stator base plate as defined in claim 1 wherein: the length of the radial key (2) is smaller than the width dimensions of the stator support leg (1) and the stator foundation plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223384708.0U CN219298260U (en) | 2022-12-16 | 2022-12-16 | Stator foundation plate of hydraulic generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223384708.0U CN219298260U (en) | 2022-12-16 | 2022-12-16 | Stator foundation plate of hydraulic generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219298260U true CN219298260U (en) | 2023-07-04 |
Family
ID=86955984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223384708.0U Active CN219298260U (en) | 2022-12-16 | 2022-12-16 | Stator foundation plate of hydraulic generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219298260U (en) |
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2022
- 2022-12-16 CN CN202223384708.0U patent/CN219298260U/en active Active
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