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 membersInfo
- 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
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.
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)
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 |
-
1952
- 1952-03-25 GB GB768052A patent/GB711185A/en not_active Expired
Cited By (3)
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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