CN211950951U - Shaft seal device of centrifugal fan - Google Patents
Shaft seal device of centrifugal fan Download PDFInfo
- Publication number
- CN211950951U CN211950951U CN202020422534.4U CN202020422534U CN211950951U CN 211950951 U CN211950951 U CN 211950951U CN 202020422534 U CN202020422534 U CN 202020422534U CN 211950951 U CN211950951 U CN 211950951U
- Authority
- CN
- China
- Prior art keywords
- centrifugal fan
- shaft seal
- fan
- butterfly valve
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000005192 partition Methods 0.000 claims description 21
- 239000000565 sealant Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims 1
- 241000886569 Cyprogenia stegaria Species 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000012856 packing Methods 0.000 abstract description 3
- 239000000428 dust Substances 0.000 abstract description 2
- 238000004026 adhesive bonding Methods 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000003466 welding Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Abstract
A shaft seal device of a centrifugal fan. A gap exists between a centrifugal fan shaft and a fan shell, and in order to prevent the gap from leaking, a packing seal or a mechanical seal device is added in the traditional method, the mode has no automatic adjusting capacity, and after a fan is heated and expanded, the seal gap is increased, so that dust leakage and air leakage at the shaft end of the fan are serious. The utility model discloses the constitution includes: centrifugal fan, install bearing seal compartment (5) between centrifugal fan (3) and bearing box (2), bearing seal compartment one end welding is on centrifugal fan's casing, the other end passes through sealed clearance with the bearing room of gluing, the bearing seal compartment is the box structure, its inside fan axle that has centrifugal fan that wears, bearing seal compartment one side and tube coupling, and make the cavity and the pipeline of bearing seal compartment communicate with each other, the pipeline top is connected with boiler flue (4), install entry manual butterfly valve (8) on the pipeline in proper order, export manual butterfly valve (6), put grey manual butterfly valve (7). The utility model is used for centrifugal fan shaft seal device.
Description
The technical field is as follows:
the utility model relates to an electric power system technical field, concretely relates to centrifugal fan shaft seal device.
Background art:
a gap exists between a centrifugal fan shaft and a fan shell of an electric power system boiler in the prior art, and in order to prevent the gap from leaking, a packing seal or a mechanical seal device is added in the traditional method, the traditional packing seal, the mechanical seal and other sealing modes do not have automatic adjusting capacity, after a fan is heated and expanded, the sealing gap is increased, the sealing effect is reduced, and the dust leakage and the air leakage at the shaft end of the fan are serious.
The utility model has the following contents:
the utility model aims at providing a centrifugal fan axle head sealing device solves the problem that centrifugal fan axle head leaks grey, leaks out.
The above purpose is realized by the following technical scheme:
a centrifugal fan shaft seal device comprises the following components: the centrifugal fan comprises a centrifugal fan body, a shaft seal partition is arranged between the centrifugal fan body and a bearing box, one end of the shaft seal partition is welded on a shell of the centrifugal fan body, the other end of the shaft seal partition is sealed with a gap of a bearing chamber through sealant, the shaft seal partition is of a box-shaped structure, a fan shaft of the centrifugal fan penetrates through the shaft seal partition, one side of the shaft seal partition is connected with a pipeline, a cavity of the shaft seal partition is communicated with the pipeline, the upper portion of the pipeline is connected with a boiler flue, and an inlet manual butterfly valve, an outlet manual butterfly valve and an ash discharge manual butterfly valve are sequentially arranged on the pipeline.
The centrifugal fan shaft seal device is characterized in that the bearing box is connected with the motor through a coupler, the bearing box and the motor are respectively fixed on the upper plane of the frame body through bolts, the manual butterfly valve for ash discharge is arranged at the bottom of the pipeline, the manual butterfly valve for inlet is arranged above the pipeline, and the manual butterfly valve for outlet is arranged above the shaft seal compartment.
Has the advantages that:
1. the utility model relates to a centrifugal fan shaft seal device, this structure has effectively solved the fan because of the sealed effect decline of thermal expansion axle end causes leak grey, the problem of leaking out.
One end of the shaft seal compartment of the utility model is welded on the shell of the centrifugal fan, the other end seals the gap between the bearing chamber and the shaft seal compartment through sealant, the structure is simple, the manufacture is convenient, the maintenance is convenient, the manual butterfly valve for the outlet and the inlet is opened during the operation, the manual butterfly valve for ash discharge is closed, the ash leakage and the air leakage of the shaft end of the fan are absorbed through the negative pressure (about-3 Kpa) in the boiler flue, the sealing effect is achieved,
3. the utility model discloses a structure does not receive the influence of fan operating condition, all has good sealed effect under the full operating mode, make full use of the negative pressure characteristic in scene wind channel, all retrieve the system of advancing of medium that will leak, avoided environmental pollution and artifical year to clean the cost.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the device comprises a motor, 2, a bearing box, 3, a centrifugal fan, 4, a boiler flue, 5, a shaft seal compartment, 6, an outlet manual butterfly valve, 7, an ash discharge manual butterfly valve and 8, an inlet manual butterfly valve.
The specific implementation mode is as follows:
example 1:
a centrifugal fan shaft seal device comprises the following components: the centrifugal fan comprises a centrifugal fan 3, a shaft seal partition 5 is installed between the centrifugal fan and a bearing box 2, one end of the shaft seal partition is welded on a shell of the centrifugal fan, the other end of the shaft seal partition is sealed with a gap of a bearing chamber through sealant, the shaft seal partition is of a box-shaped structure, a fan shaft of the centrifugal fan penetrates through the shaft seal partition, one side of the shaft seal partition is connected with a pipeline, a cavity of the shaft seal partition is communicated with the pipeline, the upper portion of the pipeline is connected with a boiler flue 4, and an inlet manual butterfly valve 8, an outlet manual butterfly valve 6 and an ash discharge manual butterfly valve 7 are sequentially installed on the pipeline.
Example 2:
according to the centrifugal fan shaft seal device in embodiment 1, the bearing box is connected with the motor 1 through the coupler, the bearing box and the motor are respectively fixed on the upper plane of the frame body through bolts, the manual ash discharge butterfly valve is arranged at the bottom of the pipeline, the manual inlet butterfly valve is arranged above the pipeline, and the manual outlet butterfly valve is arranged above the shaft seal compartment.
According to the method, a shaft seal compartment is additionally arranged at a gap between a fan bearing box and a fan shell, the shaft end of a fan is covered in the shaft seal compartment, a micro-positive pressure environment is formed in the shaft seal compartment, the fan compartment is connected with an outlet boiler flue of an air preheater through a conveying pipeline, an outlet manual butterfly valve and an inlet manual butterfly valve are opened during operation, an ash discharge manual butterfly valve is closed, and the shaft end of the fan leaks ash and air through negative pressure (about-3 Kpa) in the boiler flue, so that the sealing effect is achieved; sealing the leakage medium in the fixed cavity through the shaft seal compartment, and sucking the medium in the shaft seal compartment away through a conveying pipeline by using the negative pressure of a boiler flue;
the scheme is adopted when the air preheater of a certain power plant prevents the ash leakage fan from ash leakage treatment, the ash leakage problem is solved after the shaft end of the fan is transformed, the fan has no ash leakage problem, the anti-ash leakage fan stably operates all the time, and the anti-ash leakage effect is better.
Claims (2)
1. A centrifugal fan shaft seal device comprises the following components: centrifugal fan, characterized by: the centrifugal fan is characterized in that a shaft seal partition is arranged between the centrifugal fan and the bearing box, one end of the shaft seal partition is welded on a shell of the centrifugal fan, the other end of the shaft seal partition is sealed with a gap of the bearing chamber through sealant, the shaft seal partition is of a box-shaped structure, a fan shaft of the centrifugal fan penetrates through the shaft seal partition, one side of the shaft seal partition is connected with a pipeline, a cavity of the shaft seal partition is communicated with the pipeline, the upper part of the pipeline is connected with a boiler flue, and an inlet manual butterfly valve, an outlet manual butterfly valve and an ash discharge manual butterfly valve are sequentially arranged on the pipeline.
2. The axial seal device for a centrifugal fan according to claim 1, wherein: the bearing box is connected with the motor through a coupler, the bearing box and the motor are respectively fixed on the upper plane of the frame body through bolts, the manual ash-discharging butterfly valve is arranged at the bottom of the pipeline, the manual inlet butterfly valve is arranged above the pipeline, and the manual outlet butterfly valve is arranged above the shaft seal compartment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020422534.4U CN211950951U (en) | 2020-03-29 | 2020-03-29 | Shaft seal device of centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020422534.4U CN211950951U (en) | 2020-03-29 | 2020-03-29 | Shaft seal device of centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211950951U true CN211950951U (en) | 2020-11-17 |
Family
ID=73186718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020422534.4U Expired - Fee Related CN211950951U (en) | 2020-03-29 | 2020-03-29 | Shaft seal device of centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211950951U (en) |
-
2020
- 2020-03-29 CN CN202020422534.4U patent/CN211950951U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201117 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |