CN213981245U - Centrifugal fan with airtight ring - Google Patents
Centrifugal fan with airtight ring Download PDFInfo
- Publication number
- CN213981245U CN213981245U CN202022742586.2U CN202022742586U CN213981245U CN 213981245 U CN213981245 U CN 213981245U CN 202022742586 U CN202022742586 U CN 202022742586U CN 213981245 U CN213981245 U CN 213981245U
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- China
- Prior art keywords
- fan
- gear
- air
- driving shaft
- sleeve block
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- Expired - Fee Related
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- 241000886569 Cyprogenia stegaria Species 0.000 claims description 33
- 238000007789 sealing Methods 0.000 claims description 32
- 210000003437 trachea Anatomy 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a centrifugal fan with airtight ring, including the fan casing, the fan casing internal rotation is inserted and is equipped with first drive shaft, four hack levers that are the rectangle and distribute, four of fan casing left side fixedly connected with the hack lever is kept away from the common fixed connection mounting panel of one end of fan casing, fixed mounting has driving motor on the mounting panel left surface, the left end of first drive shaft is rotated and is run through fan casing left side wall and with driving motor's output fixed connection, fixedly connected with seal sleeve piece on the fan casing left side wall, seal sleeve piece cover is established in first drive shaft, be equipped with the labyrinth seal ring between seal sleeve piece inner wall and the first drive shaft, just annular airtight groove has been seted up at labyrinth seal ring left side position on the seal sleeve piece inner wall. The utility model discloses effectively improved centrifugal fan's gas tightness, formed the airtight ring through the high-speed air current that flows, and simple structure, the cost is lower, facilitate promotion.
Description
Technical Field
The utility model relates to a gas conveying equipment technical field especially relates to a centrifugal fan with airtight ring.
Background
When the centrifugal fan is applied to various occasions, such as the fields of chemical engineering, pharmacy, electroplating and the like, for conveying corrosive gas, the centrifugal fan is particularly required to have better corrosion resistance. Generally, the working principle of the fan during conveying of corrosive gas is that air is fed into the front air inlet and blown out from the upper side or the side surface, and because the impeller generates large internal pressure during operation, the gas is output from the air outlet. Certain gas leaks backwards from a gap between the connecting shaft of the impeller and the casing, the leaked gas inevitably causes corrosion of the motor and the iron frame, and meanwhile, the leaked gas can also pollute the environment and bring harm to the human body. In order to enhance the air tightness of the centrifugal fan, labyrinth seal is generally adopted to seal between the motor output shaft and the casing in the prior art, but the problems of poor tightness and large leakage of the labyrinth sealed centrifugal fan are discovered during use, and the existing production and use requirements cannot be met. We have therefore proposed a centrifugal fan provided with an airtight ring to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a centrifugal fan with an airtight ring.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a centrifugal fan with an airtight ring comprises a fan shell, wherein a first driving shaft is inserted in the fan shell in a rotating mode, the left side of the fan shell is fixedly connected with four rack rods which are distributed in a rectangular mode, one ends, far away from the fan shell, of the four rack rods are fixedly connected with a mounting plate together, a driving motor is fixedly mounted on the left side face of the mounting plate, the left end of the first driving shaft rotatably penetrates through the left side wall of the fan shell and is fixedly connected with the output end of the driving motor, a sealing sleeve block is fixedly connected to the left side wall of the fan shell and is sleeved on the first driving shaft, a labyrinth sealing ring is arranged between the inner wall of the sealing sleeve block and the first driving shaft, an annular airtight groove is formed in the left side position of the labyrinth sealing ring in the inner wall of the sealing sleeve block, small fans are fixedly mounted on the two rack rods below together, and the air outlet ends of, one end, far away from the small fan, of the gas pipe penetrates through the lower end of the sealing sleeve block and is communicated with the lower end of the annular airtight groove, the upper end of the annular airtight groove is communicated with an L-shaped gas pipe, and one end, far away from the annular airtight groove, of the L-shaped gas pipe penetrates through the left side wall of the fan shell and is communicated with the position, close to the inner center, of the fan shell.
Preferably, the fixed cover in sealed nest block left side on the first drive shaft has connect first gear, the meshing of first gear lower extreme has the second gear, the second gear rotates to be connected on the mounting panel right side, the meshing of second gear lower extreme has the third gear, third gear central point puts the fixed second drive shaft that is equipped with of inserting, the left end and the mounting panel right side of second drive shaft rotate the output shaft fixed connection of being connected, left end and small-size fan.
Preferably, the air inlet end of the small fan is provided with a filter screen.
Preferably, an air inlet is formed in the right side of the fan shell, and an air inlet pipeline is communicated with the air inlet in a sealing mode.
Preferably, an air outlet is formed in the lower portion of the rear side of the fan shell.
Preferably, an impeller is fixedly sleeved on the first driving shaft and in the fan shell.
The utility model has the advantages that: the air tightness of the centrifugal fan is effectively improved, the air-tight ring is formed by high-speed flowing air flow, and the centrifugal fan is simple in structure, low in cost and convenient to popularize.
Drawings
Fig. 1 is a front perspective view of a centrifugal fan provided with an airtight ring according to the present invention;
fig. 2 is an enlarged schematic structural view at B in fig. 1.
In the figure: the air inlet device comprises a fan shell 1, a first driving shaft 2, an impeller 3, a frame rod 4, a mounting plate 5, a driving motor 6, a sealing sleeve block 7, a labyrinth sealing ring 8, an annular air-tight groove 9, a small fan 10, a first gear 11, a second gear 12, a third gear 13, a second driving shaft 14, an L-shaped air pipe 15, a filter screen 16 and an air inlet pipeline 17.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1-2, a centrifugal fan with an airtight ring comprises a fan shell 1, a first driving shaft 2 is rotatably inserted in the fan shell 1, four rectangular frame rods 4 are fixedly connected to the left side of the fan shell 1, one end of each frame rod 4 away from the fan shell 1 is fixedly connected to a mounting plate 5, a driving motor 6 is fixedly mounted on the left side surface of the mounting plate 5, the left end of the first driving shaft 2 rotatably penetrates through the left side wall of the fan shell 1 and is fixedly connected with the output end of the driving motor 6, a sealing sleeve block 7 is fixedly connected to the left side wall of the fan shell 1, the sealing sleeve block 7 is sleeved on the first driving shaft 2, a labyrinth sealing ring 8 is arranged between the inner wall of the sealing sleeve block 7 and the first driving shaft 2 (the labyrinth sealing ring 8 is in the prior art and has certain air tightness), an annular airtight groove 9 is formed in the inner wall of the sealing sleeve block 7 and at the left side position of the labyrinth sealing ring 8, be located common fixed mounting on two hack levers 4 in below and have small-size fan 10, the air-out end intercommunication of small-size fan 10 has the gas-supply pipe, the one end that small-size fan 10 was kept away from to the gas-supply pipe runs through sealed cover 7 lower extreme and communicates with the lower extreme of annular airtight groove 9, the upper end intercommunication of annular airtight groove 9 has L shape trachea 15, the one end that L shape trachea 15 was kept away from to change annular airtight groove 9 runs through fan casing 1 left side wall and communicates with fan casing 1 near the position of inside center, when small-size fan 10 worked, can carry outside air into annular airtight groove 9, and carry back fan casing 1 through L shape trachea 15, form the airtight ring in annular airtight groove 9 under the fast-speed flow of air current, effectively prevent the inside gas of fan casing 1 from leaking.
The first gear 11 is fixedly sleeved on the first driving shaft 2 on the left side of the sealing sleeve block 7, the lower end of the first gear 11 is meshed with the second gear 12, the second gear 12 is rotatably connected to the right side of the mounting plate 5, the lower end of the second gear 12 is meshed with the third gear 13, the second driving shaft 14 is fixedly inserted in the center of the third gear 13, the left end of the second driving shaft 14 is rotatably connected with the right side of the mounting plate 5, and is fixedly connected with the output shaft of the small fan 10, when the driving motor 6 drives the first driving shaft 2 to rotate, the second driving shaft 14 can be driven to work by the meshing transmission of the first gear 11, the second gear 12 and the third gear 13, and the manufacturing cost is saved.
The air inlet end of the small fan 10 is provided with a filter screen 16 for placing outside dust.
An air inlet is formed in the right side of the fan shell 1, the air inlet is communicated with an air inlet pipeline 17 in a sealing mode and used for conveying harmful gas or corrosive gas, and an air outlet is formed in the lower portion of the rear side of the fan shell 1 and used for discharging the gas.
On the first drive shaft 2 and at fan casing 1 internal fixation cup joint impeller 3, when impeller 3 rotated, the centrifugal motor began work, transported harmful gas or corrosive gas's work.
When the utility model is used, the first driving shaft 2 is driven to rotate by the driving motor 6, then the impeller 3 is driven to rotate, so that the air inlet generates suction, toxic or corrosive gas in the air inlet pipeline 17 is sucked and is conveyed out through the air outlet, in the working process, the first gear 11 on the first driving shaft 2 rotates, the second driving shaft 14 is driven to rotate by the second gear 12 and the third gear 13, then the small fan 10 is driven to work, so that the small fan 10 sucks gas from the air and conveys the gas into the annular airtight groove 9, and the gas is conveyed to the central position of the fan shell 1 through the L-shaped air pipe 15, as the air pressure at the position which is closer to the axis of the impeller 3 is smaller when the impeller 3 rotates, the gas shell in the L-shaped air pipe 15 is input into the fan shell 1 at high speed, the gas in the annular airtight groove 9 also flows at high speed, and the airtight ring of high-speed flowing gas flow is formed, and then, the harmful gas flow in the fan shell 1 can be effectively prevented from leaking, and the harmful gas can be conveyed back into the fan shell 1 together, and the sealing effect is further enhanced under the advanced sealing of the labyrinth sealing ring 8.
Claims (6)
1. A centrifugal fan with an air tight ring comprises a fan shell (1) and is characterized in that a first driving shaft (2) is inserted into the fan shell (1) in a rotating mode, the left side of the fan shell (1) is fixedly connected with four rack rods (4) which are distributed in a rectangular mode, one ends, far away from the fan shell (1), of the four rack rods (4) are fixedly connected with a mounting plate (5) together, a driving motor (6) is fixedly mounted on the left side face of the mounting plate (5), the left end of the first driving shaft (2) rotates to penetrate through the left side wall of the fan shell (1) and is fixedly connected with the output end of the driving motor (6), a sealing sleeve block (7) is fixedly connected onto the left side wall of the fan shell (1), the sealing sleeve block (7) is sleeved on the first driving shaft (2), a labyrinth sealing ring (8) is arranged between the inner wall of the sealing sleeve block (7) and the first driving shaft (2), the sealing device is characterized in that an annular airtight groove (9) is formed in the inner wall of the sealing sleeve block (7) and in the left side position of the labyrinth sealing ring (8), the sealing sleeve block is located two below the inner wall of the frame rod (4), a small fan (10) is fixedly mounted on the frame rod (4) together, an air outlet end of the small fan (10) is communicated with an air pipe, one end, far away from the small fan (10), of the air pipe penetrates through the lower end of the sealing sleeve block (7) and is communicated with the lower end of the annular airtight groove (9), an L-shaped air pipe (15) is communicated with the upper end of the annular airtight groove (9), one end, far away from the annular airtight groove (9), of the L-shaped air pipe (15) penetrates through the left side wall of the fan shell (1) and is communicated with the position, close to the inner center, of the fan shell (1).
2. The centrifugal fan with the airtight ring is characterized in that a first gear (11) is fixedly sleeved on the first driving shaft (2) and on the left side of the sealing sleeve block (7), a second gear (12) is meshed at the lower end of the first gear (11), the second gear (12) is rotatably connected to the right side of the mounting plate (5), a third gear (13) is meshed at the lower end of the second gear (12), a second driving shaft (14) is fixedly inserted in the center of the third gear (13), the left end of the second driving shaft (14) is rotatably connected to the right side of the mounting plate (5), and the left end of the second driving shaft is fixedly connected to an output shaft of the small fan (10).
3. Centrifugal fan provided with an airtight ring according to claim 1, characterized in that the inlet end of said mini-fan (10) is provided with a sieve (16).
4. The centrifugal fan with the air-tight ring is characterized in that an air inlet is formed in the right side of the fan shell (1), and an air inlet pipeline (17) is communicated with the air inlet in a sealing mode.
5. Centrifugal fan provided with an air-tight ring according to claim 1, characterized in that the fan housing (1) has air outlets at the lower rear side.
6. A centrifugal fan provided with an air-tight ring according to claim 1, characterized in that an impeller (3) is fixedly secured to the first drive shaft (2) and within the fan housing (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022742586.2U CN213981245U (en) | 2020-11-24 | 2020-11-24 | Centrifugal fan with airtight ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022742586.2U CN213981245U (en) | 2020-11-24 | 2020-11-24 | Centrifugal fan with airtight ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213981245U true CN213981245U (en) | 2021-08-17 |
Family
ID=77266039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022742586.2U Expired - Fee Related CN213981245U (en) | 2020-11-24 | 2020-11-24 | Centrifugal fan with airtight ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213981245U (en) |
-
2020
- 2020-11-24 CN CN202022742586.2U patent/CN213981245U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211213 Address after: 224000 southeast industrial concentration zone, Yandong Town, Tinghu District, Yancheng City, Jiangsu Province (19) Patentee after: Jiangsu leichen Environmental Protection Technology Co.,Ltd. Address before: 224333 north side of Huanghai East Road, Huangjian Town, Tinghu District, Yancheng City, Jiangsu Province Patentee before: Jiangsu Huaqiang Fan Manufacturing Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210817 |