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Method and apparatus to diagnose mechanical problems in machinery

A numerical method and machine technology, applied in the field of machinery, can solve problems such as distinguishing

Active Publication Date: 2007-02-07
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In normal operation, some small components may change their frequency signature over time such that using a fixed frequency band it is difficult to distinguish normal changes from those associated with impending failure of the small component

Method used

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  • Method and apparatus to diagnose mechanical problems in machinery
  • Method and apparatus to diagnose mechanical problems in machinery
  • Method and apparatus to diagnose mechanical problems in machinery

Examples

Experimental program
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Embodiment Construction

[0042] Referring now to FIG. 1 , there is shown a diagram of process 100 , which is the water / steam side of a boiler / turbine power cycle. As known to those of ordinary skill in the art, the water / steam side process 100 includes a steam generator 102, a high pressure turbine 104, an intermediate pressure turbine 106, a low pressure turbine 108, a generator 110, a condenser 114, a low pressure feedwater heater 118, a degassing De-aerator feedwater heater 120, high-pressure feedwater heater 122, condensate pump 124, and boiler feed pump 126. Although only low-pressure feedwater heater 116, medium-pressure feedwater heater 118, and high-pressure feedwater heater 122 are shown in FIG. A heater is shown for illustration purposes only. It should also be understood that in some installations, heater 118 is located between heater 122 and boiler feed pump 126 .

[0043] sensor

Types of

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pressure

temperature

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Abstract

A method and apparatus for detecting mechanical problems in machinery used in a process. A model of the process is developed using a modeling technique such as advanced pattern recognition and the model is used to generate predicted values for a predetermined number of the operating parameters of the process and vibration parameters of the machinery. Statistical process control methods are used to determine if the difference between the predicted and actual measured values for one or more of the parameters exceeds a configured statistical limit. A rule set is used to indicate an actual or probable fault in the machinery.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application Serial No. 60 / 536,356, filed January 14, 2004, entitled "A Method To Diagnose The Onset Of Mechanical Problems In Rotating Equipment," in reliance upon the contents of This reference is hereby incorporated in its entirety and hereby claims priority under 35 U.S.C. 119(e). technical field [0003] The present invention relates to machinery, and more particularly to the diagnosis of problems in such equipment. Background technique [0004] High value complex machinery often constitutes a major investment for its owner and is not easily replaced. Examples include consumer items such as automobiles and farm equipment, heavy equipment such as trains, cranes, drills, and heavy-duty bulldozers, and special purpose factory equipment such as generators, assembly line equipment, and drive train equipment such as transmissions for delivering power to Assemb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/00G01H17/00
CPCG01H17/00G05B2219/37435G05B19/4065G05B2219/32201Y02P90/02
Inventor 唐纳德·弗雷里希斯弗兰克·托特史蒂文·约翰逊
Owner ABB (SCHWEIZ) AG
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