CN107289136A - A kind of air levitation sealing structure for rotating machinery - Google Patents
A kind of air levitation sealing structure for rotating machinery Download PDFInfo
- Publication number
- CN107289136A CN107289136A CN201710547854.5A CN201710547854A CN107289136A CN 107289136 A CN107289136 A CN 107289136A CN 201710547854 A CN201710547854 A CN 201710547854A CN 107289136 A CN107289136 A CN 107289136A
- Authority
- CN
- China
- Prior art keywords
- ring
- sealing structure
- paillon foil
- foil
- annular
- 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.)
- Pending
Links
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
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
-
- 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
- F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
-
- 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
- F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
- F16J15/48—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings influenced by the pressure within the member to be sealed
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Architecture (AREA)
- Fluid Mechanics (AREA)
- Sealing Devices (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention discloses a kind of air levitation sealing structure for rotating machinery, including offer annular through-hole housing, insertion annular through-hole in sealing structure, sealing structure includes the ring-shaped flat paillon foil in insertion annular through-hole and inserts in annular through-hole and be sheathed on the ring-type ripple paillon foil of ring-shaped flat paillon foil periphery, opening is offered on the circumferencial direction of sealing structure, makes sealing structure that there is fixing end and free end；Ring-type ripple paillon foil is axially divided into some ring-type ripple foil fragments along ring-type ripple paillon foil, annular slot is offered on the inwall of housing and between per adjacent two sections of ring-types ripple foil fragment, packing ring is arranged with annular slot, packing ring outer side edges are fixed in annular slot, and inner side edge is through adjacent two sections of ring-types ripple foil fragment and extends to ring-shaped flat paillon foil outer side edges.The present invention realizes dry seal function using air suspension principle, and quantity of gas leakage is greatly decreased, and improves sealing effectiveness, meets the sealing demand of high rotating speed machinery, and low cost.
Description
Technical field
The present invention relates to mechanical field, more particularly to a kind of air levitation sealing structure for rotating machinery.
Background technology
For all kinds of rotating machineries such as air blower, compressor, seal is all essential parts.Sealing can
Be divided into static seal and the major class of dynamic sealing two, wherein, in axle and rotor joint position for dynamic sealing, existing dynamic sealing is generally
Designed compared with the slow-speed of revolution, such as labyrinth sealing, lubricating oil may be caused to throw away when axle linear resonance surface velocity is more than 5m/s.And do
Hermetic seal, mechanical seal is again mostly complicated, and cost is high.
At present, all kinds of rotating machineries such as new blower fan, compressor start progressively to drive using high-speed electric expreess locomotive, every point of rotating speed
Clock is up to tens thousand of turns or even 100,000 turns, and this proposes higher requirement to conventional seal techniques, and if in some specific working medium
Run under environment, also frequently propose that dry seal etc. is required.And not yet occur that high rotating speed can be met in the market, oil-free,
Cheap seal.
The content of the invention
For above-mentioned deficiency, knot is sealed it is an object of the invention to provide a kind of air levitation for rotating machinery
Structure, dry seal function is realized using air suspension principle, and quantity of gas leakage is greatly decreased, and improves sealing effectiveness, meets high turn
The sealing demand of fast machinery, and low cost.
The present invention is reaches that the technical scheme that above-mentioned purpose is used is：
Opened on a kind of air levitation sealing structure for rotating machinery, including a housing, the casing center direction of principal axis
Provided with an annular through-hole, it is characterised in that also including the sealing structure for being inserted in annular through-hole and being fixed in housing, this is close
Seal structure includes the ring-shaped flat paillon foil being inserted in annular through-hole and is inserted in annular through-hole and is sheathed on ring-shaped flat paillon foil
One ring-type ripple paillon foil of periphery, wherein, an opening is offered on the circumferencial direction of the sealing structure, the opening makes sealing structure
With a fixing end and a free end, the sealing structure is fixed in housing by fixing end；Along the axial direction of the ring-type ripple paillon foil
Ring-type ripple paillon foil is divided into some ring-type ripple foil fragments, on the inwall of the housing and positioned at per adjacent two sections of ring-types ripple paillon foil
An annular slot is offered between section, a packing ring is arranged with the annular slot, the packing ring outer side edges are fixed on annular slot
Interior, inner side edge is through adjacent two sections of ring-types ripple foil fragment and extends to ring-shaped flat paillon foil outer side edges.
