CN113513592A - Foil piece end face air film sealing structure with boot-shaped dynamic pressure flexible sealing dam - Google Patents
Foil piece end face air film sealing structure with boot-shaped dynamic pressure flexible sealing dam Download PDFInfo
- Publication number
- CN113513592A CN113513592A CN202110551875.0A CN202110551875A CN113513592A CN 113513592 A CN113513592 A CN 113513592A CN 202110551875 A CN202110551875 A CN 202110551875A CN 113513592 A CN113513592 A CN 113513592A
- Authority
- CN
- China
- Prior art keywords
- sealing
- foil
- dam
- boot
- clamping plate
- 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.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3404—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal
- F16J15/3408—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface
- F16J15/3428—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface with a wavy surface
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3244—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with hydrodynamic pumping action
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3268—Mounting of sealing rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
- F16J15/3292—Lamellar structures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/36—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member connected by a diaphragm or bellow to the other member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a foil end face air film sealing structure with a boot-shaped dynamic pressure flexible sealing dam, which comprises a ring body, a sealing sheet, a radial annular sealing gasket, a bottom annular sealing gasket, an inner diameter clamping plate and an outer diameter clamping plate. An annular groove is formed in the upper surface of the ring body, and an annular sealing gasket at the bottom is laid at the bottom of the annular groove. The sealing sheets comprise a plurality of sealing sheets with boots and a plurality of sealing sheets without boots; the sealing sheet with the boots comprises a body, a gap and the boots; the boot-free sealing sheet comprises a body and a gap; the gaps of two adjacent sealing pieces are not communicated; the boot cover is arranged on the upper end surface of the second split body, the boot-containing sealing sheet and the boot-free sealing sheet are embedded into the annular groove to form a sealing dam, and an inner diameter clamping plate is arranged on the inner diameter side of the sealing dam; an outer diameter clamping plate is arranged on the outer diameter side of the sealing dam; the annular groove is externally connected with a circular ring platform, and a foil piece end face mechanism is arranged on the circular ring platform. The invention has the advantages of higher stability, reliability, high temperature resistance, friction resistance, long service life and the like.
Description
Technical Field
The invention relates to the field of dry gas sealing, in particular to a foil end face air film sealing structure with a boot-shaped dynamic pressure flexible sealing dam.
Background
The dry gas seal is a non-contact mechanical seal taking gas as a lubricating medium, and labyrinth seal, brush seal and the like are gradually replaced by the excellent working performance of the dry gas seal, but along with the occurrence of a high-rotation-speed and large-journal compressor, the rigid surface of the dry gas seal is easy to break at the end face, seriously abrade and the like under complex working conditions, so that the seal is damaged. When the flexible end face of the flexible end face air film sealing structure is subjected to impact disturbance, the end face flexible support generates deformation to absorb impact energy, and the purpose of protecting the sealing element is achieved.
Although the foil end face of the existing foil end face air film sealing structure has certain impact resistance, the sealing dam with a rigid surface is easy to break, seriously wear and the like on the end face of the sealing dam when encountering impact, so that the sealing device fails.
Disclosure of Invention
The invention aims to provide a foil end face air film sealing structure with a boot-shaped dynamic pressure flexible sealing dam, which can solve one or more of the technical problems.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the utility model provides a foil piece terminal surface air film seal structure with flexible sealing dam of boot shape dynamic pressure, includes rotating ring and quiet ring, and this seal structure sets up on rotating ring or quiet ring.
The sealing structure comprises a ring body, a sealing sheet, a radial annular sealing gasket, a bottom annular sealing gasket, an inner diameter clamping plate and an outer diameter clamping plate.
An annular groove is formed in the upper surface of the ring body, and the bottom annular sealing gasket is laid at the bottom of the annular groove.
