CN203453110U - Molten salt pump shaft sealing device - Google Patents
Molten salt pump shaft sealing device Download PDFInfo
- Publication number
- CN203453110U CN203453110U CN201320534071.0U CN201320534071U CN203453110U CN 203453110 U CN203453110 U CN 203453110U CN 201320534071 U CN201320534071 U CN 201320534071U CN 203453110 U CN203453110 U CN 203453110U
- Authority
- CN
- China
- Prior art keywords
- sealing
- seal
- pump
- pump shaft
- pipe
- 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.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 56
- 150000003839 salts Chemical class 0.000 title claims abstract description 41
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000012856 packing Methods 0.000 claims abstract description 21
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 20
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical class [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 24
- 210000004907 gland Anatomy 0.000 claims description 14
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 14
- 239000000945 filler Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a molten salt pump shaft sealing device. Shaft sealing zero leakage of a molten salt pump is achieved by using the three-level sealing device, wherein the three-level sealing device is formed by a spiral dynamic seal, a nitrogen pressure seal and a packing seal, the spiral dynamic seal serves as a main sealing unit, and the nitrogen pressure seal and the packing seal serve as auxiliary sealing units. The molten salt pump shaft sealing device solves the problems that a traditional sealing device is short in service life and coagulated molten salt can scratch a pump shaft easily; the molten salt pump shaft sealing device is simple and reasonable in structure and especially suitable for a high-temperature molten salt pump.
Description
Technical field
The utility model relates to pump for liquid salts field, especially a kind of pump for liquid salts gland seal device.
Background technique
The shaft seal problem of high-temperature melting salt pump is the technological difficulties of pump for liquid salts safe operation always, because its fed sheet of a media high-temperature molten salt temperature is very high, between 300 ℃ to 700 ℃, and can crystallization be solid particle when temperature drops to 200 ℃ of left and right.Traditional mechanical seal, packing seal problem when pump for liquid salts moves is little, once but after pump shutdown, fused-salt medium cooling, the medium that remains in a large number sealing station place is condensed into solid, be bonded in sealing station, cause the sealed member life-span very short, so for the fused-salt medium that has phase transformation, traditional gland seal device is not competent.The pump shaft surface of the high-temperature melting salt pump of developing recently in its drain pipe, throttling Epsom salts pipe is installed, makes fused salt directly not enter shaft seal position, upper end, solved shaft seal problem, but therefore lost a large amount of hydraulic efficiencies simultaneously, caused existing pump for liquid salts efficiency generally all below 40%.Therefore, research pump for liquid salts stage shaft seal device moves and has great importance safely and efficiently for pump for liquid salts.
Model utility content
The technical problems to be solved in the utility model is: a kind of pump for liquid salts gland seal device is provided, in the situation that not affecting hydraulic efficiency, realizes shaft seal zero leakage, make pump for liquid salts safe and highly efficient operation; Solved the sealing of pump for liquid salts gland seal device not enough, the problem that the life-span is shorter.
The utility model solves the technological scheme that its technical problem adopts: a kind of pump for liquid salts gland seal device, and this device is comprised of three grades of sealings; Described three grades are sealed into first order sealing screw dynamic seal, second level sealing nitrogen pressure sealing and third level stuffing box packing sealing; Described spiral dynamic seal comprises dynamic seal axle sleeve, pump shaft and sealed pipe; On dynamic seal axle sleeve interference fit pump shaft, and rotate with pump shaft, its rotation direction is determined according to pump shaft rotation direction; Described nitrogen pressure sealing is comprised of nitrogen tube sealing and sealed pipe; Described nitrogen tube sealing is connected also charged pressure nitrogen wherein with the annular chamber of sealed pipe; Described packing seal is comprised of filler, filling sealing tank and Gland; Described filling sealing tank is welded on sealed pipe top, and packing seal is in filling sealing tank.
When avoiding pump for liquid salts to move under low flow rate condition, the pressure head of generation will be over spiral dynamic seal design head, and the sealed pipe of spiral dynamic seal described in the utility model middle part is welded with the Epsom salts pipe at 90 °, three intervals; 90 °, three Epsom salts pipe intervals are evenly arranged in sealed pipe outside.
Filler described in the utility model is resistant to elevated temperatures packing filling, according to pump for liquid salts lift, determines its filler radical.
Spiral dynamic seal is first order sealing, during the dynamic seal of design spiral, according to pump for liquid salts rated lift as spiral seal pressure, fluting overall length reasonable in design, axially groove width, the axial parameter such as the facewidth, groove depth, helix angle, a number and sealing radius clearance.During pump running, the head that spiral dynamic seal formation and pumping head are suitable, opposite direction, stops medium to be revealed from sealed pipe.When pump moves under low flow rate condition, lift increases, and the medium that leaks that surpasses spiral dynamic seal design head is drained in fused salt tank by Epsom salts pipe.
Nitrogen pressure is sealed into second level sealing, pressure nitrogen gas is filled with in sealed pipe annular chamber, can be effectively that medium and air is isolated, the problem of oxidation of avoiding dielectric surface to cause due to high temperature, simultaneously when fused-salt medium surpasses Epsom salts pipe, nitrogen-sealed produces pressure in annular chamber, avoids fused-salt medium to enter annular chamber, makes Epsom salts pipe Epsom salts safer.
Packing seal is afterbody sealing, guarantees the fused-salt medium leakage problem that may cause under other fortuitous events.
The beneficial effects of the utility model are, have solved the defect existing in background technique, and the three-stage sealing device that uses spiral dynamic seal, nitrogen pressure sealing and packing seal to form, has realized the zero leakage of pump for liquid salts shaft seal; Spiral dynamic seal is main sealing device, and nitrogen pressure sealing and packing seal are auxiliary sealing device, have solved conventional seals short device lifetime, and the fused salt solid condensing easily scratches the problems such as pump shaft; The utility model apparatus structure is simple, reasonable, is particularly useful for high-temperature melting salt pump.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the structural representation of preferred embodiment of the present utility model;
In figure: 1. pump-foot, 2. fluid bend pipe, 3. dynamic seal axle sleeve, 4. sealed pipe, 5. packing seal, 6. Gland, 7. filling sealing tank, 8. nitrogen tube sealing, 9. Epsom salts pipe, 10. pump shaft.
Embodiment
With preferred embodiment, the utility model is described in further detail by reference to the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present utility model is only described in a schematic way, so it only show the formation relevant with the utility model.
The stage shaft seal device of a kind of high-temperature melting salt pump as shown in Figure 1, is comprised of spiral dynamic seal, nitrogen pressure sealing and packing seal.
Pump-foot (1), fluid bend pipe (2), sealed pipe (4) are welded as a whole, and must guarantee the higher coaxality of three.Fluid bend pipe (2) must arrange stiffening rib with pump-foot (1) weld, and while preventing high temperature, the thermal stress deformation of fluid bend pipe (2), causes sealed pipe (4) and pump shaft (10) bias, the problem of aggravation dynamic seal axle sleeve (3) wearing and tearing.
Spiral dynamic seal is first order sealing, dynamic seal axle sleeve (3), pump shaft (10) and sealed pipe (4), consists of.Dynamic seal axle sleeve (3) interference fit pump shaft (10) is upper, and rotates with axle, and its rotation direction is determined according to main shaft rotation direction, from motor drive direction, main shaft turns clockwise, and spiral seal is left-handed thread, spindle axis counterclockwise rotation, spiral seal is right-handed thread.When pump for liquid salts moves, the pressure head that spiral dynamic seal formation and pumping head are suitable, direction in contrast, thereby stop fused-salt medium to be revealed from sealed pipe.When avoiding pump for liquid salts to move under low flow rate condition, therefore the pressure head of generation will be welded with 90 °, three Epsom salts pipes (9) interval and evenly be arranged in sealed pipe outside over spiral dynamic seal design head, and the fused-salt medium leaking is drained in fused salt tank.Nitrogen pressure is sealed into second level sealing, by nitrogen tube sealing (8), sealed pipe (4), formed, pressure nitrogen gas is filled with in sealed pipe annular chamber, can be effectively that medium and air is isolated, the problem of oxidation of avoiding dielectric surface high temperature to cause, when fused-salt medium surpasses Epsom salts pipe (9), nitrogen-sealed produces pressure in annular chamber simultaneously, avoid fused-salt medium to enter annular chamber, make Epsom salts pipe Epsom salts safer.Packing seal is afterbody sealing, packing seal (5), filling sealing tank (7) and Gland (6), consists of.Filling sealing tank (7) welded seal pipe (4) top, packing seal (5) adopts resistant to elevated temperatures packing filling, according to pump for liquid salts lift, determines its filler radical, is sealed in filling sealing tank (7), and it is not directly contacted with high-temperature molten salt.The three-stage sealing device being comprised of spiral dynamic seal, nitrogen pressure sealing and packing seal, has realized the zero leakage of pump for liquid salts shaft seal.
What in above specification, describe is embodiment of the present utility model, various not illustrating is construed as limiting flesh and blood of the present utility model, person of an ordinary skill in the technical field read after specification can to before described embodiment make an amendment or be out of shape, and do not deviate from essence and the scope of model utility.
Claims (4)
1. a pump for liquid salts gland seal device, is characterized in that: this device is comprised of three grades of sealings; Described three grades are sealed into first order sealing screw dynamic seal, second level sealing nitrogen pressure sealing and third level stuffing box packing sealing; Described spiral dynamic seal comprises dynamic seal axle sleeve, pump shaft and sealed pipe; On dynamic seal axle sleeve interference fit pump shaft, and rotate with pump shaft, its rotation direction is determined according to pump shaft rotation direction; Described nitrogen pressure sealing is comprised of nitrogen tube sealing and sealed pipe; Described nitrogen tube sealing is connected also charged pressure nitrogen wherein with the annular chamber of sealed pipe; Described packing seal is comprised of filler, filling sealing tank and Gland; Described filling sealing tank is welded on sealed pipe top, and packing seal is in filling sealing tank.
2. a kind of pump for liquid salts gland seal device as claimed in claim 1, is characterized in that: the sealed pipe middle part of described spiral dynamic seal is welded with the Epsom salts pipe at 90 °, three intervals.
3. a kind of pump for liquid salts gland seal device as claimed in claim 2, is characterized in that: 90 °, described three Epsom salts pipe intervals are evenly arranged in sealed pipe outside.
4. a kind of pump for liquid salts gland seal device as claimed in claim 1, is characterized in that: described filler is resistant to elevated temperatures packing filling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320534071.0U CN203453110U (en) | 2013-08-29 | 2013-08-29 | Molten salt pump shaft sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320534071.0U CN203453110U (en) | 2013-08-29 | 2013-08-29 | Molten salt pump shaft sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203453110U true CN203453110U (en) | 2014-02-26 |
Family
ID=50132989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320534071.0U Expired - Lifetime CN203453110U (en) | 2013-08-29 | 2013-08-29 | Molten salt pump shaft sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203453110U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104421196A (en) * | 2013-08-29 | 2015-03-18 | 江苏太阳宝新能源有限公司 | Molten salt pump shaft seal device |
| CN106762702A (en) * | 2016-12-27 | 2017-05-31 | 重庆博张机电设备有限公司 | A kind of fused salt submerged pump |
| CN107664137A (en) * | 2017-11-03 | 2018-02-06 | 湖北省天门立光泵业有限公司 | A kind of unpowered sealing device of pump for liquid salts |
-
2013
- 2013-08-29 CN CN201320534071.0U patent/CN203453110U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104421196A (en) * | 2013-08-29 | 2015-03-18 | 江苏太阳宝新能源有限公司 | Molten salt pump shaft seal device |
| CN106762702A (en) * | 2016-12-27 | 2017-05-31 | 重庆博张机电设备有限公司 | A kind of fused salt submerged pump |
| CN106762702B (en) * | 2016-12-27 | 2019-09-17 | 重庆博张机电设备有限公司 | A kind of fused salt submerged pump |
| CN107664137A (en) * | 2017-11-03 | 2018-02-06 | 湖北省天门立光泵业有限公司 | A kind of unpowered sealing device of pump for liquid salts |
| CN107664137B (en) * | 2017-11-03 | 2024-01-30 | 湖北省天门立光泵业有限公司 | Unpowered sealing device for molten salt pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160623 Address after: Wujin Jiaze town 213146 area in Jiangsu city of Changzhou Province on village Taihe view of 4 Patentee after: Yin Su Address before: Wujin Jiaze town 213146 area in Jiangsu city of Changzhou province Hou Yu Jie Tai He Road No. 4 Patentee before: CHANGZHOU SUNHOME SOLAR WATER HEATER MANUFACTURE Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170503 Address after: 213146 Jiangsu City, Wujin Province, Wu Chang Road, No. 18, Changzhou science and Technology City, Chong Chong Hong Kong, No. 1 C108 Patentee after: JIANGSU UNITED STORAGE TECHNOLOGY CO.,LTD. Address before: Wujin Jiaze town 213146 area in Jiangsu city of Changzhou Province on village Taihe view of 4 Patentee before: Yin Su |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140226 |