US3348376A - Generator of high frequency oscillations - Google Patents

Generator of high frequency oscillations Download PDF

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Publication number
US3348376A
US3348376A US498784A US49878465A US3348376A US 3348376 A US3348376 A US 3348376A US 498784 A US498784 A US 498784A US 49878465 A US49878465 A US 49878465A US 3348376 A US3348376 A US 3348376A
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United States
Prior art keywords
fluid
generator
rotors
motor
wheel
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Expired - Lifetime
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US498784A
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English (en)
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Eissfeldt Werner
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Individual
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Individual
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K7/00—Sirens
    • G10K7/005—Ultrasonic sirens
    • 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
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
    • 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
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating

Definitions

  • ABSTRACT OF THE DISCLOSURE A high-frequency oscillation generator having a pump rotor with a pumping face transverse to the axis of rotation thereof and driven by a source of motive power, and a motor rotor axially aligned with the pump rotor and having a face confronting same, one of the shafts of the hydraulic clutch formed thereby being axially oscillated upon relative rotation of the rotors, the rotors having confronting chambers for inducing centrifugal flow of hydraulic fluid between the chambers of the confronting rotors in the manner of a fluid coupling.
  • the object of the invention is the construction of an oscillation generator for high-frequency oscillation in the ultrasonic range which does not require a complicated electrical apparatus, but nevertheless emits sufiicient oscillation energy, and which finally requires little space and can be economically manufactured.
  • the solution of the problem underlying the invention consists in utilizing the hydraulic force of known hydraulic clutches, especially those of the Fottinger system, for the generation of high-frequency pulses.
  • the construction of the oscillation generator corresponds essentially to known hydraulic clutches, both a pump and also a motor or turbine wheel or rotor being used. The difference lies in the fact that the fins of the pump and the motor wheel are aligned in the same direction and that the motor wheel is braked to prevention of rotation.
  • the hydraulic forces acting on the motor Wheel generate oscillations, especially longitudinal oscillations, mainly in the direction of the motorshaft axis.
  • the drawing shows the invention in two embodiments.
  • FIG. 1 is an elevational view, partially in axial section along the line I-I of FIG. 2 of an oscillation generator according to this invention.
  • FIG. 2 is a plan view of the oscillation generator with its pump wheel removed, the view being taken along the line IIII of FIG. 1.
  • FIG. 3 is a partial vertical section through another embodiment of the apparatus, in which the motor shaft has been braked.
  • FIG. 4 is a partial elevation and a partial axial section through another exemplary embodiment of oscillation generator possessing several sets of Wheels.
  • FIG. 5 is an elevational view of the generator-support and assembly.
  • the oscillation generator consists of a pump Wheel 2, which is rotated by a vertical drive shaft 1.
  • a pump Wheel 2 On the lower face 17 of the pump wheel, part of a casing 3 is connected by means of screws 18, the motor wheel 6 being keyed onto a section 19 of the motor shaft 9 of smaller diameter and being located in the interior of the casing. With a section of still smaller diameter 20, the motor shaft 9 juts into a bore 12 of the pump wheel 2.
  • the motor shaft 9 passes through a bore 21 in the casing 3 .and is supported in a bore 23 of a base 10, where it is secured against rotation by means of a key 22.
  • the device functions as follows: If the drive shaft is driven, for instance, .at 3,000 rpm, then the longitudinal oscillation of the motor shaft has a frequency of 20,000 c.p.s.
  • Centrifugal force Mass radius square of the angular velocity From this formula, one sees that the flow pressure increases with the mass of the fluid used, the size of the pump disc and drive r.p.m. or angular velocity of the pump wheel. Depending on the intended purpose, the output frequency variation can be effected by altering the above factors.
  • the channels 4, 5 of the pump wheel are only for a short time exactly opposite to the channels 7, 8 of the motor wheel. Due to the centrifugal force acting on the fluid situated in the channels of the pump wheel, these fluid particles will flow in the direction of the arrow 31 and will exert a flow pressure on the fluid located in the channels 7, 8 of the motor wheel 6, so that these fluid particles will flow in the direction of the arrow. 32.
  • the channels 4, and 7, 8 Due to the velocity difference between the pump wheel and the motor Wheel, the channels 4, and 7, 8 after being opposite to each other for a short time, will more or less be momentarily disconnected from each other until they are opposite each other the next time, so that the flow velocity in these channels is progressively braked to nearly zero, thereafter increasing again progressively.
  • the braking has a sinusoidal axial effect on the motor wheel 6 and thus leads to a longitudinal oscillation in the motor shaft 9.
  • the distance between the pump wheel and the motor wheel must be changed, which can be effected by means of an adjust-' ing device, with which the motor shaft 9, and with it the motor wheel 6, can be adjusted with respect to the pump wheel.
  • This power regulation of the apparatus can also be effected automatically during operation by exerting via the motor shaft 9 an upwardly directed pressure on the motor wheel 6 when placing the apparatus on the workpiece to be treated, so that, starting from zero, the power rises gradually, corresponding to the nearness of the motor wheel 6 to the pump Wheel 2.
  • the system of supply and drain channels for the fluid serves the purpose of removing the heat created and for insuring that the fluid fills the braking channels.
