CN106787375B - Oil seal structure is taken turns to turbo generator - Google Patents
Oil seal structure is taken turns to turbo generator Download PDFInfo
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- CN106787375B CN106787375B CN201611154711.XA CN201611154711A CN106787375B CN 106787375 B CN106787375 B CN 106787375B CN 201611154711 A CN201611154711 A CN 201611154711A CN 106787375 B CN106787375 B CN 106787375B
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- sealing
- oil duct
- transition ring
- branch oil
- turbo generator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gasket Seals (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention provides a 'back' shaped oil sealing structure of a turbo generator, which comprises a transition ring, an end cover and a sealing seat, wherein the transition ring forms a sealing structure with the end cover and the sealing seat through sealing plates, a first oil passage and a second oil passage which are mutually communicated are arranged on the transition ring, the first oil passage and the second oil passage respectively penetrate through the sealing plates, a mounting groove is arranged on the end cover and is embedded with a second sealing strip in the mounting groove, a mounting groove is arranged on the sealing seat and is embedded with a first sealing strip in the mounting groove, sealing oil is filled in the first oil passage and the second oil passage, and the first oil passage, the second oil passage, the sealing plate, the second sealing strip and the first sealing strip jointly form the 'back' shaped oil sealing structure. The invention can greatly reduce the hydrogen supplementing amount when the turbo generator operates, reduce the application cost of the turbo generator, and effectively improve the safe operation reliability of the turbo generator.
Description
Technical Field
The invention relates to the technical field of sealing structure design of turbo generators, in particular to a 'return' -shaped oil sealing structure of a turbo generator.
Background
The main heat exchange component of the turbo generator is a hydrogen cooler (abbreviated as hydrogen cooler, hereinafter the same applies), wherein the cooling medium is hydrogen. Since hydrogen is the lightest gas, both its permeability and diffusion are strong, and hydrogen leakage is easily caused in a pressure vessel filled with hydrogen. With the increasing of the leakage amount of the hydrogen, the output of the turbonator is influenced, even the explosion is caused, so that the safety accident is caused, and therefore, the turbonator in operation has strict requirements on the leakage amount of the hydrogen.
The existing turbo-generator mainly adopts a single-flow ring, double-flow ring or three-flow ring sealing structure, the sealing structure mainly has the defect that a sealing path is not completely sealed in the working process of the turbo-generator, particularly at the horizontal joint surface position of the sealing structure, the effective separation between the inner hydrogen side (high-pressure area) and the outer side (low-pressure area) of the turbo-generator cannot be fully ensured, so that part of hydrogen can flow from the inner hydrogen side (high-pressure area) to the outer side (low-pressure area) of the turbo-generator, and therefore, the defects of air leakage, oil leakage and the like exist in the working process of the turbo-generator, particularly at the horizontal joint surface position, the oil leakage phenomenon also occurs frequently. In the working process of the turbonator, if the defects of air leakage, oil leakage and the like occur, the hydrogen supplementing amount of the turbonator is directly increased, and the application cost is correspondingly increased.
Disclosure of Invention
The invention aims to solve the technical problems that: aiming at the problems existing in the prior art, the 'return' -shaped oil sealing structure of the steam turbine generator is provided, so that the hydrogen supplementing amount of the steam turbine generator during operation is reduced, and the application cost of the steam turbine generator is reduced.
The technical problems to be solved by the invention are realized by adopting the following technical scheme: the utility model provides a turbo generator "returns" shape oil seal structure, includes transition ring, end cover and sealing seat, the transition ring forms seal structure with end cover, sealing seat respectively through the closing plate, set up first oil duct, the second oil duct that link up each other on the transition ring, first oil duct, second oil duct run through the closing plate respectively, set up the mounting groove on the end cover and be in scarf joint second sealing strip in the mounting groove, set up the mounting groove on the sealing seat and be in scarf joint first sealing strip in the mounting groove, fill sealing oil in first oil duct, second oil duct, closing plate and second sealing strip and first sealing strip form "returns" shape oil seal structure jointly.
Preferably, the transition ring is provided with a first glue injection hole, the sealing seat is provided with an annular glue injection groove communicated with the first glue injection hole, the annular glue injection groove on the sealing seat is filled with sealing glue through the first glue injection hole to form a sealing glue plug, and a sealing structure is formed between the sealing glue plug and the sealing plate.
Preferably, the transition ring is provided with a second glue injection hole, the end cover is provided with an annular glue injection groove communicated with the second glue injection hole, the annular glue injection groove on the end cover is filled with sealant through the second glue injection hole to form a sealant plug, and a sealing structure is formed between the sealant plug and the sealing plate.
