CN204692585U - A kind of ripple foil-type paillon foil gas film face seal structure - Google Patents
A kind of ripple foil-type paillon foil gas film face seal structure Download PDFInfo
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- CN204692585U CN204692585U CN201520346144.2U CN201520346144U CN204692585U CN 204692585 U CN204692585 U CN 204692585U CN 201520346144 U CN201520346144 U CN 201520346144U CN 204692585 U CN204692585 U CN 204692585U
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- paillon foil
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Abstract
A kind of ripple foil-type 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 ripple foil-type paillon foil end face, described ripple foil-type paillon foil end face comprises circular ring body, flat paillon foil, ripple paillon foil, low outside ring body, formation circular concave, raised inside ring body, formation annular steps, the upper surface of described annular steps forms sealing dam; Several ripple paillon foils are laid on the circular concave outside described sealing dam end to end, and described ripple paillon foil is wavy, are stamped a flat paillon foil above each ripple paillon foil; Described flat paillon foil and ripple paillon foil are all that one end is fixed, the other end freely, described flat paillon foil and ripple paillon foil are along the circumferential direction split into some fritters from fixed end to free end, and described flat paillon foil is all consistent with the circumferential direction of air-flow to the circumferencial direction of free end with the fixed end of ripple paillon foil; The upper surface of described flat paillon foil fixed end is lower than sealing dam, and the upper surface of described flat paillon foil free end exceeds sealing dam plane.
Description
(1) technical field
The utility model relates to mechanical end face sealing structure design field, is specifically related to a kind of ripple foil-type paillon foil gas film face seal structure, is specially adapted to the shaft end seal device of various high-speed rotating machine rotating shaft.
(2) background technique
Gas film face seal is also known as dry gas seals, it is a kind of novel mechanical seal form, current dry gas seals obtains extensive use, as shaft end seals such as compressor, pump, reactor and blower fans 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 petrochemical industry and space flight and aviation, require that dry gas seals is to high parameter (as high speed, high temperature, high pressure etc.) development, and there is higher stability and reliability and longer working life.But under high rotating speed or variable working condition condition, common dry gas seals is easy to unstability occurs, under high medium temperature operating mode, Dry Gas Seal distortion is serious, Dry Gas Seal dynamic pressure groove is easily caused to wear and tear and dry friction occurs, these situations all easily cause the inefficacy of dry gas seals, seriously even can cause the destruction of 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 very few to the research of the adaptive ability improving mechanical seal from configuration aspects.
Foil configuration just appears in the 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 " Hydrodynamicfoil face seal ", although the sealing configuration designed by this patent has certain adaptive ability, effectively can improve dry gas seals high speed operation stability, but leak-down rate is difficult to control, and the adaptive ability that will improve further under dry gas seals reply variable working condition condition need further research, this also significantly limit applying of paillon foil end face seal.
(3) summary of the invention
The present invention will overcome defect or the deficiency of existing dry gas seals and existing paillon foil end face seal, provides that a kind of high speed dynamic stability is good, leak-down rate is low, the ripple foil-type paillon foil gas film face seal structure that support stiffness is large.
The utility model is achieved through the following technical solutions:
A kind of ripple foil-type 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 ripple foil-type paillon foil end face, described ripple foil-type paillon foil end face comprises circular ring body, flat paillon foil, ripple paillon foil, low outside ring body, formation circular concave, raised inside ring body, formation annular steps, the upper surface of described annular steps forms sealing dam;
Several ripple paillon foils are laid between described sealing dam and the high pressure side of ring body end to end, and described ripple paillon foil is wavy, are stamped a flat paillon foil above each ripple paillon foil; Described flat paillon foil and ripple paillon foil are all that one end is fixed, the other end freely, described flat paillon foil and ripple paillon foil are along the circumferential direction split into some fritters from fixed end to free end, and described flat paillon foil is all consistent with the circumferential direction of air-flow to the circumferencial direction of free end with the fixed end of ripple paillon foil;
The upper surface of described flat paillon foil fixed end is lower than sealing dam, and the upper surface of described flat paillon foil free end exceeds sealing dam;
Position corresponding with the fixed end of described flat paillon foil and ripple paillon foil on described ring body has the gap perpendicular to ring body end face, described gap area installation cavity; Described gap is all inserted in the extension of described flat paillon foil and the fixed end of ripple paillon foil; Clench screw to be pressed at the top of described installation cavity by the extension of positioning block by the fixed end of described flat paillon foil and ripple paillon foil.
Further, described flat paper tinsel block fixed end upper surface is lower than sealing 1.1 ~ 10 μm, dam, and optimization range is 3 ~ 8 μm, and described flat paper tinsel block free end upper surface is higher than sealing 0.1 ~ 10 μm, dam, and optimization range is 0.5 ~ 3.5 μm.
The utility model has following beneficial effect:
The ripple foil-type paillon foil gas film face seal structure that the utility model provides, have employed ripple paillon foil as yielding support, by splitting, flat paillon foil is corresponding with split ripple paillon foil forms one by one independently action cell, thus reduce the irregular thermal distortion caused of temperature distribution, and make it that there is better adaptive ability, by the structural rigidity of ripple paper tinsel block each on control wave paillon foil, thus coordinate the distortion of each independent action unit, corresponding distortion is made in the change that flat paillon foil and ripple paillon foil can adapt to gas film pressure simultaneously, the distortion of paillon foil can affect the redistribution of mould on the one hand, both interact and reach transient equiliblium, thus the dynamic stability that raising dry gas seals runs up, the distortion of paillon foil creates the elastic damping of paillon foil itself and the Coulomb friction damping between flat paper tinsel and ripple paper tinsel, between ripple paper tinsel and seal ring on the other hand, these dampings effectively can absorb the eddy energy of dry gas seals, and suppression fluid film produces self oscillations, further increases dry gas seals operation stability.Compared with traditional dry gas seals, ripple foil-type paillon foil gas film face seal has more superior reliability, high temperature resistant and anti-high pressure ability, and longer working life.
(4) accompanying drawing explanation
Fig. 1 is the utility model ripple foil-type paillon foil gas film face seal structural representation.
Fig. 2 is the schematic diagram of seal ring in the utility model ripple foil-type paillon foil gas film face seal structure.
Fig. 3 is the schematic diagram of flat paillon foil of the present utility model.
Fig. 4 is the schematic diagram of ripple paillon foil of the present utility model.
Fig. 5 a, Fig. 5 b are ripple paillon foil paper tinsel of the present utility model arch arrangement mode schematic diagram.
Fig. 6 is flat paillon foil of the present utility model and ripple paillon foil mounting type schematic diagram.
Wherein:
1-seals dam; The flat paillon foil of 2-; 3-ripple paillon foil; 4-positioning block; 5-seal ring; 6-marks closely screw; 7-paper tinsel encircles; The flat paper tinsel block of 8-; 9-ripple paper tinsel block; The "T"-shaped groove of 10-.
(5) embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in detail.
A kind of ripple foil-type 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 ripple foil-type paillon foil end face, described ripple foil-type paillon foil end face comprises circular ring body 5, flat paillon foil 2, ripple paillon foil 3, the outside of ring body 5 is low, formation circular concave, the inner side of ring body 5 is raised, formation annular steps, and the upper surface of described annular steps forms sealing dam 1;
Several ripple paillon foils 3 are laid between described sealing dam 1 and the high pressure side of ring body 5 end to end, and described ripple paillon foil 3, in wavy, is stamped a flat paillon foil 2 above each ripple paillon foil 3; Described flat paillon foil 2 and ripple paillon foil 3 are all that one end is fixed, the other end freely, described flat paillon foil 2 and ripple paillon foil 3 are along the circumferential direction split into some fritters from fixed end to free end, and described flat paillon foil 2 is all consistent with the circumferential direction of air-flow to the circumferencial direction of free end with the fixed end of ripple paillon foil 3;
The upper surface of described flat paillon foil 2 fixed end is lower than sealing dam 1, and the upper surface of described flat paillon foil 2 free end exceeds sealing dam plane 1;
Position corresponding with the fixed end of described flat paillon foil 2 and ripple paillon foil 3 on described ring body 5 has the gap 51 perpendicular to ring body end face, and described gap 51 is communicated with an installation cavity 52; Described gap 51 is all inserted in the extension of described flat paillon foil 2 and the fixed end of ripple paillon foil 3; Clench screw 6 to be pressed at the top of described installation cavity 52 by the extension of positioning block 4 by the fixed end of described flat paillon foil 2 and ripple paillon foil 3.
