CN107664137B - Unpowered sealing device for molten salt pump - Google Patents
Unpowered sealing device for molten salt pump Download PDFInfo
- Publication number
- CN107664137B CN107664137B CN201711069147.6A CN201711069147A CN107664137B CN 107664137 B CN107664137 B CN 107664137B CN 201711069147 A CN201711069147 A CN 201711069147A CN 107664137 B CN107664137 B CN 107664137B
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- CN
- China
- Prior art keywords
- sealing
- sealing ring
- pump
- shaft sleeve
- ring
- 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.)
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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 197
- 150000003839 salts Chemical class 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 210000004907 gland Anatomy 0.000 claims abstract description 10
- 230000008878 coupling Effects 0.000 claims abstract description 9
- 238000010168 coupling process Methods 0.000 claims abstract description 9
- 238000005859 coupling reaction Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims 1
- 230000005484 gravity Effects 0.000 abstract description 3
- 239000000126 substance Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- -1 Li-Be Chemical class 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
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 230000007306 turnover Effects 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
Abstract
The invention discloses an unpowered sealing device for a molten salt pump, which mainly comprises the following components: the device comprises a motor, a transmission shaft, an intermediate coupling, a pump shaft, an impeller, a water suction pipeline, a drainage pipeline, a sealing shell, an upper sealing ring, a shaft sleeve, a lower sealing ring and a sealing gland; the pump shaft passes through the sealing shell through the shaft sleeve; the upper sealing ring is arranged above the sealing shell and is matched and sealed with the shaft sleeve; the lower part of the upper sealing ring is provided with a circle of groove, the upper part of the sealing shell is provided with a circle of bulge, and the groove of the upper sealing ring is correspondingly matched and sealed with the bulge of the sealing shell; the lower sealing ring is arranged below the sealing shell and is matched and sealed with the shaft sleeve; the upper sealing ring, the shaft sleeve and the lower sealing ring form a sealing structure. The invention aims to provide an unpowered sealing device which can realize sealing of a pump by utilizing gravity of the pump and pressure difference generated by operation of the pump.
Description
Technical Field
The invention relates to the field of pump sealing, in particular to an unpowered sealing device for a molten salt pump.
Background
The molten salt pump is a pump specially used for conveying high-temperature molten salt and is widely applied to the fields of chemical industry, nuclear energy and solar energy. In the chemical field, a molten salt pump is generally used for preparing chemical products such as melamine, salt production, alkali production, urea and the like, and delivering substances such as nitrate, caustic soda and the like at the temperature of 400-460 ℃; in advanced nuclear energy and photo-thermal power stations in the future, the molten salt pump is mainly used for conveying heat storage and heat transfer media, and the conveying is mixed molten salt (such as Li-Be, li-F and the like) with higher heat storage capacity and excellent heat conduction performance, and the temperature of the media can reach 700 ℃ or even exceed 1000 ℃.
The unpowered sealing device studied by the invention aims at waterproof sealing operation of the long-axis pump under water, and is particularly important for stable operation of the long-axis pump.
Chinese patent application No. 201180049959.9 discloses a sealing device for a pump comprising a sealing housing configured to be received in a housing of the pump, and a sealing assembly received in the sealing housing, the sealing assembly being rotatable about the sealing housing, without the need to disassemble a pump shaft from the pump when retrofitting the pump assembly, but the sealing device is not capable of efficiently utilizing energy generated by operation of the pump.
The patent of application number 201620341939.9 discloses a sealing device for pump, is provided with first sealing washer and second sealing washer on the sealing lid, and both diameters are the same, and the second sealing washer is connected with the closing plate, is provided with the reservation mouth of water pipe and cable on the closing plate, and reservation mouth department is provided with sealing device, the device can prevent that water from entering into the pump body, but can also not influence the business turn over of water pipe and cable, but this sealing device is inflexible, also can not effectually utilize the energy that the pump operation produced.
The patent application number 201520118506.2 discloses a pump seal structure comprising: the sealing baffle sleeve and the spiral groove on the outer wall of the sealing baffle sleeve. The seal oil is able to remain in the spiral groove in a dynamic balance as it moves in the spiral groove, effectively controlling the amount of seal oil that enters the cavity of the pump body. In addition, the sealing oil in the spiral groove not only plays a role in sealing, but also plays a role in isolating a sealing cavity and cooling a part, which is in contact with the sealing stop sleeve and the pump body, but the sealing device still cannot effectively utilize energy generated by operation of the pump.
Disclosure of Invention
In view of the above-mentioned drawbacks, the present invention provides an unpowered sealing device that can utilize the gravity of the pump itself and the pressure differential generated by the operation of the pump to achieve sealing of the pump.
