Abstract: A toolbar with a longitudinal axis and a machining tool for machining a workpiece, the toolbar comprising at least one accelerometer configured to generate an electric signal proportional to the velocity of the toolbar along a direction; at least one piezoelectric actuator; and a control logic unit, operatively connected to the at least one accelerometer and to the at least one piezoelectric actuator, wherein control logic unit is configured to drive the at least one piezoelectric actuator by a driving signal proportional to the velocity derived from at least one accelerometer adapted to compensate the torque and the vibrations on the toolbar.

Abstract: A method for manufacturing a stage of a steam turbine comprising the steps of milling a block of material to define a sector having a plurality of blades, each blade having an external surface; machining an opening in the external surface of at least one of the blades; machining a cavity in fluid communication with the opening; the step of machining the cavity being performed by wire electric discharge machining.

Abstract: A system includes a steam turbine. The steam turbine includes an outer casing and an inner casing disposed within the outer casing. The inner casing is horizontally split in an axial direction into an upper inner casing portion and a lower inner casing portion. The steam turbine also includes an impulse stage disposed within the inner casing, wherein the inner casing is configured to provide full arc admission of a fluid to the impulse stage. The steam turbine further includes at least one reaction stage having multiple blades. The at least one reaction stage is integrated within the inner casing.

Abstract: A system includes a steam turbine. The steam turbine includes an outer casing and an inner casing disposed within the outer casing. The inner casing is horizontally split in an axial direction into an upper inner casing portion and a lower inner casing portion. The steam turbine also includes an impulse stage disposed within the inner casing, wherein the inner casing is configured to provide full arc admission of a fluid to the impulse stage. The steam turbine further includes at least one reaction stage having multiple blades. The at least one reaction stage is integrated within the inner casing.

Abstract: A system includes a steam turbine. The steam turbine includes an outer casing and an inner casing disposed within the outer casing. The inner casing is horizontally split in an axial direction into an upper inner casing portion and a lower inner casing portion. The steam turbine also includes an impulse stage disposed within the inner casing, wherein the inner casing is configured to provide full arc admission of a fluid to the impulse stage. The steam turbine further includes at least one reaction stage having multiple blades. The at least one reaction stage is integrated within the inner casing.

Abstract: A method for manufacturing a stage of a steam turbine comprising the steps of milling a block of material to define a sector having a plurality of blades, each blade having an external surface; machining an opening in the external surface of at least one of the blades; machining a cavity in fluid communication with the opening; the step of machining the cavity being performed by wire electric discharge machining.

Abstract: The method is used for manufacturing a blade of a turbomachine comprising an airfoil portion; according thereto at least one external or internal surface of the airfoil portion is obtained by wire electric discharge machining; this is allowed by designing these surfaces as “ruled surfaces” or very close to such kind of surfaces; this method is particularly effective, for forming internal cavities of hollow stator blades of steam turbines; this method allows to manufacture in a single piece hollow blades having root portions and shroud portions. Blade of a turbomachine with an internal cavity wherein the surface of the airfoil of the blade inside the cavity defines grooves perpendicular to the axis of the turbomachine.

Abstract: A stator blade diaphragm ring includes a plurality of stator blades each having a root and a radial pin receiver. The diaphragm ring further includes a first ring having a plurality of slots, wherein each slot is engaged by the root of one of the plurality of stator blades and a second ring having a plurality of radial through passageways, wherein each radial through passageway is aligned with the radial pin receiver of one of the plurality of stator blades. The diaphragm also includes a plurality of pins, wherein each pin extends from one of the radial through passageways into the radial pin receiver of one of the plurality of stator blades.

Abstract: A system includes a steam turbine. The steam turbine includes an outer casing and an inner casing disposed within the outer casing. The inner casing is horizontally split in an axial direction into an upper inner casing portion and a lower inner casing portion. The steam turbine also includes an impulse stage disposed within the inner casing, wherein the inner casing is configured to provide full arc admission of a fluid to the impulse stage. The steam turbine further includes at least one reaction stage having multiple blades. The at least one reaction stage is integrated within the inner casing.