CN203051214U - Wear-resistant draught fan - Google Patents
Wear-resistant draught fan Download PDFInfo
- Publication number
- CN203051214U CN203051214U CN 201320031702 CN201320031702U CN203051214U CN 203051214 U CN203051214 U CN 203051214U CN 201320031702 CN201320031702 CN 201320031702 CN 201320031702 U CN201320031702 U CN 201320031702U CN 203051214 U CN203051214 U CN 203051214U
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- wear
- blade
- game
- wearing plate
- welding
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Abstract
The utility model provides a wear-resistant draught fan which is suitable for conveying high-concentration dust. The wear-resistant draught fan comprises a rotor main shaft, a wheel cap and a vane. The vane is formed by an inner center disc and an outer center disc in a welding mode. The rotor main shaft is fixedly connected with the inner center disc through a connecting bolt. The wear-resistant draught fan is characterized by further comprising a protection cover. One end of the protection cover is welded with the main shaft, and the other end of the protection cover is welded with the inner center disc, so that the connecting bolt is arranged in a space defined by the protection cover, the main shaft and the inner center disc. The wear-resistant draught fan protects an air inlet end, which is worn most easily, of the vane by the adoption of a wear-resistant nose, and protects the vane by the adoption of a wear-resistant plate, the wear-resistant nose and the wear-resistant plate can be replaced without limit, the service life of a rotor of the draught fan can be prolonged greatly, the time for maintaining and replacing is shortened greatly, and the loss caused by machine halt of a users is minimized, so that cost is saved, and production rate is improved.
Description
Technical field
The invention belongs to fluid machinery class field, specially refer to a kind of wear-resisting blower fan.
Background technique
Blower fan is at chemical industry at present, the mine, metallurgical, industry-by-industry purposes such as environmental protection are more extensive, the restriction of some technological requirements and medium dust concentration that fan rotor is carried are higher in the use, restrain every cubic metre as dust concentration greater than 100～200, wearing and tearing were very fast during rotor used, life-span is shorter, the life-span that has has only two to three months, bigger fan rotor complete machine cost reaches hundreds of thousands, no matter be often maintenance or replacing, tremendous loss is brought to the user in the capital, so develop the blower fan of long-life conveying high concentrate dust, be a kind of pressing at the moment.
The rotor of conventional fan is by mid-game in the connecting bolt of main shaft, main shaft and impeller, the blade, and outer mid-game, wheel cap are formed, and the rotation of main axis rotation impeller produces pressure, fed sheet of a media from impeller inlet through the blade acting to outlet.Carrying the rotor abrading section of dust is connecting bolt, blade pressure working surface, the mid-game of main shaft, main shaft and impeller.Be the wearing and tearing of antagonism dust, in the working life of improving rotor, following several solution arranged at present:
1, blade surface is pasted pottery, it is bigger that but ceramic plate is subjected to the influence of fan vibration, adhesive glue quality, and the situation that often has ceramic plate to come off in the use must be stopped and be repaired, be subjected to the restriction of bonding glue simultaneously, the medium temperature of using generally can not be above 150 degrees centigrade at present.
2, build-up wear-resistant alloy on the blade body, built-up welding has damage to the body of blade, can cause the intensity of blade to descend, its Security is reduced, so can only adopt welding at interval, can not be at the surface overlaying wearing layer of whole blade, be subjected to the restriction of blade body thickness simultaneously, built-up welding thickness is generally less than 8 millimeters, blocked uply then in damaged blade, also cause built-up welding to come off easily, because the gap affects between the wearing layer of wear-resisting thinner thickness and built-up welding, often need parking to the wearing layer repair welding after losing efficacy in the actual use, repair welding connects on impeller, because impeller channel is narrow different everywhere with abrading section and wear extent blade, and the uniformity that artificial repair welding connects, conformity is relatively poor, dust-contained airflow when causing moving like this is inhomogeneous to blade wear-resistant surfaces impact wear, causes the balancing rotor of blower fan to destroy, the maintenance again of having to stop, generally through several times repairing, impeller has also just been scrapped.
3 patent of invention--" a kind of wear-resisting type boiler induced-draft fan impeller application number: 201210172452 " and model utility----" a kind of novel wear resistant draught fan impeller, notice of authorization number: 202520616 u " all propose in impeller surface high-abrasive material to be set, but this high-abrasive material after losing efficacy, is very difficult to maintenance and replacing long-time the use.
