CN208587250U - A kind of huge Francis hydroturbine generator set main-shaft core blowdown pipe structure - Google Patents
A kind of huge Francis hydroturbine generator set main-shaft core blowdown pipe structure Download PDFInfo
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- CN208587250U CN208587250U CN201721757198.3U CN201721757198U CN208587250U CN 208587250 U CN208587250 U CN 208587250U CN 201721757198 U CN201721757198 U CN 201721757198U CN 208587250 U CN208587250 U CN 208587250U
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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
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Abstract
The utility model provides a kind of huge Francis hydroturbine generator set main-shaft core blowdown pipe structure, blowdown pipe including subsection setup, first blowdown pipe lower end and the second blowdown pipe upper end pass through third flanged joint, third flange is fixed with generator upper shaft upper end, second blowdown pipe lower end and third blowdown pipe upper end pass through the 4th flanged joint, 4th blowdown pipe upper end and the 5th blowdown pipe upper end pass through first flange and second flange respectively and connect with upper fixed support plate and lower fixed support plate, the lower end of third blowdown pipe inserts the connecting pin into first flange, the lower end of 4th blowdown pipe inserts the connecting pin into second flange, contact surface between third blowdown pipe and first flange and the 4th blowdown pipe and second flange is equipped with sealing ring, the lower end of 5th blowdown pipe inserts in circumferential support and sealing ring is arranged on contact surface.The structure may be implemented to dismount from top completely, and convenient for disassembly and assembly, connection is reliable.
Description
Technical field
The utility model belongs to hydrogenerator apparatus field, in particular to a kind of huge Francis hydroturbine generator set master
Axis center blowdown pipe structure.
Background technique
With the construction of the large hydraulic engineerings such as Three Gorges Dam, small stream Luo Du and Burner zone, the utilization of water resource is increasingly
It is taken seriously, and the technical research level of water conservancy generator influences the effective use of water resource to a certain extent.Mixed-flow
Hydraulic turbine structure, main-shaft core is equipped with blowdown pipe as hydraulic turbine nature tonifying Qi, and is mounted on the huge water in underground power house
Turbine generator group buried depth is larger (part power station highest tailwater level is compared with the generator center high 40m of elevation), if main-shaft core blowdown pipe
Seal failure, river will leak into inside main shaft or even more than generator amature, will seriously threaten unit safety, above-mentioned each power station
Set main shaft center blowdown pipe configurations due to unit size, design producer habit are different.But in most set main shaft
There are seal leakage, tube coupling and bolt corrosion, tube couplings to fall off during operation and maintenance for heart blowdown pipe, dismounts the problems such as difficulty,
And set main shaft center blowdown pipe the problem of being primarily present are as follows: (1) blowdown pipe all can not dismount (part of generating units tonifying Qi from top
Pipe latter end is inverted structure), dismounting is difficult, and sealing replacement is difficult；(2) blowdown pipe latter end fixed form is unreliable, is shaken by unit
The factors such as dynamic, tail water pressure fluctuation influence, and part of generating units falls off problem；(3) blowdown pipe connection uses plug-in mounting structure, sealing
Facade twice " Ο " type ring structure is taken, reliability is lower, leakage problems occurs in multiple power stations；(4) blowdown pipe knot
Structure design does not consider each position sealing access path, after partial portion sealing installation can not Inspection and maintenance, in During Process of Long-term Operation
In there are larger security risks.
Summary of the invention
The technical problem to be solved by the utility model is to provide a kind of huge Francis hydroturbine generator set main-shaft cores
Blowdown pipe structure may be implemented to dismount from top completely, and convenient for disassembly and assembly, connection is reliable.
A kind of in order to solve the above technical problems, the technical scheme adopted by the utility model is: huge mixed-flow wheel hair
Motor group main-shaft core blowdown pipe structure, the blowdown pipe including subsection setup, the blowdown pipe successively install tonifying Qi from top to bottom
Valve, float trap and Hand-operated butterfly valve, the blowdown pipe include the first blowdown pipe, the second blowdown pipe, third blowdown pipe, the 4th blowdown pipe
With the 5th blowdown pipe, the first blowdown pipe lower end and the second blowdown pipe upper end pass through third flanged joint, third flange and generator
Upper shaft upper end is fixed, and the second blowdown pipe lower end and third blowdown pipe upper end pass through the 4th flanged joint, the 4th blowdown pipe upper end
Pass through first flange and second flange respectively with the 5th blowdown pipe upper end to connect with upper fixed support plate and lower fixed support plate, on
Fixed support plate and lower fixed support plate are fixed in turbine shaft, and the lower end of third blowdown pipe inserts the connection into first flange
End, the lower end of the 4th blowdown pipe inserts the connecting pin into second flange, third blowdown pipe and first flange and the 4th blowdown pipe
Sealing ring is equipped on contact surface between second flange, the lower end of the 5th blowdown pipe inserts the circumferential direction support into runner upper end
Sealing ring is set on interior and contact surface.
