Abstract: An axial flow turbine comprising a casing, a rotor having an axial rotational axis and rotatably mounted into the casing, at least one set of a plurality of moving blades supported by the rotor; and at least one diaphragm having an outer ring, an inner ring, concentric to the outer ring, and a plurality of static blades mounted therebetween, at least the outer ring being split in an upper half and a lower half along a vertical joint plane. The turbine diaphragm comprises an assembly system for assembling the upper half to the lower half while allowing the upper half and the lower half to move axially relative to each other.

Abstract: An axial flow turbine comprising a casing, a rotor having an axial rotational axis and rotatably mounted into the casing, at least one set of a plurality of moving blades supported by the rotor; and at least one diaphragm having an outer ring, an inner ring, concentric to the outer ring, and a plurality of static blades mounted therebetween, at least the outer ring being split in an upper half and a lower half along a vertical joint plane. The turbine diaphragm comprises an assembly system for assembling the upper half to the lower half while allowing the upper half and the lower half to move axially relative to each other.

Abstract: A design for a casing of a large turbine is described with the casing including at least a front section, a middle section and an end section designed such that changes to the mold of the casing required to provide for a change in rotational speed to adapt the turbine to a different power grid frequency are limited to the mold for the middle section of the casing.

Abstract: An installation includes a high pressure steam turbine module, a medium pressure steam turbine module, and at least one low pressure steam turbine module, sealing devices being positioned between a rotating turbine shaft and corresponding casings of the various turbine modules, each of the modules include a main chamber in which the turbine is housed. The installation also includes a first collection chamber positioned in the casing of the high pressure module to collect the steam leaks leaving the high pressure module through its sealing device at a pressure greater than atmospheric pressure, and an injection chamber positioned in the casing of the low pressure module and connected by a first circuit to the first collection chamber such that the steam is transferred from the first collection chamber toward the injection chamber, and then toward the main chamber of the low pressure module through its sealing device.

Abstract: A design for a casing of a large turbine is described with the casing including at least a front section, a middle section and an end section designed such that changes to the mold of the casing required to provide for a change in rotational speed to adapt the turbine to a different power grid frequency are limited to the mold for the middle section of the casing.