CN103775273B - A kind of RPT type hydraulic turbine main shaft sealing device - Google Patents
A kind of RPT type hydraulic turbine main shaft sealing device Download PDFInfo
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- CN103775273B CN103775273B CN201410071576.7A CN201410071576A CN103775273B CN 103775273 B CN103775273 B CN 103775273B CN 201410071576 A CN201410071576 A CN 201410071576A CN 103775273 B CN103775273 B CN 103775273B
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- main shaft
- end cap
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- turbine main
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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 invention discloses a kind of RPT type hydraulic turbine main shaft sealing device, comprise adjusting cylinders, end cap, inner ring, O-ring seals, seal ring and swivel becket, end cap upper end is provided with adjusting cylinders, and the telescopic end of adjusting cylinders is positioned at the lower end of end cap, end cap is set in inner ring upper end, and inner ring lower end is connected with the telescopic end of adjusting cylinders; Inner ring upper-end surface is provided with water inlet, and inner ring lower end surface is provided with annular groove, is provided with seal ring in the annular groove in inner ring, and the thickness of seal ring is greater than the degree of depth of annular groove, and seal ring circumferencial direction is also provided with through hole; The lower end of seal ring is also provided with swivel becket, and the lower end surface of seal ring contacts with the upper-end surface of swivel becket, and end cap, inner ring, O-ring seals, seal ring, swivel becket and hydraulic turbine main shaft end cap form airtight Seal cage; RPT type hydraulic turbine main shaft sealing device designed by the present invention is to prevent press water from seepage machine hole between hydraulic turbine main shaft and hydraulic turbine main shaft end cap, and flood water pilot bearing, impact runs.
Description
Technical field
The present invention relates to a kind of seal arrangement, particularly relate to a kind of RPT type hydraulic turbine main shaft sealing device.
Background technique
Water turbine is the dynamic power machine of rotating mechanical energy the transformation of energy of current, and it belongs to the turbomachinery in fluid machinery.Modern water turbine then great majority is arranged in water power plant, is used for driving electrical power generators.In water power plant, the water in upper pond guides water turbine into through aqueduct, and promote rotary wheel of water turbine and rotate, drive electrical generators generates electricity.The water finishing merit then by tail water pipeline discharged to downstream.Head is higher, flow is larger, and the output power of water turbine is also larger.Hydraulic turbine main shaft sealing device is important parts in water turbine, the hydraulic turbine main shaft sealing device of prior art adopts nylon end face seal, because spring pressure is uneven, corrosion is disrumpent feelings and the resistance of rubber packing between pallet and seal rack, add silt blocking and parts corrosion, and use the requirement of packing to hydraulic turbine main shaft high, be easy to, because of vibrations or the tripping problems of hydraulic turbine main shaft self, cause the sealing destroying whole seal arrangement, the problem such as accidents caused.
Summary of the invention
For the technical problem of above-mentioned existence, the object of the invention is: the RPT type hydraulic turbine main shaft sealing device proposing a kind of good sealing effect, to prevent press water from seepage machine hole between hydraulic turbine main shaft and hydraulic turbine main shaft end cap, flood water pilot bearing, destroy the work of water pilot bearing, affect the normal operation of unit.
In order to solve the problems of the technologies described above, the invention provides a kind of RPT type hydraulic turbine main shaft sealing device, comprise adjusting cylinders, end cap, inner ring, O-ring seals, seal ring and swivel becket, end cap upper end is provided with adjusting cylinders, and the telescopic end of adjusting cylinders is positioned at the lower end of end cap, end cap is set in inner ring upper end, and inner ring lower end is connected with the telescopic end of adjusting cylinders; Also O-ring seals is provided with between inner ring upper end cylindrical and end cap endoporus;
Inner ring upper-end surface is provided with water inlet, and inner ring lower end surface is provided with annular groove, and water inlet is communicated with circular groove, seal ring is provided with in annular groove in inner ring, and the thickness of seal ring is greater than the degree of depth of annular groove, seal ring circumferencial direction is also provided with through hole, and through hole is all communicated with annular groove;
The lower end of seal ring is also provided with swivel becket, and the lower end surface of seal ring contacts with the upper-end surface of swivel becket, swivel becket is connected with hydraulic turbine main shaft by fastening piece, the lower end of end cap is connected with hydraulic turbine main shaft end cap by fastening piece, end cap, inner ring, O-ring seals, seal ring, forms airtight Seal cage between swivel becket and hydraulic turbine main shaft end cap.
In the technical program, adopt adjusting cylinders, supply gas pressure adopts same pressure source, ensures each cylinder place uniform force, pressure regulation device can be placed on outdoor simultaneously, easy to adjust; Adopt outlet hole structure water flowing, and seal ring still can be in free state and not affect by spindle swing on swivel becket after being worn; Inner ring can adjust with tail water change automatically to swivel becket impacting force, reduce the impact of tail water on sealing, ensure the reliable and stable adjustment in use cylinder of unit operation, avoid and use the problems such as spring pressure is uneven, corrosion is disrumpent feelings, and the present invention is without the need to using packing, alleviates the resistance of main shaft, avoiding spindle abrasion, sealability is better, more reliably.
