초록 ▼

A method and a system for determining radial clearances in a rotating machine are provided. The rotating machine includes at least one shell, at least one rotor, and at least one stationary component. The method includes creating a finite element model for at least one component within the rotating

A method and a system for determining radial clearances in a rotating machine are provided. The rotating machine includes at least one shell, at least one rotor, and at least one stationary component. The method includes creating a finite element model for at least one component within the rotating machine, creating a cycle deck data file for the rotating machine, determining an initial clearance versus time, and determining an initial clearance versus location. The system includes a client system including a browser, a centralized database for storing machine information, and a server system configured to be coupled to the client system and the database wherein the server system is further configured to receive machine information from the client system, store finite element model information in the centralized database, track machine information, update the centralized database periodically with newly received machine information to maintain machine information, and provide machine information in response to an inquiry.

대표청구항 ▼

1. A method of determining radial clearances in a rotating machine including at least one shell, at least one rotor, and at least one stationary component, said method comprising:creating a three-dimensional finite element model for at least one of a shell, a packing structure, a diaphragm, and a ro

1. A method of determining radial clearances in a rotating machine including at least one shell, at least one rotor, and at least one stationary component, said method comprising:creating a three-dimensional finite element model for at least one of a shell, a packing structure, a diaphragm, and a rotor within the rotating machine; creating a cycle deck data file for the rotating machine; determining an initial clearance versus time; and determining an initial clearance versus location. 2. A method in accordance with claim 1 wherein creating a finite element model comprises creating a two-dimensional axi-symetric finite element model of at least one rotor.3. A method in accordance with claim 1 wherein creating a finite element model further comprises creating a formatted spreadsheet input file including calculated values for a component deflection versus a time for each component modeled, and a component deflection versus a location for each component modeled.4. A method in accordance with claim 1 wherein said method further comprises creating a data file for at least one of a machine system layout, one-dimensional computation, cold clearance, rotor vibration, and bearing lift.5. A method in accordance with claim 4 wherein creating a data file for a machine system layout comprises determining axial positioning and coordinates.6. A method in accordance with claim 4 wherein creating a data file for a one-dimensional computation comprises determining design lengths for at least one of rotor blades, packing teeth, and tip spill.7. A method in accordance with claim 4 wherein creating a data file for a one-dimensional computation further comprises determining a set of material properties for at least one of rotor blades, packing teeth, and tip spill.8. A method in accordance with claim 4 wherein creating a data file for a cold clearances comprises determining an initial clearance for machine components versus a location for each clearance determined.9. A method in accordance with claim 4 wherein creating a data file for a rotor vibration comprises determining at least one of a rotor resonance condition, a rotor vibration velocity amplitude at a plurality of predetermined rotational speeds, a rotor vibration displacement amplitude at a plurality of predetermined rotational speeds, and a rotor deflection versus location at a steady state operating condition of the machine.10. A method in accordance with claim 4 wherein creating a data file for a bearing lift comprises determining a rotor deflection versus a location due to bearing lift at steady state operating condition of the machine.11. A method in accordance with claim 1 wherein determining a transient clearance versus time and an transient clearance versus location comprises determining a deformed stator coordinate solution versus time and determining a deformed stator coordinate solution versus location.12. A method in accordance with claim 1 wherein determining a transient clearance versus time and an transient clearance versus location comprises determining a deformed rotor coordinate solution versus time and determining a deformed rotor coordinate solution versus location.13. A method in accordance with claim 1 wherein determining a transient clearance versus time comprises determining a difference between an initial clearance versus time and a sum of a stator deformed clearance versus time and a rotor deformed clearance versus time.14. A method in accordance with claim 1 wherein determining a transient clearance versus location comprises determining a difference between an initial clearance versus location and a sum of a stator deformed clearance versus location and a rotor deformed clearance versus location.15. A computer program embodied on a computer readable medium for determining a rotating machine radial clearance, said program comprising a code segment that:prompts a user to input at least one of a machine identifier, a user identifier, a current date and time, and a comment; retrieves stored data for the machine identified; prompts a user to input data from a selection of data exclusive to the machine identified; provides a user with an input file status for the machine identified; and provides a graphical output of calculations based on data input by the user and data retrieved from storage. 16. A computer program in accordance with claim 15 further comprising a code segment that:generates at least one of a radial plot of calculated deflection at a predetermined time for a predetermined location, and a plot of deflection versus time for a predetermined location; and displays each said plot as requested by the user. 17. A network based system for determining a rotating machine radial clearance, said system comprising:a client system comprising a browser; a centralized database for storing machine information; and a server system configured to be coupled to said client system and said database, said server system further configured to: receive machine information from said client system; store finite element model information in said centralized database; track machine information; update said centralized database periodically with newly received machine information to maintain machine information; and provide machine information in response to an inquiry. 18. A system in accordance with claim 17 wherein said server system is further configured to:determine a rotating machine radial clearance; and generate at least one of a radial plot of calculated deflection at a predetermined time for a predetermined location, and a plot of deflection versus time for a predetermined location.