CN213039530U - Zero-leakage centrifugal fan shell - Google Patents
Zero-leakage centrifugal fan shell Download PDFInfo
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- CN213039530U CN213039530U CN202021623298.9U CN202021623298U CN213039530U CN 213039530 U CN213039530 U CN 213039530U CN 202021623298 U CN202021623298 U CN 202021623298U CN 213039530 U CN213039530 U CN 213039530U
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Abstract
The application relates to a zero leakage centrifugal fan shell relates to centrifugal fan's technical field, the fan casing outside is provided with the sealed cowling, the sealed cowling all is led through to the air intake and the air outlet of fan casing. When the gas leaks, the gas flows into the sealing cover, so that the gas is prevented from leaking.
Description
Technical Field
The utility model relates to a centrifugal fan's technical field, in particular to zero leakage centrifugal fan shell.
Background
The centrifugal fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, vehicles, ships and buildings; ventilation and draught of boilers and industrial furnaces; cooling and ventilation in household appliances; wind tunnel wind source and air cushion boat inflation and propulsion.
At present, a centrifugal fan provides power through a motor, so that gas enters from one end and is output from the other end through the inside of the fan, and therefore the gas is discharged.
However, the applicant believes that the related art described above has a case where gas leaks, and there is a room for improvement.
SUMMERY OF THE UTILITY MODEL
In order to improve the condition that there is gas leakage in the centrifugal fan among the correlation technique, this application provides a zero leakage centrifugal fan shell.
The application provides a zero leakage centrifugal fan shell adopts following technical scheme:
the zero-leakage centrifugal fan shell comprises a fan shell body, wherein a sealing cover is arranged on the outer side of the fan shell body, and an air inlet and an air outlet of the fan shell body are both communicated with the sealing cover.
Through adopting above-mentioned technical scheme, when the fan appeared leaking, the sealed cowling that the fan outside set up can prevent gaseous leakage.
Preferably, a cavity is formed between the sealing cover and the fan shell, and the sealing cover is communicated with an air suction source.
Through adopting above-mentioned technical scheme, when the fan appeared leaking, gas flow was during to the cavity that forms between sealed cowling and the fan casing, and the source of induced drafting is taken out the gas in the cavity again to this prevents gas leakage.
Preferably, the air suction source is an air inlet of the fan, and the sealing cover is communicated with the air inlet of the fan shell through a pipeline.
By adopting the technical scheme, the gas flowing into the cavity flows back to the air inlet of the fan through the pressure difference formed between the air inlet of the fan and the sealing cover, so that the gas is prevented from leaking.
Preferably, the air suction source is an air outlet of the fan, and a communicating pipe is communicated between the sealing cover and the fan shell.
Through adopting above-mentioned technical scheme, the gas that flows to in the cavity through the pressure difference that forms between fan air outlet and the sealed cowling for gas flows to the fan air outlet through the intercommunication pipe, with this gas leakage prevention.
Preferably, one side of the communicating pipe close to the air inlet of the fan shell is provided with an anti-backflow pipe, and the anti-backflow pipe and the direction of the air flow direction at the air outlet are arranged in an acute angle.
By adopting the technical scheme, the direction of the gas flow direction at the position of the anti-backflow pipe and the air outlet is an acute angle, so that when the gas in the fan flows out from the outlet and passes through the anti-backflow pipe, the situation that the gas flows back into the sealing cover from the inner wall of the anti-backflow pipe is reduced.
Preferably, the air suction source is a second centrifugal fan, and the sealing cover is communicated with an air inlet of the second centrifugal fan through a pipeline.
Through adopting above-mentioned technical scheme, the gas that flows to in the cavity is taken out the cavity through second centrifuge to this prevents that gas from leaking.
Preferably, the sealing cover comprises a plurality of local sealing covers, any one of the local sealing covers a part of the fan shell correspondingly, a first sealing gasket is arranged between any two adjacent local sealing covers, and any two adjacent local sealing covers are fixed through bolts.
Through adopting above-mentioned technical scheme, all correspond the cover by arbitrary local sealed cowling and establish partial fan casing, and be provided with first sealed pad between arbitrary two adjacent local sealed cowlings, and then increase the sealing performance of arbitrary two adjacent local sealed cowlings, pass through the bolt fastening between arbitrary two adjacent local sealed cowlings for the installation of sealed cowling is more convenient.
Preferably, a second sealing gasket is tightly abutted between the sealing cover and the joint of the fan shell and the sealing cover, and the fan shell and the sealing cover are fixed through bolts.
Through adopting above-mentioned technical scheme, by the second sealed pad that sets up in order to increase the sealing performance of sealed cowling and fan housing, fix fan housing and sealed cowling through the bolt and with the installation of convenient sealed cowling.
Preferably, the inner wall of the sealing cover is paved with sound-absorbing cotton.
Through adopting above-mentioned technical scheme, inhale the sound cotton by what sealed cowling inner wall was laid and fall the noise to centrifugal fan when the operation.
In summary, the present application includes at least one of the following beneficial technical effects:
1. a cavity is formed between the sealing cover and the fan shell, and the sealing cover is communicated with an air suction source. When the fan leaks, the gas flows into a cavity formed between the sealing cover and the fan shell, and the gas in the cavity is pumped out through the air pumping source, so that the gas leakage is prevented;
2. any local sealing cover covers part of the fan shell correspondingly, a first sealing gasket is arranged between any two adjacent local sealing covers, the sealing performance of any two adjacent local sealing covers is further improved, and the two adjacent local sealing covers are fixed through bolts, so that the sealing covers are more convenient to install;
3. the noise reduction is carried out to centrifugal fan when the operation to inhaling that is laid by the sealed cowling inner wall cotton.
Drawings
FIG. 1 is a schematic axial view of a zero-leakage centrifugal fan casing according to one embodiment;
FIG. 2 is a schematic view of a partial cross-section of a housing of a zero-leakage centrifugal fan according to an embodiment;
FIG. 3 is a schematic view of a sealing gasket structure of a housing of a centrifugal fan embodying zero leakage according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a zero-leakage centrifugal fan casing mainly embodying an air intake as an air intake in the present embodiment;
fig. 5 is a schematic structural view of a zero-leakage centrifugal fan casing mainly embodying the air outlet as the air suction source in the second embodiment;
fig. 6 is a schematic structural diagram of a zero-leakage centrifugal fan casing mainly embodying the second centrifugal fan as a suction source in the third embodiment.
Reference numerals: 1. a fan housing; 11. an air inlet; 12. an air outlet; 2. a sealing cover; 21. a communicating pipe; 22. an anti-reflux pipe; 3. sound-absorbing cotton; 4. a first gasket; 5. a second gasket; 6. a second centrifugal fan.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
The embodiment of the application discloses zero leakage centrifugal fan shell.
The first embodiment is as follows:
referring to the attached figure 1, the fan casing comprises a fan casing body 1, a sealing cover 2 is fixed on the outer side of the fan casing body 1, an air inlet 11 and an air outlet 12 of the fan casing body 1 both penetrate through the sealing cover 2, and a cavity is formed between the fan casing body 1 and the sealing cover 2. The sealing cover 2 is communicated with an air suction source.
In actual operation, when gas leaks through fan casing 1, gas flows to the cavity that forms between sealed cowling 2 and fan casing 1, and the source of induced draft is taken out the gas in the cavity again to prevent the leakage of gas.
Referring to fig. 2 and 3, the sealing cap 2 includes a plurality of partial sealing caps 2, and preferably two partial sealing caps 2 are provided in this embodiment. Two local sealed cowlings 2 all correspond the cover and establish partial fan casing 1, are provided with first sealed 4 between two local sealed cowlings 2, and fix through the bolt between two local sealed cowlings 2. The sealing cover 2, the fan shell 1 and the sealing cover 2 are tightly abutted to each other to form a second sealing gasket 5, and the fan shell 1 and the sealing cover 2 are fixed through bolts. The inner wall of the sealing cover 2 is laid with sound-absorbing cotton 3.
In actual work, the first sealing gasket 4 arranged between the two local sealing covers 2 increases the sealing performance between the two local sealing covers 2, and the second sealing gasket 5 tightly arranged between the sealing cover 2 and the joint of the fan shell 1 and the sealing cover 2 increases the sealing performance between the sealing gasket and the fan shell 1. Then two local sealed cowlings 2, fan casing 1 and sealed cowling 2 both pass through the bolt fastening to make things convenient for the installation of sealed cowling 2. Then, noise reduction is carried out on the centrifugal fan in the running process through the sound-absorbing cotton 3 paved on the inner wall of the sealing cover 2.
Referring to fig. 4, the air suction source is an air inlet 11 of the fan, and the sealing cover 2 is communicated with the air inlet 11 of the fan housing 1 through a pipeline.
