CN113803202B - Water leakage collecting device for guide vane shaft head of hydroelectric generating set - Google Patents
Water leakage collecting device for guide vane shaft head of hydroelectric generating set Download PDFInfo
- Publication number
- CN113803202B CN113803202B CN202110907516.4A CN202110907516A CN113803202B CN 113803202 B CN113803202 B CN 113803202B CN 202110907516 A CN202110907516 A CN 202110907516A CN 113803202 B CN113803202 B CN 113803202B
- Authority
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- China
- Prior art keywords
- guide vane
- sleeve
- water
- pivot
- annular groove
- 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.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 238000007789 sealing Methods 0.000 claims abstract description 80
- 238000011010 flushing procedure Methods 0.000 claims description 11
- 239000000428 dust Substances 0.000 claims description 6
- 230000002708 enhancing effect Effects 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 10
- 230000005484 gravity Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/006—Sealing arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/16—Stators
- F03B3/18—Stator blades; Guide conduits or vanes, e.g. adjustable
- F03B3/183—Adjustable vanes, e.g. wicket gates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/10—Stators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/24—Rotors for turbines
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention relates to a water leakage collecting device of a guide vane shaft head of a hydroelectric generating set, which comprises a guide vane pivot, wherein a guide vane arm is arranged outside the guide vane pivot and close to the end part of the guide vane pivot, the guide vane pivot is provided with a boss, a joint bearing is arranged between the guide vane arm and the boss in a clamping way, a guide vane sleeve is arranged outside the joint bearing, a water drainage groove is formed in a concave part in the middle of an outer ring of the joint bearing, the water drainage groove is used for collecting water leakage at the guide vane pivot, and a water collecting cover is arranged outside the guide vane sleeve; the lowest part of the guide vane sleeve is provided with a drain hole, and the drain hole is communicated with the drain groove. According to the invention, the water leakage generated by the sealing damage of the shaft sleeve is collected and post-treated in time, so that the further damage of the guide vane shaft sleeve caused by the water leakage is reduced, and the pollution to the external environment is reduced.
Description
Technical Field
The invention relates to a guide vane shaft head water leakage collecting device, in particular to a guide vane shaft head water leakage collecting device of a hydroelectric generating set.
Background
A hydro-generator set is a device that connects a water turbine and a generator together, converts water flow energy into rotational mechanical energy, and converts the rotational mechanical energy into electrical energy.
The bulb tubular hydroelectric generating set is of a horizontal structure, and guide vanes of the water turbine are distributed on the vertical surface. The guide vane is connected with the control ring through the crank arm, and the control ring is controlled by the guide vane servomotor so as to adjust the opening of the guide vane. The sealing of the guide vane shaft sleeve and the water guide mechanism is mainly of a YX sealing structure, the sealing is positioned at the inner side of the sealing sleeve, the outer side of the sealing sleeve is close to an O-shaped rubber sealing ring, and the whole sealing sleeve is fixed on the water guide mechanism through a limiting pin. In the rotating process of the guide vane, the water pressure in the flow channel acts on the YX sealing surface, and the lip edge of the YX sealing surface is sealed with the rotating guide vane pivot. During the starting-up, stopping-down and normal operation of the machine set, the guide vanes rotate all the time, and after the YX seal and the guide vane pivot rub each other for a period of time, the sealing lip damages the water pressure in the failure flow channel to leak outwards. Meanwhile, because the sealing structure is simple, the guide vanes are distributed on the vertical surfaces of the guide vanes and are stressed differently, and particularly in the horizontal direction, the shaft sleeve is easy to be eccentrically worn when being sealed under the action of the gravity of the guide vanes, and the damage of the seal is accelerated.
Disclosure of Invention
The invention aims to solve the technical problem of providing the water leakage collecting device for the guide vane shaft head of the hydroelectric generating set, which is used for timely collecting and post-treating water leakage generated by sealing damage of the shaft sleeve, reducing further damage of the guide vane shaft sleeve caused by water leakage and reducing pollution to the external environment.
