CN208457209U - A kind of Turbo-generator Set hydrogen seal device - Google Patents
A kind of Turbo-generator Set hydrogen seal device Download PDFInfo
- Publication number
- CN208457209U CN208457209U CN201821202976.7U CN201821202976U CN208457209U CN 208457209 U CN208457209 U CN 208457209U CN 201821202976 U CN201821202976 U CN 201821202976U CN 208457209 U CN208457209 U CN 208457209U
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- Prior art keywords
- sealing
- sealing ring
- ring
- alternator shaft
- seal
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- Expired - Fee Related
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Abstract
The utility model relates to a kind of Turbo-generator Set hydrogen seal devices, technical solution is, the resistance discs being fixed together with alternator shaft are set on the alternator shaft of seal receptacle opening, resistance discs protrude into the inner cavity of seal receptacle from the opening of seal receptacle, the first sealing ring and the second sealing ring axially to horizontally slip along alternator shaft is respectively arranged in the seal receptacle of resistance discs two sides, the first uniformly distributed helicla flute of multiple tracks is provided on the periphery of resistance discs and the first sealing ring right opposite, the second uniformly distributed helicla flute of multiple tracks is provided on the periphery of resistance discs and the second sealing ring right opposite, compared with prior art, it is needed when the utility model hydrogen gas leakage by the two-stage screw slot type dynamic pressure oil film sealing between sealing ring and resistance discs and the two-stage groove type dynamic pressure oil film sealing between sealing floating ring and alternator shaft, leakage rate is small；The seal clearance very little formed between sealing ring and resistance discs by helicla flute dynamic pressure effect, so as to effectively reduce leakage.
Description
Technical field
The utility model relates to the sealing devices between a kind of hydrogen-cooled turbo-alternator both ends sound component, reduce hydrogen
Leakage and therefore harm of the bring to unit safety operation along shaft end, it is close to be mainly used for hydrogen-cooled generator hydrogen
Envelope.
Background technique
With the increase of generating set single-machine capacity, the heat generated in generator operation increases.In order to improve cooling effect
Fruit, Generator Set generally use hydrogen as cooling medium, to substitute water or air.Between having between generator sound component
Gap, hydrogen can be along clearance leakages between the two.Hydrogen belongs to flammable explosive gas, and aerial concentration reaches certain
After degree, it will cause explosion, significant damage will be generated to unit safety operation and human life.Therefore, in unit operation,
Strictly forbid the leakage of hydrogen.
In order to reduce the leakage of hydrogen, is covered in the generator end of hydrogen-cooled generator group both ends of the shaft and be respectively equipped with 1 set
Sealing bearing bush mainly uses circulation type at present.According to the quantity of oil circuit, it is divided into single current, double-current method or three streamings, according to tile fragment
Quantity is divided into monocyclic or dicyclic, and after oil circuit and packing ring combination, sealing bearing bush can be divided into: single stream monocyclic, Dan Liushuan
Ring type, double-current monocyclic etc..Although oil circuit is different with the quantity of sealing ring, the working principle of circulation type sealing bearing bush is identical, this
A kind of floating sealing or floating type sliding bearing are belonged in matter.When unit is run, by hydrogen pressure in slightly above generator
Seal Oil enters in the gap tile fragment and axle journal from tile fragment back across tile fragment, by brought by axle journal high speed rotation
Dynamic pressure effect floats sealing ring, lubricating oil is full of between dynamic and static gaps, so that hydrogen gas leakage channel blockage be played
Sealing effect.
Circulation type sealing bearing bush has following several respects when applying in hydrogen cooled generator group: (1) floating power is inadequate.
After generator hydrogen pressure increases, the pressure difference between hydrogen side and empty side becomes larger, and after Hydrogen Vapor Pressure acts on sealing ring end face, will form
One axial thrust, pushes sealing ring to side, leads to tile fragment bite, can not achieve between tile fragment and axle journal change in location with
It is dynamic；(2) after sealing bearing bush bite, pad temperature raising is not only resulted in, and can therefore generate unstable vibration；(3) it seals
Watt gap is unable to very little.The too small easy watt temperature that causes in sealing bearing bush gap increases, after sealing bearing bush gap increases, not only hydrogen gas leakage amount
It will increase, seal oil flow also will increase, and Seal Oil, which is possible to flow backward, to be entered in engine block, and generator insulating is caused to decline
Etc. other failures.Therefore, the research efficient sealed method of hydrogen-cooled generating set just seems critically important.
