EP1156185B1 - Multiple crank drive for power machines , especially for membrane pumps - Google Patents

Multiple crank drive for power machines , especially for membrane pumps Download PDF

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Publication number
EP1156185B1
EP1156185B1 EP01110889A EP01110889A EP1156185B1 EP 1156185 B1 EP1156185 B1 EP 1156185B1 EP 01110889 A EP01110889 A EP 01110889A EP 01110889 A EP01110889 A EP 01110889A EP 1156185 B1 EP1156185 B1 EP 1156185B1
Authority
EP
European Patent Office
Prior art keywords
crankshaft
drive
crank mechanism
housing
multiple crank
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
EP01110889A
Other languages
German (de)
French (fr)
Other versions
EP1156185A2 (en
EP1156185A3 (en
Inventor
Nils Dr. Kohlhase
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.)
Lewa GmbH
Original Assignee
Lewa 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 Lewa GmbH filed Critical Lewa GmbH
Publication of EP1156185A2 publication Critical patent/EP1156185A2/en
Publication of EP1156185A3 publication Critical patent/EP1156185A3/en
Application granted granted Critical
Publication of EP1156185B1 publication Critical patent/EP1156185B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/006—Crankshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • 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
    • Y10T74/18208—Crank, pitman, and slide
    • 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
    • Y10T74/18248—Crank and slide
    • 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
    • Y10T74/2173—Cranks and wrist pins
    • 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
    • Y10T74/2173—Cranks and wrist pins
    • Y10T74/2174—Multiple throw

Definitions

  • the invention relates to a triplex diaphragm pump with a multiple crank drive according to the preamble of claim 1.
  • crank drives of the generic type which are used for driving three juxtaposed, interconnected diaphragm pumps, so-called.
  • Triplexmembranpumpen the arrangement is usually made such that a common crankshaft is provided, on which at a distance from each other, the individual crank mechanisms, usually consisting of eccentric, connecting rod, connecting rod, etc., are arranged.
  • This crankshaft which inevitably has a not inconsiderable length due to the juxtaposed diaphragm pumps, is mounted at its two ends by means of a respective bearing point in a housing. Because of this necessarily greater length of the crankshaft, it must also be relatively strong, i. with a sufficiently large diameter, be formed. In addition, there is a considerable bearing stress, which accordingly also requires correspondingly large-sized bearings.
  • crankshaft in particular a worm gear
  • the drive for the crankshaft is also arranged on the crankshaft and is usually located in the interior of the housing near the one end bearing of the crankshaft.
  • the invention has for its object to eliminate the disadvantages described the multiple crank drive of the generic type such that the crankshaft can be built shorter and provided with a smaller diameter and finally causes only a lower bearing stress.
  • the invention is based on the essential idea of supporting the crankshaft serving to drive a triplex membrane pump in the housing in a flying manner.
  • the bearings of the multiple crank drive are located exclusively on both sides of the central crank mechanism, and the drive for the multiple crank drive is located between a crank mechanism and a bearing point.
  • crankshaft requires no end, previously serving the bearing pin more, so that the crankshaft can be made shorter overall and thus can be provided with a smaller diameter. This also results in the significant advantage of a lower bearing stress, so that even smaller sized bearings can be provided.
  • crankshaft which previously had a length of 2.10 m, can be built with a length of 1.50 m.
  • a multiple crank drive is provided for driving a triple diaphragm pump.
  • This has a crankshaft 1, which is arranged in a housing 2.
  • the crankshaft 1 serves to drive three diaphragm pumps arranged next to one another and is accordingly provided with three individual crank drives 3, 4, 5. These each have a connecting rod 6, 7, 8, hinged on the one hand to an eccentric disk 9 or 10 or 11 fastened to the crankshaft 1 and, on the other hand, to a connecting rod head 15, 16, 17 displaceable in a cylindrical guide 12, 13, 14 is.
  • the crankshaft 1 is cantilevered in the housing 2.
  • the two bearing points 22, 23 of the crankshaft 1 which are otherwise arranged at the respective end of the crankshaft 1 and fixed in the lateral end walls of the housing, exclusively on both sides of the central crank mechanism 4, wherein the attachment of these two bearings 22, 23 ,
  • the diameter of the crankshaft can be kept correspondingly smaller, which also reduces the total stress on the bearings 22, 23.
  • the drive 24 for the crankshaft 1, which is provided in the illustrated embodiment in the form of a transmission and is usually located on the inside of one of the two end walls of the housing 2 is between two crank gears, in the specific embodiment between the middle crank mechanism 4 and the adjacent thereto left crank mechanism 3, arranged, close to the bearing 22nd

Description

Die Erfindung betrifft eine Triplexmembranpumpe mit einem Mehrfachkurbeltrieb gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a triplex diaphragm pump with a multiple crank drive according to the preamble of claim 1.

Bei bekannten Mehrfachkurbeltrieben der gattungsgemäßen Art, die zum Antrieb für drei nebeneinander angeordnete, miteinander verbundene Membranpumpen, sog. Triplexmembranpumpen, zur Anwendung gelangen, ist die Anordnung üblicherweise derart getroffen, daß eine gemeinsame Kurbelwelle vorgesehen ist, auf welcher im Abstand voneinander die einzelnen Kurbeltriebe, üblicherweise bestehend aus Exzenter, Pleuel, Pleuelkopf usw., angeordnet sind. Diese Kurbelwelle, die aufgrund der nebeneinander angeordneten Membranpumpen zwangsläufig eine nicht unbeträchtliche Länge aufweist, ist an ihren beiden Enden mittels jeweils einer Lagerstelle in einem Gehäuse gelagert. Aufgrund dieser zwangsläufig größeren Länge der Kurbelwelle muß diese auch relativ stark, d.h. mit ausreichend großem Durchmesser, ausgebildet sein. Darüber hinaus ergibt sich eine beträchtliche Lagerbeanspruchung, die demgemäß auch entsprechend groß dimensionierte Lager erfordert.In known multiple crank drives of the generic type, which are used for driving three juxtaposed, interconnected diaphragm pumps, so-called. Triplexmembranpumpen, the arrangement is usually made such that a common crankshaft is provided, on which at a distance from each other, the individual crank mechanisms, usually consisting of eccentric, connecting rod, connecting rod, etc., are arranged. This crankshaft, which inevitably has a not inconsiderable length due to the juxtaposed diaphragm pumps, is mounted at its two ends by means of a respective bearing point in a housing. Because of this necessarily greater length of the crankshaft, it must also be relatively strong, i. with a sufficiently large diameter, be formed. In addition, there is a considerable bearing stress, which accordingly also requires correspondingly large-sized bearings.

Diese Beanspruchung wird auch noch dadurch vergrößert, daß der Antrieb für die Kurbelwelle, insbesondere ein Schneckengetriebe, gleichfalls auf der Kurbelwelle angeordnet ist und sich üblicherweise im Innern des Gehäuses nahe der einen endseitigen Lagerstelle der Kurbelwelle befindet.This stress is also increased by the fact that the drive for the crankshaft, in particular a worm gear, is also arranged on the crankshaft and is usually located in the interior of the housing near the one end bearing of the crankshaft.

Aus der US-A 2 284 645 ist eine Kolbenpumpe in Form einer Luftpumpe bzw. eines Kompressors bekannt, wobei zwei Einheiten anzutreiben sind. Die Antriebswelle ist beidseitig eines mittigen Antriebes gelagert.From US-A 2 284 645 a piston pump in the form of an air pump or a compressor is known, wherein two units are to be driven. The drive shaft is mounted on both sides of a central drive.

Der Erfindung liegt die Aufgabe zugrunde, zur Beseitigung der geschilderten Nachteile den Mehrfachkurbeltrieb der gattungsgemäßen Art derart auszugestalten, daß die Kurbelwelle kürzer gebaut und mit einem geringeren Durchmesser versehen werden kann sowie schließlich auch nur eine geringere Lagerbeanspruchung verursacht.The invention has for its object to eliminate the disadvantages described the multiple crank drive of the generic type such that the crankshaft can be built shorter and provided with a smaller diameter and finally causes only a lower bearing stress.

Die Merkmale der zur Lösung dieser Aufgabe geschaffenen Erfindung ergeben sich aus Anspruch 1. Eine vorteilhafte Ausgestaltung hiervon ist in Anspruch 2 beschrieben.The features of the invention to solve this problem emerge from claim 1. An advantageous embodiment thereof is described in claim 2.

Der Erfindung liegt der wesentliche Gedanke zugrunde, die zum Antrieb einer Triplexmembranpumpe dienende Kurbelwelle fliegend im Gehäuse zu lagern. Die Lagerstellen des Mehrfachkurbeltriebs befinden sich ausschließlich beidseits des mittleren Kurbeltriebs, und der Antrieb für den Mehrfachkurbeltrieb befindet sich zwischen einem Kurbeltrieb und einer Lagerstelle.The invention is based on the essential idea of supporting the crankshaft serving to drive a triplex membrane pump in the housing in a flying manner. The bearings of the multiple crank drive are located exclusively on both sides of the central crank mechanism, and the drive for the multiple crank drive is located between a crank mechanism and a bearing point.

Aus diesem Grund benötigt die Kurbelwelle keine endseitigen, bisher der Lagerung dienenden Zapfen mehr, so daß die Kurbelwelle insgesamt kürzer gebaut und damit auch mit einem kleineren Durchmesser versehen werden kann. Hierdurch ergibt sich auch der wesentliche Vorteil einer geringeren Lagerbeanspruchung, so daß auch kleiner dimensionierte Lager vorgesehen werden können.For this reason, the crankshaft requires no end, previously serving the bearing pin more, so that the crankshaft can be made shorter overall and thus can be provided with a smaller diameter. This also results in the significant advantage of a lower bearing stress, so that even smaller sized bearings can be provided.

In einem praktischen Anwendungsbeispiel bedeutet dies, daß bei ansonsten gleicher Anordnung eine Kurbelwelle, die bisher eine Länge von 2,10 m aufwies, mit einer Länge von 1,50 m gebaut werden kann.In a practical application example, this means that, with otherwise identical arrangement, a crankshaft, which previously had a length of 2.10 m, can be built with a length of 1.50 m.

Insgesamt werden somit durch die Erfindung nicht unbeträchtliche bauliche Vorteile erzielt, die sich nicht zuletzt vorteilhaft auf die Preisgestaltung der gesamten Anordnung auswirken.Overall, not inconsiderable structural advantages are thus achieved by the invention, which not least beneficial effect on the pricing of the entire arrangement.

Die Erfindung wird im folgenden in Form eines Ausführungsbeispiels anhand der einzigen Zeichnung näher erläutert. Diese zeigt im Längsschnitt einen Mehrfachkurbeltrieb gemäß der Erfindung.The invention is explained in more detail below in the form of an embodiment with reference to the single drawing. This shows in longitudinal section a multiple crank drive according to the invention.

Wie aus der Zeichnung ersichtlich, ist zum Antrieb einer Dreifachmembranpumpe ein Mehrfachkurbeltrieb vorgesehen. Dieser weist eine Kurbelwelle 1 auf, die in einem Gehäuse 2 angeordnet ist.As can be seen from the drawing, a multiple crank drive is provided for driving a triple diaphragm pump. This has a crankshaft 1, which is arranged in a housing 2.

Die Kurbelwelle 1 dient zum Antrieb von drei nebeneinander angeordneten Membranpumpen und ist demgemäß mit drei einzelnen Kurbeltrieben 3, 4, 5 versehen. Diese weisen jeweils ein Pleuel 6, 7, 8 auf, das einerseits an einer an der Kurbelwelle 1 befestigten Exzenterscheibe 9 bzw. 10 bzw. 11 und andererseits an einem in einer zylindrischen Führung 12, 13, 14 verschiebbaren Pleuelkopf 15, 16, 17 angelenkt ist.The crankshaft 1 serves to drive three diaphragm pumps arranged next to one another and is accordingly provided with three individual crank drives 3, 4, 5. These each have a connecting rod 6, 7, 8, hinged on the one hand to an eccentric disk 9 or 10 or 11 fastened to the crankshaft 1 and, on the other hand, to a connecting rod head 15, 16, 17 displaceable in a cylindrical guide 12, 13, 14 is.

An den Pleuelköpfen 15, 16, 17 ist jeweils eine Kolbenstange 18, 19, 20 angelenkt, die aufgrund der von der Kurbelwelle 1 ausgeübten Wirkung in Richtung der Doppelpfeile 21 hin- und herbewegbar ist und somit die angeschlossenen Membranpumpen antreibt.At the Pleuelköpfen 15, 16, 17 is in each case a piston rod 18, 19, 20 hinged, which is due to the force exerted by the crankshaft 1 effect in the direction of the double arrows 21 back and forth and thus drives the connected diaphragm pumps.

Wie deutlich aus der Zeichnung ersichtlich, ist die Kurbelwelle 1 fliegend im Gehäuse 2 gelagert. Zu diesem Zweck befinden sich die beiden Lagerstellen 22, 23 der Kurbelwelle 1, die ansonsten am jeweiligen Ende der Kurbelwelle 1 angeordnet und in den seitlichen Stirnwänden des Gehäuses festgelegt sind, ausschließlich beidseits des mittleren Kurbeltriebs 4, wobei die Befestigung dieser beiden Lagerstellen 22, 23, wie aus der Zeichnung ersichtlich, beim dargestellten Ausführungsbeispiel am Boden des Gehäuses 2 erfolgt. Hierdurch ist es möglich, die Kurbelwelle 1 erheblich kürzer zu bauen, da nicht mehr endseitige Kurbelwellenzapfen zur Lagerung in den seitlichen Stirnwänden des Gehäuses 2 vorgesehen werden müssen. Gleichzeitig kann der Durchmesser der Kurbelwelle entsprechend kleiner gehalten werden, was insgesamt auch die Beanspruchung der Lager 22, 23 verringert.As can be seen clearly from the drawing, the crankshaft 1 is cantilevered in the housing 2. For this purpose, the two bearing points 22, 23 of the crankshaft 1, which are otherwise arranged at the respective end of the crankshaft 1 and fixed in the lateral end walls of the housing, exclusively on both sides of the central crank mechanism 4, wherein the attachment of these two bearings 22, 23 , As can be seen from the drawing, takes place in the illustrated embodiment at the bottom of the housing 2. This makes it possible to build the crankshaft 1 considerably shorter, since no more end crankshaft journals for storage in the side end walls of the housing 2 must be provided. At the same time, the diameter of the crankshaft can be kept correspondingly smaller, which also reduces the total stress on the bearings 22, 23.

Der Antrieb 24 für die Kurbelwelle 1, der beim dargestellten Ausführungsbeispiel in Form eines Getriebes vorgesehen ist und sich üblicherweise an der Innenseite einer der beiden Stirnwände des Gehäuses 2 befindet, ist zwischen zwei Kurbeltrieben, im konkreten Ausführungsbeispiel zwischen dem mittleren Kurbeltrieb 4 und dem hierzu benachbarten linken Kurbeltrieb 3, angeordnet, und zwar nahe der Lagerstelle 22.The drive 24 for the crankshaft 1, which is provided in the illustrated embodiment in the form of a transmission and is usually located on the inside of one of the two end walls of the housing 2 is between two crank gears, in the specific embodiment between the middle crank mechanism 4 and the adjacent thereto left crank mechanism 3, arranged, close to the bearing 22nd

Claims (2)

  1. Triplex diaphragm pump with a multiple crank mechanism, having a crankshaft (1) which is arranged in a housing (2) and which has at least two mounting sites (22, 23), which is drivable via a drive mechanism (24), in particular a gearbox, and in turn drives, in each case via a crank mechanism (3, 4, 5), one of a plurality of piston rods (18, 19, 20) of the triplex diaphragm pump, characterised in that the crankshaft (1) is mounted in floating manner in the housing (2), that the mounting sites (22, 23) are exclusively located on either side of the central crank mechanism (4) and that the drive (24) for the multiple crank mechanism is arranged such that it is situated between two crank mechanisms (4, 3 or 4, 5) and between one crank mechanism (3, 4, 5) and a mounting site (22, 23).
  2. Triplex diaphragm pump with a multiple crank mechanism according to claim 1, characterised in that the drive mechanism (24) is situated close to a mounting site (22 or 23).
EP01110889A 2000-05-18 2001-05-04 Multiple crank drive for power machines , especially for membrane pumps Expired - Lifetime EP1156185B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10024546A DE10024546B4 (en) 2000-05-18 2000-05-18 Multiple crank drive for triplex diaphragm pumps
DE10024546 2000-05-18

Publications (3)

Publication Number Publication Date
EP1156185A2 EP1156185A2 (en) 2001-11-21
EP1156185A3 EP1156185A3 (en) 2002-05-08
EP1156185B1 true EP1156185B1 (en) 2006-12-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP01110889A Expired - Lifetime EP1156185B1 (en) 2000-05-18 2001-05-04 Multiple crank drive for power machines , especially for membrane pumps

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US (1) US6598493B2 (en)
EP (1) EP1156185B1 (en)
DE (2) DE10024546B4 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050150537A1 (en) * 2004-01-13 2005-07-14 Nanocoolers Inc. Thermoelectric devices
CN102425537A (en) * 2011-12-14 2012-04-25 闫鹏 Diaphragm pump
CN106438269B (en) * 2016-09-30 2020-07-07 瑞立集团瑞安汽车零部件有限公司 Transmission mechanism of oil-free air compressor
CN106762598B (en) * 2016-12-07 2019-08-13 宁波合力机泵股份有限公司 A kind of power end of plunger pump
CN113958477B (en) * 2021-10-25 2023-04-07 台州市蒙花机械有限公司 Small-size large-stroke plunger pump

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1994397A (en) * 1933-03-23 1935-03-12 Loveridge Claude Warren Rotary engine
US2284645A (en) * 1941-01-27 1942-06-02 Duffy Charles Hugh Air pump or compressor
US3570459A (en) * 1969-04-17 1971-03-16 Bristol Associates Inc Two-stroke cycle engine
JPS5836221B2 (en) * 1978-04-06 1983-08-08 ユナイテツド スタ−リング ア−ベ− crankshaft device
JPH0799140B2 (en) * 1989-12-28 1995-10-25 株式会社丸山製作所 Multiple reciprocating pump
US5180346A (en) * 1991-07-22 1993-01-19 Ford Motor Company T-drive powertrain assembly for automotive vehicle with forward disposition of the axis for the forward traction wheels
US5158046A (en) * 1991-10-02 1992-10-27 Rucker Richard D Two-stroke cycle engine having linear gear drive
DE4443778A1 (en) * 1994-12-08 1996-06-20 Abel Gmbh & Co Double diaphragm pump
US6006619A (en) * 1998-04-09 1999-12-28 Gindentuller; Ilya Internal combustion engine with improved orbital crankshaft motion converter

Also Published As

Publication number Publication date
US6598493B2 (en) 2003-07-29
DE50111612D1 (en) 2007-01-25
US20010042422A1 (en) 2001-11-22
DE10024546B4 (en) 2004-07-15
EP1156185A2 (en) 2001-11-21
DE10024546A1 (en) 2001-11-29
EP1156185A3 (en) 2002-05-08

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