EP0833056B1 - Verfahren zur Wellenpositionierung und eine Zahnradpumpe - Google Patents
Verfahren zur Wellenpositionierung und eine Zahnradpumpe Download PDFInfo
- Publication number
- EP0833056B1 EP0833056B1 EP19970122713 EP97122713A EP0833056B1 EP 0833056 B1 EP0833056 B1 EP 0833056B1 EP 19970122713 EP19970122713 EP 19970122713 EP 97122713 A EP97122713 A EP 97122713A EP 0833056 B1 EP0833056 B1 EP 0833056B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gears
- gear
- housing
- inlet
- 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.)
- Expired - Lifetime
Links
Images
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
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/086—Carter
-
- 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
Definitions
- the present invention relates to a method according to The preamble of claim 1, a gear pump according to the preamble of claim 3 and a Manufacturing process according to the preamble of Patent claim 7.
- Gear pumps of the simplest type consist of a pair equally large, interlocking gears that enclosed on all sides by a housing.
- the Gears sit on two shafts mounted in the housing, of which - again in the simplest construction - one as Drive shaft out through a shaft seal to the outside is.
- the housing has both sides of the Gearing engagement per one opening for entry and exit of the conveyed medium.
- Gear pumps provide proven pressure build-up units high volumetric efficiency. Accordingly large are therefore also on the gears and thus on the forces acting on the gears carrying waves, which in known manner received by corresponding plain bearings Need to become.
- the plain bearings are from the pumped medium flows through and lubricated. According to storage theory comes it causes the waves in the camp to float when the Operating conditions are chosen correctly, bringing the Bearing load and the bearing capacity are in balance.
- a known gear pump is for example in the Document EP-0 753 678.
- gear pumps have the Disadvantage on that these gear pumps of the rheological and thermal limits of the pumped medium are dependent, i.e., that gear pumps due to the Pumped medium must be designed.
- the present invention is therefore the task based on specifying a method or a gear pump, where the above-mentioned disadvantages do not occur.
- the invention has the following advantages: Radial positioning of the gears via tooth tips and Inner sides of the housing bores is made is a decoupling of the operating conditions of the Achieved delivery medium properties, at least one any remaining dependency of the Operating conditions of the flow behavior of the pumped medium low. Accordingly, the manufacturing costs for Gear pump according to the invention can be considerably reduced.
- Fig. 1 shows as parts of a known gear pump Plain bearing GL with a bearing bore LB, in which a shaft W is supported, wherein the shaft W carries a gear Z, the in a second gear (not shown) engages.
- One Pumped through the gear pump - in the Tooth gaps of gears Z - from an inlet opening (also referred to as the suction side) to the outlet opening (also known as printing page) is promoted, due to the prevailing pressure conditions of the Tooth gap in the storage area according to the in Fig. 1st shown arrow SZ, i. the fluid flows in Slide bearing GL from the gear side ZS to the seal side DS.
- the fluid, the on the sealing side exits from the plain bearing GL, dissipate and otherwise to use or dispose of.
- Fig. 2 shows an inventive gear pump, the a housing G, a housing cover D and two Intermeshing gears Z1 and Z2 exists, with at This embodiment, the first gear Z1 on a shaft AW mounted or forms with this a pump component.
- the shaft AW and thus the gear Z1 are using a motor (not shown) driven.
- the second gear Z2 through the first driven.
- the first Z1 and the second gear Z2 each be powered by a separate motor.
- two Provide shaft bushings of course also be sealed accordingly, with this conventional seals are used.
- Fig. 3 is a gear pump with such three-part pump housing shown, with the Gears Z1 and Z2 receiving housing G front each is provided with a cover D1 or D2.
- Fig. 4 shows a partial cross-section according to Sectional plane A-A through that shown in Fig. 2 Gear pump according to the invention.
- this cross section are Inlet and outlet openings EO and AO for the Conveyed medium FM, the gears Z1 and Z2 with their Tooth heads ZK and partially the housing G of Gear pump according to the invention can be seen.
- the radial positioning of the gears Z1 takes place and Z2 via their tooth tips ZK and the housing G.
- Due the force distribution in steady state operation of the Gear pump is mainly in load ranges LB a adequate lubrication is required because in these Load ranges LB corresponding forces from the housing G must be included.
- an entrance and a Outlet bore for the pumped medium FM are provided, which is substantially perpendicular to the longitudinal axes of Gears Z1 and Z2 are stationary.
- Conceivable and also advantageous opposite to the above variant is a Embodiment in which two or more entrance and / or Outlet openings are provided for the pumped medium FM, because in such an embodiment, the Possibility that the tooth heads ZK also in the field of Can support the inlet and outlet openings.
- These Embodiment has the particular advantage that the edges of the inlet opening are relieved.
- the Conveying medium with respect to the toothed wheels at the front side or dissipated is basically the Possibility that the tooth heads are stored the same way on all sides can be.
- the inlet and / or the outlet opening or the associated inlet and outlet bore Run substantially in this embodiment parallel to the gear axes.
- FIGs. 5A and 5B is a detail of a gear 5A
- a Fig. 5A is a known - provided that slide bearings are provided for the shafts - and FIG. 5B shows an embodiment according to the invention in a section perpendicular to the gear center axis MA show.
- slide bearings are added used to hold the gears in their position. In the case of the gear pumps according to the invention, this takes place Positioning as mentioned in that the tooth heads ZK slide on the inside of the housing bore.
- Coating Since durable materials are expensive, will proposed, instead of a massive construction, the strong claimed parts with a protective layer of the To coat resistant material (so-called Coating).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Description
- Fig. 1
- eine in ein Gleitlager eingeführte Welle einer bekannten Zahnradpumpe,
- Fig. 2
- eine erfindungsgemässe Zahnradpumpe mit zweiteiligem Gehäuse in schematischer Darstellung,
- Fig. 3
- eine erfindungsgemässe Zahnradpumpe mit dreiteiligem Gehäuse in schematischer Darstellung,
- Fig. 4
- einen Schnitt entlang A-A durch die erfindungsgemässe Zahnradpumpe dargestellt in Fig. 2 und
- Fig. 5
- Ausführungsformen der Zahnköpfe bei einem bekannten (Fig. 5A) und einem erfindungsgemässen Zahnrad (Fig. 5B).
Claims (7)
- Verfahren zum Positionieren von Zahnrädern bei Zahnradpumpen, bestehend aus einem Pumpengehäuse (G; D; D1, D2) mit mindestens zwei Bohrungen zur Aufnahme von mindestens zwei Zahnrädern (Z1, Z2), die ineinandergreifende Zahnköpfe (ZK) aufweisen, und bestehend aus einer Eintritts- (EO) und einer Austrittsöffnung (AO) für das Fördermedium (FM), wobei das radiale Positionieren der Zahnräder (Z1, Z2) über die Zahnköpfe (ZK) und die Innenseite der Bohrungen im Pumpengehäuse (G; D; D1, D2) erfolgt, dadurch gekennzeichnet, dass im Bereich der Eintritts- (EO) und der Austrittsöffnung (AO) die Zahnräder (Z1, Z2) zur weiteren radialen Positionierung abgestützt werden, indem zwei oder mehrere Eintritts- (EO) und/oder Austrittsöffnungen (AO) für das Fördermedium (FM) vorgesehen sind.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das axiale Positionieren über mindestens einen Gehäusedeckel (D; D1, D2) erfolgt.
- Zahnradpumpe zur Förderung von flüssigen Medien (FM), wobei die Zahnradpumpe ein Pumpengehäuse (G; D; D1, D2) mit mindestens zwei Bohrungen, in denen mindestens zwei ineinandergreifende Zahnräder (Z1, Z2) mit Zahnköpfen (ZK) enthalten sind, und eine Eintritts- (EO) und eine Austrittsöffnung (AO) für das Fördermedium (FM) aufweist, und die Zahnräder (Z1, Z2) im Gehäuse (G) radial gelagert sind, wobei die Lagerflächen auf der einen Seite aus Bereichen der Zahnköpfe (ZK) und auf der anderen Seite aus Bereichen der Innenseite der Bohrungen im Pumpengehäuse (G; D; D1, D2) bestehen, dadurch gekennzeichnet, dass die Eintritts- (EO) und die Austrittsöffnung (AO) unterteilt sind, um eine Abstützung der Zahnräder (Z1, Z2) auch im Bereich der Eintritts- (EO) und der Austrittsöffnung (AO) zu gewährleisten.
- Zahnradpumpe nach Anspruch 3, dadurch gekennzeichnet, dass die Zahnräder (Z1, Z2) im Pumpengehäuse (G; D; D1, D2) axial gelagert sind, wobei die Lagerflächen auf der einen Seite aus Bereichen des Pumpengehäuses (G; D; D1, D2), mindestens eines Gehäusedeckels (D; D1, D2) und auf der anderen Seite aus stirnseitigen Bereichen der Zahnräder (Z1, Z2) bestehen.
- Zahnradpumpe nach einem der Ansprüche 3 bis 4, dadurch gekennzeichnet, dass für die Lagerflächen auf den Zahnköpfen (ZK) und/oder auf dem Pumpengehäuse (G; D; D1, D2) ein äusserst widerstandsfähiges Material verwendet wird, wobei vorzugsweise die stark beanspruchten Bereiche mit einer Schicht aus diesem Material überzogen sind.
- Zahnradpumpe nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass die Eintritts- (EO) und/oder die Austrittsöffnung (AO) in bezug auf die Zahnräder (Z1, Z2) stirnseitig vorgesehen sind.
- Verfahren zur Herstellung einer Zahnradpumpe, bestehend aus einem Pumpengehäuse (G; D; D1, D2) mit mindestens zwei Bohrungen zur Aufnahme von mindestens zwei Zahnrädern (21, Z2), die ineinandergreifende Zahnköpfe (ZK) aufweisen, und bestehend aus einer Eintritts- (EO) und einer Austrittsöffnung (AO) für das Fördermedium (FM), wobei das radiale Positionieren der Zahnräder (Z1, Z2) über die Zahnköpfe (ZK) und die Innenseite der Bohrungen im Pumpengehäuse (G; D; D1, D2) erfolgt, dadurch gekennzeichnet, dass im Bereich der Eintritts- (EO) und der Austrittsöffnung (AO) die Zahnräder (Z1, Z2) zur weiteren radialen Positionierung abgestützt werden, indem zwei oder mehrere Eintritts- (EO) und/oder Austrittsöffnungen (AO) für das Fördermedium (FM) vorgesehen sind.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59711969T DE59711969D1 (de) | 1997-12-23 | 1997-12-23 | Verfahren zur Wellenpositionierung und eine Zahnradpumpe |
EP19970122713 EP0833056B1 (de) | 1997-12-23 | 1997-12-23 | Verfahren zur Wellenpositionierung und eine Zahnradpumpe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19970122713 EP0833056B1 (de) | 1997-12-23 | 1997-12-23 | Verfahren zur Wellenpositionierung und eine Zahnradpumpe |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0833056A2 EP0833056A2 (de) | 1998-04-01 |
EP0833056A3 EP0833056A3 (de) | 1998-07-15 |
EP0833056B1 true EP0833056B1 (de) | 2004-09-29 |
Family
ID=8227861
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19970122713 Expired - Lifetime EP0833056B1 (de) | 1997-12-23 | 1997-12-23 | Verfahren zur Wellenpositionierung und eine Zahnradpumpe |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0833056B1 (de) |
DE (1) | DE59711969D1 (de) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE323573C (de) * | 1918-04-23 | 1920-07-31 | Fried Krupp Akt Ges | Zahnradpumpe fuer hohe Drehzahlen |
US2626570A (en) * | 1947-06-13 | 1953-01-27 | Euclid Road Machinery Co | Floating gear pump |
US3286643A (en) * | 1963-10-14 | 1966-11-22 | Dowty Technical Dev Ltd | Gear pumps and motors |
FR2163935A5 (de) * | 1971-12-07 | 1973-07-27 | Rhone Poulenc Sa | |
US4386893A (en) * | 1981-05-04 | 1983-06-07 | Deere & Company | Gear pump or motor with a shaftless gear |
DE3312868C2 (de) * | 1983-04-09 | 1986-03-20 | Glyco-Antriebstechnik Gmbh, 6200 Wiesbaden | Hydropumpe |
EP0753678B1 (de) | 1996-07-17 | 2003-04-23 | Maag Pump Systems Textron AG | Gleitlager für eine Welle |
-
1997
- 1997-12-23 EP EP19970122713 patent/EP0833056B1/de not_active Expired - Lifetime
- 1997-12-23 DE DE59711969T patent/DE59711969D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0833056A3 (de) | 1998-07-15 |
EP0833056A2 (de) | 1998-04-01 |
DE59711969D1 (de) | 2004-11-04 |
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