CN216589249U - Sealing structure for bearing seat in fan airflow channel - Google Patents

Abstract

The utility model relates to the technical field of machinery, and discloses a sealing structure for a bearing seat in a fan airflow channel, which solves the problems that corrosive media are transported to the sealing structure for the bearing seat in the fan airflow channel in the current market, the bearing and a belt protective cover leak, and the temperature of the using environment of the bearing and the belt is overhigh when high-temperature media are transported, which comprises a wind shell, wherein a bearing box body is fully welded in the wind shell, the top end of the bearing box body is higher than the top end of the wind shell, a fixed part is fully welded inside the wind shell and at the bottom of the bearing box body, a bearing seat is arranged in the bearing box body, and the rotating shaft is arranged in the bearing seat, and one end of the rotating shaft extends to the outside of the bearing box body, the utility model can greatly prevent the reduction of the service life of the bearing caused by medium leakage and high temperature, simplify the installation, there are great benefits in the use of such fans where there is a particular need to seal the bearing support structure within the airflow path.

Description

Sealing structure for bearing seat in fan airflow channel

Technical Field

The utility model belongs to the field of mechanics, and particularly relates to a sealing structure for a bearing seat in an airflow channel of a fan.

Background

The fan is a device which utilizes a motor or other driving devices to drive an impeller to rotate, and input mechanical energy is used for improving the pressure of gas so as to overcome the resistance of a pipeline or a device to carry out gas conveying, the fan has wide application range, and in the industries of steel, cement, chemical industry, electric power, food, tunnels, mines, building ventilation, dust removal and the like, the fan is just like a heart, so that power is provided for conveying gas blood, different industries and different conveying media are adopted, and in some extreme environments such as strong corrosion and high-temperature environments, the main body and parts of the fan are prevented from being damaged, and the structure of the fan is very important.

At present, the conventional structure for sealing the bearing seat in the fan airflow channel is to isolate the bearing seat from corrosive media by using a closed box body, but the sealing structure is easily influenced by other factors to cause leakage, and has the following defects; deformation caused by welding and sand blasting in the production process causes loose fitting of the cover plate, loose fitting of the sealing strip in assembly and the like; or the sealing strip is aged and failed due to long-time high temperature and corrosion; the bolts are easy to leak; the service life of the bearing and the belt in a high-temperature environment is reduced, and meanwhile, the lubricating oil adding period of the bearing is very short, so that a user needs to add oil frequently.

SUMMERY OF THE UTILITY MODEL

Aiming at the situation, in order to overcome the defects of the prior art, the utility model provides a sealing structure for a bearing seat in a fan airflow channel, which effectively solves the problems that corrosive media exist in the fan airflow channel in the current market during conveying, the bearing and a belt protective cover leak, and the temperature of the using environment of the bearing and the belt is too high during conveying high-temperature media.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a to bearing frame seal structure in fan airflow channel, including the wind shell, and the inside of wind shell has welded the bearing box, and the top of bearing box is higher than the top of wind shell, the bottom that just is located the bearing box in the inside of wind shell has welded the fixed part, the bearing frame is equipped with in the bearing box, and the pivot is equipped with in the inside of bearing frame, and the one end of pivot extends to the outside of bearing box, and the pivot is located the outside one end fixed mounting of bearing box and has the impeller, the belt pulley is equipped with to the one end that is located the bearing box inside in the pivot, the side fixed mounting that is close to the impeller at the bearing box has the cavity body, and the welding of cavity body is on the bearing box.

Preferably, the bottom of the hollow cavity is fixedly connected with a first drainage pipe, and the first drainage pipe slightly inclines downwards.

Preferably, the side of the cavity body is provided with a lip seal, and the lip seal is positioned between the cavity body and the impeller and is sleeved on the rotating shaft.

Preferably, four through holes are formed in the top of the fixing portion, and the bearing seat is fixed on the bearing box body through the through holes by using flange bolts.

Preferably, four flange bolts are provided with PTFE gaskets.

Preferably, the upward end of the wind shell is fully welded with a water retaining ring, and a second drain pipe is fixedly connected to the water retaining ring.

Compared with the prior art, the utility model has the beneficial effects that:

when the device is installed, the device is completely isolated from the medium, so that the problems of leakage, bolt leakage and the like caused by the fact that a sealed joint surface is not tight due to the deformation of a sealed protective cover during manufacturing are avoided;

the installation and maintenance are convenient, the design of bolt connection for the cover plate of the protective cover is cancelled, the workload of assembly and disassembly is reduced, and the trouble caused by easy tooth sliding and breakage during the installation or disassembly of the stainless steel bolt is also reduced;

corrosive liquid leaked from the lip seal is discharged through the drain hole, so that the damage to the bearing is further reduced;

the bearing frame is direct to contact with the outside atmospheric environment, and the belt pulley can drive the flow of gas simultaneously, has effectively avoided the high temperature adverse circumstances of the inside medium of fan, guarantees bearing and belt life-span, has also avoided simultaneously because of the bearing under high temperature environment, and the user needs the problem of frequent lubricating oil that adds.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is an enlarged schematic view of the present invention at A;

FIG. 3 is a schematic structural view of the connection between the bearing housing and the cavity according to the present invention;

