CN220869561U - Sealing structure of guide vane shaft sleeve of water turbine - Google Patents
Sealing structure of guide vane shaft sleeve of water turbine Download PDFInfo
- Publication number
- CN220869561U CN220869561U CN202322429595.XU CN202322429595U CN220869561U CN 220869561 U CN220869561 U CN 220869561U CN 202322429595 U CN202322429595 U CN 202322429595U CN 220869561 U CN220869561 U CN 220869561U
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- China
- Prior art keywords
- guide vane
- sealing
- sleeve
- shaft
- movable guide
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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 230000006835 compression Effects 0.000 claims abstract description 8
- 238000007906 compression Methods 0.000 claims abstract description 8
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000004080 punching Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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
Landscapes
- Hydraulic Turbines (AREA)
Abstract
The utility model discloses a sealing structure of a guide vane shaft sleeve of a water turbine, which comprises a movable guide vane shaft and further comprises: the top cover is sleeved on the movable guide vane shaft; the shaft sleeve is arranged on the movable guide vane shaft in a sealing manner, and the shaft sleeve is positioned between the top cover and the movable guide vane shaft; the compression ring is arranged on the movable guide vane shaft in a sealing manner and is used for sealing and fixing the shaft sleeve on the top cover; the pressing hole is formed in the way of axially penetrating through the pressing ring, and the pressing hole is communicated with the shaft sleeve and the movable guide vane shaft in a sealing way. The sealing structure is provided with the sealing punching hole, so that the sealing effect can be checked after the installation is finished, and the equipment problem can be found in advance.
Description
Technical Field
The utility model relates to the technical field of water turbines, in particular to a sealing structure of a guide vane shaft sleeve of a water turbine.
Background
The movable guide vane of the water turbine is an important component part of the water turbine, and shaft sleeves (bearings) are arranged at two ends of the movable guide vane in order to ensure the normal action of the movable guide vane. In order to prevent abnormal leakage of water flow in the water turbine, a seal is arranged at the shaft sleeve of the movable guide vane. According to the size and the structural characteristics of the water turbine, the existing shaft sleeve is sealed with a single sealing structure and also has various combined sealing structures.
The defects are that: after the sealing installation, the sealing effect cannot be checked, whether water leakage occurs or not can be found only after the water turbine is filled with water, and the lower shaft sleeve is positioned in the water turbine, so that even if water leakage occurs, the water leakage cannot be found. The water leakage can cause cavitation erosion of related parts or bring silt into the shaft sleeve, so that the shaft sleeve is abnormally worn, and the equipment cannot normally operate.
More seriously, if the upper shaft sleeve leaks too much, serious risks such as flooding of the unit can be caused. And when the shaft sleeve is treated and leaked, the unit is required to be drained, the treatment period is long, and the power generation operation of the unit can be seriously affected. More seriously, the movable guide vane must be dismantled for replacing the sealing of the lower shaft sleeve of the guide vane, and the condition is that the unit A-level overhaul is only available. For large units, typically class a service periods exceed 100 days, a loss that is not affordable for hydropower stations.
Disclosure of utility model
The utility model aims to provide a sealing structure of a guide vane sleeve of a water turbine, which aims to solve the technical problems in the background art.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
The utility model provides a hydraulic turbine stator axle sleeve seal structure, includes movable stator axle, still includes:
the top cover is sleeved on the movable guide vane shaft;
The shaft sleeve is arranged on the movable guide vane shaft in a sealing manner, and the shaft sleeve is positioned between the top cover and the movable guide vane shaft;
the compression ring is arranged on the movable guide vane shaft in a sealing manner and is used for sealing and fixing the shaft sleeve on the top cover;
The pressing hole is formed in the way of axially penetrating through the pressing ring, and the pressing hole is communicated with the shaft sleeve and the movable guide vane shaft in a sealing way.
In some embodiments, a primary seal ring is disposed between the lower portion of the sleeve and the movable vane shaft.
In some embodiments, a first auxiliary seal ring is provided between the upper portion of the sleeve and the movable vane shaft.
In some embodiments, a second auxiliary sealing ring is arranged between the upper part of the shaft sleeve and the compression ring.
In some embodiments, the primary seal, the first secondary seal, and the second secondary seal form a seal cavity therebetween.
Compared with the prior art, the utility model has the following beneficial effects:
1. The sealing punching holes are formed, so that the sealing effect can be checked after the installation is finished, and the equipment problem can be found in advance;
2. The sealing pressing holes are formed, and the pressing test can be periodically carried out after the equipment is operated for a period of time, so that the state of the equipment can be accurately judged, and a basis is provided for equipment maintenance planning;
3. the sealing and punching holes are formed, and the sealing and punching device can be used as a main sealing effect monitoring device after equipment is put into operation, so that defects can be found in time, long-term disease-carrying operation of the equipment is avoided, and failure damage is enlarged;
4. The sealing device is provided with a main sealing device and an auxiliary sealing device, when the main sealing is damaged, the sealing and punching holes are sealed, and the auxiliary sealing can be utilized to seal water until the processing conditions are met.
