Title:
REVERSIBLE SYSTEM FOR INJECTING AND EXTRACTING GAS FOR FLUID ROTARY MACHINES
Document Type and Number:
WIPO Patent Application WO/2010/084422
Kind Code:
A3
Abstract:
Herein described is a system for injecting and extracting gas for a fluid rotating machine (10) of the type comprising at least one stator case (12), one first stage (20) which receives the gas flowing into the machine (10), one final stage (24), downstream of which the gas is discharged from the machine (10), and one or more intermediate stages (32A, 32B, 32C) arranged between the first stage (20) and the final stage (24). Each stage (20, 24, 32A, 32B, 32C) is made up of a single centrifugal rotor (18, 18A, 18B, 18C, 18D) and a fixed ducting (22A, 22B, 22C, 22D, 22E), associated to such centrifugal rotor (18, 18A, 18B, 18C, 18D) and made on the single stator case (12). The system comprises at least one first worm screw (38A, 38B) for extracting gas from the machine (10) and at least one second worm screw (36A, 36B) for injecting gas into the machine (10). Both worm screws for extracting gas (38A, 38B) and for injecting gas (36A, 36B) are operatively connected to at least one stage (20, 32A, 32B, 32C, 24) of the machine (10). It is thus possible to obtain injection and/or extraction of the gas in a reversible manner through at least one of the stages (20, 32A, 32B, 32C, 24) of the machine (10).
Inventors:
MARIOTTI GABRIELE (IT)
Application Number:
PCT/IB2010/000213
Publication Date:
September 30, 2010
Filing Date:
January 22, 2010
Export Citation:
Assignee:
NUOVO PIGNONE SPA (IT)
MARIOTTI GABRIELE (IT)
MARIOTTI GABRIELE (IT)
International Classes:
F04D27/02; F04D17/14
Foreign References:
| US1959106A | 1934-05-15 | |||
| EP0757179A1 | 1997-02-05 | |||
| US6267560B1 | 2001-07-31 | |||
| FR2040794A5 | 1971-01-22 |
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