FIG. 4 is a side cross-sectional view of the present invention;

in the figure: 2. a wind shell; 3. a bearing housing; 4. an impeller; 5. a fixed part; 6. a bearing seat; 7. a rotating shaft; 8. a cavity body; 9. a first drain pipe; 10. a water retaining ring; 11. a second drain pipe; 12. a flange bolt; 13. a PTFE gasket; 14. sealing the lips; 15. and a through hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the first embodiment, as shown in fig. 1-4, the present invention includes a wind casing 2, a bearing housing 3 is fully welded inside the wind casing 2, the top end of the bearing housing 3 is higher than the top end of the wind casing 2, the top end of the bearing housing 3 is an opening and directly contacts with the atmosphere, so as to prevent liquid from overflowing from a flange and flowing into a bearing seat 6 along the outer wall of the wind casing 2 due to uneven flange or loose sealing when a customer installs the wind casing 3, so that the bearing housing 3 needs to be higher than the wind casing 2 when being welded on the wind casing 2, a fixing portion 5 is fully welded inside the wind casing 2 and at the bottom of the bearing housing 3, the bearing seats 6 are fixedly installed on the bearing housing 3, a rotating shaft 7 is installed inside two bearing seats 6, one end of the rotating shaft 7 extends to the outside of the bearing housing 3, an impeller 4 is fixedly installed at one end of the rotating shaft 7 located outside the bearing housing 3, a belt pulley is installed at one end of the rotating shaft 7 located inside the bearing housing 3, a cavity body 8 is fixedly arranged on the side surface of the bearing box body 3 close to the impeller 4, and the cavity body 8 is welded on the bearing box body 3.

In the second embodiment, on the basis of the first embodiment, the first drainage pipe 9 is fixedly connected to the bottom of the hollow cavity 8, and the first drainage pipe 9 is slightly inclined downwards so as to drain water, when liquid leaked from the shaft seal is remained in the hollow cavity 8 and is drained from the first drainage pipe 9, so that the leaked liquid is prevented from directly splashing on the bearing seat 6.

Third embodiment, on the basis of second embodiment, the side of the cavity body 8 is provided with lip seal 14, and lip seal 14 is located between cavity body 8 and impeller 4 and cup joints on pivot 7, and inside PTFE gasket 13 that also needs to be placed when lip seal 14 is installed, and lip seal 14 is sealed effectual, and the price is cheaper, and is not very big to the requirement of installation space.

In the fourth embodiment, in addition to the third embodiment, four through holes 15 are formed in the top of the fixing portion 5, and the bearing housing 6 is fixed to the bearing housing 3 by the flange bolts 12 through the through holes 15.

In the fifth embodiment, on the basis of the fourth embodiment, the PTFE gaskets 13 are respectively added to the four flange bolts 12, so that the leakage problem caused by using common bolts is avoided.

Sixth, on the basis of fifth embodiment, the one end that the shell 2 faces upward has welded the retaining ring 10 fully, and fixedly connected with second drain pipe 11 on retaining ring 10, and retaining ring 10 need be to the little slope of one side that has the drain pipe, avoids ponding can't discharge.

The working principle is as follows: firstly, the bearing box body 3 needs to be fully welded outside the wind shell 2, the cavity body 8 needs to be welded with the bearing box body 3, a screw rod is fully welded in advance in a mounting hole of a lip seal 14 on the cavity body 8, after the wind shell 2 is welded, the bearing box body 3 and the wind shell 2 are fully welded, a water retaining ring 10 is fully welded on the wind shell 2, one end of a second drain pipe 11 is slightly inclined downwards during welding, the situation that accumulated water cannot be discharged is avoided, drainage is facilitated, a PTFE gasket 13 needs to be added during installation of the lip seal 14 and installation of a flange bolt 12 of the fixing part 5, because the bearing box body 3 completely isolates media in the wind shell 2 and is simultaneously contacted with the atmosphere, the structure can greatly prevent the reduction of the service life of a bearing caused by high temperature due to medium leakage, and installation is simplified, and the special fan which needs to seal the bearing base structure in an airflow channel has great benefits in use.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a to bearing frame seal structure in fan airflow channel, includes wind shell (2), its characterized in that: and the inside of wind shell (2) has welded bearing box (3) fully, and the top of bearing box (3) is higher than the top of wind shell (2), the bottom that just is located bearing box (3) in the inside of wind shell (2) has welded fixed part (5) fully, bearing frame (6) are equipped with in bearing box (3), and pivot (7) are equipped with in the inside of bearing frame (6), and the one end of pivot (7) extends to the outside of bearing box (3), and pivot (7) are located the outside one end fixed mounting of bearing box (3) and have impeller (4), the belt pulley is equipped with to the one end that is located bearing box (3) inside in pivot (7), side fixed mounting that is close to impeller (4) in bearing box (3) has cavity body (8), and welding of cavity body (8) is on bearing box (3).

2. The opposite bearing seat sealing structure in the airflow channel of the fan according to claim 1, characterized in that: the bottom fixedly connected with first drain pipe (9) of cavity body (8), and first drain pipe (9) slope down slightly.

3. The opposite bearing seat sealing structure in the airflow channel of the fan according to claim 2, characterized in that: the side of the cavity body (8) is provided with a lip seal (14), and the lip seal (14) is positioned between the cavity body (8) and the impeller (4) and is sleeved on the rotating shaft (7).

4. The fan airflow channel inner-to-bearing seat sealing structure according to claim 3, characterized in that: four through holes (15) are formed in the top of the fixing portion (5), and the bearing seat (6) is fixed on the bearing box body (3) through the through holes (15) by using flange bolts (12).

5. The fan airflow channel inner-to-bearing seat sealing structure according to claim 4, characterized in that: PTFE gaskets (13) are added to the four flange bolts (12).

6. The fan airflow channel inner-to-bearing seat sealing structure according to claim 5, characterized in that: the one end that shell (2) up has welded water retaining ring (10) fully, and fixedly connected with second drain pipe (11) on water retaining ring (10).

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