CN204784722U - Cantilever type paillon foil terminal surface air film seal structure - Google Patents
Cantilever type paillon foil terminal surface air film seal structure Download PDFInfo
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- CN204784722U CN204784722U CN201520362625.2U CN201520362625U CN204784722U CN 204784722 U CN204784722 U CN 204784722U CN 201520362625 U CN201520362625 U CN 201520362625U CN 204784722 U CN204784722 U CN 204784722U
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- paillon foil
- ring
- free end
- seal structure
- ring body
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Abstract
The utility model provides a cantilever type paillon foil terminal surface air film seal structure, includes rotating ring and quiet ring that the air film is sealed, the seal face of at least one sealing ring is cantilever type paillon foil terminal surface in rotating ring or the quiet ring, cantilever type paillon foil terminal surface encircles inboard high of body, forms the ring step including paillon foil, pin that round annular ring body, elastic material made, the upper surface of ring step forms sealed dam, lay a plurality of paillon foil end to end the ring concave surface in the sealed dam outside on, the paillon foil is the fan -shaped form along circumference evenly distributed, the one end of paillon foil is fixed with the ring body, other end freedom, the top of the unsettled stiff end at previous paillon foil of the free end of paillon foil, free end upper surface flush with sealed dam plane and are higher than the stiff end upper surface, all the circumference direction with the air current is unanimous to the circumferencial direction of free end for the stiff end of paillon foil, the paillon foil follow free end to stiff end along radially being divided into a plurality of fritters, inboard fritter width in the fritter in the outside wherein. The utility model has the characteristics of stability is good, wearing and tearing are little, longe -lived, the reliability is high, high temperature resistant, high rotational speed and adaptive are strong.
Description
(1) technical field
The utility model relates to mechanical end face sealing structure design field, is specifically related to a kind of cantilever style paillon foil gas film face seal structure, is specially adapted to the shaft end seal device of various high-speed rotating machine.
(2) background technique
Gas film face seal obtains extensive use, as various rotating machineries such as compressor, pump, reactor and blower fans as a kind of novel mechanical seal form with significant performance advantage such as its low leakage, low power consumption, long lifetime etc. on the shaft end seal of rotating machinery.Along with the fast development of modern rotating, require that mechanical seal develops to high parameter (as high speed, high temperature, high pressure etc.), and there is higher stability and reliability and longer working life, but under high rotating speed or variable working condition condition, tradition gas film face seal is easy to unstability occurs, under worst hot case, seal face distortion is serious, these situations all easily cause the inefficacy of sealing, the serious destruction that even can cause whole unit generation unrepairable, thus cause serious accident.
For the problems referred to above, researchers propose the concept of self adaption controllable mechanical sealing, but the research of current domestic this respect mainly concentrates on according to the feedback signal such as thickness, end face temperature, on, sealing phase and face pressure etc. thick by certain actuator adjustment control end facial mask, and the research improving the adaptive ability of mechanical seal from configuration aspects is very few.
Foil configuration just appears in the structural design of radial bearing as far back as nineteen twenty-eight as a kind of adaptive structure, due to foil bearing, to have dynamic stability high, high temperature resistant, impact resisting vibrating and the advantage such as low and fast-developing and be used widely is required to rotor concentricity, relative paillon foil radial bearing, foil thrust bearing occurs more late, until just there is several foil thrust bearing successively in 20 century 70s, comprise spiral flute type, piping support type, cantilever style, ripple foil-type etc., current cantilever style and ripple foil-type thrust-bearing most widely used, at aero gas turbine engine, turbo-expander, turbosupercharger, turbine refrigerator, high speed centrifugal pump, application is all had in the high-speed rotating machines such as high-speed fan, and create huge economic benefit.
Use for reference foil tablet thrust bearing correlative principle, the concept of dynamic pressure type paillon foil end face seal has been proposed abroad, and there is relevant report, as US Patent No. 0207158 " Hydrodynamicfoilfaceseal ", although the sealing configuration designed by this patent has certain adaptive ability, effectively can improve sealing high speed operation stability, but leak-down rate is difficult to control, and the adaptive ability that will improve further under sealing reply variable working condition condition need further research, this constitutional detail is more simultaneously, processing technology is complicated, and it is higher to the requirement of machining accuracy, manufacturing expense is expensive, this also significantly limit applying of paillon foil end face seal.
(3) summary of the invention
For defect or the deficiency of traditional gas film face seal and existing paillon foil end face seal, the utility model provides that a kind of high speed dynamic stability is good, leak-down rate is low, it is simple to manufacture processing, the cantilever style paillon foil gas film face seal structure that requirement on machining accuracy is relatively low.
