GB1033705A - Improvements relating to hydraulic vibrators - Google Patents

Improvements relating to hydraulic vibrators

Info

Publication number
GB1033705A
GB1033705A GB4326562A GB4326562A GB1033705A GB 1033705 A GB1033705 A GB 1033705A GB 4326562 A GB4326562 A GB 4326562A GB 4326562 A GB4326562 A GB 4326562A GB 1033705 A GB1033705 A GB 1033705A
Authority
GB
United Kingdom
Prior art keywords
cylinder
valve
sensing means
actuator
required frequency
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
GB4326562A
Inventor
Richard Northam Knights
Robert Sydney Martin
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.)
Dowty Rotol Ltd
Original Assignee
Dowty Rotol 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 Dowty Rotol Ltd filed Critical Dowty Rotol Ltd
Priority to GB4326562A priority Critical patent/GB1033705A/en
Publication of GB1033705A publication Critical patent/GB1033705A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/18—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid
    • B06B1/183—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid operating with reciprocating masses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2838—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT with out using position sensors, e.g. by volume flow measurement or pump speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

1,033,705. Hydraulic reciprocating motors. DOWTY ROTOL Ltd. Nov. 15, 1963 [Nov. 15, 1962], No. 43265/62. Heading F1A. [Also in Division G3R] In a vibrator device wherein an electric signal generator 51 supplies an a.c. current signal of required frequency to an electro-magnetically actuated valve 12 controlling the flow of liquid to an hydraulic actuator 1,4 whereby the movable cylinder 4 thereof vibrates at that frequency, an electrical feed-back circuit is provided including sensing means 36 responsive to a function of position or load of the movable cylinder 4 and a high pass filter 62 arranged to pass that part of the signal derived from the sensing means 36 which has frequencies higher than the required frequency to the valve 12 or a further valve 13 also operable to control the flow of liquid to the actuator to thus reduce the amplitude of actuator vibrations having frequencies higher than the required frequency. The sensing means 36 may be in the form of a linear inductive transducer comprising a coil 37 having a central conductor 43 and ends 41, 42 connected to an oscillator 57 so that a feed back voltage is produced in a lead 61 which is dependent on the displacement of the cylinder 4 from its central position. The voltage in the lead 61 is fed to the main amplifier 44 to restore the cylinder 4 to a central vibrating position and is also applied to the high pass filter which allows only the higher frequencies to be amplified and supplied to an exciter 35 of the valve 13. The feed back voltage may be provided by a strain gauge on a test piece secured to the cylinder 4 or by a load measuring device disposed therebetween.
GB4326562A 1962-11-15 1962-11-15 Improvements relating to hydraulic vibrators Expired GB1033705A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4326562A GB1033705A (en) 1962-11-15 1962-11-15 Improvements relating to hydraulic vibrators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4326562A GB1033705A (en) 1962-11-15 1962-11-15 Improvements relating to hydraulic vibrators

Publications (1)

Publication Number Publication Date
GB1033705A true GB1033705A (en) 1966-06-22

Family

ID=10427999

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4326562A Expired GB1033705A (en) 1962-11-15 1962-11-15 Improvements relating to hydraulic vibrators

Country Status (1)

Country Link
GB (1) GB1033705A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795286A (en) * 1972-02-23 1974-03-05 Texaco Inc Apparatus and means for inducing vibrations in an earth formation
US3854118A (en) * 1971-11-10 1974-12-10 Pelton Co Servo hydraulic vibrator with phase error correction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3854118A (en) * 1971-11-10 1974-12-10 Pelton Co Servo hydraulic vibrator with phase error correction
US3795286A (en) * 1972-02-23 1974-03-05 Texaco Inc Apparatus and means for inducing vibrations in an earth formation

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