CN220522873U - Double-impeller fan main shaft - Google Patents
Double-impeller fan main shaft Download PDFInfo
- Publication number
- CN220522873U CN220522873U CN202321986382.0U CN202321986382U CN220522873U CN 220522873 U CN220522873 U CN 220522873U CN 202321986382 U CN202321986382 U CN 202321986382U CN 220522873 U CN220522873 U CN 220522873U
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- China
- Prior art keywords
- impeller
- main shaft
- pull rod
- fan
- primary
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- 238000005299 abrasion Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a double-impeller fan main shaft, and belongs to the technical field of fan main shafts. The device comprises a main shaft, wherein a primary impeller and a secondary impeller are arranged at two ends of the main shaft, the main shaft is connected with the primary impeller and the secondary impeller through a pull rod, and the pull rod and the main shaft are coaxial; the pull rod is provided with a shoulder for supporting the primary impeller and the secondary impeller, the pull rod is provided with threads, and the screw cap is matched with the threads to fasten the primary impeller and the secondary impeller. The utility model provides a double-impeller fan main shaft which effectively reduces the increase of unbalance caused by the influence of a screw after dynamic balance, stabilizes the unbalance position, reduces the vibration of a fan, maintains the stability of a bearing, and improves the controllability of the fan, thereby reducing the abrasion of the bearing, greatly prolonging the service life of the bearing and improving the controllability of the fan.
Description
Technical Field
The utility model relates to a double-impeller fan main shaft, and belongs to the technical field of fan main shafts.
Background
The traditional impeller fan uses independent screw rods to be matched with screw holes on the main shaft to enable the impeller to be fastened on the main shaft, and after the rotor and the impeller are in dynamic balance, the whole unbalance amount can be increased by disassembling and assembling the screw rods. The concentricity of the screw cannot be guaranteed to be consistent with the concentricity of the main shaft, meanwhile, a gap is reserved between the screw thread of the screw and the inner thread of a screw hole of the main shaft, the screw is screwed into the main shaft to have axial and radial play, and after fastening, the distribution position of the overall unbalance of the rotor can be changed due to different starting positions of screwing, so that the overall unbalance of the rotor is increased. The double-impeller fan is directly driven by the high-speed motor, impellers are assembled at two ends of the main shaft, the influence of the disassembly and assembly of the screw on the position and the size of the unbalanced quantity of the rotor after dynamic balance is larger, so that the unbalanced quantity is increased, the vibration of the fan is increased, the bearing is seriously threatened to safely run by too high vibration, the service life of the bearing is prolonged, and the running safety of the fan is greatly endangered.
Disclosure of Invention
In view of the above, the utility model provides a double-impeller fan spindle, which effectively reduces the increase of unbalance caused by the influence of a screw after dynamic balance, stabilizes the unbalance position, reduces the vibration of a fan, maintains the stability of a bearing, and improves the controllability of the fan, thereby reducing the abrasion of the bearing, greatly prolonging the service life of the bearing and improving the controllability of the fan.
The utility model provides a double-impeller fan main shaft which comprises a main shaft, wherein a primary impeller and a secondary impeller are arranged at two ends of the main shaft, the main shaft is connected with the primary impeller and the secondary impeller through a pull rod, and the pull rod and the main shaft are coaxial;
the pull rod is provided with a shoulder for supporting the primary impeller and the secondary impeller, the pull rod is provided with threads, and the screw cap is matched with the threads to fasten the primary impeller and the secondary impeller.
Preferably, the shoulder is positioned at the upper side and the lower side of one end of the pull rod far away from the main shaft and symmetrically arranged.
Preferably, the direction of the pull rod, which is close to the primary impeller, is a positive rotation thread, and the direction of the pull rod, which is close to the secondary impeller, is a negative rotation thread.
Preferably, the shoulder is located on the thread facing spindle face.
Preferably, a fairing is arranged at one end of the primary impeller and the secondary impeller, which is far away from the main shaft, and the fairing is connected with the primary impeller and the secondary impeller through screws.
The utility model has the beneficial effects that:
the utility model provides a double-impeller fan main shaft which effectively reduces the increase of unbalance caused by the influence of a screw after dynamic balance, stabilizes the unbalance position, reduces the vibration of a fan, maintains the stability of a bearing, and improves the controllability of the fan, thereby reducing the abrasion of the bearing, greatly prolonging the service life of the bearing and improving the controllability of the fan.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a main shaft of a double-impeller fan according to the present utility model.
