EP0398078A2 - Vibrateur compact à piston - Google Patents

Vibrateur compact à piston Download PDF

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Publication number
EP0398078A2
EP0398078A2 EP90108347A EP90108347A EP0398078A2 EP 0398078 A2 EP0398078 A2 EP 0398078A2 EP 90108347 A EP90108347 A EP 90108347A EP 90108347 A EP90108347 A EP 90108347A EP 0398078 A2 EP0398078 A2 EP 0398078A2
Authority
EP
European Patent Office
Prior art keywords
piston
housing
bore
vibrator
air connection
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.)
Withdrawn
Application number
EP90108347A
Other languages
German (de)
English (en)
Other versions
EP0398078A3 (fr
Inventor
Dietrich Kröger
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.)
Netter GmbH
Original Assignee
Netter 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 Netter GmbH filed Critical Netter GmbH
Publication of EP0398078A2 publication Critical patent/EP0398078A2/fr
Publication of EP0398078A3 publication Critical patent/EP0398078A3/fr
Withdrawn legal-status Critical Current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
    • B06B1/18—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid
    • B06B1/183—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid operating with reciprocating masses

Definitions

  • the present invention relates to a piston vibrator consisting of a housing with at least one cylindrical bore and at least one air connection guided laterally to the bore and a piston which is longitudinally displaceable in the bore.
  • piston vibrators have a variety of applications, especially where bulk materials are to be compressed, for. B. in the packaging industry or in the manufacture and compression of castings, for. B. made of concrete or similar material.
  • piston vibrators are considered necessary and sensible components of the devices to which they are attached, but they also occasionally have a space-consuming and disruptive effect. This can lead to the use of smaller and less powerful piston vibrators under certain circumstances than would be desirable for the work result. For this reason there is a need to make piston vibrators more powerful with the same external dimensions or, conversely, to make them more compact while maintaining the same performance.
  • the performance of a piston vibrator essentially depends only on the cross-sectional area of the bore and the mass of the piston, which also results from this cross-sectional area and the length of the piston, which in turn is due to the length of the piston vibrator minus the piston travel and the wall thickness of the cover and base of the vibrator housing is limited.
  • piston vibrators are also manufactured as turned parts in relatively large numbers.
  • the housing of the vibrators therefore generally have a more or less cylindrical shape.
  • at least one air connection is attached to the side of the cylindrical wall of such a housing.
  • the air connection must be designed to be pressure-resistant and therefore requires a certain minimum wall thickness of the housing wall in which it is attached.
  • such an air connection consists of a bore with an internal thread. But other conceivable air connections also require a certain minimum wall thickness of the vibrator housing.
  • Commercial hose nozzles have z. B. a given thread length.
  • the vibrator housing essentially consists of a hollow cylinder with a base, cover and corresponding air connections, the hollow cylinder being relatively large for the purpose of the pressure-resistant design of the air connections and / or for adaptation to specified standards Has wall thickness.
  • the total diameter of the piston vibrator thus results from the diameter of the cylindrical bore plus twice the wall thickness.
  • the overall diameter is therefore essentially determined by the wall thickness of the housing wall, which in practice is in the range of approximately 10 mm and above.
  • the invention is therefore based on the object of providing a piston vibrator which, for a given outer diameter, has a higher performance or the same Performance is more compact and smaller.
  • cylindrical bore runs asymmetrically to the outer wall surface of the housing at least at the axial height of the air connection.
  • a piston vibrator has one or more air connections in its lateral housing wall, which, as already mentioned, require a certain minimum wall thickness. If the outer housing wall runs asymmetrically or eccentrically to the inner cylindrical bore in the area of these air connections, it can be achieved that on the one hand the wall thickness in the area of the air connections is sufficient for the "standard thread to be used, but on the other hand the wall thickness in the remaining area of the Housing is reduced, so that the total diameter of the housing for a given diameter of the cylindrical bore is smaller or the diameter of the cylindrical bore can be increased if the total diameter of the housing can remain unchanged compared to a corresponding known embodiment.
  • the outer wall surface of the housing is substantially cylindrical over its entire length.
  • the inner cylindrical bore then runs axially parallel, but asymmetrically or eccentrically to the outer cylinder wall.
  • the air connections preferably being arranged in the region of the greatest wall thickness of the housing.
  • the outer wall of the housing is also essentially cylindrical, but at the same time it is also concentric with the inner cylindrical bore, an eccentric annular extension being provided only at the axial height of the air connection or the air connections.
  • Such an embodiment is particularly useful when only a single side air connection in the area of the large bore diameter must be present, such as. B. in differential pressure piston vibrators.
  • the piston vibrator has an essentially constant, small wall thickness over the majority of its total length, while this wall is only thickened by an extra-annular attachment in the area of the air connection or the air connections.
  • this annular extension can be flush with the rest of the cylinder wall.
  • the first-mentioned embodiment is preferably intended for piston vibrators, the pistons of which have a constant diameter, and which generally has three lateral air connections
  • the second-mentioned embodiment is particularly useful for differential-pressure piston vibrators, the pistons of which are thickened in a longitudinal section and which are in the region of the larger bottom diameter only need a single side air connection.
  • the larger wall thickness required for the air connection is limited to a narrow, eccentrically annular extension, while the wall thickness of the housing is kept as small as possible.
  • piston with a substantially constant diameter and “corresponding bore” also include those embodiments in which the piston and / or the bore have one or more annular circumferential grooves for connection to air supply or discharge bores.
  • the housing of the piston vibrator consists of a wall 1, a cover 3 and a bottom 4.
  • a piston 2 that slides axially in the bore 5 is provided, which in turn has transverse and longitudinal bores and annular grooves for connecting the spaces above and below the piston 2 with corresponding air connections.
  • the wall 1 of the vibrator housing on the left in FIG. 1 a has a significantly smaller wall thickness than on the opposite side, on which three air connections 7 are arranged one behind the other in the axial direction. This different wall thickness results from the eccentric arrangement of the cylindrical bore 5 with respect to the likewise cylindrical outer wall surface 6 of the housing, as can also be seen from FIGS. 1 b and 1 c.
  • FIG. 1 b is a sectional view along the lines AA in FIG. 1, while FIG. 1 c shows a view of the piston vibrator from above.
  • Lid 3 and bottom 4 are fixed in widenings of the cylindrical bore 5, for example by screwing, soldering, gluing or welding.
  • the piston vibrator shown in FIG. 1 has a 15% smaller diameter.
  • the advantages of this embodiment of the invention become even clearer.
  • the bore of a conventional piston vibrator would have to be approximately 19% smaller in diameter than the one shown in FIG. 1, as a result of which the performance would decrease by approximately 35%.
  • FIG. 2 represents a differential pressure piston vibrator.
  • the cylindrical bore 5 of this vibrator is widened in steps and the piston 2 also has a corresponding step shape in longitudinal section, with a piston section of larger diameter in the cylindrical extension 5 'and the remaining piston part sliding in the cylindrical bore 5.
  • FIG. 1 c is a sectional view along the lines B - B at the level of the air connection 7 in FIG. 1 a.
  • the lateral connection 7 can generally also be formed by a laterally extending blind hole with an axially parallel connection bore through the wall of the housing, which likewise requires a certain minimum wall thickness.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Actuator (AREA)
EP19900108347 1989-05-13 1990-05-03 Vibrateur compact à piston Withdrawn EP0398078A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3915773A DE3915773A1 (de) 1989-05-13 1989-05-13 Kompakter kolbenvibrator
DE3915773 1989-05-13

Publications (2)

Publication Number Publication Date
EP0398078A2 true EP0398078A2 (fr) 1990-11-22
EP0398078A3 EP0398078A3 (fr) 1991-09-04

Family

ID=6380669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900108347 Withdrawn EP0398078A3 (fr) 1989-05-13 1990-05-03 Vibrateur compact à piston

Country Status (5)

Country Link
US (1) US5095809A (fr)
EP (1) EP0398078A3 (fr)
JP (1) JPH02307577A (fr)
DD (1) DD294197A5 (fr)
DE (1) DE3915773A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5833205A (en) * 1996-01-18 1998-11-10 Martin Engineering Company Vibrator mounting arrangement
US5772128A (en) * 1996-05-17 1998-06-30 Csi Technology, Inc. System for acoustically detecting and/or removing jams of flowable material in a chute, and air hammer for performing the removal
DE19908073B9 (de) * 1999-02-25 2009-02-26 Netter Gmbh Rollenvibrator
US20040232293A1 (en) * 2003-05-19 2004-11-25 Lindbeck Michael J. Vibrator mounting arrangement having a removable locking member
DE502005009362D1 (de) * 2005-05-30 2010-05-20 Klemm Bohrtechnik Gmbh Schwingungserzeuger mit einem zwischen Druckkammern verschiebbar gelagerten Arbeitskolben
US7530301B2 (en) * 2006-12-12 2009-05-12 Dynamic Air Inc Self starting vibrator
US9068484B2 (en) 2013-03-11 2015-06-30 Lawrence Livermore National Security, Llc Double-reed exhaust valve engine
US9499085B2 (en) 2013-06-25 2016-11-22 Martin Engineering Company Vibratory apparatus

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US763502A (en) * 1904-01-04 1904-06-28 Sidney Lea Mccain Valve-gear.
US795970A (en) * 1904-05-14 1905-08-01 J W Paxson Company Vibrator for molding-machines.
FR898967A (fr) * 1943-06-19 1945-05-14 Perfectionnements aux vibrateurs, vibreurs ou appareils analogues à air comprimé
US2580747A (en) * 1948-05-19 1952-01-01 Le Roi Company Valve for rock drills
US2987046A (en) * 1958-06-06 1961-06-06 Blackhawk Mfg Co Ram assemblage
US3376790A (en) * 1966-12-27 1968-04-09 Vibrator Mfg Co Piston vibrator
US4191093A (en) * 1977-09-19 1980-03-04 Compton Marshall F Concrete strike-off vibrator
AT366804B (de) * 1979-02-12 1982-05-10 Hoerbiger Ventilwerke Ag Gehaeuse fuer pneumatische oder hydraulische geraete
JPS5879572A (ja) * 1980-11-17 1983-05-13 岡本機工株式会社 振動発生装置

Also Published As

Publication number Publication date
EP0398078A3 (fr) 1991-09-04
DD294197A5 (de) 1991-09-26
DE3915773A1 (de) 1990-11-15
JPH02307577A (ja) 1990-12-20
US5095809A (en) 1992-03-17

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