CN107664137A - A kind of unpowered sealing device of pump for liquid salts - Google Patents
A kind of unpowered sealing device of pump for liquid salts Download PDFInfo
- Publication number
- CN107664137A CN107664137A CN201711069147.6A CN201711069147A CN107664137A CN 107664137 A CN107664137 A CN 107664137A CN 201711069147 A CN201711069147 A CN 201711069147A CN 107664137 A CN107664137 A CN 107664137A
- Authority
- CN
- China
- Prior art keywords
- pump
- capsul
- axle sleeve
- sealing ring
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 123
- 150000003839 salts Chemical class 0.000 title claims abstract description 24
- 239000007788 liquid Substances 0.000 title claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 210000004907 gland Anatomy 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000007797 corrosion Effects 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000002775 capsule Substances 0.000 claims description 2
- 230000008878 coupling Effects 0.000 abstract description 10
- 238000010168 coupling process Methods 0.000 abstract description 10
- 238000005859 coupling reaction Methods 0.000 abstract description 10
- 230000005484 gravity Effects 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910006561 Li—F Inorganic materials 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- -1 by motor 1 Chemical class 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Mainly included with unpowered sealing device, device the invention discloses a kind of pump for liquid salts：Motor, power transmission shaft, intermediate shaft coupling, pump shaft, impeller, suction line, discharge pipe line, capsul, upper sealing ring, axle sleeve, lower seal, sealing gland；Pump shaft passes through capsul by axle sleeve；Upper sealing ring is in the top of capsul, with axle sleeve fitted seal；One circle groove is arranged at the bottom of upper sealing ring, and circle projection, the groove of upper sealing ring and the raised corresponding fitted seal of capsul are arranged at the top of capsul；Lower seal is in the lower section of capsul, with axle sleeve fitted seal；Upper sealing ring, axle sleeve and lower seal composition sealing structure., can be to pressure differential caused by pump gravity itself and pump operating using realizing the sealing of pump it is an object of the present invention to provide a kind of unpowered sealing device.
Description
Technical field
The present invention relates to pump seal field, specifically a kind of unpowered sealing device of pump for liquid salts.
Background technology
Pump for liquid salts is the pump for being specifically used to convey high-temperature molten salt, is widely used in chemical industry, nuclear energy and field of solar energy.
In chemical field, pump for liquid salts is generally used for the preparation flow of the chemical products such as melamine, salt manufacturing, alkaline and urea, conveying temperature
Spend the materials such as nitrate between 400-460 DEG C, caustic soda；In following advanced nuclear energy and photo-thermal power station, pump for liquid salts is main
For accumulation of heat and the conveying of heat transfer medium, conveying be with the excellent fused salt mixt class of higher heat storage capacity, heat conductivility (such as
Li-Be, Li-F etc.), medium temperature may be up to 700 DEG C, even more than 1000 DEG C.
The unpowered sealing device that the present invention studies is that this is for major axis for the underwater waterproof sealing work of long-shaft pump
The stable operation of pump is particularly important.
The Chinese invention patent of Application No. 201180049959.9 discloses a kind of sealing device of pump, including is configured
For the sealing shell being contained in the shell of the pump, and the seal assembly being contained in the sealing shell, the sealing
Component can rotate around sealing shell, when renovating pump group part, it is not necessary to dismantle pump shaft from the pump, but this sealing device can not
It is enough effectively to utilize energy caused by pump operating.
The patent of Application No. 201620341939.9 discloses a kind of Sealing used for pump, and is provided with closure
One sealing ring and the second sealing ring, both diameters are identical, and the second sealing ring is connected with sealing plate, be provided with sealing plate water pipe and
The reserved opening of cable, sealing device is provided with reserved opening, described device can prevent water from entering the pump housing, and can not also influence
To the disengaging of water pipe and cable, but this sealing device underaction, it can not effectively utilize energy caused by pump operating.
