EP0879962A1 - Zahnradmaschine - Google Patents
Zahnradmaschine Download PDFInfo
- Publication number
- EP0879962A1 EP0879962A1 EP98106648A EP98106648A EP0879962A1 EP 0879962 A1 EP0879962 A1 EP 0879962A1 EP 98106648 A EP98106648 A EP 98106648A EP 98106648 A EP98106648 A EP 98106648A EP 0879962 A1 EP0879962 A1 EP 0879962A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gear machine
- pump
- motor
- gear
- pressure
- 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.)
- Granted
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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
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/088—Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement
Definitions
- the invention relates to a gear machine (pump or motor) according to the genus of claim 1.
- gear machines With such known gear machines is used during the double intervention the gears between the respective points of engagement volume of pressure medium enclosed in the tooth chambers Course of the rotation of the gears of a compression with subsequent Decompressed.
- the Associated Pressure pulsation leads to a relatively high level of noise.
- the pinch oil pressure that arises during this pressure pulsation to limit.
- These are arranged in the side Sealing elements of the tooth chambers, pilot grooves arranged, which are designed so that the pinch oil space as long as possible is connected to the drain side of the gear machine. compression and decompression of the trapped pinch oil do not take place in the closed volume. In order to the pressure gradient that occurs and the resulting pressure drop Noise.
- a gear machine according to the invention with the characteristic has the advantage that they have a further reduced operating noise with better has volumetric efficiency.
- the Gear machine relatively simple and inexpensive to implement Absorber elements designed with the pinch oil chamber get in touch.
- the absorber elements take up the compression volume and give it as the gear rotates free again so that there is no excessive squeeze oil pressure. This enables a with unchanged noise level higher VAT coverage resulting in better volumetric Efficiency of the gear machine or a coarser tolerance of the reversal, combined with less Parts costs for the bearing bushes / glasses.
- FIG. 1 shows a section shown in Figure 1 only partially by a gear machine shown in simplified form
- Figure 2 shows an enlarged illustration of a detail according to FIG. 1.
- Figure 3 shows a section along the line III-III Figure 2 by one of the bearing bushes with a first embodiment for an absorber element
- Figure 4 is a represents second embodiment of an absorber element.
- 10 is the only indicated housing Gear machine described, in the interior 11 of each other an inlet channel 12 and an outlet channel 13 lie opposite one another flow out. In the interior 11 mesh two gears 14 and 15 in External interference with each other.
- the gear machine is in this Embodiment designed as a gear pump, the Gear 15 counterclockwise in a manner not shown here is driven.
- the gears 14 and 15 are with their shaft journals, not shown, in four bearing bushes stored, of which the bearing bushes in Figure 1 16 and 17 are shown.
- the not drawn, opposite Bearing bushes are correspondingly symmetrical educated. These bushings are on known Sealing on the gear side surfaces.
- the two gears 14, 15 In the engagement area shown enlarged in FIG. 2 of the two gears 14, 15 are two pairs of teeth in Engagement, namely in an engagement point E1 and an second engagement point E2. These engagement points E1 and E2 lie on a common line of action E, which at known involute gears an pressure angle of, for example, 20 degrees. Between the two points of intervention E1 and E2 is the two gears 14, 15 includes a pinch oil chamber 26, the volume of which changes over the angle of rotation. The pinch oil chamber 26 is at Entry of a pair of teeth closed, with the rotation of the Gears 14, 15 initially reduced in size as they progress Rotation increases and when the other diverge Pairs of teeth opened again. This compression / decompression process is known per se and runs between two engaged tooth pairs.
- Damper element 30 is arranged, which consists of a support body 32 and a membrane 31.
- the support body 32 is from formed a plate-like steel body, the circumferential contour is matched to the shape of the recess 27, 28.
- This support body 32 is essentially preloaded is pressed flush into the recess 27, 28 and is located on the gears 14, 15 (Fig. 1) facing side of the Bearing bush 16, 17.
- the support body 32 is essentially ring-shaped and encloses a continuous opening 34. In the direction of those facing away from the gears 14, 15 Side of the bearing bush 16, 17 closes the support body 32 the membrane 31.
- This membrane 31 extends over the entire width of the support body 32 and covers it Opening 34, which is directly connected to the pinch oil chamber 26 is, from.
- the membrane 31 is made of an elastomer and is vulcanized to the support body 32 so that the absorber element 30 forms a one-piece component.
