CN216554484U - Floating ring shaft sealing structure of multistage centrifugal fan - Google Patents
Floating ring shaft sealing structure of multistage centrifugal fan Download PDFInfo
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- CN216554484U CN216554484U CN202122851478.3U CN202122851478U CN216554484U CN 216554484 U CN216554484 U CN 216554484U CN 202122851478 U CN202122851478 U CN 202122851478U CN 216554484 U CN216554484 U CN 216554484U
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- shell
- air inlet
- impeller
- sealing mechanism
- centrifugal fan
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Abstract
The utility model discloses a floating ring shaft sealing structure of a multistage centrifugal fan, which comprises an air inlet shell and an air outlet shell, wherein bases are arranged at the bottoms of the air inlet shell and the air outlet shell, a bearing seat A and a bearing seat B are respectively arranged in the air inlet shell and the air outlet shell, main shafts are arranged on the bearing seat A and the bearing seat B, impellers are arranged on the main shafts, an intermediate shell is sleeved on the outer side of each impeller between the air inlet shell and the air outlet shell, a sealing mechanism is arranged between the intermediate shell and each impeller, and a motor is arranged on the air inlet shell. The utility model has the advantages that: through setting up double seal mechanism and cooperating, can guarantee sealed effect, and can provide one insurance for the device more, guarantee the result of use of device, with clearance fit between floating ring and the stationary ring, make it finely tune along with the main shaft, prevent to damage, prolong its life, reduce the maintenance frequency, reduce the maintenance cost, improve the price/performance ratio.
Description
Technical Field
The utility model relates to the technical field of centrifugal fans, in particular to a floating ring shaft sealing structure of a multistage centrifugal fan.
Background
The multistage centrifugal fan is a high-pressure centrifugal fan product, a plurality of impellers are installed on the same main shaft, after air enters a 1 st-stage impeller through a fan air inlet, the rotating impeller enables sucked air to obtain kinetic energy, a diffusion chamber converts the kinetic energy of the air into static pressure energy to form pressure air, the pressure air enters the air inlet of the 2 nd-stage impeller through an air guide disc, the air pressure is raised again, the air circularly enters a 3 rd-stage impeller, a 4 th-stage impeller and an … nth-stage impeller, and finally the air is discharged through an air outlet of a fan outlet volute. The traditional multistage centrifugal fan interstage seal adopts a mechanical tooth type labyrinth seal, when the fan runs, the main shaft jumps, particularly the main shaft jumps in a surge area, so that the interstage seal is easily damaged, the interstage seal is damaged, and the performance of equipment is reduced or the equipment is stopped and maintained due to failure.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a floating ring shaft sealing structure of a multistage centrifugal fan, which has long service life and good sealing effect.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows: the utility model provides a multistage centrifugal fan's floating collar axle seal structure, includes air inlet shell and exhaust shell, the bottom of air inlet shell and exhaust shell be equipped with the base, air inlet shell and exhaust shell in be equipped with bearing frame A and bearing frame B respectively, bearing frame A and bearing frame B on be equipped with the main shaft, the main shaft on be equipped with the impeller, air inlet shell and exhaust shell between the outside cover of impeller be equipped with middle shell, middle shell and impeller between be equipped with sealing mechanism, the air inlet shell on be equipped with the motor, the transmission shaft and the main shaft of motor be connected.
As an improvement, the sealing mechanism comprises a main sealing mechanism and an auxiliary sealing mechanism, the main sealing mechanism is arranged on one side, close to the air inlet shell, of the impeller, and the auxiliary sealing mechanism is arranged on one side, close to the air outlet shell, of the impeller.
As an improvement, the main sealing mechanism comprises pressure plates which are oppositely arranged on the middle shell, static rings are respectively arranged between the pressure plates by the pressure plates, and floating rings are arranged between the static rings.
As an improvement, the auxiliary sealing mechanism comprises a groove arranged on a rotating shaft of the impeller, a sealing tooth matched with the groove is arranged on the middle shell, and the sealing tooth is arranged in the groove.
As an improvement, the floating ring and the static ring are in clearance fit.
Compared with the prior art, the utility model has the advantages that: through setting up double seal mechanism and cooperating, can guarantee sealed effect, and can provide one insurance for the device more, guarantee the result of use of device, with clearance fit between floating ring and the stationary ring, make it finely tune along with the main shaft, prevent to damage, prolong its life, reduce the maintenance frequency, reduce the maintenance cost, improve the price/performance ratio.
Drawings
Fig. 1 is a schematic structural diagram of a floating ring shaft sealing structure of a multistage centrifugal fan according to the present invention.
Fig. 2 is an enlarged schematic view of a floating ring shaft sealing structure a of the multistage centrifugal fan of the present invention.
Fig. 3 is an enlarged schematic view of a floating ring shaft sealing structure B of a multistage centrifugal fan according to the present invention.
As shown in the figure: 1. an air inlet housing; 2. an exhaust shell; 3. a base; 4. a bearing seat B; 5. a bearing seat A; 6. a motor; 7. a main shaft; 8. an impeller; 9. a middle shell; 10. pressing a plate; 11. a stationary ring; 12. a floating ring; 13. a seal tooth; 14. and (4) a groove.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
With reference to fig. 1-3, a multistage centrifugal fan's floating collar axle seal structure, including air inlet casing 1 and exhaust casing 2, the bottom of air inlet casing 1 and exhaust casing 2 be equipped with base 3, air inlet casing 1 and exhaust casing 2 in be equipped with bearing frame A5 and bearing frame B4 respectively, bearing frame A5 and bearing frame B4 on be equipped with main shaft 7, main shaft 7 on be equipped with impeller 8, air inlet casing 1 and exhaust casing 2 between the outside cover of impeller 8 be equipped with middle shell 9, middle shell 9 and impeller 8 between be equipped with sealing mechanism, air inlet casing 1 on be equipped with motor 6, the transmission shaft of motor 6 be connected with main shaft 7.
The sealing mechanism comprises a main sealing mechanism and an auxiliary sealing mechanism, the main sealing mechanism is arranged on one side, close to the air inlet shell 1, of the impeller 8, and the auxiliary sealing mechanism is arranged on one side, close to the air outlet shell 2, of the impeller 8.
The main sealing mechanism comprises pressure plates 10 which are oppositely arranged on the middle shell 9, static rings 11 are respectively arranged between the pressure plates 10 by the pressure plates 10, floating rings 12 are arranged between the static rings 11, and limit pins are inserted on the pressure plates 10 and the static rings 11.
The auxiliary sealing mechanism comprises a groove 14 arranged on a rotating shaft of the impeller 8, the middle shell 9 is provided with a sealing tooth 13 matched with the groove 14, and the sealing tooth 13 is arranged in the groove 14.
The floating ring 12 and the static ring 11 are in clearance fit.
The pressure plate and the static ring are fixedly arranged on the middle shell, the limit pin is inserted, the floating ring is arranged between the static rings and is in clearance fit with the static rings, the floating ring can move properly, the damage of the floating ring is prevented, the main sealing effect is achieved for the device, the auxiliary sealing mechanism is matched, the sealing effect is enhanced, and the device can be prevented from being incapable of continuously working after the main sealing mechanism fails.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (5)
1. The utility model provides a multistage centrifugal fan's floating collar axle seal structure, includes air inlet casing (1) and exhaust shell (2), its characterized in that: the bottom of air inlet shell (1) and exhaust shell (2) be equipped with base (3), air inlet shell (1) and exhaust shell (2) in be equipped with bearing frame A (5) and bearing frame B (4) respectively, bearing frame A (5) and bearing frame B (4) on be equipped with main shaft (7), main shaft (7) on be equipped with impeller (8), air inlet shell (1) and exhaust shell (2) between the outside cover of impeller (8) be equipped with middle shell (9), middle shell (9) and impeller (8) between be equipped with sealing mechanism, air inlet shell (1) on be equipped with motor (6), the transmission shaft and main shaft (7) of motor (6) be connected.
2. The floating ring shaft seal structure of a multistage centrifugal fan according to claim 1, characterized in that: the sealing mechanism comprises a main sealing mechanism and an auxiliary sealing mechanism, the main sealing mechanism is arranged on one side, close to the air inlet shell (1), of the impeller (8), and the auxiliary sealing mechanism is arranged on one side, close to the air exhaust shell (2), of the impeller (8).
3. The shaft sealing structure of the floating ring of the multistage centrifugal fan according to claim 2, characterized in that: the main sealing mechanism comprises pressure plates (10) which are oppositely arranged on the middle shell (9), static rings (11) are respectively arranged between the pressure plates (10) by the pressure plates (10), floating rings (12) are arranged between the static rings (11), and limit pins are inserted on the pressure plates (10) and the static rings (11).
4. The floating ring shaft seal structure of a multistage centrifugal fan according to claim 3, characterized in that: the auxiliary sealing mechanism comprises a groove (14) arranged on a rotating shaft of the impeller (8), a sealing tooth (13) matched with the groove (14) is arranged on the middle shell (9), and the sealing tooth (13) is arranged in the groove (14).
5. The floating ring shaft seal structure of a multistage centrifugal fan according to claim 4, characterized in that: the floating ring (12) and the static ring (11) are in clearance fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122851478.3U CN216554484U (en) | 2021-11-20 | 2021-11-20 | Floating ring shaft sealing structure of multistage centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122851478.3U CN216554484U (en) | 2021-11-20 | 2021-11-20 | Floating ring shaft sealing structure of multistage centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216554484U true CN216554484U (en) | 2022-05-17 |
Family
ID=81573718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122851478.3U Active CN216554484U (en) | 2021-11-20 | 2021-11-20 | Floating ring shaft sealing structure of multistage centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216554484U (en) |
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2021
- 2021-11-20 CN CN202122851478.3U patent/CN216554484U/en active Active
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