CN211202350U - Centrifugal fan of air-cooled generator - Google Patents
Centrifugal fan of air-cooled generator Download PDFInfo
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- CN211202350U CN211202350U CN201921760068.4U CN201921760068U CN211202350U CN 211202350 U CN211202350 U CN 211202350U CN 201921760068 U CN201921760068 U CN 201921760068U CN 211202350 U CN211202350 U CN 211202350U
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Abstract
The utility model relates to an air-cooled generator centrifugal fan belongs to motor structural design technique, relates to an air-cooled generator centrifugal fan. The wind power generator is characterized by comprising a small impeller (1), a large impeller (2), a plurality of blades (3), a fan bushing (4) assembled on a rotor shaft of the generator, a support ring (5) for fixing the fan bushing and the small impeller and a plurality of hollow rivets (6). The utility model provides an air-cooled generator centrifugal fan structure, parts machining is simple, and is small, light in weight, easily dismouting, it is convenient to maintain, and the blade assembly has the error-proofing function.
Description
Technical Field
The utility model belongs to motor structural design technique relates to a centrifugal fan structure of forced air cooling generator.
Background
Aviation alternators are typically small in volume and weight, high in power density, high in power to weight ratio, designed to make full use of materials to reduce weight, and high in current density and line load. The stator, the rotor winding and the iron core of the generator generate a large amount of heat in the working process of the generator with load, and the generator generates heat and has higher temperature rise. In order to timely and effectively dissipate internal heat and improve the safety and the service life of the generator, an aviation air-cooled alternating-current generator is generally provided with an air guide pipe for forced ventilation cooling, according to the installation position and the use environment of the generator on an airplane, the forced ventilation cooling needs to introduce head-on forced ventilation outside the airplane, and for the alternating-current generator installed in an airplane cabin, the head-on forced ventilation is not needed, and self-fan cooling is needed to be designed for heat dissipation. The traditional centrifugal fan impeller is of a symmetrical structure, blades have certain radian, the processing is complex, and the air quantity is small.
Disclosure of Invention
The utility model aims at: the centrifugal fan structure of the air-cooled generator is simple in part processing, small in size, light in weight, large in air quantity, easy to disassemble and assemble and convenient to maintain, and the blade assembly has an error-preventing function.
The technical scheme of the utility model is that: a centrifugal fan of an air-cooled generator comprises a small impeller 1, a large impeller 2, blades 3, a fan bushing 4 assembled on a rotor shaft of the generator, a support ring 5 for fixing the fan bushing 4 and the small impeller 1 and a corresponding hollow rivet 6, wherein the fan bushing 4 is riveted with the small impeller 1 through the support ring 5 and the hollow rivet 6, and a plurality of mounting lugs of the blades 3 are welded in mounting holes of the large impeller 2 and the small impeller 1. The entire centrifugal fan is mounted on the generator shaft by means of the fan bush 4 inner bore and rectangular keys.
The small impeller 1 and the large impeller 2 have the same structure, and the outer diameter of the small impeller 1 is smaller than that of the large impeller 2. The surface circumferences of the small impeller 1 and the large impeller 2 are uniformly provided with a plurality of rectangular blade mounting holes, and the included angle between each mounting hole and the horizontal line is 20-45 degrees. The center of the small impeller 1 is provided with an air inlet which is a circular hole, and a plurality of hollow rivet 6 mounting holes are uniformly distributed around the air inlet. The main body of the blade 3 is of a straight plate structure, and rectangular mounting lugs are arranged on two sides of the blade 3. The width of the mounting lugs on two sides of the blade 3 is different, the error-proof function can be realized, the head of the blade is rectangular, the two sides of the head are rounded, the radius is R3-R5, and the tail of the blade is provided with an air guide opening which is 20-30 degrees to the horizontal line. The inner hole of the fan bush 4 is matched with a generator shaft, a key groove is formed in the inner hole, the fan bush is assembled on the generator shaft through a rectangular key, and hollow rivet 6 mounting holes are formed in the circumferential direction of the edge of a disk of the fan bush 4.
The utility model has the advantages that: the centrifugal fan structure of the air-cooled generator is simple in part machining, small in size, light in weight, easy to disassemble and assemble and convenient to maintain, and the blades have an error-preventing function in blade assembly.
Drawings
Fig. 1 is a schematic view of the fan structure of the present invention.
Fig. 2 is a schematic structural view of the impeller of the present invention.
Fig. 3 is a schematic view of the blade structure of the present invention.
FIG. 4 is a schematic view of the structure of the fan bushing of the present invention
Detailed Description
The present invention will be described in further detail below. Referring to fig. 1, a centrifugal fan of an air-cooled generator is characterized by comprising a small impeller 1, a large impeller 2, a certain number of blades 3, a fan bushing 4 assembled on a rotor shaft of the generator, a support ring 5 for fixing the fan bushing and the small impeller and a corresponding hollow rivet 6. Referring to fig. 2, the impeller structure is characterized in that rectangular blade mounting holes 11 are uniformly distributed on the circumference of the surface of the impeller, and the included angle between the mounting holes 11 and the horizontal line is 20-45 degrees; the center of the impeller is provided with an air inlet 13 which is a circular hole; rivet mounting holes 12 are uniformly distributed around the air inlet. Referring to fig. 3, the blade is characterized in that the main body of the blade is a straight plate structure 21, the two sides of the blade are distributed with protruded mounting lugs 22 and 23, and the mounting lugs are rectangular and can be reliably assembled with the impeller; the mounting lugs on two sides have different widths, so that the error-proof function can be realized; the head of the blade is rectangular, the two sides of the head are rounded 25, and the radius is R3-R5; the tail part of the blade is provided with an air guide port 24 which is 20-30 degrees with the horizontal line. Referring to fig. 4, the fan bushing is characterized in that a bushing inner hole 51 is matched with a generator shaft, and the inner hole is provided with a rectangular key groove 52 which is assembled on the generator shaft through a rectangular key; rivet mounting holes 53 are circumferentially formed in the edge of the bushing disk and are assembled with the small impeller 1 through the small impeller supporting ring 5 and the hollow rivets 6; the air inlet and the mounting end face of the fan bushing are provided with an arc connection 54, and the arc radius is R20-R25.
The utility model discloses a use method is: referring to fig. 1, the rectangular key is installed in a slot of the centrifugal fan and assembled with the centrifugal fan to a rotating shaft, and the rotating shaft is provided with a rectangular slot. And a fan fixing end ring is arranged on the end face of the fan bushing, and the fan is fastened on the rotating shaft through a fastening screw and a gasket.
The utility model discloses an embodiment: rectangular blade mounting holes 11 are uniformly distributed on the circumference of the surface of the impeller, the included angle between each mounting hole 11 and the horizontal line is 30 degrees, a wind guide opening 24 is formed in the tail part of each blade, and four blade mounting lugs which are 25 degrees to the horizontal line are arranged on one side.
Claims (8)
1. The centrifugal fan is characterized by comprising a small impeller (1), a large impeller (2), blades (3), a fan bushing (4) assembled on a rotor shaft of the generator, a support ring (5) for fixing the fan bushing (4) and the small impeller (1) and corresponding hollow rivets (6), wherein the fan bushing (4) is riveted with the small impeller (1) through the support ring (5) and the hollow rivets (6), and mounting lugs of a plurality of blades (3) are welded in mounting holes of the large impeller (2) and the small impeller (1).
2. An air-cooled generator centrifugal fan as claimed in claim 1, characterized in that the centrifugal fan is mounted on the generator shaft by means of a fan bushing (4) inner bore and rectangular keys.
3. An air-cooled generator centrifugal fan according to claim 1, characterized in that the small impeller (1) and the large impeller (2) are of identical construction, the small impeller (1) having a smaller outer diameter than the large impeller (2).
4. The centrifugal fan of the air-cooled generator as recited in claim 1, characterized in that the surface circumferences of the small impeller (1) and the large impeller (2) are uniformly provided with a plurality of rectangular blade mounting holes, and the angle between the mounting holes and the horizontal line is 20-45 degrees.
5. The centrifugal fan of the air-cooled generator as claimed in claim 1, wherein the small impeller (1) is provided with an air inlet at the center, the air inlet is a circular hole, and a plurality of hollow rivet (6) mounting holes are uniformly distributed around the air inlet.
6. The centrifugal fan of the air-cooled generator as recited in claim 1, wherein the body of the blade (3) is a straight plate structure, and rectangular mounting ears are provided on both sides of the blade (3).
7. The centrifugal fan of air-cooled generator as claimed in claim 6, characterized in that the width of the mounting ears on both sides of the blade (3) is different to achieve the function of error prevention, the head of the blade is rectangular, the two sides of the head are rounded, the radius is R3-R5, the tail of the blade is provided with a wind guiding opening, and the angle between the wind guiding opening and the horizontal line is 20-30 degrees.
8. An air-cooled generator centrifugal fan according to claim 1, characterized in that the inner hole of the fan bushing (4) is fitted with the generator shaft, the inner hole is splined and fitted on the generator shaft by means of rectangular keys, and the edge of the disk of the fan bushing (4) is provided with blind rivet (6) mounting holes circumferentially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921760068.4U CN211202350U (en) | 2019-10-18 | 2019-10-18 | Centrifugal fan of air-cooled generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921760068.4U CN211202350U (en) | 2019-10-18 | 2019-10-18 | Centrifugal fan of air-cooled generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211202350U true CN211202350U (en) | 2020-08-07 |
Family
ID=71862157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921760068.4U Active CN211202350U (en) | 2019-10-18 | 2019-10-18 | Centrifugal fan of air-cooled generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211202350U (en) |
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2019
- 2019-10-18 CN CN201921760068.4U patent/CN211202350U/en active Active
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