The technical scheme for solving the technical problems is as follows: the utility model provides a hydroelectric set stator spindle nose collection device that leaks, includes the stator pivot, the stator pivot is outer and be close to stator pivot end installs the stator arm, the stator pivot has the boss, the stator arm with block between the boss installs the joint bearing, install the stator sleeve outward the joint bearing, the water drainage tank has been seted up to joint bearing outer lane middle part concave part, the water drainage tank is used for collecting the water leakage of stator pivot department, the stator sleeve outside is equipped with the water catch bowl;
the lowest part of the guide vane sleeve is provided with a drain hole, and the drain hole is communicated with the drain groove.
The beneficial effects of the invention are as follows: the guide vane pivot can generate eccentric wear on the sealing sleeve to cause water seepage in the long-time rotation process of the guide vane pivot due to self gravity.
On the basis of the technical scheme, the invention can be improved as follows.
Further, a flushing hole is formed in the water collecting cover and communicated with a gap between the water collecting cover and the guide vane sleeve.
The water collecting cover has the beneficial effects that after the drain hole on the guide vane sleeve is blocked, the drain hole is flushed and dredged through the flushing hole, and the flushing hole is also used for testing whether the sealing between the water collecting cover and the guide vane sleeve meets the requirements.
Furthermore, an outer water distribution ring is arranged outside the guide vane pivot, and a sealing sleeve is arranged between the outer water distribution ring and the boss.
The sealing sleeve has the beneficial effect that the sealing sleeve is used for reducing water seepage between the outer water distribution ring and the boss.
Further, a YX-type sealing ring for the shaft is arranged between the sealing sleeve and the guide vane pivot.
The YX sealing ring for the shaft has the beneficial effect that water seepage between the outer water distribution ring and the boss is further reduced.
Further, a V-shaped sealing ring is arranged between the outer ring of the knuckle bearing and the guide vane arm.
The adoption of the further scheme has the beneficial effects that the sealing between the joint bearing and the guide vane arm is enhanced, and the water seepage is reduced.
Further, a first annular groove is formed in one side, close to the joint bearing, of the guide vane sleeve, and a first sealing ring is installed in the first annular groove.
The beneficial effect of adopting above-mentioned further scheme is that first sealing washer reduces the infiltration between joint bearing and the stator sleeve, strengthens sealedly.
Further, a second annular groove and a third annular groove are formed in the water collecting cover, and a second sealing ring and a dust-proof ring are respectively arranged in the second annular groove and the third annular groove.
The beneficial effect of adopting the further proposal is that the second sealing ring is used for strengthening the sealing between the guide vane sleeve and the water collecting cover; the dust ring is used to prevent dust or foreign materials from entering the rotating member.
Further, a fourth annular groove is formed in the water collecting cover and located between the second annular groove and the third annular groove, and a rotary sealing ring for a shaft is installed in the fourth annular groove. The rotary sealing ring for the shaft has the beneficial effect that the sealing between the water collecting cover and the guide vane sleeve is further enhanced by the rotary sealing ring for the shaft.
Further, an end cover is mounted on the end portion of the guide vane pivot through a bolt, and a combined sealing gasket is arranged between the bolt and the end cover.
The beneficial effect of adopting above-mentioned further scheme is that the end cover prevents that infiltration from leaking outward in bolt department.
Further, a third sealing ring is arranged between the guide vane sleeve and the outer water distribution ring.
The beneficial effect of adopting above-mentioned further scheme is that the third sealing washer is used for strengthening the sealing between stator sleeve and the outer water distribution ring.
