CN104421196A - Molten salt pump shaft seal device - Google Patents
Molten salt pump shaft seal device Download PDFInfo
- Publication number
- CN104421196A CN104421196A CN201310386182.6A CN201310386182A CN104421196A CN 104421196 A CN104421196 A CN 104421196A CN 201310386182 A CN201310386182 A CN 201310386182A CN 104421196 A CN104421196 A CN 104421196A
- Authority
- CN
- China
- Prior art keywords
- seal
- sealing
- pump
- pipe
- pump shaft
- 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.)
- Pending
Links
- 150000003839 salts Chemical class 0.000 title claims abstract description 40
- 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
- 238000007789 sealing Methods 0.000 claims description 46
- 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
- 239000007787 solid Substances 0.000 abstract description 4
- 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
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000007717 exclusion Effects 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
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Sealing Devices (AREA)
Abstract
The invention relates to a molten salt pump shaft seal device. The three-level seal device consists of a spiral dynamic seal, a nitrogen pressure seal and a packing seal, and zero leakage of the molten salt shaft seal can be realized; and the spiral dynamic seal is the main seal device, the nitrogen pressure seal and the packing seal are the secondary seal devices. The molten salt pump shaft seal device solves the problems that the service life of the traditional seal device is short and a pump shaft is easy to scratch by a congealed molten salt solid; and the device is simple and reasonable in structure, and is especially suitable for high-temperature molten salt pumps.
Description
Technical field
The present invention 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 DEG C to 700 DEG C, and can crystallization be solid particle when temperature drops to about 200 DEG C.Traditional mechanical seal, the packing seal problem when pump for liquid salts runs is little, but once after pump shutdown, fused-salt medium is lowered the temperature, the medium remaining in sealing station place is in a large number condensed into solid, be bonded in sealing station, cause the sealed member life-span very short, so for the fused-salt medium that there is phase transformation, traditional gland seal device is not competent.The pump shaft surface of the high-temperature melting salt pump developed recently in its drain pipe, throttling Epsom salts pipe is installed, makes fused salt directly not enter shaft seal position, upper end, solve shaft seal problem, but therefore have lost a large amount of hydraulic efficiencies simultaneously, cause existing pump for liquid salts efficiency general all below 40%.Therefore, research pump for liquid salts stage shaft seal device runs safely and efficiently for pump for liquid salts and has great importance.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of pump for liquid salts gland seal device, when not affecting hydraulic efficiency, realizing shaft seal zero leakage, making pump for liquid salts safe and highly efficient operation; Solve the sealing of pump for liquid salts gland seal device not enough, the problem that the life-span is shorter.
The technical solution adopted for the present invention to solve the technical problems is: a kind of pump for liquid salts gland seal device, and this device is made up 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 made up 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 made up 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 running under low flow rate condition for avoiding pump for liquid salts, the pressure head of generation will exceed spiral dynamic seal design head, be welded with the Epsom salts pipe at 90 °, three intervals in the middle part of the sealed pipe of spiral dynamic seal of the present invention; 90 °, three Epsom salts pipe intervals are evenly arranged in outside sealed pipe.
Filler of the present invention is resistant to elevated temperatures packing filling, determines its filler radical according to pump for liquid salts lift.
Spiral dynamic seal is first order sealing, during design spiral dynamic seal, according to pump for liquid salts rated lift as spiral seal pressure, and the parameters such as fluting overall length reasonable in design, axial groove width, the axial facewidth, groove depth, helix angle, head number and sealing radius clearance.During pump running, the head that spiral dynamic seal formation is suitable with pumping head, direction is contrary, stops medium to be revealed from sealed pipe.When pump runs under low flow rate condition, lift increases, and the medium that leaks exceeding 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 effectively by medium and air exclusion, avoid the problem of oxidation that dielectric surface causes due to high temperature, simultaneously when fused-salt medium exceedes 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, the fused-salt medium leakage problem that may cause under ensureing other fortuitous events.