The technical scheme adopted for achieving the purpose is as follows:
an unpowered sealing device for a molten salt pump, the device mainly comprising: the device comprises a motor, a transmission shaft, an intermediate coupling, a pump shaft, an impeller, a water suction pipeline, a drainage pipeline, a sealing shell, an upper sealing ring, a shaft sleeve, a lower sealing ring and a sealing gland; the pump shaft passes through the sealing shell through the shaft sleeve; the upper sealing ring is arranged above the sealing shell and is matched and sealed with the shaft sleeve; the lower part of the upper sealing ring is provided with a circle of groove, the upper part of the sealing shell is provided with a circle of bulge, and the groove of the upper sealing ring is correspondingly matched and sealed with the bulge of the sealing shell; the lower sealing ring is arranged below the sealing shell and is matched and sealed with the shaft sleeve; the upper sealing ring, the shaft sleeve and the lower sealing ring form a sealing structure.
The transmission shaft and the pump shaft are vertical downwards along the central axis, the transmission shaft and the pump shaft are connected by an intermediate coupling, the motor is fixed at the uppermost part of the transmission shaft, and main components are as follows from top to bottom in sequence: the upper sealing ring, the sealing shell, the shaft sleeve, the lower sealing ring and the impeller are fixed at the extreme end of the pump shaft.
The device is mainly used for underwater working conditions, a shaft connected with a motor is arranged on an impeller of the device, a waterproof sealing device is arranged at the joint of the pump body and the pump shaft in order to prevent water from immersing into the pump body through a gap of the pump shaft, and an upper sealing ring and a lower sealing ring are arranged on the rotating shaft to form the unpowered sealing device for the pump.
Further, a circle of counter bore is arranged at the edge of the inner ring at the lower end of the shaft sleeve, and the outer diameter of the lower sealing ring is slightly smaller than the inner diameter of the counter bore at the edge of the inner ring at the lower end of the shaft sleeve.
Further, the water suction pipe is located right below the impeller, and water flow enters from the water suction pipe.
Further, the water discharge pipeline should be located at the side of the impeller, and the water flow is discharged from the water discharge pipeline.
Further, the pump shaft is provided with clamping grooves at the positions matched with the upper sealing ring and the lower sealing ring, and the bayonet width of the clamping grooves along the axial direction of the pump shaft is more than 2/3 of the thickness of the inner sealing ring and is not more than the thickness of the inner sealing ring.
Further, a circle of grooves are arranged at the contact part of the upper sealing ring and the sealing shell, and the grooves of the upper sealing ring are correspondingly matched and sealed with the upper part and the lower part of the bulge of the sealing shell.
Further, the outer diameter of the upper seal ring should be larger than the outer diameter of the sleeve. The upper sealing ring main body is of a steel structure, a layer of rubber O-shaped ring is arranged at the contact position with the sealing shell, a groove of the upper sealing ring and a bulge of the sealing shell are correspondingly formed into a first seal, and the upper sealing ring and the shaft sleeve form a second seal.
Further, the shaft sleeve main body is of a steel structure, the lower sealing ring at the clamping groove at the lower part of the shaft sleeve is a V-shaped ring with high-temperature corrosion resistance, and when the pressure rises, the sealing performance of the lower sealing ring and the clamping groove at the lower part of the shaft sleeve is better.
Further, the cross section of a circle of bulges on the sealing shell is trapezoidal.
Further, the pump body is protected by a seal housing through which the pump shaft passes through the shaft sleeve.
Further, the pump shaft passes through the waterproof shell through a shaft sleeve fixed on the sealing shell.
Further, a sealing gland is arranged below the shaft sleeve of the device, and the sealing gland is fixed by bolts.
The beneficial effects of the invention are as follows:
according to the invention, the sealing of the pump is realized by utilizing the pressure generated by the shut-down backwater of the pump and the negative pressure generated by the operation of the pump, so that the sealing of the pump is more flexible and reliable, the resistance generated by the operation of the pump is reduced, and the operation efficiency of the pump is greatly improved.
Drawings
Fig. 1 is a structural view of the apparatus.
Fig. 2 is a partial cross-sectional view of the sealing device a of fig. 1.
Fig. 3 is an enlarged view of the pump body.
Fig. 4 is a partial sectional view of the sealing device B of fig. 2.
Wherein: 1. the motor comprises a motor, a shaft coupler, a motor bracket, a transmission shaft, a bearing, an intermediate shaft coupler, a pump shaft, a sealing chamber, a sealing body, a pump cover, an impeller, a pump body, a water suction pipeline, a water discharge pipeline, a sealing shell, a sealing ring, a shaft sleeve, a lower sealing ring, a sealing gland, a bolt and a groove, and a protrusion.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description:
fig. 1 is a structural view of the device, fig. 2 is a partial sectional view of the sealing device a of fig. 1, fig. 3 is an enlarged view of the pump body, and fig. 4 is a partial sectional view of the sealing device B of fig. 2, as shown in fig. 1, 2, 3, and 4.
The unpowered sealing device for the molten salt pump mainly comprises a motor 1, a shaft coupling 2, a motor bracket 3, a transmission shaft 4, a bearing 5, an intermediate shaft coupling 6, a pump shaft 7, a sealing chamber 8, a sealing body 9, a pump cover 10, an impeller 11, a pump body 12, a water suction pipeline 13, a drainage pipeline 14, a sealing shell 15, an upper sealing ring 16, a shaft sleeve 17, a lower sealing ring 18, a sealing gland 19, a bolt 20, a groove 21, a bulge 22 and other parts, and the sealing effect of the pump is realized through pressure difference.
As shown in fig. 2 and 3, the transmission shaft 4 and the pump shaft 7 of the device should be vertically downward along the central axis, the motor 1 is fixed at the uppermost part of the transmission shaft 4, and the main components are as follows from top to bottom: the device comprises a transmission shaft 4, an intermediate coupling 6, a pump shaft 7, a sealing shell 15, an upper sealing ring 16, a shaft sleeve 17, a lower sealing ring 18 and an impeller 11, wherein the impeller 11 is fixed at the extreme end of the pump shaft.
The device is mainly used for underwater working conditions, a transmission shaft 4 connected with a motor 1 is arranged on an impeller 11 of the device, the transmission shaft 4 is connected with a pump shaft 7 through an intermediate coupling 6, in order to prevent water from passing through, a gap of the pump shaft 7 is immersed into a pump body, a waterproof sealing device is arranged at the joint of a sealing shell 15 and the pump shaft 7, and an upper sealing ring and a lower sealing ring are arranged on the pump shaft 7 to form the unpowered sealing device for the molten salt pump.
The pump shaft 7 of the device is provided with a clamping groove at the position matched with the upper sealing ring 16 and the lower sealing ring 18, and the depth of the clamping groove is more than 2/3 of the thickness of the sealing ring and is not more than the thickness of the sealing ring.
The main body of the upper sealing ring 16 of the device is of a steel structure, and a layer of O-shaped ring with high temperature corrosion resistance is arranged at the contact part with the sealing shell 15. The main body of the shaft sleeve 17 of the device is of a steel structure, a clamping groove is formed in the lower portion of the shaft sleeve 17 and is matched and sealed with the lower sealing ring 18, the diameter of the clamping groove is not smaller than the inner diameter of the lower sealing ring 18, the lower sealing ring 18 at the clamping groove of the lower portion of the shaft sleeve 17 is a V-shaped ring resistant to high temperature corrosion, and when the pressure is increased, the sealing performance is better.
Further, a sealing gland 19 is arranged below the shaft sleeve 17 of the device, and is fixed by bolts 20.
Further, a circle of counter bore is arranged at the inner ring edge of the lower end of the shaft sleeve 17, and the outer diameter of the lower sealing ring 18 is slightly smaller than the inner diameter of the counter bore at the inner ring edge of the lower end of the shaft sleeve 17.
As shown in fig. 4, a circle of grooves 21 are formed at the contact position of the upper sealing ring 16 and the sealing shell 15 of the device, and the grooves are correspondingly sealed with protrusions 22 on the sealing shell 15, so that the sealing effect is better due to the cooperation of the grooves and the protrusions.
Further, the ring of projections 22 on the sealing shell 15 of the device is trapezoidal in cross section.
As shown in fig. 1-4, an embodiment of a structure of an unpowered sealing device for a molten salt pump is provided, and the structure mainly comprises a motor 1, a transmission shaft 4, an intermediate coupling 6, a pump shaft 7, an impeller 11, a water suction pipeline 13, a drainage pipeline 14, a sealing shell 15, an upper sealing ring 16, a shaft sleeve 17, a lower sealing ring 18, a sealing gland 19 and the like.
When the motor 1 is started, negative pressure pumping is formed at the water suction pipeline 13, the impeller 11 is subjected to downward pressure, the pump shaft 7 connected with the impeller 11 is subjected to downward force from the impeller 11 and gravity of the pump, so that the upper sealing ring 16 and the sealing shell 15 are pressed by force, the groove 21 and the bulge 22 are matched to form a first seal, and the upper sealing ring 16 is matched with the shaft sleeve 17 by force to form a second seal;
when the motor 1 is stopped, 14 is drained, the water pipeline returns, the impeller 11 receives upward pressure, the pump shaft 7 connected with the impeller 11 receives pressure from the impeller 11, a pressure difference is formed between the pump shaft 7 and the sealing chamber 9, at the moment, the unpowered sealing device receives upward pressure, the pump shaft 7 is applied to the upper sealing ring 16 and the lower sealing ring 18, and the upper sealing ring 16, the lower sealing ring 18 and the shaft sleeve 17 are pressed tightly to form a seal.
In view of the foregoing, the present invention is specifically described with reference to the embodiments, but the present invention is not limited to the embodiments described above, and other embodiments or modifications within the scope of the inventive concept are also included.
Claims (7)
1. An unpowered sealing device for a molten salt pump, the device mainly comprising: the device comprises a motor (1), a transmission shaft (4), an intermediate coupling (6), a pump shaft (7), an impeller (11), a water suction pipeline (13), a drainage pipeline (14), a sealing shell (15), an upper sealing ring (16), a shaft sleeve (17), a lower sealing ring (18) and a sealing gland (19); the method is characterized in that: the pump shaft (7) passes through the sealing shell (15) through the shaft sleeve (17); the upper sealing ring (16) is arranged above the sealing shell (15) and is matched and sealed with the shaft sleeve (17); the lower part of the upper sealing ring (16) is provided with a circle of groove, the upper part of the sealing shell (15) is provided with a circle of bulge, and the groove of the upper sealing ring (16) is correspondingly matched and sealed with the bulge of the sealing shell (15); the lower sealing ring (18) is arranged below the sealing shell (15) and is matched and sealed with the shaft sleeve (17);
a circle of counter bore is formed in the edge of the inner ring at the lower end of the shaft sleeve (17), and the outer diameter of the lower sealing ring (18) is slightly smaller than the inner diameter of the counter bore in the edge of the inner ring at the lower end of the shaft sleeve (17);
clamping grooves are formed in the positions, matched with the upper sealing ring (16) and the lower sealing ring (18), of the pump shaft (7);
the outer diameter of the upper sealing ring (16) is larger than that of the shaft sleeve (17);
a circle of grooves are formed in the part, which is contacted with the sealing shell (15), of the upper sealing ring (16), and the grooves of the upper sealing ring (16) are correspondingly sealed with the protrusions of the sealing shell (15) up and down;
the upper sealing ring (16), the shaft sleeve (17) and the lower sealing ring (18) form a sealing structure;
a sealing gland (19) is arranged below the shaft sleeve (17) and is fixed by a bolt (20).
2. The unpowered sealing device for the molten salt pump as set forth in claim 1, wherein: the water suction pipeline (13) is arranged right below the impeller, and water flow enters from the water suction pipeline (13).
3. The unpowered sealing device for the molten salt pump as set forth in claim 1, wherein: the water discharge pipeline (14) is arranged on the side surface of the impeller, and water flow is discharged from the water discharge pipeline (14).
4. The unpowered sealing device for the molten salt pump as set forth in claim 1, wherein: the pump shaft (7) is provided with clamping grooves at the positions matched with the upper sealing ring (16) and the lower sealing ring (18), and the bayonet width of the clamping grooves along the axial direction of the pump shaft (7) is more than 2/3 of the thickness of the inner sealing ring and is not more than the thickness of the inner sealing ring.
5. The unpowered sealing device for the molten salt pump as set forth in claim 1, wherein: the main body of the upper sealing ring (16) is of a steel structure, a layer of rubber O-shaped ring is arranged at the position contacted with the sealing shell (15), a groove of the upper sealing ring (16) corresponds to a bulge of the sealing shell (15) to form a first seal, and the upper sealing ring (16) and the shaft sleeve (17) form a second seal.
6. The unpowered sealing device for the molten salt pump as set forth in claim 1, wherein: the main body of the shaft sleeve (17) is of a steel structure, the lower sealing ring (18) at the clamping groove at the lower part of the shaft sleeve (17) is a V-shaped ring with high-temperature corrosion resistance, and when the pressure rises, the sealing performance between the lower sealing ring (18) and the clamping groove at the lower part of the shaft sleeve (17) is better.
7. The unpowered sealing device for the molten salt pump as set forth in claim 6, wherein: a circle of bulges on the sealing shell (15) are trapezoid in cross section.
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 CN107664137A (en) | 2018-02-06 |
| CN107664137B true 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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107664137A (en) | 2018-02-06 |
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