The sealing sheets comprise a plurality of sealing sheets with boots and a plurality of sealing sheets without boots;
the sealing sheet with the boots comprises a body, a gap and boots; the gap divides the body into a plurality of inclined first split bodies from the upper end surface of the body downwards, and a boot protruding out of the first split bodies is arranged on the upper end surface of each first split body;
the boot-free sealing sheet comprises a body and a gap; the gap divides the body into a plurality of inclined second sub-bodies from the upper end surface of the body downwards;
the gaps of two adjacent sealing pieces are not communicated; the boot cover is arranged on the upper end face of the second split body, and the boot sealing sheet and the boot-free sealing sheet are embedded into the annular groove to form a sealing dam;
an inner diameter clamping plate is arranged on the inner diameter side of the sealing dam; a radial annular sealing gasket is arranged between the inner diameter clamping plate and the side wall of the annular groove, and a radial annular sealing gasket is arranged between the inner diameter clamping plate and the sealing dam;
an outer diameter clamping plate is arranged on the outer diameter side of the sealing dam; a radial annular sealing gasket is arranged between the outer diameter clamping plate and the side wall of the annular groove, and a radial annular sealing gasket is arranged between the outer diameter clamping plate and the sealing dam;
the annular groove is externally connected with a circular ring platform, and a foil piece end face mechanism is arranged on the circular ring platform.
Further: and an oblique elliptic cylindrical cavity is formed in the upper end surface of each split body along the oblique direction of the split body.
Further: the depth of the oblique elliptic cylinder cavity is 2-8 mu m.
Further: the gap includes perps and horizontal joint, and the horizontal joint communicates in order to form "L" shape gap with the perps below the perps, and wherein the width of perps is at 0.1 ~ 1mm, and the perps length of two adjacent sealing pieces is different to make the horizontal joint to the sealing piece bottom height difference.
Further: the sealing piece with the boot is clamped between the sealing pieces without the boot.
Further: the foil end face mechanism comprises a corrugated foil and a flat foil; the wave foil pieces are wavy, a plurality of wave foil pieces are flatly paved on the circular platform end to end, and a flat foil piece is covered on each wave foil piece; the flat foil and the wave foil are fixed at one end and free at the other end.
Further: a T-shaped groove is formed in the ring body, and the bottom of the T-shaped groove is communicated with the second mounting cavity; the second positioning block is embedded into the second mounting cavity, the fixed end of the flat foil and the fixed end of the wave foil are inserted into the T-shaped groove, and the fixed ends of the flat foil and the wave foil are extruded by the second positioning block; and the second screw enters the second mounting cavity through the second threaded hole and abuts against the second positioning block.
Further: the circumferential directions from the fixed ends to the free ends of the flat foils and the wave foils are consistent with the circumferential direction of the airflow; the upper surface of the free end of the flat foil is not lower than the upper surface of the sealing dam; the upper surface of the fixed end of the flat foil is lower than the upper surface of the sealing dam.
Further: the upper surface of the free end of the flat foil is 0.1-3 mu m higher than the upper surface of the sealing dam, and the upper surface of the fixed end of the flat foil is 1-20 mu m lower than the upper surface of the sealing dam.
Further: a first mounting cavity is formed in the outer side wall of the annular groove, and a first threaded hole penetrates through the external platform to the first mounting cavity; the first positioning block is embedded into the first mounting cavity and abuts against the outer radial annular sealing gasket; the front end of the first screw is abutted against the first positioning block through the first threaded hole.
The invention has the technical effects that:
the sealing structure provided by the invention has the flexible sealing dam with wear resistance and impact resistance and the flexible foil end face with excellent opening performance, can effectively absorb impact energy through self-adaptive deformation of the whole sealing end face, overcomes the defect of the existing foil end face air film sealing structure, and ensures the end face impact resistance of the sealing device and excellent sealing performance.
The flexible end face air film sealing structure can better adapt to the influence caused by external disturbance and working condition change, has the advantages of higher stability, reliability, high temperature resistance, friction resistance, long service life and the like, and has excellent application background in a modern industrial system.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic three-dimensional explosion view of the present invention.
FIG. 3 is a schematic view of the foil and seal arrangement of the present invention.
Fig. 4 is a schematic cross-sectional structure of the present invention.
Fig. 5 is a partially enlarged schematic view of fig. 4.
FIG. 6 is a schematic view of the ring body of the present invention.
FIG. 7 is a schematic diagram of a bump foil of the present invention.
Fig. 8 is a schematic view of a flat foil according to the invention.
Fig. 9 is a schematic view of the outer sealing sheet of the present invention.
Figure 10 is a schematic view of the inner sealing boot flap of the present invention.
Figure 11 is a schematic view of a deformed sealing sheet with a shoe.
FIG. 12 is an enlarged view of a portion of the gap before deformation of the sealing piece.
FIG. 13 is an enlarged view of a portion of the seam after deformation of the sealing piece.
Figure 14 is a schematic view of the bootless seal of the present invention.
FIG. 15 is a schematic view of a radial annular seal of the present invention.
FIG. 16 is a schematic view of a bottom annular seal of the present invention.
Fig. 17 is a schematic view of the inner diameter splint and the outer diameter splint according to the present invention.
FIG. 18 is a schematic view of the installation of the internal parts of the circular groove.
FIG. 19 is a schematic view showing how a bump foil and a flat foil are mounted.
Wherein the figures include the following reference numerals:
1-a ring body; 2-flat foil; 3-bump foil; 4-an oblique elliptic cylindrical cavity; 5-boot; 6, a gap; 7-a first radial annular gasket; 8-a second radial annular seal; 9-a third radial annular seal; 10-a fourth radial annular seal; 11-inner diameter splint; 12-outer diameter splint; 13-a first bootless seal; 14-a second sealing gasket without a boot; 15-a first boot-seal flap; 16-a second booted seal; 17-a circular platform; 18-a circular groove; 19-a first mounting cavity; 20 — a first threaded hole; 21-a first positioning block; 22 — a first screw; 23-a second mounting cavity; 24-a second locating block; 25-a second screw; 26- "T" shaped groove; 27-sealing the dam; 28-bottom annular seal.
Detailed Description
The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions are provided only for the purpose of illustrating the present invention and are not to be construed as unduly limiting the invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "" and "" the "" and the like in the description and the claims of the present application and the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1-19. A foil end face air film sealing structure with a boot-shaped dynamic pressure flexible sealing dam comprises a ring body 1, a sealing sheet, a radial annular sealing gasket, a bottom annular sealing gasket 28, an inner diameter clamping plate 11 and an outer diameter clamping plate 12.
An annular groove 18 is formed in the upper surface of the ring body 1, and the bottom annular sealing gasket 28 is laid at the bottom of the annular groove 18. The bottom annular seal 28 has a width corresponding to the width of the annular groove 18.
The sealing sheets comprise a plurality of sealing sheets with boots and a plurality of sealing sheets without boots;
the sealing piece with the boot comprises a body, a gap 6 and a boot 5; the body is divided into a plurality of inclined first split bodies by the gaps from the upper end surface of the body downwards, and a boot 5 protruding out of each first split body is arranged on the upper end surface of each first split body;
the boot-free sealing sheet comprises a body and a gap; the gap divides the body into a plurality of inclined second sub-bodies from the upper end surface of the body downwards;
the gaps of two adjacent sealing pieces are not communicated; the gaps 6 of the adjacent sealing pieces are staggered uniformly along the circumferential direction, namely the gap 6 of any sealing piece is aligned with the non-slit part of the adjacent sealing piece, so that a sealing wall is formed to prevent the medium from leaking along the radial direction.
In certain embodiments: the gap comprises a vertical gap and a transverse gap, the transverse gap is communicated with the vertical gap below the vertical gap to form an L-shaped gap, specifically, the vertical gap is obliquely cut at a certain angle, and the transverse gap is horizontally cut to form a triangular shape. And wherein the width of perps is at 0.1 ~ 1mm, and the perps length of two adjacent gasket is different to make horizontal seam to gasket bottom height difference, with the effectual gap 6 of guaranteeing two adjacent gaskets when the installation not communicate.
The boot 5 covers the upper end surface of the second split body, the boot seal piece and the boot-free seal piece are embedded into the annular groove 18 to form a seal dam 27, and an inner diameter clamping plate 11 is arranged on the inner diameter side of the seal dam 27; a radial annular sealing gasket is arranged between the inner diameter clamping plate 11 and the side wall of the annular groove 18, and the inner diameter clamping plate 11 and the sealing dam 27 are provided with radial annular sealing gaskets; an outer diameter clamping plate 12 is arranged on the outer diameter side of the sealing dam 27; a radial annular sealing gasket is arranged between the outer diameter clamping plate 12 and the side wall of the annular groove 18, and a radial annular sealing gasket is arranged between the outer diameter clamping plate 12 and the sealing dam 27.
The annular groove is externally connected with a circular ring platform 17, and a foil piece end face mechanism is arranged on the circular ring platform 17. In certain embodiments: the foil end face mechanism comprises a corrugated foil 3 and a flat foil 2; the wavy foils 3 are wavy, a plurality of wavy foils 3 are flatly laid on the circular platform 17 end to end, and a flat foil 2 is covered on each wavy foil 3; the flat foil 2 and the wave foil 3 are fixed at one end and free at the other end.
In certain embodiments: a T-shaped groove 26 is formed in the ring body 1, and the bottom of the T-shaped groove 26 is communicated with the second mounting cavity 23; a second positioning block 24 is embedded in the second mounting cavity 23, the fixed end of the flat foil 2 and the fixed end of the corrugated foil 3 are inserted into the T-shaped groove 26, and the fixed ends of the flat foil 2 and the corrugated foil 3 are pressed by the second positioning block 26; the second screw 25 enters the second mounting cavity 23 through the second threaded hole to abut against the second positioning block 24.
In certain embodiments: an oblique elliptic cylindrical cavity 4 (also called as an elliptic texture) is arranged on the upper end surface of each split body along the oblique direction of the split body.
In certain embodiments: the depth of the oblique elliptic cylinder cavity 4 is 2-8 mu m.
As shown in fig. 9, 10, in some embodiments: the sealing sheets (the first sealing sheet 16 and the second sealing sheet 15) and the sealing sheet without sealing sheet are sandwiched therebetween.
The direction of outward protrusion of the boot 5 with the boot sealing sheet is opposite, and the boot 5 just covers the adjacent boot-free sealing sheet; the sealing sheets with sealing shoe are oppositely arranged, wherein the shoe 5 of the second sealing sheet with sealing shoe 15 extends to the inner diameter side, and the shoe 5 of the other first sealing sheet with sealing shoe 16 extends to the outer diameter side, and jointly form a supporting surface.
In certain embodiments: the circumferential directions from the fixed ends to the free ends of the flat foil 2 and the wave foil 3 are consistent with the circumferential direction of the airflow; the upper surface of the free end of the flat foil 2 is not lower than the upper surface of the sealing dam 27, and the upper surface of the fixed end of the flat foil 2 is lower than the upper surface of the sealing dam 27. The wave foil 3 and the flat foil 2 play a main supporting role to protect the sealing dam from being damaged, and meanwhile, when the wave foil 3 and the flat foil 2 are supported to be invalid, the sealing dam 27 also has flexible impact resistance to protect the sealing dam 25 from being damaged, so that the sealing effect is achieved.
In certain embodiments: the upper surface of the free end of the flat foil is 0.1-3 mu m higher than the upper surface of the sealing dam, and the upper surface of the fixed end of the flat foil is 1-20 mu m lower than the upper surface of the sealing dam.