As a further improvement on the present invention, the ring-type ripple paillon foil is corrugated sheets.
As a further improvement on the present invention, the spacing between the lateral wall of the inner side edge of the packing ring and ring-shaped flat paillon foil
≤0.05mm。
As a further improvement on the present invention, the spacing between every adjacent two sections of ring-types ripple foil fragment is 1-3mm.
As a further improvement on the present invention, the depth of the annular slot is 1.5-2.5mm.
As a further improvement on the present invention, the width of the opening is 0.5-1.5mm.
As a further improvement on the present invention, the quantity of the ring-type ripple foil fragment is 2 sections or 3 sections.
As a further improvement on the present invention, the axial length of the ring-shaped flat paillon foil is 15-50mm.
As a further improvement on the present invention, the packing ring is PEEK packing rings, and the axial width of the PEEK packing rings is 1-
3mm。
As a further improvement on the present invention, a boss is provided with the shell one end convex, is opened up on the boss
There are some fixing threaded holes, the internal diameter of the fixing threaded hole is 3-6mm.
Beneficial effects of the present invention are：
(1) air suspension technology is applied in sealing structure, forms a kind of new air seal structure；
(2) can be by axle journal and the distance controlling of inner walls in micron level, than labyrinth using air suspension sealing
Sealed millimetre-sized gap, can greatly reduce leakage rate；
(3) between ring-shaped flat paillon foil and ring-type ripple paillon foil operationally, it is to lean between pressure-air film support, sealing off gap
It is actually the high air film of pressure, this partial pressure is higher than spiral case air pressure inside, can further suppresses gas in shell and leak,
Air-tightness is far above conventional seals structure.
Above-mentioned is the general introduction of inventive technique scheme, and below in conjunction with accompanying drawing and embodiment, the present invention is done further
Explanation.
Brief description of the drawings
Fig. 1 is positive structure schematic of the invention；
Fig. 2 is sectional view of the invention；
Fig. 3 is the enlarged diagram that packing ring of the present invention is placed.
Embodiment
Further to illustrate the present invention to reach technological means and effect that predetermined purpose is taken, below in conjunction with accompanying drawing
And preferred embodiment, the embodiment detailed description to the present invention.
Fig. 1 and Fig. 2 are refer to, the embodiment of the present invention provides a kind of air levitation sealing structure for rotating machinery,
Including a housing 1, an annular through-hole 11 is offered on the central axis direction of housing 1.The present embodiment sealing structure also includes insertion
In the sealing structure 2 that annular through-hole 11 is interior and is fixed in housing 1, the sealing structure 2 includes being inserted in annular through-hole 11
One ring-shaped flat paillon foil 21 and the ring-type ripple paillon foil 22 for being inserted in annular through-hole 11 and being sheathed on the periphery of ring-shaped flat paillon foil 21,
In the present embodiment, the ring-type ripple paillon foil 22 is corrugated sheets.
In the present embodiment, as shown in figure 1, offering an opening 23, the opening on the circumferencial direction of the sealing structure 2
23 make sealing structure have a fixing end 25 and a free end 24, and the free end 24 can move freely, and the sealing structure 2 passes through solid
Fixed end 25 is fixed in housing 1, wherein, it is fixing end 25 along rotation direction W fronts.In the present embodiment, the width of the opening 23
For 0.5-1.5mm, it is preferred that the width of the opening 23 is 1mm.
In the present embodiment, as shown in Figure 2 and Figure 3, ring-type ripple paillon foil 22 is split along the axial direction of the ring-type ripple paillon foil 22
Into some ring-type ripple foil fragments 221, and often, the spacing between adjacent two sections of ring-type ripples foil fragment 221 is 1-3mm；In the housing 1
Inwall on and positioned at per an annular slot 12 is offered between adjacent two sections of ring-type ripples foil fragment 221, in the present embodiment, should
The depth b2 of annular slot 12 is 1.5-2.5mm, meanwhile, a packing ring 3 is arranged with the annular slot 12, the outside of packing ring 3
While be fixed in annular slot 12, inner side edge is through adjacent two sections of ring-type ripples foil fragment 221 and extends to ring-shaped flat paillon foil
Spacing b1≤0.05mm between 21 outer side edges, and the inner side edge of the packing ring 3 and the lateral wall of ring-shaped flat paillon foil 21.
For the quantity for the ring-type ripple foil fragment 221 being divided into, determined with specific reference to inside and outside differential pressure, pressure difference is divided into greatly very much
3 sections, less then 2 sections, the i.e. quantity of the ring-type ripple foil fragment 221 of segmentation are 2 sections or 3 sections.
In the present embodiment, the external diameter of housing 1, ring-shaped flat paillon foil 21 are determined according to use environment (spiral case and axle journal) size
Internal diameter and axial length.The size of the ring-shaped flat paillon foil 21 is determined according to journal size and tolerance fit, and it is straight with axle journal
Connect laminating contact, it is preferred that the axial length of the present embodiment ring-shaped flat paillon foil 21 is 15-50mm, certainly, for large scale type
The axial length of ring-shaped flat paillon foil 21 can be lengthened suitably.
Meanwhile, the packing ring 3 is PEEK packing rings, and the axial width of the PEEK packing rings is 1-3mm.
In the present embodiment, a boss 13 is provided with one end convex of housing 1, is offered on the boss 13 some
Fixing threaded hole 131, so that the parts such as housing 1 and spiral case are connected.In the present embodiment, it is preferred that the quantity of the fixing threaded hole is 6
It is individual, and the internal diameter of the fixing threaded hole 131 is 3-6mm.
When the axle journal being inserted in annular through-hole 11 is rotated, gas can enter between ring-shaped flat paillon foil 21 and axle journal, pole
High dynamic pressure expands outwardly ring-shaped flat paillon foil 21, and air-flow forms micron-sized air film between axle journal and ring-shaped flat paillon foil 21,
The direct friction of axle journal and ring-shaped flat paillon foil 21 is avoided, while air film has high dynamic pressure, further strengthens sealing effectiveness.Ring
After the flat paillon foil 21 of shape is expanded, spacing further reduces between ring-shaped flat paillon foil 21 and packing ring 3, has completely enclosed ring-type ripple paillon foil 22
The gap between ring-shaped flat paillon foil 21, prevents gas from being leaked between gap, so as to complete sealedly all work.
The emphasis of the present invention is essentially consisted in：
(1) air suspension technology is applied in sealing structure, forms a kind of new air seal structure；
(2) can be by axle journal and the distance controlling of inner walls in micron level, than labyrinth using air suspension sealing
Sealed millimetre-sized gap, can greatly reduce leakage rate；
(3) between ring-shaped flat paillon foil and ring-type ripple paillon foil operationally, it is to lean between pressure-air film support, sealing off gap
It is actually the high air film of pressure, this partial pressure is higher than spiral case air pressure inside, can further suppresses gas in shell and leak,
Air-tightness is far above conventional seals structure.
The above described is only a preferred embodiment of the present invention, be not intended to limit the scope of the present invention,
Therefore the technical characteristic identical or approximate with the above embodiment of the present invention is used, and obtained other structures, the guarantor in the present invention
Within the scope of shield.
Claims (10)
1. opened up on a kind of air levitation sealing structure for rotating machinery, including a housing, the casing center direction of principal axis
There is an annular through-hole, it is characterised in that also including the sealing structure for being inserted in annular through-hole and being fixed in housing, the sealing
Structure includes the ring-shaped flat paillon foil being inserted in annular through-hole and is inserted in annular through-hole and is sheathed on outside ring-shaped flat paillon foil
The ring-type ripple paillon foil enclosed, wherein, an opening is offered on the circumferencial direction of the sealing structure, the opening has sealing structure
There are a fixing end and a free end, the sealing structure is fixed in housing by fixing end；Will along the axial direction of the ring-type ripple paillon foil
Ring-type ripple paillon foil is divided into some ring-type ripple foil fragments, on the inwall of the housing and positioned at per adjacent two sections of ring-types ripple foil fragment
Between offer an annular slot, a packing ring is arranged with the annular slot, the packing ring outer side edges are fixed in annular slot,
Inner side edge is through adjacent two sections of ring-types ripple foil fragment and extends to ring-shaped flat paillon foil outer side edges.
2. the air levitation sealing structure according to claim 1 for rotating machinery, it is characterised in that the ring-type
Ripple paillon foil is corrugated sheets.
3. the air levitation sealing structure according to claim 1 or 2 for rotating machinery, it is characterised in that described
Spacing≤0.05mm between the inner side edge of packing ring and the lateral wall of ring-shaped flat paillon foil.
4. the air levitation sealing structure according to claim 1 or 2 for rotating machinery, it is characterised in that per phase
Spacing between adjacent two sections of ring-type ripple foil fragments is 1-3mm.
5. the air levitation sealing structure according to claim 1 or 2 for rotating machinery, it is characterised in that described
The depth of annular slot is 1.5-2.5mm.
6. the air levitation sealing structure according to claim 1 or 2 for rotating machinery, it is characterised in that described
The width of opening is 0.5-1.5mm.
7. the air levitation sealing structure according to claim 1 or 2 for rotating machinery, it is characterised in that described
The quantity of ring-type ripple foil fragment is 2 sections or 3 sections.
8. the air levitation sealing structure according to claim 1 or 2 for rotating machinery, it is characterised in that described
The axial length of ring-shaped flat paillon foil is 15-50mm.
9. the air levitation sealing structure according to claim 1 or 2 for rotating machinery, it is characterised in that described
Packing ring is PEEK packing rings, and the axial width of the PEEK packing rings is 1-3mm.
10. the air levitation sealing structure according to claim 1 or 2 for rotating machinery, it is characterised in that in institute
Shell one end convex is stated provided with a boss, some fixing threaded holes are offered on the boss, the internal diameter of the fixing threaded hole is 3-
6mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710547854.5A CN107289136A (en) | 2017-07-06 | 2017-07-06 | A kind of air levitation sealing structure for rotating machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710547854.5A CN107289136A (en) | 2017-07-06 | 2017-07-06 | A kind of air levitation sealing structure for rotating machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107289136A true CN107289136A (en) | 2017-10-24 |
Family
ID=60100037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710547854.5A Pending CN107289136A (en) | 2017-07-06 | 2017-07-06 | A kind of air levitation sealing structure for rotating machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107289136A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110652952A (en) * | 2018-06-29 | 2020-01-07 | 广东美的白色家电技术创新中心有限公司 | Seal ring and rotary device |
| CN111305911A (en) * | 2020-02-25 | 2020-06-19 | 东南大学 | Elastic foil composite cylindrical surface texture sealing device |
| 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 |
| CN113513594A (en) * | 2021-05-20 | 2021-10-19 | 中国计量大学 | Foil end face air film sealing structure with dynamic pressure floating sealing dam |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5498083A (en) * | 1994-12-15 | 1996-03-12 | Air Products And Chemicals, Inc. | Shimmed three lobe compliant foil gas bearing |
| US20040207158A1 (en) * | 2001-07-06 | 2004-10-21 | Agrawal Giridhari L. | Hydrodynamic foil face seal |
| WO2016102182A1 (en) * | 2014-12-22 | 2016-06-30 | Robert Bosch Gmbh | Foil bearing, method for setting a gap geometry of a foil bearing, and corresponding production method of a foil bearing |
| CN106402146A (en) * | 2016-10-12 | 2017-02-15 | 哈尔滨工业大学 | Gas radial foil bearing with axial flat foil thickness changing |
-
2017
- 2017-07-06 CN CN201710547854.5A patent/CN107289136A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5498083A (en) * | 1994-12-15 | 1996-03-12 | Air Products And Chemicals, Inc. | Shimmed three lobe compliant foil gas bearing |
| US20040207158A1 (en) * | 2001-07-06 | 2004-10-21 | Agrawal Giridhari L. | Hydrodynamic foil face seal |
| WO2016102182A1 (en) * | 2014-12-22 | 2016-06-30 | Robert Bosch Gmbh | Foil bearing, method for setting a gap geometry of a foil bearing, and corresponding production method of a foil bearing |
| CN106402146A (en) * | 2016-10-12 | 2017-02-15 | 哈尔滨工业大学 | Gas radial foil bearing with axial flat foil thickness changing |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110652952A (en) * | 2018-06-29 | 2020-01-07 | 广东美的白色家电技术创新中心有限公司 | Seal ring and rotary device |
| CN110652952B (en) * | 2018-06-29 | 2021-03-26 | 广东美的白色家电技术创新中心有限公司 | Seal ring and rotary device |
| CN111305911A (en) * | 2020-02-25 | 2020-06-19 | 东南大学 | Elastic foil composite cylindrical surface texture sealing device |
| 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 |
| CN113513594A (en) * | 2021-05-20 | 2021-10-19 | 中国计量大学 | Foil end face air film sealing structure with dynamic pressure floating sealing dam |
| 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 |
| CN113513594B (en) * | 2021-05-20 | 2024-03-19 | 中国计量大学 | Foil end face air film sealing structure with dynamic pressure floating sealing dam |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20191025 |