Two mass swing system with independently controlled vibratory exciter means

• US 3,924,730 A
• Filed: 09/21/1966
• Issued: 12/09/1975
• Est. Priority Date: 09/21/1966
• Status: Expired due to Term

• Current Assignee: William R. Brown
• Original Assignee: William R. Brown
• Inventors: Brown, William R.
• Primary Examiner(s): Blunk, E. C.
• Assistant Examiner(s): Nase, J. V.
• Application Number:
  US04/581,058
• Time in Patent Office: 3,366 Days
• Field of Search: 198/220
• US Class Current: 198/761
• CPC Class Codes: B06B 3/00 Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
• CPC Class Codes: H02K 33/02 with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs

Abstract

A tuned two mass swing system including a base reaction mass and a frame feeder mass supported thereon by elastic coupling means permitting independent horizontal and vertical natural frequencies and independent horizontal and vertical components of vibration effective to swing the feeder frame in a controlled excursionary vibratory path for feeding material. An independent horizontal vibratory exciter means and an independent vertical vibratory exciter means is required to supply the independent horizontal and vertical components of vibration. Through a control means connected to independently and variably control the exciter means enables one to adjust the magnitude of each of the horizontal and vertical components of vibration and also to independently and variably adjust the operating phase relationship between the horizontal and vertical components of vibration for the purpose of regulating the action of the material moved. This is true of a straight feeder as well as a bowl feeder. One set of flat leaf springs disposed in the horizontal plane and with their adjacent ends connected to another set of flat leaf springs disposed vertically may be employed as the elastic coupling to provide the independent horizontal and vertical natural frequencies and the independent motion resulting in the vertical and horizontal components respectively. This may also be obtained through the use of resilient material fastened on the one side to the reaction base and on the other side to the feeder frame. A single or a multiple number of elastic members may be employed to support the feeder frame when independent horizontal and vertical components are applied thereto. Thus the structure of the elastic support together with the control enables one to independently regulate the action of the material moved by the feeder means.

Claims

1. A tuned two mass swing system including a base serving as a reaction mass and a feeder frame serving as a feeder mass supported from the base by elastic coupling means permitting independent horizontal and vertical components of vibration to be effective to swing said feeder frame in a controlled excursionary vibratory path of displacement for feeding materials, independent horizontal vibratory exciter means and independent vertical vibratory exciter means to independently supply said horizontal and vertical components of vibration to said feeder frame, characterized by control means connected to independently and variably control said exciter means to independently change the magnitude of each of said horizontal and said vertical components of vibration and to independently and variably adjust the operating phase relationship between said horizontal and vertical components of vibration of said vibratory exciter Means to regulate the action of the material moved on said feeder frame.

2. The tuned two mass swing system of claim 1 characterized in that said elastic coupling means consists of symmetrically balanced horizontally and vertically disposed sets of parallel leaf springs having the adjacent ends of each set rigidly interconnected and the other end of each set connected respectively to said feeder frame and to said base.

3. The tuned two mass swing system of claim 2 characterized in that said horizontally disposed leaf springs are connected at their opposite ends to the central portion of said feeder frame to provide a linear vibration along a vertical path and the vertically disposed leaf springs are connected at their opposite end to the outer portions of said base to provide a torsional vibration about a vertical central axis.

4. The tuned two mass swing system of claim 1 characterized in that said elastic coupling means consists of a spring means disposed radially relative to the axial center of said feeder frame and capable of flexing horizontally and vertically and secured at one end to said feeder frame and at the other end to said base to produce a torsional vibration about a vertical central axis and a lineal vibration along a vertical path.

5. The tuned two mass swing system of claim 1 characterized in that said elastic coupling means consists of an elastomer means secured on one side to said feeder frame and on the other side to said base.

6. The tuned two mass swing system of claim 5 characterized in that said elastomer means is an annular elastomer ring means about a vertical central axis of said feeder frame and capable of flexing torsional and vertical and secured at one side to said feeder frame and at the other side to said base to produce a torsional vibration about said vertical central axis and a lineal vibration along a vertical path.

