CN203035531U - Heat shielding device of high-temperature medium pump - Google Patents
Heat shielding device of high-temperature medium pump Download PDFInfo
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- CN203035531U CN203035531U CN 201220656612 CN201220656612U CN203035531U CN 203035531 U CN203035531 U CN 203035531U CN 201220656612 CN201220656612 CN 201220656612 CN 201220656612 U CN201220656612 U CN 201220656612U CN 203035531 U CN203035531 U CN 203035531U
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- pump
- shield plug
- plug
- shield
- flange
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Abstract
The utility model provides a heat shielding device of a high-temperature medium pump. The heat shielding device of the high-temperature medium pump comprises a pump shaft, a pump tank, an upper flange and a shielding plug. The shielding plug is provided with a shielding plug flange which extends outward in the radial direction from a shielding plug main body. The upper wall surface of the shielding plug and the lower wall surface of the upper flange are matched in a sealing mode. The lower wall surface of the shielding plug is exposed to high-temperature fused salt in the pump tank. The pump tank is provided with a pump tank flange which extends outward in the radial direction, wherein the upper wall surface of the pump tank flange is matched with the lower wall surface of the shielding plug flange in a sealing mode, and a circumferential-direction cooling air channel is arranged in the pump tank flange. A series of radial annular air channels are formed in the shielding plug main body, wherein the annular air channels are spaced outward, and the whole cooling air path enables a connecting flange to maintain a lower temperature. The shielding device of the high-temperature medium pump can achieve that heat of a high-temperature medium in the pump tank is prevented from being conducted to a rotor and a support system which are arranged above the pump tank so as to guarantee that all components reliably work at an appropriate temperature in safety.
Description
Technical field
The utility model relates to a kind of high temperature media pump, particularly a kind of thermal shield apparatus of the high-temperature melting salt pump for MSR.Be applicable to the temperature control of bearing and the sealing flange of use high temperature media pump, can be widely used in the high temperature media pump in fields such as chemical industry high-temperature molten salt, non-ferrous metal metallurgy.
Background technique
The high temperature media pump is a kind of pump housing for delivery of high temperature media, the known industries such as metallurgy, petrochemical industry that are widely used in.By prior art as can be known, the mechanical property of the present employed material of high temperature media pump is at high temperature general unstable, simultaneously, all requiring could proper functioning under lower temperature environments for the key structure parts in the high temperature media pump (as various sealing configurations, spring bearing, lubricated etc.).In addition, material is easier being corroded at high temperature, and the working life of high temperature pump that is in the medium transport that is corrosive under the hot environment is shorter usually, is unfavorable for the safe operation of pump.Therefore, along with improving constantly of the temperature that is transferred medium, the cooling (or thermoscreen) of high temperature media pump is had higher requirement.
Chinese patent CN20213222U provides a kind of high temperature media pump seal jar cooling unit, comprises hermetically sealed can and jacket structured in this device, constitutes the cavity of depositing cooling water between hermetically sealed can and the chuck, realizes cooling by the cooling water in this cavity.But, the heat exchange area of this chuck cooling system is subject to the outer surface of hermetically sealed can, the cooling requirement of the temperature that only can satisfy sealing fluid (high temperature media) below 400 ℃ the time, medium for higher temperature can't effectively cool off, force the temperature of the assemblies such as mechanical seal of hermetically sealed can top constantly to raise, thereby cause this high temperature media pump to lose efficacy.
Certainly, also exist various high temperature media pumps in the prior art, as warm water pump, high temperature oil pump, high-temperature melting salt pump etc., but all without exception, only can satisfy the cooling requirement of working medium temperature normal and continuous operation under (maximum 540 ℃) below 500 ℃ operating mode.
Wherein, high-temperature melting salt pump is the most common.Existing pump for liquid salts adopts nitrate as medium usually, and running temperature is below 540 ℃, and corresponding thermal shield apparatus is used for reference the cooling system of the high temperature media pump of petrochemical industry usually.Thermoscreen for the pump for liquid salts of the working medium of higher running temperature does not also provide relevant solution in the prior art.
