CN203770197U - Radial comb sealing device - Google Patents
Radial comb sealing device Download PDFInfo
- Publication number
- CN203770197U CN203770197U CN201420072086.4U CN201420072086U CN203770197U CN 203770197 U CN203770197 U CN 203770197U CN 201420072086 U CN201420072086 U CN 201420072086U CN 203770197 U CN203770197 U CN 203770197U
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- CN
- China
- Prior art keywords
- radial clearance
- teeth groove
- cell wall
- concentric
- main shaft
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- 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)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a radial comb sealing device which is used for radially sealing the gap between a centrifugal fan and a main shaft; the casing of the centrifugal fan is provided with a first shaft hole allowing the main shaft to pass through; the radial comb sealing device comprises a static plate fixedly arranged on the casing of the centrifugal fan and a rotating plate; the main shaft is sleeved with the rotating plate; the rotating plate rotates along with the main shaft; the static plate is provided with a second shaft hole for allowing the main shaft to pass through; one end surface, opposite to the rotating plate, of the static plate is provided with a plurality of first concentric tooth sockets; the first concentric tooth sockets and the shaft holes are concentric; the diameters of the first concentric tooth sockets are larger than those of the shaft holes; one end surface, opposite to the static plate, of the rotating plate is provided with a plurality of second concentric tooth sockets matched with the first concentric tooth sockets; the first concentric tooth sockets and the second concentric tooth sockets are in clearance fit to form an airflow passage. The radial comb sealing device can prevent air in the casing of the centrifugal fan from leaking.
Description
Technical field
The utility model relates to a kind of seal arrangement, relates in particular to radially labyrinth seal device of one.
Background technique
Centrifugal fan shaft end seal is one of most important parts of blower fan, its existence mixes and plays decisive role for the outer gas of gas and housing in isolated Blower Housing, in the situation that there is no shaft end seal, in Blower Housing, the outer gas of gas and housing mixes, to outward leakage, to environment, especially some special Blower Housings contain toxic gas human body are worked the mischief, and if this harm prevention ahead of time just likely cause the generation of security incident.
In centrifugal fan and main shaft attachment portion, between the axis hole of centrifugal fan and axle, can produce certain interval (referring to Fig. 1), in existing technology, generally sealing is not taked in this gap, even if take sealing to a certain extent, also do not carry out sealing completely truly, so, the gas of making something perfect even more perfect in the casing by centrifugal fan causes the pollution on certain procedures to environment.
Model utility content
The technical problem that the utility model mainly solves is to provide radially labyrinth seal device of one, can seal the gas sealing completely in centrifugal fan, prevents gas leak.
In order to address the above problem, the technological scheme that the utility model adopts is: radially labyrinth seal device of one is provided, for the gap of radial seal centrifugal fan and main shaft, the casing of described centrifugal fan offers the first axis hole passing for main shaft, and described radially labyrinth seal device comprises the stationary disk on the casing that is fixedly arranged on centrifugal fan and is sheathed on main shaft and follows the rotating disc that main shaft rotates; Described stationary disk offers the second axis hole passing for main shaft, described stationary disk offers the some first concentric teeth groove with respect to an end face of rotating disc, concentric and diameter is greater than the diameter of axis hole to the described first concentric teeth groove with axis hole, described rotating disc offers some the second concentric teeth groove that match with the first concentric teeth groove with respect to an end face of stationary disk, the described first concentric teeth groove and the second concentric teeth groove Spielpassung are to form air-flow path.
Wherein, the described first concentric teeth groove comprise the first diapire and with vertically disposed the first cell wall of the first diapire and the second cell wall; The described second concentric teeth groove comprise the second diapire and with vertically disposed the 3rd cell wall of the second diapire and the 4th cell wall; Described first size of concentric teeth groove and the equal and opposite in direction of the second concentric teeth groove; In the time of the described first concentric teeth groove and the second concentric teeth groove Spielpassung, described the 3rd cell wall and the 4th cell wall are towards one end and the first diapire Spielpassung of the first diapire, and described the first cell wall and the second cell wall are towards one end and the second diapire Spielpassung of the second diapire; Described the first cell wall and the 3rd cell wall have the first radial clearance, and described the second cell wall and the 3rd cell wall have the second radial clearance, and described the second cell wall and the 4th cell wall have the 3rd radial clearance.
Wherein, described the first radial clearance equates with the 3rd radial clearance and the first radial clearance and the 3rd radial clearance are less than the second radial clearance.
Wherein, described the first radial clearance, the second radial clearance and the 3rd radial clearance equate.
Wherein, described the first radial clearance equates with the 3rd radial clearance and the first radial clearance and the 3rd radial clearance are greater than the second radial clearance.
Wherein, the other end of described stationary disk is fixedly connected with casing by welding or bolt.
Wherein, described rotating disc is bolted and is sheathed on described main shaft.
The beneficial effects of the utility model are: the situation that is different from prior art, radially labyrinth seal device of the present utility model, after coordinating by the intersection of the first teeth groove and the second teeth groove, to form longer labyrinth shape air-flow path, the resistance of longer labyrinth shape air-flow path stops the gas leak in casing.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the sectional view that in prior art, centrifugal fan coordinates with main shaft.
Fig. 2 is radially labyrinth seal device one embodiment's sectional view of the utility model.
Fig. 3 is enlarged view when radially rotating disc and stationary disk are meshing in labyrinth seal device one embodiment in the utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment who obtains under creative work prerequisite, all belong to the scope of the utility model protection.
Use the terms such as " first ", " second " to describe various elements if occur, but these elements should not limited by these terms herein.These terms are only used for distinguishing an element and another element.Therefore " first " element of, below discussing also can be called as " second " element and not depart from instruction of the present invention.It should be understood that, if while mentioning an element " connection " or " connection " to another element, can directly connect or directly be connected to another element or also can have intermediary element.On the contrary, in the time mentioning that an element " directly connects " or " directly connecting " arrives another element, there is not intermediary element.
The various terms that occur in this article are only not intended to as limitation of the invention for describing the object of concrete mode of execution, unless context clearly point out in addition, otherwise singulative intention also comprises plural form.
When using in this manual term " to comprise " and/or when " including ", these terms have indicated the existence of described feature, entirety, step, operation, element and/or parts, but also do not get rid of the existence of above other features, entirety, step, operation, element, parts and/or its group and/or add.
About mode of execution:
Refer to Fig. 2, Fig. 2 is radially labyrinth seal device one embodiment's sectional view of the utility model.The radially labyrinth seal device of the present embodiment, for the gap of radial seal centrifugal fan and main shaft 1, the casing 2 of described centrifugal fan offers the first axis hole 21 passing for main shaft 1, and described radially labyrinth seal device comprises the stationary disk 31 on the casing 2 that is fixedly arranged on centrifugal fan and is sheathed on main shaft 1 and follows the rotating disc 32 that main shaft 1 rotates; Described stationary disk 31 offers the second axis hole 311 passing for main shaft 1, described stationary disk 31 offers the some first concentric teeth groove 312 with respect to an end face of rotating disc 32, concentric and diameter is greater than the diameter of the second axis hole 311 to the described first concentric teeth groove 312 with the second axis hole 311, described rotating disc 32 offers some the second concentric teeth groove 321 that match with the first concentric teeth groove 312 with respect to an end face of stationary disk 31, the described first concentric teeth groove 312 and the second concentric teeth groove 321 Spielpassung are to form air-flow path.Wherein:
On the casing 2 of centrifugal fan, offer the first axis hole 21 that main shaft 1 passes, in order to make main shaft 1 well pierce into casing 2, the aperture of this first axis hole 21 is a bit larger tham the diameter of main shaft 1.