In preferred scheme, the contact surface upper end of the first flange and third blowdown pipe is equipped with the first seal groove, and second
The contact surface upper end of flange and the 4th blowdown pipe is equipped with the second seal groove, is equipped with sealing in the first seal groove and the second seal groove
The upper end of pad, gasket is compressed by gland.
In further embodiment, the gasket is multiple layer combination gasket.
In preferred scheme, the generator lower end axis upper end is equipped with the annular backup pad cooperated with the 4th flange, annular
Support plate provides circumferential support for the 4th flange.
In preferred scheme, the support plate is equipped with the first manhole, on upper fixed support plate and lower fixed support plate
It is equipped with the second manhole, sealing cover is arranged in the second manhole upper end.
In preferred scheme, turbine shaft water dumping detection hole is set, under the axis of generator lower end in turbine shaft upper flanges
End flanges are equipped with generator shaft water dumping detection hole.
In preferred scheme, sealing ring is equipped on the joint face of the third flange and the 4th flange.
In preferred scheme, the joint face and second flange of the first flange and upper fixed support plate and lower fixed branch
Sealing ring is equipped on the joint face of fagging.
A kind of huge Francis hydroturbine generator set main-shaft core blowdown pipe structure provided by the utility model, by using
The above structure has the advantages that
1, blowdown pipe integrally using dress in segmentation, on the structure torn open.Blowdown pipe is in runner and turbine shaft, generator lower end
It is respectively provided with segmentation in axis, generator amature and generator upper shaft, ensures that blowdown pipe can be installed smoothly, be torn open in structure size
It removes.
2, blowdown pipe internode is combined using flanged joint and plug-in mounting structure, may be implemented reliably to seal.
3, the gasket being arranged realizes the combination sealing mode of sealing ring and sealing ring, improves the degree of reliability of sealing,
Wherein, it is compressed because of gasket by gland, can be realized the quick-replaceable of gasket, do not need to dismantle entire blowdown pipe.
4, the swing for the annular backup pad air make-up limitation pipe being arranged, increases the service life of blowdown pipe.
5, the first manhole and the second manhole being arranged is tieed up convenient for the inspection at position each in spindle of hydroelectric generator set
Shield.
6, the turbine shaft water dumping detection hole and generator shaft water dumping detection hole being arranged can quickly judge percolating water position simultaneously
Carry out inspection processing.
The blowdown pipe structure meet can whole top dismounting, multi-stage sealed protection, significant points sealing can check, is replaceable
Requirement.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawings and examples:
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is the enlarged drawing in Fig. 1 at A.
Fig. 3 is the enlarged drawing in Fig. 1 at B.
Fig. 4 is the enlarged drawing in Fig. 1 at C.
Fig. 5 is the enlarged drawing in Fig. 1 at D.
In figure: blowdown pipe 1, aeration valve 2, ball-cock assembly 3, generator upper shaft 4, Hand-operated butterfly valve 5, generator amature 6, first
Manhole 7, generator lower end axis 8, generator shaft water dumping detection hole 9, turbine shaft water dumping detection hole 10, the second manhole 11,
Turbine shaft 12, runner 13, circumferential direction support 14, upper fixed support plate 15, lower fixed support plate 16, gasket 17, sealing ring 18,
Gland 19, annular backup pad 20, first flange 21, second flange 22, third flange 23, the 4th flange 24, the first blowdown pipe
101, the second blowdown pipe 102, third blowdown pipe 103, the 4th blowdown pipe 104, the 5th blowdown pipe 105, the first seal groove 2101, the
Two seal grooves 2201.
Specific embodiment
Embodiment 1: as shown in figure 1, a kind of huge Francis hydroturbine generator set main-shaft core blowdown pipe structure, including segmentation
The blowdown pipe 1 of setting, the blowdown pipe 1 include the first blowdown pipe 101, the second blowdown pipe 102, the benefit of third blowdown pipe the 103, the 4th
Tracheae 104 and the 5th blowdown pipe 105,101 lower end of the first blowdown pipe and 102 upper end of the second blowdown pipe are connected by third flange 23
It connects, third flange 23 is fixed with 4 upper end of generator upper shaft, and 102 lower end of the second blowdown pipe passes through with 103 upper end of third blowdown pipe
Sealing ring 18 is equipped on the joint face of the connection of 4th flange 24, third flange 23 and the 4th flange 24.