The fused salt loop of MSR comprises fuel salt circulation (loop), cooling salt circulation (secondary circuit) and power generation circuit (three loops).Temperature of molten salt is more high, and then three loop heat exchange efficiencys are more high.Obviously, if can adopt the fluoride salt of running temperature between 550 ℃-700 ℃ as the working medium of high-temperature melting salt pump, the rate of heat exchange of power generation circuit will significantly improve, and have remarkable advantages.But the cooling requirement of the cooling system of the pump high-temperature melting salt pump that all can't to satisfy with 700 ℃ of fluoride salts be working medium in the prior art makes unit, sealing and the support system long term maintenance stable operation in suitable temperature range of pump jar top.
The model utility content
Technical problem to be solved in the utility model provides a kind of high temperature media pump thermal shield apparatus, conducts to pump assembly, bearings and seal arrangement thereby solve the heat that can't effectively shield high temperature media in the prior art, thus the problem that causes pump to lose efficacy.
The utility model provides a kind of high temperature media pump thermal shield apparatus, comprising: pump shaft, pump jar and shield plug, and wherein, this pump shaft extends in the pump jar along a central shaft, and this upper flange arranges around this pump shaft; The upper wall surface of described shield plug and the lower wall surface of described upper flange are sealed and matched, and the lower wall surface of described shield plug directly is exposed in the interior high-temperature molten salt of pump jar; Described shield plug has the shield plug flange that extends radially outwardly out from its main body, and described pump jar has the pump pot process orchid that extends radially outwardly out, and the upper wall surface of described pump pot process orchid and the lower wall surface of described shield plug flange are sealed and matched; Be provided with the shield plug cooling air passage that radially runs through in the described shield plug flange; The main body of described shield plug also has the isolated annular air channel of a series of radially outwards.Described annular air channel is communicated with described shield plug cooling air channel gas, thereby provides the air cooling passage for shield plug top cooling air.The utility model is taken away near the heat the main body by the cooling air that flows through in this air flue and then shield plug and flange thereof is effectively cooled off; Simultaneously, because thermal radiation and heat conducting effect, and then the temperature of coolant pump pot process orchid, make the temperature maintenance of pump pot process orchid and shield plug flanged surface a suitable temperature, thereby guarantee to be tightly connected reliably between shield plug and the pump jar.
The opening direction of two adjacent annular air channels is 180 ° of interlaced arrangement each other.So the annular air channel that arranges has prolonged the extended length of annular air channel to greatest extent, thereby prolongs the waiting time of cooling air in shield plug, improves its heat exchange efficiency.
Has first gap diametrically between the axle collar face of the internal face of described shield plug and described pump shaft, described upper flange has the sweep gas entrance that radially runs through, described pump jar is provided with the sweep gas outlet, described sweep gas entrance is communicated with the described first gap gas, thereby provides shield plug internal face air cooling passage for sweep gas.The utility model can prevent effectively that by this shield plug internal face air cooling passage the high-temperature molten salt gas in the pump jar from upwards escaping by first gap, simultaneously block internal face and pump shaft of cooling screen.Should be appreciated that, also can cool off pump shaft effectively by adjusting the above-mentioned shield plug top annular air cooling passage of mentioning, for example prolong extending axially length and the position being set and annular pass number etc. of annular air channel, at this shield plug top annular air cooling passage and shield plug internal face air cooling passage are carried out combination and provided preferred thermoscreen scheme.
Has second gap between the internal face of the outer wall of described shield plug and described pump jar diametrically, described shield plug has the air flue that radially extends substantially below described annular air channel, this air flue is communicated with described first gap and described second gap, described sweep gas entrance, described first gap, described air flue and described second gap gas successively are communicated with, thereby provide shield plug outer wall air cooling passage for sweep gas.The utility model can prevent effectively that by this shield plug outer wall air cooling passage the high-temperature molten salt gas in the pump jar from upwards escaping by second gap, simultaneously block outer wall and pump jar of cooling screen.In addition, this shield plug outer wall air cooling passage forms together dynamically heat shield between shield plug outer wall and pump jar internal face, has avoided both directly to come in contact and the heat of pump jar is directly passed to shield plug.
