JPS54151075A - Monitoring method for vibration of rotary blade - Google Patents
Monitoring method for vibration of rotary bladeInfo
- Publication number
- JPS54151075A JPS54151075A JP5935378A JP5935378A JPS54151075A JP S54151075 A JPS54151075 A JP S54151075A JP 5935378 A JP5935378 A JP 5935378A JP 5935378 A JP5935378 A JP 5935378A JP S54151075 A JPS54151075 A JP 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
Links
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
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
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5935378A JPS54151075A (en) | 1978-05-18 | 1978-05-18 | Monitoring method for vibration of rotary blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5935378A JPS54151075A (en) | 1978-05-18 | 1978-05-18 | Monitoring method for vibration of rotary blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54151075A true JPS54151075A (en) | 1979-11-27 |
Family
ID=13110819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5935378A Pending JPS54151075A (en) | 1978-05-18 | 1978-05-18 | Monitoring method for vibration of rotary blade |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54151075A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013512446A (en) * | 2009-11-30 | 2013-04-11 | スネクマ | Method and apparatus for monitoring torsional vibration of a rotating shaft of a turbine engine |
| CN110462364A (en) * | 2017-03-28 | 2019-11-15 | 三菱重工业株式会社 | Abnormal Leaves detection device, Abnormal Leaves detection system, rotatory mechanical system and Abnormal Leaves detection method |
-
1978
- 1978-05-18 JP JP5935378A patent/JPS54151075A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013512446A (en) * | 2009-11-30 | 2013-04-11 | スネクマ | Method and apparatus for monitoring torsional vibration of a rotating shaft of a turbine engine |
| CN110462364A (en) * | 2017-03-28 | 2019-11-15 | 三菱重工业株式会社 | Abnormal Leaves detection device, Abnormal Leaves detection system, rotatory mechanical system and Abnormal Leaves detection method |
| CN110462364B (en) * | 2017-03-28 | 2021-05-28 | 三菱重工业株式会社 | Blade abnormality detection device, blade abnormality detection system, rotary machine system, and blade abnormality detection method |
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