4, existing blade surface adopts the wearing plate protection, all is that full weld connects the mode of middle perforate plug welding around adopting wearing plate and blade, wearing plate needed manually to blow down weld seam after losing efficacy, change new wearing plate, but narrow space in the runner of impeller, and maintain and replace is very difficult; And in order to guarantee the join strength of wearing plate and blade, it is firm to weld, so the fusion length that connects is longer, repair the attachment weld that needs blowing repeatedly, simultaneously blade has also been brought damage, caused maintain and replace wearing plate number of times restricted, repair density is bigger simultaneously.
The entrance point position of impeller blade is the most serious positions of rotor wearing and tearing; so this position is inefficacy the most easy to wear; therefore the wear strength that how to improve this position also is the subject matter that faces; and above-mentioned prior art all adopts the mode of reinforced blade intensity or replacing blade; do not mention how going to prevent wearing and tearing; and adopt the mode of changing to need to shut down, influence is produced, and has improved cost.
Summary of the invention
The objective of the invention is to propose a kind of wear-resisting blower fan that is suitable for carrying high concentrate dust.
Wear-resisting blower fan of the present invention comprises rotor main shaft, wheel cap and blade; described blade is welded by interior mid-game, outer mid-game; described rotor main shaft is fixedlyed connected with interior mid-game by connecting bolt; key is that this wear-resisting blower fan also comprises safety cover; one end of described safety cover and the welding of described main shaft; the other end and interior mid-game welding, thus with connecting bolt cover in safety cover, main shaft and in the space that surrounds of mid-game.
Safety cover can avoid dust to the erosive wear of connecting bolt, safety cover wearing and tearing back repair welding or all cut off after renew again because this position is positioned at the import of impeller, easy to replace and maintain.
Further, described blade pass is crossed second bolt, nut is equipped with wearing plate, and described wearing plate and blade are provided with corresponding some through holes, the through hole of the described second screw bolt passes wearing plate and blade, and be connected with nut, thereby with wearing plate and vanes fixed; " the nut protecting jacket of ［ " shape is installed between the through hole of described nut and blade; After the sidewall plug welding of the end face of described second bolt and wearing plate through hole, polish to equal with the wearing plate surface.Wearing plate and blade are that the mode of bolt and nut is fixed, and are convenient to change in wearing plate wearing and tearing back; And nut has protecting jacket, and the plug welding of bolt end face can prevent the dust worn nut and connect the bolt end of wearing plate and the slit of wearing plate.
Further, be welded with infill panel in the through hole of described wearing plate, described infill panel is provided with for the counterbore that second bolt is installed, the counterbore of the second screw bolt passes infill panel and the through hole of blade, and be connected with nut.Wearing plate is because hardness is harder, be not easy to drill bit or milling machine boring, so can only take the method for plasma, laser beam cutting, but process can construction bolt counterbore difficulty, the present invention is by the mode of welding infill panel in the through hole of wearing plate, solved the problems referred to above, provided cost savings.
Further, the end of described blade inlet end is welded with wear-resisting nose, and the thickness of described wear-resisting nose is more than or equal to the thickness of blade.The blade inlet end is the most serious place of wearing and tearing, and by at the wear-resisting nose of this place's welding, is conducive to improve the wear strength of blade inlet end.After wear-resisting nose may wear to a certain degree, cut off the wear-resisting nose of wearing and tearing from weld, the wear-resisting nose that more renews gets final product, because wear-resisting nose is positioned at the import position of impeller, the blade of this position and other parts are welding not, directly do not cut off during replacing and can cause damage, can unrestrictedly change, and be convenient to operation.
Further, described outer mid-game is welded with protection apron, and described outer mid-game utilizes built-up welding to be provided with protection built-up welding band around the protection apron end in the weld joint, end of protection apron, with the inefficacy that prevents that this weld seam is too early.
Wear-resisting blower fan of the present invention utilizes wear-resisting nose that the blade inlet end that is vulnerable to wear and tear is most protected; utilize wearing plate that blade is protected; and wear-resisting nose and wearing plate can unrestrictedly be changed; can greatly improve the working life of fan rotor; and shortened dramatically the maintain and replace time; the loss that the user is caused because of shutdown has dropped to minimum, thereby has saved cost, has improved productivity.
Description of drawings
Fig. 1 is the structural representation of embodiment 1 blower fan.
Fig. 2 is the partial structurtes schematic representation of embodiment 1 blade.
Fig. 3 is the A-A sectional view of Fig. 2.
Fig. 4 is the partial sectional view of wearing plate.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the effect of the mutual alignment between the shape of the specific embodiment of the present invention such as related each member, structure, the each several part and annexation, each several part and working principle etc. are described in further detail.
