System and method of determining centrifugal turbomachinery remaining life
First Claim
1. A turbomachine comprising:
- an impeller;
a speed sensor arranged to detect a speed associated with an impeller speed;
a temperature sensor arranged to detect a temperature associated with an impeller exit temperature;
a controls system having impeller parameters including impeller speed and exit temperature, a calculation methodology mathematically manipulating the impeller parameters to determine a remaining life of the impeller, and a programmed response triggered by the controls system in response to the remaining life reaching a threshold.
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Accused Products
Abstract
A centrifugal turbomachine includes an impeller and a speed sensor arranged to detect a speed associated with an impeller speed. A temperature sensor is arranged to detect a temperature associated with an impeller exit temperature. A controls system has impeller parameters, which includes the impeller speed and exit temperature. A calculation methodology is used to mathematically manipulate the impeller parameters to determine a remaining life of the impeller. A program response, such as a warning indication, is triggered by the control system in response to the remaining life reaching a threshold. The controls system monitors the speed and temperature of the impeller. The controls system internally calculates the remaining life based upon the speed and the temperature. In one example, a change in remaining life is calculated in response to a change in speed that results in an impeller stress that exceeds an endurance strength for the impeller.
39 Citations
17 Claims
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1. A turbomachine comprising:
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an impeller;
a speed sensor arranged to detect a speed associated with an impeller speed;
a temperature sensor arranged to detect a temperature associated with an impeller exit temperature;
a controls system having impeller parameters including impeller speed and exit temperature, a calculation methodology mathematically manipulating the impeller parameters to determine a remaining life of the impeller, and a programmed response triggered by the controls system in response to the remaining life reaching a threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of calculating impeller remaining life comprising the steps of:
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a) monitoring a speed of an impeller;
b) monitoring a temperature associated with the impeller;
c) iteratively calculating a remaining life of the impeller based upon the speed and the temperature; and
d) producing a warning indication when the remaining life reaches a threshold. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A controller for an impeller, comprising:
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means for receiving information from a speed sensor arranged to detect a speed of said impeller;
means for receiving information from a temperature sensor arranged to detect a temperature of an exit of said impeller;
means for determining a remaining life of said impeller using said information received from said speed and temperature sensors; and
means for producing a warning when said remaining life reaches a threshold.
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Specification