Abstract:
An assembly of airfoils in a turbine engine, the assembly comprising: at least three successive axially stacked rows of airfoils in one of a compressor and a turbine: a first airfoil row, a second airfoil row, and a third airfoil row; wherein the first airfoil row and the third airfoil row each comprise one of a row of rotor blades and a row of stator blades, and the second airfoil row comprises the other; and wherein at least a majority of the mid-channel points of the airfoils in the third airfoil row are positioned circumferentially within +/−25% pitch of the third airfoil row with respect to the location at which a wake flow during a selected operating condition from the first airfoil row is determined to enter the third airfoil row.
Abstract:
A turbine (100) of a turbine installation, especially a steam turbine of a steam turbine installation, includes at least one radial or diagonal turbine stage (120) with radial or diagonal inflow and axial outflow, and also at least one axial turbine stage (121-125) with axial inflow and axial outflow. The at least one radial or diagonal turbine stage (120) forms the first stage of the turbine (100) and the at least one axial turbine stage (121-125) is arranged downstream of the radial or diagonal turbine stage (121) as an additional stage of the turbine. The at least one radial or diagonal turbine stage (120) has a higher temperature resistance than the at least one axial turbine stage (121-125). The turbine (100) makes it possible to significantly increase the process temperature of the steam turbine installation, wherein measures for increasing the temperature resistance need only to be adopted for components of the radial or diagonal turbine stage (120).
Abstract:
An axial-flow pump employs an increased boss ratio Dh/Dt, wherein Dh is the hub diameter of a rotary shaft of a rotor, and Dt is the tip diameter of impeller vanes of the rotor. Specifically, the boss ratio is 0.65 to 0.85, preferably 0.7 to 0.8.
Abstract:
A steam turbine includes a turbine high pressure section, a turbine intermediate pressure section and a turbine low pressure section, in which at least two or more of these pressure sections are combined together, and a turbine rotor which is subjected to a gradient thermal treatment at different thermal treating temperatures at respective pressure sections is rotatably supported by bearings and accommodated in a turbine casing, and in a case where an axial distance from a setting position of a turbine movable blade of a final stage of the turbine low pressure section to a setting position of a partition plate disposed at a time when the gradient thermal treatment is performed to each of the pressure sections at different thermal treating temperature is defined as A, a blade length of the turbine movable blade is defined as B, and an axial distance from a prior stage of the final stage of the turbine low pressure section to the setting position of the partition plate is defined as C, the setting position of the partition plate is set in a range of (A/B)≧0.9 and C≧300 mm.
Abstract:
A steam turbine-driven generator for generating electric power is comprised of an electric generator having a vertical shaft journalled for rotation between bearings contained in a generator housing. An axial flow impulse turbine wheel with peripheral vanes is secured to an unsupported upper end of the shaft protruding from the top of the generator housing. The turbine wheel is enclosed within a turbine housing secured to the top of the generator housing. The turbine housing includes an inlet and an outlet for accommodating a through flow of steam, with internally arranged nozzles for directing the steam flow against the vanes of the turbine wheel.
Abstract:
A turbomachine having a stationary housing and a rotatable rotor mounted therein and including a series of rotor blade rings carried by the rotor and a series of guide vane rings carried by the housing, the guide vane rings and the rotor blade rings being disposed in mutually alternating relationship, further includes means defining an annular space located forward of the first rotor blade ring of the series of rotor blade rings, flow medium supply means communicating with the annular space for supplying flow medium thereto, the annular space extending radially outwardly and along the entire periphery of the turbomachine for producing a torsional flow of the flow medium, the rotor having a shaft formed with a collar, and the series of rotor blade rings including a first blade ring mounted on the collar directly behind the annular space and having a diameter greater than that of the succeeding blade rings of the series, whereby the flow medium supplied to the annular space axially impinges directly on the first blade ring without being initially guided by any guide vane rings.
Abstract:
A multiple re-entry compressor of the kind set forth in USA Patent application Ser. No. 335,162 now U.S. Pat. No. 3,869,220 is described having inter cooling between successive passes of the rotor blading. A further improvement is described in which variable aperture arcuate segmented flowpaths are provided.
Abstract:
A rotary machine comprising at least one row of rotor blades circumferentially distributed on a rotor and disposed in a rotor blade passage between at least one row of upstream stator blades and at least one row of downstream rotor blades is provided with partitions in the upstream and downstream stator blades to provide a plurality of arcuate segmented flowpaths through the rotor blading. A confined flowpath between a machine inlet and a machine outlet intersects the rotor blading at each arcuate segmented flowpath in turn from the upstream side to the downstream side. This invention when applied to a compressor provides a machine in which several stages of compression of a fluid may be achieved using a single row of rotor blades.