The patent of Application No. 201520118506.2 discloses a kind of pump packing structure, including：Seal interstage sleeve and sealing
Helicla flute on interstage sleeve outer wall.When motion of the Seal Oil in helicla flute, the Seal Oil can remain in dynamic equilibrium the spiral shell
In spin slot, so as to efficiently control the amount into the Seal Oil in the cavity of the pump housing.In addition, the Seal Oil in helicla flute is not
Only play a part of sealing, it also acts as the effect of isolation to annular seal space, to the part being in contact of sealing interstage sleeve and the pump housing also
Play a part of cooling, but this sealing device still can not effectively utilize energy caused by pump operating.
The content of the invention
For above-mentioned defect, the invention provides a kind of unpowered sealing device, can to pump gravity itself and
Pressure differential caused by pump operating using realizing the sealing of pump.
Technical scheme is used by realizing above-mentioned purpose：
A kind of pump for liquid salts is mainly included with unpowered sealing device, described device：Motor, power transmission shaft, intermediate shaft coupling,
Pump shaft, impeller, suction line, discharge pipe line, capsul, upper sealing ring, axle sleeve, lower seal, sealing gland；Pump shaft passes through axle
Wore capsul；Upper sealing ring is in the top of capsul, with axle sleeve fitted seal；One circle groove is arranged at the bottom of upper sealing ring,
One circle projection, the groove of upper sealing ring and the raised corresponding fitted seal of capsul are arranged at the top of capsul；Lower seal exists
The lower section of capsul, with axle sleeve fitted seal；Upper sealing ring, axle sleeve and lower seal composition sealing structure.
Power transmission shaft and pump shaft should be along axis straight down, and power transmission shaft is connected with pump shaft by intermediate shaft coupling, and motor is solid
Power transmission shaft the top is scheduled on, and then critical piece is followed successively by from top to bottom：Upper sealing ring, capsul, axle sleeve, lower seal,
Impeller, impeller are fixed on the least significant end of pump shaft.
Device is mainly used in underwater State, there is the axle for being connected to motor on the impeller of described device, to prevent water from passing through pump
The gap of axle is immersed in the pump housing, and waterproof seal should be set in the pump housing and pump shaft junction, in rotary shaft setting
Lower two sealing rings, form a kind of pump with unpowered sealing device.
Further, inner ring edge in axle sleeve lower end is provided with a circle counterbore, and the lower seal external diameter is slightly less than axle sleeve lower end
The internal diameter of inner ring edge counterbore.
Further, suction line be should be at immediately below impeller, and current are entered by suction line.
Further, discharge pipe line should be at impeller side, and current are discharged by discharge pipe line.
Further, pump shaft has neck in the place being engaged with upper sealing ring and lower seal, and the neck is along pump shaft
The bayonet socket width of axial direction should be greater than more than 2/3 installed in its inner seal ring thickness, and thick no more than its inner seal ring is arranged on
Degree.
Further, there are a circle groove, the groove of upper sealing ring and sealing in the place that upper sealing ring is in contact with capsul
The raised upper and lower corresponding fitted seal of shell.
Further, upper sealing ring external diameter should be greater than the external diameter of axle sleeve.Upper sealing ring main body is steel design, with sealing
The place of shell phase contact be one layer of rubber o-ring, and first of the raised corresponding formation of the groove of upper sealing ring and capsul is close
Envelope, upper sealing ring and axle sleeve form second sealing.
Further, axle sleeve main body is steel design, and the lower seal at the neck of axle sleeve bottom is the V-arrangement of high-temperature corrosion resistance
Circle, when pressure rise, lower seal and axle sleeve bottom neck sealing property are better.
Further, one on capsul encloses convex cross section in echelon.
Further, the pump housing is protected by capsul, and pump shaft passes through capsul by axle sleeve.
Further, pump shaft is the axle sleeve by being fixed on capsul by way of waterproof case.
Further, there is sealing gland below the axle sleeve of described device, and there is bolt to fix.
Beneficial effects of the present invention are：
The present invention by pump is shut down negative pressure caused by pressure caused by backwater and pump operating using realizing pump
Sealing, make the sealing more flexibility and reliability of pump, reduce pump operating caused by resistance, greatly improve the operation effect of pump
Rate.
Brief description of the drawings
Fig. 1 is the structure chart of the device.
Fig. 2 is the partial section at Fig. 1 sealing devices A.
Fig. 3 is the enlarged drawing of the pump housing.
Fig. 4 is the partial section at Fig. 2 sealing devices B.
Wherein：1. motor, 2. shaft couplings, 3. electric machine supports, 4. power transmission shafts, 5. bearings, 6. intermediate shaft couplings, 7. pumps
Axle, 8. closed chambers, 9. seals, 10. pump covers, 11. impellers, 12. pump housings, 13. suction lines, 14. discharge pipe lines, 15. sealings
Shell, sealing ring on 16., 17. axle sleeves, 18. lower seals, 19. sealing glands, 20. bolts, 21. grooves, 22. is raised.
Embodiment
The present invention is further described with reference to the accompanying drawings and detailed description：
As shown in accompanying drawing 1,2,3,4, Fig. 1 is the structure chart of the device, and Fig. 2 is the partial cross section at Fig. 1 sealing devices A
Figure, Fig. 3 is the enlarged drawing of the pump housing, and Fig. 4 is the partial section at Fig. 2 sealing devices B.
The unpowered sealing device of a kind of pump for liquid salts, mainly by motor 1, shaft coupling 2, electric machine support 3, power transmission shaft 4, axle
Hold 5, intermediate shaft coupling 6, pump shaft 7, closed chamber 8, seal 9, pump cover 10, impeller 11, the pump housing 12, suction line 13, drainpipe
Road 14, capsul 15, upper sealing ring 16, axle sleeve 17, lower seal 18, sealing gland 19, bolt 20, groove 21, projection 22 etc.
Each part composition, the sealing effectiveness of pump is realized by pressure differential.
As shown in Figures 2 and 3, the power transmission shaft 4 of described device and pump shaft 7 should be along axis straight down, and motor 1 is fixed on
And then the top of power transmission shaft 4, critical piece are followed successively by from top to bottom：Power transmission shaft 4, intermediate shaft coupling 6, pump shaft 7, capsul
15th, upper sealing ring 16, axle sleeve 17, lower seal 18 and impeller 11, impeller 11 are fixed on the least significant end of pump shaft.
Described device is mainly used in underwater State, there is the power transmission shaft 4 for being connected to motor 1 on the impeller 11 of described device,
Power transmission shaft 4 and pump shaft 7 are connected by intermediate shaft coupling 6, to prevent water by the way that the gap of pump shaft 7 is immersed in the pump housing, in capsul
15 should set waterproof seal with the junction of pump shaft 7, set two sealing rings up and down in the pump shaft 7, form a kind of fused salt
The unpowered sealing device of pump.
The pump shaft 7 of described device has neck, the depth of neck in the place being engaged with upper sealing ring 16 and lower seal 18
Degree should be greater than more than the 2/3 of sealing ring thickness, no more than sealing ring thickness.
The main body of upper sealing ring 16 of described device is steel design, is one layer of resistance to height in the place being in contact with capsul 15
The O-ring of temperature corrosion.The main body of axle sleeve 17 of described device is steel design, and there is neck the bottom of axle sleeve 17, matched somebody with somebody with lower seal 18
Close sealing, the diameter of neck should be not less than the internal diameter of lower seal 18, and the lower seal 18 at the bottom neck of axle sleeve 17 is resistance to height
The v shaped ring of temperature corrosion, when pressure rise, sealing property is better.
Further, there is sealing gland 19 lower section of axle sleeve 17 of described device, and has bolt 20 to fix.
Further, the lower end inner ring edge of axle sleeve 17 is provided with a circle counterbore, and the external diameter of lower seal 18 is slightly less than axle sleeve
The internal diameter of 17 lower end inner ring edge counterbores.
It is and close as shown in figure 4, the upper sealing ring 16 of described device has a circle groove 21 with the place that capsul 15 is in contact
22 corresponding sealing of projection on capsule 15, both make sealing effectiveness more preferable at cooperation.
Further, one on the capsul 15 of described device encloses raised 22 sections in echelon.
As shown in accompanying drawing 1-4, a kind of embodiment of pump for liquid salts with unpowered sealing device structure is given, the structure is main
Including motor 1, power transmission shaft 4, intermediate shaft coupling 6, pump shaft 7, impeller 11, suction line 13, discharge pipe line 14, capsul 15,
Upper sealing ring 16, axle sleeve 17, lower seal 18, the grade part of sealing gland 19.
When motor 1 starts, negative pressure pumping water is formed at suction line 13, impeller 11 is by downward pressure, with leaf
The pump shafts 7 of the connection of wheel 11 by the gravity from the downward power of impeller 11 and pump itself, make sealing ring 16 and capsul 15 by
Power extrudes, and groove 21 and projection 22 cooperatively form first of sealing, and the upper stress of sealing ring 16 cooperatively forms second with axle sleeve 17
Sealing；
When motor 1 is shut down, 14 drainage pipeline backwater, impeller 11 is upwarded pressure, the pump being connected with impeller 11
Axle 7 forms pressure differential by the pressure from impeller 11, with closed chamber 9, and now unpowered sealing device is upwarded pressure,
Upper sealing ring 16 and lower seal 18 are applied to by pump shaft 7, upper sealing ring 16, lower seal 18 and the stress of axle sleeve 17 compress shape
Into sealing.
In accordance with the above, illustrated for patent of the present invention with reference to what embodiment was made, but the present invention is not limited to
Above-described embodiment, also comprising the other embodiment or variation in the range of present inventive concept.
Claims (10)
1. a kind of pump for liquid salts is mainly included with unpowered sealing device, described device：Motor (1), power transmission shaft (4), centre connection
Axle device (6), pump shaft (7), impeller (11), suction line (13), discharge pipe line (14), capsul (15), upper sealing ring (16), axle
Cover (17), lower seal (18), sealing gland (19)；It is characterized in that：The pump shaft (7) passes through capsul by axle sleeve (17)
(15)；Upper sealing ring (16) is in the top of capsul (15), with axle sleeve (17) fitted seal；The bottom of upper sealing ring (16) has one
Enclose groove, the top of capsul (15) has that a circle is raised, and the groove of upper sealing ring (16) is raised corresponding with capsul (15)
Fitted seal；Lower seal (18) is in the lower section of capsul (15), with axle sleeve (17) fitted seal；Upper sealing ring (16), axle sleeve
(17) and lower seal (18) forms sealing structure.
A kind of 2. unpowered sealing device of pump for liquid salts as claimed in claim 1, it is characterised in that：The upper sealing ring (16) is outside
Footpath should be greater than the external diameter of axle sleeve (17).
A kind of 3. unpowered sealing device of pump for liquid salts as claimed in claim 1, it is characterised in that：In axle sleeve (17) lower end
Enclose edge and be provided with a circle counterbore, lower seal (18) external diameter is slightly less than the internal diameter of axle sleeve (17) lower end inner ring edge counterbore.
A kind of 4. unpowered sealing device of pump for liquid salts as claimed in claim 1, it is characterised in that：The suction line (13) should
Immediately below impeller, current are entered by suction line (13).
A kind of 5. unpowered sealing device of pump for liquid salts as claimed in claim 1, it is characterised in that：The discharge pipe line (14) should
In impeller side, current are discharged by discharge pipe line (14).
A kind of 6. unpowered sealing device of pump for liquid salts as claimed in claim 1, it is characterised in that：The pump shaft (7) with it is upper
There is neck in the place that sealing ring (16) and lower seal (18) are engaged, and bayonet socket width of the neck along pump shaft (7) axial direction should
More than installed in more than the 2/3 of its inner seal ring thickness, and no more than being arranged on its inner seal ring thickness.
A kind of 7. unpowered sealing device of pump for liquid salts as claimed in claim 1, it is characterised in that：The upper sealing ring (16) with
There are a circle groove, the groove of upper sealing ring (16) and the raised upper and lower phase of capsul (15) in the place that capsul (15) is in contact
Corresponding matching seals.
A kind of 8. unpowered sealing device of pump for liquid salts as claimed in claim 7, it is characterised in that：The upper sealing ring (16) is main
Body is steel design, is one layer of rubber o-ring in the place being in contact with capsul (15), the groove of upper sealing ring (16) with it is close
Raised corresponding first of sealing of formation of capsule (15), upper sealing ring (16) and axle sleeve (17) form second sealing.
A kind of 9. unpowered sealing device of pump for liquid salts as claimed in claim 1, it is characterised in that：Axle sleeve (17) main body is
Steel design, the lower seal (18) at the neck of axle sleeve (17) bottom is the v shaped ring of high-temperature corrosion resistance, when pressure rise, under
Sealing ring (18) and axle sleeve (17) bottom neck sealing property are better.
A kind of 10. unpowered sealing device of pump for liquid salts as claimed in claim 9, it is characterised in that：On the capsul (15)
One circle convex cross section in echelon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711069147.6A CN107664137B (en) | 2017-11-03 | 2017-11-03 | Unpowered sealing device for molten salt pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711069147.6A CN107664137B (en) | 2017-11-03 | 2017-11-03 | Unpowered sealing device for molten salt pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107664137A true CN107664137A (en) | 2018-02-06 |
| CN107664137B CN107664137B (en) | 2024-01-30 |
Family
ID=61143731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711069147.6A Active CN107664137B (en) | 2017-11-03 | 2017-11-03 | Unpowered sealing device for molten salt pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107664137B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833852A (en) * | 2021-08-25 | 2021-12-24 | 中国华能集团清洁能源技术研究院有限公司 | Seal assembly |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004007506U1 (en) * | 2004-05-11 | 2005-09-22 | Voith Paper Patent Gmbh | Seal for shaft feed-through in casing of pump used to transfer papermaking suspensions, comprises disc connected to shaft at diameter less than that of sealing surfaces |
| JP2006057734A (en) * | 2004-08-20 | 2006-03-02 | Mitsubishi Heavy Ind Ltd | Shaft seal device |
| CN201209585Y (en) * | 2008-06-03 | 2009-03-18 | 张国林 | Sealing arrangement for pump |
| CN201351617Y (en) * | 2009-02-06 | 2009-11-25 | 黄佳华 | Sealing device of molten salt pump |
| CN201944000U (en) * | 2010-12-13 | 2011-08-24 | 上海邦浦实业集团有限公司 | Sealing improvement between double-suction pump shaft and filling shaft sleeve |
| CN203453110U (en) * | 2013-08-29 | 2014-02-26 | 江苏太阳宝新能源有限公司 | Molten salt pump shaft sealing device |
| CN207363938U (en) * | 2017-11-03 | 2018-05-15 | 湖北省天门立光泵业有限公司 | A kind of unpowered sealing device of pump for liquid salts |
-
2017
- 2017-11-03 CN CN201711069147.6A patent/CN107664137B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004007506U1 (en) * | 2004-05-11 | 2005-09-22 | Voith Paper Patent Gmbh | Seal for shaft feed-through in casing of pump used to transfer papermaking suspensions, comprises disc connected to shaft at diameter less than that of sealing surfaces |
| JP2006057734A (en) * | 2004-08-20 | 2006-03-02 | Mitsubishi Heavy Ind Ltd | Shaft seal device |
| CN201209585Y (en) * | 2008-06-03 | 2009-03-18 | 张国林 | Sealing arrangement for pump |
| CN201351617Y (en) * | 2009-02-06 | 2009-11-25 | 黄佳华 | Sealing device of molten salt pump |
| CN201944000U (en) * | 2010-12-13 | 2011-08-24 | 上海邦浦实业集团有限公司 | Sealing improvement between double-suction pump shaft and filling shaft sleeve |
| CN203453110U (en) * | 2013-08-29 | 2014-02-26 | 江苏太阳宝新能源有限公司 | Molten salt pump shaft sealing device |
| CN207363938U (en) * | 2017-11-03 | 2018-05-15 | 湖北省天门立光泵业有限公司 | A kind of unpowered sealing device of pump for liquid salts |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833852A (en) * | 2021-08-25 | 2021-12-24 | 中国华能集团清洁能源技术研究院有限公司 | Seal assembly |
| CN113833852B (en) * | 2021-08-25 | 2024-02-06 | 中国华能集团清洁能源技术研究院有限公司 | Seal assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107664137B (en) | 2024-01-30 |
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