The fixed end upper surface of described flat paper tinsel block 2 is 1.1 ~ 10 μm lower than the numerical value on sealing dam 1, and optimization range is 3 ~ 8 μm, and described flat paper tinsel block 2 free end upper surface is 0.1 ~ 10 μm higher than the numerical value on sealing dam 1, and optimization range is 0.5 ~ 3.5 μm.
Described flat paillon foil 2 and ripple paillon foil 3 are all that one end is fixed, the other end freely, and all from free end to fixed end radially respectively correspondence be divided into some fritters, i.e. flat paper tinsel block 8 and ripple paper tinsel block 9, this segmentation makes corresponding flat paper tinsel block and ripple paper tinsel block form an independently action cell, can reduce because of the uneven thermal distortion caused of being heated on the one hand, the adaptive performance of paillon foil gas film face seal can be improved on the other hand, adapt to variable working condition condition.
Flat paillon foil 2 and ripple paillon foil 3 fixed end to the circumferencial direction of free end and the circumferential direction of air-flow consistent, the paper tinsel pitch of arch of ripple paper tinsel block occurs along fixed end to free end direction micron-sizedly linearly to increase successively, flat paillon foil fixed end upper surface is lower than sealing 1.1 ~ 10 μm, surface, dam, and preferable range is 3 ~ 8 μm, flat paillon foil free end upper surface is higher than sealing 0.1 ~ 10 μm, surface, dam, preferable range is 0.5 ~ 3.5 μm, the pre-angle of wedge is formed when each flat paillon foil can be made like this to coordinate with the seal face of another ring, when sealing does not operate, under closing force (comprising spring force and pressure medium) effect, ripple paillon foil generation micro-deformation, seal face is closed, thus guarantee sealability, when sealing running, under the effect of dynamic pressure effect, seal face is opened, form gas dynamic pressure film, and pass through the distribution of the self adaption compatibility of deformation pressure of paillon foil, the running of dry gas seals is made to reach transient equiliblium.
During installation, the extension of the fixed end of flat paillon foil 2 and ripple paillon foil 3, and the "T"-shaped groove 10 that positioning block 4 all leaves from seal ring sidewall inserts, clench screw 6 to be screwed into from the tapped hole at the seal ring back side, thus compression positioning block 4 realizes the fixing of paillon foil, this mounting type can be convenient for changing the paillon foil that wearing and tearing occur.
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 (3)
1. a ripple foil-type 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 ripple foil-type paillon foil end face, described ripple foil-type paillon foil end face comprises circular ring body, flat paillon foil, ripple paillon foil, low outside ring body, formation circular concave, raised inside ring body, formation annular steps, the upper surface of described annular steps forms sealing dam;
Several ripple paillon foils are laid on the circular concave outside described sealing dam end to end, and described ripple paillon foil is wavy, are stamped a flat paillon foil above each ripple paillon foil; Described flat paillon foil and ripple paillon foil are all that one end is fixed, the other end freely, described flat paillon foil and ripple paillon foil are along the circumferential direction split into some fritters from fixed end to free end, and described flat paillon foil is all consistent with the circumferential direction of air-flow to the circumferencial direction of free end with the fixed end of ripple paillon foil;
The upper surface of described flat paillon foil fixed end is lower than sealing dam, and the upper surface of described flat paillon foil free end exceeds sealing dam;
Position corresponding with the fixed end of described flat paillon foil and ripple paillon foil on described ring body has the gap perpendicular to ring body end face, described gap area installation cavity; Described gap is all inserted in the extension of described flat paillon foil and the fixed end of ripple paillon foil; Mark closely screw to be pressed at the top of described installation cavity by the extension of positioning block by the fixed end of described flat paillon foil and ripple paillon foil.
2. ripple foil-type paillon foil gas film face seal structure as claimed in claim 1, is characterized in that: the upper surface of described flat paillon foil fixed end is lower than sealing 1.1 ~ 10 μm, dam, and the upper surface of described flat paillon foil free end exceeds sealing 0.1 ~ 10 μm, dam.