In actual operation, a pipeline communicated with the sealing cover 2 is arranged at the air inlet 11 of the fan. When the air leaks through the fan shell 1, the air flows into the cavity, the air flows back to the fan air inlet 11 through the pressure difference formed between the fan air inlet 11 and the sealing cover 2, and then the air is discharged through the fan, so that the air leakage is prevented.
Example two:
the difference from the first embodiment is that: referring to fig. 5, the air outlet 12 of the fan is used as the air suction source, a communication pipe 21 is communicated between the sealing cover 2 and the fan housing 1, one side of the communication pipe 21 close to the air inlet 11 of the fan housing 1 is provided with an anti-backflow pipe 22, and the anti-backflow pipe 22 and the air outlet 12 are arranged in an acute angle.
In practical operation, a backflow resisting pipe 22 communicated with the sealing cover 2 is arranged at the air outlet 12 of the fan. When the air leaks through the fan housing 1, the air flows into the cavity, and the air flows to the fan outlet 12 through the anti-backflow pipe 22 by the pressure difference formed between the fan outlet 12 and the sealing cover 2, so as to prevent the air from leaking. Then, the anti-backflow pipe 22 forms an acute angle with the direction of the gas flow at the air outlet 12, so that when the gas in the fan flows out from the outlet and passes through the anti-backflow pipe 22, the gas is prevented from flowing back into the sealing cover 2 due to the blocking of the inner wall of the anti-backflow pipe 22.
Example three:
the difference from the first embodiment is that: referring to fig. 6, the air suction source is a second centrifugal fan 6, and the sealing cover 2 is communicated with an air inlet of the second centrifugal fan 6 through a pipeline.
In actual operation, the sealing cover 2 is communicated with the air inlet 11 of the second centrifuge through a pipeline. When gas leaks through the fan housing 1, it flows into the cavity and is then discharged through the second centrifugal fan 6 to prevent gas leakage.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. The utility model provides a zero leaks centrifugal fan shell, includes fan casing (1), its characterized in that: a sealing cover (2) is arranged on the outer side of the fan shell (1), and an air inlet (11) and an air outlet (12) of the fan shell (1) are both communicated with the sealing cover (2).
2. The zero-leakage centrifugal fan casing of claim 1, wherein: a cavity is formed between the sealing cover (2) and the fan shell (1), and the sealing cover (2) is communicated with an air suction source.
3. The zero-leakage centrifugal fan casing of claim 2, wherein: the air suction source is an air inlet (11) of the fan, and the sealing cover (2) is communicated with the air inlet (11) of the fan shell (1) through a pipeline.
4. The zero-leakage centrifugal fan casing of claim 2, wherein: the air suction source is an air outlet (12) of the fan, and a communicating pipe (21) is communicated between the sealing cover (2) and the fan shell (1).
5. The zero-leakage centrifugal fan casing of claim 4, wherein: one side of the communicating pipe (21) close to the air inlet (11) of the fan shell (1) is provided with a backflow resisting pipe (22), and the backflow resisting pipe (22) and the air outlet (12) are arranged in an acute angle in the direction of the air flow direction.
6. The zero-leakage centrifugal fan casing of claim 2, wherein: the air suction source is a second centrifugal fan (6), and the sealing cover (2) is communicated with an air inlet of the second centrifugal fan (6) through a pipeline.
7. The zero-leakage centrifugal fan casing of claim 1, wherein: the sealing cover (2) comprises a plurality of local sealing covers, any one of the local sealing covers a part of the fan shell (1), a first sealing gasket (4) is arranged between any two adjacent local sealing covers, and the two adjacent local sealing covers are fixed through bolts.
8. The zero-leakage centrifugal fan casing of claim 1, wherein: the sealing cover (2), the fan shell (1) and the sealing cover (2) are tightly abutted to each other to form a second sealing gasket (5), and the fan shell (1) and the sealing cover (2) are fixed through bolts.
9. The zero-leakage centrifugal fan casing of claim 1, wherein: the inner wall of the sealing cover (2) is laid with sound-absorbing cotton (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021623298.9U CN213039530U (en) | 2020-08-06 | 2020-08-06 | Zero-leakage centrifugal fan shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021623298.9U CN213039530U (en) | 2020-08-06 | 2020-08-06 | Zero-leakage centrifugal fan shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213039530U true CN213039530U (en) | 2021-04-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021623298.9U Active CN213039530U (en) | 2020-08-06 | 2020-08-06 | Zero-leakage centrifugal fan shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213039530U (en) |
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2020
- 2020-08-06 CN CN202021623298.9U patent/CN213039530U/en active Active
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