GB399845A - Improvements in and relating to the balancing of rotating members - Google Patents

Improvements in and relating to the balancing of rotating members

Info

Publication number
GB399845A
GB399845A GB1068/32A GB106832A GB399845A GB 399845 A GB399845 A GB 399845A GB 1068/32 A GB1068/32 A GB 1068/32A GB 106832 A GB106832 A GB 106832A GB 399845 A GB399845 A GB 399845A
Authority
GB
United Kingdom
Prior art keywords
voltmeter
way
condenser
transformer
plates
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
GB1068/32A
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB1068/32A priority Critical patent/GB399845A/en
Priority to US657915A priority patent/US2012780A/en
Publication of GB399845A publication Critical patent/GB399845A/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/32Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/32Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels
    • F16F15/322Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels the rotating body being a shaft
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00Testing static or dynamic balance of machines or structures
    • G01M1/14Determining imbalance
    • G01M1/16Determining imbalance by oscillating or rotating the body to be tested
    • G01M1/22Determining imbalance by oscillating or rotating the body to be tested and converting vibrations due to imbalance into electric variables
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00Testing static or dynamic balance of machines or structures
    • G01M1/30Compensating imbalance
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S29/00Metal working
    • Y10S29/901Balancing method

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Testing Of Balance (AREA)

Abstract

399,845. Phase-difference measurements. TAYLOR, M. K. and FERRANTI, Ltd., Hollinwood, Lancashire. Jan. 13, 1932, No. 1068. [Class 37.] Electrical methods are used to measure the characteristics of the vibrations due to out-ofbalance forces in apparatus for testing the balance of rotors. The flyer 1, Fig. 1, is mounted on air bearings 2, 2 in resilient supports 3, 3. Helices 4, 4 of say solder are applied one at each end of the flyer. Each bearing is connected by rods 5, 5 to electric generators 6, 6 of such type that the voltage rises when the displacement of the..bearings increases and these voltages are measured in a voltmeter V. A high resistance potentiometer p may be inserted in the circuit to safeguard the voltmeter. An air turbine 7 drives the flyer, and a tool similar to a lathe tool is used to remove some of the lower spiral 4. If the speed exceeds the critical the solder in being removed from the right place and the increase of speed is rapid and may be heard in the head phones H. Cutting is continued until the voltmeter reads zero when only a hum is heard in the head phones. The switch s is now moved over and the top spiral 4 treated similarly. In a second form, shown in Fig. 2, for balancing small motors, the armature shaft 11 of the motor 10 is fitted at each end with a spiral 12 either on the shaft or as shown on added metal discs 13, 13. A condenser plate 14 capable of being slowly rotated by hand is placed near a key way 15. The table 17 is mounted on two springs 18, 18 having insulated metal plates 19, 19 mounted on a rigid insulated base 20. Vibrations transmitted to the table vary the capacity of the two condensers formed, by the table and insulated plates. These condensers are connected one at a time with a switch s to a thermionic amplifier formed by a circuit including valves 21, 22. The condensers charged by a battery 23 cause varying potentials to be developed across the resistances 24, 25 which are fed to the grids of the valves. Both outputs are now passed through transformers 26, 27 the secondary of the latter being connected in series with the control grid of a tetrode, pentrode or other suitable valve by way of a grid leak and condenser 28 and to the cathode of the valve by way of the screen biassing battery 29. The secondary of transformer 26 is connected in series with the screen grid and by way of battery 29 to the cathode. A suitable voltmeter 30 is placed across the secondary of the transformer 26. In the anode circuit is a milliammeter 31 which indicates any out of balance with respect to the position of condenser plate 14, the voltmeter 30 indicating the degree. In action, as the locating condenser 14 is slowly rotated, an angle is formed at which a maximum anode current flows giving the angle of out-of-balance and indicates the radial displacement on the disc at which it is necessary to remove solder. The tool is applied at this radius. The other end is now treated in the same manner until the. voltmeter reads zero. The first end is now treated again. It may be quicker to use a trial and error method by cutting and bringing the voltage from each end successively down to zero. Electromagnetic devices may be used instead of electrostatic using magnetic generators such as moving iron or moving coil loudspeaker movements or carbon or other microphones. For the phase locator a small condenser used as described is best or a locating cam may be put in the shaft operating a suitable generator to give the required reference point, or a rotating carbon contact may be used. In addition to the above methods of indicating phase relationship, an oscillographic system may be employed, preferably a cathode ray tube in which are four of the time base (on one pair of plates or coils) is synchronized with the rotation frequency by means of the neondiode time base described in the " Proceedings of the Physical Society," Vol. 43, pages 502- 511, 1931, and the oscillations from the vibration and impulse detectors are mixed and applied to the other pair of plates or coils so that the position of the impulse with respect to the vibration may be quickly viewed on the oscillograph screen. In a modification, the vibration potentials are transmitted by way of a transformer to the screen grid of a pentode valve while the kill potentials are transmitted by way of a second transformer to the control grid of the same valve. The output is measured by a milliammeter. Specification 18260/04, [Class 110, Rotary engines &c.], is referred to.
GB1068/32A 1932-01-13 1932-01-13 Improvements in and relating to the balancing of rotating members Expired GB399845A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1068/32A GB399845A (en) 1932-01-13 1932-01-13 Improvements in and relating to the balancing of rotating members
US657915A US2012780A (en) 1932-01-13 1933-02-21 Balancing of rotating members