Axis 8 upper end in the generator lower end is equipped with the annular backup pad 20 cooperated with the 4th flange 24, annular backup pad 20
Circumferential support is provided for the 4th flange 24.
As shown in Figure 4 and Figure 5,104 upper end of the 4th blowdown pipe and 105 upper end of the 5th blowdown pipe pass through first flange 21 respectively
It is connect with second flange 22 with upper fixed support plate 15 and lower fixed support plate 16, upper fixed support plate 15 and lower fixed support plate
16 are fixed in turbine shaft 12, and as shown in Figure 3, lower fixed support plate 16 is bolted with turbine shaft 12, connection
Face is equipped with sealing ring 18.The lower end of third blowdown pipe 103 inserts the connecting pin into first flange 21, the 4th blowdown pipe 104
Lower end inserts the connecting pin into second flange 22, and it is close that the contact surface upper end of first flange 21 and third blowdown pipe 103 is equipped with first
The contact surface upper end of sealing groove 2101, second flange 22 and the 4th blowdown pipe 104 is equipped with the second seal groove 2201, the first seal groove
2101 and second are equipped with gasket 17 in seal groove 2201, and the upper end of gasket 17 is compressed by gland 19.Gasket 17 is
Multiple layer combination gasket.It can be realized quick-replaceable sealing device in the case of not dismantling blowdown pipe 1.
On contact surface between third blowdown pipe 103 and first flange 21 and the 4th blowdown pipe 104 and second flange 22
It is equipped with sealing ring 18, while the joint face and second flange 23 of first flange 21 and upper fixed support plate 15 and lower fixed branch
Sealing ring 18 also is provided on the joint face of fagging 16.
As shown in Fig. 2, the lower end of the 5th blowdown pipe 105 inserts in the circumferential support 14 into 13 upper end of runner and contact surface
Upper setting sealing ring 18.
Blowdown pipe 1 it is whole using dress on merogenesis, on the structure torn open, structure is simple, the second blowdown pipe 102 and third blowdown pipe
103 are connected by the 4th flange 24, and 104 upper end of the 4th blowdown pipe and 105 upper end of the 5th blowdown pipe pass through first flange 21 respectively
It is put together on upper fixed support plate 15 and lower fixed support plate 16 with second flange 22, firm supporting, avoids most latter end upside-down mounting de-
It falls risk and dismounting is difficult.
Embodiment 2: different from embodiment 1, the support plate 20 of 8 upper end of generator lower end axis is equipped with the first manhole 7,
The second manhole 11 is equipped on upper fixed support plate 15 and lower fixed support plate 16, sealing cover is arranged in 11 upper end of the second manhole
23.First manhole 7 and 11 quantity of the second manhole are respectively two, are symmetrical arranged, size is about Φ 400mm.First maintenance
Hole 7 and the second manhole 11 provide convenience as into people channel for Inspection and maintenance.
Turbine shaft water dumping detection hole 10 is set in 12 upper flanges of turbine shaft, under generator lower end axis 8 in end flanges
Leaking area can be quickly judged having a size of Ф 20mm equipped with generator shaft water dumping detection hole 9.
Space where the sealing cover 23 of setting makes third blowdown pipe 103, the 4th blowdown pipe 104, the 5th blowdown pipe 105 is complete
Full isolation, when the failure of the sealing device of 105 lower end of the 5th blowdown pipe and 13 upper end of runner, the sealing cover 23 of 12 lower end of turbine shaft
And second level seal protection is realized in the 4th sealing between blowdown pipe 104 and lower fixed support plate 16, can effectively prevent river
Continuation up diffuses in inside turbine shaft 12；Similarly, the 105 upper end seal failure of the 5th blowdown pipe, 104 upper end of the 4th blowdown pipe are close
Envelope and 15 top cover labyrinth 23 of upper fixed support plate are used as second level seal protection；If the 103 upper end seal failure of third blowdown pipe,
The water then leaked is flowed into generator lower end axis 8 by the first manhole 7, without entering inside generator amature 6, is sent out simultaneously
Motor shaft water dumping detection hole 9 can be detected at the first time water leakage situation.
The above embodiments are only the optimal technical scheme of the utility model, and are not construed as the limit for the utility model
System, the technical solution that the protection scope of the utility model should be recorded with claim, the technical solution recorded including claim
The equivalents of middle technical characteristic are protection scope.Equivalent replacement i.e. within this range is improved, also in the utility model
Protection scope within.
