US2756601A - Vibratory devices - Google Patents

Vibratory devices Download PDF

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US2756601A
US2756601A US495290A US49529055A US2756601A US 2756601 A US2756601 A US 2756601A US 495290 A US495290 A US 495290A US 49529055 A US49529055 A US 49529055A US 2756601 A US2756601 A US 2756601A
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Prior art keywords
excenter
unit
transom
weight
flexible
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US495290A
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Nigl Hans Carl
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Preparation Industrielle des Combustibles SA
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Preparation Industrielle des Combustibles SA
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    • 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
    • B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
    • B06B1/16—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving rotary unbalanced masses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G27/00—Jigging conveyors
    • B65G27/10—Applications of devices for generating or transmitting jigging movements
    • B65G27/16—Applications of devices for generating or transmitting jigging movements of vibrators, i.e. devices for producing movements of high frequency and small amplitude
    • B65G27/18—Mechanical devices
    • B65G27/20—Mechanical devices rotating unbalanced masses
    • 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
    • Y10T74/18064—Head motions

Definitions

  • This invention relates to vibratory units and has more particular relation to vibratory units of the type in which the vibrating body of the unit is vibrated by an excenterweight mechanism.
  • One object of the present invention is to provide a novel and improved vibrating unit comprising a displaceably resiliently supported body vibrated by an excenter-weight mechanism in which the centrifugal force produced by the excenter-weight mechanism is divided into two perpendicular periodical forces, one of which produces a rectilinear vibration of the excenter-weight mechanism in relation to the body, and the other a rectilinear vibration of the whole device.
  • Another object of the present invention is to provide an improved vibrating unit, as characterized above, wherein the excenter-weight mechanism is mounted on the body of the unit so that its axis of rotation is substantially parallel to the vertical planes outlined by the trajectories of each point of the body of the unit.
  • Another object of the present invention is to provide an improved vibrating unit, as characterized above, wherein said excenter-weight mechanism is mounted on said body by means of flexible blades so constructed and positioned as to permit a free vibration of the excenterweight mechanism in a direction extending transversely of the unit but assuring a rigid coupling with the unit in the direction parallel to the vertical planes outlined by the trajectories of each point of the body of the unit.
  • Another object of the invention is to provide an improved vibratory unit, as. characterized above, including shock absorbing means positioned to reduce the excessive amplitudes of the vibrations of the excenter-weight mechanism in the direction transverse of the unit, during the passage of the critical speed when starting up or stopping the device.
  • a further object of the present invention is to provide a novel and improved vibrating unit which is simple and sturdy in construction, inexpensive in manufacture, and eflicient in operation.
  • Fig. 1 is a diagrammatic view, in side elevation, of one embodiment of a vibrating unit constructed in accordance with the present invention
  • Fig. 2 is an end elevation of the apparatus shown in Fig. 1;
  • Fig. 3 is a diagrammatic view, in side elevation, of a modified form of the apparatus shown in Fig. 1;
  • Fig. 4 is an end elevation of the apparatus shown in Fig. 3.
  • the present invention provides a novel and improved vibrating unit and, in general, comprises a displaceably, resiliently supported body vibrated by an excenter-weight mechanism in which the centrifugal force produced by the excenter-weigh-t mechanism is divided into two perpendicular periodical forces, one of which produces a 2,756,601 Patented July 31, 1956 rectilinear vibration of the excenter-weight mechanism in relation to the body and the other a rectilinear vibration of the whole device.
  • excenter-weight mechanism comprising a transom positioned above and extending transversely of the body of the unit and carrying a shaft on which is mounted one or more excenter-weight pulleys with the pulleys connected in any suitable usual manner to a drive mechanism such as a pulley driven by a motor.
  • the shaft may be a fixed shaft on which the excenter-Weight pulley or pulleys are rotatably mounted, or they may be keyed on a shaft rotatable between bearings carried by the transom.
  • the only requirement being that the axis of rotation of the excenter-weight mechanism be substantially parallel to the vertical planes outlined by the trajectories of each point of the body of the unit.
