CN216361070U - Sealing device for fan shaft hole - Google Patents
Sealing device for fan shaft hole Download PDFInfo
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- CN216361070U CN216361070U CN202122871769.9U CN202122871769U CN216361070U CN 216361070 U CN216361070 U CN 216361070U CN 202122871769 U CN202122871769 U CN 202122871769U CN 216361070 U CN216361070 U CN 216361070U
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- fan
- flange
- annular flanges
- transmission shaft
- hole
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Abstract
A sealing device for a fan shaft hole comprises a fan shell, wherein a driving motor is installed on one side of the fan shell, a transmission shaft is arranged on the driving motor, a fixing flange is installed on the fan shell, and through holes are formed in the fixing flange and the fan shell; the transmission shaft penetrates into the fan shell from the through hole, and a mounting gap is reserved between the outer surface of the transmission shaft and the through hole; a rotating flange is sleeved on the transmission shaft; the surface of the fixed flange is provided with a plurality of first annular flanges at the periphery of the through hole, the surface of the rotating flange is provided with a plurality of second annular flanges, and the first annular flanges and the second annular flanges are meshed with each other to form a labyrinth seal structure. Compared with the prior art, the sealing device for the fan shaft hole is provided with a multi-loop seal through a labyrinth structure, and meanwhile, the flange of the rotating flange is provided with the groove, so that a vortex is generated by the rotation of the groove, the pressure in the fan is balanced, and the overflow of waste gas is further prevented.
Description
Technical Field
The utility model relates to the technical field of fans, in particular to a sealing device for a fan shaft hole.
Background
In the manufacturing industry of insulating plates and copper-clad plates, reinforcing materials (such as glass fiber cloth, wood pulp paper, carbon fiber or cotton cloth and the like) need to be soaked with resin, then the resin is dried to form a prepreg, and finally the prepreg is solidified and shaped at high temperature and high pressure to finally form a product; in order to ensure the permeability of materials in the resin coating process, organic solvents such as methanol and acetone need to be added to adjust the viscosity, the solvents do not participate in the reaction, all the solvents are discharged in the drying process and enter the waste gas incinerator for pyrolysis after being collected, the waste gas fan is collection and conveying equipment in the process, the temperature of the conveyed organic waste gas is 120-150 ℃, no impurity particles exist, but peculiar smell exists, if the pipeline is not tightly sealed or the fan leaks due to the structural problem, the problem of surrounding environment pollution can be caused, and the actual production process needs to be controlled.
At present, in the operation process of a direct-fired waste gas incinerator, a waste gas fan is used as waste gas collecting and conveying equipment, the wind pressure is 2800-3600 Pa, the wind rate is over 35000 wind rate, the machine number is over 10 fans, and the leakage of a pipeline can be avoided by measures such as sealing gaskets, welding and the like; however, in the shaft hole between the main shaft of the fan and the fan casing, because the temperature change of the conveying medium is considered, a gap is usually left in the fan manufacturer to avoid the interference between the deformation of the fan casing and the main shaft of the fan during temperature rise, and because the pressure inside the fan casing is positive during the work of the fan, waste gas is easy to overflow and leak from the shaft hole gap, the time is long, volatile matter is agglomerated at the position, and the leaked waste gas causes the pollution of the surrounding environment, so that the joint of the main shaft of the fan and the fan casing needs to be controlled, the leakage is checked and repaired, and the waste gas is prevented from overflowing.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a sealing device for a fan shaft hole aiming at the defects of the prior art.
In order to solve the technical problems, the utility model adopts the technical scheme that:
a sealing device for a fan shaft hole comprises a fan shell, wherein a driving motor is installed on one side of the fan shell, a transmission shaft is arranged on the driving motor, a fixing flange is installed on the fan shell, and through holes are formed in the fixing flange and the fan shell; the transmission shaft penetrates into the fan shell from the through hole, and a mounting gap is reserved between the outer surface of the transmission shaft and the through hole; a rotating flange is sleeved on the transmission shaft; the surface of the fixed flange is provided with a plurality of first annular flanges at the periphery of the through hole, the surface of the rotating flange is provided with a plurality of second annular flanges, and the first annular flanges and the second annular flanges are meshed with each other to form a labyrinth seal structure.
Furthermore, the surface of the fixed flange is provided with two rings of annular flanges I; and the surface of the rotating flange is provided with three circles of annular flanges II.
Furthermore, the annular flange II in the middle of the rotating flange is provided with slots at intervals.
Furthermore, a sealing gasket is arranged between the fixing flange and the surface of the fan shell.
Furthermore, a positioning ring is integrally connected to one side, away from the annular flange, of the rotating flange, and the positioning ring is fixed with the transmission shaft through a set screw.
Compared with the prior art, the sealing device for the fan shaft hole is provided with a multi-loop seal through a labyrinth structure, and meanwhile, the flange of the rotating flange is provided with the groove, so that a vortex is generated by the rotation of the groove, the pressure in the fan is balanced, and the overflow of waste gas is further prevented.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view taken at FIG. 1A;
FIG. 3 is a schematic structural view of a mounting flange of the present invention;
FIG. 4 is a schematic view of the construction of the rotating flange of the present invention;
the fan comprises a fan shell 1, a fan shell 2, a driving motor 3, a transmission shaft 4, a fixed flange 5, an installation gap 6, a rotating flange 7, a first annular flange 8, a second annular flange 9, a sealing gasket 10, a positioning ring 11, a set screw 12 and a groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below.
As shown in fig. 1 to 4, a sealing device for a fan shaft hole comprises a fan shell 1, wherein a driving motor 2 is installed on one side of the fan shell 1, a transmission shaft 3 is arranged on the driving motor 2, a fixing flange 4 is installed on the fan shell 1, and through holes are formed in the fixing flange 4 and the fan shell 1; the transmission shaft 3 penetrates into the fan shell 1 from the through hole, and a mounting gap 5 is reserved between the outer surface of the transmission shaft 3 and the through hole; in general, considering thermal deformation factors, in order to prevent interference between a transmission shaft and a fan shell, a mounting gap of 2-5 mm is usually reserved, because the working temperature of the exhaust gas fan is about 140 ℃, the size of the gap is 4mm, the gap causes that gas in a shell leaks to the outside through the mounting gap under the condition of positive pressure when the fan works, and in order to prevent exhaust gas leakage, a rotating flange 6 is sleeved on the transmission shaft 3; a plurality of first annular flanges 7 are arranged on the periphery of the through hole on the surface of the fixed flange 4, a plurality of second annular flanges 8 are arranged on the surface of the rotating flange 6, and the first annular flanges 7 and the second annular flanges 8 are meshed with each other to form a labyrinth seal structure; and a sealing gasket 9 is arranged between the fixed flange 4 and the surface of the fan shell 1.
In this embodiment, the surface of the fixed flange 4 is provided with two rings of first annular flanges 7, the surface of the rotating flange 6 is provided with three rings of second annular flanges 8, one side of the rotating flange 6, which is far away from the second annular flanges 8, is integrally connected with a positioning ring 10, the position of the rotating flange 6 on the rotating shaft 3 is adjusted, and the positioning ring 10 is fixed with the transmission shaft 3 through a set screw 11, so that the second annular flanges 8 on the surface of the rotating flange 6 and the first annular flanges 7 are mutually meshed to form a labyrinth seal structure, and a first-level sealing effect is achieved.
In order to further improve the sealing performance of the fixed flange 4 and the rotating flange 6, the annular flange II 8 in the middle of the rotating flange 6 is provided with the slots 12 at intervals, when the transmission shaft 3 rotates, the rotating flange 6 arranged on the transmission shaft 3 rotates along with the rotating flange, the slots 12 in the rotating flange 6 have a cutting effect on the leaked waste gas to form a vortex effect, and the gas of the part of the vortex effect can form pressure to offset the wind pressure in the fan shell 1, so that the leakage of the gas is further eliminated, and the sealing effect is improved.
The present invention is not limited to the embodiments described above, and those skilled in the art may make modifications or changes within the scope of the disclosure without departing from the spirit of the present invention, so that the scope of the present invention is defined by the appended claims.
Claims (5)
1. Fan shaft hole department sealing device, including fan casing, drive motor is installed to fan casing one side, and drive motor is last to be provided with transmission shaft, its characterized in that: the fan shell is provided with a fixed flange, and through holes are formed in the fixed flange and the fan shell; the transmission shaft penetrates into the fan shell from the through hole, and a mounting gap is reserved between the outer surface of the transmission shaft and the through hole; a rotating flange is sleeved on the transmission shaft; the surface of the fixed flange is provided with a plurality of first annular flanges at the periphery of the through hole, the surface of the rotating flange is provided with a plurality of second annular flanges, and the first annular flanges and the second annular flanges are meshed with each other to form a labyrinth seal structure.
2. A fan journal hole seal as claimed in claim 1, wherein: the surface of the fixed flange is provided with two rings of annular flanges I; and the surface of the rotating flange is provided with three circles of annular flanges II.
3. A fan journal hole seal as claimed in claim 2, wherein: and the annular flange II in the middle of the rotating flange is provided with slots at intervals.
4. A fan journal hole seal as claimed in claim 1, wherein: and a sealing gasket is arranged between the fixed flange and the surface of the fan shell.
5. A fan journal hole seal as claimed in claim 1, wherein: and one side of the rotating flange, which is far away from the two annular flanges, is integrally connected with a positioning ring, and the positioning ring is fixed with the transmission shaft through a set screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122871769.9U CN216361070U (en) | 2021-11-22 | 2021-11-22 | Sealing device for fan shaft hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122871769.9U CN216361070U (en) | 2021-11-22 | 2021-11-22 | Sealing device for fan shaft hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216361070U true CN216361070U (en) | 2022-04-22 |
Family
ID=81191561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122871769.9U Active CN216361070U (en) | 2021-11-22 | 2021-11-22 | Sealing device for fan shaft hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216361070U (en) |
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2021
- 2021-11-22 CN CN202122871769.9U patent/CN216361070U/en active Active
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