The internal face of described shield plug has a series of annular labyrinth seal tooth that extends radially inwardly, thereby forms labyrinth structure with described pump shaft.This labyrinth structure can stop upwards escaping of high-temperature molten salt better with the sweep gas in first gap, thereby realizes zero leakage.
Described shield plug also comprises the heat-insulation chamber for the conduction of the heat between the top and the bottom of shielding plug.This heat-insulation chamber is depicted as the below that is positioned at air flue, this heat-insulation chamber the length that extends axially that can prolong shield plug is set, make shield plug have the heat gradient of sufficient length in the axial direction, thereby reduce the structurally internal stress that heat gradient causes.
Described shield plug also comprises the outlet passageway that is communicated with described heat-insulation chamber and described pump jar.This outlet passageway is used as the outlet of gas when expanded by heating in the described heat-insulation chamber, thereby prevents that the interior gas of heat-insulation chamber from causing the structurally internal stress of shield plug owing to expanded by heating.
Be provided with the blue cooling air passage of the pump pot process that radially runs through in the described pump pot process orchid, described pump jar also has annular air cooling passage, and described annular air cooling passage is communicated with the blue cooling air channel gas of described pump pot process, thereby provides pump pot process orchid air cooling passage for cooling air.By the blue air cooling passage of this pump pot process blue and stacked thereon shield plug flange of coolant pump pot process better, thereby guarantee reliable sealing between pump jar and the shield plug.
Pass through technique scheme, the heat that high temperature media pump thermal shield apparatus provided by the utility model can intercept the high temperature media in the pump jar effectively waits to the assembly (for example rotor, support system) of pump jar top and conducts, thereby the sealing of assurance high temperature media pump waits each assembly to work safely and reliably under suitable temperature.Even when the working medium in the high-temperature melting salt pump is 550 ℃-700 ℃ fluoride salt, high temperature media pump thermal shield apparatus provided by the utility model also can be guaranteed the long-term safety operation of pump assembly.The problem of thermoscreen of the high temperature media pump of the working medium that the specified structure of above-mentioned various air cooling passages (for example shield plug top annular air cooling passage, shield plug internal face air cooling passage, shield plug outer wall air cooling passage and the blue air cooling passage of pump pot process) and heat-insulation chamber, the utility model be expected to solve higher temperature is provided in conjunction with the utility model.
Description of drawings
Fig. 1 is the structural representation according to high temperature media pump thermal shield apparatus of the present utility model;
Fig. 2 is the schematic representation according to the annular air channel of high temperature media pump thermal shield apparatus of the present utility model;
Fig. 3 is the schematic representation according to the blue air cooling passage of pump pot process of high temperature media pump thermal shield apparatus of the present utility model.
Wherein:
1, pump shaft 11 axle collar faces
2, pump jar 21 pump pot process orchids
22 annular air cooling passages
23 pump jar internal faces
The blue cooling air passage of 24 pump pot processes
The blue cooling air entrance of 24a pump pot process
The blue cooling air outlet of 24b pump pot process
The blue upper wall surface of 25 pump pot processes
3, upper flange 31 sweep gas entrances
32 upper flange lower wall surfaces
4, the worn-out plug of screen 41 labyrinth structures
42 heat-insulation chambers
The 42a outlet passageway
43 air flues
44 annular air channels
45 shield plug cooling air passages
45a shield plug cooling air entrance
The outlet of 45b shield plug cooling air
The worn-out plug of 46 screens internal face
47 shield our wall beyond the Great Wall
48 shield our wall beyond the Great Wall
The worn-out plug of 49 screens lower wall surface
The worn-out plug of 50 screens flange
The worn-out plug of 51 screens flange lower wall surface
52 shield plug main bodys.