  • the transom is supported on the body of the unit by blades flexible in a direcion extending transversely of the body and rigid in a direction parallel to the vertical planes outlined by the trajectories of each point of the body of the unit.
  • the apparatus includes a vibratory body 10 mounted upon a frame or base 11 as by means of a plurality of flexible blades 12.
  • the means for vibrating the body includes an excenter-weight pulley 13 rotatably mounted on a fixed shaft 14 carried by a transom, indicated generally at 15, positioned above and extending transversely of the body 10.
  • the transom is formed of parallel beam members 15' connected at their ends, and is supported as by means of flexible blades 16 having their upper and lower ends fixedly connected to the ends of the transom and the body 10, respectively'
  • the excenter-weight pulley may be rotated in any suitable usual manner, as by means of a belt starting from a pulley 17 driven by a motor M.
  • a helical spring 18 mounted on the frame 11 supports the body 10 so as to cancel out the component of the perpendicular weight in the direction of the blades 12.
  • the transom 15 receives an elliptical or circular vibrating motion, this motion is transmitted to the body 10 in the direction xx due to the rigidity of the flexible blades 16, while the transverse vibration along the line yy is absorbed by the flexibility of the blades 16 in a direction extending transversely of the body and is not transmitted to the body, resulting in a rectilinear vibration of the body following the direction xx.
  • the body 10 is fitted with shock absorbing means such as hydraulic devices 19 positioned to engage stop members 20 carried by the transom 15 and slow down the thrusts of the transom.
  • shock absorbing means such as hydraulic devices 19 positioned to engage stop members 20 carried by the transom 15 and slow down the thrusts of the transom.
  • Figs. 3 and 4 there is illustrated a modified form of vibratory unit.
  • the body 10 the flexible blades 16, the transom members 15" carrying shaft 14 and excenter-Weight pulley l3, and the driving means including pulley 17 and motor M are identical to the corresponding members as shown in Fig. 1.
  • the body 10' is supported by being suspended from a support frame, indicated at 21, as by means of four cables 22, each having its upper end portion supported as by helical springs 23 mounted on the frame 21.
  • the shock absorbing means for reducing the excessive amplitudes of the transom vibrations in a direction extending transversely of the body 10' are shown as comprising hydraulic devices 3 19" mounted on frame members 24 suspended from the supporting frame 21.
  • the excenter-weight mechanism has its free vibration in a generally horizontal direction perpendicular to the vertical plane of vibration of the body of the unit, as the flexible blades coupling the excenter-weight mechanism to the body of the unit are rigid in the direction parallel to the vertical vibrating plane of the body of the unit and flexible in the direction perpendicular to that direction.
  • a vibrating unit comprising a body to be vibrated; means for displaceably, resiliently supporting said body; means for vibrating said body including an excenterweight mechanism rotatable about a single axis extending in a plane substantially parallel to the vertical planes outlined by the trajectory of each point of said body; means for mounting said excenter-weight mechanism on said body including flexible members connecting the excenterweight mechanism to said body, said flexible members being so positioned as to be flexible in a direction extending transversely of said body and rigid in a direction extending parallel to said vertical planes outlined by the trajectory of each point of said body, whereby the free vibration of the excenter-weight mechanism is in a direction extending transversely of said body.
  • shock absorbing means positioned to reduce the excessive amplitudes of the vibrations of the excenter-weight mechanisrn in the direction transverse to the body during the passage of the critical speed when starting up and stopping the rotation of the excentric-Weight mechanism.
  • a vibrating unit comprising a body to be vibrated, means for displaceably resiliently supporting said body, and means for vibrating said body including transom members positioned above and extending transversely of said body, an excenter-weight pulley rotatably mounted on said transom members for rotation about an axis extending in a plane substantially parallel to the vertical planes outlined by the trajectory of each point of said body, and flexible blades having their upper ends connected to the ends of said transom members and their lower ends connected to said body, said blades being so positioned as to be flexible in a direction extending transversely of said body and rigid in a direction extending parallel to said planes outlined by the trajectory of each point of said body, whereby the free vibration of the excenter-weight pulley is in a direction extending transversely of said body.
