Patent US3779881A successfully refreshed from Google Patents.
US5026252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing device for turbo engines and the like
Assignee: MTU Aero Engines AG
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Filing: 1989-08-21
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Granted: 1991-06-25
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Expires: 2009-08-21
Abstract
Abstract A sealing device is provided, specifically between engine spaces which fluidically are acted upon by a different pressure, particularly for turbo-engines, such as gas turbo-engines. The sealing device includes at least one brush sealing device non-rotatably anchored at the stator side, the free bristle ends of this brush sealing device being guided in the direction toward an engine rotor. In this case, the brush sealing device is to be constructed as a radial sliding ring sealing device. The free ends of the bristles, while forming a secondary sealing, are guided in a circumferential groove of a sliding ring which is separated at least at one circumferential point, and which, on the side facing away from the bristles, forms a self-centering primary sealing at the engine rotor.
Inventors
- 👤 Herbert Hoffelner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:57
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3284; F16J15/3288; F16J15/44; F16J15/441; F05; F05B; F05B2220/00; F05B2220/30; F05B2220/302
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
88 words
A sealing arrangement for sealing different pressure spaced from one another in a gas turbo engine of the like which has rotor means and stator means, comprising: at least one sliding ring means for surrounding the rotor means in a self centering manner to seal off a radial gap with respect to the rotor means, and at least one brush sealing means anchorable at the stator means with free brush bristle ends facing the rotor means and sealingly guidably supported at the at least one sliding ring means.
Claim 2
Dependent Claim
88 words
A sealing arrangement for sealing different pressure spaced from one another in a gas turbo engine of the like which has rotor means and stator means, comprising: at least one sliding ring means for surrounding the rotor means in a self centering manner to seal off a radial gap with respect to the rotor means, and at least one brush sealing means anchorable at the stator means with free brush bristle ends facing the rotor means and sealingly guidably supported at the at least one sliding ring means.
Claim 3
Dependent Claim
43 words
A sealing arrangement according to claim 1, wherein the at least one sliding ring means includes a slidable ring divided at one circumferential point, and wherein the free ends of the bristles are sealingly guided in a circumferential groove of the sliding ring.
Claim 4
Dependent Claim
51 words
A sealing arrangement according to claim 2, wherein, for the free ends of the bristles, an amount of bristle overlapping is selected which, over the circumference of the at least one brush sealing means, allows the sliding ring to rest against the circumference of the engine rotor in the inoperative position.
Claim 5
Dependent Claim
59 words
A sealing arrangement according to claim 2, wherein the bristles of the brush sealing means are arranged, with respect to an essentially axially symmetric radial plane of the engine, at an angle which is sloped from the exterior top toward the interior bottom, and with the free bristle ends, an axially and radially elastically supported at the sliding ring.
Claim 6
Dependent Claim
85 words
A sealing arrangement according to claim 2, wherein the bristles of the brush sealing means, by means of the sliding ring under the effect of the differential pressure (P1>P2) between the two engine spaces (R1, R2), are pressed in axial direction against a contact surface of a stationary sealing component, a free inner end of said stationary sealing component being located in the circumferential groove together with the free bristle ends and is arranged to be axially and radially spaced away from said circumferential groove.
Claim 7
Dependent Claim
65 words
A sealing arrangement according to claim 2, further including a stationary sealing component, wherein the brush sealing means is held with respect to the inner ends of the bristles between the stationary sealing component on one side and a ring-shaped stator section on the other side, which stator section is arranged essentially concentrically to the axis of and at a distance from the sliding ring.
Claim 8
Dependent Claim
38 words
A sealing arrangement according to claim 1, wherein the bristles of the brush sealing means are constructed and arranged in a predetermined manner to exclusively define the stiffness, the suspension, and the damping characteristics of an air bearing.
Claim 9
Dependent Claim
59 words
A sealing arrangement according to claim 1, wherein at least two brush sealing means are provided following one another in the manner of a labyrinth at a distance to a pair sliding ring means, and wherein a stationary sealing component is in each case non-rotatably arranged with a stator section which follows with a mutual local contacting of surfaces.
Claim 10
Dependent Claim
80 words
A sealing arrangement according to claim 1, wherein at least two stationary sealing components, being opposite one another at a distance, engage in a circumferential groove of a common sliding ring means in such a manner that the free bristle ends of two of said brush sealing means are each held at an exterior side by the groove, the sliding ring being held against the corresponding one of the two stationary sealing components by means of the differential pressure (P1>P2).
Claim 11
Dependent Claim
52 words
A sealing arrangement according to claim 1, further comprising: a plate mounting held against an inner surface of said at least one brush sealing means, a free inner end of said plate mounting being arranged axially and radially spaced away from a circumferential groove in said at least one sliding ring means.
Claim 12
Dependent Claim
52 words
A sealing arrangement according to claim 10, further comprising: a plate mounting held against an inner surface of said at least one brush sealing means, a free inner end of said plate mounting being arranged axially and radially spaced away from a circumferential groove in said at least one sliding ring means.
Claim 13
Dependent Claim
148 words
A sealing arrangement for sealing spaces with a fluid, gas or the like under different pressure from one another in a gas turbo engine or the like which has rotor means and stator means, comprising: at least one sliding ring surrounding the rotor means in a self centering manner to seal off a radial gap with respect to the rotor means, and at least one brush sealing means incorporating radially extending bristles anchorable at the stator means with its one set of ends and with its other set of ends facing the rotor means and being sealingly guidably supported in a circumferential groove of the at least one sliding ring, the at least one sliding ring being divided at one circumferential point, and during operation of the engine-being elastically disposed at the other ends of the bristles and providing a sealing cushion from the fluid at said gap.
Claim 14
Dependent Claim
148 words
A sealing arrangement for sealing spaces with a fluid, gas or the like under different pressure from one another in a gas turbo engine or the like which has rotor means and stator means, comprising: at least one sliding ring surrounding the rotor means in a self centering manner to seal off a radial gap with respect to the rotor means, and at least one brush sealing means incorporating radially extending bristles anchorable at the stator means with its one set of ends and with its other set of ends facing the rotor means and being sealingly guidably supported in a circumferential groove of the at least one sliding ring, the at least one sliding ring being divided at one circumferential point, and during operation of the engine-being elastically disposed at the other ends of the bristles and providing a sealing cushion from the fluid at said gap.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-24 | 1994-12-24 | 1995-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-24 | 1998-12-24 | 1999-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-24 | 2002-12-24 | 2003-06-25 | $7700.00 | Window Closed / Lapsed |