Alstom Technology Limited

General Electric Technology Gmbh

Martin Reigl

Maurus Herzog

Thomas Mokulys

Franz Suter

Richard Brendon Scarlin

Davor Kriz

Luca Marie Ripamonti

Giorgio Zanazzi

Jian Chen

Jozo Drmic

Rabiye Bekyigit

Andreas Ehrsam

Thomas Schreier

Philipp Brunner

Vishal Borikar

Michael Hiegemann

Johann Sigurd Kubel

Rolf Doebler

Hans-Ludwig Boxheimer

Helen Elisabeth Parker

Frank Maeckle

Soeren Lange

The present application provides a method of evaluating valve creep damage in a turbine by a data acquisition system. The method may include the steps of receiving a number of operating parameters from a number of sensors including steam temperatures and steam pressures about the valve over time, generating a design material model for the valve, determining an indicator for consumed creep lifetime based on the steam temperature and steam pressures about the valve over time as compared to the design material model, and altering one or more of the operating parameters and/or initiating repair procedures based upon the consumed creep lifetime indicator.

Creep damage indicator module for a valve and actuator monitoring system

A method of determining a remaining life in a component and a rotatable machine system are provided. The rotatable machine system includes a plurality of valves coupled in flow communication with a rotatable machine of the rotatable machine system, a plurality of sensors configured to receive operating parameters associated with the rotatable machine and the plurality of valves, and an online valve lifetime counter (OVLIC), including a processor communicatively coupled to the plurality of sensors. The OVLIC is configured to determine a trend of differential temperature across a body of a valve of the plurality of valves, convert the trend of differential temperature to a stress induced into the valve over time, and determine life remaining in the valve based on a total damage of the valve wherein the total damage is a function of creep damage and fatigue damage to the valve.

Method and system for a component lifetime counter

The present application provides a method of evaluating valve spindle vibration in a turbine by a data acquisition system. The method may include the steps of receiving a number of operating parameters from a number of sensors, wherein the operating parameters may include valve spindle vibration, comparing the valve spindle vibration to a predetermined value, and altering one or more of the operating parameters if the valve spindle vibration exceeds the predetermined value.

Spindle vibration evaluation module for a valve and actuator monitoring system

The present application provides a method of evaluating fatigue damage in a turbine by a data acquisition system. The method may include the steps of receiving a number of operating parameters from a number of sensors and based upon the operating parameters, determining: a run time from start-up until the turbine reaches X percent load and a start-up temperature transient from start-up until the turbine reaches X percent load, and calculating: a run time ratio of the determined run time until the turbine reaches X percent load to a predetermined run time, a start-up temperature ratio of the determined start-up temperature transient to a predetermined start-up temperature transient, and a fatigue severity factor by averaging the run time ratio and the start-up temperature ratio. Based upon the determined fatigue severity factor, altering one or more of the operating parameters and/or initiating repair procedures.

Advanced startup counter module for a valve and actuator monitoring system

The present application provides a method of evaluating fatigue damage in an actuator spring of a valve used in a turbine by a data acquisition system. The method may include the steps of receiving a number of operating parameters from a number of sensors including valve spindle position over time, determining cyclic loading on the actuator spring based upon the valve spindle position over time, generating an intended design lifetime for the actuator spring, determining a fatigue damage indicator based on the cyclic loading as compared to the intended design lifetime, and altering one or more of the operating parameters and/or initiating repair procedures based upon the fatigue damage indicator.

Actuator spring lifetime supervision module for a valve and actuator monitoring system

The present application provides a method of evaluating valve tightness in a turbine by a data acquisition system. The method may include the steps of receiving a number of operating parameters from a number of sensors, opening a first valve and closing a second valve, closing the first valve, determining a pressure decay time between the first valve and the second valve, determining a stable value of pressure between the first valve and the second valve, comparing the pressure decay time and the stable value of pressure to predetermined values, and altering one or more of the operating parameters and/or initiating repair procedures if the pressure decay time and/or the stable value of pressure is increasing and/or exceeds the predetermined values.

Advanced tightness test evaluation module for a valve and actuator monitoring system

The present application provides a method of evaluating insulation quality in a turbine by a data acquisition system. The method may include the steps of receiving a number of operating parameters from a number of sensors, wherein the operating parameters may include casing temperatures and insulation temperatures, comparing the casing temperatures and the insulation temperatures to predetermined casing and insulation values, and altering one or more of the operating parameters and/or initiating repair procedures if the casing temperatures fall below the casing predetermined values and/or the insulation temperatures exceed the insulation predetermined values.

