EP0488005B1 - Elektromagnetischer Schwingungserreger - Google Patents

Elektromagnetischer Schwingungserreger Download PDF

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Publication number
EP0488005B1
EP0488005B1 EP91119614A EP91119614A EP0488005B1 EP 0488005 B1 EP0488005 B1 EP 0488005B1 EP 91119614 A EP91119614 A EP 91119614A EP 91119614 A EP91119614 A EP 91119614A EP 0488005 B1 EP0488005 B1 EP 0488005B1
Authority
EP
European Patent Office
Prior art keywords
air gap
housing
armature
oscillator according
pole
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
EP91119614A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0488005A2 (de
EP0488005A3 (en
Inventor
Gerd Fechner
Bernard Schreiner
Wolfgang Steuer
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of EP0488005A2 publication Critical patent/EP0488005A2/de
Publication of EP0488005A3 publication Critical patent/EP0488005A3/de
Application granted granted Critical
Publication of EP0488005B1 publication Critical patent/EP0488005B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system

Definitions

  • the invention relates to an electromagnetic vibration exciter with an electromagnet made of a U-shaped magnetic core with an excitation winding which is cast in a housing with casting resin, and an armature arranged at a distance as an air gap D in front of the pole faces of the magnetic core, the armature in the air gap D vibrates with an amplitude s relative to the pole faces.
  • Such an electromagnetic vibration exciter is known from DE-PS 11 06 103 or from DE-GM 66 04 827.
  • Such electromagnetic vibration exciters are used as so-called magnetic vibrators in a wide variety of embodiments for driving vibratory conveyor troughs for bulk goods and small parts and for driving screens, separators or metering devices.
  • Electromagnetic vibration exciters represent a two-mass vibration system in which the magnet system and the armature vibrate in opposite directions to each other.
  • the magnet system and the armature are usually coupled to one another via springs.
  • the excitation of the vibration exciter is usually done with single or double mains frequency. However, deviations from these drive frequencies are also possible for special applications.
  • the electromagnet was previously attached to a supporting part, for example a housing, with the aid of fastening lugs or bolts, for some time now the electromagnet, that is to say the U-shaped magnetic core with its excitation winding, has been closed in a housing with cast resin shed.
  • the electromagnet and the armature oscillate in opposite directions to each other.
  • the air gap D is to be dimensioned such that during operation, the armature oscillates within this air gap with an amplitude s that is smaller than the air gap. This is the only way to avoid that the electromagnet and the armature cannot knock together and thereby destroy the drive system.
  • the air gap D is to be dimensioned so large that the electromagnet and the armature are prevented from slamming together
  • the required inductive magnetizing current is smaller the smaller the air gap, which is due to the current load and the design of the power supply is to be aimed for.
  • the idle air gap is therefore expediently dimensioned in such a way that both requirements, the avoidance of the oscillating components collapsing and the lowest possible power consumption of the power supply unit, are met.
  • the electromagnetic vibration drives are operated with a regulated supply voltage in order to at least compensate for the changes in the useful weight.
  • the components and materials of the magnet system change their volume or their geometry depending on the temperature.
  • the cast resins used have a larger coefficient of expansion than steel or even the frequently used cast iron housing.
  • the housing is attached to a support element via brackets, the temperature-related changes in the brackets or the support frame also being noticeable in a change in the air gap.
  • the invention has for its object to provide a vibration exciter of the type mentioned, in which there is almost no temperature-related change in the width of the air gap.
  • the magnet system 1 consists of an electromagnet and an armature 2.
  • the electromagnet has a U-shaped magnetic core 3, which is provided with an excitation winding 4.
  • the magnetic core 3 and the excitation winding 4 are connected to the housing 6 via the casting resin 5.
  • the housing 6 is usually made of gray cast iron.
  • the armature 2 is located opposite the pole faces 7 of the magnetic core at a predetermined distance, which in the idle state is referred to as the idle air gap or generally as the air gap D.
  • the armature vibrates in a parallel orientation perpendicular to the pole faces with an amplitude s which is not shown in the figure.
  • the housing 6 of the electromagnet is attached to a support frame, not shown, via brackets 8, 8 '.
  • the height of the housing, based on the pole faces 7, is assumed as the length H.
  • the brackets 8 'shown in dashed lines are located at the end of the housing remote from the pole. The consequence of this is that when the temperature rises to the operating temperature of the vibration exciter, the housing expands by the value ⁇ H. The air gap D at operating temperature is reduced by this value.
  • the air gap would have to be increased in accordance with the change in length ⁇ H.
  • the influence of the housing expansion on the air gap can be avoided in that the bracket 8 according to the invention is attached to a neutral point on the housing. H. as close as possible to the poles of the magnetic core. Then an increase in the housing height H does not affect the air gap.
  • the magnetic core is connected to the housing by means of a rigid strut.
  • the press plates 9 which press the sheets of the core yoke together, are firmly connected to the housing by means of a screw connection 10. This also prevents the magnetic core from lifting out of the housing 6 in the event of thermal expansion, in particular of the casting resin.
  • claw-shaped projections 11 are provided on the inside of the housing 6, which ensure clawing between the casting resin and the housing and thus largely prevent the poles from lifting off.
  • the temperature-related reduction in the air gap width can, in principle, also be avoided by a different type of measure, or even further reduced together with one or more of the aforementioned measures.
  • expansion elements 12 are provided, which are provided in the fastening of the magnet system via plate springs 14. These expansion elements can be dimensioned such that a temperature-related change in the air gap by - ⁇ D is compensated for by the corresponding amount + ⁇ D.
  • the expansion elements 12 can be cuboid or cylindrical. They have not shown recesses for screws 15, which are used in connection with nuts 16 for fastening the housing 6.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Jigging Conveyors (AREA)
EP91119614A 1990-11-29 1991-11-18 Elektromagnetischer Schwingungserreger Expired - Lifetime EP0488005B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4037994 1990-11-29
DE4037994A DE4037994C1 (enrdf_load_stackoverflow) 1990-11-29 1990-11-29

