US3796109A - Automatic balancing device - Google Patents

Automatic balancing device Download PDF

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Publication number
US3796109A
US3796109A US00132505A US3796109DA US3796109A US 3796109 A US3796109 A US 3796109A US 00132505 A US00132505 A US 00132505A US 3796109D A US3796109D A US 3796109DA US 3796109 A US3796109 A US 3796109A
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US
United States
Prior art keywords
balancing device
bodies
housing
spindle
rings
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 - Lifetime
Application number
US00132505A
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English (en)
Inventor
J Lagerwey
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.)
Reactor Centrum Nederland
Original Assignee
Reactor Centrum Nederland
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 Reactor Centrum Nederland filed Critical Reactor Centrum Nederland
Application granted granted Critical
Publication of US3796109A publication Critical patent/US3796109A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/32—Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels
    • F16F15/36—Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels operating automatically, i.e. where, for a given amount of imbalance, there is movement of masses until balance is achieved
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/14—Balancing rotary bowls ; Schrappers
    • 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
    • Y10T74/21—Elements
    • Y10T74/2121—Flywheel, motion smoothing-type

Definitions

  • ABSTRACT An automatic self-adjusting balancing device for a 21 Appl. No.1 132,505
  • the invention relates to an automatic selfadjusting balancing device for a rotational body that can rotate around a vertical spindle, consisting of a hollow ringshaped housing in which a number of loose rotational bodies are incorporated, each having at least one limiting rim edge, which surround or span the said vertical spindle and which, on rotation of the housing, can move outwards under the action of the centrifugal force.
  • At least one rotational body has at the circumference of its outer rim edge a smaller diameter on the upper side then on the underside. This shaping enables the rotational body to tilt around a point on its circumference that is situated on the larger diameter. Especially if, according to a preferred embodiment, at least one outher rim edge is externally frustrum-shaped, such rotational body when in the moved-out position can be kept in linear contact with the inner wall of the hollow ring-shaped housing.
  • the number of rings assembled in a hollow ringshaped housing is at least two, although three or more rings may be used.
  • the rotational bodies referred to in the above may consist, for instance, of rings or disks. These rings or disks need not, however, have a flat shape but may form parts of convex dish walls.
  • the rotational bodies areexecuted as rings, which rings at their largest diameter are spanned, with slight clearance, by a wall portion of the ring-shaped housing.
  • This clearance should be just sufficient to allow the rings to move outwards to the required end position.
  • the rotational bodies may have a dish-shaped wall.
  • the rotational body itself may have the shape of a dish.
  • rings occurring in the foregoing may also mean a hoop-shaped or sleeve-shaped construction.
  • FIG. 1 depicts a vertical cross-section of a centrifuge in which the invention is applied
  • FIG. 2 shows in vertical cross-section a detail of a balancing device
  • FIG. 3 shows a variant of such balancing device
  • FIG. 4 shows a balancing device which is suitable for containing a tube or vessel of fairly large diameter
  • FIGS. 5 to 8 inclusive show variants of the rotational bodies which can be used in the balancing device according to the invention.
  • Reference number 1 in FIG. 1 represents a centrifuging drum having a vertical spindle 2 on its underside. This spindle is rigidly fixed at 3 to the bottom 4 of the centrifuging drum.
  • the centrifuging drum 1 has on its upper end an aperture 5 through which materials can be passed into or out of the centrifuging drum.
  • Spindle 2 of the centrifuge has on its underside a supporting bearing 6. Moreover, an additional supporting bearing may be fitted at 7 if necessary.
  • Mounted on spindle 2 is the rotor 8 of an electric motor running within a stator 9 which is fixed via construction 10 to housing 11 of the centrifuge, which housing is not further indicated.
  • Fitted to the underside of the bottom 4 is a lid 12, so positioned that a space 13 is formed within which two balancing rings 14 and 15 are mounted.
  • the figure shows, moreover, that it is also possible to mount balancing rings on the upper end of the drum 1.
  • These rings 16 and 17 are positioned inside an annular cavity 18 recessed inside a thickened edgelike part 19 of the wall of the centrifuging drum. It'is, of course, possible to close this annular space entirely, so that there is no risk that the material to be processed in the centrifuge, for instance sugar, might become lodged between the balancing rings.
  • This closure facility is, however, not illustrated in the drawing, since F 1G. 1 is intended as a diagrammatic representation.
  • FIG. 2 clearly shows the way in which rings 14 and 15 may be formed.
  • Each ring is provided with a central aperture 20 and 21 respectively, through which passes the spindle 2 by means of which the centrifuging drum is driven.
  • Each ring is given a frustum-shaped finish on its outer side, so that surface areas 22 and 23 respectively are formed.
  • the balancing rings proceed to tilt in such a way that near the tilting point a linear contact is established between the outer sides 22 and 23 and the inner side of the wall components 24 and 25 respectively of the hollow annular housing 12 in which the rings are positioned.
  • FIG. 4 large hoop-shaped rings 29 and 30 are used in the balancing device 31.
  • the bottom of the hollow annular housing 32 has a ridge 33 against which the inner ring 30 can rest in such a way that tilting of ring 30 around a point on the inner side of ridge 33 is possible.
  • This figure clearly shows that the balancing device according to the invention can be mounted in a simple manner on the outer side of cylindrical rotational bodies 34 of fairly large diameter. If desired, such balancing device 31 may be mounted at several points on a rotational body, so that damping can be fully controlled even with longer rotational bodies.
  • FIGS. 5, 6, 7 and 8 show a further number of possible solids of possible rotational bodies, whilst FIG. 5 illustrates a dish with a frustrum-shaped outer edge, and
  • FIG. 6 shows an inverted dish in which the outer side near the bend is somewhat rounded.
  • FIG. 7 illustrates a dish whose bottom is recessed.
  • the recess may be formed in such a way that it influences the position of the centre of gravity.
  • the position of the centre of gravity viz. the distance of the centre of gravity from a ring or disk, measured in the vertical direction to a supporting surface, is a matter of great importance to the working of the present balancing device.
  • the whole operation of the device is based on the fact that by tilting a rotational body its centre of gravity, which at first was centrally situated, shifts towards the outer side. As soon as this centre of gravity is situated to a certain distance from the axis of rotation, the body can perform its balancing action.
  • FIG. 8 illustrates a sleeve-like body which can likewise be used as a balancing body.
  • An automatic self-adjusting balancing device for a member mounted for rotation around a vertical spindle comprising a hollow housing rotating with said member and having an inner circular wall component which is coaxial with the spindle; at least two loose rotational bodies within said housing, each body having a circular rim edge which spans said vertical spindle, said rim edge having a smaller diameter on its upper side than on its lower side, at least one of said bodies being tiltable about its larger diameter against said inner wall component of said housing.
  • a balancing device as in claim 1 wherein at least one of said bodies is a ring and wherein another of said bodies resides within said one body.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Centrifugal Separators (AREA)
US00132505A 1970-04-27 1971-04-08 Automatic balancing device Expired - Lifetime US3796109A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7006072A NL7006072A (de) 1970-04-27 1970-04-27

Publications (1)

Publication Number Publication Date
US3796109A true US3796109A (en) 1974-03-12

Family

ID=19809959

Family Applications (1)

Application Number Title Priority Date Filing Date
US00132505A Expired - Lifetime US3796109A (en) 1970-04-27 1971-04-08 Automatic balancing device

Country Status (8)

Country Link
US (1) US3796109A (de)
JP (1) JPS5369B1 (de)
CA (1) CA929380A (de)
DE (1) DE2120428A1 (de)
FR (1) FR2089732A5 (de)
GB (1) GB1351174A (de)
NL (1) NL7006072A (de)
SE (1) SE362800B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4547185A (en) * 1983-09-13 1985-10-15 Alfa-Laval Separation Ab Balancing of centrifuge rotors
US4855042A (en) * 1986-12-12 1989-08-08 The United Company Apparatus for minimizing reactive forces on a gimbal-mounted centrifuge
WO2000029122A1 (en) * 1998-11-12 2000-05-25 Genevac Limited Automatic balancing in centrifuges
WO2001008807A1 (de) * 1999-08-03 2001-02-08 Eppendorf Ag Unwuchtausgleichsvorrichtung für zentrifugen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2347640B (en) * 1999-03-03 2001-02-07 David Godfrey Williams Method and apparatus for conditioning solder paste

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7455A (en) * 1850-06-25 Improvement in electric telegraphs
US322069A (en) * 1885-07-14 Emil eothe
US331450A (en) * 1885-12-01 rothe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7455A (en) * 1850-06-25 Improvement in electric telegraphs
US322069A (en) * 1885-07-14 Emil eothe
US331450A (en) * 1885-12-01 rothe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4547185A (en) * 1983-09-13 1985-10-15 Alfa-Laval Separation Ab Balancing of centrifuge rotors
US4855042A (en) * 1986-12-12 1989-08-08 The United Company Apparatus for minimizing reactive forces on a gimbal-mounted centrifuge
WO2000029122A1 (en) * 1998-11-12 2000-05-25 Genevac Limited Automatic balancing in centrifuges
WO2001008807A1 (de) * 1999-08-03 2001-02-08 Eppendorf Ag Unwuchtausgleichsvorrichtung für zentrifugen

Also Published As

Publication number Publication date
JPS5369B1 (de) 1978-01-05
NL7006072A (de) 1971-10-29
FR2089732A5 (de) 1972-01-07
SE362800B (de) 1973-12-27
CA929380A (en) 1973-07-03
DE2120428A1 (de) 1971-11-11
GB1351174A (en) 1974-04-24

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