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JPS54151075A - Monitoring method for vibration of rotary blade - Google Patents

Monitoring method for vibration of rotary blade

Info

Publication number
JPS54151075A
JPS54151075AJP5935378AJP5935378AJPS54151075AJP S54151075 AJPS54151075 AJP S54151075AJP 5935378 AJP5935378 AJP 5935378AJP 5935378 AJP5935378 AJP 5935378AJP S54151075 AJPS54151075 AJP S54151075A
Authority
JP
Japan
Prior art keywords
vibration
acceleration
frequency
vibration frequency
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP5935378A
Other languages
Japanese (ja)
Inventor
Sunao Umemura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries LtdfiledCriticalMitsubishi Heavy Industries Ltd
Priority to JP5935378ApriorityCriticalpatent/JPS54151075A/en
Publication of JPS54151075ApublicationCriticalpatent/JPS54151075A/en
Pendinglegal-statusCriticalCurrent

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Abstract

PURPOSE: To realize immediate detection of abnormal vibration of blade, by determining the bearing acceleration component of the blade vibration frequency from the output product of the bearing acceleration and sine wave signal synchronized with the rotation frequency of the impeller shaft.
CONSTITUTION: Suppose the vibration frequency of the rotary blade is fo when the rotation frequency of the shaft is fR. Then, since the amplitude of the bearing acceleration vibrating at vibration frequency fo±fR is relatively large, the component of the vibration frequency fo may be detected from this acceleration. That is, the bearing acceleration is picked up 10, and amplified 11 by a charge amplifier, then an output a is obtained. Next, the sine wave signal obtained by inputting the output of rotation pulse into a sine converter 13, and the signal a are inputted into a multiplier 14, and an output product c is obtained. Then, through a filter 15 of passing frequency fo, respective acceleration components c1, b1 of vibration frequency fo are obtained. Processing these components in an arithmetic circuit 16, acceleration component d1 of the vibration frequency fo is obtained. Therefore, by monitoring this output d1, abnormality of the blade vibration may be detected.
COPYRIGHT: (C)1979,JPO&Japio
JP5935378A1978-05-181978-05-18Monitoring method for vibration of rotary bladePendingJPS54151075A (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
JP5935378AJPS54151075A (en)1978-05-181978-05-18Monitoring method for vibration of rotary blade

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP5935378AJPS54151075A (en)1978-05-181978-05-18Monitoring method for vibration of rotary blade

Publications (1)

Publication NumberPublication Date
JPS54151075Atrue JPS54151075A (en)1979-11-27

Family

ID=13110819

Family Applications (1)

Application NumberTitlePriority DateFiling Date
JP5935378APendingJPS54151075A (en)1978-05-181978-05-18Monitoring method for vibration of rotary blade

Country Status (1)

CountryLink
JP (1)JPS54151075A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JP2013512446A (en)*2009-11-302013-04-11スネクマ Method and apparatus for monitoring torsional vibration of a rotating shaft of a turbine engine
CN110462364A (en)*2017-03-282019-11-15三菱重工业株式会社 Blade abnormality detection device, blade abnormality detection system, rotating machinery system, and blade abnormality detection method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JP2013512446A (en)*2009-11-302013-04-11スネクマ Method and apparatus for monitoring torsional vibration of a rotating shaft of a turbine engine
CN110462364A (en)*2017-03-282019-11-15三菱重工业株式会社 Blade abnormality detection device, blade abnormality detection system, rotating machinery system, and blade abnormality detection method
CN110462364B (en)*2017-03-282021-05-28三菱重工业株式会社 Blade abnormality detection device, blade abnormality detection system, rotating mechanical system, and blade abnormality detection method

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