  • the pump wheel 2 conveys the fluid from the distributing space 12 via the lines 26 and 27 into the braking channels 4, S, the fluid being automatically sucked in through the supply channel 11. Since the motor wheel 6 only has a low speed or is prevented from any rotation, the fluid can drain via the channels 28, 29 into the drain channel 13 due to the lack of centrifugal force.
  • the fluid leaving the channel'13 is piped through a sufficiently large container or a long pipe system back to the supply channel 11, the fluid path being dimensioned to provide sufficient time to dissipate the heat.
  • the motor shaft 33 is supported rotatably within the base 34.
  • a regnlatable brake 35 is provided below the base 34.
  • a shoulder 36 below the base 34, which acts as a stop against the lower surface 37 of the base 34 and thus guarantees that the necessary minimum play is retained between the surfaces of the motor wheel and the pump wheel facing each other, and that grinding of the pump wheel on the motor wheel is prevented.
  • this embodiment can have the :advantage that one can regulate both the power and the :frequency of the longitudinal oscillations of the motor :shaft, since the degree of braking alters the rotational :speed of the motor shaft from zero to any desired value,
  • these lines are provided in the base 34 displaced in height with respect to each other. They each lead to an annular channel 44, 45 in the motor shaft 33 and are connected via the connection channels 46, 47 with the further supply channels and drain channels 48, 49 respectively.
  • the embodiment of the FIG. 4 is an oscillation generator with several sets of pump and motor wheels.
  • the drive shaft 50 rotates a cylindrical pump casing 51, in which there are mounted rigidly a number of pump wheels 52, 53, 54 that are axially spaced. Between these wheels, the motor wheels 55, 56, 57 can be inserted, which are mounted by keys 59, 60, 61 respectively on a motor shaft. For the easy mounting of these motor wheels on the motor shaft, the latter decreases in diameter from Wheel to wheel.
  • the extreme end of the motor shaft 58 is designed as section 62 and is supported in a bore 63 of the first pump wheel 52 as with the first exemplary embodiment.
  • the pump casing 51 is sealed towards the bottom by the cover 64, through the bore 65 of which the motor shaft 58 passes, which is connected by a wedge 66 with the base 67. Also with this line channels not shown in the drawing are provided, which serve to transfer fluid into and out of the apparatus and for cooling.
  • the generator 68 of FIGS. 1 and 2, 3 or 4 is shown to be held against the workpiece 69, for treatment by ultrasonic vibration, in a press whose frame 71 carries the workpiece holder 70.
  • a high-frequency oscillation generator comprising a pair of axially aligned rotors having confronting faces transverse to their axes and formed with confronting an gularly spaced fluid compartments adapted to induce a centrifugal flow of fluid between the compartments of said rotors upon relative rotation thereof, at least one of said rotors being axially oscillatable for transferring vibrations to a body, input means for driving a pumping one of said rotors for inducing a hydraulic-fluid flow between said compartments, and means for restricting the rotation of the other, driven rotor relative to the pump rotor.
  • each of said rotors is formed with a multiplicity of torque-converter fins defining the respective compartments between them, the fins of the pump and driven rotors being aligned in the same direction, said generator further comprising a first vertical shaft drivingly connected with the pump rotor, a second vertical shaft axially aligned with the first vertical shaft and drivingly connected with the driven rotor, and a casing connected to said pump rotor and surrounding said driven rotor while rotating relatively to said second shaft.
  • a generator defined in claim 2 further comprising a base keyed to said second shaft and provided with inlet and outlet ducts for delivering hydraulic fluid to and removing it from said compartments.
  • each of the faces of said rotors are provided with a multiplicity of concentric circular rows of angularly equispaced compartments with the chambers of the adjacent rows of each face being angularly offset by half the spacing between the compartments.
  • a generator defined in claim 2 wherein at least one of said shafts is provided with a plurality of fluid channels for delivering hydraulic fluid to and removing it from said compartments.
  • a generator defined in claim 2 further comprising means for adjusting the axial spacing of the faces of said rotors to vary the energy of the axial oscillations generated by the rotors.
  • a generator defined in claim 2 wherein a plurality of axially spaced pump rotors and driven rotors are interleaved axially and rotatably entrained by said casing and said second shaft while bearing against shoulders of said casing and said second shaft in axial direction.
  • a generator defined in claim 2 wherein the means for restricting rotation of the driven rotor includes a brake for said second shaft.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Hydraulic Motors (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
US498784A 1965-06-10 1965-10-20 Generator of high frequency oscillations Expired - Lifetime US3348376A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN26854A DE1291925B (de) 1965-06-10 1965-06-10 Vorrichtung zur Erzeugung von Ultraschallschwingungen

Publications (1)

Publication Number Publication Date
US3348376A true US3348376A (en) 1967-10-24

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ID=7343991

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Application Number Title Priority Date Filing Date
US498784A Expired - Lifetime US3348376A (en) 1965-06-10 1965-10-20 Generator of high frequency oscillations

Country Status (3)

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US (1) US3348376A (de)
DE (1) DE1291925B (de)
GB (1) GB1125503A (de)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT175072B (de) * 1950-08-10 1953-06-10 Kurt Dipl Ing Nekolny Vorrichtung zur Erzeugung hochfrequenter mechanischer Schwingungen in Flüssigkeiten
DE1094112B (de) * 1957-05-10 1960-12-01 Daimler Benz Ag Hydrodynamische Kupplung, insbesondere fuer Kraftfahrzeuge

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
GB1125503A (en) 1968-08-28
DE1291925B (de) 1969-04-03

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