  • said means for supporting said body includes a support member and a plurality of flexible blades having their lower ends fixedly attached to said support member and their upper ends fixedly attached to said body.
  • said means for supporting said body includes a support memher having a plurality of cables depending therefrom and flexibly connected thereto with their lower ends connected to said body.
  • shock absorbing means positioned to engage said transom memher to reduce the excessive amplitudes of the vibrations of the excenter-weight pulley in the direction transverse to said body.
  • shock absorbing means comprises hydraulic mechanism mounted on said body and positioned to engage stop members carried by said transom members.
  • shock absorbing means comprises a pair of hydraulic mechanisms each mounted on a bracket member carried by the means for supporting said body and positioned to be engaged by the ends of said transom members.

Description

July 31, 1956 H. c. NlGL 2,756,601
VIBRATORY DEVICES Filed March 18, 1955 2 Sheets-Sheet l y Z X n SHOCK ABSORBER SHOCK ABSORBER 24 HANS C. NIGL man- W ATTORNEYS 1, 1956 H. c. NIGL ,15
VIBRATORY DEVICES Filed March 18, 1955 2 Sheets-Sheet 2 SHOCK ABSORBER SHOCK ABSORBER -H' INVENTOR HANS C. N I GL BY WW ATTORNEYS United States Patent VIBRATORY DEVICES Hans Carl Nigl, Fontainebleau, France, assignor to Societe Preparation Industrielle des Combustibles, Fontainebleau, France, a French company Application March 18, 1955, Serial No. 495,290
Claims priority, application France March 19, 1954 '10 Claims. (Cl. 74--26) This invention relates to vibratory units and has more particular relation to vibratory units of the type in which the vibrating body of the unit is vibrated by an excenterweight mechanism.
One object of the present invention is to provide a novel and improved vibrating unit comprising a displaceably resiliently supported body vibrated by an excenter-weight mechanism in which the centrifugal force produced by the excenter-weight mechanism is divided into two perpendicular periodical forces, one of which produces a rectilinear vibration of the excenter-weight mechanism in relation to the body, and the other a rectilinear vibration of the whole device.
Another object of the present invention is to provide an improved vibrating unit, as characterized above, wherein the excenter-weight mechanism is mounted on the body of the unit so that its axis of rotation is substantially parallel to the vertical planes outlined by the trajectories of each point of the body of the unit.
Another object of the present invention is to provide an improved vibrating unit, as characterized above, wherein said excenter-weight mechanism is mounted on said body by means of flexible blades so constructed and positioned as to permit a free vibration of the excenterweight mechanism in a direction extending transversely of the unit but assuring a rigid coupling with the unit in the direction parallel to the vertical planes outlined by the trajectories of each point of the body of the unit.
Another object of the invention is to provide an improved vibratory unit, as. characterized above, including shock absorbing means positioned to reduce the excessive amplitudes of the vibrations of the excenter-weight mechanism in the direction transverse of the unit, during the passage of the critical speed when starting up or stopping the device.
A further object of the present invention is to provide a novel and improved vibrating unit which is simple and sturdy in construction, inexpensive in manufacture, and eflicient in operation.
Other objects and advantages of the invention will appear in the following specification when considered with the accompanying drawings, wherein:
Fig. 1 is a diagrammatic view, in side elevation, of one embodiment of a vibrating unit constructed in accordance with the present invention;
Fig. 2 is an end elevation of the apparatus shown in Fig. 1;
Fig. 3 is a diagrammatic view, in side elevation, of a modified form of the apparatus shown in Fig. 1; and
Fig. 4 is an end elevation of the apparatus shown in Fig. 3.
The present invention provides a novel and improved vibrating unit and, in general, comprises a displaceably, resiliently supported body vibrated by an excenter-weight mechanism in which the centrifugal force produced by the excenter-weigh-t mechanism is divided into two perpendicular periodical forces, one of which produces a 2,756,601 Patented July 31, 1956 rectilinear vibration of the excenter-weight mechanism in relation to the body and the other a rectilinear vibration of the whole device. The invention contemplates the use of excenter-weight mechanism comprising a transom positioned above and extending transversely of the body of the unit and carrying a shaft on which is mounted one or more excenter-weight pulleys with the pulleys connected in any suitable usual manner to a drive mechanism such as a pulley driven by a motor. The shaft may be a fixed shaft on which the excenter-Weight pulley or pulleys are rotatably mounted, or they may be keyed on a shaft rotatable between bearings carried by the transom. The only requirement being that the axis of rotation of the excenter-weight mechanism be substantially parallel to the vertical planes outlined by the trajectories of each point of the body of the unit. The transom is supported on the body of the unit by blades flexible in a direcion extending transversely of the body and rigid in a direction parallel to the vertical planes outlined by the trajectories of each point of the body of the unit.
Referring now to the drawings, there is diagrammatically illustrated in Figs. 1 and 2, one embodiment of apparatus constructed in accordance with the present invention. As there shown, the apparatus includes a vibratory body 10 mounted upon a frame or base 11 as by means of a plurality of flexible blades 12. The means for vibrating the body includes an excenter-weight pulley 13 rotatably mounted on a fixed shaft 14 carried by a transom, indicated generally at 15, positioned above and extending transversely of the body 10. The transom is formed of parallel beam members 15' connected at their ends, and is supported as by means of flexible blades 16 having their upper and lower ends fixedly connected to the ends of the transom and the body 10, respectively' The excenter-weight pulley may be rotated in any suitable usual manner, as by means of a belt starting from a pulley 17 driven by a motor M. A helical spring 18 mounted on the frame 11 supports the body 10 so as to cancel out the component of the perpendicular weight in the direction of the blades 12.
Through the rotation of the excenter-weight pulley, the transom 15 receives an elliptical or circular vibrating motion, this motion is transmitted to the body 10 in the direction xx due to the rigidity of the flexible blades 16, while the transverse vibration along the line yy is absorbed by the flexibility of the blades 16 in a direction extending transversely of the body and is not transmitted to the body, resulting in a rectilinear vibration of the body following the direction xx.
To reduce the excessive amplitudes of the transverse vibrations during the passage of the critical speed when starting up or stopping the device, the body 10 is fitted with shock absorbing means such as hydraulic devices 19 positioned to engage stop members 20 carried by the transom 15 and slow down the thrusts of the transom.
In Figs. 3 and 4 there is illustrated a modified form of vibratory unit. In this particular modification, the body 10 the flexible blades 16, the transom members 15" carrying shaft 14 and excenter-Weight pulley l3, and the driving means including pulley 17 and motor M are identical to the corresponding members as shown in Fig. 1. However, in this modification, the body 10' is supported by being suspended from a support frame, indicated at 21, as by means of four cables 22, each having its upper end portion supported as by helical springs 23 mounted on the frame 21.
In this particular modification, the shock absorbing means for reducing the excessive amplitudes of the transom vibrations in a direction extending transversely of the body 10', are shown as comprising hydraulic devices 3 19" mounted on frame members 24 suspended from the supporting frame 21.
In this modification, as in the modification shown in Figs. 1 and 2, the excenter-weight mechanism has its free vibration in a generally horizontal direction perpendicular to the vertical plane of vibration of the body of the unit, as the flexible blades coupling the excenter-weight mechanism to the body of the unit are rigid in the direction parallel to the vertical vibrating plane of the body of the unit and flexible in the direction perpendicular to that direction.
From the foregoing, it readily will be apparent that there has been provided a novel and improved vibratory unit in which the body of the unit is vibrated by means of an excenter-weight mechanism mounted on the body so that its axis of rotation is substantially parallel to the vertical planes outlined by the trajectory of each point of the body, said excenter-weight mechanism being connected to the body by flexible blades so arranged that the coupling of the mechanism with the body is rigid in the direction parallel to the vertical vibrating plane of the body and flexible in the direction perpendicular to that plane.
Obviously, the invention is not restricted to the particular embodiments thereof herein shown and described.
What is claimed is:
1. A vibrating unit comprising a body to be vibrated; means for displaceably, resiliently supporting said body; means for vibrating said body including an excenterweight mechanism rotatable about a single axis extending in a plane substantially parallel to the vertical planes outlined by the trajectory of each point of said body; means for mounting said excenter-weight mechanism on said body including flexible members connecting the excenterweight mechanism to said body, said flexible members being so positioned as to be flexible in a direction extending transversely of said body and rigid in a direction extending parallel to said vertical planes outlined by the trajectory of each point of said body, whereby the free vibration of the excenter-weight mechanism is in a direction extending transversely of said body.
2. Apparatus as set forth in claim 1, wherein said body is supported on a frame by a plurality of flexible blades.
3. Apparatus as set forth in claim 1, wherein said body is suspended from a support by a plurality of flexible supporting means.
4. Apparatus as set forth in claim 1, including shock absorbing means positioned to reduce the excessive amplitudes of the vibrations of the excenter-weight mechanisrn in the direction transverse to the body during the passage of the critical speed when starting up and stopping the rotation of the excentric-Weight mechanism.
5. A vibrating unit comprising a body to be vibrated, means for displaceably resiliently supporting said body, and means for vibrating said body including transom members positioned above and extending transversely of said body, an excenter-weight pulley rotatably mounted on said transom members for rotation about an axis extending in a plane substantially parallel to the vertical planes outlined by the trajectory of each point of said body, and flexible blades having their upper ends connected to the ends of said transom members and their lower ends connected to said body, said blades being so positioned as to be flexible in a direction extending transversely of said body and rigid in a direction extending parallel to said planes outlined by the trajectory of each point of said body, whereby the free vibration of the excenter-weight pulley is in a direction extending transversely of said body.
6. Apparatus as set forth in claim 5, wherein said means for supporting said body includes a support member and a plurality of flexible blades having their lower ends fixedly attached to said support member and their upper ends fixedly attached to said body.
7. Apparatus as set forth in claim 5, wherein said means for supporting said body includes a support memher having a plurality of cables depending therefrom and flexibly connected thereto with their lower ends connected to said body.
8. Apparatus as set forth in claim 5, including shock absorbing means positioned to engage said transom memher to reduce the excessive amplitudes of the vibrations of the excenter-weight pulley in the direction transverse to said body.
9. Apparatus as set forth in claim 8, wherein said shock absorbing means comprises hydraulic mechanism mounted on said body and positioned to engage stop members carried by said transom members.
10. Apparatus as set forth in claim 8, wherein said shock absorbing means comprises a pair of hydraulic mechanisms each mounted on a bracket member carried by the means for supporting said body and positioned to be engaged by the ends of said transom members.
References Cited in the file of this patent UNITED STATES PATENTS 1,705,619 Kendall Mar. 19, 1929 FOREIGN PATENTS 45,426 Switzerland Oct. 3, 1908
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967434A (en) * 1955-12-27 1961-01-10 Mahlfeldt Walter Oscillating system excited at or in the neighbourhood of resonance

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH45426A (en) * 1908-10-03 1909-11-16 Oskar Soder Drive device on objects to be moved back and forth
US1705619A (en) * 1925-06-19 1929-03-19 Adamson Stephens Mfg Co Vibrating screen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH45426A (en) * 1908-10-03 1909-11-16 Oskar Soder Drive device on objects to be moved back and forth
US1705619A (en) * 1925-06-19 1929-03-19 Adamson Stephens Mfg Co Vibrating screen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967434A (en) * 1955-12-27 1961-01-10 Mahlfeldt Walter Oscillating system excited at or in the neighbourhood of resonance

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