CN106122083A - Pump for liquid salts combination type blade wheel - Google Patents
Pump for liquid salts combination type blade wheel Download PDFInfo
- Publication number
- CN106122083A CN106122083A CN201610737381.0A CN201610737381A CN106122083A CN 106122083 A CN106122083 A CN 106122083A CN 201610737381 A CN201610737381 A CN 201610737381A CN 106122083 A CN106122083 A CN 106122083A
- Authority
- CN
- China
- Prior art keywords
- end cap
- impeller bodies
- pump
- fixing
- impeller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
- F04D29/2227—Construction and assembly for special materials
-
- 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
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials 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
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals
Abstract
Disclosed by the invention is a kind of pump for liquid salts combination type blade wheel; fixing it is connected by impeller bodies and end cap are concentricity with its impeller; protective layer in impeller bodies and end cover surface its works fine secure; impeller bodies and end cap all use Austenitic stainless steel forging to be machined and are shaped to principal character; have rational in infrastructure; the features such as high temperature resistant, wear-resistant, antioxidation, anticorrosive and length in service life, provide equipment for solar light-heat power-generation and support.
Description
Technical field
The present invention relates to a kind of pump for liquid salts combination type blade wheel, particularly to a kind of fused salt being used for carrying heat conduction fused-salt medium
The impeller of pump, belongs to mechanical pump technical field.
Background technology
Pump for liquid salts of the present invention, is primarily referred to as in solar light-heat power-generation equipment, is used for carrying being stored in fused salt heat accumulation
Major axis pump for liquid salts under the liquid of fused salt in system high/low temperature storage tank.
Conventional this kind of pump for liquid salts, use temperature is typically below 400 DEG C, and the flow of its fused salt is also little, thus adopts
With usual precision manufactureing technique pump for liquid salts made in one piece, the demand of its actual motion i.e. can be met.
But, along with the fast development of solar light-heat power-generation cause, described pump for liquid salts not only demand increases, Er Qieqi
Temperature is used to reach 600 DEG C.High temperature, swiftly flowing fused salt liquid stream, will necessarily cause quickly infringement to the impeller of pump for liquid salts
Serious problems.
And the impeller of the pump for liquid salts of prior art instantly, it is all rustless steel single-casting goods.Due to described cast article
Not only be inevitably present shrinkage porosite, be mingled with and the casting flaws such as pore, and its organizational structure more be thick dendritic
Crystalline solid and columnar grain, tissue quality is the softest, thus described impeller casting goods, not only its mechanical and physical performance
Poor, and lack high temperature resistant, wear-resistant, antioxidation and the function such as anticorrosive, it is difficult to competent high temperature year in year out, at a high speed conveying
The work of medium fused salt.
In order to develop to solar energy, it is provided that first and then equip support reliably, the pump for liquid salts to prior art
Impeller, carries out having substantial improvement, and provides a kind of and can ensure that it is chronically at the pump for liquid salts of good working state, just
Become urgent expectation in the industry.
Summary of the invention
It is desirable to provide a kind of high temperature resistant, wear-resistant, antioxidation and erosion-resisting pump for liquid salts combination type blade wheel, with full
The demand of foot solar energy thermo-power station.
The present invention realizes the technical though of its purpose, and one is to replace original foundry goods with high-quality stainless steel forgings, with its from
Substantially promote the mechanical property of impeller, and the ability to work under the working environment of high temperature, high speed and severe corrosive；Two are
The structure of impeller is divided and is classified as impeller bodies and 2 products of end cap, and it is whole to constitute impeller by both concentricity fixing connections
System product, to facilitate the enforcement of manufacturing process；Three is the position contacted with fused salt with the every of end cap in impeller bodies, all
It is laid with the protective layer of film structure, ensures impeller long-term existence works fine under severe rugged environment with it；Four is impeller master
Body takes rustless steel to forge cake, and is cut into the process strategies processing of type through Multi-axis simultaneous machining center carving.By above 4 skills
The enforcement of art conception, thus realize the purpose of the present invention.
Conceiving based on techniques described above, the present invention realizes the technical scheme of its purpose and is:
A kind of pump for liquid salts combination type blade wheel, its innovative point is:
A, described impeller constituted by having vaned impeller bodies and the concentricity fixing connection of end cap one meet design want
The complete impeller asked；
B, described impeller bodies and end cap, both of which be rustless steel forging cake is machined and the manufactured goods of molding；
Under c, described impeller bodies and the end cap operating mode after both combine, every and its pumped (conveying) medium fused salt contact site
On surface, it is laid with the protective layer ensureing its long-term good working state.