- the Side of the membrane 31 facing away from the support body 32 is subjected to high pressure as an example. This leads to the recess 27, 28 into which the absorber element 30 is inserted is, in a pressure field 33 that on the the Tilgerelement 30 opposite side of the bearing bush 16, 17 is formed and connected to the drain channel 13 of the gear machine is.
- the damper elements 30 of the gear machine according to the invention become elastic when the pressure in the pinch oil chamber 26 rises deforms and thereby dampen this excess pressure. As As a result, the speed at which the the pressure in the pinch oil chamber 26 changes, which changes in a reduction in the operating noise of the gear machine. Due to the elastic deformation of the damper elements 30 during a compression / decompression cycle of the pinch oil space 26 accordingly a hydraulic capacity is formed, which smoothes the pressure fluctuations in the pinch oil chamber 26. In contrast to known solutions, this is built hydraulic capacity, however, in the course of a compression / decompression cycle up and down again, so that themselves regarding the delivery volume and the volumetric Efficiency of the gear machine no deterioration Set gear machines without damper elements 30.
- This advantage is also on the function of the support body 32 determines, which in this context consists in that the support body 32 bulges in the decompression phase the membrane 31 in the direction of the gears 14, 15 prevented. As a result, the pressure medium delivery direction is opposed prevents flowing backflow of pressure medium, otherwise reduce the delivery rate of the gear machine would.
- the achievable noise reduction can also be optimized implement on the mechanics of the gear machine, the otherwise cause an increase in operating noise would.
- the pilot grooves 24, 25 the gear machine can be shortened, making the accepted short circuit between the high and low pressure side the gear machine reduced or avoided can be.
- This also has a positive effect on the volumetric Efficiency of the gear machine. Avoidance a hydraulic short circuit is the reason that the damper elements 30 or these damper elements 30 receiving recesses 27, 28 are arranged so that they not cut from the line of engagement E of the gear assembly will.
- the recesses 27, 28 not in the manner described here limited. So it is also possible, for example, the recesses 27, 28 to form as blind holes. As well are different versions of the damper elements 30 possible.
- the damper element 30 is designed as a piston 35, which is slidably arranged in a cylinder bore 37 is.
- This cylinder bore 37 is exemplary Blind hole or as a through hole closed on one side formed, at the bottom of which the piston 35th acting compression spring 36 is supported.
- the towards the not shown gears 14, 15 directed stroke of the piston 35 is limited by a stop ring 38, which is comparable to the support body 32 of the elastic absorber element 30 delimits an opening 34 and on which the gears 14, 15 facing side of the cylinder bore 37 flush into this is pressed.
- the cylinder bore 37 by way of example Radial channel 39 with the high pressure side of the gear machine connected.
- a pressure threshold adapted to the application adjust from which the piston 35 to pressure changes reacts in the pinch oil chamber 26 uses throttles, not shown, in the radial channel 39, which, for example, the influence of the compression spring 36 on the Can compensate piston stroke movement.
- throttles not shown
- the decompression phase of the pinch oil chamber 26 is the one formed hydraulic capacity reduced again, so that the same effects also with this movable damper element 30 adjust as they are already with the stationary elastic Damper element 30 have been described.
- the exemplary embodiments described are both suitable for gear machines with bearing bushes, with bearing glasses, as also for those with sealing plates.
- the recesses 27, 28 of the damper elements 30th basically in all walls delimiting the tooth chambers can be attached.
- the damper elements 30 also in the To arrange tooth flanks of the gears 14, 15, if this is due the requirements for the strength of the gears 14, 15 is possible.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
Description
Claims (11)
- Zahnradmaschine (Pumpe oder Motor) mit einem Gehäuse (10), in dessen Innenraum (11) eine Zahnradanordnung aus wenigstens zwei Zahnrädern (14, 15) angeordnet ist, die unter Ausbildung eines Quetschölraums (26) miteinander kämmen, dadurch gekennzeichnet, daß die Zahnradmaschine wenigstens ein Tilgerelement (30) aufweist, das vom Druck im Quetschölraum (26) beaufschlagt ist.
- Zahnradmaschine (Pumpe oder Motor) nach Anspruch 1, dadurch gekennzeichnet, daß das wenigstens eine Tilgerelement (30) im nicht druckbeaufschlagten Zustand im wesentlichen bündig auf der dem Quetschölraum (26) zugewandten Seite einer Ausnehmung (27, 28) angeordnet ist, und daß die Ausnehmung (27,28) abseits der Eingriffslinie (E) der Zahnradanordnung positioniert ist.