3. ripple foil-type paillon foil gas film face seal structure as claimed in claim 2, is characterized in that: the upper surface of described flat paillon foil fixed end is lower than sealing 3 ~ 8 μm, dam, and the upper surface of described flat paillon foil free end exceeds sealing 0.5 ~ 3.5 μm, dam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520346144.2U CN204692585U (en) | 2015-05-26 | 2015-05-26 | A kind of ripple foil-type paillon foil gas film face seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520346144.2U CN204692585U (en) | 2015-05-26 | 2015-05-26 | A kind of ripple foil-type paillon foil gas film face seal structure |
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| Publication Number | Publication Date |
|---|---|
| CN204692585U true CN204692585U (en) | 2015-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520346144.2U Withdrawn - After Issue CN204692585U (en) | 2015-05-26 | 2015-05-26 | A kind of ripple foil-type paillon foil gas film face seal structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896101A (en) * | 2015-05-26 | 2015-09-09 | 浙江工业大学 | End face gas film sealing structure for bump-type foil |
| CN109163094A (en) * | 2018-10-31 | 2019-01-08 | 中国计量大学 | A kind of paillon gas film face seal structure of extruding and dynamic pressure effect synergistic effect |
| CN109296561A (en) * | 2018-09-07 | 2019-02-01 | 上海新时达电气股份有限公司 | A kind of bearing and a kind of fan |
| CN113202929A (en) * | 2021-05-17 | 2021-08-03 | 兰州理工大学 | Dry gas sealing structure with controllable end face rigidity |
| CN113217632A (en) * | 2021-05-20 | 2021-08-06 | 中国计量大学 | High-pressure-resistant low-leakage foil end face air film sealing structure |
| CN113513592A (en) * | 2021-05-20 | 2021-10-19 | 中国计量大学 | Foil piece end face air film sealing structure with boot-shaped dynamic pressure flexible sealing dam |
| CN113513593A (en) * | 2021-05-20 | 2021-10-19 | 中国计量大学 | Foil piece end face air film sealing structure with wear-resistant impact-resistant flexible sealing end face |
-
2015
- 2015-05-26 CN CN201520346144.2U patent/CN204692585U/en not_active Withdrawn - After Issue
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896101A (en) * | 2015-05-26 | 2015-09-09 | 浙江工业大学 | End face gas film sealing structure for bump-type foil |
| CN109296561A (en) * | 2018-09-07 | 2019-02-01 | 上海新时达电气股份有限公司 | A kind of bearing and a kind of fan |
| CN109163094A (en) * | 2018-10-31 | 2019-01-08 | 中国计量大学 | A kind of paillon gas film face seal structure of extruding and dynamic pressure effect synergistic effect |
| CN113202929A (en) * | 2021-05-17 | 2021-08-03 | 兰州理工大学 | Dry gas sealing structure with controllable end face rigidity |
| CN113202929B (en) * | 2021-05-17 | 2022-02-11 | 兰州理工大学 | Dry gas sealing structure with controllable end face rigidity |
| CN113217632A (en) * | 2021-05-20 | 2021-08-06 | 中国计量大学 | High-pressure-resistant low-leakage foil end face air film sealing structure |
| CN113513592A (en) * | 2021-05-20 | 2021-10-19 | 中国计量大学 | Foil piece end face air film sealing structure with boot-shaped dynamic pressure flexible sealing dam |
| CN113513593A (en) * | 2021-05-20 | 2021-10-19 | 中国计量大学 | Foil piece end face air film sealing structure with wear-resistant impact-resistant flexible sealing end face |
| CN113513593B (en) * | 2021-05-20 | 2023-09-05 | 中国计量大学 | Foil end face air film sealing structure with wear-resistant impact-resistant flexible sealing end face |
| CN113513592B (en) * | 2021-05-20 | 2023-10-20 | 中国计量大学 | Foil end face air film sealing structure with boot-shaped dynamic pressure flexible sealing dam |
| CN113217632B (en) * | 2021-05-20 | 2023-11-03 | 中国计量大学 | High-pressure-resistant low-leakage foil end face air film sealing structure |
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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: 20151007 Effective date of abandoning: 20170322 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20151007 Effective date of abandoning: 20170322 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |