CN217002392U - Hollow anti-abrasion blade of centrifugal fan - Google Patents
Hollow anti-abrasion blade of centrifugal fan Download PDFInfo
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- CN217002392U CN217002392U CN202220286729.XU CN202220286729U CN217002392U CN 217002392 U CN217002392 U CN 217002392U CN 202220286729 U CN202220286729 U CN 202220286729U CN 217002392 U CN217002392 U CN 217002392U
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Abstract
The utility model belongs to the technical field of high-temperature wear-resistant fans, and particularly relates to a hollow wear-resistant blade of a centrifugal fan, which comprises: main blade, vice blade, wear plate. Wherein the main blade links to each other through welding and impeller front disc, well dish, and the wear plate passes through welding or bolted connection on the main blade working face, and vice blade passes through welded connection on the main blade non-working face. The method is characterized in that: the thickness of the main blade is larger than that of the auxiliary blade; large-area hollowing out the inner part of the main blade; the auxiliary blade covers the digging position of the main blade; the main blade, the auxiliary blade and the wear-resistant plate can be connected into a whole through welding or bolts; the main blade hole can be set to be porous or single hole according to the size of the blade. The utility model mainly solves the problems that: the root stress of the blade of the high-temperature abrasion-proof centrifugal fan is reduced, the weight and the rotational inertia of the fan rotor are reduced, and the safe and stable operation of the fan is ensured.
Description
Technical Field
The utility model belongs to the technical field of high-temperature wear-resistant fans, and particularly relates to a hollow wear-resistant blade for a high-temperature high-rotation-speed large-flow centrifugal fan.
Background
The centrifugal ventilator has the characteristics of simple structure, high reliability, convenient maintenance and the like, and is widely applied to a heat-engine plant, a primary fan, a desulfurization booster fan, a steel plant blast drying fan, a backheating fan, a main exhaust fan and the like. The wear-proof plate is arranged on the working surface of the blade, which is a wear-proof mode widely adopted in centrifugal fans. In order to meet the requirements of energy conservation and emission reduction in recent years, steel plants, cement plants and the like use large-yield systems to replace a plurality of original small-yield systems to achieve the purposes of increasing yield and increasing efficiency, so the design flow of related centrifugal fans is increasingly large. With the increase of the design flow, the fan design scheme which can be adopted comprises a low-rotation-speed fan and a high-rotation-speed fan. The diameter of the impeller of the low-rotating-speed fan is about 20% -35% of that of the high-rotating-speed fan generally, along with the increase of the diameter of the impeller, the number of matched motors is increased due to the corresponding increase of stators and rotating groups such as a shell, the manufacturing difficulty and the production cost of the fan are increased, and the competitiveness of the fan is reduced. If adopt high rotational speed centrifugal fan, can avoid above-mentioned problem, but in high rotational speed high temperature centrifugal fan, in order to guarantee impeller intensity, blade thickness is great usually, though reduces to some extent than low rotational speed fan moment of inertia on the whole, but blade weight is too big when high rotational speed leads to blade root stress great, causes the accident easily. In order to reduce the root stress of the abrasion-proof centrifugal fan blade and reduce the weight and the rotational inertia of the fan rotor, the improvement of the traditional centrifugal abrasion-proof blade is urgently needed, and a new product with a reliable structure and stronger competitiveness is developed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to reduce the root stress of an anti-abrasion centrifugal fan blade, reduce the weight and the rotational inertia of a fan rotor, improve the safety and the stability of a fan and reduce the cost of the fan, and therefore, the utility model provides a hollow anti-abrasion blade scheme.
The technical scheme of the utility model is as follows: a centrifugal fan wear blade, the blade comprising: main blade, vice blade, wear plate. Wherein the main blade links to each other through welding and impeller front disc, well dish, and the wear plate passes through welding or bolted connection on the main blade working face, and vice blade passes through welded connection on the main blade non-working face. The method is characterized in that: the thickness of the main blade is larger than that of the auxiliary blade; large-area hollowing out the inner part of the main blade; the auxiliary blade covers the digging position of the main blade; the main blade, the auxiliary blade and the wear-resistant plate can be connected into a whole through welding or bolts; the main blade hole can be set to be porous or single hole according to the size of the blade.
The utility model has the beneficial effects that: under the same design strength requirement, the whole blade is lighter in weight and lower in rotational inertia, the designed weight of the main shaft is reduced after the weight of the impeller is reduced, a bearing with lower load can be selected when the total weight of the whole rotor is reduced, and the matched motor is more cost-saving when the rotational inertia of the rotor is reduced.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a partially enlarged view of the structural schematic of the present invention.
In the drawings, corresponding technical features are labeled as follows:
1-wear-proof plate, 2-auxiliary blade, 3-main blade
Detailed Description
The utility model is further illustrated by the following figures and examples.
As shown in figure 1 or 2, when the utility model is implemented, the middle part of the main blade designed according to the traditional scheme is hollowed according to calculation to form the main blade (3) and is welded with the front disc and the middle disc of the impeller, then the wear-resistant plate is connected on the working surface of the main blade by adopting fillet welding or bolts at the periphery, the open hole of the main blade is firmly welded by adopting a circumferential welding line, and finally the auxiliary blade covers the hole on the main blade and is firmly sealed and welded by adopting the circumferential welding line to finish the installation. Practical use shows that the high-temperature centrifugal fan adopting the hollow anti-abrasion blade is reliable in operation and can stably operate on the premise of reducing cost practically.
Claims (1)
1. A centrifugal fan hollow wear blade, the blade comprising: the main blade, the auxiliary blade and the wear-resistant plate; the main blade is connected with the front disk and the middle disk of the impeller through welding, the wear-resistant plate is connected on the working surface of the main blade through welding or bolts, and the auxiliary blade is connected on the non-working surface of the main blade through welding or bolts; the method is characterized in that: the thickness of the main blade is larger than that of the auxiliary blade; large-area hollowing out the inner part of the main blade; the auxiliary blade covers the digging position of the main blade; the main blade, the auxiliary blade and the wear-resistant plate can be connected into a whole through welding or bolts; the main blade is provided with holes, and the holes can be set to be porous or single holes according to the size of the blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220286729.XU CN217002392U (en) | 2022-02-11 | 2022-02-11 | Hollow anti-abrasion blade of centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220286729.XU CN217002392U (en) | 2022-02-11 | 2022-02-11 | Hollow anti-abrasion blade of centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217002392U true CN217002392U (en) | 2022-07-19 |
Family
ID=82393709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220286729.XU Active CN217002392U (en) | 2022-02-11 | 2022-02-11 | Hollow anti-abrasion blade of centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217002392U (en) |
-
2022
- 2022-02-11 CN CN202220286729.XU patent/CN217002392U/en active Active
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