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公开(公告)号：US20210140925A1
公开(公告)日：2021-05-13
申请号：US16611893
申请日：2018-04-12
Applicant: Siemens Aktiengesellschaft
Inventor： Ralf Bell , Uwe Pfeifer , Ingo Balkowski
Abstract: A fast and simple classification of the state of the component is ensured by carrying out the resonance test in an automated manner on blade assemblies, in which frequency images of new and used components are compared with each other.
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公开(公告)号：US10598542B2
公开(公告)日：2020-03-24
申请号：US15505328
申请日：2015-08-27
Applicant: Siemens Aktiengesellschaft
Inventor： Ingo Balkowski , Ulrich Ehehalt , Oliver Hensel , Dirk Huckriede , Thomas Küpper , Bernd Lacombe , Ümit Mermertas , Uwe Pfeifer
IPC: G01H1/14 , G01H1/10 , G01H1/16 , F01D5/02 , F01D17/04 , F01D21/00 , F01D5/26 , F01D5/06 , F01D5/04
Abstract: A method for operating a machine plant having a shaft train, including: a) determining the harmonic frequency of a torsional vibration mode of the shaft train and determining mechanical stresses arising during a vibration period of the torsional vibration mode; b) determining a correlation for each torsional vibration mode between a first stress amplitude, at a position of the shaft train that carries risk of stress damage, and a second stress amplitude, at a measurement location of the shaft train, using stresses determined for the respective torsional vibration mode; c) establishing a maximum first stress amplitude for the position; d) establishing a maximum second stress amplitude, corresponding to the maximum first stress amplitude, for the measurement location; e) measuring the stress of the shaft train while rotating; f) determining a stress amplitude at each harmonic frequency; g) emitting a signal when the stress amplitude reaches the maximum second stress amplitude.
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公开(公告)号：US10088830B2
公开(公告)日：2018-10-02
申请号：US15102568
申请日：2014-10-28
Applicant: SIEMENS AKTIENGESELLSCHAFT
Inventor： Hans-Gerd Brummel , Uwe Pfeifer
IPC: G05B19/406 , G05B19/416 , G01H1/00 , G05B23/02 , G01M7/00
Abstract: A method and apparatus for detecting the current damaged state of a machine is provided. The disclosed relates to an apparatus for detecting the current damaged state of a machine, wherein the data capture and editing device: comprises a Fast Fourier analysis apparatus, for performing a transformation from pressure signals that are available in the time domain to a frequency domain as discrete-time frequency spectra (2), additionally includes a spatial aggregation unit and a temporal aggregation unit that combines the discrete-time frequency spectra, additionally includes a cepstrum analysis unit, for producing a cepstrum with various actual cepstrum values from the temporally and spatially aggregated discrete frequency spectra (5), additionally includes a computation unit that takes the cepstra produced in this manner and produces, at a previously defined interval of time, a plurality of actual cepstrum intervals including adjacent actual cepstrum values, as a result of which an actual cepstrum value, which can be ascertained from at least three adjacent actual cepstrum intervals, can be produced (6), includes a unit that computes (7) a target/actual comparison with the actual cepstrum value produced in this manner and a previously determined target cepstrum value.
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公开(公告)号：US20170254696A1
公开(公告)日：2017-09-07
申请号：US15505328
申请日：2015-08-27
Applicant: Siemens Aktiengesellschaft
Inventor： Ingo Balkowski , Ulrich Ehehalt , Oliver Hensel , Dirk Huckriede , Thomas Küpper , Bernd Lacombe , Ümit Mermertas , Uwe Pfeifer
CPC classification number: G01H1/14 , F01D5/027 , F01D5/04 , F01D5/06 , F01D5/26 , F01D17/04 , F01D21/003 , G01H1/10 , G01H1/16
Abstract: A method for operating a machine plant having a shaft train, including: a) determining the harmonic frequency of a torsional vibration mode of the shaft train and determining mechanical stresses arising during a vibration period of the torsional vibration mode; b) determining a correlation for each torsional vibration mode between a first stress amplitude, at a position of the shaft train that carries risk of stress damage, and a second stress amplitude, at a measurement location of the shaft train, using stresses determined for the respective torsional vibration mode; c) establishing a maximum first stress amplitude for the position; d) establishing a maximum second stress amplitude, corresponding to the maximum first stress amplitude, for the measurement location; e) measuring the stress of the shaft train while rotating; f) determining a stress amplitude at each harmonic frequency; g) emitting a signal when the stress amplitude reaches the maximum second stress amplitude.
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