Embodiment
Below in conjunction with accompanying drawing, provide preferred embodiment of the present utility model, and be described in detail, enable to understand better function, the characteristics of high temperature media pump thermal shield apparatus of the present utility model.
As shown in Figure 1, comprise pump shaft 1, pump jar 2, upper flange 3 and shield plug 4 according to high temperature media pump thermal shield apparatus of the present utility model, wherein, this pump shaft 1 extends in the pump jar 2 along the central shaft (not shown), upper flange 3 arranges around pump shaft 1 in the outer peripheral of pump jar, shield plug 4 extends around pump shaft 1 near the opening of pump jar, the upper wall surface 48 of this shield plug 4 is sealed and matched with the lower wall surface 32 of upper flange 3, and the lower wall surface 49 of shield plug 4 stretches in the pump jar 2 and directly is exposed in the high-temperature molten salt in the pump jar.
As can be seen from Figure 1, pump jar 2 has the pump pot process orchid 21 that extends radially outwardly, shield plug 4 correspondingly has the shield plug flange 50 that extends radially outwardly from main body 52, this shield plug flange 50 is stacked and placed on the pump pot process orchid 21 and closely cooperates, the upper wall surface 25 that is pump pot process orchid 21 is sealed and matched with shield plug flange lower wall surface 51, thereby prevents the face leakage that the gas in the pump jar contacts along both.
The top of the main body 52 of shield plug 4 is provided with a series of annular air channels 44, for example be shown in Figure 2 for three annular air channel 44a, 44b, 44c, these three annular air channels 44 successively radially outward at interval, and the opening direction of adjacent annular air channel 44 is 180 ° of interlaced arrangement each other, for example is shown in Figure 2 for the opening of the first annular air channel 44a straight up, the opening of the second annular air channel 44b straight down, the opening of the 3rd annular air channel 44c is straight up.Correspondingly, have the shield plug cooling air passage 45 that radially runs through in the shield plug flange 50, thereby export 45b for cooling air provides shield plug cooling air entrance 45a and shield plug cooling air.So, the first annular air channel 44a that is positioned at innermost ring links to each other (referring to Fig. 1) with shield plug cooling air entrance 45a, the 3rd annular air channel 44c that is positioned at outer shroud link to each other with shield plug cooling air outlet 45b (referring to Fig. 1).Thus, cooling air enters the first annular air channel 44a successively by shield plug cooling air entrance 45a, the second annular air channel 44b and the 3rd annular air channel 44c, and finally flow out by shield plug cooling air outlet 45b.Through analogue simulation, the claimant finds that by annular air channel 44, heat and then cooling screen that cooling air is taken away near the main body 52 block 4; By shield plug cooling air passage 45, cooling air is taken away near the shield plug flange 50 heat and then cooling screen block flange 50 and the pump pot process orchid 21 that contacts with it, thereby guarantees being tightly connected between shield plug 4 and the pump jar 2.