Utility model content
For above situation, for the defect for overcoming the prior art, the purpose of the utility model is just to provide a kind of steamer hair
Motor group hydrogen seal device, can effectively reduce hydrogen along shaft end leakage and therefore and bring is to unit safety operation
Harm.
The technical solution that the utility model solves is:
A kind of Turbo-generator Set hydrogen seal device, including alternator shaft and the hair being arranged on the outside of alternator shaft
Electric motor end cap, the seal receptacle being fixed together with generator's cover is provided on the outside of alternator shaft, and seal receptacle is opening court
To the inside opening hollow structure of alternator shaft, it is set on the alternator shaft of seal receptacle opening solid with alternator shaft
It is scheduled on resistance discs together, resistance discs protrude into the inner cavity of seal receptacle from the opening of seal receptacle, in the seal receptacle of resistance discs two sides
It is respectively arranged with the first sealing ring and the second sealing ring axially to horizontally slip along alternator shaft, resistance discs and the first sealing ring
It is provided with the first uniformly distributed helicla flute of multiple tracks on the periphery of right opposite, is provided in resistance discs and the periphery of the second sealing ring right opposite more
The second uniformly distributed helicla flute of road is provided with the first O-ring seal, the second sealing ring and sealing between the first sealing ring and seal receptacle
The second O-ring seal is provided between seat, and the inside of the first sealing ring and the second sealing ring is protruded into towards alternator shaft close
It seals seat opening and is in alternate setting with alternator shaft, protrude on the medial surface of the first sealing ring of seal receptacle opening and be provided with
First floating ring sliding groove of circular ring shape protrudes on the medial surface of the second sealing ring of seal receptacle opening and is provided with the second of circular ring shape
Floating ring sliding groove is provided with the first sealing floating ring in the first floating ring sliding groove, is provided with the second sealing in the second floating ring sliding groove
The first uniformly distributed groove of multiple tracks is provided on the medial surface of the side of floating ring, the first sealing floating ring and alternator shaft face, second
Be provided with the second uniformly distributed groove of multiple tracks on the medial surface of the side of sealing floating ring and alternator shaft face, seal receptacle inner sidewall with
It is provided with the first spring between first sealing ring, second spring is provided between seal receptacle inner sidewall and the second sealing ring, generates electricity
When machine shaft is static, under the elastic force of the first spring and second spring, the right opposite of the first sealing ring and resistance discs is fitted in
Together, the second sealing ring and the right opposite of resistance discs fit together, and the close of inside and outside perforation is provided on the lateral wall of seal receptacle
Oil sealing entrance.
Compared with prior art, it has the advantages that
(1) needed when hydrogen gas leakage by between sealing ring and resistance discs two-stage screw slot type dynamic pressure oil film sealing and
The two-stage groove type dynamic pressure oil film sealing between floating ring and alternator shaft is sealed, leakage rate is small；
(2) under generator working condition, between the sealing formed between sealing ring and resistance discs by helicla flute dynamic pressure effect
Gap very little, so as to effectively reduce leakage；
(3) primary seal when hydrogen gas leakage is the two-stage screw slot type dynamic pressure oil film sealing between sealing ring and resistance discs,
Sealing floating ring is merely possible to auxiliary seal, and therefore, the width for sealing floating ring can be designed narrow, seals floating ring weight ratio
Relatively light, the groove of sealing floating ring inner surface design increases the buoyancy lift of sealing floating ring, and sealing floating ring two sides pressure difference is smaller, by
The axial force that this is generated is smaller, above-mentioned multinomial factor, and the bite between sealing floating ring and alternator shaft can be effectively reduced
Phenomenon；
(4) it can effectively improve the unstable vibration phenomenon caused because of floating ring type sealing bearing bush bite.
Detailed description of the invention
Fig. 1 is the cross-sectional view of the Turbo-generator Set hydrogen seal device of the utility model；
Fig. 2 is hydrogen gas leakage path profile (semi-cutaway) in the sealing device of the utility model；
Fig. 3 is the left view of the utility model resistance discs；
Fig. 4 is the right view of the utility model resistance discs；
The sectional view of Fig. 5 the utility model sealing floating ring；
Fig. 6 the utility model seals the groove schematic diagram after floating ring expansion.
Specific embodiment
Specific embodiment of the present utility model is described in further detail below in conjunction with attached drawing.
It is provided by Fig. 1-6, a kind of Turbo-generator Set hydrogen seal device of the utility model, including 12 He of alternator shaft
Generator's cover 13 on the outside of alternator shaft is set, and generator's cover 13 is stationary parts, and alternator shaft 12 is rotation
Component, alternator shaft 12 are passed through out of generator's cover 13 and can be rotated around its axis direction, the two there are certain interval,
Guarantee not contact with generator's cover 13 when alternator shaft 12 rotates, the outside of alternator shaft 12 is provided with and generator end
The seal receptacle 2 that lid 13 is fixed together, seal receptacle 2 are inside opening hollow structure of the opening towards alternator shaft, seal receptacle 2
It is set with the resistance discs 1 being fixed together with alternator shaft on the alternator shaft 12 of opening, resistance discs 1 are from seal receptacle 2
Opening protrude into the inner cavity of seal receptacle, be respectively arranged in the seal receptacle of 1 two sides of resistance discs along the axial left and right of alternator shaft
The first sealing ring 3 and the second sealing ring 4 of sliding are provided with multiple tracks on the periphery of 3 right opposite of resistance discs 1 and the first sealing ring and are evenly distributed with
The first helicla flute 16, be provided with the second uniformly distributed helicla flute 17 of multiple tracks on the periphery of 4 right opposite of resistance discs 1 and the second sealing ring,
It is provided with the first O-ring seal 7 between first sealing ring 3 and seal receptacle 2, is provided between the second sealing ring 4 and seal receptacle 2
2 opening of seal receptacle is protruded into towards alternator shaft in the inside of two O-ring seals 8, the first sealing ring 3 and the second sealing ring 4
And it protrudes on the medial surface of the first sealing ring 3 of 2 opening of seal receptacle in alternate setting with alternator shaft 12 and is provided with circular ring shape
The first floating ring sliding groove 14, protrude into and be provided with the second floating of circular ring shape on the medial surface of the second sealing ring 4 of 2 opening of seal receptacle
Ring sliding groove 15 is provided with the first sealing floating ring 9 in first floating ring sliding groove 14, is provided with second in the second floating ring sliding groove 15
Seal floating ring 10, first sealing floating ring 9 and 12 face of alternator shaft side medial surface on be provided with multiple tracks it is uniformly distributed first
The second uniformly distributed groove of multiple tracks is provided on the medial surface of the side of groove 9a, the second sealing floating ring 9 and 12 face of alternator shaft
10a is provided with the first spring 5,2 inner sidewall of seal receptacle and the second sealing ring 4 between 2 inner sidewall of seal receptacle and the first sealing ring 3
Between be provided with second spring 6, when alternator shaft is static, under the elastic force of the first spring and second spring, first sealing
Ring 3 and the right opposite of resistance discs 1 fit together, and the second sealing ring 4 and the right opposite of resistance discs 1 fit together, seal receptacle 2
Lateral wall on be provided with the inside and outside sealing oil-in 11 penetrated through.
In order to guarantee using effect, the depth of first helicla flute 16 and the second helicla flute 17 is 5 μm -10 μm；The
One helicla flute 16 and the second helicla flute 17 are penetrated through with the outer periphery of resistance discs, quickly enter Seal Oil in helicla flute.
The depth of the first groove 9a and the second groove 10a are 5 μm -10 μm；First groove 9a and the second groove 10a are equal
For the rectangular channel of strip, it is inclined to set on the medial surface of corresponding sealing floating ring.
The first sealing ring 3 and right opposite of resistance discs 1 is parallel to each other and the axis of the right opposite and alternator shaft 12
Line is vertical, and the right opposite of the second sealing ring 4 and resistance discs 1 is parallel to each other and the axis of the right opposite and alternator shaft 12 hangs down
Directly.
The generator's cover 13, seal receptacle 2, resistance discs 1, the first sealing ring 3, the second sealing ring 4 section be circle
Annular, centre bore are passed through for alternator shaft.
The telescopic direction of first spring 5 is axial parallel with alternator shaft 12.So as in resilient force
Under so that the first sealing ring 3 is horizontally slipped, the first sealing ring 3 can be by being placed on the ipsilateral bottom plate of seal receptacle 2 in end
First lug boss 3a is supported the first lug boss of sliding and is supported on the bottom of seal receptacle, and the first spring is located at the first lug boss
Top, the first O-ring seal 7 may be provided between 2 bottom plate of the first lug boss and seal receptacle, and the first O-ring seal can also be with
As the first sealing ring is axially moveable together, prevent hydrogen from leaking from faying face；It in actual use, can also be in seal receptacle
It is interior that individual track is set and slide bar cooperation sliding corresponding with track is set on the first sealing ring；
The telescopic direction of the second spring 6 is axial parallel with alternator shaft 12.So as in resilient force
Under so that the second sealing ring 4 is horizontally slipped, the second sealing ring 4 can be by being placed on the ipsilateral bottom plate of seal receptacle 2 in end
Second lug boss 4a is supported the second lug boss of sliding and is supported on the bottom of seal receptacle, and second spring is located at the second lug boss
Top, the second O-ring seal 8 may be provided between 2 bottom plate of the second lug boss and seal receptacle；Second O-ring seal can also be with
As the second sealing ring is axially moveable together, prevent hydrogen from leaking from faying face；It in actual use, can also be in seal receptacle
It is interior that individual track is set and slide bar cooperation sliding corresponding with track is set on the second sealing ring.
When the utility model is used, pressure is introduced from the sealing oil-in 11 of seal receptacle by outside be higher than generator hydrogen gas side
In the Seal Oil to seal receptacle of hydrogen pressure；Under generator working condition, resistance discs are with alternator shaft high speed rotation, resistance discs two
Dynamic pressure effect is generated at the helicla flute of side and the sealing ring mating surface (right opposite) of respective side, axial opening force is formed, by two
Side seal ring and resistance discs separate, i.e. the first sealing ring and the second sealing ring are all along alternator shaft axis direction towards far from resistance
Disk direction is mobile, and gap is formed between both sides sealing ring and resistance discs, gap very little (within 10 μm) between the two, Seal Oil
Enter gap from helicla flute and fill gap, the gap between both sides sealing ring and resistance discs is made to be in Condition of Thin Film Lubrication,
Sealing oil film is formed in gap；Alternator shaft high speed rotation simultaneously, between the groove and alternator shaft of sealing floating ring medial surface
Generate dynamic pressure effect, will sealing floating ring float get up, Seal Oil from the gap between sealing ring, resistance discs enter sealing floating ring,
Gap between alternator shaft forms sealing oil film, and sealing floating ring and alternator shaft are separated；By sealing ring and resistance
Between disk two-stage screw slot type dynamic pressure oil film sealing (between the first sealing ring of resistance discs and two sides, the second sealing ring) and
Seal between floating ring and alternator shaft the sealing of two-stage groove type dynamic pressure oil film (the first sealing floating ring, the second sealing floating ring with
Between alternator shaft), realize the efficient sealed of generator hydrogen gas leakage.Compared with prior art, the utility model structure is new
Clever unique, advantages of simple is easy to produce, easy to operate, and helicla flute is arranged in resistance discs two sides, carries out Seal Oil quickly, fast
Speed generates dynamic pressure effect, and when hydrogen gas leakage needs by the two-stage screw slot type dynamic pressure oil film sealing between sealing ring and resistance discs
And the two-stage groove type dynamic pressure oil film sealing between sealing floating ring and alternator shaft, leakage rate are small；Generator working condition
Under, the seal clearance very little formed between sealing ring and resistance discs by helicla flute dynamic pressure effect, so as to effectively reduce
Leakage；Primary seal when hydrogen gas leakage is the two-stage screw slot type dynamic pressure oil film sealing between sealing ring and resistance discs, and sealing is floating
Ring is merely possible to auxiliary seal, and therefore, the width for sealing floating ring can be designed narrow, and sealing floating ring weight is lighter,
The groove for sealing the design of floating ring inner surface increases the buoyancy lift of sealing floating ring, and sealing floating ring two sides pressure difference is smaller, thus generates
Axial force it is smaller, above-mentioned multinomial factor, can be effectively reduced sealing floating ring and alternator shaft between bite phenomenon；It can
To effectively improve the unstable vibration phenomenon caused because of floating ring type sealing bearing bush bite；Easy to use, effect is good, steamer
Innovation on generating set hydrogen seal device, there is good social and economic benefit.
Claims (6)
1. a kind of Turbo-generator Set hydrogen seal device including alternator shaft (12) and is arranged on the outside of alternator shaft
Generator's cover (13), which is characterized in that be provided on the outside of alternator shaft (12) and be fixed on one with generator's cover (13)
The seal receptacle (2) risen, seal receptacle (2) are inside opening hollow structure of the opening towards alternator shaft, seal receptacle (2) opening
Alternator shaft (12) on be set with the resistance discs (1) being fixed together with alternator shaft, resistance discs (1) are from seal receptacle
(2) opening protrudes into the inner cavity of seal receptacle, is respectively arranged in the seal receptacle of resistance discs (1) two sides along alternator shaft axial direction
On the periphery of the first sealing ring (3) and the second sealing ring (4) to horizontally slip, resistance discs (1) and the first sealing ring (3) right opposite
It is provided with uniformly distributed the first helicla flute (16) of multiple tracks, it is equal to be provided with multiple tracks in resistance discs (1) and the periphery of the second sealing ring (4) right opposite
The second helicla flute (17) of cloth, is provided with the first O-ring seal (7), second is close between the first sealing ring (3) and seal receptacle (2)
Be provided between seal ring (4) and seal receptacle (2) the second O-ring seal (8), the first sealing ring (3) and the second sealing ring (4) it is interior
Seal receptacle (2) opening is protruded into and with alternator shaft (12) in alternate setting towards alternator shaft in side, protrudes into seal receptacle
(2) it is provided with the first floating ring sliding groove (14) of circular ring shape on the medial surface of the first sealing ring (3) of opening, protrudes into seal receptacle
(2) the second floating ring sliding groove (15) of circular ring shape, the sliding of the first floating ring are provided on the medial surface of the second sealing ring (4) of opening
It is provided with the first sealing floating ring (9) in slot (14), is provided with the second sealing floating ring (10) in the second floating ring sliding groove (15), first
It is provided with uniformly distributed the first groove (9a) of multiple tracks on the medial surface of the side of sealing floating ring (9) and alternator shaft (12) face, the
The second uniformly distributed groove of multiple tracks is provided on the medial surface of the side of two sealings floating ring (10) and alternator shaft (12) face
(10a) is provided with the first spring (5) between seal receptacle (2) inner sidewall and the first sealing ring (3), seal receptacle (2) inner sidewall and
Second spring (6) are provided between two sealing rings (4), when alternator shaft is static, in the elasticity of the first spring and second spring
Under power, the first sealing ring (3) and the right opposite of resistance discs (1) fit together, and the second sealing ring (4) and resistance discs (1) are just
Opposite fits together, and the inside and outside sealing oil-in (11) penetrated through is provided on the lateral wall of seal receptacle (2).
2. Turbo-generator Set hydrogen seal device according to claim 1, which is characterized in that first helicla flute
(16) and the depth of the second helicla flute (17) is 5 μm -10 μm.
3. Turbo-generator Set hydrogen seal device according to claim 1, which is characterized in that first groove (9a)
Depth with the second groove (10a) is 5 μm -10 μm.
4. Turbo-generator Set hydrogen seal device according to claim 1, which is characterized in that first sealing ring
(3) it is parallel to each other with the right opposite of resistance discs (1) and the right opposite is vertical with the axis of alternator shaft (12), the second sealing ring
(4) it is parallel to each other with the right opposite of resistance discs (1) and the right opposite is vertical with the axis of alternator shaft (12).
5. Turbo-generator Set hydrogen seal device according to claim 1, which is characterized in that first spring (5)
Telescopic direction and alternator shaft (12) it is axial parallel.
6. Turbo-generator Set hydrogen seal device according to claim 1, which is characterized in that the second spring (6)
Telescopic direction and alternator shaft (12) it is axial parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821202976.7U CN208457209U (en) | 2018-07-27 | 2018-07-27 | A kind of Turbo-generator Set hydrogen seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821202976.7U CN208457209U (en) | 2018-07-27 | 2018-07-27 | A kind of Turbo-generator Set hydrogen seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208457209U true CN208457209U (en) | 2019-02-01 |
Family
ID=65180359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821202976.7U Expired - Fee Related CN208457209U (en) | 2018-07-27 | 2018-07-27 | A kind of Turbo-generator Set hydrogen seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208457209U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679231A (en) * | 2018-07-27 | 2018-10-19 | 中国大唐集团科学技术研究院有限公司华中分公司 | Turbo-generator Set hydrogen seal device and encapsulating method |
| CN110296218A (en) * | 2019-07-02 | 2019-10-01 | 清华大学 | A kind of screen sealing structure that screen stacking clearance self-regulating is whole |
-
2018
- 2018-07-27 CN CN201821202976.7U patent/CN208457209U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679231A (en) * | 2018-07-27 | 2018-10-19 | 中国大唐集团科学技术研究院有限公司华中分公司 | Turbo-generator Set hydrogen seal device and encapsulating method |
| CN110296218A (en) * | 2019-07-02 | 2019-10-01 | 清华大学 | A kind of screen sealing structure that screen stacking clearance self-regulating is whole |
| CN110296218B (en) * | 2019-07-02 | 2020-09-29 | 清华大学 | Grid plate sealing structure with self-adjusting grid plate stacking gaps |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190201 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |