CN214367751U - Cylindrical surface air film seal of bubbling type foil flexible support - Google Patents
Cylindrical surface air film seal of bubbling type foil flexible support Download PDFInfo
- Publication number
- CN214367751U CN214367751U CN202120292736.6U CN202120292736U CN214367751U CN 214367751 U CN214367751 U CN 214367751U CN 202120292736 U CN202120292736 U CN 202120292736U CN 214367751 U CN214367751 U CN 214367751U
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- Prior art keywords
- ring
- flexible support
- floating ring
- floating
- support ring
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- 239000011888 foil Substances 0.000 title claims abstract description 14
- 230000005587 bubbling Effects 0.000 title claims abstract description 13
- 238000007789 sealing Methods 0.000 abstract description 22
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 4
- 241000197194 Bulla Species 0.000 abstract description 3
- 208000002352 blister Diseases 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
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- Sealing Devices (AREA)
Abstract
The utility model relates to a cylinder air film seal of flexible supporting of tympanic bulla type foil belongs to rotation axis fluid seal technical field. The utility model comprises a front end cover, a flexible support ring, a positioning pin, a rear end cover, a floating ring, a spring, a rotating ring and a main shaft; rotatory ring coaxial arrangement is on the main shaft, and the front end housing is installed on outside machine casket, and the rear end housing is installed on outside machine casket, and spring one end is connected and is installed on the rear end cap, and the centering of floating ring is installed in rotatory ring outside, and floating ring one end is passed through the locating pin location and is installed on the front end cap, and the floating ring other end is connected and is installed on the spring other end, and flexible support ring and floating ring coaxial arrangement are outside at the floating ring. The utility model can improve the rigidity of the air film and improve the sealing performance of the cylindrical surface air film; the added double-layer flexible support ring can avoid the collision and friction of a sealing pair in a sealing environment for dealing with larger radial displacement and prevent the sealing from losing efficacy; the bubbling arrangement forms of the double-layer flexible support rings are all in-line, and the same support effect can be achieved when the main shaft rotates forwards and backwards.
Description
Technical Field
The utility model relates to a cylinder air film seal of flexible supporting of tympanic bulla type foil belongs to rotation axis fluid seal technical field.
Background
The cylindrical surface air film sealing is a novel micron-sized air film lubricating non-contact fluid sealing mode, and has the characteristics of low leakage, suitability for high sliding speed and the like. Compared with end face air film sealing, cylindrical air film sealing has the advantages of strong flexible floatability and larger radial displacement. However, at present, since the film thickness of the film is generally only a few micrometers, this leads to contact friction between the sealing pairs even in the case of very stiff films, for example if the shaft oscillates radially by a few millimeters. Therefore, the reasonable flexible supporting structure for cylindrical surface air film sealing is adopted to carry out isolation protection on the floating ring, so that the sealing shaft and the sealing surface of the floating ring are prevented from being in frictional contact and losing efficacy, and the method is an important step for perfecting the superiority of the floating ring.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a cylinder air film of flexible supporting of tympanic bulla type foil seals to improve the sealing performance that cylinder air film is sealed, reduce the leakage quantity of sealed in-process, can deal with the bigger radial displacement problem of sealed in-process simultaneously.
The utility model discloses realize according to following technical scheme: a cylindrical surface air film seal of a bubbling type foil flexible support comprises a front end cover 1, a flexible support ring 2, a positioning pin 3, a rear end cover 4, a floating ring 5, a spring 6, a rotating ring 7 and a main shaft 8; rotatory ring 7 coaxial arrangement is on main shaft 8, front end housing 1 installs on outside machine casket, rear end housing 4 installs on outside machine casket, 6 one end connections of spring are installed on rear end housing 4, 5 eccentric installations of floating ring are outside rotatory ring 7, the eccentricity of floating ring 5 and main shaft 8 is 0.3~0.5, 5 one end of floating ring is passed through locating pin 3 location and is installed on front end housing 1, 5 other ends of floating ring connect and install on 6 other ends of spring, flexible support ring 2 and 5 coaxial arrangements of floating ring are outside 5.
The flexible support rings 2 are of a double-layer structure, bubbles 9 are arranged in the two layers of flexible support rings 2, and the bubbles 9 of the inner layer of flexible support ring 2 and the bubbles 9 of the outer layer of flexible support ring 2 are arranged in a staggered and crossed mode along the circumferential direction.
The thickness of the flexible support ring 2 is 0.05-0.10 mm, the radius of the bubbling 9 of the flexible support ring 2 is 0.8-1.2 mm, and the height of the bulge is 0.25-0.30 mm.
The outer side of the rotating ring 7 is circumferentially provided with 10 grooves, and the number of the 10 grooves is 10-16.
The working principle of the cylindrical surface air film seal of the bubbling type foil flexible support is as follows: the main shaft 8 and the rotating ring 7 are in interference fit, so that the main shaft 8 and the rotating ring 7 move synchronously, and the floating ring 5 and the main shaft 8 have certain eccentricity during installation; the left end of the front end cover 1 is a low-pressure side, the right end of the rear end cover 4 is a high-pressure side, gas enters a sealing gap between the rotating ring 7 and the floating ring 5 from the high-pressure side, when the spindle 8 starts to rotate at a given rotating speed, the gas is brought to a small opening (the end with a smaller gap between the rotating ring 7 and the floating ring 5 is eccentrically arranged) from a large opening (the end with a larger gap between the rotating ring 7 and the floating ring 5 is eccentrically arranged) through a shaft due to viscous friction, an oil-holding boosting phenomenon is generated at the small opening, a gas film with the thickness of several micrometers is generated at the same time, and the dynamic pressure effect can be increased by a groove 10 formed in the rotating ring 7; when the hydrodynamic pressure borne by the floating ring 5 is greater than the sum of the gravity and the friction force of the floating ring, the floating ring 5 is pushed to move towards the geometric center, the eccentricity is reduced, the hydrodynamic pressure borne by the floating ring 5 is reduced, and when the hydrodynamic pressure is less than the sum of the gravity and the friction force, the floating ring 5 moves towards the opposite direction, so that reciprocating is carried out, the hydrodynamic pressure, the gravity and the friction force reach dynamic balance, and fluid sealing is realized; in the process, the double-layer flexible support ring 2 supports, isolates and protects the cylindrical air film, the floating ring 5 can float in a certain controllable range, meanwhile, the sealing failure of a sealing pair caused by friction contact can be avoided, and the sealing performance of the cylindrical air film can be obviously improved.
The utility model discloses following beneficial effect has:
1. the rigidity of the air film can be improved, and the sealing performance of the cylindrical air film can be improved;
2. the added double-layer flexible support ring can avoid the collision and friction of a sealing pair in a sealing environment for dealing with larger radial displacement and prevent the sealing from losing efficacy;
3. the bubbling arrangement forms of the double-layer flexible support rings are all in-line, so that the same support effect can be achieved when the main shaft rotates forwards and backwards;
4. the bubbles in the flexible supporting ring deform by themselves, so that the flexible supporting ring has the characteristics of rigidity and damping adjustment and can stably run under the working condition of extremely high rotating speed.
Drawings
FIG. 1 is a schematic view of an assembly drawing of the present invention;
FIG. 2 is a schematic sectional view of the present invention;
FIG. 3 is a schematic structural view of a middle flexible support ring according to the present invention;
fig. 4 is a structural diagram of the shape of the bubbles in the flexible support ring according to the present invention;
fig. 5 is a schematic structural view of the middle rotary ring of the present invention;
fig. 6 is a schematic structural diagram of the present invention.
The reference numbers in the figures are: 1: front end cover, 2: flexible support ring, 3: positioning pin, 4: rear end cap, 5: floating ring, 6: spring, 7: rotating ring, 8: main shaft, 9: bubbling, 10: and (4) a groove.
Detailed Description
The invention will be further described with reference to the following drawings and examples, but the scope of the invention is not limited thereto.
Example 1: as shown in fig. 1-6, a cylindrical gas film seal of a flexible support of a bubbling type foil comprises a front end cover 1, a flexible support ring 2, a positioning pin 3, a rear end cover 4, a floating ring 5, a spring 6, a rotating ring 7 and a main shaft 8; rotatory ring 7 coaxial arrangement is on main shaft 8, front end housing 1 installs on external machine casket, rear end housing 4 installs on external machine casket, 6 one end connections of spring are installed on rear end housing 4, 5 eccentric installations of ring 5 are rotatory outside 7, 5 and main shaft 8 eccentricity ratio of ring 5 are 0.3, 5 one end of ring 5 are fixed a position through locating pin 3 and are installed on front end housing 1, 5 other ends of ring 5 are connected and are installed on 6 other ends of spring, flexible support ring 2 and 5 coaxial arrangements of ring 5 are outside ring 5.
The flexible support ring 2 is of a double-layer structure, bubbles 9 are arranged in the two layers of flexible support rings 2, and the bubbles 9 of the inner layer of flexible support ring 2 and the bubbles 9 of the outer layer of flexible support ring 2 are arranged in a staggered and crossed mode along the circumferential direction.
The thickness of the flexible support ring 2 is 0.05mm, the radius of the bubbles 9 of the flexible support ring 2 is 0.8mm, and the height of the bulges is 0.25 mm.
The outer side of the rotating ring 7 is circumferentially provided with grooves 10, and the number of the grooves 10 is 12.
Example 2: as shown in fig. 1-6, a cylindrical gas film seal of a flexible support of a bubbling type foil comprises a front end cover 1, a flexible support ring 2, a positioning pin 3, a rear end cover 4, a floating ring 5, a spring 6, a rotating ring 7 and a main shaft 8; rotatory ring 7 coaxial arrangement is on main shaft 8, front end housing 1 installs on external machine casket, rear end housing 4 installs on external machine casket, 6 one end connections of spring are installed on rear end housing 4, 5 eccentric installations of ring 5 are rotatory outside 7, 5 and main shaft 8 eccentricity ratio of ring 5 are 0.4, 5 one end of ring 5 are fixed a position through locating pin 3 and are installed on front end housing 1, 5 other ends of ring 5 are connected and are installed on 6 other ends of spring, flexible support ring 2 and 5 coaxial arrangements of ring 5 are outside ring 5.
The flexible support ring 2 is of a double-layer structure, bubbles 9 are arranged in the two layers of flexible support rings 2, and the bubbles 9 of the inner layer of flexible support ring 2 and the bubbles 9 of the outer layer of flexible support ring 2 are arranged in a staggered and crossed mode along the circumferential direction.
The thickness of the flexible support ring 2 is 0.08mm, the radius of the bubbles 9 of the flexible support ring 2 is 1.0mm, and the height of the bulges is 0.25 mm.
The outer side of the rotating ring 7 is circumferentially provided with grooves 10, and the number of the grooves 10 is 14.
Example 3: as shown in fig. 1-6, a cylindrical gas film seal of a flexible support of a bubbling type foil comprises a front end cover 1, a flexible support ring 2, a positioning pin 3, a rear end cover 4, a floating ring 5, a spring 6, a rotating ring 7 and a main shaft 8; rotatory ring 7 coaxial arrangement is on main shaft 8, front end housing 1 installs on external machine casket, rear end housing 4 installs on external machine casket, 6 one end connections of spring are installed on rear end housing 4, 5 eccentric installations of ring 5 are rotatory outside 7, 5 and main shaft 8 eccentricity ratio of ring 5 are 0.5, 5 one end of ring 5 are fixed a position through locating pin 3 and are installed on front end housing 1, 5 other ends of ring 5 are connected and are installed on 6 other ends of spring, flexible support ring 2 and 5 coaxial arrangements of ring 5 are outside ring 5.
The flexible support ring 2 is of a double-layer structure, bubbles 9 are arranged in the two layers of flexible support rings 2, and the bubbles 9 of the inner layer of flexible support ring 2 and the bubbles 9 of the outer layer of flexible support ring 2 are arranged in a staggered and crossed mode along the circumferential direction.
The thickness of the flexible support ring 2 is 0.10mm, the radius of the bubbles 9 of the flexible support ring 2 is 1.2mm, and the height of the bulges is 0.30 mm.
The outer side of the rotating ring 7 is circumferentially provided with grooves 10, and the number of the grooves 10 is 16.
Claims (4)
1. A cylindrical gas film seal of a bubbling type foil flexible support is characterized in that: comprises a front end cover (1), a flexible support ring (2), a positioning pin (3), a rear end cover (4), a floating ring (5), a spring (6), a rotating ring (7) and a main shaft (8); rotatory ring (7) coaxial arrangement is on main shaft (8), front end housing (1) is installed on outside machine casket, rear end housing (4) are installed on outside machine casket, spring (6) one end is connected and is installed on rear end housing (4), floating ring (5) eccentric mounting is in rotatory ring (7) outside, floating ring (5) one end is passed through locating pin (3) location and is installed on front end housing (1), floating ring (5) other end is connected and is installed on spring (6) other end, flexible support ring (2) and floating ring (5) coaxial arrangement are in floating ring (5) outside.
2. The blister-type foil flexible supported cylindrical gas film seal according to claim 1, wherein: the flexible support ring (2) is of a double-layer structure, bubbles (9) are arranged in the two layers of flexible support rings (2), and the bubbles (9) of the inner layer flexible support ring (2) and the bubbles (9) of the outer layer flexible support ring (2) are arranged in a staggered and crossed mode along the circumferential direction.
3. The blister-type foil flexible supported cylindrical gas film seal according to claim 1, wherein: the thickness of the flexible support ring (2) is 0.05-0.10 mm, the radius of the bubbling (9) of the flexible support ring (2) is 0.8-1.2 mm, and the height of the bulge is 0.25-0.30 mm.
4. The blister-type foil flexible supported cylindrical gas film seal according to claim 1, wherein: the outer side of the rotating ring (7) is circumferentially provided with grooves (10), and the number of the grooves (10) is 10-16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120292736.6U CN214367751U (en) | 2021-02-02 | 2021-02-02 | Cylindrical surface air film seal of bubbling type foil flexible support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120292736.6U CN214367751U (en) | 2021-02-02 | 2021-02-02 | Cylindrical surface air film seal of bubbling type foil flexible support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214367751U true CN214367751U (en) | 2021-10-08 |
Family
ID=77962434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120292736.6U Active CN214367751U (en) | 2021-02-02 | 2021-02-02 | Cylindrical surface air film seal of bubbling type foil flexible support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214367751U (en) |
-
2021
- 2021-02-02 CN CN202120292736.6U patent/CN214367751U/en active Active
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