CN201884325U - Sealing device of rotating shaft - Google Patents
Sealing device of rotating shaft Download PDFInfo
- Publication number
- CN201884325U CN201884325U CN2010206618306U CN201020661830U CN201884325U CN 201884325 U CN201884325 U CN 201884325U CN 2010206618306 U CN2010206618306 U CN 2010206618306U CN 201020661830 U CN201020661830 U CN 201020661830U CN 201884325 U CN201884325 U CN 201884325U
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- China
- Prior art keywords
- impeller
- spiral seal
- sealing device
- section
- spiral
- 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 - Lifetime
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Abstract
The utility model discloses a sealing device of a rotating shaft, comprising a seal cavity, wherein a spiral seal section and a parking seal section are arranged in sequence along the axial direction in the seal cavity; an impeller spiral seal section is arranged between the spiral seal section and the parking seal section; the impeller spiral seal section is an impeller seal assembly consisting of an impeller seat jacket and an impeller; the impeller is fixed on a rotating shaft by the impeller seat jacket; a rotating jacket at the tail end of the spiral seal section extends to the inner circumference of the impeller; the front part of a blade of the impeller is bent; and in the sealing device, the structure is simple, the occupied length of the shaft by sealing is short, the sealing effect is good and the service life is long.
Description
Technical field
The utility model relates to a kind of sealing device for rotary shaft, especially a kind of running shaft non-contact sealing arrangement.
Background technique
Sealing to running shaft in the prior art is divided into contact seal and noncontact seal two big classes, contact seal comprises material filling type sealing and mechanical seal, the material filling type sealing exists surface friction drag big, working life is short, shortcomings such as consumption of power is big, though mechanical seal has solved aforesaid drawbacks, but, mechanical seal self also exists complex structure, the requirement on machining accuracy height, problems such as cost of production height, the noncontact seal that with the spiral seal is representative then has simple in structure, be easy to processing, parts depreciation is little, advantages such as long service life, but, spiral seal also exists to have only when running shaft reaches certain rotating speed and could realize shaft sealing, and sealing effect is bad when stopping or during the slow-speed of revolution.China utility model patent CN2082339 discloses a kind of labyrinth spiral sealing device with parking sealer, the sealing device solves sealing problem of spiral seal under the slow-speed of revolution or vehicle stop state, but, the sealing load of this seal arrangement depends on the length of sealing screw, when the bigger sealing load of needs, will increase the length of sealing screw, therefore, increased the size of seal arrangement, and the parking sealer part also will be born certain pressure under the state of spiral seal proper functioning, causes reduce the working life of parking sealing arrangement.
The model utility content
The technical problem that model utility will solve is: a kind of sealing device for rotary shaft is provided, and the sealing apparatus structure is simple, length weak point, good sealing effect, the long service life of the shared axle of sealing.
The technological scheme that the technical solution problem is adopted: a kind of sealing device for rotary shaft, comprise Seal cage, in Seal cage, set gradually spiral seal section, parking sealer section vertically, in spiral seal section and the intersegmental impeller spiral seal section that also is provided with of parking sealer, the impeller seals assembly of described impeller spiral seal section for constituting by impeller cover for seat and impeller, impeller is fixed on the running shaft by the impeller cover for seat, the rotary sleeve of spiral seal section end extends to the impeller inner circumference, and the blade of impeller is a forward curved vane.
As improvement of the present utility model: described impeller cover for seat is the ladder reducer socket, and the excircle of impeller cover for seat and impeller linkage section is provided with the spiral seal groove.
As further improvement of the utility model: described impeller is multistage, and impeller is arranged vertically successively.
Further improve as of the present utility model: described impeller is a two-stage, and the fixed cover of spiral seal section end extends to first order impeller inner circumference, and the rotary sleeve of spiral seal section end extends to second level impeller inner circumference again.
The excircle that extends to the fixed cover of first order impeller inner circumference is provided with the spiral seal groove that cooperates with the spiral seal of first order impeller inner circumference.
Improve as another kind of the present utility model: the end in the spiral seal section is provided with the pressure release ring cavity.
As preferred version of the present utility model: described parking sealer section is a labyrinth seal assemblies.
Beneficial effect: the utility model sealing device for rotary shaft, owing to adopted at spiral seal section and the intersegmental technical characteristics that also is provided with impeller spiral seal section of parking sealer, rotate by running shaft impeller black box, to leak to the guiding fluid impeller inner circumference of impeller outer circumference from the spiral seal section, cooperate with the spiral seal of impeller inner circumference by the rotary sleeve that extends to the impeller inner circumference, leak liquid is caught up with to revealing source, therefore, the sealing effect of sealing device for rotary shaft of the present utility model is better, when reaching the identical sealing load of common spiral seal, the infiltration length of needed spiral seal can shorten more than 30%, reduced to seal the length of shared axle, and can break through the constraint of spiral seal design parameter, remedy spiral seal sealing effect defect of bad when the slow-speed of revolution by the suitable intensification spiral seal section spiral fluted degree of depth, simultaneously, owing to increased impeller spiral seal section, the pressure that the parking sealer section is born when making the axle rotation significantly reduces, the pressure state that goes to zero has prolonged working life of Sealing; Because having adopted described impeller cover for seat is the ladder reducer socket, the excircle of impeller cover for seat and impeller linkage section is provided with the technical characteristics of spiral seal groove, the leak liquid of impeller section remnants can be caught up with to the impeller liquid entering hole when rotated, by the inner circumference place of wing pump, stop remaining leakage liquid to enter and its contiguous parking sealer section to impeller; Because having adopted described impeller is two-stage, the fixed cover of spiral seal section end extends to first order impeller inner circumference, the rotary sleeve of spiral seal section end extends to the technical characteristics of second level impeller inner circumference, makes that sealing effect of the present utility model is better, and the pressure that can bear is improved; Owing to adopted the excircle of the fixed cover that extends to first order impeller inner circumference to be provided with the technical characteristics of the spiral seal groove that cooperates with the spiral seal of first order impeller inner circumference, can reduce the amount of leakage of liquid to the sencond stage impeller excircle, reduce the leakage pressure of sencond stage impeller excircle, make the sealing effect of seal arrangement of the present utility model further improve; Owing to adopted the technical characteristics that is provided with the pressure release ring cavity at the end of spiral seal section, the liquid that is pumped into by impeller can be assigned in the multi-head spiral groove of spiral seal section uniformly, make that seal arrangement work of the present utility model is more stable; Owing to adopted labyrinth seal assemblies as the parking sealer section, match with the impeller spiral seal section and the spiral seal section of its front end, make running shaft under parking and rotary state, can both obtain best sealing effect.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the structural representation of sealing device for rotary shaft of the present utility model;
Fig. 2 is the sectional drawing of impeller black box in the sealing device for rotary shaft of the present utility model;
Fig. 3 is that the A-A of Fig. 2 is to sectional drawing.
Embodiment
As shown in Figure 1, sealing device for rotary shaft of the present utility model comprises Seal cage, sets gradually spiral seal section, impeller spiral seal section, parking sealer section in Seal cage vertically.Described spiral seal section is made of fixed cover 2 and rotary sleeve 1, is provided with the spiral seal groove on the excircle of rotary sleeve; Described parking sealer section is a labyrinth seal assemblies 5; Described impeller spiral seal section is an impeller seals assembly 3.Impeller seals assembly 3 is made of impeller cover for seat 32 and impeller 31 as shown in Figure 2, impeller is fixed on the running shaft 6 by the impeller cover for seat, the impeller cover for seat is the ladder reducer socket, the excircle of impeller cover for seat and impeller linkage section 321 is provided with the spiral seal groove, as shown in Figure 3, the blade 310 of impeller is a forward curved vane.The rotary sleeve 4 of spiral seal section end extends to the impeller inner circumference during assembling.For the liquid that is pumped into by impeller can be assigned in the multi-head spiral groove of spiral seal section uniformly, be provided with pressure release ring cavity 8 at the end of spiral seal section.In the present embodiment, in order to improve the sealing effect sencond stage impeller of on the impeller seals assembly, arranging successively vertically, be respectively first order impeller 311 and second level impeller 312, its assembling as shown in Figure 1, the fixed cover of spiral seal section end extends to first order impeller 311 inner circumferences, be provided with the spiral seal groove that cooperates with the spiral seal of first order impeller inner circumference on the excircle 7 of the fixed cover that extends to first order impeller inner circumference, the rotary sleeve 4 of spiral seal section end extends to second level impeller 312 inner circumferences.In order to obtain the better sealing effect multi-stage impeller of can on the impeller seals assembly, arranging successively vertically.
Claims (8)
1. sealing device for rotary shaft, comprise Seal cage, in Seal cage, set gradually spiral seal section, parking sealer section vertically, it is characterized in that: in spiral seal section and the intersegmental impeller spiral seal section that also is provided with of parking sealer, described impeller spiral seal section is the impeller seals assembly (3) that is made of impeller cover for seat (32) and impeller (31), impeller is fixed on the running shaft by the impeller cover for seat, the rotary sleeve (4) of spiral seal section end extends to the impeller inner circumference, and the blade of impeller (310) is a forward curved vane.
2. a kind of sealing device for rotary shaft according to claim 1 is characterized in that: described impeller cover for seat is the ladder reducer socket, and the excircle of impeller cover for seat and impeller linkage section (321) is provided with the spiral seal groove.
3. a kind of sealing device for rotary shaft according to claim 2 is characterized in that: described impeller is multistage, and impeller is arranged vertically successively.
4. a kind of sealing device for rotary shaft according to claim 3, it is characterized in that: described impeller is a two-stage, the fixed cover of spiral seal section end extends to first order impeller (311) inner circumference, and the rotary sleeve (4) of spiral seal section end extends to second level impeller (312) inner circumference.
5. a kind of sealing device for rotary shaft according to claim 4 is characterized in that: the excircle (7) that extends to the fixed cover of first order impeller inner circumference is provided with the spiral seal groove that cooperates with the spiral seal of first order impeller inner circumference.
6. according to each described a kind of sealing device for rotary shaft of claim 1 to 5, it is characterized in that: the end in the spiral seal section is provided with pressure release ring cavity (8).
7. according to each described a kind of sealing device for rotary shaft of claim 1 to 5, it is characterized in that: described parking sealer section is labyrinth seal assemblies (5).
8. a kind of sealing device for rotary shaft according to claim 6 is characterized in that: described parking sealer section is labyrinth seal assemblies (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206618306U CN201884325U (en) | 2010-12-16 | 2010-12-16 | Sealing device of rotating shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206618306U CN201884325U (en) | 2010-12-16 | 2010-12-16 | Sealing device of rotating shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201884325U true CN201884325U (en) | 2011-06-29 |
Family
ID=44181864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206618306U Expired - Lifetime CN201884325U (en) | 2010-12-16 | 2010-12-16 | Sealing device of rotating shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201884325U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003403A (en) * | 2010-12-16 | 2011-04-06 | 李廷伟 | Rotary shaft sealing device |
| CN103925368A (en) * | 2014-04-30 | 2014-07-16 | 湖北新置密封件有限公司 | Labyrinth type halt sealing device |
-
2010
- 2010-12-16 CN CN2010206618306U patent/CN201884325U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003403A (en) * | 2010-12-16 | 2011-04-06 | 李廷伟 | Rotary shaft sealing device |
| CN102003403B (en) * | 2010-12-16 | 2012-07-25 | 李廷伟 | Rotary shaft sealing device |
| CN103925368A (en) * | 2014-04-30 | 2014-07-16 | 湖北新置密封件有限公司 | Labyrinth type halt sealing device |
| CN103925368B (en) * | 2014-04-30 | 2016-01-20 | 湖北新置密封件有限公司 | A kind of mazy type shutdown sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110629 Effective date of abandoning: 20120725 |