Publications (3)

Publication Number Publication Date
EP0488005A2 EP0488005A2 (de) 1992-06-03
EP0488005A3 EP0488005A3 (en) 1993-01-20
EP0488005B1 true EP0488005B1 (de) 1994-09-28

Family

ID=6419161

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91119614A Expired - Lifetime EP0488005B1 (de) 1990-11-29 1991-11-18 Elektromagnetischer Schwingungserreger

Country Status (6)

Country Link
US (1) US5406152A (enrdf_load_stackoverflow)
EP (1) EP0488005B1 (enrdf_load_stackoverflow)
AT (1) ATE112188T1 (enrdf_load_stackoverflow)
AU (1) AU647546B2 (enrdf_load_stackoverflow)
DE (2) DE4037994C1 (enrdf_load_stackoverflow)
ES (1) ES2061151T3 (enrdf_load_stackoverflow)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4210287C1 (en) * 1992-03-28 1993-02-11 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De EM oscillation inducer with U=shaped core for windings - has measurement value pick=up for high efficiency but preventing armature in air gap impacting shanks of magnetic core
US5315190A (en) * 1992-12-22 1994-05-24 Stirling Technology Company Linear electrodynamic machine and method of using same
FR2778013A1 (fr) * 1998-04-24 1999-10-29 Casadio Sa Vibrateur electromagnetique comprenant des moyens d'etancheite
DE19832190C2 (de) * 1998-07-17 2003-06-26 Vibtech Vibrationstechnische S Magnetisch angetriebenes Schwinggerät
JP4073584B2 (ja) * 1998-11-04 2008-04-09 株式会社ミクニ 弁駆動装置
BR8102102Y1 (pt) * 2001-08-09 2009-05-05 disposição na montagem da bobina no núcleo.
US6651807B2 (en) * 2001-12-18 2003-11-25 Fmc Technologies, Inc. Parts feeder
US6914351B2 (en) * 2003-07-02 2005-07-05 Tiax Llc Linear electrical machine for electric power generation or motive drive
DE10335141B4 (de) * 2003-07-31 2006-09-21 Siemens Ag Elektrische Maschine mit Kühlmittelführungskanal
USD537035S1 (en) * 2005-05-12 2007-02-20 Imv Corporation Vibration generator
US20070108103A1 (en) * 2005-11-16 2007-05-17 Guy Mc Clung Vibratory separators and operations
US20090261665A1 (en) * 2008-04-17 2009-10-22 Leao Wang Electromagnetic vibrating mechanism
US8878401B2 (en) * 2010-11-10 2014-11-04 Lg Innotek Co., Ltd. Linear vibrator having a trembler with a magnet and a weight

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3345525A (en) * 1967-10-03 Adjustable electric magnetic vibrator
DE1106103B (de) * 1957-10-31 1961-05-04 Licentia Gmbh Elektromagnetischer Schwingungserreger in Form eines federgekoppelten Zweimassenschwingsystems und Verfahren zu seiner Herstellung
US3130333A (en) * 1961-05-17 1964-04-21 Walbro Corp Electric pump motor
US3167670A (en) * 1962-12-26 1965-01-26 Link Belt Co Electromagnetic vibrators
CA768731A (en) * 1963-03-12 1967-10-03 V. Braine Michael Resonator structure and method of construction
US3312841A (en) * 1963-10-22 1967-04-04 Shinko Electric Co Ltd Electromagnetic vibrator
DE6604827U (de) * 1968-05-05 1970-02-26 Licentia Gmbh Magnetvibrator
DE2050647A1 (de) * 1970-10-15 1972-05-31 Transformatoren Union Ag Elektromagnetischer Vibrator
US4074154A (en) * 1976-05-27 1978-02-14 Ife Gesellschaft Mbh Electromagnetic vibrator with improved spring mounts
DE3204534C2 (de) * 1982-02-10 1984-02-23 Chemie Und Filter Gmbh, Verfahrenstechnik Kg, 6900 Heidelberg Elektromagnetisch betätigte Membranpumpe
JPS6167400A (ja) * 1984-09-11 1986-04-07 Sanden Corp 電気機械振動変換装置
JP2531876Y2 (ja) * 1988-12-15 1997-04-09 日東工器株式会社 電磁式ダイアフラムポンプ用マグネットホルダ
US4950931A (en) * 1989-01-17 1990-08-21 Motorola, Inc. Vibrator
US4994698A (en) * 1990-06-13 1991-02-19 General Electric Company Vibratory linear motor system

Also Published As

Publication number Publication date
DE4037994C1 (enrdf_load_stackoverflow) 1992-03-05
EP0488005A2 (de) 1992-06-03
ATE112188T1 (de) 1994-10-15
US5406152A (en) 1995-04-11
ES2061151T3 (es) 1994-12-01
DE59103110D1 (de) 1994-11-03
AU647546B2 (en) 1994-03-24
EP0488005A3 (en) 1993-01-20
AU8805091A (en) 1992-06-04

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