- Zahnradmaschine (Pumpe oder Motor) nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß das Tilgerelement (30) infolge der Druckbeaufschlagung eine Auslenkung erfährt, die kleiner ist, als die Tiefe der das Tilgerelement (30) aufnehmenden Ausnehmung (27, 28).
- Zahnradmaschine (Pumpe oder Motor) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Tilgerelement (30) aus einer elastischen Membran (31) besteht, die mit einem ortsfesten Stützelement (32) zusammenwirkt, und daß das Tilgerelement (30) die Ausnehmung (27, 28) verschließt.
- Zahnradmaschine (Pumpe oder Motor) nach Anspruch 4, dadurch gekennzeichnet, daß die Membran (31) aus einem Elastomer gefertigt ist, und daß das Tilgerelement (30) durch Anvulkanisieren der Membran (31) an das Stützelement (32) als einteiliges Bauteil ausgebildet ist, das in die Ausnehmung (27, 28) eingepreßt ist.
- Zahnradmaschine (Pumpe oder Motor) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Tilgerelement (30) ein Kolben (35) ist, der gegen die Kraft einer Druckfeder (36) in einer Zylinderbohrung (37) beweglich geführt ist.
- Zahnradmaschine (Pumpe oder Motor) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Tilgerelement (30) auf seiner vom Quetschölraum (26) abgewandten Seite mit Druck, insbesondere mit Systemdruck der Zahnradmaschine, beaufschlagt ist.
- Zahnradmaschine (Pumpe oder Motor) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die das Tilgerelement (30) aufnehmenden Ausnehmungen (27, 28) an den Zahnflanken der Zahnräder (14, 15) ausgebildet sind.
- Zahnradmaschine (Pumpe oder Motor) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die das Tilgerelement (30) aufnehmenden Ausnehmungen (27, 28) in den Bauteilen der Zahnradmaschine angeordnet sind, die die Zahnkammern der Zahnräder (14,15) seitlich verschließen.
- Zahnradmaschine (Pumpe oder Motor) nach Anspruch 9, dadurch gekennzeichnet, daß die die Zahnkammern der Zahnräder (14,15) verschließenden Bauteile der Zahnradmaschine Lagerbuchsen (16, 17) oder Lagerbrillen sind, die auf ihren von den Zahnrädern (14, 15) abgewandten Seiten mit Systemdruck beaufschlagte Druckflächen (33) ausbilden, und daß die die Tilgerelemente (30) aufnehmenden Ausnehmungen (27, 28) Durchgangsbohrungen sind, die die Lagerbuchsen (16, 17) oder die Lagerbrillen durchdringen und im Bereich der Druckflächen (33) münden.
- Zahnradmaschine (Pumpe oder Motor) nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß das Gehäuse (10) der Zahnradmaschine mehrteilig ausgebildet ist und aus einem Antriebsdeckel, einem Ringkörper und einem Verschlußdeckel besteht.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19721621A DE19721621C2 (de) | 1997-05-23 | 1997-05-23 | Zahnradmaschine |
DE19721621 | 1997-05-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0879962A1 true EP0879962A1 (de) | 1998-11-25 |
EP0879962B1 EP0879962B1 (de) | 2004-03-03 |
Family
ID=7830292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98106648A Expired - Lifetime EP0879962B1 (de) | 1997-05-23 | 1998-04-09 | Zahnradmaschine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0879962B1 (de) |
DE (2) | DE19721621C2 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1081381A3 (de) * | 1999-09-06 | 2002-09-11 | Koyo Seiko Co., Ltd. | Zahnradpumpe |
DE102010039262A1 (de) | 2010-08-12 | 2012-02-16 | Technische Universität Dresden | Zahnradmaschine mit Druckumsteuerung |
WO2014102419A1 (es) * | 2012-12-27 | 2014-07-03 | Universitat Politècnica De Catalunya | Bomba de engranajes con cámara de amortiguación de pulsaciones de presión en la cámara de aspiración para reducción de ruido y vibraciones |
