US9322307B2
Active / In Force
US
⏱️ 5.5 years remaining
Device comprising a centrifugal separator and a drive arrangement including an impulse turbine
Assignee: Alfa Laval Corporate AB
•
Filing: 2012-05-11
•
Granted: 2016-04-26
•
Expires: 2032-05-11
Abstract
Abstract A device for cleaning a gas which is contaminated with particles, includes a centrifugal separator with a centrifugal rotor for separating the particles from the gas and a drive arrangement for rotating the centrifugal rotor about a rotational axis. The drive arrangement includes an impulse turbine drivingly connected to the centrifugal rotor and a nozzle for a pressurized fluid, the impulse turbine being arranged with buckets for receiving a jet of pressurized fluid from a nozzle directed against the buckets which are configured such that the fluid jet direction is reversed along a height of the bucket. The height of the bucket is 2-3 times the diameter of the nozzle opening.
Inventors
- 👤 Thomas Andersson Aginger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:58
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/04; B; B04; B04B; B04B5/00; B04B5/005; B04B5/12; B04B9/00; B04B9/06; F01M2013/0422
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
112 words
A device for cleaning a gas which is contaminated with particles, which device comprises a centrifugal separator with a centrifugal rotor for separating the particles from the gas and a drive arrangement for rotating the centrifugal rotor about a rotational axis, the drive arrangement comprising an impulse turbine drivingly connected to the centrifugal rotor and a nozzle for a pressurized fluid, the impulse turbine being arranged with buckets for receiving a jet of pressurized fluid from the nozzle directed against the buckets which are configured such that the fluid jet direction is reversed along a height of the bucket, wherein the bucket height is 2-3 times the diameter of the nozzle opening.
Claim 2
Independent Claim
112 words
A device for cleaning a gas which is contaminated with particles, which device comprises a centrifugal separator with a centrifugal rotor for separating the particles from the gas and a drive arrangement for rotating the centrifugal rotor about a rotational axis, the drive arrangement comprising an impulse turbine drivingly connected to the centrifugal rotor and a nozzle for a pressurized fluid, the impulse turbine being arranged with buckets for receiving a jet of pressurized fluid from the nozzle directed against the buckets which are configured such that the fluid jet direction is reversed along a height of the bucket, wherein the bucket height is 2-3 times the diameter of the nozzle opening.
Claim 3
Dependent Claim
22 words
The device according to claim 1 , wherein the height of the bucket is 2-2.5 times the diameter of the nozzle opening.
Claim 4
Dependent Claim
22 words
The device according to claim 1 , wherein the height of the bucket is 2.3 times the diameter of the nozzle opening.
Claim 5
Dependent Claim
58 words
The device according to claim 1 , wherein the impulse turbine is configured with a radius such that a ratio (V 1 /V 2 ) between the fluid jet speed and the tangential speed of the turbine at the radius where the fluid jet is arranged to hit the bucket is 2-3 during operation of the centrifugal separator.
Claim 6
Dependent Claim
27 words
The device according to claim 4 , wherein the radius of the impulse turbine is configured such that said ratio (V 1 /V 2 ) is 2.2-2.6.
Claim 7
Dependent Claim
27 words
The device according to claim 4 , wherein the radius of the impulse turbine is configured such that said ratio (V 1 /V 2 ) is 2.4.
Claim 8
Dependent Claim
25 words
The device according to claim 1 , wherein the opening of the nozzle is arranged at a distance of 0.5-5 mm from the impulse turbine.
Claim 9
Dependent Claim
46 words
The device according to claim 1 , wherein the buckets of the impulse turbine are configured with an inner curved part for reversing the fluid along the height of the bucket, which inner curved part transitions into outer straight parts diverging in a direction radially outward.
Claim 10
Dependent Claim
40 words
The device according to claim 1 , wherein the nozzle is connectable to a fluid pressure source of an internal combustion engine and the centrifugal separator is arranged for cleaning crankcase gas produced by the internal combustion engine during operation.
Claim 11
Dependent Claim
25 words
The device according to claim 9 , wherein the fluid is liquid and the fluid pressure source is a liquid pump of the combustion engine.
Claim 12
Dependent Claim
26 words
The device according to claim 10 , wherein the liquid is oil or water and the fluid pressure source is an oil or water pump respectively.
Claim 13
Dependent Claim
28 words
The device according to claim 1 , further comprising a housing for the impulse turbine and the nozzle, the housing enclosing a drive chamber of the centrifugal separator.
Claim 14
Dependent Claim
38 words
The device according to claim 12 , wherein the centrifugal separator comprises a first housing part for the centrifugal rotor, which is connectable to a second housing part forming the housing for the impulse turbine and the nozzle.
Claim 15
Dependent Claim
24 words
The device according to claim 1 , wherein the centrifugal rotor comprises a stack of separation discs for separating the particles from the gas.
Claim 16
Dependent Claim
22 words
The device according to claim 2 , wherein the height of the bucket is 2.3 times the diameter of the nozzle opening.
Claim 17
Dependent Claim
58 words
The device according to claim 2 , wherein the impulse turbine is configured with a radius such that a ratio (V 1 /V 2 ) between the fluid jet speed and the tangential speed of the turbine at the radius where the fluid jet is arranged to hit the bucket is 2-3 during operation of the centrifugal separator.
Claim 18
Dependent Claim
58 words
The device according to claim 3 , wherein the impulse turbine is configured with a radius such that a ratio (V 1 /V 2 ) between the fluid jet speed and the tangential speed of the turbine at the radius where the fluid jet is arranged to hit the bucket is 2-3 during operation of the centrifugal separator.
Claim 19
Dependent Claim
27 words
The device according to claim 5 , wherein the radius of the impulse turbine is configured such that said ratio (V 1 /V 2 ) is 2.4.
Claim 20
Dependent Claim
25 words
The device according to claim 2 , wherein the opening of the nozzle is arranged at a distance of 0.5-5 mm from the impulse turbine.
Claim 21
Dependent Claim
25 words
The device according to claim 3 , wherein the opening of the nozzle is arranged at a distance of 0.5-5 mm from the impulse turbine.
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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) | 2019-04-26 | 2019-10-26 | 2020-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2023-04-26 | 2023-10-26 | 2024-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2027-04-26 | 2027-10-26 | 2028-04-26 | $7700.00 | Pending Window |