CN202300798U - Center air compensating valve of main shaft of large water turbine - Google Patents
Center air compensating valve of main shaft of large water turbine Download PDFInfo
- Publication number
- CN202300798U CN202300798U CN2011204520346U CN201120452034U CN202300798U CN 202300798 U CN202300798 U CN 202300798U CN 2011204520346 U CN2011204520346 U CN 2011204520346U CN 201120452034 U CN201120452034 U CN 201120452034U CN 202300798 U CN202300798 U CN 202300798U
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- Prior art keywords
- valve
- main shaft
- water turbine
- bolt
- air compensating
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- 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 39
- 238000005273 aeration Methods 0.000 claims description 39
- 238000007789 sealing Methods 0.000 claims description 14
- 210000004907 gland Anatomy 0.000 claims description 5
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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Classifications
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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
- Y02E10/20—Hydro energy
Abstract
The utility model discloses a center air compensating valve of a main shaft of a large water turbine. The valve is characterized in that a first seal gasket (3), a pressing plate (4), a valve cover (5), a first bolt (6), a bearing (7), a spring (8), a valve shaft (9), a pressing sleeve (10), a second bolt (11), a second seal gasket (12) and a valve canopy (13) which are sequentially connected are connected to a valve body (2) through a third bolt (14) so as to form an air compensating valve (1); the air compensating valve is a one-way valve, is of a horizontal structure, and is positioned in a closed air compensating chamber arranged on a walking platform on the lower part of the water turbine; one end of the air compensating chamber is communicated with outdoor atmosphere through an air compensating pipe, and the other end of the air compensating chamber is communicated with the radial hole of the flange of the main shaft for the water turbine. According to the utility model, a mode is adopted, namely air is compensated for the tail water pipe of the water turbine by virtue of the radial hole of the flange of the main shaft for the water turbine through an air compensating check valve, and the air compensating mode is efficient for compensating air. The center air compensating valve disclosed by the utility model has small operation noises, and is stable and safe to use.
Description
Technical field
The utility model relates to the aeration valve that the aeration valve that a kind of water turbine is used, particularly large-scale water turbine are used.
Background technique
The air supplement of turbine system is the important corollary system that guarantees Hydropower Unit stable operation, and aeration valve is to play the critical component that water-stop was regulated and returned in tonifying Qi in this system.Usually, aeration valve is installed on generator apical axis upper end, valve body exocoel and atmosphere UNICOM, and inner chamber is through shaft system of unit endoporus and water turbine runner UNICOM.When unsettled vaccum working condition occurring in the hydraulic turbine operation, valve is opened under the exocoel differential pressure action in blowdown pipe automatically, in turbine draft tube, mends air, improves set steady property.The valve opening size depends on the degree of vacuum value, vacuum expendable pattern, and then valve is closed under the spring force effect of self disposing automatically.When unit was in shutdown or some specific operation, downstream tail water can recoil to generator apical axis place along turbine shaft and generator shaft endoporus, is called " returning water ".Aeration valve should return under the water effect fast, reliably close this moment, to prevent the going out safe operation of threat generator because of returning water.Water turbine with aeration valve commonly used several kinds of patterns are arranged, like float-ball type, suction disc formula, floating-tube type etc.The negative pressure suction disc formula that is that the present invention relates to.The air supplement of turbine valve was installed on generator apical axis place in the past; When in the unit operation during tonifying Qi; Big the healthy of operations staff that influence of noise in the factory building not only; And tonifying Qi chamber, generator end occurs and scurry water (randomness), cause Generator's Rotor Circuit (slip ring) insulation sharply to descend, force unit normally not to be incorporated into the power networks by the traffic order start.Along with the continuous increase of Hydropower Unit capacity and size in recent years, the aeration valve of traditional form in use exposes several respects problem successively: the one, and air compensation is not enough, is unfavorable for effectively eliminating vacuum, ensures stable; The 2nd, close poor reliability, directly reduce the whole reliability of unit, influence unit safety; The 3rd, vibration is big, and controllability is poor.
The model utility content
The technology of the utility model is dealt with problems and is: overcome the deficiency of existing technology, a kind of main shaft of large water turbine center aeration valve is provided.
The technical solution of the utility model is: the main shaft of large water turbine center aeration valve that the utility model provides; It is characterized in that: first sealing gasket (3) that connects successively, pressing plate (4), valve gap (5), first bolt (6), bearing (7), spring (8), valve shaft (9), gland (10), second bolt (11), second sealing gasket (12) and valve hat (13) are connected on the valve body (2) through the 3rd bolt (14); Constitute aeration valve (1), this aeration valve is an one-way valve.
This aeration valve is fixedly connected with hydraulic turbine main shaft upper flange exterior arc surface.
This aeration valve valve body is fixedly connected with hydraulic turbine main shaft upper flange exterior arc surface through fixing bolt, and said first sealing gasket (3) is housed between valve seat and flange cylindrical.
This aeration valve is a horizontal type structure, and it is positioned at the airtight tonifying Qi chamber of walking on stage and upward be provided with in the water turbine bottom (19), and tonifying Qi chamber (19) one ends communicate with outside atmosphere through blowdown pipe (20), and tonifying Qi chamber (19) the other end is communicated with the radial hole (18) of hydraulic turbine main shaft flange.
Said valve hat (13) is taper.
Further, said first sealing gasket (3) is fixed on the said valve hat (13) through said first bolt (6) with said pressing plate (4), and said valve hat (13) is fixed on an end of said valve shaft (9), and the other end of said valve shaft (9) connects said valve gap (5).Spring (8), gland (10) are fastening with said second bolt (11).
The utility model compared with prior art has following advantage:
(1) the main shaft of large water turbine center aeration valve of the utility model is a horizontal type structure; It is indoor that this aeration valve is positioned at the walk on stage airtight tonifying Qi that go up to be provided with of water turbine bottom; Tonifying Qi chamber one end communicates with outside atmosphere through blowdown pipe, and the tonifying Qi chamber the other end is communicated with the radial hole of hydraulic turbine main shaft flange.Take radial hole by the hydraulic turbine main shaft flange through the mode of tonifying Qi check valve to the turbine draft tube tonifying Qi, the tonifying Qi of this tonifying Qi mode is more effective, and the operation noise is little, more stable, it is safer to use.
(2) the utility model is simple in structure; Quantity through adjustment water turbine flange horizontal plane tonifying Qi hole and diameter make that the area of passage coupling is more reasonable in the runner everywhere, realize that runner integral body is evenly smooth and easy, reduce the air current flow loss; Realize big flow tonifying Qi; Not only shortened the gas flow process, and eliminated the factory building noise, and repair and maintenance is convenient.
(3) the utility model is an one-way valve structures, and the current in the turbine draft tube can oppositely not flow to turbine chamber, influence unit and normally move.
Description of drawings
Fig. 1 is a water turbine center hole air compensating system schematic representation;
Fig. 2 is the axial erection drawing of water turbine center aeration valve;
Fig. 3 is a water turbine center aeration valve radially loading figure;
Fig. 4 is a tonifying Qi valve gap structural drawing.
Figure number explanation: 1-aeration valve, 2-valve body, 3-first sealing gasket, 4-pressing plate, 5-valve gap, 6-first bolt; The 7-bearing, 8-spring, 9-valve shaft, 10-gland, 11-second bolt, 12-second sealing gasket; 13-mitre velve hat, 14-the 3rd bolt, 18-radial hole, 19-tonifying Qi chamber, 20-blowdown pipe; 21-turbine shaft endoporus, 22-rotary wheel of water turbine, 23-turbine draft tube, 24-generator shaft, 25-turbine shaft.
Embodiment
Below will combine accompanying drawing that the embodiment of the utility model is described.
As shown in Figure 1; The main shaft of large water turbine center aeration valve of the utility model is a horizontal type structure; This aeration valve is positioned at the airtight tonifying Qi chamber of walking on stage and upward be provided with in the water turbine bottom 19; Tonifying Qi chamber 19 1 ends communicate with outside atmosphere through blowdown pipe 20, and tonifying Qi chamber 19 the other ends are communicated with the radial hole 18 of hydraulic turbine main shaft flange.Take by tonifying Qi chamber 19 through aeration valve 26 through the radial hole 18 of hydraulic turbine main shaft flange, turbine shaft endoporus 18 mode to turbine draft tube 23 tonifying Qi, the tonifying Qi of this tonifying Qi mode is more effective, and the operation noise is little, more stable, it is safer to use.
This aeration valve valve body is fixedly connected with hydraulic turbine main shaft upper flange exterior arc surface through fixing bolt, and said first sealing gasket 3 is housed between valve seat and flange cylindrical.
The structure of main shaft of large water turbine center aeration valve is: as shown in Figure 2; First sealing gasket 3 that connects successively, pressing plate 4, valve gap 5, first bolt 6, bearing 7, spring 8, valve shaft 9, gland 10, second bolt 11, second sealing gasket 12 and mitre velve hat 13 are connected on the valve body 2 through the 3rd bolt 14, constitute aeration valve 1.
Said first sealing gasket 3 is fixed on the said valve hat 13 through said first bolt 6 with said pressing plate 4; Said valve hat 13 is fixed on an end of said valve shaft 9; The other end of said valve shaft 9 connects said valve gap 5, and spring 8, said second bolt 11 of gland 10 usefulness are fastening.
Fig. 3 is a water turbine center aeration valve radially loading figure, and Fig. 4 is a tonifying Qi valve gap structural drawing.
Axle center hole blocks in the generator upper end.When the pressure in the turbine draft tube was higher than barometric pressure, valve was closed by initial tension of spring, in turbine draft tube, produced negative pressure; Be pressure when being lower than barometric pressure, valve plug overcomes the elastic force of spring under the draft tube action of negative pressure, and check valve is opened automatically; The indoor air of tonifying Qi is along radially vent and the spindle hole tonifying Qi in draft tube of aeration valve, water turbine flange; Destroy the vacuum in the draft tube, weaken the pressure pulsation in the draft tube, make unit safety stable operation.
The utility model is not limited to the content that claim and the foregoing description are addressed, so long as any invention of creating out according to design of the present invention all should belong within the protection domain of the utility model.
Claims (6)
1. main shaft of large water turbine center aeration valve; It is characterized in that: first sealing gasket (3) that connects successively, pressing plate (4), valve gap (5), first bolt (6), bearing (7), spring (8), valve shaft (9), gland (10), second bolt (11), second sealing gasket (12) and valve hat (13) are connected on the valve body (2) through the 3rd bolt (14); Constitute aeration valve (1), this aeration valve is an one-way valve.
2. main shaft of large water turbine according to claim 1 center aeration valve is characterized in that: this aeration valve is fixedly connected with hydraulic turbine main shaft upper flange exterior arc surface.
3. main shaft of large water turbine according to claim 2 center aeration valve is characterized in that: this aeration valve valve body is fixedly connected with hydraulic turbine main shaft upper flange exterior arc surface through fixing bolt, and said first sealing gasket (3) is housed between valve seat and flange cylindrical.
4. main shaft of large water turbine according to claim 1 and 2 center aeration valve; It is characterized in that: this aeration valve is a horizontal type structure; It is positioned at the airtight tonifying Qi chamber of walking on stage and upward be provided with in the water turbine bottom (19); Tonifying Qi chamber (19) one ends communicate with outside atmosphere through blowdown pipe (20), and tonifying Qi chamber (19) the other end is communicated with the radial hole (18) of hydraulic turbine main shaft flange.
5. main shaft of large water turbine according to claim 1 center aeration valve is characterized in that: said valve hat (13) is taper.
6. main shaft of large water turbine according to claim 5 center aeration valve; It is characterized in that: said first sealing gasket (3) is fixed on the said valve hat (13) through said first bolt (6) with said pressing plate (4); Said valve hat (13) is fixed on an end of said valve shaft (9), and the other end of said valve shaft (9) connects said valve gap (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204520346U CN202300798U (en) | 2011-11-15 | 2011-11-15 | Center air compensating valve of main shaft of large water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204520346U CN202300798U (en) | 2011-11-15 | 2011-11-15 | Center air compensating valve of main shaft of large water turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202300798U true CN202300798U (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204520346U Expired - Fee Related CN202300798U (en) | 2011-11-15 | 2011-11-15 | Center air compensating valve of main shaft of large water turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202300798U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156256A (en) * | 2015-09-29 | 2015-12-16 | 国家电网公司 | Air supplementing structure for runner blades for water turbine |
| CN110332130A (en) * | 2019-07-17 | 2019-10-15 | 福建福清核电有限公司 | A kind of online device and method for improving reactor coolant pump shafting stability |
| CN110671254A (en) * | 2019-11-15 | 2020-01-10 | 云南电网有限责任公司电力科学研究院 | System for weakening pressure pulsation of draft tube of hydroelectric generating set |
| CN114526185A (en) * | 2021-12-20 | 2022-05-24 | 杭州力源发电设备有限公司 | Self-adaptive control anti-cavitation pump turbine |
-
2011
- 2011-11-15 CN CN2011204520346U patent/CN202300798U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156256A (en) * | 2015-09-29 | 2015-12-16 | 国家电网公司 | Air supplementing structure for runner blades for water turbine |
| CN110332130A (en) * | 2019-07-17 | 2019-10-15 | 福建福清核电有限公司 | A kind of online device and method for improving reactor coolant pump shafting stability |
| CN110671254A (en) * | 2019-11-15 | 2020-01-10 | 云南电网有限责任公司电力科学研究院 | System for weakening pressure pulsation of draft tube of hydroelectric generating set |
| CN114526185A (en) * | 2021-12-20 | 2022-05-24 | 杭州力源发电设备有限公司 | Self-adaptive control anti-cavitation pump turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: FENGMAN POWER PLANT Effective date: 20130608 Owner name: STATE GRID XINYUAN HYDROELECTRIC COMPANY LIMITED F Effective date: 20130608 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 132108 JILIN, JILIN PROVINCE TO: 100031 XICHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130608 Address after: 100031 Xicheng District, Chang'an Avenue, No. 86, Patentee after: State Grid Corporation of China Patentee after: State Grid Xinyuan Hydropower Co., Ltd. Patentee after: Fengman Power Plant Address before: Fengman District Fengcheng street 132108 Jilin city of Jilin province No. 2 Patentee before: Fengman Power Plant |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20191115 |