Conceive based on the technology of the present invention, can clearly understand, present subject matter technical scheme, it is achieved that it to realize
Purpose.
In order to allow the present invention long-term in the environment of high temperature, high speed and high corrosion can be competent at its work, use rustless steel
As the forging cake raw material of impeller bodies and end cap, that is must do so.But, empirical tests of the present invention and analyze austenite
Cognition after the Chemical Physics performance of rustless steel OCr17Ni12Mo2N, owing to containing N in this described rustless steel, and improves strong
Degree, but do not reduce its plasticity, and there is the best corrosion resistance, thermostability and the hot-workability such as punching press, forging, without heat treatment
Hardening phenomenon.For this present invention preferred austenitic stainless steel OCr17Ni12Mo2N, forge cake for impeller bodies of the present invention and end cap
Material.But it is not limited thereto.
Because the flow velocity of medium fused salt is directly proportional to pump for liquid salts infringement speed, thus fused salt flow velocity must be controlled in safety
Within the scope of.
In order to prevent fused salt flow velocity from causing the corrosion-damaged of pump for liquid salts impeller, impeller has specially been made surface by the present invention
Reason, effectively to promote its self-protection function.
And the process of described surface, currently preferred: under impeller bodies with end cap operating mode, to contact fused salt position institute cloth
If protective layer be film structure layer, described film system protective layer initiates from impeller bodies and end cover surface, is the most successively
Surface rustless steel reconstruction of layer, TiN titanium nitride layer and Si3N4Silicon nitride layer.Wherein said surface reconstruction layer, is to have certain thickness
Degree high strength ionic bombardment layer, it not single pair of product body surfaces made highly effective disinfection (scale removal and
The foreign material such as greasy dirt), but also be effectively increased described body surfaces compactness and with the cohesiveness at rear coating.
And wherein Si3N4A kind of covalent compound pottery, be a kind of construction unit be [Si3N4] tetrahedron, i.e. silicon atom
It is positioned at tetrahedral center, has four nitrogen-atoms about, and lay respectively at tetrahedral four summits, then, with every three
Tetrahedron has the form of an atom, forms the firmest network structure at three dimensions.Described silicon nitride a lot
Excellent Chemical Physics performance all originates from this structure.Such as: its decomposition temperature is 1800 DEG C in atmosphere, due to its thermal expansion system
Number is low, and thermal conductivity is high, and its thermal shock resistance is splendid, has the highest intensity and impact resistance, its use temperature up to
To 1300 DEG C, and melt body will not be melt into after being heated, until 1900 DEG C just can be decomposed；Additionally Si3N4Also there is good self-lubricating
Performance, and use will not produce, 100-800 DEG C of temperature range, the expansion and contraction caused because of the temperature difference.
Based on Si3N4Chemical Physics performance as above, the present invention is preferably the surface layer of described protective layer, is reasonable
By, it is to seek the present invention to realize the correct selection of its purpose.But it is not limited thereto.
And described TiN titanium nitride layer, it is described impeller bodies and end cover surface reconstruction of layer and Si3N4Transition between outer layer
Articulamentum.By the transition of TiN titanium nitride layer, to make Si3N4Silicon nitride layer is together with surface reconstruction layer secure bond.
The present invention based on its serviceability and the consideration of cost performance, its most described surface rustless steel reconstruction of layer, be through
The atom activation layer of the dense structure of high energy ion beam bombardment, and the thickness of described TiN titanium nitride layer is in 1 ~ 3 μ m, institute
State Si3N4The thickness of silicon nitride layer is in 3 ~ 5 μ m.But it is not limited thereto.
The impeller bodies of the present invention is connected with the concentricity of end cap, it should be that impeller accurate forming final with it is with long-term the most just
Often work vital key problem in technology, and the intensity that both connect and the anti-leak problem of connecting portion, then it is in key
Crucial.The present invention is proved by repetition test, and advocates that described impeller bodies manufactured goods are concentricity with end cap manufactured goods solid
The fixed frame mode connected, is the one in following three kinds of attachment structure modes, or wherein said more than two kinds connect knot
The combination of structure mode:
The first attachment structure mode is that bolt is fixing to be connected；Described bolt is fixing to be connected, and is by least three stud
Be evenly arranged in described impeller 1/2 ~ 2/3 radius on the same circular arc line made, and respectively by 2 flat nuts to institute
State impeller bodies and end cap implements the seamless fixing connection to bolt；
The second attachment structure mode is that stake-fastening connects；Described stake-fastening connects, and is at described impeller 1/2 ~ 2/3 half
The blade position on same circular arc line made in the range of footpath, is laid riveted column respectively in axial direction, and is stood by riveted respectively
Described impeller bodies and end cap are implemented the fixing connection of seamless riveted by post via rivet；
The third attachment structure mode is that soldering is fixing to be connected；Described soldering is fixing to be connected, and is at described impeller bodies and end cap
Between both involutory surfaces, lay lamellar nickel-based solder and make brazing filler metal melts, the more condensed rear soldering formed by heating
Joint, implements the fixing of seamless soldering by described impeller bodies with end cap and is connected.
In concrete practice, it is desirable to be effectively improved impeller bodies and the machining accuracy of end cap joint surface, it is allowed to strictly accomplish
Fit together perfectly.If desired, at both involutory joint close positions, and can connect at bolt and under conditions of riveting, add pure copper foil
Pad, to be strictly on guard against that pump for liquid salts leaks.
In described three kinds of attachment structure forms, the present invention preferably uses the soldering of Ni-based hard weld tabs to connect.Pricker
During weldering, to be brazed welding impeller bodies and end cap attaching surface once purged, solder is arranged between both attaching faces,
After being heated to brazing filler metal melts temperature, brazing filler metal melts also infiltrates described weldment surface, and liquid solder is by capillarity, and edge
Attaching seam flowing is sprawled, and merges into each other, and interpenetrates, then forms alloy-layer, i.e. forms brazed joint after condensation, and
Impeller bodies is made to link together with end cap.
And described bolt fixing connection connects with stake-fastening, it shall be noted that the layout portion of its bolt and nut and rivet
Position, definitely can not interfere with other mechanical components, and described interference includes resting state and kinestate.
After technique scheme is implemented in full, it is rational in infrastructure that the present invention is had, high temperature resistant, wear-resistant, antioxygen
Change and excellent corrosion resistance, and the feature such as validity period limit for length, it is apparent from.
Accompanying drawing explanation
Fig. 1 is the schematic front view of the impeller bodies 1 of the present invention；
Fig. 2 is the sectional view of Fig. 1；
Fig. 3 is that the master of the end cap 2 of the present invention regards generalized section；
Fig. 4 is the assembling schematic diagram (soldering connection) of impeller of the present invention；
Fig. 5 is the film structure schematic diagram of protective layer 3；
Fig. 6 is that impeller bodies 1 fixes, with end cap 2 bolt, the structure partial generalized section being connected；
Fig. 7 is the structure partial generalized section that impeller bodies 1 is connected with end cap 2 stake-fastening.
Detailed description of the invention
Hereinafter compareing accompanying drawing, by the description of detailed description of the invention, the invention will be further described.
One of detailed description of the invention, as shown in accompanying drawing 1 ~ 6,
A kind of pump for liquid salts combination type blade wheel, its:
A, described impeller are made up of one and meet and set the concentricity fixing connection of both the impeller bodies 1 with blade 1-1 and end cap 2
The complete impeller that meter requires；
B, described impeller bodies 1 and end cap 2, both of which be rustless steel forging cake is machined and the manufactured goods of molding；
Under c, described impeller bodies 1 and end cap 2 operating mode after both combine, every and its pumped (conveying) medium fused salt contact site
Surface on, be laid with ensure its long-term good working state protective layer 3.
And described impeller bodies 1 and end cap 2 rustless steel forging cake, it is all the OCr17Ni12Mo2N Ovshinsky meeting technological requirement
Body rustless steel forging cake.
And described to contact, under impeller bodies 1 with end cap 2 operating mode, the protective layer 3 laid at fused salt position be film structure
Layer, described film system protective layer 3 initiates from impeller bodies 1 and end cap 2 surface, is surface rustless steel reconstruction of layer 3-the most successively
1, TiN titanium nitride layer 3-2 and Si3N4Silicon nitride layer 3-3.
And described surface rustless steel reconstruction of layer 3-1, it is the atom activation layer of the dense structure bombarded through high energy ion beam, and
The thickness of described TiN titanium nitride layer 3-2 in 1 ~ 3 μ m, described Si3N4The thickness of silicon nitride layer 3-3 is in 3 ~ 5 μ m.
And the described impeller bodies 1 manufactured goods fixing frame mode that be connected concentricity with end cap 2 manufactured goods, it is bolt
Fixing connection 4；Connection 4 fixed by described bolt, is to be evenly arranged in described impeller 1/2 ~ 2/ by least three stud 4-1
On the same circular arc line made in 3 radius and real to described impeller bodies 1 and end cap 2 by 2 flat nut 4-2 respectively
Execute the seamless fixing connection to bolt.
The two of detailed description of the invention, as shown in accompanying drawing 1 ~ 5 and 7,
A kind of pump for liquid salts combination type blade wheel, its described impeller bodies 1 frame mode of being connected fixing with both end caps 2, is riveted
Fixing connection 5；Described stake-fastening connects 5, is made on same circular arc line in described impeller 1/2 ~ 2/3 radius
Blade 1-1 position, lays riveted column 5-1 respectively in axial direction, and passes through riveted column 5-1 respectively via rivet 5-2 to described
Impeller bodies 1 and end cap 2 implement the fixing connection of seamless riveted.In addition, other is all such as one of detailed description of the invention.
The three of detailed description of the invention, as shown in accompanying drawing 1 ~ 5.
A kind of pump for liquid salts combination type blade wheel, its described impeller bodies 1 is concentricity with both end caps 2 fixing structure side being connected
Formula, is that connection 6 is fixed in soldering；Connection 6 is fixed in described soldering, be both described impeller bodies 1 and end cap 2 involutory surface it
Between, lay lamellar nickel-based solder 6-1 and make solder 6-1 melt by heating, the more condensed rear soldered fitting 6-2 formed,
With end cap 2, described impeller bodies 1 is implemented the fixing of seamless soldering be connected.In addition, other is all such as detailed description of the invention
One of.
Other detailed description of the invention, it is also possible to be the fixing connected mode of described impeller bodies 1 and end cap 2, be soldering
The fixing connected mode combined with bolt, or the fixing connected mode that soldering combines with riveted, or spiral shell
The fixing connected mode that bolt combines with riveted, or the fixing connected mode of soldering, bolt and riveted triplicity.
The experimental result of the pump for liquid salts combination type blade wheel first sample as described by embodiment of above shows, cold and hot at 500 times
Under cycling condition, i.e. work 7 hours, stop transport 1 hour, repeatedly run 500 times, do not find that impeller has any damage phenomenon.Test
Also in proceeding.Predicting according to expert, the present invention, than conventional cast moulding impeller, has significant Technological Economy effect
Benefit, thus realize its purpose to be realized.
Claims (5)
1. a pump for liquid salts combination type blade wheel, it is characterised in that:
A, described impeller are constituted one by the impeller bodies (1) with blade (1-1) and both concentricity fixing connections of end cap (2)
Meet the complete impeller that design requires；
B, described impeller bodies (1) and end cap (2), both of which be rustless steel forging cake is machined and the manufactured goods of molding；
Under c, described impeller bodies (1) and end cap (2) operating mode after both combine, every contact with its pumped (conveying) medium fused salt
On the surface at position, it is laid with the protective layer (3) ensureing its long-term good working state.
2. pump for liquid salts combination type blade wheel as claimed in claim 1, it is characterised in that: described impeller bodies (1) and end cap (2) are no
Rust steel forging cake, is all the OCr17Ni12Mo2N austenitic stainless steel forging cake meeting technological requirement.
3. pump for liquid salts combination type blade wheel as claimed in claim 1, it is characterised in that: described in impeller bodies (1) with end cap (2)
Contacting the protective layer (3) laid at fused salt position under operating mode is film structure layer, and described film system protective layer (3) is from impeller bodies
(1) with end cap (2) surface initiate, be surface rustless steel reconstruction of layer (3-1) the most successively, TiN titanium nitride layer (3-2) and
Si3N4Silicon nitride layer (3-3).
Pump for liquid salts combination type blade wheel the most according to claim 3, it is characterised in that: described surface rustless steel reconstruction of layer (3-
1), it is the atom activation layer of the dense structure bombarded through high energy ion beam, and the thickness of described TiN titanium nitride layer (3-2) is 1 ~ 3
In μ m, described Si3N4The thickness of silicon nitride layer (3-3) is in 3 ~ 5 μ m.
5. according to the pump for liquid salts combination type blade wheel one of claim 1-3 Suo Shu, it is characterised in that: described impeller bodies (1) is made
Finished product is concentricity with end cap (2) the manufactured goods fixing frame mode being connected, is in following three kinds of attachment structure modes
Kind, or the combination of wherein said more than two kinds attachment structure modes:
The first attachment structure mode is that bolt is fixing connects (4)；Described bolt is fixing connects (4), is double by least three
On the same circular arc line that hook bolt (4-1) is made in being evenly arranged in described impeller 1/2 ~ 2/3 radius, and respectively by 2
Described impeller bodies (1) and end cap (2) are implemented the seamless fixing connection to bolt by flat nut (4-2)；
The second attachment structure mode is that stake-fastening connects (5)；Described stake-fastening connects (5), is at described impeller 1/2
Made blade (1-1) position on same circular arc line in ~ 2/3 radius, laid riveted column (5-1) respectively in axial direction, and
Via rivet (5-2), described impeller bodies (1) and end cap (2) are implemented seamless riveted by riveted column (5-1) respectively to consolidate
Fixed connection；
The third attachment structure mode is that soldering is fixing connects (6)；Described soldering is fixing connects (6), is in described impeller bodies
(1) and between end cap (2) both involutory surfaces, lay lamellar nickel-based solder (6-1) and make solder (6-1) melt by heating,
The soldered fitting (6-2) formed after the most condensed, implements the fixing of seamless soldering by described impeller bodies (1) and end cap (2)
Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610737381.0A CN106122083B (en) | 2016-08-26 | 2016-08-26 | Pump for liquid salts combination type blade wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610737381.0A CN106122083B (en) | 2016-08-26 | 2016-08-26 | Pump for liquid salts combination type blade wheel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106122083A true CN106122083A (en) | 2016-11-16 |
| CN106122083B CN106122083B (en) | 2019-03-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610737381.0A Active CN106122083B (en) | 2016-08-26 | 2016-08-26 | Pump for liquid salts combination type blade wheel |
Country Status (1)
| Country | Link |
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| CN (1) | CN106122083B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5360318A (en) * | 1992-08-06 | 1994-11-01 | Hitachi Ltd. | Compressor for gas turbine and gas turbine |
| JP2003013882A (en) * | 2001-06-29 | 2003-01-15 | Daido Steel Co Ltd | High-temperature gas blowing fan |
| CN102990302A (en) * | 2012-11-30 | 2013-03-27 | 杭州杭氧透平机械有限公司 | Machining method of closed three-elemental impeller with small flow |
| CN103206384A (en) * | 2013-04-24 | 2013-07-17 | 欧技工业设备（江苏）有限公司 | High-temperature molten salt pump with composite heat-dissipation structure |
| CN104481887A (en) * | 2014-12-24 | 2015-04-01 | 江苏飞跃机泵集团有限公司 | Vertical type high-temperature long-axis molten salt pump |
| WO2015155119A1 (en) * | 2014-04-09 | 2015-10-15 | Nuovo Pignone Srl | Method of protecting a component of a turbomachine from liquid droplets erosion, component and turbomachine |
| CN206000779U (en) * | 2016-08-26 | 2017-03-08 | 常州索拉尔熔盐泵阀科技有限公司 | Pump for liquid salts combination type blade wheel |
-
2016
- 2016-08-26 CN CN201610737381.0A patent/CN106122083B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5360318A (en) * | 1992-08-06 | 1994-11-01 | Hitachi Ltd. | Compressor for gas turbine and gas turbine |
| JP2003013882A (en) * | 2001-06-29 | 2003-01-15 | Daido Steel Co Ltd | High-temperature gas blowing fan |
| CN102990302A (en) * | 2012-11-30 | 2013-03-27 | 杭州杭氧透平机械有限公司 | Machining method of closed three-elemental impeller with small flow |
| CN103206384A (en) * | 2013-04-24 | 2013-07-17 | 欧技工业设备（江苏）有限公司 | High-temperature molten salt pump with composite heat-dissipation structure |
| WO2015155119A1 (en) * | 2014-04-09 | 2015-10-15 | Nuovo Pignone Srl | Method of protecting a component of a turbomachine from liquid droplets erosion, component and turbomachine |
| CN104481887A (en) * | 2014-12-24 | 2015-04-01 | 江苏飞跃机泵集团有限公司 | Vertical type high-temperature long-axis molten salt pump |
| CN206000779U (en) * | 2016-08-26 | 2017-03-08 | 常州索拉尔熔盐泵阀科技有限公司 | Pump for liquid salts combination type blade wheel |
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| Publication number | Publication date |
|---|---|
| CN106122083B (en) | 2019-03-22 |
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| CB02 | Change of applicant information |
Address after: 213135 No. 1 Yinshan Road industrial cluster area, Xixia Town, Xinbei District, Changzhou, Jiangsu Applicant after: Changzhou solal molten salt pump valve technology Co Ltd Address before: 213000 A1103, 3, Chuang Kong port, Changzhou science and Education Town, 18 Wujin Road, Wujin, Changzhou. Applicant before: Changzhou solal molten salt pump valve technology Co Ltd |
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