WO2014171744A1 (en) | 2013-04-17 | 2014-10-23 | Nag-Bok Lim | A silent gear pump or motor suppressing troubles of trapping fluid |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3145661A (en) * | 1962-12-19 | 1964-08-25 | New York Air Brake Co | Pump |
US3833317A (en) * | 1971-03-04 | 1974-09-03 | R Rumsey | Rotary gear motor/pump having hydrostatic bearing means |
FR2465907A1 (fr) * | 1979-09-26 | 1981-03-27 | Renault | Pompe hydraulique a engrenages silencieuse par amelioration des flasques |
DE4217160A1 (de) | 1992-05-23 | 1993-11-25 | Bosch Gmbh Robert | Zahnradmaschine (Pumpe oder Motor) |
US5380240A (en) * | 1992-08-20 | 1995-01-10 | Albert Handtmann Maschinenfabrik Gmbh & Co. Kg | Process and device for the subdivision of a pasty and compressible mass in portions, in particular of sausage meat by means of a vane cell pump |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB490963A (en) * | 1937-05-21 | 1938-08-24 | John Burgoyne Pillin | Improvements relating to rotary pumps |
DE2554105C2 (de) * | 1975-12-02 | 1984-04-05 | Robert Bosch Gmbh, 7000 Stuttgart | Zahnradmaschine (Pumpe oder Motor) |
-
1997
- 1997-05-23 DE DE19721621A patent/DE19721621C2/de not_active Expired - Fee Related
-
1998
- 1998-04-09 EP EP98106648A patent/EP0879962B1/de not_active Expired - Lifetime
- 1998-04-09 DE DE59810873T patent/DE59810873D1/de not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3145661A (en) * | 1962-12-19 | 1964-08-25 | New York Air Brake Co | Pump |
US3833317A (en) * | 1971-03-04 | 1974-09-03 | R Rumsey | Rotary gear motor/pump having hydrostatic bearing means |
FR2465907A1 (fr) * | 1979-09-26 | 1981-03-27 | Renault | Pompe hydraulique a engrenages silencieuse par amelioration des flasques |
DE4217160A1 (de) | 1992-05-23 | 1993-11-25 | Bosch Gmbh Robert | Zahnradmaschine (Pumpe oder Motor) |
US5380240A (en) * | 1992-08-20 | 1995-01-10 | Albert Handtmann Maschinenfabrik Gmbh & Co. Kg | Process and device for the subdivision of a pasty and compressible mass in portions, in particular of sausage meat by means of a vane cell pump |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1081381A3 (de) * | 1999-09-06 | 2002-09-11 | Koyo Seiko Co., Ltd. | Zahnradpumpe |
DE102010039262A1 (de) | 2010-08-12 | 2012-02-16 | Technische Universität Dresden | Zahnradmaschine mit Druckumsteuerung |
DE102010039262B4 (de) * | 2010-08-12 | 2012-07-26 | Technische Universität Dresden | Zahnradmaschine mit Druckumsteuerung |
WO2014102419A1 (es) * | 2012-12-27 | 2014-07-03 | Universitat Politècnica De Catalunya | Bomba de engranajes con cámara de amortiguación de pulsaciones de presión en la cámara de aspiración para reducción de ruido y vibraciones |
ES2482766A1 (es) * | 2012-12-27 | 2014-08-04 | Universitat Politècnica De Catalunya | Bomba de engranajes con cámara de amortiguación de pulsaciones de presión en la cámara de aspiración para reducción de ruido y vibraciones |
WO2014171744A1 (en) | 2013-04-17 | 2014-10-23 | Nag-Bok Lim | A silent gear pump or motor suppressing troubles of trapping fluid |
EP2986854A1 (de) * | 2013-04-17 | 2016-02-24 | Nag-Bok Lim | Leise zahnradpumpe oder motor mit unterdrückung von problemen mit auslaufender flüssigkeit |
JP2016515683A (ja) * | 2013-04-17 | 2016-05-30 | リム ナグボクLIM, Nag−Bok | 遮蔽流体トラブルを改善した低ノイズギアポンプまたはモーター |
EP2986854A4 (de) * | 2013-04-17 | 2017-04-05 | Nag-Bok Lim | Leise zahnradpumpe oder motor mit unterdrückung von problemen mit auslaufender flüssigkeit |
US9945230B2 (en) | 2013-04-17 | 2018-04-17 | Nag-Bok Lim | Silent gear pump or motor suppressing troubles of trapping fluid |
Also Published As
Publication number | Publication date |
---|---|
DE59810873D1 (de) | 2004-04-08 |
EP0879962B1 (de) | 2004-03-03 |
DE19721621A1 (de) | 1998-12-03 |
DE19721621C2 (de) | 2000-02-03 |
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