Tuning thermal mismatch between turbine rotor parts with a thermal medium

Title: Tuning thermal mismatch between turbine rotor parts with a thermal medium

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Abstract

In a turbine rotor, an aft shaft wheel and the final-stage wheel of the rotor are coupled together, including by a rabbeted joint. During shutdown and startup of the turbine, a thermal mismatch between the aft shaft wheel and final-stage wheel is avoided by respectively heating and cooling the aft shaft wheel to maintain the thermal mismatch within acceptable limits, thereby avoiding opening of the rabbeted joint and the potential for unbalancing the rotor and rotor vibration. The thermal medium may be supplied by piping in the aft bearing cavity into the cavity between the forward closure plate and the aft shaft wheel.

Inventors:

Schmidt, Mark Christopher ^[1]

Niskayuna, NY

Issue Date:: 2001-01-01

Research Org.:: General Electric Co., Schenectady, NY (United States)

OSTI Identifier:: 873560

Patent Number(s):: 6190127

Assignee:: General Electric Co. (Schenectady, NY)

Patent Classifications (CPCs):: F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES

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F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
F01D5/082 - {on the side of the rotor disc}
F01D5/088 - {in a closed cavity}

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DOE Contract Number:: FC21-95MC31176

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: tuning; thermal; mismatch; turbine; rotor; medium; shaft; wheel; final-stage; coupled; including; rabbeted; joint; shutdown; startup; avoided; respectively; heating; cooling; maintain; acceptable; limits; avoiding; potential; unbalancing; vibration; supplied; piping; bearing; cavity; forward; closure; plate; thermal medium; turbine rotor; thermal mismatch; /416/415/

Citation Formats


                    Schmidt, Mark Christopher. Tuning thermal mismatch between turbine rotor parts with a thermal medium.  United States: N. p., 2001. 
        Web.

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                    Schmidt, Mark Christopher. Tuning thermal mismatch between turbine rotor parts with a thermal medium.  United States.

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                    Schmidt, Mark Christopher. Mon .  
        "Tuning thermal mismatch between turbine rotor parts with a thermal medium".  United States.  https://www.osti.gov/servlets/purl/873560.

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@article{osti_873560,

  title        = {Tuning thermal mismatch between turbine rotor parts with a thermal medium},

  author       = {Schmidt, Mark Christopher},

  abstractNote = {In a turbine rotor, an aft shaft wheel and the final-stage wheel of the rotor are coupled together, including by a rabbeted joint. During shutdown and startup of the turbine, a thermal mismatch between the aft shaft wheel and final-stage wheel is avoided by respectively heating and cooling the aft shaft wheel to maintain the thermal mismatch within acceptable limits, thereby avoiding opening of the rabbeted joint and the potential for unbalancing the rotor and rotor vibration. The thermal medium may be supplied by piping in the aft bearing cavity into the cavity between the forward closure plate and the aft shaft wheel.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2001},

  month        = {1}

}

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