| 摘要 |
The invention relates to an emergency supply unit (1) with a ram-air turbine (2) which can be driven by an air stream (14) and with an energy converter (4) for at least partly maintaining the functioning of a hydraulic system and/or electrical system on board an aircraft in an emergency situation, wherein the energy converter (4) can be driven by means of the ram-air turbine (2) and the emergency supply unit (1) can selectively be brought into a standby mode or into an operating mode. According to the invention, at least the ram-air turbine (2) is surrounded substantially concentrically by a casing (5) forming a flow channel (6) and the energy converter (4) is directly coupled to the ram-air turbine (2) via a drive shaft (3) and the air stream (14) can be delivered to the ram-air turbine (2) through at least one air inlet (9, 17, 18), wherein the spatial position of the ram-air turbine (2) remains substantially unchanged when changing between the standby mode and the operating mode. The integration of the ram-air turbine (2) into the flow channel (6) results in a very compact and space-saving design of the emergency supply unit (1) according to the invention, thus offering a plurality of additional installation options, for example in the region of the landing flap rail covering (8) below a wing (7) of an aircraft. Moreover, the substantially completely encapsulated formation of the emergency supply unit (1) without a pivot arm and with direct coupling of the ram-air turbine (2) to the energy converter (4) through the drive shaft (3) is structurally simple and therefore permits largely maintenance-free operation with greater fail safety.
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