Further restriction technological scheme of the present invention is:
Aforementioned RPT type hydraulic turbine main shaft sealing device, is also provided with support ring between end cap and hydraulic turbine main shaft end cap, and support ring and end cap, support ring and hydraulic turbine main shaft end cap, swivel becket and hydraulic turbine main shaft surface of contact are equipped with O-ring seals.
Aforementioned RPT type hydraulic turbine main shaft sealing device, the quantity of adjusting cylinders is at least one, and the uniform setting of described adjusting cylinders.
The present invention compared with prior art tool has the following advantages:
Technological scheme of the present invention adopts adjusting cylinders, and supply gas pressure adopts same pressure source, ensures each cylinder place uniform force, pressure regulation device can be placed on outdoor simultaneously, easy to adjust; Adopt outlet hole structure water flowing, and seal ring still can be in free state and not affect by spindle swing on swivel becket after being worn; Inner ring can adjust with tail water change automatically to swivel becket impacting force, reduces the impact of tail water on sealing, ensures that unit operation is reliable and stable.
Technological scheme of the present invention can prevent press water from seepage machine hole between hydraulic turbine main shaft and hydraulic turbine main shaft end cap, flood water pilot bearing, destroy the work of water pilot bearing, affect the normal operation of unit, avoid and use the problems such as spring pressure is uneven, corrosion is disrumpent feelings, and the present invention is without the need to using packing, alleviates the resistance of main shaft, avoid because of vibrations or the beating of hydraulic turbine main shaft self, cause the sealing destroying whole device.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Wherein: 1-adjusting cylinders, 2-end cap, 3-inner ring, 4-O shape seal ring, 5-seal ring, 6-swivel becket, 7-Seal cage, 8-support ring, 301-water inlet, 302-annular groove, 501-through hole.
Embodiment
Below in conjunction with accompanying drawing 1, the present invention is described in further detail:
embodiment 1
As shown in Figure 1, a kind of RPT type hydraulic turbine main shaft sealing device that the present embodiment provides, comprise adjusting cylinders 1, end cap 2, inner ring 3, O-ring seals 4, seal ring 5 and swivel becket 6, end cap 2 upper end is provided with an adjusting cylinders 1, and the telescopic end of adjusting cylinders 1 is positioned at the lower end of end cap 2, end cap 2 is set in inner ring 3 upper end, and inner ring 3 lower end is connected with the telescopic end of adjusting cylinders 1; O-ring seals 4 is also provided with between inner ring 3 upper end cylindrical and end cap 2 endoporus;
Inner ring 3 upper-end surface is provided with two water inlets 301, inner ring 3 lower end surface is provided with annular groove 302, water inlet 301 is communicated with circular groove 302, seal ring 5 is provided with in annular groove 302 in inner ring 3, and the thickness position 30mm of seal ring 5, the degree of depth of annular groove 302 is 15mm, and seal ring 5 circumferencial direction is also provided with ten uniform through holes 501, and through hole 501 is all communicated with annular groove 302; Inner ring 3 is set on hydraulic turbine main shaft, and the endoporus of inner ring 3 does not contact with hydraulic turbine main shaft;
The lower end of seal ring 5 is also provided with swivel becket 6, and the lower end surface of seal ring 5 contacts with the upper-end surface of swivel becket 6, swivel becket 6 is connected with hydraulic turbine main shaft by screw, the lower end of end cap 2 is connected with hydraulic turbine main shaft end cap by screw, end cap 2, inner ring 3, O-ring seals 4, seal ring 5, forms airtight Seal cage 7 between swivel becket 6 and hydraulic turbine main shaft end cap.
Also be provided with support ring 8 between end cap 2 and hydraulic turbine main shaft end cap, and support ring 8 is equipped with an O-ring seals 4 with hydraulic turbine main shaft end cap, swivel becket 6 with hydraulic turbine main shaft surface of contact with end cap 2, support ring 8.
The present embodiment working procedure: when water turbine operationally, hydraulic turbine main shaft High Rotation Speed, swivel becket 6 rotates together with hydraulic turbine main shaft, static seal ring 5 lower end surface contacts with the upper-end surface of swivel becket 6 and seals, pass through external means, the current with pressure are injected to the water inlet of two in inner ring 3 301, and the through hole 501 of current successively on annular groove 302 and seal ring 5, then contact with swivel becket 6 upper-end surface, reach the effect of sealing, and the adjusting cylinders 1 that outside is provided with by end cap 2 upper end axially applies certain pressure to inner ring 3 uniformly, ensure that swivel becket 6 and seal ring 5 surface of contact fit tightly, force end cap 2, inner ring 3, O-ring seals 4, seal ring 5, airtight Seal cage 7 is formed between swivel becket 6 and hydraulic turbine main shaft end cap, device is made to reach the effect of sealing.
Like this, the present embodiment can prevent press water from seepage machine hole between hydraulic turbine main shaft and hydraulic turbine main shaft end cap, flood water pilot bearing, destroy the work of water pilot bearing, affect the normal operation of unit, avoid and use the problems such as spring pressure is uneven, corrosion is disrumpent feelings, and the present embodiment is without the need to using packing, alleviate the resistance of main shaft, avoid because of vibrations or the beating of hydraulic turbine main shaft self, cause the sealing destroying whole device.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technological scheme basis is done, all falls within scope.
Claims (3)
1. a RPT type hydraulic turbine main shaft sealing device, comprise adjusting cylinders (1), end cap (2), inner ring (3), O-ring seals (4), seal ring (5) and swivel becket (6), it is characterized in that: described end cap (2) upper end is provided with adjusting cylinders (1), and the telescopic end of described adjusting cylinders (1) is positioned at the lower end of end cap (2), described end cap (2) is set in inner ring (3) upper end, and described inner ring (3) lower end is connected with the telescopic end of adjusting cylinders (1); O-ring seals (4) is also provided with between described inner ring (3) upper end cylindrical and end cap (2) endoporus;
Described inner ring (3) upper-end surface is provided with water inlet (301), inner ring (3) lower end surface is provided with annular groove (302), described water inlet (301) is communicated with annular groove (302), seal ring (5) is provided with in annular groove (302) in described inner ring (3), and the thickness of described seal ring (5) is greater than the degree of depth of annular groove (302), described seal ring (5) circumferencial direction is also provided with through hole (501), and described through hole (501) is all communicated with annular groove (302);
The lower end of described seal ring (5) is also provided with swivel becket (6), and the lower end surface of described seal ring (5) contacts with the upper-end surface of swivel becket (6), described swivel becket (6) is connected with hydraulic turbine main shaft by fastening piece, the lower end of described end cap (2) is connected with hydraulic turbine main shaft end cap by fastening piece, described end cap (2), inner ring (3), O-ring seals (4), seal ring (5), forms airtight Seal cage (7) between swivel becket (6) and hydraulic turbine main shaft end cap.
2. RPT type hydraulic turbine main shaft sealing device according to claim 1, it is characterized in that: between described end cap (2) and hydraulic turbine main shaft end cap, be also provided with support ring (8), and described support ring (8) is equipped with O-ring seals (4) with hydraulic turbine main shaft end cap, swivel becket (6) with hydraulic turbine main shaft surface of contact with end cap (2), support ring (8).
3. RPT type hydraulic turbine main shaft sealing device according to claim 1, is characterized in that: the quantity of described adjusting cylinders (1) is at least one, and described adjusting cylinders (1) uniform setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410071576.7A CN103775273B (en) | 2014-02-28 | 2014-02-28 | A kind of RPT type hydraulic turbine main shaft sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410071576.7A CN103775273B (en) | 2014-02-28 | 2014-02-28 | A kind of RPT type hydraulic turbine main shaft sealing device |
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| Publication Number | Publication Date |
|---|---|
| CN103775273A CN103775273A (en) | 2014-05-07 |
| CN103775273B true CN103775273B (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410071576.7A Active CN103775273B (en) | 2014-02-28 | 2014-02-28 | A kind of RPT type hydraulic turbine main shaft sealing device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108979933A (en) * | 2018-07-13 | 2018-12-11 | 广州百份百节能科技有限公司 | The permanent magnetism water oil hanging sealing device of hydraulic turbine coefficient of friction is reduced completely |
| CN112324603B (en) * | 2020-11-17 | 2022-02-08 | 国家电网有限公司 | Water turbine main shaft sealing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2804440Y (en) * | 2005-07-02 | 2006-08-09 | 自贡机械密封件有限责任公司 | Mechanical sealing gland without droping ring |
| CN203394735U (en) * | 2013-07-23 | 2014-01-15 | 天津市联强机械密封技术有限公司 | Mechanical seal structure special for bidirectional balanced type chemical pump |
| CN203453469U (en) * | 2013-07-09 | 2014-02-26 | 重庆大唐国际武隆水电开发有限公司 | A water turbine main shaft sealing structure |
| CN203730202U (en) * | 2014-02-28 | 2014-07-23 | 南京贝奇尔机械有限公司 | RPT (reversible pump turbine) spindle sealing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08177705A (en) * | 1994-12-27 | 1996-07-12 | Toshiba Eng Co Ltd | Main shaft sealing water device of vertical shaft hydraulic turbine |
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2014
- 2014-02-28 CN CN201410071576.7A patent/CN103775273B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2804440Y (en) * | 2005-07-02 | 2006-08-09 | 自贡机械密封件有限责任公司 | Mechanical sealing gland without droping ring |
| CN203453469U (en) * | 2013-07-09 | 2014-02-26 | 重庆大唐国际武隆水电开发有限公司 | A water turbine main shaft sealing structure |
| CN203394735U (en) * | 2013-07-23 | 2014-01-15 | 天津市联强机械密封技术有限公司 | Mechanical seal structure special for bidirectional balanced type chemical pump |
| CN203730202U (en) * | 2014-02-28 | 2014-07-23 | 南京贝奇尔机械有限公司 | RPT (reversible pump turbine) spindle sealing device |
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| CN103775273A (en) | 2014-05-07 |
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