In certain embodiments: a first mounting cavity 19 is formed in the outer side wall of the annular groove 18, and a first threaded hole 20 penetrates through the external platform 17 to the first mounting cavity 24; the first positioning block 21 is embedded into the first mounting cavity 19 and abuts against the outer radial annular sealing gasket 7; the front end of the first screw 22 abuts against the positioning block 21 through the first threaded hole 20. Better sealing effect is realized by pressing gaps between parts, and the mounting mode is simpler and more convenient when internal parts are replaced and is easy to operate.
The inner side of the sealing end face adopts a mode of overlapping and installing a plurality of sealing pieces, L-shaped gaps with the same shape and size are uniformly formed in each sealing piece, and the L-shaped gaps provide space for the axial and circumferential deformation of the sealing pieces and ensure the impact resistance of the sealing end face; the sealing sheet is divided into a plurality of independent bearing units by the gap, and when the pressure of the air film changes, each unit independently deforms, so that the stability, reliability and adaptability of sealing operation are ensured;
meanwhile, the sealing piece gaps are staggered uniformly during installation, so that the leakage of a medium along the sealing end face and the bottom can be effectively prevented; the boot surface with the boot sealing sheet provides a supporting surface for the sealing end surface, and the elliptical texture on the boot surface can enhance the dynamic pressure effect of the sealing device and improve the sealing opening performance; therefore, the wave foil pieces and the sealing pieces are used as flexible supporting structures of the sealing end faces, the wave foil pieces and the sealing pieces can be deformed respectively to adapt to various working condition changes between the sealing end faces, the dynamic balance of film thickness and film pressure between the sealing end faces is stably and efficiently realized, the stability and the impact resistance of sealing operation are favorably improved, and the service life of sealing is prolonged.
The wave foil which is divided into independent units is used as an elastic support outside the sealing end face, the independent units are beneficial to the independent work of the wave foil under the action of thermal deformation and extrusion when the sealing operation is carried out, the interaction influence is reduced, the deformability of each independent unit is determined by the rigidity of the wave foil, and when the pressure of the air film changes, each independent unit generates corresponding deformation to adapt to the change of the working condition.
Compared with the traditional dry gas sealing and early foil sealing, the invention has more excellent stability, high temperature and high pressure resistance, impact resistance and sustainable operation capability under complex working conditions.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a foil piece terminal surface air film seal structure with flexible sealed dam of boots shape dynamic pressure, includes rotating ring and quiet ring, and this seal structure sets up on rotating ring or quiet ring, its characterized in that: comprises a ring body (1), a sealing sheet, a radial annular sealing gasket, a bottom annular sealing gasket (28), an inner diameter clamping plate (11) and an outer diameter clamping plate (12);
an annular groove (18) is formed in the upper surface of the ring body (1), and the bottom annular sealing gasket (28) is laid at the bottom of the annular groove (18);
the sealing sheets comprise a plurality of sealing sheets with boots and a plurality of sealing sheets without boots;
the sealing sheet with the boots comprises a body, a gap and boots; the body is divided into a plurality of inclined first split bodies by the gaps from the upper end surface of the body downwards, and a boot (5) protruding out of each first split body is arranged on the upper end surface of each first split body;
the boot-free sealing sheet comprises a body and a gap; the gap divides the body into a plurality of inclined second sub-bodies from the upper end surface of the body downwards;
the gaps of two adjacent sealing pieces are not communicated; the boot cover is arranged on the upper end face of the second split body, and the boot seal piece are embedded into an annular groove (18) to form a seal dam (27); ,
an inner diameter clamping plate (11) is arranged on the inner diameter side of the sealing dam (27); a radial annular sealing gasket is arranged between the inner diameter clamping plate (11) and the side wall of the annular groove (18), and a radial annular sealing gasket is arranged between the inner diameter clamping plate (11) and the sealing dam (27);
an outer diameter clamping plate (12) is arranged on the outer diameter side of the sealing dam (27); a radial annular sealing gasket is arranged between the outer diameter clamping plate (12) and the side wall of the annular groove (18), and a radial annular sealing gasket is arranged between the outer diameter clamping plate (12) and the sealing dam (27);
the annular groove is externally connected with a circular ring platform (17), and a foil end face mechanism is arranged on the circular ring platform (17).
2. The foil end face air film seal arrangement with a dynamic pressure flexible seal dam of shoe shape of claim 1 wherein: an oblique elliptic cylindrical cavity (4) is formed in the upper end face of each split body along the oblique direction of the split body.
3. The foil end face air film seal arrangement with a dynamic pressure flexible seal dam of shoe shape of claim 2 wherein: the depth of the oblique elliptic cylindrical cavity (4) is 2-8 mu m.
4. The foil end face air film seal arrangement with a dynamic pressure flexible seal dam of shoe shape of claim 1 wherein: the gap includes perps and horizontal joint, and the horizontal joint communicates in order to form "L" shape gap with the perps below the perps, and wherein the width of perps is at 0.1 ~ 1mm, and the perps length of two adjacent gasket is different.
5. The foil end face air film seal arrangement with a dynamic pressure flexible seal dam of shoe shape of claim 1 wherein: the sealing piece with the boot is clamped between the sealing pieces without the boot.
6. The foil end face air film seal arrangement with a dynamic pressure flexible seal dam of shoe shape of claim 1 wherein: the foil end face mechanism comprises a corrugated foil (3) and a flat foil (2); the wave foil pieces (3) are wavy, a plurality of wave foil pieces (3) are flatly laid on the circular ring platform (17) end to end, and a flat foil piece (2) is covered on each wave foil piece (3); the flat foil (2) and the wave foil (3) are fixed at one end and free at the other end.
7. The foil end face air film seal arrangement with a dynamic pressure flexible seal dam of shoe shape of claim 6 wherein: a T-shaped groove (26) is formed in the ring body (1), and the bottom of the T-shaped groove (26) is communicated with the second mounting cavity (23); a second positioning block (24) is embedded into a second mounting cavity (23), the fixed end of the flat foil (2) and the fixed end of the corrugated foil (3) are inserted into the T-shaped groove (26), and the fixed ends of the flat foil (2) and the corrugated foil (3) are extruded by the second positioning block (26); the second screw (25) enters the second mounting cavity (23) through the second threaded hole and abuts against the second positioning block (24).
8. The foil end face air film seal arrangement with a dynamic pressure flexible seal dam of shoe shape of claim 6 wherein: the circumferential directions from the fixed ends to the free ends of the flat foil (2) and the wave foil (3) are consistent with the circumferential direction of the airflow; the upper surface of the free end of the flat foil is not lower than the upper surface of the sealing dam; the upper surface of the fixed end of the flat foil is lower than the upper surface of the sealing dam.
9. The foil end face air film seal arrangement with a dynamic pressure flexible seal dam of shoe shape of claim 6 wherein: the upper surface of the free end of the flat foil is 0.1-3 mu m higher than the upper surface of the sealing dam, and the upper surface of the fixed end of the flat foil is 1-20 mu m lower than the upper surface of the sealing dam.
10. The foil end face air film seal arrangement with a dynamic pressure flexible seal dam of shoe shape of claim 1 wherein: a first mounting cavity (19) is formed in the outer side wall of the annular groove (18), and a first threaded hole (20) penetrates through the external platform (17) to the first mounting cavity (19); the first positioning block (21) is embedded into the first mounting cavity (19) and abuts against the outer radial annular sealing gasket; the front end of the first screw (22) is abutted against the first positioning block (21) through the first threaded hole (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110551875.0A CN113513592B (en) | 2021-05-20 | 2021-05-20 | Foil end face air film sealing structure with boot-shaped dynamic pressure flexible sealing dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110551875.0A CN113513592B (en) | 2021-05-20 | 2021-05-20 | Foil end face air film sealing structure with boot-shaped dynamic pressure flexible sealing dam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113513592A true CN113513592A (en) | 2021-10-19 |
| CN113513592B CN113513592B (en) | 2023-10-20 |
Family
ID=78064965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110551875.0A Active CN113513592B (en) | 2021-05-20 | 2021-05-20 | Foil end face air film sealing structure with boot-shaped dynamic pressure flexible sealing dam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113513592B (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6446976B1 (en) * | 2000-09-06 | 2002-09-10 | Flowserve Management Company | Hydrodynamic face seal with grooved sealing dam for zero-leakage |
| CN101749430A (en) * | 2009-12-25 | 2010-06-23 | 中国燃气涡轮研究院 | Finger tip sealing device and the flexible constrictor |
| CN102155269A (en) * | 2011-03-04 | 2011-08-17 | 北京航空航天大学 | Design method for gas film seal damping structure for aircraft engine rotor system and gas film seal damping structure |
| CN203791368U (en) * | 2014-01-13 | 2014-08-27 | 宛亚坤 | Coupling device |
| CN104896101A (en) * | 2015-05-26 | 2015-09-09 | 浙江工业大学 | End face gas film sealing structure for bump-type foil |
| CN104913064A (en) * | 2015-05-29 | 2015-09-16 | 浙江工业大学 | Gas film face seal structure for cantilever-type foils |
| CN204692585U (en) * | 2015-05-26 | 2015-10-07 | 浙江工业大学 | A kind of ripple foil-type paillon foil gas film face seal structure |
| CN105090512A (en) * | 2015-07-22 | 2015-11-25 | 哈尔滨工业大学 | Non-contact type dynamic-pressing foil sealing piece for rotary machine |
| CN105387213A (en) * | 2015-12-30 | 2016-03-09 | 北京交通大学 | Magnetic liquid and mechanical seal combined sealing device applied to nuclear reactor main pump seal |
| CN107269848A (en) * | 2017-07-06 | 2017-10-20 | 浙江工业大学 | Paillon foil gas film face seal structure based on magneto-shape-memory effect |
| CN107289136A (en) * | 2017-07-06 | 2017-10-24 | 南阳神鹰装备制造有限公司 | A kind of air levitation sealing structure for rotating machinery |
| CN107906208A (en) * | 2017-12-13 | 2018-04-13 | 广西科技大学 | A kind of dome camber device for sealing magnetic fluid |
| 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 |
| CN209511114U (en) * | 2019-02-15 | 2019-10-18 | 中国航发商用航空发动机有限责任公司 | Diaphragm seal, fingertip sealing structure and double-shaft seal structure |
| CN210343823U (en) * | 2019-07-07 | 2020-04-17 | 南京林业大学 | Combined non-contact double-end-face seal based on magnetic liquid seal and fluid dynamic pressure mechanical seal |
| CN112648379A (en) * | 2021-02-02 | 2021-04-13 | 昆明理工大学 | Elastic wave foil type cylindrical surface air film flexible supporting structure |
-
2021
- 2021-05-20 CN CN202110551875.0A patent/CN113513592B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6446976B1 (en) * | 2000-09-06 | 2002-09-10 | Flowserve Management Company | Hydrodynamic face seal with grooved sealing dam for zero-leakage |
| CN101749430A (en) * | 2009-12-25 | 2010-06-23 | 中国燃气涡轮研究院 | Finger tip sealing device and the flexible constrictor |
| CN102155269A (en) * | 2011-03-04 | 2011-08-17 | 北京航空航天大学 | Design method for gas film seal damping structure for aircraft engine rotor system and gas film seal damping structure |
| CN203791368U (en) * | 2014-01-13 | 2014-08-27 | 宛亚坤 | Coupling device |
| CN104896101A (en) * | 2015-05-26 | 2015-09-09 | 浙江工业大学 | End face gas film sealing structure for bump-type foil |
| CN204692585U (en) * | 2015-05-26 | 2015-10-07 | 浙江工业大学 | A kind of ripple foil-type paillon foil gas film face seal structure |
| CN104913064A (en) * | 2015-05-29 | 2015-09-16 | 浙江工业大学 | Gas film face seal structure for cantilever-type foils |
| CN105090512A (en) * | 2015-07-22 | 2015-11-25 | 哈尔滨工业大学 | Non-contact type dynamic-pressing foil sealing piece for rotary machine |
| CN105387213A (en) * | 2015-12-30 | 2016-03-09 | 北京交通大学 | Magnetic liquid and mechanical seal combined sealing device applied to nuclear reactor main pump seal |
| CN107269848A (en) * | 2017-07-06 | 2017-10-20 | 浙江工业大学 | Paillon foil gas film face seal structure based on magneto-shape-memory effect |
| CN107289136A (en) * | 2017-07-06 | 2017-10-24 | 南阳神鹰装备制造有限公司 | A kind of air levitation sealing structure for rotating machinery |
| CN107906208A (en) * | 2017-12-13 | 2018-04-13 | 广西科技大学 | A kind of dome camber device for sealing magnetic fluid |
| 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 |
| CN209511114U (en) * | 2019-02-15 | 2019-10-18 | 中国航发商用航空发动机有限责任公司 | Diaphragm seal, fingertip sealing structure and double-shaft seal structure |
| CN210343823U (en) * | 2019-07-07 | 2020-04-17 | 南京林业大学 | Combined non-contact double-end-face seal based on magnetic liquid seal and fluid dynamic pressure mechanical seal |
| CN112648379A (en) * | 2021-02-02 | 2021-04-13 | 昆明理工大学 | Elastic wave foil type cylindrical surface air film flexible supporting structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113513592B (en) | 2023-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104896101A (en) | End face gas film sealing structure for bump-type foil | |
| GB1535663A (en) | Labyrinth seal arrangement | |
| EP2957796B1 (en) | Brush seal assembly | |
| CN204692585U (en) | A kind of ripple foil-type paillon foil gas film face seal structure | |
| CN110469370B (en) | Compliant foil honeycomb sealing structure with adjustable sealing gap | |
| CN113513592B (en) | Foil end face air film sealing structure with boot-shaped dynamic pressure flexible sealing dam | |
| CN103470763B (en) | A kind of solid of rotation combination sealing arrangement | |
| CN111336254A (en) | Vane type high-temperature high-pressure gas (liquid) elastic dynamic sealing device and preparation method | |
| CN105650280A (en) | Rotary kiln sealing device and processing system with same | |
| CN202814050U (en) | Rotary kiln and combined sealing device thereof | |
| CN205780868U (en) | A kind of sealing structure | |
| CN113513593B (en) | Foil end face air film sealing structure with wear-resistant impact-resistant flexible sealing end face | |
| CN111637150B (en) | Foil hydrodynamic gas bearing system with elastic damping support structure | |
| CN209340496U (en) | Self-sealing gasket | |
| CN207018510U (en) | A kind of automobile static seal oil jacket device | |
| CN203796969U (en) | Labyrinth type shutdown seal device | |
| CN202901288U (en) | Delf-seal packing | |
| CN205896174U (en) | Combination formula graphite gaskets with dilatation joint | |
| CN113217632B (en) | High-pressure-resistant low-leakage foil end face air film sealing structure | |
| CN108775401B (en) | Mechanical sealing device | |
| CN113513594B (en) | Foil end face air film sealing structure with dynamic pressure floating sealing dam | |
| CN215634974U (en) | Double-lip framework oil seal | |
| CN219413528U (en) | Pump shaft machine and sealing device thereof | |
| CN205503542U (en) | Compressor bearing seal | |
| CN204438751U (en) | For the sealing device of malleation rotary kiln |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |