(19)
(11) EP 0 076 668 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
05.10.1983 Bulletin 1983/40

(43) Date of publication A2:
13.04.1983 Bulletin 1983/15

(21) Application number: 82305243

(22) Date of filing: 01.10.1982
(84) Designated Contracting States:
DE FR GB NL SE

(30) Priority: 06.10.1981 US 309239

(71) Applicant: A/S Kongsberg Väpenfabrikk
 ()

(72) Inventor:
  • Mowill, Jan
     ()

   


(54) Method of bleeding off working fluid in turbo-machines, and turbo-machines with bleed-off means


(57) 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.






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