Stationary disk 31 is greater than disk or the oblong-shaped disc of the first axis hole 21 for having certain thickness and diameter, in other embodiment, this stationary disk 31 can also be other shape certainly.This stationary disk 31 also offers the second axis hole 311 that main shaft 1 passes, the equal diameters of this second axis hole 311 and second axis hole 311 and first axis hole 21 concentric with the first axis hole 21.The first end of stationary disk 31 is affixed by mode and the casing 2 of bolt or welding, the second end has equidistantly offered the some first concentric teeth groove 312 towards one end of rotating disc 32 along the second axis hole 311, in this example, on stationary disk 31, equidistantly offer five first concentric teeth groove 312.Certainly, in different embodiments, the number of the first concentric teeth groove 312 can change according to the difference of the type of centrifugal fan or size, and similarly, each concentric teeth groove is also not limited to spaced set.
Rotating disc 32 is sheathed on main shaft 1 and is relative with stationary disk 31.Particularly, rotating disc 32 is sheathed on main shaft 1 by the mode of bolt or welding, and in this example, described rotating disc 32 is located on main shaft 1 by bolt sleeve.Described rotating disc 32 comprises fixing part 322 and teeth groove portion 323.Fixing part 322 offers the hole of passing for bolt, and on main shaft 1, corresponding position also offers bolt fixed hole, bolt through the hole on fixing part 322 and the bolt fixed hole on main shaft 1 so that rotating disc 32 fixed covers are located on main shaft 1.Teeth groove portion 323 is one-body molded with fixing part 322, the diameter of teeth groove portion 323 is greater than the diameter of fixing part 322, teeth groove portion 323 is that whole rotating disc 32 offers the second concentric teeth groove 321 matching with the first concentric teeth groove 312 with respect to an end face of stationary disk 31 with respect to one end of stationary disk 31, described in match that the number of the second concentric teeth groove 321 matches, shape matches, size matches etc.Similarly, this some second concentric teeth groove 321 is concentric teeth groove, and diameter and the second concentric teeth groove 321 that the diameter of the second concentric teeth groove 321 is all greater than main shaft 1 are equidistantly opened in teeth groove portion 323.
Refer to Fig. 3, the described first concentric teeth groove 312 comprise the first diapire 3121 and with vertically disposed the first cell wall 3122 of the first diapire 3121 and the second cell wall 3123; The described second concentric teeth groove 321 comprise the second diapire 3211 and with vertically disposed the 3rd cell wall 3212 of the second diapire 3211 and the 4th cell wall 3213; Described first size of concentric teeth groove 312 and the equal and opposite in direction of the second concentric teeth groove 321; In the time of the described first concentric teeth groove 312 and the second concentric teeth groove 321 Spielpassung, described the 3rd cell wall 3212 and the 4th cell wall 3213 are towards one end and first diapire 3121 Spielpassung of the first diapire 3121, and described the first cell wall 3122 and the second cell wall 3123 are towards one end and second diapire 3211 Spielpassung of the second diapire 3211; Described the first cell wall 3122 and the 3rd cell wall 3212 have the first radial clearance 33, and described the second cell wall 3123 and the 3rd cell wall 3212 have the second radial clearance 34, and described the second cell wall 3123 and the 4th cell wall 3213 have the 3rd radial clearance 35.In this example, described the first radial clearance 33 equates with the 3rd radial clearance 35, and the first radial clearance 33 and the 3rd radial clearance 35 are all greater than the second radial clearance 34.Understandably, in different embodiments, described the first radial clearance 33 radially equates with the 3rd, and the first radial clearance 33 and the 3rd radial clearance 35 equate with the second radial clearance 34; If the first radial clearance 33 equates with the 3rd radial clearance 35, and the first radial clearance 33 and the 3rd radial clearance 35 are all greater than the second radial clearance 34.
In the time that main shaft 1 rotates with respect to centrifugal fan, driven rotary dish 32 rotates with respect to stationary disk 31, and then make the some second concentric teeth groove 321 with the first concentric teeth groove 312 Spielpassung and rotate with respect to the first concentric teeth groove 312, the air-flow that gap between the second concentric teeth groove 321 and the first concentric teeth groove 312 forms is by making to have lengthened the passage that the gas in casing flows out, the longer resistance of this gas flow pass is larger, when the pressure of the gas within the resistance of passage is greater than casing 2, can play the effect of the gas in sealed enclosure 2.
The utility model embodiment, the first concentric teeth groove 312 by stationary disk 31 and rotating disc 32 and the second concentric teeth groove 321 mates and intersect arrangement mutually, form labyrinth.Size and relative position by speed governing teeth groove can obtain good sealing effect.This radially labyrinth seal device can shorten main shaft 1 span, fluid is the air-flow path to form through the gap of the first concentric teeth groove 312 and the second concentric teeth groove 321 sounds, produces larger energy loss through throttling repeatedly, and fluid head greatly declines, make fluid leaks, reached the object of sealing.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (7)
1. a labyrinth seal device radially, for the gap of radial seal centrifugal fan and main shaft, the casing of described centrifugal fan offers the first axis hole passing for main shaft, it is characterized in that: comprise the stationary disk on the casing that is fixedly arranged on centrifugal fan and be sheathed on main shaft and follow the rotating disc that main shaft rotates; Described stationary disk offers the second axis hole passing for main shaft, described stationary disk offers the some first concentric teeth groove with respect to an end face of rotating disc, concentric and diameter is greater than the diameter of axis hole to the described first concentric teeth groove with axis hole, described rotating disc offers some the second concentric teeth groove that match with the first concentric teeth groove with respect to an end face of stationary disk, the described first concentric teeth groove and the second concentric teeth groove Spielpassung are to form air-flow path.
2. radially labyrinth seal device as claimed in claim 1, is characterized in that:
The described first concentric teeth groove comprise the first diapire and with vertically disposed the first cell wall of the first diapire and the second cell wall; The described second concentric teeth groove comprise the second diapire and with vertically disposed the 3rd cell wall of the second diapire and the 4th cell wall;
Described first size of concentric teeth groove and the equal and opposite in direction of the second concentric teeth groove;
In the time of the described first concentric teeth groove and the second concentric teeth groove Spielpassung, described the 3rd cell wall and the 4th cell wall are towards one end and the first diapire Spielpassung of the first diapire, and described the first cell wall and the second cell wall are towards one end and the second diapire Spielpassung of the second diapire; Described the first cell wall and the 3rd cell wall have the first radial clearance, and described the second cell wall and the 3rd cell wall have the second radial clearance, and described the second cell wall and the 4th cell wall have the 3rd radial clearance.
3. radially labyrinth seal device as claimed in claim 2, is characterized in that: described the first radial clearance equates with the 3rd radial clearance and the first radial clearance and the 3rd radial clearance are less than the second radial clearance.
4. radially labyrinth seal device as claimed in claim 2, is characterized in that: described the first radial clearance, the second radial clearance and the 3rd radial clearance equate.
5. radially labyrinth seal device as claimed in claim 2, is characterized in that: described the first radial clearance equates with the 3rd radial clearance and the first radial clearance and the 3rd radial clearance are greater than the second radial clearance.
6. radially labyrinth seal device as claimed in claim 1, is characterized in that: the other end of described stationary disk is fixedly connected with casing by welding or bolt.
7. radially labyrinth seal device as claimed in claim 1, is characterized in that: described rotating disc is bolted and is sheathed on described main shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420072086.4U CN203770197U (en) | 2014-02-19 | 2014-02-19 | Radial comb sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420072086.4U CN203770197U (en) | 2014-02-19 | 2014-02-19 | Radial comb sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203770197U true CN203770197U (en) | 2014-08-13 |
Family
ID=51287393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420072086.4U Expired - Fee Related CN203770197U (en) | 2014-02-19 | 2014-02-19 | Radial comb sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203770197U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847689A (en) * | 2015-05-04 | 2015-08-19 | 亿昇(天津)科技有限公司 | Active centrifugal blower sealing structure |
-
2014
- 2014-02-19 CN CN201420072086.4U patent/CN203770197U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847689A (en) * | 2015-05-04 | 2015-08-19 | 亿昇(天津)科技有限公司 | Active centrifugal blower sealing structure |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20220219 |