Preferably, a main oil duct which is mutually communicated is arranged between the transition ring and the sealing seat, the first branch oil duct and the second branch oil duct are respectively mutually communicated with the main oil duct, and sealing oil is filled in the first branch oil duct, the second branch oil duct and the main oil duct.
Preferably, a first buffer groove is formed in the transition ring, and the first buffer groove is communicated with the main oil duct and the first branch oil duct respectively.
Preferably, a second buffer groove is formed in the transition ring, and the second buffer groove is communicated with the main oil duct and the second branch oil duct respectively.
Preferably, before the transition ring and the sealing seat are assembled, a second horizontal joint surface mating area is processed on the transition ring, a first horizontal joint surface mating area is processed on the sealing seat, and after the transition ring and the sealing seat are assembled in place, the sum of the actual contact areas of the first horizontal joint surface mating area and the second horizontal joint surface mating area occupies more than 90% of the sum of the areas of the first horizontal joint surface mating area and the second horizontal joint surface mating area.
Compared with the prior art, the invention has the beneficial effects that: the transition ring forms a sealing structure with the end cover and the sealing seat respectively through the sealing plate, and the first branch oil duct, the second branch oil duct, the sealing plate, the second sealing strip and the first sealing strip form a 'return' oil sealing structure together, so that the invention has a multiple sealing structure, thereby greatly preventing the hydrogen on the hydrogen side in the turbo generator from leaking to the outside of the turbo generator, greatly reducing the hydrogen supplementing amount when the turbo generator operates, reducing the application cost of the turbo generator and effectively improving the safe operation reliability of the turbo generator.
Drawings
Fig. 1 is a sectional view showing the construction of a "return" type oil seal structure of a turbo generator according to the present invention.
Fig. 2 is a partial enlarged view at a in fig. 1.
The marks in the figure: the sealing device comprises a transition ring 1, a first branch oil duct 2, a second buffer groove 3, a second branch oil duct 4, a sealing plate 5, a second sealing strip 6, a first sealing strip 7, an end cover 8, a first horizontal joint surface grinding and matching area 9, a main oil duct 10, a sealing seat 11, a main buffer groove 12, a third branch oil duct 13, a first buffer groove 14, a second horizontal joint surface grinding and matching area 15, a first glue injection hole 16, a sealing glue plug 17 and a second glue injection hole 18.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The "back" oil seal structure of the turbo generator shown in fig. 1 and 2 mainly comprises a transition ring 1, an end cover 8 and a seal seat 11, wherein the transition ring 1 and the end cover 8 and the seal seat 11 respectively form a seal structure through a seal plate 5, the transition ring 1 and the end cover 8 and the seal seat 11 and the transition ring 1 can be respectively fixed through bolt connection, the bolts penetrate through the seal plate 5, the seal plate 5 is preferably a rubber plate, and the seal plate 5 is usually directly adhered to the transition ring 1. The inner side of the sealing seat 11 is an inner hydrogen side, the outer side of the transition ring 1 is an outer side of the machine, wherein the inner hydrogen side is mainly high-pressure hydrogen, belongs to a high-pressure area of the generator, and the outer side of the machine is an air side, belongs to a low-pressure area of the generator. The end cover 8 is provided with a mounting groove, the mounting groove is embedded with the second sealing strip 6, the sealing seat 11 is also provided with a mounting groove, and the mounting groove is embedded with the first sealing strip 7.
A main oil duct 10 which is mutually communicated is arranged between the transition ring 1 and the sealing seat 11, and a first branch oil duct 2 and a second branch oil duct 4 which are respectively mutually communicated with the main oil duct 10 are arranged on the transition ring 1, so that the first branch oil duct 2 and the second branch oil duct 4 are mutually communicated; the sealing plate 5 is provided with corresponding through holes, the first branch oil duct 2 and the second branch oil duct 4 respectively penetrate through the sealing plate 5, sealing oil is filled in the first branch oil duct 2, the second branch oil duct 4 and the main oil duct 10, a 'return' -shaped oil sealing structure is formed by the first branch oil duct 2, the second branch oil duct 4, the sealing plate 5, the second sealing strip 6 and the first sealing strip 7, and sealing oil in the first sealing strip 7, the sealing plate 5 and the first branch oil duct 2 jointly form a sealing structure, and sealing oil in the second sealing strip 6, the sealing plate 5 and the second branch oil duct 4 jointly form a sealing structure. The cross-sectional shape of the first sealing strip 7 is preferably trumpet-shaped, so that the first sealing strip 7 is firmly engaged in the mounting groove on the sealing seat 11. Likewise, the cross-sectional shape of the second sealing strip 6 is preferably trumpet-shaped so that the second sealing strip 6 is firmly engaged in the mounting groove on the end cap 8. The first sealing strip 7 and the second sealing strip 6 are preferably annular rubber strips.