Drawings
FIG. 1 is a schematic cross-sectional view of an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of the structure of FIG. 1A according to the present invention;
Fig. 3 is a schematic structural diagram of an embodiment of the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. A guide vane pivot; 2. a guide vane arm; 3. a boss; 4. a knuckle bearing; 5. a guide vane sleeve; 6. a drainage channel; 7. a drain hole; 8. a water collecting cover; 9. flushing the hole; 10. an outer water distribution ring; 11. sealing sleeve; 12. a guide vane arm; 13. a V-shaped sealing ring; 14. a first seal ring; 15. a second seal ring; 16. a dust ring; 17. a rotary seal ring for a shaft; 18. an end cap; 19. a bolt; 20. and a third sealing ring.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the system or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1,2 and 3, the water leakage collecting device for the guide vane shaft head of the hydroelectric generating set comprises a guide vane pivot 1, wherein an end cover 18 is mounted at the end part of the guide vane pivot 1 through a bolt 19, and the end cover 18 can effectively prevent the guide vane arm 2 from being removed along the axial direction of the guide vane pivot 1. A combined sealing gasket is arranged between the bolt 19 and the end cover 18, and is mainly used for strengthening sealing and preventing water seepage from leaking outside at the bolt 19. The guide vane arm 2 is arranged outside the guide vane pivot 1 and near the end part of the guide vane pivot 1, one end of the guide vane arm 2 is sleeved outside the guide vane pivot 1, and the other end extends outwards.
The guide vane pivot 1 is provided with a boss 3, a joint bearing 4 is mounted between the guide vane arm 2 and the boss 3 in a clamping manner, the joint bearing 4 comprises a joint bearing inner ring and a joint bearing outer ring, a guide vane sleeve 5 is mounted outside the outer ring of the joint bearing 4, a drainage groove 6 is formed in a concave position in the middle of the outer ring of the joint bearing 4, the drainage groove 6 is used for collecting water leakage at the guide vane pivot 1, the water leakage is mainly water leakage caused by sealing failure due to long-term eccentric wear of the guide vane pivot 1 and an XY sealing surface, a drain hole 7 is formed in the lowest part of the guide vane sleeve 5, the drain hole 7 is communicated with the drainage groove 6, water leakage and diversion collected in the drainage groove 6 are discharged, a drain pipe of each guide vane is connected with an annular galvanized pipe arranged on a water guide mechanism of the unit, a straight pipe is arranged along a wall surface at the bottom of a galvanized ring pipe, and the drain pipe is tightly unable to leak water. Through the transformation of the guide vane sleeve and the arrangement of the drain pipe, the aims of guiding and draining the inside of the shaft sleeve for sealing water leakage and preventing the shaft sleeve from leaking and splashing are fulfilled.
The guide vane sleeve 5 is externally provided with a water collecting cover 8, the water collecting cover 8 is provided with a flushing hole 9, and the flushing hole 9 is communicated with a gap between the water collecting cover 8 and the guide vane sleeve 5. After the drain hole 7 on the guide vane sleeve 5 is blocked, the guide vane sleeve is flushed and dredged through the flushing hole 9, so that the drainage effect is improved. Meanwhile, the flushing hole 9 is also used for testing whether the sealing between the water collecting cover 8 and the guide vane sleeve 5 meets the requirements or not, and the test is carried out through pressurization, experiments and the like.
An outer water distribution ring 10 is further arranged outside the guide vane pivot 1, and the outer water distribution ring 10 is mainly used for fixing the guide vanes and guaranteeing flexible rotation of the guide vanes. A sealing sleeve 11 is arranged between the outer water distribution ring 10 and the boss 3, a shaft YX-type sealing ring 12 is arranged between the sealing sleeve 11 and the guide vane pivot 1, and the shaft XY-type sealing ring 12 is eccentric-ground due to the gravity of the guide vane pivot 1, so that water seepage is easy to occur. In some embodiments, in order to further enhance the sealing effect of the XY-shaped sealing ring 12, O-shaped sealing rings are respectively arranged on two sides of the sealing sleeve 11, and the O-shaped sealing rings are matched with the XY-shaped sealing ring 12, so that abrasion of the XY-shaped sealing ring 12 is reduced, and the sealing performance of the sealing sleeve 11 is enhanced.
A V-shaped sealing ring 13 is arranged between the outer ring of the knuckle bearing 4 and the guide vane arm 2, and polyurethane rubber can be adopted to improve the wear resistance of the V-shaped sealing ring 13. The V-shaped sealing ring 13 is mainly used for enhancing the tightness between the outer ring of the knuckle bearing 4 and the lower side of the guide vane arm 2 and reducing seepage from the guide vane arm 2 to the outside.
A first annular groove is formed in one side, close to the joint bearing 4, of the guide vane sleeve 5, and a first sealing ring 14 is installed in the first annular groove, and in a specific embodiment, the first sealing ring 14 can be an O-shaped sealing ring, so that the tightness between the outer ring of the joint bearing 4 and the guide vane sleeve 5 is enhanced. The water collecting cover 8 is internally provided with a second annular groove and a third annular groove, and a second sealing ring 15 and a dust-proof ring 16 are respectively arranged in the second annular groove and the third annular groove. In some embodiments, the second seal 15 may also be an O-ring, and the dust ring 16 may be used to prevent dust or debris from entering the rotating component, thereby reducing abrasive wear.
A fourth annular groove is arranged in the water collecting cover 8 and between the second annular groove and the third annular groove, and a rotary sealing ring 17 for the shaft is arranged in the fourth annular groove. A third sealing ring 20 is arranged between the guide vane sleeve 5 and the outer water distribution ring 10, and the third sealing ring 20 is an O-shaped sealing ring generally, so that the tightness between the outer water distribution ring 10 and the bottom of the guide vane sleeve 5 is enhanced.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (7)
1. The utility model provides a hydroelectric set stator spindle nose collection device that leaks which characterized in that: the novel guide vane structure comprises a guide vane pivot (1), wherein a guide vane arm (2) is arranged outside the guide vane pivot (1) and close to the end part of the guide vane pivot (1), the guide vane pivot (1) is provided with a boss (3), a joint bearing (4) is arranged between the guide vane arm (2) and the boss (3) in a clamping way, a guide vane sleeve (5) is arranged outside the joint bearing (4), a drainage groove (6) is formed in a concave part in the middle of an outer ring of the joint bearing (4), the drainage groove (6) is used for collecting water leakage at the guide vane pivot (1), and a water collecting cover (8) is arranged outside the guide vane sleeve (5);
A drain hole (7) is formed in the lowest position of the guide vane sleeve (5), and the drain hole (7) is communicated with the drain groove (6);
a flushing hole (9) is formed in the water collecting cover (8), and the flushing hole (9) is communicated with a gap between the water collecting cover (8) and the guide vane sleeve (5);
After the drain hole (7) on the guide vane sleeve (5) is blocked, the drain hole (7) is flushed and dredged through the flushing hole (9);
A second annular groove and a third annular groove are formed in the water collecting cover (8), and a second sealing ring (15) and a dust ring (16) for enhancing the sealing performance between the guide vane sleeve (5) and the water collecting cover (8) are respectively arranged in the second annular groove and the third annular groove;
A fourth annular groove is formed in the water collecting cover (8) and located between the second annular groove and the third annular groove, and a rotary sealing ring (17) for the shaft, which is used for reinforcing the sealing performance between the guide vane sleeve (5) and the outer water distribution ring (10), is installed in the fourth annular groove.
2. The hydroelectric generating set guide vane head water leakage collection device according to claim 1, wherein: the outer water distribution ring (10) is arranged outside the guide vane pivot (1), and a sealing sleeve (11) is arranged between the outer water distribution ring (10) and the boss (3).
3. The hydroelectric generating set guide vane head water leakage collection device according to claim 2, wherein: and a YX-type sealing ring (12) for a shaft is arranged between the sealing sleeve (11) and the guide vane pivot (1).
4. The water leakage collection device for the guide vane shaft head of the water turbine generator set according to claim 3, wherein: and a V-shaped sealing ring (13) is arranged between the outer ring of the knuckle bearing (4) and the guide vane arm (2).
5. The water leakage collection device for the guide vane shaft head of the hydroelectric generating set according to claim 4, wherein: the guide vane sleeve (5) is provided with a first annular groove at one side close to the joint bearing (4), and a first sealing ring (14) is arranged in the first annular groove.
6. The hydroelectric generating set guide vane head water leakage collection device according to claim 1, wherein: an end cover (18) is mounted at the end part of the guide vane pivot (1) through a bolt (19), and a combined sealing gasket is arranged between the bolt (19) and the end cover (18).
7. The water leakage collection device for the guide vane shaft head of the hydroelectric generating set according to claim 4, wherein: a third sealing ring (20) is arranged between the guide vane sleeve (5) and the outer water distribution ring (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110907516.4A CN113803202B (en) | 2021-08-09 | 2021-08-09 | Water leakage collecting device for guide vane shaft head of hydroelectric generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110907516.4A CN113803202B (en) | 2021-08-09 | 2021-08-09 | Water leakage collecting device for guide vane shaft head of hydroelectric generating set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113803202A CN113803202A (en) | 2021-12-17 |
| CN113803202B true CN113803202B (en) | 2024-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110907516.4A Active CN113803202B (en) | 2021-08-09 | 2021-08-09 | Water leakage collecting device for guide vane shaft head of hydroelectric generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113803202B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115779322A (en) * | 2022-12-26 | 2023-03-14 | 浙江龙鼎消防器材有限公司 | Stable form fire control shower nozzle frame |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4277221A (en) * | 1976-04-22 | 1981-07-07 | Dominion Engineering Works Limited | Wicket gate bearing seal |
| JPH03206366A (en) * | 1990-01-08 | 1991-09-09 | Hitachi Ltd | Sealing water construction of bearing part for fluid machine |
| CN203614307U (en) * | 2013-09-27 | 2014-05-28 | 怀化沅江电力开发有限责任公司洪江水力发电厂 | Water turbine guide vane outer shaft sleeve with multi-stage waterstop seal |
| CN108005835A (en) * | 2018-01-25 | 2018-05-08 | 东方电气集团东方电机有限公司 | A kind of tubular turbine guide vane supporting and regulating device |
| CN207513728U (en) * | 2017-09-30 | 2018-06-19 | 湖南云箭集团有限公司 | A kind of wicket gate seal device of tubular turbine |
| CN110285073A (en) * | 2019-06-27 | 2019-09-27 | 广州市昕恒泵业制造有限公司 | High reliability immersible pump |
-
2021
- 2021-08-09 CN CN202110907516.4A patent/CN113803202B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4277221A (en) * | 1976-04-22 | 1981-07-07 | Dominion Engineering Works Limited | Wicket gate bearing seal |
| JPH03206366A (en) * | 1990-01-08 | 1991-09-09 | Hitachi Ltd | Sealing water construction of bearing part for fluid machine |
| CN203614307U (en) * | 2013-09-27 | 2014-05-28 | 怀化沅江电力开发有限责任公司洪江水力发电厂 | Water turbine guide vane outer shaft sleeve with multi-stage waterstop seal |
| CN207513728U (en) * | 2017-09-30 | 2018-06-19 | 湖南云箭集团有限公司 | A kind of wicket gate seal device of tubular turbine |
| CN108005835A (en) * | 2018-01-25 | 2018-05-08 | 东方电气集团东方电机有限公司 | A kind of tubular turbine guide vane supporting and regulating device |
| CN110285073A (en) * | 2019-06-27 | 2019-09-27 | 广州市昕恒泵业制造有限公司 | High reliability immersible pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113803202A (en) | 2021-12-17 |
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