JPS54116986A - Fatigue monitor of rotating shaft - Google Patents
Fatigue monitor of rotating shaftInfo
- Publication number
- JPS54116986A JPS54116986A JP2433478A JP2433478A JPS54116986A JP S54116986 A JPS54116986 A JP S54116986A JP 2433478 A JP2433478 A JP 2433478A JP 2433478 A JP2433478 A JP 2433478A JP S54116986 A JPS54116986 A JP S54116986A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- frequency
- torsional
- fatigue
- spring constant
- 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
- 238000005336 cracking Methods 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
PURPOSE: To monitor the fatigue of a shaft thereby to prevent the shaft from being broken by monitoring the variation in the torsional intrinsic frequency of the shaft system in terms of reduction of the torsional spring constant of the shaft due to the fatigue and cracking in the shaft.
CONSTITUTION: A pulse generator 10 generates pulses of such frequency as is proportional to the r.p.m. of the shaft 4, and a rotational irregularity meter 11 meters the fluctuations in the pulse frequencies to detect the torsional vibrations of the shaft 4. When there arise disturbances in torque such as abrupt short-circuiting, the waveforms of the meter 11 are analyzed by means of a frequency analyzer 12. Then, as shown in solid lines, a peak is found at the torsional intrisic frequency f1 of the shaft system. Here, the intrinsic frequency is deduced in advance. When the shaft 4 is subjected to fatique or cracking due to a sudden accident, the cross- sectional area of the shaft is reduced so that the torsional spring constant is accordingly decreased to shift the intrinsic frequency f1 downward to f2. Thus, it is judged by a discriminator 14 whether the frequency f1 is shifted to f2 or not. If this shift takes place, the result is displayed in a device 15, and an alrm is generated.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2433478A JPS54116986A (en) | 1978-03-02 | 1978-03-02 | Fatigue monitor of rotating shaft |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2433478A JPS54116986A (en) | 1978-03-02 | 1978-03-02 | Fatigue monitor of rotating shaft |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54116986A true JPS54116986A (en) | 1979-09-11 |
Family
ID=12135274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2433478A Pending JPS54116986A (en) | 1978-03-02 | 1978-03-02 | Fatigue monitor of rotating shaft |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54116986A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10232518A1 (en) * | 2002-07-18 | 2003-10-02 | Daimler Chrysler Ag | Drive shaft vibration analysis device comprises a piezo-element that is attached to a drive shaft so that a sound signal can be coupled to it with the resultant echo captured and analyzed to detect any shaft damage |
WO2012061979A1 (en) | 2010-11-09 | 2012-05-18 | Abb Research Ltd. | Cable fatigue monitor and method thereof |
CN116428128A (en) * | 2023-04-18 | 2023-07-14 | 上海戈洛立科技有限公司 | Wind driven generator spindle fracture monitoring and early warning method and device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52143083A (en) * | 1976-05-24 | 1977-11-29 | Hitachi Ltd | Control of torsional vibration in rotary axis system and control device |
-
1978
- 1978-03-02 JP JP2433478A patent/JPS54116986A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52143083A (en) * | 1976-05-24 | 1977-11-29 | Hitachi Ltd | Control of torsional vibration in rotary axis system and control device |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10232518A1 (en) * | 2002-07-18 | 2003-10-02 | Daimler Chrysler Ag | Drive shaft vibration analysis device comprises a piezo-element that is attached to a drive shaft so that a sound signal can be coupled to it with the resultant echo captured and analyzed to detect any shaft damage |
WO2012061979A1 (en) | 2010-11-09 | 2012-05-18 | Abb Research Ltd. | Cable fatigue monitor and method thereof |
CN116428128A (en) * | 2023-04-18 | 2023-07-14 | 上海戈洛立科技有限公司 | Wind driven generator spindle fracture monitoring and early warning method and device |
CN116428128B (en) * | 2023-04-18 | 2023-09-26 | 上海戈洛立科技有限公司 | Wind driven generator spindle fracture monitoring and early warning method and device |
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