CN203835786U - Seal device for bearing of boiler induced draft fan - Google Patents
Seal device for bearing of boiler induced draft fan Download PDFInfo
- Publication number
- CN203835786U CN203835786U CN201420134176.1U CN201420134176U CN203835786U CN 203835786 U CN203835786 U CN 203835786U CN 201420134176 U CN201420134176 U CN 201420134176U CN 203835786 U CN203835786 U CN 203835786U
- Authority
- CN
- China
- Prior art keywords
- bearing
- draft fan
- gland
- oil
- labyrinth seal
- 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
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Sealing Devices (AREA)
Abstract
The utility model discloses a seal device for a bearing of a boiler induced draft fan. The seal device comprises an induced draft fan casing, a bearing, a bearing box and a gland, wherein the bearing penetrates the interior of the induced draft fan casing; the outer side of the bearing is sleeved with the bearing box and the gland; the bearing box is located inside the induced draft fan casing; the left side of the gland is connected with and tightly pushes the right side of the induced draft fan casing. The seal device is characterized in that a labyrinth sealing part is arranged at the connecting part of the gland and the induced draft fan casing; a circular oil guiding groove is formed in the outer side of the left end of the labyrinth sealing part; an oil returning opening a is formed in the left lower corner of the labyrinth sealing part; one end of the oil returning opening is connected with the circular oil guiding groove; the other end of the oil returning opening a is connected with the bearing box; two circular grooves are formed in the inner side of the labyrinth sealing part in parallel; an oil returning opening b is formed in the bottom of each circular groove; a radial oil guiding groove is formed in the lower part of the labyrinth sealing part; the lower end of the radial oil guiding groove is communicated with the circular oil guiding groove; the bearing box is connected with a front spiral seal oil returning opening c which is located above the radial oil guiding groove. The seal device is simple in structure and strong in leak tightness, and has no oil leakage.
Description
Technical field
The utility model relates to a kind of seal arrangement, is specifically related to a kind of boiler induced-draft fan associated sealing arrangement for bearings.
Background technique
The main shaft of boiler induced-draft fan drive part adopts rolling bearing, bearing housing is two independently bearing housings, its sealing adopts felt sealing and preposition labyrinth seal, felt sealing is installed near preposition labyrinth seal place, between the two without Oil Guide ring, and felt outside is compressed by gland, in use, lubricant oil in bearing housing rotates with rolling bearing, after having got rid of through preposition labyrinth seal, because preposition labyrinth seal bottom is without return opening, the oil being stopped by labyrinth seal just soaks the ring-like grain that has expired labyrinth seal soon, along with the continuation operation of induced draught fan, the lubricant oil that constantly entered afterwards labyrinth seal annular groove will some return in bearing housing, another part lubricant oil flows to felt side, adsorbed by felt, along with the induced draught fan prolongation of working time, in felt, the lubricant oil of absorption is tending towards saturated gradually, simultaneously because bearing rotates, the lubricant oil constantly throwing away from bearing housing side continues to be adsorbed by felt, add after bearing rotates and produce heat, pressure in bearing housing will raise, the gas expanding in bearing housing also can form certain pressure outside, the lubricant oil adsorbing on felt is like this except a part is from return opening returns to bearing housing, some can be from felt along gland direct-axis to constantly spilling, and because the pressure of gland outside is lower than bearing housing internal pressure, and be easy to ooze out outside gland, after bearing rotates simultaneously, be easier to outwards throw away along the lubricant oil oozing out on bearing, cause felt sealing not have due seal action.
Model utility content
Technical problem to be solved in the utility model is to provide a kind of boiler induced-draft fan associated sealing arrangement for bearings, thereby this apparatus structure is simple, sealing is strong, greatly reduce the operating cost of induced draught fan without oil leakage phenomenon, reduce induced draught fan because of the interruption of service that leakage of oil causes, reduced plant operations personnel's working strength.
Technical problem to be solved in the utility model realizes by the following technical solutions:
Boiler induced-draft fan associated sealing arrangement for bearings, comprise electric fan shell, bearing, bearing housing and gland, bearing is through electric fan shell inside, bearing outside cover has bearing housing and gland, bearing housing is positioned at electric fan shell inside, the gland left side and electric fan shell the right is connected and by its compression, it is characterized in that: be provided with labyrinth seal at gland and electric fan shell joint, described labyrinth seal left end outside has hoop oil guide slot, have return opening a in labyrinth seal left bottom, return opening a one end is connected with hoop oil guide slot, and the other end is connected with bearing housing.
Have side by side two circular grooves in labyrinth seal inner side, circular groove bottom respectively has return opening b.
Described labyrinth seal below has radial guiding oil groove, and its lower end communicates with hoop oil guide slot.
On described bearing housing, be also connected with preposition spiral seal return opening c, it is positioned at radial guiding oil groove top.
The beneficial effects of the utility model are: by having return opening c at preposition labyrinth seal annular groove bottom, and be connected with bearing housing, can make the lubricant oil that enters labyrinth seal return in time bearing housing inside; On labyrinth seal, inner side has side by side two circular grooves and below the Sealing of palace, has radial guiding oil groove and can make induced draught fan oil return unimpeded, and without oil leakage phenomenon.
Brief description of the drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is A-A side view in Fig. 1;
In figure: 1-electric fan shell; 2-bearing; 3-bearing housing; 4-gland; 5-labyrinth seal; 6-hoop oil guide slot; 7-circular groove; 8-radial guiding oil groove.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1-2, boiler induced-draft fan associated sealing arrangement for bearings, comprise electric fan shell 1, bearing 2, bearing housing 3 and gland 4, bearing 2 is through electric fan shell 1 inside, bearing 2 outside covers have bearing housing 3 and gland 4, bearing housing 3 is positioned at electric fan shell 1 inside, gland 4 left sides are connected with electric fan shell 1 the right and by its compression, be provided with labyrinth seal 5 in gland 4 and electric fan shell 1 joint, labyrinth seal 5 left end outsides have hoop oil guide slot 6, have return opening a in labyrinth seal 5 left bottoms, return opening a one end is connected with hoop oil guide slot 6, the other end is connected with bearing housing 3.
Have side by side two circular grooves 7 in labyrinth seal 5 inner sides, circular groove 7 bottoms respectively have return opening b, make induced draught fan oil return more unimpeded.
Below labyrinth seal 5, have radial guiding oil groove 8, its lower end communicates with hoop oil guide slot 6, can make induced draught fan oil return unimpeded, and without oil leakage phenomenon.
On bearing housing 3, be also connected with preposition spiral seal return opening c, it is positioned at radial guiding oil groove 6 tops.By return opening c, can make the lubricant oil that enters labyrinth seal return in time bearing housing 3 inside.
More than show and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. boiler induced-draft fan associated sealing arrangement for bearings, comprise electric fan shell, bearing, bearing housing and gland, bearing is through electric fan shell inside, bearing outside cover has bearing housing and gland, bearing housing is positioned at electric fan shell inside, the gland left side and electric fan shell the right is connected and by its compression, it is characterized in that: be provided with labyrinth seal at gland and electric fan shell joint, described labyrinth seal left end outside has hoop oil guide slot, have return opening a in labyrinth seal left bottom, return opening a one end is connected with hoop oil guide slot, the other end is connected with bearing housing.
2. boiler induced-draft fan associated sealing arrangement for bearings according to claim 1, is characterized in that: have side by side two circular grooves in labyrinth seal inner side, circular groove bottom respectively has return opening b.
3. boiler induced-draft fan associated sealing arrangement for bearings according to claim 1, is characterized in that: described labyrinth seal below has radial guiding oil groove, and its lower end communicates with hoop oil guide slot.
4. boiler induced-draft fan associated sealing arrangement for bearings according to claim 1, is characterized in that: on described bearing housing, be also connected with preposition spiral seal return opening c, it is positioned at radial guiding oil groove top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420134176.1U CN203835786U (en) | 2014-03-11 | 2014-03-11 | Seal device for bearing of boiler induced draft fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420134176.1U CN203835786U (en) | 2014-03-11 | 2014-03-11 | Seal device for bearing of boiler induced draft fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203835786U true CN203835786U (en) | 2014-09-17 |
Family
ID=51513634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420134176.1U Expired - Fee Related CN203835786U (en) | 2014-03-11 | 2014-03-11 | Seal device for bearing of boiler induced draft fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203835786U (en) |
-
2014
- 2014-03-11 CN CN201420134176.1U patent/CN203835786U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20150311 |
|
| EXPY | Termination of patent right or utility model |