Embodiment 1:
As shown in the figure; the wear-resisting blower fan of present embodiment comprises rotor main shaft 1, wheel cap 2 and blade 3; described blade 3 is welded by interior mid-game 4, outer mid-game 5; described rotor main shaft 1 is fixedlyed connected with interior mid-game 4 by connecting bolt 6; key is that this wear-resisting blower fan also comprises safety cover 7, and an end of described safety cover 7 wraps up main shaft 1, and welds with main shaft 1 plug welding; the other end and interior mid-game 4 welding, thus with connecting bolt 6 cover in safety cover 7, main shaft 1 and in the space that surrounds of mid-game 4.
The end of blade 3 inlet ends is welded with wear-resisting nose 13, and the thickness of wear-resisting nose 13 is more than or equal to the thickness of blade 3.
Wear-resisting blower fan of the present invention utilizes wear-resisting nose that the blade inlet end that is vulnerable to wear and tear is most protected; utilize wearing plate that blade is protected; and wear-resisting nose and wearing plate can unrestrictedly be changed; can greatly improve the working life of fan rotor; and shortened dramatically the maintain and replace time; the loss that the user is caused because of shutdown has dropped to minimum, thereby has saved cost, has improved productivity.
Claims (6)
1. wear-resisting blower fan; comprise rotor main shaft, wheel cap and blade; described blade is welded by interior mid-game, outer mid-game; described rotor main shaft is fixedlyed connected with interior mid-game by connecting bolt; it is characterized in that this wear-resisting blower fan also comprises safety cover; the welding of one end of described safety cover and described main shaft, the other end and interior mid-game welding, thus connecting bolt is covered in the space that safety cover, main shaft and interior mid-game surround.
2. wear-resisting blower fan according to claim 1, it is characterized in that described blade pass is crossed second bolt, nut is equipped with wearing plate, described wearing plate and blade are provided with corresponding some through holes, the through hole of the described second screw bolt passes wearing plate and blade, and be connected with nut, thereby with wearing plate and vanes fixed; " the nut protecting jacket of ［ " shape is installed between the through hole of described nut and blade; After the sidewall plug welding of the end face of described second bolt and wearing plate through hole, polish to equal with the wearing plate surface.
3. wear-resisting blower fan according to claim 2, it is characterized in that being welded with infill panel in the through hole of described wearing plate, described infill panel is provided with for the counterbore that second bolt is installed, the counterbore of the second screw bolt passes infill panel and the through hole of blade, and be connected with nut.
4. according to claim 1 or 2 or 3 described wear-resisting blower fans, it is characterized in that the end of described blade inlet end is welded with wear-resisting nose, the thickness of described wear-resisting nose is more than or equal to the thickness of blade.
5. according to claim 1 or 2 or 3 described wear-resisting blower fans, it is characterized in that described outer mid-game is welded with protection apron, described outer mid-game utilizes built-up welding to be provided with protection built-up welding band around the protection apron end in the weld joint, end of protection apron.
6. wear-resisting blower fan according to claim 4 is characterized in that described outer mid-game is welded with protection apron, and described outer mid-game utilizes built-up welding to be provided with protection built-up welding band around the protection apron end in the weld joint, end of protection apron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320031702 CN203051214U (en) | 2013-01-22 | 2013-01-22 | Wear-resistant draught fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320031702 CN203051214U (en) | 2013-01-22 | 2013-01-22 | Wear-resistant draught fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203051214U true CN203051214U (en) | 2013-07-10 |
Family
ID=48734172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320031702 Expired - Fee Related CN203051214U (en) | 2013-01-22 | 2013-01-22 | Wear-resistant draught fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203051214U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062095A (en) * | 2013-01-22 | 2013-04-24 | 安徽安风风机有限公司 | Wear-resistant fan |
| CN103671247A (en) * | 2013-12-13 | 2014-03-26 | 龙口矿业集团有限公司 | Blower wheel with rivet portion provided with anti-abrasion stop dogs |
-
2013
- 2013-01-22 CN CN 201320031702 patent/CN203051214U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062095A (en) * | 2013-01-22 | 2013-04-24 | 安徽安风风机有限公司 | Wear-resistant fan |
| CN103062095B (en) * | 2013-01-22 | 2016-05-04 | 安徽安风风机有限公司 | A kind of wearable fan |
| CN103671247A (en) * | 2013-12-13 | 2014-03-26 | 龙口矿业集团有限公司 | Blower wheel with rivet portion provided with anti-abrasion stop dogs |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20170122 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |