EP0933529A2 - Internal gear pump with empty crescent space - Google Patents

Internal gear pump with empty crescent space Download PDF

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Publication number
EP0933529A2
EP0933529A2 EP98120950A EP98120950A EP0933529A2 EP 0933529 A2 EP0933529 A2 EP 0933529A2 EP 98120950 A EP98120950 A EP 98120950A EP 98120950 A EP98120950 A EP 98120950A EP 0933529 A2 EP0933529 A2 EP 0933529A2
Authority
EP
European Patent Office
Prior art keywords
ring gear
teeth
pinion
internal gear
gear pump
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Withdrawn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
EP98120950A
Other languages
German (de)
French (fr)
Other versions
EP0933529A3 (en
Inventor
Franz Arbogast
Peter Peiz
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.)
Voith Turbo GmbH and Co KG
Original Assignee
Voith Turbo GmbH and Co KG
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 Voith Turbo GmbH and Co KG filed Critical Voith Turbo GmbH and Co KG
Publication of EP0933529A2 publication Critical patent/EP0933529A2/en
Publication of EP0933529A3 publication Critical patent/EP0933529A3/en
Withdrawn legal-status Critical Current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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0007—Radial sealings for working fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels
    • 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
    • Y10T74/19—Gearing
    • Y10T74/19949—Teeth
    • Y10T74/19963—Spur
    • Y10T74/19972—Spur form

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Meat, Egg Or Seafood Products (AREA)

Abstract

The hollow wheel (1) has radial breakthroughs (1.1), which produce a conductive connection between the tooth base and the cover surface of the hollow wheel. Between the supporting flanks of the teeth (1.3) of the hollow wheel or the teeth (2.2) of the pinion and the radial holes of the hollow wheel conductive connections are produced. The conductive connections consist of grooves, which extend over a part of the length of the flanks, or over the complete flank length of the teeth. Several grooves are provided in each flank axially next to one another.

Description

Die Erfindung betrifft eine sichellose Innenzahnradpumpe, so wie beispielsweise in EP 0 607 497 B1 beschrieben.The invention relates to a sickle-free internal gear pump, such as described for example in EP 0 607 497 B1.

Solche Pumpen weisen als wesentliche Elemente ein außenverzahntes Ritzel auf, ein innenverzahntes Hohlrad, das mit dem Ritzel kämmt sowie ein Gehäuse, das einen Sauganschluß und einen Druckanschluß aufweist und das die beiden genannten Verzahnungselemente aufnimmt.Such pumps have an externally toothed pinion as essential elements on, an internally toothed ring gear that meshes with the pinion and a Housing having a suction port and a pressure port and that accommodates the two gear elements mentioned.

Das Hohlrad weist radiale Bohrungen auf. Diese stellen jeweils eine leitende Verbindung zwischen dem betreffenden Zahngrund des Hohlrades und dessen äußerer Umgebung her. Sie dienen dazu, Medium im Bereich des Sauganschlusses durch das Hohlrad hindurch in den Zwischenraum zwischen Hohlrad und Ritzel eintreten zu lassen, und im Bereich des Druckanschlusses aus dem genannten Zwischenraum durch das Hohlrad hindurch zum Druckanschluß hin.The ring gear has radial bores. These each provide a managerial staff Connection between the relevant tooth base of the ring gear and its outer environment. They serve to serve in the field of Suction port through the ring gear into the space between Allow ring gear and pinion to enter, and in the area of the pressure connection from said space through the ring gear to Pressure connection.

An solche Innenzahnradpumpen werden verschiedene Anforderungen gestellt. So soll die Abdichtung zwischen den Zähnen des Hohlrades und den Zähnen des Ritzels im Bereich des Druckaufbaus möglichst perfekt sein. Der Verschleiß soll gering sein. Die Pumpe soll in reproduzierbarer Weise arbeiten, so daß sie auch über längere Zeiträume hinweg bei bestimmten Drehzahlen stets dasselbe Quantum an Medium bei demselben Druck fördert. Schließlich soll die Pumpe kostengünstig herstellbar sein.Various requirements are placed on such internal gear pumps. So is the seal between the teeth of the ring gear and the teeth of the pinion in the area of the pressure build-up should be as perfect as possible. Of the Wear should be low. The pump is said to be reproducible work, so that they also work for certain periods of time Speeds always promote the same quantity of medium at the same pressure. Finally, the pump should be inexpensive to manufacture.

Es hat sich gezeigt, daß die Abdichtung zwischen den Zähnen im Bereich des Druckabbaus nicht immer optimal ist, so daß die Förderleistung über längere Zeiträume hinweg schwankt. It has been shown that the seal between the teeth in the area of Pressure reduction is not always optimal, so that the output over longer Fluctuates over time.

Der Erfindung liegt die Aufgabe zugrunde, eine sichellose Innenzahnradpumpe anzugeben, die in jeder Beziehung eine optimale Arbeitsleistung erbringt, einfach im Aufbau ist und einen geringen Verschleiß aufweist.The invention has for its object a sickle Internal gear pump specify which is optimal in every respect Performs work, is simple in construction and low wear having.

Die Erfinder haben erkannt, daß im Bereich der tragenden Flanken der Verzahnung Ölquetschungen auftreten können. Diese können in erheblichem Maß den Wirkungsgrad beeinträchtigen. Um diese Ölquetschungen aufzuheben, werden gemäß der Erfindung leitende Verbindungen zwischen den betreffenden Räumen und den betreffenden Axialbohrungen im Hohlrad vorgesehen.The inventors have recognized that in the area of the load-bearing flanks Interlocking oil crushing can occur. These can be significant Measure affect efficiency. To those bruises according to the invention, conductive connections between the relevant rooms and the relevant axial bores in the ring gear intended.

Diese Aufgabe wird durch die Merkmale von Anspruch 1 gelöst.This object is solved by the features of claim 1.

Die Erfindung ist anhand der Zeichnung näher erläutert. Darin ist im einzelnen folgendes dargestellt:

Fig. 1
zeigt eine sichellose Innenzahnradpumpe in einem Axialschnitt.
Fig. 2
zeigt die Innenzahnradpumpe gemäß Fig. 1 in einer ersten Ausführungsform.
The invention is explained in more detail with reference to the drawing. The following is shown in detail:
Fig. 1
shows a crescentless internal gear pump in an axial section.
Fig. 2
shows the internal gear pump according to FIG. 1 in a first embodiment.

Die in Fig. 1 gezeigte Innenzahnradpumpe ist eine sichellose, kopfdichtende. Sie umfaßt als wesentliche Elemente ein Hohlrad 1, ein Ritzel 2 sowie ein Gehäuse 3. Das Hohlrad 1 ist mit Bohrungen 1.1 versehen. Diese stellen eine leitende Verbindung zwischen der Umgebung des Hohlrades 1 einerseits und dem Zwischenraum zwischen Hohlrad 1 und Ritzel 2 andererseits her. In die Zähne des Hohlrades sind jeweils Dichtelemente 1.2 eingesetzt.The internal gear pump shown in Fig. 1 is a sickle-less, head-sealing. It comprises a ring gear 1, a pinion 2 and a as essential elements Housing 3. The ring gear 1 is provided with holes 1.1. These represent one conductive connection between the surroundings of the ring gear 1 on the one hand and the space between the ring gear 1 and pinion 2 on the other hand ago. In the Teeth of the ring gear are each sealing elements 1.2 used.

Ritzel 2 ist auf einer Ritzelwelle 2.1 aufgekeilt, die in Richtung des Pfeiles X umläuft. Pinion 2 is wedged on a pinion shaft 2.1, which in the direction of arrow X circulates.

Das Gehäuse 3 weist einen Sauganschluß 3.1 und einen Druckanschluß 3.2 auf.The housing 3 has a suction port 3.1 and a pressure port 3.2 on.

Die Zähne 1.3 des Hohlrades und die Zähne 2.2 des Ritzels haben eine axiale Breite, die größer ist als der Wälzkreisdurchmesser des Ritzels 2. Hohlrad 1 und Ritzel 2 sind exzentrisch zueinander gelagert. Außerdem ist die Zahl der Zähne 2.2 des Ritzels 2 um eins kleiner als die Zahl der Zähne 1.3 des Hohlrades 1.The teeth 1.3 of the ring gear and the teeth 2.2 of the pinion have an axial Width that is larger than the pitch circle diameter of the pinion 2. Ring gear 1 and pinion 2 are mounted eccentrically to each other. In addition, the number of Teeth 2.2 of the pinion 2 one less than the number of teeth 1.3 of the Ring gear 1.

Die in Fig. 2 dargestellte Ausführungsform zeigt die Verhältnisse im Bereich des Druckabbaus vor und nach dem Totpunkt Z. Man erkennt wiederum die Zähne 1.3 des Hohlrades und die Zähne 2.2 des Ritzels, ferner die Verbindungsbohrungen 1.1 im Hohlrad sowie die Dichtelemente 1.2 in den Köpfen der Hohlradzähne 1.3.The embodiment shown in Fig. 2 shows the situation in the area of the pressure reduction before and after the dead center Z. Again one recognizes the Teeth 1.3 of the ring gear and teeth 2.2 of the pinion, also the Connection bores 1.1 in the ring gear and the sealing elements 1.2 in the Heading the ring gear teeth 1.3.

Die Erfinder haben folgendes erkannt: Im Zwischenraum C im Bereich des Kopfes eines jeden Hohlrad-Zahnes 1.3 und eines jeden Zahnfußes des Ritzels 2 kann es zu einer Ölquetschung führen. Diese Ölquetschung findet statt im Bereich zwischen den Punkten A und B. Punkt A liegt auf der Eingriffsstrecke Y, und Punkt B liegt an einer Kontaktstelle zwischen Dichtelement 1.2 und dem Fuß der Ritzelzähne 2.2. Um hier eine Entlastung zu schaffen, werden gemäß der Erfindung Nuten vorgesehen, und zwar entweder Nuten 1.4 in den Flanken der Zähne 1.3 des Hohlrades, oder Nuten 2.3 in den Flanken der Ritzelzähne 2.2. Die Nuten führen zu einer Entlastung des genannten Raumes. Sie stellen eine leitende Verbindung zwischen dem betreffenden Raum C und der betreffenden Radialbohrung 1.1 im Hohlrad 1 her.The inventors recognized the following: In the space C in the area of Head of each ring gear tooth 1.3 and each tooth base of the Pinion 2 can cause an oil squeeze. This oil squeeze takes place instead of in the area between points A and B. Point A lies on the Intervention distance Y, and point B lies at a contact point between Sealing element 1.2 and the foot of the pinion teeth 2.2. A relief here to provide grooves are provided according to the invention, namely either grooves 1.4 in the flanks of the teeth 1.3 of the ring gear, or grooves 2.3 in the flanks of the pinion teeth 2.2. The grooves lead to relief of the room mentioned. You make a conductive connection between the the relevant space C and the relevant radial bore 1.1 in the ring gear 1 forth.

Ist die axiale Erstreckung der Zähne 1.3 und 2.2 gering, so genügt es, die Zahnflanken im Bereich der Stirnseiten anzufasen, statt Nuten vorzusehen.If the axial extension of the teeth 1.3 and 2.2 is small, it is sufficient that Chamfer tooth flanks in the area of the end faces instead of providing grooves.

Claims (6)

Sichellose Innenzahnradpumpe; 1.1 mit einem innenverzahnten Hohlrad (1); 1.2 mit einem Ritzel (2), das mit dem Hohlrad (1) kämmt; 1.3 Ritzel (2) und Hohlrad (1) sind in einem Gehäuse (3) drehbar gelagert, das einen Sauganschluß (3.1) und einen Druckanschluß (3.2) aufweist; 1.4 das Hohlrad (1) weist radiale Durchbrüche (1.1) auf, die jeweils eine leitende Verbindung zwischen dem Zahngrund und der Mantelfläche des Hohlrades (1) herstellen; 1.5 zwischen den tragenden Flanken der Zähne (1.3) des Hohlrades (1) oder der Zähne (2.2) des Ritzels (2) und den Radialbohrungen des Hohlrades (1) sind leitende Verbindungen (1.4, 2.3) hergestellt. Crescentless internal gear pump; 1.1 with an internally toothed ring gear (1); 1.2 with a pinion (2) which meshes with the ring gear (1); 1.3 pinion (2) and ring gear (1) are rotatably mounted in a housing (3) which has a suction connection (3.1) and a pressure connection (3.2); 1.4 the ring gear (1) has radial openings (1.1), which each produce a conductive connection between the tooth base and the outer surface of the ring gear (1); 1.5 between the supporting flanks of the teeth (1.3) of the ring gear (1) or the teeth (2.2) of the pinion (2) and the radial bores of the ring gear (1) conductive connections (1.4, 2.3) are made. Innenzahnradpumpe nach Anspruch 1, dadurch gekennzeichnet, daß die leitenden Verbindungen (1.4, 2.3) sowohl in den tragenden Flanken der Zähne (1.3) des Hohlrades (1) als auch in den tragenden Flanken der Zähne (2.2) des Ritzels (2) vorgesehen sind.Internal gear pump according to claim 1, characterized in that the conductive connections (1.4, 2.3) both in the load-bearing flanks the teeth (1.3) of the ring gear (1) as well as in the supporting flanks the teeth (2.2) of the pinion (2) are provided. Innenzahnradpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die leitenden Verbindungen aus Nuten (1.4, 2.3) bestehen, die sich wenigstens über einen Teil der Länge der betreffenden Flanken erstrecken.Internal gear pump according to claim 1 or 2, characterized characterized in that the conductive connections from grooves (1.4, 2.3) consist of at least part of the length of the flanks in question. Innenzahnradpumpe nach Anspruch 3, dadurch gekennzeichnet, daß sich die Nuten (1.4, 2.3) über die gesamte Flankenlänge der betreffenden Zähne erstrecken.Internal gear pump according to claim 3, characterized in that the grooves (1.4, 2.3) over the entire flank length of the teeth in question. Innenzahnradpumpe nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß mehrere Nuten (1.4, 2.3) in jeder Flanke axial nebeneinander liegend vorgesehen sind. Internal gear pump according to claim 3 or 4, characterized characterized in that several grooves (1.4, 2.3) axially in each flank are provided side by side. Innenzahnradpumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß zur Herstellung leitender Verbindungen im Randbereich der Zahnflanken Anfasungen vorgesehen sind.Internal gear pump according to one of claims 1 to 5, characterized characterized in that for the production of conductive connections in Edge areas of the tooth flanks are chamfered.
EP98120950A 1998-02-03 1998-11-05 Internal gear pump with empty crescent space Withdrawn EP0933529A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19804133 1998-02-03
DE19804133A DE19804133A1 (en) 1998-02-03 1998-02-03 Sickle-free internal gear pump

Publications (2)

Publication Number Publication Date
EP0933529A2 true EP0933529A2 (en) 1999-08-04
EP0933529A3 EP0933529A3 (en) 2000-06-07

Family

ID=7856472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98120950A Withdrawn EP0933529A3 (en) 1998-02-03 1998-11-05 Internal gear pump with empty crescent space

Country Status (5)

Country Link
US (1) US6164943A (en)
EP (1) EP0933529A3 (en)
JP (1) JPH11257246A (en)
KR (1) KR19990072376A (en)
DE (1) DE19804133A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
UA119134C2 (en) 2012-08-08 2019-05-10 Аарон Фьюстел Rotary expansible chamber devices having adjustable working-fluid ports, and systems incorporating the same
WO2015160979A1 (en) 2014-04-15 2015-10-22 Thoratec Corporation Catheter pump with access ports
KR101726374B1 (en) * 2015-09-09 2017-04-12 한전케이디엔주식회사 Method and apparatus for recognizing battery

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0607497B1 (en) 1993-01-18 1996-06-12 J.M. Voith GmbH Internal gear pump with sealings incorporated in the teeth

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
US1993721A (en) * 1934-01-11 1935-03-05 Gulf Res & Dev Corp Packing
US2669904A (en) * 1948-03-01 1954-02-23 Fellows Gear Shaper Co Method of generating face and tapered gears with bowed formation
US2845031A (en) * 1953-01-13 1958-07-29 Francis W Guibert Gear tooth construction for rotary fluid meters
US2925044A (en) * 1956-03-22 1960-02-16 Robert W Brundage Hydraulic pump or motor
DE3417824A1 (en) * 1984-05-14 1985-11-14 Rudolf Prof. Dr.-Ing. Röper Gear pairs for rotary piston machines
US4813858A (en) * 1986-05-20 1989-03-21 Mannesmann Rexroth Gmbh Gerotor pump with pressure valve and suction opening for each pressure chamber
ES2022841B3 (en) * 1986-07-19 1991-12-16 Barmag Barmer Maschf INTERIOR GEAR WHEEL PUMP.
EP0315878B1 (en) * 1987-11-07 1992-04-01 Barmag Ag Internal gear pump
JP3194044B2 (en) * 1993-09-30 2001-07-30 スズキ株式会社 Oil pump structure
NL9401735A (en) * 1994-10-19 1996-06-03 Crown Gear Bv Gear transmission of a cylindrical pinion with a crown wheel, the crown wheel used in this gear transmission, a method according to which the crown wheel can be made and a tool with which the crown wheel can be made.
JPH0914152A (en) * 1995-06-30 1997-01-14 Jatco Corp Internal gear type rotary pump
US5890885A (en) * 1995-09-01 1999-04-06 Eckerle; Otto Filling member-less internal-gear pump having a sealed running ring
DE19651683A1 (en) * 1996-12-12 1998-06-18 Otto Eckerle Internal gear pump without filler

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0607497B1 (en) 1993-01-18 1996-06-12 J.M. Voith GmbH Internal gear pump with sealings incorporated in the teeth

Also Published As

Publication number Publication date
JPH11257246A (en) 1999-09-21
KR19990072376A (en) 1999-09-27
US6164943A (en) 2000-12-26
EP0933529A3 (en) 2000-06-07
DE19804133A1 (en) 1999-08-12

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