Considering that the high-pressure hydrogen in the turbo generator has strong permeability and diffusivity when the turbo generator works, in order to better avoid the high-pressure hydrogen in the generator from leaking to the outside of the generator low-pressure region, as shown in fig. 1 and 2, a first glue injection hole 16 and a second glue injection hole 18 can be formed in the transition ring 1, an annular glue injection groove communicated with the first glue injection hole 16 is formed in the sealing seat 11, and the annular glue injection groove on the sealing seat 11 is filled with sealant through the first glue injection hole 16 to form a sealant plug 17, and a sealing structure is formed between the sealant plug 17 and the sealing plate 5. An annular glue injection groove communicated with the second glue injection hole 18 is formed in the end cover 8, and the annular glue injection groove in the end cover 8 is filled with sealant through the second glue injection hole 18 to form a sealant plug 17, and a sealing structure is formed between the sealant plug 17 and the sealing plate 5. The first glue injection hole 16 and the second glue injection hole 18 are used for injecting glue, so that the return-shaped oil sealing structure of the steam turbine generator has a double-loop glue injection handle sealing surface structure, the hydrogen supplementing amount of the steam turbine generator during operation is greatly reduced, the application cost of the steam turbine generator is reduced, and the safe operation reliability of the steam turbine generator is effectively improved.
In order to further improve the sealing reliability of the "return" oil sealing structure of the turbo generator, as shown in fig. 1 and 2, a first buffer groove 14 and a second buffer groove 3 may be formed on the transition ring 1, where the first buffer groove 14 is respectively communicated with the main oil duct 10 and the first branch oil duct 2, and the second buffer groove 3 is respectively communicated with the main oil duct 10 and the second branch oil duct 4. Preferably, the first buffer slot 14 is a bar slot, and two ends of the first buffer slot respectively form arc transition parts; preferably, the second buffer tank 3 is a circular tank. In addition, the sealing seat 11 may be provided with a main buffer groove 12 and a third branch oil duct 13 which are mutually communicated, and the main buffer groove 12 and the main oil duct 10 are mutually communicated. After the structural design is adopted, a 'back' oil groove sealing structure is formed between the transition ring 1 and the sealing seat 11. Through the combination of the 'back' oil groove sealing structure, the embedded sealing structure formed by the first sealing strip 7 and the sealing seat 11 and the embedded sealing structure formed by the second sealing strip 6 and the end cover 8, the full path sealing of the turbo generator at the horizontal joint surface is further enhanced, the separation between the hydrogen inside the turbo generator and the air outside the turbo generator is ensured, the leakage phenomena such as air leakage and oil leakage during the operation of the turbo generator are greatly reduced, and the safe operation capability of the turbo generator is effectively improved.
Further, before the transition ring 1, the end cover 8 and the sealing seat 11 are assembled, a second horizontal joint surface grinding area 15 may be machined on the transition ring 1, and a first horizontal joint surface grinding area 9 may be machined on the sealing seat 11, where "grinding" refers to a metal machining process for performing plane roughness machining on the metal mating surfaces, so as to improve the actual contact area when the metal mating surfaces are mutually matched. The first horizontal joint surface grinding and matching area 9 and the second horizontal joint surface grinding and matching area 15 cover the main oil duct 10, the second horizontal joint surface grinding and matching area 15 covers the first oil duct 2 and the second oil duct 4, and sealant can be further added on contact joint surfaces of the first horizontal joint surface grinding and matching area 9 and the second horizontal joint surface grinding and matching area 15. After the transition ring 1, the end cover 8 and the sealing seat 11 are assembled in place, the first sealing strip 7 forms a sealing structure with the first branch oil duct 2 and the sealing plate 5 respectively, and the second sealing strip 6 forms a sealing structure with the second branch oil duct 4 and the sealing plate 5 respectively; and the sum of the actual contact areas of the first horizontal joint surface mating zone 9 and the second horizontal joint surface mating zone 15 is preferably more than 90% of the sum of the areas of the first horizontal joint surface mating zone 9 and the second horizontal joint surface mating zone 15. Through putting forward the requirement of grinding area of contact, adding the sealant to turbo generator horizontal joint face, can guarantee effectively that turbo generator "returns" shape oil seal structure to the hydrogen of generator internal hydrogen side and the air outside the machine between, avoid turbo generator during operation to take place leakage phenomena such as gas leakage, oil leak in horizontal joint face department to ensure turbo generator's safe operation ability.
The turbo generator's' back 'oil sealing structure has fewer components and the assembly among the related components is simpler, so the whole structure of the turbo generator's 'back' oil sealing structure is relatively simple and compact and the assembly is convenient. The sealing glue plug 17 in the turbo generator's ' back ' oil sealing structure may be formed by directly injecting glue into the first glue injection hole 16 and the second glue injection hole 18 by using a glue injection gun at a certain injection pressure. Preferably, the cross section of the sealant plug 17 is in a conical structure, so as to improve the shock resistance and the sealing reliability of the sealant plug 17 when the turbo generator works.
The foregoing description of the preferred embodiment of the invention is not intended to be limiting, but rather to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (6)
1. The utility model provides a turbo generator "returns" shape oil seal structure, includes transition ring (1), end cover (8) and sealing seat (11), transition ring (1) form sealing structure through closing plate (5) with end cover (8), sealing seat (11) respectively, its characterized in that: the transition ring (1) is provided with a first branch oil duct (2) and a second branch oil duct (4) which are mutually communicated, the first branch oil duct (2) and the second branch oil duct (4) respectively penetrate through the sealing plate (5), the end cover (8) is provided with a mounting groove and is embedded with a second sealing strip (6), the sealing seat (11) is provided with a mounting groove and is embedded with a first sealing strip (7), the first branch oil duct (2) and the second branch oil duct (4) are filled with sealing oil, and the first branch oil duct (2), the second branch oil duct (4), the sealing plate (5), the second sealing strip (6) and the first sealing strip (7) jointly form a 'return' oil sealing structure; the sealing oil in the first sealing strip (7), the sealing plate (5) and the first branch oil duct (2) form a sealing structure together, and the sealing oil in the second sealing strip (6), the sealing plate (5) and the second branch oil duct (4) form a sealing structure together;
the transition ring (1) and the sealing seat (11) are provided with a main oil duct (10) communicated with each other, the first branch oil duct (2) and the second branch oil duct (4) are respectively communicated with the main oil duct (10), and sealing oil is filled in the first branch oil duct (2), the second branch oil duct (4) and the main oil duct (10).
2. The turbo generator "return" shaped oil seal structure according to claim 1, wherein: the transition ring (1) on set up first injecting glue hole (16), set up on the seal seat (11) with first injecting glue hole (16) link up annular injecting glue groove, fill the sealing gum and form sealing gum end cap (17) in the annular injecting glue groove on to seal seat (11) through first injecting glue hole (16), form seal structure between sealing gum end cap (17) and closing plate (5).
3. The turbo generator "return" shaped oil seal structure according to claim 1, wherein: the transition ring (1) on set up second injecting glue hole (18), set up on end cover (8) with second injecting glue hole (18) link up the annular injecting glue groove, fill the sealing gum and form sealing gum end cap (17) in the annular injecting glue groove on end cover (8) through second injecting glue hole (18), form seal structure between sealing gum end cap (17) and closing plate (5).
4. A turbo generator "return" shaped oil seal according to any one of claims 1 to 3, wherein: a first buffer groove (14) is formed in the transition ring (1), and the first buffer groove (14) is communicated with the main oil duct (10) and the first branch oil duct (2) respectively.
5. The turbo generator "return" shaped oil seal structure according to claim 1, wherein: the transition ring (1) is provided with a second buffer groove (3), and the second buffer groove (3) is communicated with the main oil duct (10) and the second branch oil duct (4) respectively.
6. The turbo generator "return" shaped oil seal structure according to claim 1, wherein: before the transition ring (1) and the sealing seat (11) are assembled, a second horizontal joint surface grinding area (15) is processed on the transition ring (1), a first horizontal joint surface grinding area (9) is processed on the sealing seat (11), and after the transition ring (1) and the sealing seat (11) are assembled in place, the sum of the actual contact areas of the first horizontal joint surface grinding area (9) and the second horizontal joint surface grinding area (15) accounts for more than 90% of the sum of the areas of the first horizontal joint surface grinding area (9) and the second horizontal joint surface grinding area (15).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611154711.XA CN106787375B (en) | 2016-12-14 | 2016-12-14 | Oil seal structure is taken turns to turbo generator |
| PCT/CN2017/114364 WO2018107985A1 (en) | 2016-12-14 | 2017-12-04 | Loop-shaped oil sealing structure of steam turbine generator |
| GB1908414.4A GB2571487B (en) | 2016-12-14 | 2017-12-04 | Loop-shaped oil sealing structure of steam turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611154711.XA CN106787375B (en) | 2016-12-14 | 2016-12-14 | Oil seal structure is taken turns to turbo generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106787375A CN106787375A (en) | 2017-05-31 |
| CN106787375B true CN106787375B (en) | 2023-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611154711.XA Active CN106787375B (en) | 2016-12-14 | 2016-12-14 | Oil seal structure is taken turns to turbo generator |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN106787375B (en) |
| GB (1) | GB2571487B (en) |
| WO (1) | WO2018107985A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787375B (en) * | 2016-12-14 | 2023-04-21 | 东方电气集团东方电机有限公司 | Oil seal structure is taken turns to turbo generator |
| CN113394930A (en) * | 2021-05-25 | 2021-09-14 | 福建福清核电有限公司 | Glue injection sealing device and method for end cover of generator of nuclear power station |
| CN116760249B (en) * | 2023-08-16 | 2023-11-10 | 哈尔滨电机厂有限责任公司 | Generator on-site glue pouring process method of end glue pouring structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2346111Y (en) * | 1998-04-28 | 1999-10-27 | 牡丹江电力技术研究所 | Inserted light hydrogen-cooled turbo-generator sealed tile |
| US6193036B1 (en) * | 1997-06-30 | 2001-02-27 | Valeo | Hydrokinetic coupling apparatus with lock-up clutch for motor vehicle |
| CN2639528Y (en) * | 2003-07-21 | 2004-09-08 | 东方汽轮机厂 | Bearing box oil seal of steam turbine generator |
| CN201546766U (en) * | 2009-11-27 | 2010-08-11 | 哈尔滨电机厂有限责任公司 | Lubricating oil sealing device for turbogenerator stand type bearing |
| CN201682346U (en) * | 2010-05-25 | 2010-12-22 | 王彦军 | Double flowing ring sealing oil system of hydrogen cooling turbogenerator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU815843A1 (en) * | 1979-06-06 | 1981-03-23 | Центральное Конструкторское Бюроглавэнергоремонта | Turbogenerator with hydrogen cooling |
| CN2717099Y (en) * | 2004-06-08 | 2005-08-10 | 董乃芬 | Hydrogen cooling generator |
| CN203035951U (en) * | 2012-12-24 | 2013-07-03 | 河南华润电力首阳山有限公司 | Sealing device |
| CN204344929U (en) * | 2014-11-06 | 2015-05-20 | 上海电气电站设备有限公司 | A kind of double-current ring seal oil system |
| CN106787375B (en) * | 2016-12-14 | 2023-04-21 | 东方电气集团东方电机有限公司 | Oil seal structure is taken turns to turbo generator |
| CN206449198U (en) * | 2016-12-14 | 2017-08-29 | 东方电气集团东方电机有限公司 | A kind of steam turbine generator injecting glue type oil seal structure |
-
2016
- 2016-12-14 CN CN201611154711.XA patent/CN106787375B/en active Active
-
2017
- 2017-12-04 GB GB1908414.4A patent/GB2571487B/en active Active
- 2017-12-04 WO PCT/CN2017/114364 patent/WO2018107985A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6193036B1 (en) * | 1997-06-30 | 2001-02-27 | Valeo | Hydrokinetic coupling apparatus with lock-up clutch for motor vehicle |
| CN2346111Y (en) * | 1998-04-28 | 1999-10-27 | 牡丹江电力技术研究所 | Inserted light hydrogen-cooled turbo-generator sealed tile |
| CN2639528Y (en) * | 2003-07-21 | 2004-09-08 | 东方汽轮机厂 | Bearing box oil seal of steam turbine generator |
| CN201546766U (en) * | 2009-11-27 | 2010-08-11 | 哈尔滨电机厂有限责任公司 | Lubricating oil sealing device for turbogenerator stand type bearing |
| CN201682346U (en) * | 2010-05-25 | 2010-12-22 | 王彦军 | Double flowing ring sealing oil system of hydrogen cooling turbogenerator |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201908414D0 (en) | 2019-07-24 |
| CN106787375A (en) | 2017-05-31 |
| GB2571487A8 (en) | 2019-09-25 |
| GB2571487B (en) | 2022-03-23 |
| WO2018107985A1 (en) | 2018-06-21 |
| GB2571487A (en) | 2019-08-28 |
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