Abstract: In an assembly with two concentric shafts, the internal shaft projecting beyond the external shaft, a seal support sleeve placed between the shafts has a conical shape and bears on a spacer mounted on the external shaft between an assembly nut of the forward end of the external shaft and a bearing, so that the nut is accessible to be unscrewed through the space between the two shafts, thus enabling the external shaft to be disassembled. The invention may be applicable to front bearings of gas turbine high pressure shafts and makes it possible to disassemble the high pressure body from the rear, without needing to disassemble equipment, such as a fan on the front of the machine, or hindering the installation of a gear.

Abstract: In a layout with two concentric shaft lines (15, 16), one of which projects beyond the other, a seal support sleeve (38) placed between them has a conical shape and bears on a spacer (40) of the external shaft line, so that an assembly nut (19) of the forward end is accessible from the back passing through the space (43) between the two shaft lines (15, 16), so that the nut can be unscrewed and the external shaft line can be disassembled. The invention may be applicable to front bearings of gas turbine high pressure shaft lines and makes it possible to disassemble the high pressure body from behind, without needing to disassemble equipment such as a fan on the front of the machine. This does not hinder the installation of a movement control gear (20).

Abstract: In an assembly with two concentric shafts, one of which projects beyond the other, a seal support sleeve placed between them has a conical shape and bears on a spacer of the external shaft, so that an assembly nut of the forward end is accessible to be unscrewed from the back through the space between the two shafts, thus enabling the external shaft to be disassembled. The invention may be applicable to front bearings of gas turbine high pressure shafts and makes it possible to disassemble the high pressure body from behind, without needing to disassemble equipment, such as a fan on the front of the machine, or hindering the installation of a gear.

Abstract: The rotor of a fan disposed in the annular noncombusted air flow duct of a urbojet propulsion engine of the bypass type is carried by a rotary body which includes the rotor assembly of a multi-stage turbine driven by noncombusted air supplied thereto by an axisymmetrical auxiliary duct which diverts noncombusted air from the primary duct of the engine just downstream of the compressor.