CN212407115U - Ceramic impeller and ceramic impeller fixing device - Google Patents
Ceramic impeller and ceramic impeller fixing device Download PDFInfo
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- CN212407115U CN212407115U CN202021810216.1U CN202021810216U CN212407115U CN 212407115 U CN212407115 U CN 212407115U CN 202021810216 U CN202021810216 U CN 202021810216U CN 212407115 U CN212407115 U CN 212407115U
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- impeller
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Abstract
The utility model relates to a ceramic impeller, this ceramic impeller include metal framework and with vacuum casting mode shaping with ceramic layer on the metal framework, metal framework includes front shroud, back shroud to and set up the blade between front shroud and back shroud, arranged the through-hole in metal framework's front shroud, back shroud and blade respectively, the through-hole is used for the fixing ceramic impeller's ceramic layer, wherein, still have at least one in strengthening rib, concave and the recess on metal framework's front shroud or the back shroud, in order to be used for the fixing poured in ceramic layer on the metal framework. The utility model discloses still relate to a pottery impeller fixing device for fix pottery impeller on the impeller shaft.
Description
Technical Field
The utility model relates to a ceramic impeller especially relates to a ceramic impeller for carrying interior stereoplasm granule of power plant, corrosive fluids. The utility model discloses still relate to a ceramic impeller fixing device.
Background
In the flue gas desulfurization process of a power plant, a medium needing to be pumped contains hard particles and high-corrosiveness components, so that the requirement on the material of a pump is high, and the existing materials are applied as follows:
first, a metal material, duplex stainless steel or super duplex stainless steel must be used. Duplex stainless steel or super duplex stainless steel has the disadvantage of very high cost, and in addition, the wear and corrosion resistance of stainless steel materials still fall far behind that of ceramic materials.
Secondly, ordinary metal can be used, but a layer of rubber is needed to be coated on the place contacting with the medium, and the scheme of using metal and lining rubber has the defects that the service life of the lining rubber layer is not long and the lining rubber layer is easy to peel off.
Moreover, with the gradual increase of national requirements on environmental protection, ceramic pumps are gradually required to replace metal pumps. The core component of a ceramic pump is the impeller, since the impeller is the moving component, which has higher requirements on wear resistance and corrosion resistance.
Although the ceramic pump is a good direction, most of impellers of the ceramic pumps on the market have the problems of weak combination of metal and ceramic, unchanged disassembly, insufficient strength of ceramic blades and the like.
In a chinese utility model patent document entitled "composite ceramic impeller containing metal skeleton" with publication number "CN 210196121U, a ceramic composite impeller is disclosed, which improves the overall strength of the impeller, but in the metal skeleton, only the punching plate is used as the blade and the back cover plate, the structure of the metal skeleton is not further optimized, and the problem of weak bonding between the metal skeleton and the ceramic still exists.
Accordingly, it is desirable to provide a ceramic impeller suitable for pumping a fluid containing hard particles and corrosive fluid in a power plant, to solve the problems of weak bonding between ceramic and metal, insufficient strength of the ceramic impeller during operation, easy damage to the ceramic during disassembly and maintenance, and the like, and to further improve the pumping efficiency of the ceramic impeller.
Disclosure of Invention
In order to solve the technical problem, the utility model provides an at first, this ceramic impeller include metal framework and with vacuum pouring mode shaping with ceramic layer on the metal framework, metal framework includes front shroud, back shroud to and set up the blade between front shroud and back shroud the through-hole has been arranged respectively in metal framework's front shroud, back shroud and the blade, the through-hole is used for the fixing ceramic impeller's ceramic layer, wherein, metal framework's front shroud distolateral recess has, perhaps the back shroud dorsal part has the strengthening rib, perhaps the back shroud periphery has the concave vacancy for the fixing poured in ceramic layer on the metal framework.
The ceramic passes through the through hole during pouring, and the ceramic layer can be effectively fixed on the metal framework. The ribs are generally radial and provide rotational thrust to the ceramic layer as the blade rotates. The notches are positioned on the peripheries of the front cover plate and the rear cover plate of the metal framework, and the purpose is to establish the stop relation between the ceramic layer and the metal framework in the rotating direction. The recesses are usually arranged on the front and rear cover plate end faces, so that the ceramic layer can be embedded in the metal skeleton on the end faces. The reinforcing ribs, the notches and the grooves on the metal framework are embedded into the ceramic layer after ceramic is poured, and the ceramic layer and the metal framework can be firmly connected in the rotation process of the ceramic layer along with the metal framework.