Claims (8)
1. a kind of huge Francis hydroturbine generator set main-shaft core blowdown pipe structure, the blowdown pipe (1) including subsection setup, institute
It states blowdown pipe (1) and aeration valve (2), float trap (3) and Hand-operated butterfly valve (5) is successively installed from top to bottom, it is characterised in that: the benefit
Tracheae (1) include the first blowdown pipe (101), the second blowdown pipe (102), third blowdown pipe (103), the 4th blowdown pipe (104) and
5th blowdown pipe (105), the first blowdown pipe (101) lower end are connect with the second blowdown pipe (102) upper end by third flange (23),
Third flange (23) is fixed with generator upper shaft (4) upper end, on the second blowdown pipe (102) lower end and third blowdown pipe (103)
End is connected by the 4th flange (24), and the 4th blowdown pipe (104) upper end and the 5th blowdown pipe (105) upper end pass through the first method respectively
Blue (21) and second flange (22) are connect with upper fixed support plate (15) and lower fixed support plate (16), upper fixed support plate (15)
It is fixed in turbine shaft (12) with lower fixed support plate (16), the lower end of third blowdown pipe (103) is inserted into first flange
(21) connecting pin, the lower end of the 4th blowdown pipe (104) insert the connecting pin into second flange (22), third blowdown pipe (103)
Sealing ring is equipped on contact surface between first flange (21) and the 4th blowdown pipe (104) and second flange (22)
(18), the lower end of the 5th blowdown pipe (105) inserts in the circumferential support 14 of runner (13) upper end and is arranged on contact surface close
Seal (18).
2. a kind of huge Francis hydroturbine generator set main-shaft core blowdown pipe structure according to claim 1, feature
Be: the contact surface upper end of the first flange (21) and third blowdown pipe (103) is equipped with the first seal groove (2101), the second method
Blue (22) and the contact surface upper end of the 4th blowdown pipe (104) are equipped with the second seal groove (2201), the first seal groove (2101) and the
It is equipped with gasket (17) in two seal grooves (2201), the upper end of gasket (17) is compressed by gland (19).
3. a kind of huge Francis hydroturbine generator set main-shaft core blowdown pipe structure according to claim 2, feature
Be: the gasket (17) is multiple layer combination gasket.
4. a kind of huge Francis hydroturbine generator set main-shaft core blowdown pipe structure according to claim 1, feature
Be: generator lower end axis (8) upper end is equipped with the annular backup pad (20) cooperated with the 4th flange (24), annular backup pad
(20) circumferential support is provided for the 4th flange (24).
5. a kind of huge Francis hydroturbine generator set main-shaft core blowdown pipe structure according to claim 1, feature
Be: the support plate (20) is equipped with the first manhole (7), on upper fixed support plate (15) and lower fixed support plate (16)
Equipped with the second manhole (11), sealing cover (23) are arranged in the second manhole (11) upper end.
6. a kind of huge Francis hydroturbine generator set main-shaft core blowdown pipe structure according to claim 1, feature
It is: turbine shaft water dumping detection hole (10) is set in turbine shaft (12) upper flanges, end flanges under generator lower end axis (8)
It is equipped with generator shaft water dumping detection hole (9).
7. a kind of huge Francis hydroturbine generator set main-shaft core blowdown pipe structure according to claim 1, feature
It is: is equipped with sealing ring (18) on the joint face of the third flange (23) and the 4th flange (24).
8. a kind of huge Francis hydroturbine generator set main-shaft core blowdown pipe structure according to claim 1, feature
It is: the joint face and second flange (23) and lower fixed support plate of the first flange (21) and upper fixed support plate (15)
(16) sealing ring (18) are equipped on joint face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721757198.3U CN208587250U (en) | 2017-12-15 | 2017-12-15 | A kind of huge Francis hydroturbine generator set main-shaft core blowdown pipe structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721757198.3U CN208587250U (en) | 2017-12-15 | 2017-12-15 | A kind of huge Francis hydroturbine generator set main-shaft core blowdown pipe structure |
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| Publication Number | Publication Date |
|---|---|
| CN208587250U true CN208587250U (en) | 2019-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721757198.3U Active CN208587250U (en) | 2017-12-15 | 2017-12-15 | A kind of huge Francis hydroturbine generator set main-shaft core blowdown pipe structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439728A (en) * | 2019-08-07 | 2019-11-12 | 中国水利水电科学研究院 | A method of eliminating the arciform convolution self-excited vibration of mixed-flow wheel generator shaft |
| 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 |
-
2017
- 2017-12-15 CN CN201721757198.3U patent/CN208587250U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439728A (en) * | 2019-08-07 | 2019-11-12 | 中国水利水电科学研究院 | A method of eliminating the arciform convolution self-excited vibration of mixed-flow wheel generator shaft |
| 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 |
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