The utility model is achieved through the following technical solutions:
1. a cantilever style paillon foil gas film face seal structure, comprises rotating ring and the stationary ring of gas film sealing; In described rotating ring or stationary ring, the seal face of at least one seal ring is cantilever style paillon foil end face, described cantilever style paillon foil end face comprises circular ring body, elastic material is made paillon foil, pin, raised inside ring body, formation annular steps, the upper surface of described annular steps forms sealing dam; Several paillon foils are laid on the annulus concave surface outside described sealing dam end to end, and described paillon foil is circumferentially equally distributed fan shape; One end and the ring body of described paillon foil are fixed, the other end freely, the free end of described paillon foil is unsettled above the fixed end of previous paillon foil 2, free end upper surface is with sealing dam planes align and higher than fixed end upper surface, the fixed end of described paillon foil is all consistent with the circumferential direction of air-flow to the circumferencial direction of free end; Described paillon foil is radially divided into some fritters from described free end to fixed end, and the fritter is wherein wider than the fritter in outside.
Further, the ring body position that the fixed end of described paillon foil is corresponding has the gap perpendicular to ring body end face, described gap area installation cavity, the extension of the fixed end of described paillon foil is all inserted described gap and is pressed on the wall of installation cavity by pin.
Further, the free end of described paillon foil is overlapped on the fixed end of respective foils on the surface under sealed medium pressure effect.
Further, the lower surface of the free end of described paillon foil arranges the lap joint of regular shape protuberance, and the cross section of described lap joint is triangle, circular arc.
The utility model has following beneficial effect:
On paillon foil, each paper tinsel block comminute width reduces from inside to outside successively along the radial direction of ring body, such segmentation makes the lifting surface area of each paper tinsel block radially also reduce successively from inside to outside, therefore the pressure distribution that radially linear velocity difference can be avoided to cause is irregular, ensure that each paper tinsel block is unanimously stressed, sealing is run more stable; When paillon foil and paillon foil overlap mutually, protuberance lap joint is set in lap-joint and ensures that there is smooth surface transition contacting point, such one side can ensure lap-joint's good contact, on the other hand, the easier slippage in contacting point when sealing the effect that makes paillon foil end face be subject to gas dynamic pressure of operating and deforming, improves paillon foil and adapts to ambient pressure change and the sensitivity that deforms.The utility model has better stability, reliability, high temperature resistant and anti-high pressure ability and longer working life compared with conventional dry hermetic seal, has simpler structure, lower requirement on machining accuracy simultaneously and larger apply potential quality compared with existing paillon foil end face seal.
(4) accompanying drawing explanation
Fig. 1 is the utility model cantilever style paillon foil gas film face seal structural representation.
Fig. 2 is the schematic diagram of ring body in the utility model cantilever style paillon foil gas film face seal structure.
Fig. 3 is paillon foil schematic diagram in the utility model cantilever style paillon foil gas film face seal structure.
Fig. 4 is the schematic diagram of paillon foil shape, arrangement mode and joint geometry in the utility model cantilever style paillon foil gas film face seal structure; Wherein Fig. 4 (a) for paillon foil end face in the utility model cantilever style paillon foil gas film face seal structure be that plane, free end are unsettled and without the structural representation of lap joint;
Fig. 4 (b) for paillon foil end face in the utility model cantilever style paillon foil gas film face seal structure be that convergence type curved surface, free end are unsettled and without the structural representation of lap joint;
Fig. 4 (c) for paillon foil end face in the utility model cantilever style paillon foil gas film face seal structure be convergence type curved surface, free end overlap joint and lap joint cross section is leg-of-mutton structural representation;
Fig. 4 (d) for paillon foil end face in the utility model cantilever style paillon foil gas film face seal structure be convergence type curved surface, free end overlap joint and lap joint cross section is fan-shaped structural representation.
In above-mentioned Fig. 1-4: 1-seals dam; 2-paillon foil; 3-pin; 4-ring body; 5-paper tinsel block; 6-locating slot.
(5) embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in detail.
With reference to shown in Fig. 1-4, a kind of cantilever style paillon foil gas film face seal structure, comprises rotating ring and the stationary ring of gas film sealing; In described rotating ring or stationary ring, the seal face of at least one seal ring is cantilever style paillon foil end face, described cantilever style paillon foil end face comprises circular ring body 4, paillon foil 2, pin 3, the inner side of ring body 4 is raised, formation annular steps, and the upper surface of described annular steps forms sealing dam 1; Several paillon foils 2 are laid on the annulus concave surface outside sealing dam 1 end to end; Described paillon foil 2 is circumferentially equally distributed fan shape, is radially divided into some fritters 5 from free end to fixed end, and wherein the fritter 5 of inner side is wider than the fritter 5 in outside; One end and the ring body 4 of described paillon foil 2 are fixed, the other end is free, the free end of described paillon foil 2 unsettled above the fixed end of previous paillon foil 2, free end upper surface is with sealing dam planes align and higher than fixed end upper surface, the fixed end of described paillon foil 2 is all consistent with the circumferential direction of air-flow to the circumferencial direction of free end.