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1068/32A GB399845A (en) 1932-01-13 1932-01-13 Improvements in and relating to the balancing of rotating members

Publications (1)

Publication Number Publication Date
GB399845A true GB399845A (en) 1933-10-13

Family

ID=9715614

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1068/32A Expired GB399845A (en) 1932-01-13 1932-01-13 Improvements in and relating to the balancing of rotating members

Country Status (2)

Country Link
US (1) US2012780A (en)
GB (1) GB399845A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426305A (en) * 1942-03-12 1947-08-26 Gen Motors Corp Balancing machine
US2449563A (en) * 1943-05-04 1948-09-21 Gyro Balance Corp Balancing machine
US2534268A (en) * 1946-05-31 1950-12-19 Kahn Washing machine cylinder balancing apparatus
US2665581A (en) * 1944-01-13 1954-01-12 Clare H Kean Dynamic displacement meter
US3102429A (en) * 1963-09-03 Network
CN107956840A (en) * 2017-12-26 2018-04-24 中国工程物理研究院总体工程研究所 Electromagnetic type automatic balance head

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2534267A (en) * 1945-10-03 1950-12-19 Leo M Kahn Washing machine cylinder balancing apparatus
US2478663A (en) * 1946-03-29 1949-08-09 Albert V Masket Projectile testing machine
DE2900663C2 (en) * 1979-01-10 1982-12-16 FAG Kugelfischer Georg Schäfer & Co, 8720 Schweinfurt Process for the manufacture and testing of rolling elements
US5025662A (en) * 1983-06-10 1991-06-25 Hultberg Richard M Automotive wheel balancing apparatus and method
CN106813011B (en) * 2017-03-24 2018-10-23 中国人民解放军理工大学 Modularization pipeline vibration control apparatus
CN110886811A (en) * 2019-12-03 2020-03-17 青岛良研信息科技有限公司 Portable water quality detector for cultivation

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3102429A (en) * 1963-09-03 Network
US2426305A (en) * 1942-03-12 1947-08-26 Gen Motors Corp Balancing machine
US2449563A (en) * 1943-05-04 1948-09-21 Gyro Balance Corp Balancing machine
US2665581A (en) * 1944-01-13 1954-01-12 Clare H Kean Dynamic displacement meter
US2534268A (en) * 1946-05-31 1950-12-19 Kahn Washing machine cylinder balancing apparatus
CN107956840A (en) * 2017-12-26 2018-04-24 中国工程物理研究院总体工程研究所 Electromagnetic type automatic balance head

Also Published As

Publication number Publication date
US2012780A (en) 1935-08-27

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