Patents by Inventor Heinrich Stuer
Heinrich Stuer 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).
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Patent number: 11365637Abstract: A method for profiling blades of an axial turbomachine includes preparing a geometric model of a blade profile; determining an oscillation mode of the geometric model; calculating a time profile of a position-dependent disruptive pressure in a channel between two adjacent blade profiles over an oscillation period of the oscillation belonging to the oscillation mode, changing the geometric model and determining a different oscillation mode for the modified geometric model; and determining the damping of the oscillation using the disruptive pressure profile calculated previously and accepting the modified geometric model for the case that the damping of the oscillation turns out to be greater than calculated, otherwise repeating the last two steps with another modified geometric model.Type: GrantFiled: April 12, 2017Date of Patent: June 21, 2022Assignee: Siemens Energy Global GmbH & Co. KGInventors: Christian Peeren, Stefan Schmitt, Heinrich Stüer
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Patent number: 11319815Abstract: A bladed rotor system includes first and second sets of blades with respective airfoils each having at least one internal cavity. The airfoils of both the first and second sets of blades have identical outer shapes defined by an outer surface of an outer wall of the respective airfoils. The airfoils of the first set of blades are distinguished from the airfoils of the second set of blades by a geometry and/or position of at the least one internal cavity, which is unique to blades of a given set. The natural frequency of a blade of the first set differs from the natural frequency of a blade of the second set by a predetermined amount. The blades of the first set and the second set are alternately arranged in a periodic fashion in said circumferential row, to provide a frequency mistuning to stabilize flutter of the blades.Type: GrantFiled: April 13, 2018Date of Patent: May 3, 2022Assignee: Siemens Energy Global GmbH & Co. KGInventors: Daniel M. Eshak, Susanne Kamenzky, Daniel Vöhringer, Stefan Schmitt, Heinrich Stüer, Yuekun Zhou, Samuel R. Miller, Jr.
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Publication number: 20210010375Abstract: A bladed rotor system includes first and second sets of blades with respective airfoils each having at least one internal cavity. The airfoils of both the first and second sets of blades have identical outer shapes defined by an outer surface of an outer wall of the respective airfoils. The airfoils of the first set of blades are distinguished from the airfoils of the second set of blades by a geometry and/or position of at the least one internal cavity, which is unique to blades of a given set. The natural frequency of a blade of the first set differs from the natural frequency of a blade of the second set by a predetermined amount. The blades of the first set and the second set are alternately arranged in a periodic fashion in said circumferential row, to provide a frequency mistuning to stabilize flutter of the blades.Type: ApplicationFiled: April 13, 2018Publication date: January 14, 2021Inventors: Daniel M. Eshak, Susanne Kamenzky, Daniel Vöhringer, Stefan Schmitt, Heinrich Stüer, Yuekun Zhou, Samuel R. Miller, Jr.
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Patent number: 10563511Abstract: A method for profiling a turbine rotor blade for an axial flow machine, having the following steps: providing a geometric model of a blade profile, having a camber line of a profile section of the turbine rotor blade; determining boundary conditions for a flow flowing around the turbine rotor blade; changing the camber line such that the flow which is adjusted by the boundary conditions produces the maximum of the difference of the isentropic mach number between the pressure side and the suction side of the turbine rotor blade in a blade section which extends from the blade trailing edge in the direction towards the blade leading edge and the length of which is 65% of the length S of the blade chord.Type: GrantFiled: April 18, 2016Date of Patent: February 18, 2020Assignee: Siemens AktiengesellschaftInventors: Christian Peeren, Stefan Schmitt, Ulrich Waltke, Heinrich Stüer
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Publication number: 20190203601Abstract: A method for profiling blades of an axial turbomachine includes preparing a geometric model of a blade profile; determining an oscillation mode of the geometric model; calculating a time profile of a position-dependent disruptive pressure in a channel between two adjacent blade profiles over an oscillation period of the oscillation belonging to the oscillation mode, changing the geometric model and determining a different oscillation mode for the modified geometric model; and determining the damping of the oscillation using the disruptive pressure profile calculated previously and accepting the modified geometric model for the case that the damping of the oscillation turns out to be greater than calculated, otherwise repeating the last two steps with another modified geometric model.Type: ApplicationFiled: April 12, 2017Publication date: July 4, 2019Applicant: Siemens AktiengesellschaftInventors: Christian Peeren, Stefan Schmitt, Heinrich Stüer
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Patent number: 9951648Abstract: A method for designing a stage for an axial turbomachine having a guide blade ring and a rotor blade ring arranged downstream of the guide blade ring is provided. The method includes: profiling a guide blade ring having guide blades arranged regularly over the circumference of the guide blade ring in accordance with basic aerodynamic and mechanical conditions; moving at least one profile section of at least one of the guide blades in the circumferential direction in such a way that the pitch angle for the at least one guide blade and a guide blade arranged adjacent thereto varies over the blade height in such a way that during operation of the axial turbomachine the departing flow formed downstream of the guide blade ring is irregularly formed over the circumference of the axial turbomachine, such that the vibration excitation of the rotor blades of the rotor blade ring is low.Type: GrantFiled: April 5, 2013Date of Patent: April 24, 2018Assignee: Siemens AktiengesellschaftInventors: Christoph Hermann Richter, Heinrich Stuer
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Publication number: 20180100399Abstract: A method for profiling a turbine rotor blade for an axial flow machine, having the following steps: providing a geometric model of a blade profile, having a camber line of a profile section of the turbine rotor blade; determining boundary conditions for a flow flowing around the turbine rotor blade; changing the camber line such that the flow which is adjusted by the boundary conditions produces the maximum of the difference of the isentropic mach number between the pressure side and the suction side of the turbine rotor blade in a blade section which extends from the blade trailing edge in the direction towards the blade leading edge and the length of which is 65% of the length S of the blade chord.Type: ApplicationFiled: April 18, 2016Publication date: April 12, 2018Applicant: Siemens AktiengesellschaftInventors: Christian Peeren, Stefan Schmitt, Ulrich Waltke, Heinrich Stüer
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Patent number: 9416684Abstract: A structure and method are provided for preventing or at least minimizing thermally-induced structural distortions, such as may occur when a steam turbine is cooling down. The steam turbine may include an inner housing and an outer housing. An intermediate space is formed between the inner housing and the outer housing, and sealing steam may be injected into the intermediate space to avoid the formation of temperature strata in the interspace and thus prevent the outer housing from bowing.Type: GrantFiled: August 3, 2012Date of Patent: August 16, 2016Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Frank Deister, Ingo Forster, Daniel Gloss, Christian Musch, Heinrich Stuer, Frank Truckenmuller
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Publication number: 20160201500Abstract: A steam turbine arrangement and a method for operating a steam turbine, wherein the steam turbine is supplied with steam via a first valve in a first steam supply line and via a second valve in a second steam supply line. The valves are controlled asymmetrically so that in the event of unwanted vibrations measured by acceleration sensors one valve closes and the other valve opens in order to ensure the desired total mass flow.Type: ApplicationFiled: August 5, 2014Publication date: July 14, 2016Applicant: Siemens AktiengesellschaftInventors: Simon Hecker, Christian Musch, Heinrich Stüer
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Publication number: 20160169053Abstract: A turbine condenser includes an area with condenser tubes for liquefying waste steam from the steam turbine, a chamber formed by condenser walls for receiving the waste steam, and a diverted steam channelling system for channelling diverted steam into the chamber in the turbine condenser, wherein the diverted steam channelling system includes an annular nozzle extending into the turbine condenser, the outlet end of which has an uneven edge.Type: ApplicationFiled: July 17, 2014Publication date: June 16, 2016Applicant: SIEMENS AKTIENGESELLSCHAFTInventors: Frank Deister, Ingo Förster, Simon Hecker, Christian Musch, Heinrich Stüer
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Publication number: 20150063985Abstract: A method for designing a stage for an axial turbomachine having a guide blade ring and a rotor blade ring arranged downstream of the guide blade ring is provided. The method includes: profiling a guide blade ring having guide blades arranged regularly over the circumference of the guide blade ring in accordance with basic aerodynamic and mechanical conditions; moving at least one profile section of at least one of the guide blades in the circumferential direction in such a way that the pitch angle for the at least one guide blade and a guide blade arranged adjacent thereto varies over the blade height in such a way that during operation of the axial turbomachine the departing flow formed downstream of the guide blade ring is irregularly formed over the circumference of the axial turbomachine, such that the vibration excitation of the rotor blades of the rotor blade ring is low.Type: ApplicationFiled: April 5, 2013Publication date: March 5, 2015Applicant: Siemens AktiengesellschaftInventors: Christoph Hermann Richter, Heinrich Stuer
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Patent number: 8956122Abstract: A safety device for a turbine blade is provided. The safety device includes a shear pin, a clamping piece and a securing element, wherein the shear pin is arranged in a corresponding bore in the turbine blade foot and the clamping piece is designed having an upper limb and a lower limb, wherein the clamping piece exerts a radial force on the turbine blade foot for radial safeguarding.Type: GrantFiled: September 17, 2010Date of Patent: February 17, 2015Assignee: Siemens AktiengesellschaftInventors: Thomas Helmis, Heinrich Stüer
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Publication number: 20140366538Abstract: A structure and method are provided for preventing or at least minimizing thermally-induced structural distortions, such as may occur when a steam turbine is cooling down. The steam turbine may include an inner housing and an outer housing. An intermediate space is formed between the inner housing and the outer housing, and sealing steam may be injected into the intermediate space to avoid the formation of temperature strata in the interspace and thus prevent the outer housing from bowing.Type: ApplicationFiled: August 3, 2012Publication date: December 18, 2014Applicant: SIEMENS AKTIENGESELLSCHAFTInventors: Frank Deister, Ingo Forster, Daniel Gloss, Christian Musch, Heinrich Stuer, Frank Truckenmuller
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Patent number: 8641019Abstract: A diversion station is provided. The diversion station makes it possible to particularly effectively cool diverted water vapor by mixing it with water. The diversion station includes a mixing device, which comprises a so-called static mixer that is substantially made of a wire mesh. The wire mesh is produced by at least one wire that is substantially interlaced into loops. In the intended installation situation, the mixer is installed upstream of a water injection with regard to a flow direction specified by the water vapor such that the mixture of water and water vapor flows through the loops.Type: GrantFiled: January 8, 2010Date of Patent: February 4, 2014Assignee: Siemens AktiengesellschaftInventors: Arne Grassmann, Christian Musch, Heinrich Stüer
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Publication number: 20120177499Abstract: A safety device for a turbine blade is provided. The safety device includes a shear pin, a clamping piece and a securing element, wherein the shear pin is arranged in a corresponding bore in the turbine blade foot and the clamping piece is designed having an upper limb and a lower limb, wherein the clamping piece exerts a radial force on the turbine blade foot for radial safeguarding.Type: ApplicationFiled: September 17, 2010Publication date: July 12, 2012Inventors: Thomas Helmis, Heinrich Stüer
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Publication number: 20110291307Abstract: A diversion station is provided. The diversion station makes it possible to particularly effectively cool diverted water vapor by mixing it with water. The diversion station includes a mixing device, which comprises a so-called static mixer that is substantially made of a wire mesh. The wire mesh is produced by at least one wire that is substantially interlaced into loops. In the intended installation situation, the mixer is installed upstream of a water injection with regard to a flow direction specified by the water vapor such that the mixture of water and water vapor flows through the loops.Type: ApplicationFiled: January 8, 2010Publication date: December 1, 2011Inventors: Arne Grassmann, Christian Musch, Heinrich Stüer
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Patent number: 7794202Abstract: A turbine blade is provided, comprising a stator-side end located toward a stationary stator cylinder of the turbine, a rotor-side end located toward an axial rotor of the turbine, a leading edge located between the stator-side end and the rotor-side end, a trailing edge located between the stator-side end and the rotor-side end and located down-stream of the leading edge with respect to a fluid flow direction, wherein the rotor-side and stator-side ends have a negative sweep angle as measured between the instantaneous tangent of the blade surface and the fluid flow direction.Type: GrantFiled: June 18, 2004Date of Patent: September 14, 2010Assignee: Siemens AktiengesellschaftInventors: Donald Borthwick, Shun Chen, Heinrich Stüer, Frank Truckenmüller
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Publication number: 20070071606Abstract: A turbine blade is provided, comprising a stator-side end located toward a stationary stator cylinder of the turbine, a rotor-side end located toward an axial rotor of the turbine, a leading edge located between the stator-side end and the rotor-side end, a trailing edge located between the stator-side end and the rotor-side end and located down-stream of the leading edge with respect to a fluid flow direction, wherein the rotor-side and stator-side ends have a negative sweep angle as measured between the instantaneous tangent of the blade surface and the fluid flow direction.Type: ApplicationFiled: June 18, 2004Publication date: March 29, 2007Inventors: Donald Borthwick, Shun Chen, Heinrich Stuer, Frank Truckenmuller
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Publication number: 20040191068Abstract: The invention relates to a moving-blade row of a fluid-flow machine, the moving-blade row having individual adjacent moving blades which each have a moving-blade root and a moving-blade center region and also a moving-blade tip and a leading edge and a trailing edge, the moving blades being mechanically connected to one another in the moving-blade center region by supporting elements in such a way that undesirable vibrations of the moving blades are effectively avoided.Type: ApplicationFiled: March 10, 2004Publication date: September 30, 2004Inventors: Christoph Richter, Heinrich Stuer, Frank Truckenmuller
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Patent number: 4601879Abstract: A copper-nickel-tin-titanium-alloy suitable for use as a base material for semiconductors includes, by weight, 0.25 to 3.0% nickel, 0.25 to 3.0% tin, and 0.12 to 1.5% titanium, the remainder being copper and common impurities. An alternative form of the inventive alloy includes, by weight, 0.25 to 3.0% nickel, 0.25 to 3.0% tin, 0.12 to 1.5% titanium, and 0.05 to 0.45% chrome, the remainder being copper and common impurities. A method for making these alloys includes the steps of homogenizing the alloy at temperatures of 850.degree. to 950.degree. C. between 1 and 24 hours, hot-rolling the alloy at temperatures of 600.degree. to 800.degree. C. in one or more passes, and cooling the alloy to room temperature with a cooling speed of between 10.degree. C. per minute and 2000.degree. C. per minute.Type: GrantFiled: May 24, 1985Date of Patent: July 22, 1986Assignee: Wieland-Werke AGInventors: Wolfgang Durrschnabel, Heinrich Stuer, Jorg Steeb, Franz J. Puckert