Fig. 2 is a schematic diagram of an exploded structure of a spindle of a bilobed fan according to the utility model.
(1, main shaft, 2, primary impeller, 3, secondary impeller, 4, pull rod, 5, shoulder, 6, fairing)
Detailed Description
Preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. The utility model provides a double-impeller fan main shaft which comprises a main shaft 1, wherein a primary impeller 2 and a secondary impeller 3 are arranged at two ends of the main shaft 1, the main shaft 1 is connected with the primary impeller 2 and the secondary impeller 3 through a pull rod 4, and the pull rod 4 and the main shaft 1 are coaxial; the pull rod 4 is provided with threads, the screw cap is matched with the threads to fasten the primary impeller (2) and the secondary impeller (3), the threads are provided with shoulders 5 for supporting the primary impeller 2 and the secondary impeller 3, the shoulders 5 are symmetrically arranged on the upper side and the lower side of the surface of the spindle 1, the pull rod 4 is a forward-rotation thread close to the primary impeller 2, and the pull rod 4 is a reverse-rotation thread close to the secondary impeller 3;
one end, far away from the main shaft 1, of the primary impeller 2 and the secondary impeller 3 is provided with a fairing 6, and the fairing 6 is connected with the primary impeller 2 and the secondary impeller 3 through screws.
According to the utility model, the coaxiality of the whole main shaft is ensured to be consistent through the coaxiality of the main shaft 1 and the pull rod 4, the problem that the unbalanced position and the unbalanced size of a rotor system are greatly influenced by a screw rod after the screw rod is disassembled and assembled is avoided, the variable quantity of the unbalanced position and the unbalanced size caused by the screw rod and the main shaft is reduced, so that the vibration of a fan is controlled to be smaller, the abrasion of a bearing is reduced, the service life of the bearing is greatly prolonged, the controllability of the fan is improved, the shoulder on the pull rod 4 plays a role of supporting the primary impeller 2 and the secondary impeller 3 at the far end, and the primary impeller 2 and the secondary impeller 3 are fixed on the pull rod 4 through the cooperation of the screw cap and the screw rod, so that the problem of overlarge change of the unbalanced position and the unbalanced size influenced by the screw rod after dynamic balance is avoided, the stability of the rotor system is improved, the vibration of the fan is effectively reduced, the stability of the bearing is kept, and the service life of the fan is prolonged.
The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.
Claims (5)
1. The utility model provides a bilobed wheel fan main shaft, includes main shaft (1), its characterized in that: the two ends of the main shaft (1) are provided with a primary impeller (2) and a secondary impeller (3), the main shaft (1) is connected with the primary impeller (2) and the secondary impeller (3) through a pull rod (4), and the pull rod (4) and the main shaft (1) are coaxial;
the pull rod (4) is provided with a shoulder (5) for supporting the primary impeller (2) and the secondary impeller (3), the pull rod (4) is provided with threads, and the screw cap is matched with the threads to fasten the primary impeller (2) and the secondary impeller (3).
2. A twin impeller fan spindle as claimed in claim 1, wherein: the shoulder (5) is arranged at the upper side and the lower side of one end of the pull rod (4) far away from the main shaft (1) and is symmetrically arranged.
3. A twin impeller fan spindle as claimed in claim 1, wherein: the direction of the pull rod (4) close to the primary impeller (2) is a positive rotation thread, and the direction of the pull rod (4) close to the secondary impeller (3) is a negative rotation thread.
4. A twin impeller fan spindle as claimed in claim 1, wherein: the shoulder (5) is positioned on the surface of the thread facing the main shaft (1).
5. A twin impeller fan spindle as claimed in claim 1, wherein: one end, far away from the main shaft (1), of the primary impeller (2) and the secondary impeller (3) is provided with a fairing (6), and the fairing (6) is connected with the primary impeller (2) and the secondary impeller (3) through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321986382.0U CN220522873U (en) | 2023-07-27 | 2023-07-27 | Double-impeller fan main shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321986382.0U CN220522873U (en) | 2023-07-27 | 2023-07-27 | Double-impeller fan main shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220522873U true CN220522873U (en) | 2024-02-23 |
Family
ID=89923812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321986382.0U Active CN220522873U (en) | 2023-07-27 | 2023-07-27 | Double-impeller fan main shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220522873U (en) |
-
2023
- 2023-07-27 CN CN202321986382.0U patent/CN220522873U/en active Active
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| GR01 | Patent grant |