- Patent Title: Turboshaft engine, twin-engine helicopter equipped with such a turboshaft engine, and method for optimising the zero-power super-idle speed of such a twin-engine helicopter
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Application No.: US15128060Application Date: 2015-03-20
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Publication No.: US10371062B2Publication Date: 2019-08-06
- Inventor: Patrick Marconi , Romain Thiriet , Olivier Bedrine
- Applicant: SAFRAN HELICOPTER ENGINES
- Applicant Address: FR Bordes
- Assignee: SAFRAN HELICOPTER ENGINES
- Current Assignee: SAFRAN HELICOPTER ENGINES
- Current Assignee Address: FR Bordes
- Agency: Womble Bond Dickinson (US) LLP
- Priority: FR1452645 20140327
- International Application: PCT/FR2015/050699 WO 20150320
- International Announcement: WO2015/145043 WO 20151001
- Main IPC: F02C7/268
- IPC: F02C7/268 ; F02C9/16 ; F02C3/10 ; F02C3/113 ; B64C27/04 ; B64D27/14 ; F02C3/04
Abstract:
The invention relates to a turboshaft engine comprising a gas generator (5) that is capable of being rotated, and a free turbine (6) that is rotated by the gases of said gas generator (5), characterized in that it comprises a device (20) for spontaneously mechanically coupling said gas generator (5) and said free turbine (6) that is capable of mechanically and spontaneously connecting said gas generator (5) and said free turbine (6) as soon as the ratio of the rotational speed (NGG) of said gas generator to the rotational speed (NTL) of said free turbine reaches a predetermined threshold value.
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