According to a preferred embodiment of the present utility model, in the radial direction, have first gap between the internal face 46 of this shield plug 4 and the axle collar face 11 of pump shaft 1, have second gap between the outer wall 47 of this shield plug 4 and the internal face 23 of pump jar 2.This shield plug 4 has at least one air flue 43 that radially extends substantially, and this air flue is communicated with first gap and second gap, extends below annular air channel 44.Correspondingly, upper flange 3 has the sweep gas entrance 31 that radially runs through, and pump jar 2 is provided with sweep gas outlet (not shown).This sweep gas entrance 31 directly links to each other with first gap.After sweep gas entered first gap, a part of gas entered pump jar 2 inside downwards along internal face 46, flowed out by the sweep gas outlet then, and this gas passageway is also referred to as shield plug internal face air cooling passage; Another part gas enters second gap by air flue 43, enters pump jar 2 inside along outer wall 47 then, flows out by the sweep gas outlet at last, and this gas is by being also referred to as shield plug outer wall air cooling passage.The utility model prevents that by shield plug internal face air cooling passage the high-temperature molten salt gas in the pump jar from passing through the upwards escape of first gap, cooled inner wall face 23 and pump shaft 1 simultaneously.Should be appreciated that, can be formed with labyrinth mechanism 41 between shield plug 4 and the pump shaft 1, thereby stop the escape of high-temperature molten salt gas with sweep gas, realize zero leakage.This labyrinth structure 41 can be any existing labyrinth structure that can realize above-mentioned functions, also can be the disclosed a series of annular labyrinth seal tooth that extends radially inwardly from the internal face of shield plug of patent application CN201220581425.2, the content of this patent application is whole the merging therewith by reference.The utility model prevents that by shield plug outer wall air cooling passage the high-temperature molten salt gas in the pump jar from passing through the upwards escape of second gap, cools off outer wall 47 simultaneously.In addition, this shield plug outer wall air cooling passage forms together dynamically heat shield between shield plug outer wall 47 and pump jar internal face 23, avoid both directly contacts and a large amount of heat of pump jar 2 is directly reached shield plug 4, made the high temperature media pump provided by the utility model to play the effect of better thermoscreen.
According to another preferred embodiment of the present utility model, shield plug 4 has heat-insulation chamber 42, this heat-insulation chamber 42 is positioned at the below of air flue 43, be used for prolonging the axial length of shield plug 4, make shield plug 4 have enough heat gradients, thereby reduce the structurally internal stress of the shield plug material that heat gradient causes, finally reduce the requirement of strength to the shield plug material.On the other hand, this heat-insulation chamber 42 conduction of the heat between the top and the bottom of shielding plug 4 well.Preferably, shield plug 4 has at least one outlet passageway 42a, and this outlet passageway 42a directly is communicated with heat-insulation chamber 42 with second gap (or pump jar), is mainly used in preventing that the interior gas of heat-insulation chamber is owing to expanded by heating causes structurally internal stress.
According to another preferred embodiment of the present utility model, the root of pump jar 2 is provided with annular air cooling passage 22, correspondingly, pump pot process orchid 21 has the blue cooling air passage 24 of the pump pot process that radially runs through, thereby exports 24b for annular air cooling passage 22 provides the blue cooling air entrance 24a of pump pot process and the blue cooling air of pump pot process.Cooling air enters annular air cooling passage 22 by the blue cooling air entrance of pump pot process 24a, flows out by the blue cooling air outlet of pump pot process 24b then.
Above-described, be preferred embodiment of the present utility model only, be not in order to limit scope of the present utility model.Every simple, equivalence of doing according to claims and the description of the utility model application changes and modifies, and all falls into the claim protection domain of the utility model patent.The utility model not detailed description be the routine techniques content.
Claims (8)
1. high temperature media pump thermal shield apparatus comprises: pump shaft (1), pump jar (2) and upper flange (3), and wherein, this pump shaft (1) extends in the pump jar (2) along a central shaft, and this upper flange (3) arranges around this pump shaft (1); It is characterized in that, this high temperature media pump thermal shield apparatus also comprises shield plug (4), the upper wall surface (48) of described shield plug (4) is sealed and matched with the lower wall surface (32) of described upper flange (3), and the lower wall surface (49) of described shield plug (4) directly is exposed in the interior high-temperature molten salt of pump jar (2); Described shield plug (4) has the shield plug flange (50) that extends radially outwardly out from its main body, described pump jar (2) has the pump pot process orchid (21) that extends radially outwardly out, and the upper wall surface (25) of described pump pot process orchid (21) is sealed and matched with the lower wall surface (51) of described shield plug flange; Be provided with the shield plug cooling air passage (45) that radially runs through in the described shield plug flange (50); The main body of described shield plug also has the isolated annular air channel of a series of radially outwards (44), and described annular air channel (44) is communicated with described shield plug cooling air passage (45) gas, thereby provides shield plug top annular air cooling passage for cooling air.