In a preferred embodiment of the ceramic impeller according to the invention, the wall thickness of the metal skeleton and the position of the through-hole and the shape and position of the reinforcement, recess and recess are determined by a three-dimensional modeling simulation calculation analysis, in order to ensure that the ceramic impeller always meets the strength and stress requirements when operating in a pump mode. Compared with the blade designed by only adopting the uniformly distributed pore plates, the metal framework determined by the simulation calculation analysis of the three-dimensional shape better meets the requirements on strength and stress.
In a preferred embodiment of the ceramic impeller according to the invention, a structure suitable for pumping a fluid is provided on the outer surface of the ceramic layer on the metal skeleton back cover plate of the ceramic impeller. Preferably, the structure adapted to pump fluid is a raised back lobe or a depression. Only protruding back blades, only recesses recessed in the direction of the blades and the front cover plate, or both protruding back blades and recesses may be disposed on the outer surface of the ceramic layer on the metal skeleton rear cover plate of the ceramic impeller. These lobes or depressions serve to create a fluid pumping effect between the back cover plate and the mounting housing, preventing fluid from being trapped in this space.
In a preferred embodiment of the ceramic impeller according to the invention, the metal skeleton of the ceramic impeller has a metal region in the region of the hub front end, which is not covered by a ceramic layer, and which has a plurality of threaded holes suitable for screw connections. Since in this embodiment the screw connection is made between metal and metal, screw connections on the relatively brittle ceramic layer are avoided, and damage to the ceramic layer is prevented.
According to the utility model discloses an on the other hand still provides a ceramic impeller fixing device for fix ceramic impeller on the impeller shaft, ceramic impeller's metal framework has the metal area that is not covered by the ceramic layer in wheel hub front end region, and this ceramic impeller fixing device includes: the impeller fixing plate is suitable for being connected with threaded holes uniformly arranged on the metal area through a plurality of fastening bolts; an impeller cap connected to an impeller shaft of the ceramic impeller by means of a central connection bolt passing through the impeller fixing plate; wherein the impeller cap circumferentially surrounds the impeller fixing plate and axially abuts against the metal region with a gap from the ceramic layer of the ceramic impeller.
Preferably, the impeller cap and the central connecting bolt are constructed as an integral component. Alternatively, the central connecting screw can also be designed as a separate component, and a threaded bore can be provided on the side of the impeller cap facing the central connecting screw, which is adapted to the central connecting screw, so that a threaded connection is likewise possible between the impeller cap, the central connecting screw and the impeller shaft.
It should be noted that in the above-described ceramic impeller fixing device, the bolt connection is achieved as well as the impeller fixing plate when the center connection bolt passes through the impeller fixing plate.
Drawings
Fig. 1 illustrates in cross-section the metal skeleton of a ceramic impeller of the present invention;
fig. 2A and 2B illustrate through holes in a metal skeleton of a ceramic impeller of the present invention;
FIG. 3 illustrates the dimples and the back leaves of the ceramic impeller of the present invention;
fig. 4 illustrates in cross-section the ceramic layer of the ceramic impeller of the present invention;
fig. 5 shows an assembled state of the ceramic impeller fixing device of the present invention in a sectional view;
fig. 6 shows the disassembly process of the ceramic impeller of the invention in a sectional view.
Detailed Description
The ceramic impeller provided by the present invention is described in detail below with reference to the accompanying drawings, and the drawings and examples are not to be construed as limiting the invention.
Fig. 1 illustrates the metal skeleton of the ceramic impeller provided by the present invention, as shown in fig. 1, the metal skeleton 100 of the ceramic impeller provided by the present invention includes a front cover plate 110, a back cover plate 130, and a blade 120 disposed between the front cover plate 110 and the back cover plate 130.
The ceramic layer is formed on the metal framework 100 in a vacuum casting mode, and the ceramic impeller of the utility model is formed.
The front cover plate 110 of the metal frame 100 is provided with a groove 500 at its end for holding the ceramic layer cast on the metal frame, the groove is usually arranged on the front and rear cover plate end faces to enable the ceramic layer to be embedded into the metal frame on the end faces.
Fig. 2A and 2B illustrate the through holes in the metal frame of the ceramic impeller provided in the present invention, and as shown in fig. 2A and 2B, the through holes 210 are provided in the front cover plate of the metal frame, the through holes 230 are provided in the rear cover plate of the metal frame, and the through holes 220 are provided in the blades of the metal frame, and these through holes are all used for holding the ceramic layer of the ceramic impeller.
The ceramic passes through the through hole during pouring, and the ceramic layer can be effectively fixed on the metal framework.
The back side of the back cover plate of the metal framework is provided with a reinforcing rib 400, the reinforcing rib 400 is provided with a through hole 240, the periphery of the back cover plate of the metal framework is provided with a notch 300, and the above characteristics are all arranged to fixedly hold a ceramic layer poured on the metal framework.
The ribs 400 are generally radial and provide rotational thrust to the ceramic layer as the blade rotates.
The notches 300 are located at the periphery of the front and rear cover plates of the metal frame, and also aim to establish a stopping relationship between the ceramic layer and the metal frame in the rotation direction.
The reinforcing ribs 400, the notches 300 and the grooves on the metal framework are embedded into the ceramic layer after ceramic is poured, and the ceramic layer can be firmly connected with the metal framework in the rotation process of the ceramic layer along with the metal framework.
As shown in fig. 2A, a metal frame of a ceramic impeller is provided with a metal region not covered with a ceramic layer in an impeller hub region, and a bolt connection hole 950 is provided in the metal region for bolt connection with an impeller shaft to which the ceramic impeller is mounted.
Because the bolted connection is realized between metal and metal, avoided carrying out bolted connection on the ceramic layer that is relatively fragile, prevented the damage of ceramic layer.
Fig. 3 illustrates the depressions and the back leaves of the ceramic impeller provided by the present invention, and as shown in fig. 3, the ceramic layer on the metal skeleton back cover plate of the ceramic impeller is provided with protruding back leaves 800 and depressions 700 suitable for pumping fluid.
Only the protruding back vane, only the concave part concave to the direction of the blade and the front cover plate, or the concave part can be arranged on the outer surface of the ceramic layer on the metal framework rear cover plate of the ceramic impeller.
These lobes or depressions serve to create a fluid pumping effect between the back cover plate and the mounting housing, preventing fluid from being trapped in this space.
Fig. 4 illustrates the ceramic layer of the ceramic impeller provided by the present invention, as shown in fig. 4, the ceramic layer is formed on the metal framework 100 in a vacuum casting manner, including the ceramic layer 610 on the back cover plate of the metal framework, the ceramic layer 620 on the front cover plate of the metal framework, and the ceramic layer 630 on the blade of the metal framework.
Fig. 5 shows the assembly state of the ceramic impeller fixing device of the present invention in a cross-sectional view, as shown in fig. 5, the ceramic impeller fixing device is used for fixing the ceramic impeller on the impeller shaft 960, and the ceramic impeller fixing device includes: the impeller fixing plate 910 is connected to the metal framework 100 of the ceramic impeller through a plurality of fastening bolts, and the fastening bolts are screwed into threaded holes uniformly arranged on the metal area which is not covered by the ceramic layer in the front end area of the hub of the metal framework 100; an impeller cap 920, the impeller cap 920 being coupled to an impeller shaft 960 of the ceramic impeller by means of a central coupling bolt 930 passing through the impeller fixing plate 910.
Wherein the impeller cap 920 circumferentially surrounds the impeller fixing plate 910 and axially abuts against the metal region of the metal skeleton 100 with a gap H from the ceramic layer of the ceramic impeller.
The center connection bolt 930 is also connected to the impeller fixing plate 910 by a bolt.
Fig. 6 shows a disassembly process of the ceramic impeller of the present invention in a sectional view, as shown in fig. 6, when the ceramic impeller is disassembled,
first, the impeller cap is unscrewed, the center connection bolt is unscrewed from the impeller shaft 960, and a number of fastening bolts are loosened to detach the impeller fixing plate 910 from the hub region of the metal skeleton 100 of the ceramic impeller.
Then, the threaded rod of the impeller assembly and disassembly tool 940 is screwed through the impeller fixing plate 910, the top pressure head of the impeller assembly and disassembly tool 940 is installed at one end of the impeller assembly and disassembly tool 940 facing the impeller shaft 960, and then the impeller fixing plate 910 is fastened on the hub area of the metal framework 100 of the ceramic impeller by the fastening bolt again.
Finally, the threaded rod of the impeller dismounting tool 940 is screwed until the ceramic impeller and the impeller fixing plate 910 are separated from the impeller shaft 960 under the action of the top pressure head of the impeller dismounting tool 940, and the threaded rod of the impeller dismounting tool 940 is screwed off the impeller fixing plate 910 after the top pressure head is dismounted.
By the disassembly method, the ceramic impeller can be integrally separated from the impeller shaft, and the ceramic layer coated on the metal framework can be prevented from being damaged.
The foregoing describes preferred embodiments of the present invention, but the spirit and scope of the present invention is not limited to the specific disclosure herein. Those skilled in the art can freely combine and expand the above embodiments in accordance with the teachings of the present invention to make further embodiments and applications within the spirit and scope of the present invention. The spirit and scope of the present invention are not to be limited by the specific embodiments but by the appended claims.
List of reference numerals
100 metal framework
110 front cover plate
120 blade
130 rear cover plate
210 (on the front cover plate) through hole
220 (on blade) through hole
230 (on the back cover plate)
240 (on the reinforcing bar)
300 notch
400 reinforcing rib
500 (of the front cover plate end side)
610 (on the back cover plate) ceramic layer
620 ceramic layer (on front cover plate)
630 (on blade) ceramic layer
700 recess
800 dorsal leaf
910 impeller fixing plate
920 impeller cap
930 center connecting bolt
940 impeller dismounting tool
950 bolt connecting hole
960 an impeller shaft.
Claims (7)
1. A ceramic impeller, the ceramic impeller includes the metal skeleton (100) and ceramic layer (610, 620, 630) that is shaped with the metal skeleton in the way of vacuum casting, the said metal skeleton includes the front shroud (110), back shroud (130), and the blade (120) that is set up between front shroud (110) and back shroud (130), there are through holes (210, 220, 230) in the front shroud (110) of the said metal skeleton (100), back shroud (130) and blade (120) respectively, the said through hole (210, 220, 230) is used for fixing the ceramic layer (610, 620, 630) of the said ceramic impeller, characterized by that,
the front cover plate (110) end side of the metal framework is provided with a groove (500), or the back side of the back cover plate (130) is provided with a reinforcing rib (400), or the periphery of the back cover plate (130) is provided with a notch (300) for holding the ceramic layer (610, 620, 630) poured on the metal framework.
2. The ceramic impeller of claim 1, wherein the wall thickness and the positions of the through holes of the metal skeleton (100) and the shapes and positions of the ribs (400), notches (300) and grooves (500) are determined by a simulated computational analysis of the three-dimensional contouring to ensure that the ceramic impeller always meets the strength and stress requirements when the pump is running.
3. The ceramic impeller of claim 1, wherein a structure (700, 800) adapted to pump fluid is provided on the outer surface of the ceramic layer (610) on the metallic skeleton back cover plate of the ceramic impeller.
4. Ceramic impeller according to claim 3, characterized in that the structure adapted to pump fluid is a protruding back lobe (800) or a recess (700).
5. Ceramic impeller according to any of claims 1 to 4, characterized in that the metal skeleton (100) of the ceramic impeller has a metal area in the hub front end area, which is not covered by a ceramic layer, which metal area has several threaded holes (950) adapted to a bolt connection.
6. A ceramic impeller fastening device for fastening a ceramic impeller to an impeller shaft (960), the metal skeleton (100) of which has, in the hub nose area, a metal area not covered by a ceramic layer, the ceramic impeller fastening device comprising:
an impeller fixing plate (910), the impeller fixing plate (910) being adapted to be connected to uniformly arranged threaded holes (950) on the metal area by means of a plurality of fastening bolts;
an impeller cap (920), the impeller cap (920) being connected to an impeller shaft (960) of the ceramic impeller by means of a central connection bolt (930) passing through the impeller fixing plate (910);
wherein the impeller cap (920) circumferentially surrounds the impeller retaining plate and axially abuts the metal region with a gap (H) from the ceramic layer of the ceramic impeller.
7. Ceramic impeller fixation device according to claim 6, characterized in that the impeller cap (920) and the central connection bolt (930) are constructed as one piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021810216.1U CN212407115U (en) | 2020-08-26 | 2020-08-26 | Ceramic impeller and ceramic impeller fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021810216.1U CN212407115U (en) | 2020-08-26 | 2020-08-26 | Ceramic impeller and ceramic impeller fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212407115U true CN212407115U (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021810216.1U Active CN212407115U (en) | 2020-08-26 | 2020-08-26 | Ceramic impeller and ceramic impeller fixing device |
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| Country | Link |
|---|---|
| CN (1) | CN212407115U (en) |
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- 2020-08-26 CN CN202021810216.1U patent/CN212407115U/en active Active
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