The invention has the beneficial effects as follows, solve the defect existed in background technique, the three-stage sealing device using spiral dynamic seal, nitrogen pressure sealing and packing seal to form, achieves 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, and solve the conventional sealing apparatus life-span short, the fused salt solid of condensation easily scratches the problems such as pump shaft; Apparatus of the present invention are simple and reasonable for structure, are particularly useful for high-temperature melting salt pump.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of the preferred embodiments of the present invention;
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
The present invention is further detailed explanation with preferred embodiment by reference to the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
The stage shaft seal device of a kind of high-temperature melting salt pump as shown in Figure 1, is sealed by spiral dynamic seal, nitrogen pressure and packing seal forms.
Pump-foot (1), fluid bend pipe (2), sealed pipe (4) are welded as a whole, and must ensure the coaxality that three is higher.Fluid bend pipe (2) and pump-foot (1) weld must arrange stiffening rib, and when preventing high temperature, the thermal stress deformation of fluid bend pipe (2), causes sealed pipe (4) eccentric with pump shaft (10), the problem that aggravation dynamic seal axle sleeve (3) is worn and torn.
Spiral dynamic seal is first order sealing, is made up of dynamic seal axle sleeve (3), pump shaft (10) and sealed pipe (4).On dynamic seal axle sleeve (3) interference fit pump shaft (10), and rotate with axle, its rotation direction is determined according to main shaft rotation direction, from motor drive direction, main shaft turns clockwise, then spiral seal is left-handed thread, spindle axis counterclockwise rotates, then spiral seal is right-handed thread.When pump for liquid salts runs, the pressure head that spiral dynamic seal formation is suitable with pumping head, direction in contrast, thus stops fused-salt medium to be revealed from sealed pipe.When running under low flow rate condition for avoiding pump for liquid salts, the pressure head of generation will exceed spiral dynamic seal design head, therefore be welded with 90 °, three Epsom salts pipe (9) intervals and will evenly be arranged in outside sealed pipe, be drained in fused salt tank by the fused-salt medium leaked.Nitrogen pressure is sealed into second level sealing, be made up of nitrogen tube sealing (8), sealed pipe (4), pressure nitrogen gas is filled with in sealed pipe annular chamber, can effectively by medium and air exclusion, avoid the problem of oxidation that dielectric surface high temperature causes, simultaneously when fused-salt medium exceedes Epsom salts pipe (9), nitrogen-sealed produces pressure in annular chamber, avoid fused-salt medium to enter annular chamber, make Epsom salts pipe Epsom salts safer.Packing seal is afterbody sealing, is made up of packing seal (5), filling sealing tank (7) and Gland (6).Filling sealing tank (7) welded seal pipe (4) top, packing seal (5) adopts resistant to elevated temperatures packing filling, determines its filler radical according to pump for liquid salts lift, is sealed in filling sealing tank (7), makes it directly not contact with high-temperature molten salt.The three-stage sealing device be made up of spiral dynamic seal, nitrogen pressure sealing and packing seal, achieves the zero leakage of pump for liquid salts shaft seal.
The just the specific embodiment of the present invention described in above specification, various illustrating is not construed as limiting flesh and blood of the present invention, person of an ordinary skill in the technical field after having read specification can to before described embodiment make an amendment or be out of shape, and do not deviate from essence of an invention and scope.
Claims (4)
1. a pump for liquid salts gland seal device, is characterized in that: this device is made up 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 made up 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 made up 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 Epsom salts pipe being welded with 90 °, three intervals in the middle part of the sealed pipe of described spiral dynamic seal.
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 outside sealed pipe.
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 |
|---|---|---|---|
| CN201310386182.6A CN104421196A (en) | 2013-08-29 | 2013-08-29 | Molten salt pump shaft seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310386182.6A CN104421196A (en) | 2013-08-29 | 2013-08-29 | Molten salt pump shaft seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104421196A true CN104421196A (en) | 2015-03-18 |
Family
ID=52971082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310386182.6A Pending CN104421196A (en) | 2013-08-29 | 2013-08-29 | Molten salt pump shaft seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104421196A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990088A (en) * | 2015-06-18 | 2015-10-21 | 惠州东江威立雅环境服务有限公司 | Security monitoring and emergency processing system and method for burning material pit |
| CN108087324A (en) * | 2017-12-28 | 2018-05-29 | 四川省自贡工业泵有限责任公司 | The spiral sealing device of vertical long pump for liquid salts |
| CN108167195A (en) * | 2017-12-27 | 2018-06-15 | 中国科学院上海应用物理研究所 | A kind of superelevation temperature molten salt shaft seal pump |
| CN114087210A (en) * | 2021-11-26 | 2022-02-25 | 江苏飞跃机泵集团有限公司 | Molten salt pump complete equipment with pressure design in tank |
| CN114673688A (en) * | 2022-03-24 | 2022-06-28 | 江苏飞跃机泵集团有限公司 | Bent pipe water outlet base of long-shaft high-temperature molten salt cold salt pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3339491A (en) * | 1964-07-17 | 1967-09-05 | Worthington Simpson | Vertically mounted rotary pumps |
| CN201554686U (en) * | 2009-10-31 | 2010-08-18 | 邬国平 | Mechanical sealing device for marine pump |
| CN201615061U (en) * | 2010-02-24 | 2010-10-27 | 天津市华邦科技发展有限公司 | High-temperature molten salt axial-flow pump with anti-leakage device |
| CN202612195U (en) * | 2012-06-27 | 2012-12-19 | 烟台盛泉泵业有限公司 | Filler sealing mechanism of titanium tetrachloride pump |
| CN203023077U (en) * | 2012-09-25 | 2013-06-26 | 大连第六耐酸泵厂 | Safe efficient leakage-free cantilever type centrifugate discharging pump |
| 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 |
-
2013
- 2013-08-29 CN CN201310386182.6A patent/CN104421196A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3339491A (en) * | 1964-07-17 | 1967-09-05 | Worthington Simpson | Vertically mounted rotary pumps |
| CN201554686U (en) * | 2009-10-31 | 2010-08-18 | 邬国平 | Mechanical sealing device for marine pump |
| CN201615061U (en) * | 2010-02-24 | 2010-10-27 | 天津市华邦科技发展有限公司 | High-temperature molten salt axial-flow pump with anti-leakage device |
| CN202612195U (en) * | 2012-06-27 | 2012-12-19 | 烟台盛泉泵业有限公司 | Filler sealing mechanism of titanium tetrachloride pump |
| CN203023077U (en) * | 2012-09-25 | 2013-06-26 | 大连第六耐酸泵厂 | Safe efficient leakage-free cantilever type centrifugate discharging pump |
| 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 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990088A (en) * | 2015-06-18 | 2015-10-21 | 惠州东江威立雅环境服务有限公司 | Security monitoring and emergency processing system and method for burning material pit |
| CN108167195A (en) * | 2017-12-27 | 2018-06-15 | 中国科学院上海应用物理研究所 | A kind of superelevation temperature molten salt shaft seal pump |
| CN108087324A (en) * | 2017-12-28 | 2018-05-29 | 四川省自贡工业泵有限责任公司 | The spiral sealing device of vertical long pump for liquid salts |
| CN114087210A (en) * | 2021-11-26 | 2022-02-25 | 江苏飞跃机泵集团有限公司 | Molten salt pump complete equipment with pressure design in tank |
| CN114087210B (en) * | 2021-11-26 | 2023-12-19 | 江苏飞跃机泵集团有限公司 | Molten salt pump complete device with pressure design in tank |
| CN114673688A (en) * | 2022-03-24 | 2022-06-28 | 江苏飞跃机泵集团有限公司 | Bent pipe water outlet base of long-shaft high-temperature molten salt cold salt pump |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160627 Address after: Wujin Jiaze town 213146 area in Jiangsu city of Changzhou Province on village Taihe view of 4 Applicant after: Yin Su Address before: Wujin Jiaze town 213146 area in Jiangsu city of Changzhou province Hou Yu Jie Tai He Road No. 4 Applicant before: Changzhou Sunhome Solar Water Heater Manufacture Co., Ltd. |
|
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150318 |