2. high temperature media pump thermal shield apparatus as claimed in claim 1 is characterized in that, the opening direction of adjacent two annular air channels (44) is 180 ° of interlaced arrangement each other.
3. high temperature media pump thermal shield apparatus as claimed in claim 1, it is characterized in that, has first gap diametrically between the internal face (46) of described shield plug (4) and the axle collar face (11) of described pump shaft (1), described upper flange (3) has the sweep gas entrance (31) that radially runs through, described pump jar (2) is provided with the sweep gas outlet, described sweep gas entrance (31) is communicated with the described first gap gas, thereby provides shield plug internal face air cooling passage for sweep gas.
4. high temperature media pump thermal shield apparatus as claimed in claim 3, it is characterized in that, has second gap diametrically between the outer wall (47) of described shield plug (4) and the internal face (23) of described pump jar (2), described shield plug (4) has the air flue (43) that radially extends substantially in the below of described annular air channel (44), this air flue (43) is communicated with described first gap and described second gap, described sweep gas entrance (31), described first gap, described air flue (43) and described second gap gas successively are communicated with, thereby provide shield plug outer wall air cooling passage for sweep gas.
5. high temperature media pump thermal shield apparatus as claimed in claim 3, it is characterized in that, the internal face (46) of described shield plug (4) has a series of annular labyrinth seal tooth that extends radially inwardly, thereby forms labyrinth structure (41) with described pump shaft (1).
6. high temperature media pump thermal shield apparatus as claimed in claim 1 is characterized in that, described shield plug (4) also comprises the heat-insulation chamber (42) for the conduction of the heat between the top and the bottom of shielding plug.
7. high temperature media pump thermal shield apparatus as claimed in claim 6 is characterized in that, described shield plug (4) also comprises the outlet passageway (42a) that is communicated with described heat-insulation chamber and described pump jar.
8. high temperature media pump thermal shield apparatus as claimed in claim 1, it is characterized in that, described pump jar (2) has the pump pot process orchid (21) that radially stretches out, be provided with the blue cooling air passage (23) of the pump pot process that radially runs through in this pump pot process orchid (21), described pump jar (2) also has annular air cooling passage (22), described annular air cooling passage (22) is communicated with blue cooling air passage (23) gas of described pump pot process, thereby provides pump pot process orchid air cooling passage for cooling air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220656612 CN203035531U (en) | 2012-12-03 | 2012-12-03 | Heat shielding device of high-temperature medium pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220656612 CN203035531U (en) | 2012-12-03 | 2012-12-03 | Heat shielding device of high-temperature medium pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203035531U true CN203035531U (en) | 2013-07-03 |
Family
ID=48687661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220656612 Withdrawn - After Issue CN203035531U (en) | 2012-12-03 | 2012-12-03 | Heat shielding device of high-temperature medium pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203035531U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937090A (en) * | 2012-12-03 | 2013-02-20 | 中国科学院上海应用物理研究所 | Thermal shielding device of high-temperature medium pump |
| CN108626175A (en) * | 2018-03-06 | 2018-10-09 | 江苏大学 | A kind of double heat-insulated heat shield systems for high-temperature pump |
-
2012
- 2012-12-03 CN CN 201220656612 patent/CN203035531U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937090A (en) * | 2012-12-03 | 2013-02-20 | 中国科学院上海应用物理研究所 | Thermal shielding device of high-temperature medium pump |
| CN102937090B (en) * | 2012-12-03 | 2015-04-08 | 中国科学院上海应用物理研究所 | Thermal shielding device of high-temperature medium pump |
| CN108626175A (en) * | 2018-03-06 | 2018-10-09 | 江苏大学 | A kind of double heat-insulated heat shield systems for high-temperature pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130703 Effective date of abandoning: 20150408 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130703 Effective date of abandoning: 20150408 |
|
| RGAV | Abandon patent right to avoid regrant |