Drawings
Fig. 1: schematic diagram of sealing structure of guide vane sleeve of water turbine;
Fig. 2: an enlarged view of a of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the preferred embodiments of the present application will be described in more detail with reference to the accompanying drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals refer to the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the application. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be fixedly connected, or indirectly connected through intermediaries, for example, or may be in communication with each other between two elements or in an interaction relationship between the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship of the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or display that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or display.
The following will describe in detail a sealing structure of a guide vane sleeve of a water turbine according to an embodiment of the present application with reference to fig. 1-2. It is noted that the following examples are only for explaining the present application and are not to be construed as limiting the present application.
Example 1:
1-2, the sealing structure of the guide vane sleeve of the water turbine comprises a movable guide vane shaft 1, a top cover 2, a sleeve 3, a compression ring 8 and a punching hole 4, wherein the top cover is sleeved on the movable guide vane shaft; the shaft sleeve is sealed and sleeved on the movable guide vane shaft and can perform rotary motion; the shaft sleeve is positioned between the top cover and the movable guide vane shaft; a main sealing ring 7 is arranged between the lower part of the shaft sleeve and the movable guide vane shaft. A first auxiliary sealing ring 6 is arranged between the upper part of the shaft sleeve and the movable guide vane shaft.
The compression ring is sealed and arranged on the movable guide vane shaft and used for sealing and fixing the shaft sleeve on the top cover; a second auxiliary sealing ring 5 is arranged between the upper part of the shaft sleeve and the compression ring. The punching hole is formed in the way of axially penetrating through the pressing ring, and is formed among the sealing cavity formed by the main seal, the first auxiliary sealing ring and the second auxiliary sealing ring. And the pressing hole is communicated with the shaft sleeve and the movable guide vane shaft in a sealing way.
According to the application, a set of auxiliary seal and a punching hole are added on the existing movable guide vane shaft sleeve seal, and after the seal installation is completed, the seal effect can be checked, so that the problem is found in advance, and the risk is avoided. And does not adversely affect the movable vane sleeve.
Since the movable vane spindle 1 is to perform a rotational movement in the hub 3, a gap is necessary between the movable vane spindle 1 and the hub 3, and a main seal ring 7 is provided between the movable vane spindle 1 and the hub 3 in order to prevent leakage of water flow. The first auxiliary sealing ring 6 and the second auxiliary sealing ring 5 are conventional O-rings. After the sealing is installed, the sealing cavity is pressurized with water pressure through the sealing pressurizing hole 4, and the water pressure is consistent with the water pressure born by the lower part of the main seal 7 when the water turbine runs. Through hydrostatic test, can verify the sealed effect of movable guide vane axle sleeve, avoid the unit to fill water and just can verify sealed effect's problem.
Due to the fact that the main sealing ring 7, the first auxiliary sealing ring 6 and the second auxiliary sealing ring 5 are arranged, after the machine set is put into operation, whether the main sealing ring 7 is damaged or not can be judged from the water outlet condition of the sealing and pressing hole 4, and defects can be found timely. After the sealing and pressing hole 4 is blocked, the auxiliary sealing is utilized to ensure that the equipment continues to operate until the processing conditions are met.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (5)
1. The utility model provides a hydraulic turbine stator axle sleeve seal structure, includes movable stator axle, its characterized in that still includes:
the top cover is sleeved on the movable guide vane shaft;
The shaft sleeve is arranged on the movable guide vane shaft in a sealing manner, and the shaft sleeve is positioned between the top cover and the movable guide vane shaft;
the compression ring is arranged on the movable guide vane shaft in a sealing manner and is used for sealing and fixing the shaft sleeve on the top cover;
The pressing hole is formed in the way of axially penetrating through the pressing ring, and the pressing hole is communicated with the shaft sleeve and the movable guide vane shaft in a sealing way.
2. The sealing structure of a guide vane sleeve of a water turbine according to claim 1, wherein a main sealing ring is arranged between the lower part of the sleeve and the movable guide vane shaft.
3. The sealing structure of a guide vane shaft sleeve of a water turbine according to claim 1, wherein a first auxiliary sealing ring is arranged between the upper part of the shaft sleeve and the movable guide vane shaft.
4. The guide vane sleeve sealing structure of the water turbine according to claim 3, wherein a second auxiliary sealing ring is arranged between the upper part of the sleeve and the compression ring.
5. The guide vane sleeve sealing structure of a water turbine according to claim 4, wherein the pressing hole is formed among a sealing cavity formed by the main seal, the first auxiliary sealing ring and the second auxiliary sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322429595.XU CN220869561U (en) | 2023-09-07 | 2023-09-07 | Sealing structure of guide vane shaft sleeve of water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322429595.XU CN220869561U (en) | 2023-09-07 | 2023-09-07 | Sealing structure of guide vane shaft sleeve of water turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220869561U true CN220869561U (en) | 2024-04-30 |
Family
ID=90815719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322429595.XU Active CN220869561U (en) | 2023-09-07 | 2023-09-07 | Sealing structure of guide vane shaft sleeve of water turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220869561U (en) |
-
2023
- 2023-09-07 CN CN202322429595.XU patent/CN220869561U/en active Active
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| GR01 | Patent grant |