7. The tuned two mass swing system of claim 5 characterized in that said elastomer means consists of the plurality of annular elastomers secured in concentric arrangement about a vertical central axis of said feeder frame and capable of flexing horizontal and vertical and secured at one side to said feeder frame and at the other side to said base to produce a torsional vibration about said vertical central axis and a lineal vibration along a vertical path.

8. The tuned two mass swing system of claim 5 characterized in that said elastomer means are symmetrically disposed relative to said feeder frame and said base.

9. The tuned two mass swing system of claim 5 characterized by adjustable means to alter the elastic characteristics of said elastic means to change the horizontal and vertical natural frequencies of the two mass swing system.

10. The tuned two mass swing system of claim 1 characterized in that said control means includes independent switch means to reverse the phase relation of either of said horizontal or vertical components of movement relative to other to reverse the direction of resultant feeding movement imposed on said feeder frame.

11. The tuned two mass swing system of claim 1 characterized in that said control means includes amplitude control means to independently and selectively vary the vibratory action of each of said vibratory exciter means to effect the full range of the relative and obtainable vibratory components of force of said horizontal and vertical vibratory exciter means alone and together with the combined resultant vibratory force imposed on said feeder frame.

12. The tuned two mass swing system of claim 1 characterized in that said control means includes magnitude control means to selectively vary the magnitude of each of said vibratory components of force of said vibratory exciter means, and variable impedance means in said control means connected to selectively adjust the phase relation between said horizontal and vertical vibratory forces of said exciter means to effect a full control range of the horizontal and the vertical components of force anD the time sequence of their respective magnitudes to change said excursionary path of displacement of said feeder frame and produce the optimum feed rate and action on said feeder frame for a given material feeding application.

13. A tuned two mass swing system including a base serving as a reaction mass and a feeder frame serving as a feeder mass to which horizontal and vertical components of vibration are imparted thereto, elastic coupling means connecting said base and feeder frame to permit vibratory displacement of the latter in horizontal and vertical modes of motion to permit horizontal and vertical components of force to be cooperatively effective to swing said feeder frame in a controlled excursionary vibratory path of displacement, horizontal and vertical vibratory exciter means to independently impart said horizontal and vertical components of force to said feeder means, and control means to variably adjust the magnitudes of each component independently and the operating phase relation of said horizontal and vertical components of force of said vibratory exciter means to selectively vary the form of said excursionary vibratory path of displacement to control the action of the material moved on said feeder frame.

14. In a circuit for independently controlling the horizontal and vertical components of vibration in a tuned two mass swing system comprising a vibratory exciter means connected to supply a vertical component of vibration to said two mass swing system and supplied by a free alternating current source, a second exciter means connected in parallel to said vertical vibratory exciter means to supply a horizontal component of vibration to said two mass swing system, an amplitude control means connected in series with each of said horizontal vibratory exciter means, and variable impedance connected in series with said vertical vibratory exciter means to variably adjust the operating phase relation between said vertical and horizontal components of vibration produced by said vibratory exciter means.

15. The control circuit of claim 14 characterized by a variable impedance connected in series with said horizontal vibratory exciter means.

16. The control circuit of claim 14 characterized in that said amplitude control means is an auto-transformer connected in parallel with each of said vibratory exciter means.

17. The control circuit of claim 14 characterized in that said amplitude control means includes a gate controlled semi-conductor rectifier having its anode and cathode connected in series with said vibratory exciter means, and gate controlled circuit connected in parallel with a variable impedance means.

18. The control circuit of claim 17 characterized in that said amplitude control means is connected in series with only one of said vibratory exciter means to provide different exciter frequencies to each of said vibratory exciter means.

19. The control circuit of claim 14 characterized by said switch means to reverse the connection of said amplitude control means to either of said vibratory exciter means.

20. The control circuit of claim 19 characterized in that said switch means is a double pole-double throw switch.

21. The circuit of claim 14 characterized in that said variable impedance includes a variable resistance in series with a wound electromagnet coil of said vertical vibratory exciter means.

22. In a vibratory material handling device, the method of independently varying the amplitude of vertical and horizontal components of vibration without effecting the horizontal and vertical natural frequencies of the vibratory material handling device comprising the steps of supporting the device for independent horizontal and vertical vibratory movement, independently regulating the horizontal and vertical vibratory feeding components of the material handling device to adjust the movement of the specific material therein, and independently regulating the amplitude of vibration of the independent horizontal and the independent vertical vibratory components to select the optimum material feed rate and selected action of the material in the device.

23. In a vibratory material handling device, the method of controlling the path of movement of materials in the device without effecting the horizontal and vertical natural frequencies of the vibratory material handling device comprising the steps of supporting the device for independent horizontal and vertical vibratory movement, independently regulating the horizontal and vertical vibratory feeding components to the material handling device to adjust the movement of the material therein, and independently regulating the phase relation of the horizontal and vertical vibratory components to change the excursionary path of motion imposed upon the material in the device.

24. In a vibratory material handling device, the method of varying the operating phase relation of vertical and horizontal components of vibration without effecting the horizontal and vertical natural frequencies of the device comprising the steps of supporting the device for independent horizontal and vertical vibratory movement, independently regulating the horizontal and vertical vibratory feeding components of the material handling device, and regulating the phase relation of the amplitude of vibration of a selected vibratory component relative to the other vibratory component while simultaneously regulating the magnitude of one vibratory component relative to the other to obtain the optimum material feed rate and determine the action on the material in the device for any given feeding application.

25. In a vibratory material handling device, the method of varying the direction of the path of movement of the material in the device comprising the steps of supporting the device for independent horizontal and vertical vibratory movement, providing controlled current impulses to impart independent regulated horizontal and vertical vibratory components to the device, and changing the phase sequence of the current impulses of the selected horizontal and vertical vibratory component to change the direction of the path of movement and action of the material in the device.

26. A vibratory electromagnetic drive for imparting torsional and axial vibrations to a working member used to convey materials for vibration, said drive comprising:

a base with shock-absorbers;

a traverse;

a common intermediate rigid member, resilient means connecting said rigid member to said base and to said traverse so as to form two resilient systems, one of which is supported by said base, and the other by said traverse, one of said systems including means enabling torsional vibrations and being stiff with respect to force applied along the longitudinal axis and yieldable to a torque acting on said axis, the other resilient system including means enabling axial vibrations and being stiff with respect to the torque applied to said longitudinal axis and yieldable to force directed along said axis; and

a pair of electromagnetic exciter means, each being coupled to a respective resilient system to impart torsional and axial vibrations to a working member connected to said traverse.

27. A vibratory electromagnetic drive as claimed in claim 26, wherein said electromagnetic exciter means respectively comprises an individual means for controlling the amplitude of its magnetic flux, thereby providing control over the amplitude of the torsional and axial vibrations respectively.

28. A vibratory eletromagnetic drive as claimed in claim 26, wherein at least one of the electromagnetic exciter means comprises means for controlling the relative phase shift of the magnetic fluxes induced by the electromagnetic exciter means to control the relative phase shift between the torsional and axial vibrations.

29. A tuned two mass feeder system including a base serving as a reaction mass and a feeder serving as a feeder mass supported from said base by elastic coupling means permitting independent axial and torsional compoNents of vibration effective to swing said feeder about a rotary central axis for feeding materials, independent axial vibratory exciter means and independent torsional vibratory exciter means to independently and respectively supply said axial and said torsional components of vibration to said feeder.

30. The two mass feeder system of claim 29 characterized in that said elastic coupling means consists of rigidly interconnected ends of independent axial and torsional resilient springs, the other ends of said independent springs connected respectively to said feeder frame and to said base.