Patents Assigned to Alstom (Switzerland) Ltd.
  • Patent number: 6640550
    Abstract: A gas turbo set (1, 2, 3) is equipped with at least a cooling air system (20,21). Throttle points (22, 23) are arranged as throttling points in the cooling air flowpath, for the purpose of defining the cooling air mass flow. Said manifolds are bypassed by bypass lines (24). Means (25) are arranged in said bypass lines for adjusting the bypass mass flow. Thus, the cooling air mass flow can be varied without acting on the main cooling air flow as such.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: November 4, 2003
    Assignee: Alstom (Switzerland) Ltd
    Inventors: Juergen Hoffmann, Stefan Rofka, René Waelchli, Rolf Dittmann
  • Patent number: 6638012
    Abstract: The invention relates to an arrangement of guide vane platforms forming the inner contour of the flow channel in an axial-throughflow gas turbine and to a method for reducing the gap losses and for the improved cooling of the wall segments. In order to avoid the disadvantages of the generic solutions, particularly to achieve reduced thermal stress on the stator housing and on the connected vane platforms and subsequently to introduce the cooling air expended for this purpose into the flow channel in such a way that the gap losses of the shrouds of the moving blades are reduced, it is proposed, according to the invention, by dispensing with heat shields, to form the inner contour of the flow channel 13 at least predominantly by means of the guide vane platforms 9 and 10 and to arrange the transitional regions 16 between the platforms 9 and 10 within the cavity 12 formed by the continuous sealing ribs 3 and 4 of the shroud 2.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: October 28, 2003
    Assignee: Alstom (Switzerland) Ltd
    Inventor: Igor Bekrenev
  • Patent number: 6638014
    Abstract: The invention relates to a valve arrangement (1), in particular for a power plant. A housing (2) contains a shut-off valve (3) for shutting off a fluid flow, a control valve (4) for controlling the fluid flow through a housing outlet (8) and a bypass valve (5) for controlling the fluid flow through a bypass (13). This bypass (13) branches off from the housing (2) between the shut-off valve (3) and the control valve (4).
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: October 28, 2003
    Assignee: ALSTOM (Switzerland) Ltd
    Inventors: Ralf Gerdes, Roger Padfield, Franz Suter
  • Patent number: 6637207
    Abstract: The present invention relates to a gas-storage power plant, comprising a gas reservoir (8) in which a gas can be stored under pressure, a turbogroup (2) which has at least one turbine (3, 5), a gas-supply line (9) which leads from the gas reservoir (8) to the turbogroup (2), and a valve arrangement (12) which is arranged in the gas-supply line (9) and throttles a storage pressure (PS) applied on the inlet side to a working pressure (PA) by closed-loop and/or open-loop control. In order to improve the reliability of the valve arrangement (12), it has at least two control valves (13, 14) arranged in series. A leading first control valve (13) throttles the storage pressure (PS) applied on the inlet side to an intermediate pressure (PZ) by closed-loop or open-loop control. A subsequent second control valve (14) throttles the pressure (PZ) applied on the inlet side to the working pressure (PA) by closed-loop control.
    Type: Grant
    Filed: January 28, 2002
    Date of Patent: October 28, 2003
    Assignee: Alstom (Switzerland) Ltd
    Inventors: Stephan Konezciny, Franz Suter
  • Patent number: 6638055
    Abstract: A device for burning a gaseous fuel/oxidant mixture, in particular for a power plant installation, includes a catalyzer/swirl generator arrangement. Part of the fuel/oxidant mixture is burned in the catalyzer/swirl generator arrangement and the catalyzer/swirl generator arrangement generates a swirl flow. The catalyzer/swirl generator arrangement includes several flow channels, of which some are constructed catalytically active and others catalytically inactive. The flow channels can be arranged distributed around a longitudinal central axis of the catalyzer/swirl generator arrangement, and can be slanted relative to the axis.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: October 28, 2003
    Assignee: Alstom (Switzerland) Ltd
    Inventors: Richard Carroni, Adnan Eroglu, Timothy Griffin, Verena Schmidt
  • Patent number: 6637720
    Abstract: The invention relates to a component for holding down measuring leads and measuring devices in a groove (6), provided therefor and having holes (7), of a machine part (5). It is characterized in that the component is designed in the form of a disk (1) which has a cutting edge (3) on its circumference, the cutting edge (3) not being formed continuously over the entire circumference but consisting of two partial cutting edges (3′, 3″) circumferentially opposite one another. In addition, the disk (1) has a central opening (2) in the form of a hexagon socket. For fitting, the disk (1) is put into the hole (7) in such a way that its two partial cutting edges (3′, 3″) point in the longitudinal direction of the groove (6), then a hexagon socket key is inserted into the opening (2) of the disk (1) and the key is turned while the disk (1) is pressed down at the same time, so that the cutting edges (3′, 3″) cut into the material of the machine part (5) and jam tight.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: October 28, 2003
    Assignee: ALSTOM (Switzerland) Ltd
    Inventors: Armin Brehm, Goran Radovik, Hugo Wetter
  • Publication number: 20030197333
    Abstract: A sector plate bypass seal includes a seal bar which engages the outboard end portion of the hot end sector plate and the portion of the housing proximate to the sector plate to close the gap therebetween. At least one bar clip has an upper segment mounted to the hot end center section and a lower segment mounted to the seal bar to hold the seal bar in axial position. At least one seal clamp is mounted to the outboard end portion of the sector plate and slidingly engages the seal bar to hold the seal bar in close engagement with the sector plate and housing portion while allowing vertical relative movement between the seal bar and the sector plate.
    Type: Application
    Filed: April 18, 2002
    Publication date: October 23, 2003
    Applicant: ALSTOM (Switzerland) Ltd
    Inventors: Michael Zakel, Kevin J. O'Boyle
  • Publication number: 20030196304
    Abstract: An access system for installing and removing rotor components of an air preheater includes a lifting beam assembly having a pulley rotatably mounted adjacent to a proximal end portion of the lifting beam. The proximal end portion of the lifting beam and pulley are inserted through an access opening in the preheater housing into the preheater rotor until the proximal end portion of the lifting beam is supported on one of a plurality of radially spaced internal lifting beam supports connected to the rotor post. An external lifting beam support installed externally to the housing supports a distal end portion of the lifting beam. A tugger cable is carried on the pulley and extends along the lifting beam. A proximal end of the tugger cable is mounted to a lifting saddle. A pin inserted through saddle lugs of the lifting saddle and component lugs mounted to the rotor component mounts the lifting saddle to the rotor component.
    Type: Application
    Filed: April 18, 2002
    Publication date: October 23, 2003
    Applicant: ALSTOM (Switzerland) Ltd
    Inventor: Dale A. Gregan
  • Patent number: 6634858
    Abstract: An airfoil includes internal cooling air passages arranged in a serpentine manner with one or more radially outward and radially inward extending passages. The passages are in fluid connection through turns of approximately 180°. The turns near the platform of the airfoil connecting a radially inward extending passage with a radially outward extending passage are realized by a root turn defined by the passage sidewalls, which extend radially inward to the radially inner end of the root section of the airfoil, and by an end plate attached to the radially inner ends of the walls.
    Type: Grant
    Filed: June 11, 2001
    Date of Patent: October 21, 2003
    Assignee: Alstom (Switzerland) Ltd
    Inventors: Norman Roeloffs, Samuel Miller
  • Patent number: 6634859
    Abstract: An apparatus and a process are provided for impingement cooling of a component exposed to heat in a flow machine. The component includes a wall section on at least one side of which at least one impingement air flow impinges, the air flow passing through a flow channel within a surface element arranged spaced apart from the wall section and striking against the wall section to be cooled. The flow channel has an inlet aperture and an outlet aperture, with the outlet aperture directly facing toward the wall section to be cooled, and the inlet aperture has a throughflow cross section which is smaller than the throughflow cross section of the outlet aperture.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: October 21, 2003
    Assignee: Alstom (Switzerland) Ltd
    Inventors: Bernhard Weigand, James P. Downs
  • Patent number: 6634457
    Abstract: An apparatus for damping acoustic vibrations in a combustor as well as a corresponding combustor arrangement with the apparatus. The apparatus includes a Helmholtz resonator (4) that can be connected via a connecting channel (2) with a combustor (1). The Helmholtz resonator (4) contains a hollow body (6) the volume of which can be changed by adding or draining a fluid via a supply line (5), or is located adjacent to such a hollow body in such a way that the resonance volume (3) of the Helmholtz resonator (4) is changed when the volume of the hollow body (6) is changed. This apparatus makes it possible to adjust the resonance frequency of a Helmholtz resonator arranged inside a pressure container in accordance with the respective current operating point of the combustor to be damped, without having to pass movable components through the pressure container.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: October 21, 2003
    Assignee: Alstom (Switzerland) Ltd
    Inventors: Christian Oliver Paschereit, Wolfgang Weisenstein, Peter Flohr, Wolfgang Polifke
  • Patent number: 6629368
    Abstract: A process of brazing cracks and gaps in a single crystal article which takes places isothermally under the following conditions: the temperature of the isothermal solidification is between TLiqidus, Braze+5*(wt-%BBraze) and (Tsolidus, base material−70*(wt-%BBraze)), while (wt-%B*wt-%Cr) is between 15 and 40 and (Tsolv.&ggr;′, base material−TLiqidus, Braze) is above 140° C. This results in an homogeneous &ggr;/&ggr;′-microstructure of the isothermal solidified, brazed joint with mechanical properties similar to those of the base material.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: October 7, 2003
    Assignee: Alstom (Switzerland) Ltd.
    Inventors: Alexander Schnell, John Fernihough, Maxim Konter
  • Patent number: 6626637
    Abstract: In a method for cooling a turbine (1), the supply of the cooling medium is regulated in accordance with the third power of the rotor rotational speed. The method is particularly employed in the period while the rotors run down after the termination of the on-load operation of the turbine (1). The method ensures that cooling takes place according to requirement and a critical phase with respect to vibrations of the long blades can not, as far as possible, be reached.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: September 30, 2003
    Assignee: Alstom (Switzerland) Ltd
    Inventor: Franz Kreitmeier
  • Patent number: 6625988
    Abstract: A premix burner arrangement with catalytic combustion provides a fuel/air mixture to a combustion chamber of a gas turbine arrangement. The premix burner arrangement includes a premix burner, at least one fuel addition unit, and air inlet openings arranged in such a way that at least one of gaseous and liquid fuel can be mixed with combustion inlet air inside the premix burner to form a fuel/air mixture. The fuel/air mixture exits from the premix burner downstream in the direction towards a combustion chamber positioned after the premix burner arrangement and can be ignited inside the combustion chamber. A catalyzer unit is provided before the entrance of the fuel/air mixture into the combustion chamber. Part of the fuel/air mixture can be introduced into and passed through the catalyzer unit before the catalyzed part of the fuel/air mixture flows together with the remaining portion of the fuel/air mixture into the combustion chamber.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: September 30, 2003
    Assignee: Alstom (Switzerland) Ltd
    Inventors: Wolfgang Weisenstein, Timothy Albert Griffin, Peter Jansohn, Thomas Ruck
  • Publication number: 20030178173
    Abstract: A heat transfer element includes a plurality of adjacent heat transfer plates. Each of the heat transfer plates has oppositely disposed first and second heat transfer surfaces and a plurality of laterally spaced notches. A first heat transfer plate of each pair of adjacent heat transfer plates has at least one tall notch and the second heat transfer plate of each pair of plates has at least one short notch, where the notch height of the tall notch is greater than the notch height of the short notch. Each of the tall notches of a heat transfer plate are received in a short notch of an adjacent heat transfer plate to thereby define flow channels therebetween.
    Type: Application
    Filed: March 22, 2002
    Publication date: September 25, 2003
    Applicant: ALSTOM (Switzerland) Ltd.
    Inventors: Scott F. Harting, James P. Walsh
  • Patent number: 6623790
    Abstract: A method for adjusting the size of cooling holes of a gas turbine component is disclosed in which the component is shielded with an easily removable and non- conductive shielding material without shielding the cooling holes themselves. The cooling holes are then coated by a galvanic process and the size of the cooling holes is restored to within manufacturing tolerances. The shielding material is removed and, subsequently, a heat treatment for securing a bonding of the metallic coating is applied.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: September 23, 2003
    Assignee: Alstom (Switzerland) Ltd
    Inventors: John Fernihough, Markus Oehl
  • Patent number: 6623241
    Abstract: A low-pressure turbine is provided with stationary and rotating blades, and the blades have a coating that is hydrophobic or water-repellant and has a smooth surface. The coating preferably contains amorphous carbon. The hydrophobic property of the coating has the result that small droplets contained in the steam phase, upon impacting a coated blade, roll off across the blade in the form of small droplets and further follow the steam path. This prevents moisture losses and increases the efficiency of the turbine. It also prevents the small droplets on the blades from coalescing into larger droplets or into a fluid film. This prevents droplet impingement erosion caused by the impact of large droplets on the blading and other components of the turbine.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: September 23, 2003
    Assignee: Alstom (Switzerland) Ltd
    Inventors: Francisco Leonardo Blangetti, Harald Reiss
  • Patent number: 6615905
    Abstract: A method for constructing a rotor of an air preheater having a plurality of diaphragm plates dividing the rotor into a number of wedge-shaped compartments. Each compartment includes compartment components such as a rotor shell plate, a hot end rotor angle, a cold end rotor angle, and one or more stay plates and means for locating at least a portion of each of the components within the compartment. The diaphragm plates are manufactured by marking at least one index location associated with each compartment component on each diaphragm plate blank utilizing a template identifying the index locations and forming an opening at each index location. Each compartment is assembled by positioning a first diaphragm plate adjacent to a second diaphragm plate and locating each compartment component between the adjacent diaphragm plates by engaging the locating means of the component in an associated opening in one of the diaphragm plates.
    Type: Grant
    Filed: March 7, 2002
    Date of Patent: September 9, 2003
    Assignee: Alstom (Switzerland) Ltd
    Inventors: Robin B. Rhodes, Jon R. Cowburn, Kurt M. Fierle
  • Patent number: 6615588
    Abstract: The present invention relates to an arrangement for the cooling of a component, in particular of the combustion chamber of a turbo machine, wherein at least one cooling duct (5) is provided between a wall (1) to be cooled and a plate-shaped element (2) spaced apart from the wall. The plate-shaped element (2) has a number of through openings (4) for a cooling medium and is arranged such that the distance to the wall (1) increases in the flow direction of the cooling medium through the cooling channel (5). The arrangement is characterised in that the size of the through openings (4) in the plate-shaped element (2) increases with increasing distance between the plate-shaped element (2) and the wall (1). In this way a homogeneous cooling over the length of the cooling channel is achieved with simple measures.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: September 9, 2003
    Assignee: Alstom (Switzerland) Ltd
    Inventor: Rainer Hoecker
  • Patent number: 6616406
    Abstract: An airfoil in a gas turbine comprises an improved cooling construction at its trailing edge providing impingement as well as enhanced film cooling. The airfoil comprises cavities arranged between the suction and pressure side wall for a cooling fluid and exit passages leading from the cavities to exit ports positioned on the pressure side wall. According to the invention the suction side wall is shaped such that the tip portion of the trailing edge has a cross-section comprising a part of a circle that is equal or greater than a semi-circle extending from the suction side around the tip to the pressure side and beyond into the exit passage. The exit passages comprise a bend in the region of the tip where they form an exit plenum for the cooling fluid to diffuse further.
    Type: Grant
    Filed: June 11, 2001
    Date of Patent: September 9, 2003
    Assignee: ALSTOM (Switzerland) Ltd
    Inventor: George Liang