JPS54116986A - Fatigue monitor of rotating shaft - Google Patents

Fatigue monitor of rotating shaft

Info

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
Application number
JP2433478A
Other languages
Japanese (ja)
Inventor
Michio Kumazawa
Mitsuo Takeshita
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 Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2433478A priority Critical patent/JPS54116986A/en
Publication of JPS54116986A publication Critical patent/JPS54116986A/en
Pending legal-status Critical Current

Links

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
JP2433478A 1978-03-02 1978-03-02 Fatigue monitor of rotating shaft Pending JPS54116986A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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