Patents by Inventor Ulrich Ehehalt
Ulrich Ehehalt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 10598542Abstract: A method for operating a machine plant having a shaft train, including: a) determining the harmonic frequency of a torsional vibration mode of the shaft train and determining mechanical stresses arising during a vibration period of the torsional vibration mode; b) determining a correlation for each torsional vibration mode between a first stress amplitude, at a position of the shaft train that carries risk of stress damage, and a second stress amplitude, at a measurement location of the shaft train, using stresses determined for the respective torsional vibration mode; c) establishing a maximum first stress amplitude for the position; d) establishing a maximum second stress amplitude, corresponding to the maximum first stress amplitude, for the measurement location; e) measuring the stress of the shaft train while rotating; f) determining a stress amplitude at each harmonic frequency; g) emitting a signal when the stress amplitude reaches the maximum second stress amplitude.Type: GrantFiled: August 27, 2015Date of Patent: March 24, 2020Assignee: Siemens AktiengesellschaftInventors: Ingo Balkowski, Ulrich Ehehalt, Oliver Hensel, Dirk Huckriede, Thomas Küpper, Bernd Lacombe, Ümit Mermertas, Uwe Pfeifer
-
Publication number: 20170254696Abstract: A method for operating a machine plant having a shaft train, including: a) determining the harmonic frequency of a torsional vibration mode of the shaft train and determining mechanical stresses arising during a vibration period of the torsional vibration mode; b) determining a correlation for each torsional vibration mode between a first stress amplitude, at a position of the shaft train that carries risk of stress damage, and a second stress amplitude, at a measurement location of the shaft train, using stresses determined for the respective torsional vibration mode; c) establishing a maximum first stress amplitude for the position; d) establishing a maximum second stress amplitude, corresponding to the maximum first stress amplitude, for the measurement location; e) measuring the stress of the shaft train while rotating; f) determining a stress amplitude at each harmonic frequency; g) emitting a signal when the stress amplitude reaches the maximum second stress amplitude.Type: ApplicationFiled: August 27, 2015Publication date: September 7, 2017Applicant: Siemens AktiengesellschaftInventors: Ingo Balkowski, Ulrich Ehehalt, Oliver Hensel, Dirk Huckriede, Thomas Küpper, Bernd Lacombe, Ümit Mermertas, Uwe Pfeifer
-
Patent number: 8641365Abstract: A rotor of a thermal turbomachine, particularly a gas turbine, is provided. The rotor includes a plurality of individual rotor components that are held together by a tie-bold and combined into a unit. The tie-bolt is supported by the assembly of the surrounding rotor components including the tie-bolt and the rotor disks. A hollow shaft which is made up of two tubular sections and a support wheel further support the rotor.Type: GrantFiled: February 15, 2008Date of Patent: February 4, 2014Assignee: Siemens AktiengesellschaftInventors: Guido Ahaus, Francois Benkler, Ulrich Ehehalt, Harald Hoell, Karsten Kolk, Walter Loch, Harald Nimptsch, Oliver Schneider, Peter-Andreas Schneider, Peter Schröder, Vyacheslav Veitsman
-
Patent number: 8545171Abstract: A rotor of a thermal fluid flow machine, especially a gas turbine, is provided. The rotor includes a plurality of rotor components that are held together by a common tie-bolt that extends through the center of the rotor components. The tie-bolt is fixed in at least one of the rotor components using at least one star spring that surrounds the tie-bolt in a circumferential direction.Type: GrantFiled: February 15, 2008Date of Patent: October 1, 2013Assignee: Siemens AktiengesellschaftInventors: Francois Benkler, Ulrich Ehehalt, Harald Hoell, Uwe Kahlstorf, Karsten Kolk, Walter Loch, Peter-Andreas Schneider
-
Patent number: 8506239Abstract: A gas turbine is provided. The gas turbine includes at least one rotor, having rotor blades arranged on the periphery of rotor disks in a plurality of radial planes, and a tie-bolt extending along slots in the rotor disks and holding the rotor disks together as a unit. At least one annular spacer for fixing the position of the tie-bolt in relation to the center line of the rotor disks is also provided. The spacer includes through-openings that are arranged radially in relation to the tie-bolt or to its center line and that extend coaxially.Type: GrantFiled: February 15, 2008Date of Patent: August 13, 2013Assignee: Siemens AktiengesellschaftInventors: Francois Benkler, Ulrich Ehehalt, Harald Hoell, Walter Loch, Peter-Andreas Schneider
-
Patent number: 8322202Abstract: The invention relates to a method for inspecting especially a gas turbine installation or steam turbine installation. An actual condition of a component of the turbine installation is determined using a suitable system, the determined actual condition is compared with a predetermined desired condition of the component, and the result of comparison between the actual condition and the desired condition is used to determine whether an overall inspection of the turbine installation is required. The component is a guide vane whose angular position in relation to the direction of influx is the actual condition to be determined. The actual condition is determined by an imaging device. The invention also relates to a turbine inspection system for carrying out the method.Type: GrantFiled: January 26, 2007Date of Patent: December 4, 2012Assignee: Siemens AktiengesellschaftInventors: Ulrich Ehehalt, Scarlett Fajardo-Reina, Daniel Grundei, Harald Harders, Stefan Krause, Martin Krompietz, Andreas Lüttenberg, Christoph Pels Leusden, Wilhelm Scheidtmann, Eckart Schumann, Thomas-Dieter Tenrahm, Dirk Trenaman
-
Patent number: 7795776Abstract: An oscillation damping system for stator windings is provided which includes a supporting component of an end winding. The supporting component is equipped with damping elements, which are arranged asymmetrically in the circumferential direction in order to suppress excited natural oscillations. Masses or springs and screw-type restraints which connect the supporting component to the stator housing are suitable as damping elements.Type: GrantFiled: January 5, 2007Date of Patent: September 14, 2010Assignee: Siemens AktiengesellschaftInventors: Ronald Beck, Ulrich Ehehalt, Waldemar Kowalski, Christoph Lehmann, Christoph Richter, Karlheinz Spiess
-
Publication number: 20100166559Abstract: A rotor of a thermal turbomachine, particularly a gas turbine, is provided. The rotor includes a plurality of individual rotor components that are held together by a tie-bold and combined into a unit. The tie-bolt is supported by the assembly of the surrounding rotor components including the tie-bolt and the rotor disks. A hollow shaft which is made up of two tubular sections and a support wheel further support the rotor.Type: ApplicationFiled: February 15, 2008Publication date: July 1, 2010Inventors: Guido Ahaus, Francois Benkler, Ulrich Ehehalt, Harald Hoell, Karsten Kolk, Walter Loch, Harald Nimpstch, Oliver Schneider, Peter-Andreas Schneider, Peter Schröder, Vyacheslav Veitsman
-
Publication number: 20100143149Abstract: A gas turbine is provided. The gas turbine includes at least one rotor, having rotor blades arranged on the periphery of rotor disks in a plurality of radial planes, and a tie-bolt extending along slots in the rotor disks and holding the rotor disks together as a unit. At least one annular spacer for fixing the position of the tie-bolt in relation to the center line of the rotor disks is also provided. The spacer includes through-openings that are arranged radially in relation to the tie-bolt or to its center line and that extend coaxially.Type: ApplicationFiled: February 15, 2008Publication date: June 10, 2010Inventors: Francois Benkler, Ulrich Ehehalt, Harald Hoell, Walter Loch, Peter-Andreas Schneider
-
Publication number: 20100092293Abstract: A rotor of a thermal fluid flow machine, especially a gas turbine, is provided. The rotor includes a plurality of rotor components that are held together by a common tie-bolt that extends through the center of the rotor components. The tie-bolt is fixed in at least one of the rotor components using at least one star spring that surrounds the tie-bolt in a circumferential direction.Type: ApplicationFiled: February 15, 2008Publication date: April 15, 2010Inventors: Francois Benkler, Ulrich Ehehalt, Harald Hoell, Uwe Kahlstorf, Karsten Kolk, Walter Loch, Peter-Andreas Schneider
-
Publication number: 20090302696Abstract: An oscillation damping system for stator windings is provided which includes a supporting component of an end winding. The supporting component is equipped with damping elements, which are arranged asymmetrically in the circumferential direction in order to suppress excited natural oscillations. Masses or springs and screw-type restraints which connect the supporting component to the stator housing are suitable as damping elements.Type: ApplicationFiled: January 5, 2007Publication date: December 10, 2009Inventors: Ronald Beck, Ulrich Ehehalt, Waldemar Kowalski, Christoph Lehmann, Christoph Richter, Karlheinz Spiess
-
Publication number: 20090293596Abstract: The invention relates to a method for inspecting especially a gas turbine installation or steam turbine installation. According to said method, an actual condition of a component of the turbine installation is determined using a suitable system, the determined actual condition is compared with a predetermined desired condition of the component, and the result of comparison between the actual condition and the desired condition is used to determine whether an overall inspection of the turbine installation is required. The component is a guide vane whose angular position in relation to the direction of influx is the actual condition to be determined. The actual condition is determined by means of an imaging device. The invention also relates to a turbine inspection system for carrying out the method.Type: ApplicationFiled: January 26, 2007Publication date: December 3, 2009Inventors: Ulrich Ehehalt, Scarlett Fajardo-Reina, Daniel Grundei, Harald Harders, Stefan Krause, Martin Krompietz, Andreas Lüttenberg, Christoph Pels Leusden, Wilhelm Scheitdtmann, Eckart Schumann, Thomas-Dieter Tenrahm, Dirk Trenaman