Further, the position that the fixed end of described paillon foil 2 is corresponding has the gap perpendicular to ring body end face, described gap area installation cavity; Described gap is all inserted in the extension of the fixed end of described paillon foil; The extension of described fixed end is pressed on the wall of installation cavity by pin 3.
Further, the free end of described paillon foil 2 is overlapped on the fixed end of respective foils on the surface under sealed medium pressure effect.
When the free end of paillon foil 2 is unsettled, its adaptive performance is better, but support stiffness is less, is not suitable for high loading operating mode; When paillon foil 2 free end snaps on the paillon foil with its end-to-end, effectively can improve support stiffness, high load operating mode can be adapted to.
Further, the lower surface of the free end of described paillon foil 2 arranges the lap joint 51 of protuberance, and the cross section of described lap joint 51 is triangles, circular arc.
The side in the center of circle near ring body 4 is defined as inner side by the utility model, and the side away from the center of circle is outside.
Content described in this specification embodiment is only enumerating the way of realization that model utility is conceived; protection domain of the present utility model should not be regarded as being only limitted to the concrete form that embodiment states, protection domain of the present utility model also comprises those skilled in the art and conceives the equivalent technologies means that can expect according to the utility model.
Claims (4)
1. a cantilever style paillon foil gas film face seal structure, comprises rotating ring and the stationary ring of gas film sealing; It is characterized in that: in described rotating ring or stationary ring, the seal face of at least one seal ring is cantilever style paillon foil end face, described cantilever style paillon foil end face comprises circular ring body, elastic material is made paillon foil, pin, raised inside ring body, formation annular steps, the upper surface of described annular steps forms sealing dam; Several paillon foils are laid on the annulus concave surface outside described sealing dam end to end, and described paillon foil is circumferentially equally distributed fan shape; One end and the ring body of described paillon foil are fixed, the other end freely, the free end of described paillon foil is unsettled above the fixed end of previous paillon foil, free end upper surface is with sealing dam planes align and higher than fixed end upper surface, the fixed end of described paillon foil is all consistent with the circumferential direction of air-flow to the circumferencial direction of free end; Described paillon foil is radially divided into some fritters from described free end to fixed end, and the fritter is wherein wider than the fritter in outside.
2. cantilever style paillon foil gas film face seal structure as claimed in claim 1, it is characterized in that: the ring body position that the fixed end of described paillon foil is corresponding has the gap perpendicular to ring body end face, described gap area installation cavity, the extension of the fixed end of described paillon foil is all inserted described gap and is pressed on the wall of installation cavity by pin.
3. cantilever style paillon foil gas film face seal structure as claimed in claim 1, is characterized in that: the free end of described paillon foil is overlapped on the fixed end of respective foils on the surface under sealed medium pressure effect.
4. cantilever style paillon foil gas film face seal structure as claimed in claim 1, is characterized in that: the lower surface of the free end of described paillon foil arranges the lap joint of regular shape protuberance, and the cross section of described lap joint is triangle, circular arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520362625.2U CN204784722U (en) | 2015-05-29 | 2015-05-29 | Cantilever type paillon foil terminal surface air film seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520362625.2U CN204784722U (en) | 2015-05-29 | 2015-05-29 | Cantilever type paillon foil terminal surface air film seal structure |
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| Publication Number | Publication Date |
|---|---|
| CN204784722U true CN204784722U (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520362625.2U Withdrawn - After Issue CN204784722U (en) | 2015-05-29 | 2015-05-29 | Cantilever type paillon foil terminal surface air film seal structure |
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| CN (1) | CN204784722U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913064A (en) * | 2015-05-29 | 2015-09-16 | 浙江工业大学 | Gas film face seal structure for cantilever-type foils |
| CN107035866A (en) * | 2016-02-04 | 2017-08-11 | 青岛海尔洗衣机有限公司 | A kind of sealing structure and encapsulating method |
-
2015
- 2015-05-29 CN CN201520362625.2U patent/CN204784722U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913064A (en) * | 2015-05-29 | 2015-09-16 | 浙江工业大学 | Gas film face seal structure for cantilever-type foils |
| CN104913064B (en) * | 2015-05-29 | 2017-03-08 | 浙江工业大学 | A kind of cantilever style paillon foil gas film face seal structure |
| CN107035866A (en) * | 2016-02-04 | 2017-08-11 | 青岛海尔洗衣机有限公司 | A kind of sealing structure and encapsulating method |
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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: 20151118 Effective date of abandoning: 20171114 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20151118 Effective date of abandoning: 20171114 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |