EP0076668A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Turbo-machines with bleed-off means
Assignee: Kongsberg Gruppen ASA
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Filing: 1982-10-01
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Granted: —
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Expires: 2002-10-01
Abstract
Abstract In a turbo-machine comprising a compressor (1) including a labyrinth seal (5) and a turbine (3) including an exhaust gas diffuser (4), air leaking through the labyrinth seal (5) of the compressor (1) is bled off and used as a driving medium for removing exhaust gas from boundary layers or vortex flows in the exhaust gas diffuser (4). Since the pressure of the exhaust gas to be removed from the exhaust gas diffuser (4) is below the ambient pressure, suction has to be established to remove the desired gas from the boundary layers or vortex flows. This suction is established by an ejector or a pump (9) which is driven by the energy of the compressed leakage air bled from the compressor (1). Such a pump (9) may be driven by a turbine (8) driven by the leakage air.
Inventors
- 👤 Jan Mowill
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 11:41
CPC Classifications
F; F04; F04D; F04D27/00; F04D27/02; F04D27/0207; F04D27/0215; F01; F01D; F01D15/00; F01D15/08; F04D25/00; F04D25/02; F04D25/04; F05; F05D; F05D2260/00; F05D2260/60; F05D2260/601
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
90 words
A method of improving the overall engine efficiency of a turbo-machine comprising an air compressor (1) and a gas turbine (3) including an exhaust gas diffuser (4), by bleeding off a part of the fluid working medium from boundary layers or vortex regions of the exhaust gas diffuser (4), characterized by bleeding off leakage air leaking through a labyrinth seal (5) of the compressor (1) and using the energy of said leakage air to draw off by suction said part of the working medium from said exhaust gas diffuser (4).
Claim 2
Independent Claim
90 words
A method of improving the overall engine efficiency of a turbo-machine comprising an air compressor (1) and a gas turbine (3) including an exhaust gas diffuser (4), by bleeding off a part of the fluid working medium from boundary layers or vortex regions of the exhaust gas diffuser (4), characterized by bleeding off leakage air leaking through a labyrinth seal (5) of the compressor (1) and using the energy of said leakage air to draw off by suction said part of the working medium from said exhaust gas diffuser (4).
Claim 3
Dependent Claim
40 words
A method according to claim 1, characterized by feeding said leakage air to a jet ejector and bleeding off said working fluid from said exhuast gas diffuser (4) by connecting the suction inlet of said ejector to said diffuser (4).
Claim 4
Dependent Claim
48 words
A method according to claim 1, characterized by feeding said leakage air to an auxiliary gas turbine (8) to drive said auxiliary turbine (8), driving an auxiliary pump (9) by said auxiliary turbine (8), and connecting the suction inlet of said auxiliary pump (9) to said diffuser (4).
Claim 5
Dependent Claim
154 words
A turbo-machine such as a turbo-charger or a gas turbine engine having a compressor assembly (1) including a labyrinth seal (5), and a turbine assembly (3) including an exhaust gas diffuser (4), characterized by an energy conversion means which is operated by compressed air leaking through said labyrinth seal (5) and supplies energy for removing working medium by suction from a boundary layer or vortex flow in said exhaust gas diffuser (4), said energy conversion means comprising a first conduit (6) connected at one end to the low pressure side of said labyrinth seal (5) of said compressor assembly (l) to receive air leaking through said seal (5), and connected at the other end to a pump means (8,9), a second conduit connected at one end to the suction inlet of said pump means (8,9) and connected at the other end to said boundary layer or vortex flow of said exhaust gas diffuser (4).
Claim 6
Dependent Claim
154 words
A turbo-machine such as a turbo-charger or a gas turbine engine having a compressor assembly (1) including a labyrinth seal (5), and a turbine assembly (3) including an exhaust gas diffuser (4), characterized by an energy conversion means which is operated by compressed air leaking through said labyrinth seal (5) and supplies energy for removing working medium by suction from a boundary layer or vortex flow in said exhaust gas diffuser (4), said energy conversion means comprising a first conduit (6) connected at one end to the low pressure side of said labyrinth seal (5) of said compressor assembly (l) to receive air leaking through said seal (5), and connected at the other end to a pump means (8,9), a second conduit connected at one end to the suction inlet of said pump means (8,9) and connected at the other end to said boundary layer or vortex flow of said exhaust gas diffuser (4).
Claim 7
Dependent Claim
64 words
5 . A turbo-machine according to claim 4, wherein said pump means comprises an auxiliary gas turbine (8) and pump (9) assembly, said auxiliary turbine (8) and pump (9) being operably connected so that said turbine (8)drives said pump (9), and said other end of said first conduit (6) is connected to the inlet of said auxiliary turbine (8) to drive said turbine (9).
Claim 8
Dependent Claim
15 words
A turbo-machine improvement according to claim 4, wherein said pump means comprises a jet ejector.
References Cited (Backward Citations)
No citation records indexed.
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