GB711185A - Apparatus for investigating torsional oscillations or cyclic speed variations in rotary members - Google Patents

Apparatus for investigating torsional oscillations or cyclic speed variations in rotary members

Info

Publication number
GB711185A
GB711185A GB768052A GB768052A GB711185A GB 711185 A GB711185 A GB 711185A GB 768052 A GB768052 A GB 768052A GB 768052 A GB768052 A GB 768052A GB 711185 A GB711185 A GB 711185A
Authority
GB
United Kingdom
Prior art keywords
shaft
pick
output
frequency
amplitude
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.)
Expired
Application number
GB768052A
Inventor
Michael Edward Clarke
Leslie Harold Burton Knox
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.)
Napier Turbochargers Ltd
Original Assignee
D Napier and Son 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 D Napier and Son Ltd filed Critical D Napier and Son Ltd
Priority to GB768052A priority Critical patent/GB711185A/en
Publication of GB711185A publication Critical patent/GB711185A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
    • G01H1/10—Measuring characteristics of vibrations in solids by using direct conduction to the detector of torsional vibrations

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Testing Of Balance (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

711,185. Torsiographs. NAPIER & SON, Ltd., D. March 17, 1953 [March 25, 1952], No. 7680/52. Class 40 (1). Torsional oscillations in a rotating shaft A' are measured by attaching thereto a phonic wheel A, the pick-up B of which produces a carrier current frequency modulated by the cyclic variations in shaft speed. This output is fed through a constant output amplifier D, a frequency discriminating network E, integrator F, and amplifier G to a cathode ray tube indicator H. The integrator is provided to compensate for errors introduced by the discriminator so that the indication is correct for both amplitude and frequency. The C.R.T. timebase is triggered by impulses produced once per cycle of operations which may be one or more revolutions, by the passage of a single rotating pole on or geared to the shaft past a pick-up C. Amplitude modulation of the carrier frequency is avoided by having the pick-up B designed to give an output independent of rotor speed, and by having 3 series connected pickups B spaced roughly 120 degrees apart around the rotating member and arranged to give in phase 'outputs so that. radial vibration of the shaft produces no change of amplitude in the resultant output.
GB768052A 1952-03-25 1952-03-25 Apparatus for investigating torsional oscillations or cyclic speed variations in rotary members Expired GB711185A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB768052A GB711185A (en) 1952-03-25 1952-03-25 Apparatus for investigating torsional oscillations or cyclic speed variations in rotary members

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB768052A GB711185A (en) 1952-03-25 1952-03-25 Apparatus for investigating torsional oscillations or cyclic speed variations in rotary members

Publications (1)

Publication Number Publication Date
GB711185A true GB711185A (en) 1954-06-23

Family

ID=9837729

Family Applications (1)

Application Number Title Priority Date Filing Date
GB768052A Expired GB711185A (en) 1952-03-25 1952-03-25 Apparatus for investigating torsional oscillations or cyclic speed variations in rotary members

Country Status (1)

Country Link
GB (1) GB711185A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3058339A (en) * 1958-09-02 1962-10-16 Curtiss Wright Corp Vibration detector and measuring instrument
CN101907486A (en) * 2009-06-06 2010-12-08 诺沃皮尼奥内有限公司 The monitoring of the transverse vibration of rotor dynamic system, angular oscillation and twisting vibration

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3058339A (en) * 1958-09-02 1962-10-16 Curtiss Wright Corp Vibration detector and measuring instrument
CN101907486A (en) * 2009-06-06 2010-12-08 诺沃皮尼奥内有限公司 The monitoring of the transverse vibration of rotor dynamic system, angular oscillation and twisting vibration
US9404791B2 (en) 2009-06-06 2016-08-02 Nuovo Pignone S.P.A. Lateral, angular and torsional vibration monitoring of rotordynamic systems

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