Insulation quality indicator module for a valve and actuator monitoring system

The present application provides a method of evaluating valve conditions in a turbine by a data acquisition system. The method may include the steps of receiving a number of operating parameters from a number of sensors, wherein the operating parameters may include steam temperatures determined over time and steam pressure, determining a steam chemistry, a throttling history, and a piping material, determining a probability of valve erosion based upon the steam temperatures determined over time, the steam chemistry, the throttling history, and the piping material, and altering one or more of the operating parameters and/or initiating repair procedures based upon the determined probability.

Solid particle erosion indicator module for a valve and actuator monitoring system

A high temperature actuated steam valve is disclosed that has a connector extending between the casing of the valve and its actuator. The connector can include two spacers made of materials each with a different hot strength wherein the first spacer, fixed adjacent the casing, has a higher hot strength that the second spacer, which is fixed adjacent to the actuator.

High temperature steam valve

A steam turbine is provided having a relief groove which is arranged in the region of the equalizing piston and extends in the circumferential direction of the rotor. The relief groove, with regard to an inlet passage, is arranged in the axial upstream direction so that it is arranged on the rotor outside a region in which the steam flow enters the bladed flow path via the inlet passage. The relief groove, with regard to the first blade row, is arranged in a region in which the greatest thermal stresses can arise in the rotor. As an option, the relief groove has a cover for reducing vortex flows, and also devices for reducing heating of the groove or devices for active cooling. The steam turbine allows an increased number of risk-free running up and running down operations of the steam turbine with minimum detriment to the turbine performance.

Steam turbine with relief groove on the rotor

A steam valve is provided including a chest, a lock, a spindle, and a strainer. Each of these components is made of specific Ni alloys combinations that enable the valve to operate at temperatures above 650&#xb0; C. with a good service life.

A steam turbine (), especially for the high-pressure range or intermediate-pressure range, includes a rotor () which is rotatably mounted around an axis and concentrically enclosed at a distance by an inner casing (), wherein between the rotor () and the inner casing () a flow passage () is formed, which on the inlet side is axially delimited by a balance piston () which is arranged on the rotor (), and into which flow passage rotor blades () and stator blades (), alternating in the direction of flow, radially project, and wherein, at the entry of the flow passage (), an inlet scroll (), through which steam is guided from the outside radially inwards and deflected in a deflection region () in the axial direction to the inlet of the flow passage (), is formed on the inner casing (). A reduction of the thermal loads and stresses is achieved by a stress-relief slot () in the deflection region () upstream of the first rotor blade row () for reducing stresses in the fastening slot () of the first rotor blade row () in the rotor (), and by a heat shield () arranged in the region of the stress-relief slot () for protecting the rotor () against high temperatures.

Steam turbine

A rotor for a rotating machine, in particular a steam turbine includes at least one subregion composed of a metal structure having a reduced density and including a multiplicity of finely distributed cavities.

Rotor for a rotating machine, in particular a steam turbine

A steam turbine () having an inner casing (), in which a rotor () that can rotate about an axis () is arranged, a steam passage () being formed between the rotor () and the inner casing (), in which steam passage there is a multi-stage arrangement of guide vanes () secured to the inner casing () and rotor blades () secured to the rotor (), in which arrangement hot steam coming from an inlet () undergoes work-performing expansion. In a steam turbine of this type, the thermal loading of the rotor and/or inner casing, in particular when starting up, is reduced by virtue of the fact that at least in the steam passage () plate-like protective shields (), which protect the surface of the rotor () or inner casing () beneath them from the direct action of the hot steam flowing through the steam passage (), are arranged parallel and close to the surface of the rotor () and/or parallel and close to the inner surface of the inner casing ().

A rotor for a steam turbine for working steam and including at least two rotor parts welded to one another using a circumferential, annular weld zone, which is closed in the circumferential direction. A cooling channel system is formed in the rotor and has at least one inlet flow channel, at least one outlet flow channel and at least one cooling channel. In order to simplify the integration of the cooling channel system in the rotor, the weld zone surrounds a cavity which forms a component of the cooling channel system and through which cooling steam flows.

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Ehrendingen, Switzerland

Martin Reigl