EP0953768A1 - Zahnradmaschine - Google Patents
Zahnradmaschine Download PDFInfo
- Publication number
- EP0953768A1 EP0953768A1 EP99105522A EP99105522A EP0953768A1 EP 0953768 A1 EP0953768 A1 EP 0953768A1 EP 99105522 A EP99105522 A EP 99105522A EP 99105522 A EP99105522 A EP 99105522A EP 0953768 A1 EP0953768 A1 EP 0953768A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gear machine
- gears
- gear
- pump
- motor
- 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
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
- F04C2/084—Toothed wheels
Definitions
- the invention relates to a gear machine (pump or Motor) according to the genus of claim 1.
- Conventional gear machines are as external or as Internal gear machines with uniform gear ratios Engines known in a variety of designs. Such engines generate due to the constantly moving Sealing point in the tooth mesh periodically Tooth mesh frequency pulsating flow. Pressure pulsations in the flow can be a component connected hydraulic circuit and are causal for that in the environment of this hydraulic circuit perceptible sound.
- the gear machine according to the invention (Pump or motor) with the characteristic features of the Claim 1 the advantage that the tooth geometry on their back flanks a lifting of the driving conveyor flanks reliably avoid each other.
- the gear machine works thereby, especially in connection with a pulsation-optimized conveyor teeth according to claim 2, particularly effective, i.e. with a high volumetric Efficiency and extremely low vibration and quiet.
- Figure 1 shows the engagement relationships of two Gears one known from the prior art Engine in a side view
- Figure 2 are in Comparison of the engagement conditions of a Gear machine according to the invention shown.
- the constructive embodiment of the invention is shown in Figure 3 of a tooth shown in perspective.
- Gear machine described are two gears in Figure 1 10, 12 shown in sections, which are exemplary in Comb external interference.
- the gear 10 is on not shown manner rotatably with a drive shaft coupled and rotates according to the direction arrow R counter clockwise.
- the in the direction of rotation leading torque-transmitting flank 14 of a tooth 16 of the gearwheel 10 touches the point of engagement E.
- torque-transmitting flank 18 of a tooth 20 of the gear 12 drives this.
- the gear 12 is on one also not shown axis mounted, the parallel to be arranged to the drive shaft. Due to the Flank shape of the torque-transmitting flanks 14 and 18
- the point of engagement E moves in the course of the progressive Tooth mesh on a designated as line of engagement L. imaginary line. This line of engagement L consists of two opposing curved arc sections together.
- the point of engagement E denotes the point at which the Suction side 22 of this gear machine in the course of the whole Gear engagement hydraulically separated from the pressure side 24 is.
- the two gear wheels 10, 12 convey in their tooth chambers 26 a pressure medium from this suction side 22 to the pressure side 24 the gear machine, wherein when the teeth mesh 16, 20 displaced pressure medium and thereby on the pressure side 24 an increase in pressure is effected.
- Pressure pulsation that extends into the connected Can propagate hydraulic lines into it.
- the invention is based on the knowledge that a lift off torque-transmitting flanks 14, 18 from one another Eliminate backlash 28 of gears 10, 12 can be prevented.
- the pressure medium delivery and the reduction of pulsations in the conveyed pressure medium flow still takes place through the Shape of the torque-transmitting flanks 14, 18.
- the not torque-transmitting flanks 30, 32 of the gear wheels 10, 12 are shaped to have an identical movement to that Flanks 14, 18 would be transmitted, but without regard any pressure pulsation in the gear machine to be optimized.
- a hydraulic sealing effect of the Back flank intervention would therefore be detrimental to that Conveyance behavior of this gear machine. Therefore only a mechanically effective, but not hydraulically effective flank contact on the not torque-transmitting flanks 30, 32 are to be generated these flanks 30, 32 are provided with recesses 34 (FIG. 3), the as overflow grooves between two in the direction of rotation successive tooth chambers 26 act.
- the between the Engagement points E1 and E3 lying engagement point E2 remains through these recesses 34 the only one hydraulically effective, i.e. the pressure side 24 from the suction side 22 separating point of intervention.
- the recesses 34 can on the non-torque-transmitting edges 30, 32 one or both gears 10, 12 may be formed. Are both Gears 10, 12 provided with recesses 34, so must these are not necessarily on a common level run. Likewise, several recesses 34 are on one of the non-torque-transmitting flanks 30, 32 possible.
- FIG. 3 shows in one perspective view exemplifying a single tooth 20 of the driven gear 12.
- one Recess 34 is provided in the form of a groove that itself extends from the tooth base to the tooth head.
- This groove has a rectangular cross section with in Direction of expansion constant dimensions.
- the groove is centered on the non-torque transmitting flank 32 of the tooth 20 is arranged and is on both of them Long sides delimited by rear flank sections 36.
- This Rear flank sections 36 are shown in FIG Engagement with those of the counter wheel and eliminate that Back flank play 28 between the gears 10, 12 while the recess 34, for the reasons stated, the hydraulic one Sealing effect of the engagement points E1 and E3 prevented.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
Description
Claims (7)
- Zahnradmaschine (Pumpe oder Motor) mit einem Triebwerk aus wenigstens zwei miteinander kämmenden Zahnrädern (10, 12), in dessen Zahnkammern (26) ein Druckmittel unter Energieaufnahme bzw. -abgabe von einem Einlaß (22) zu einem Auslaß (24) strömt, dadurch gekennzeichnet, daß die Zahnräder (10, 12) im Verlauf eines Zahneingriffs zumindest annähernd im Zweiflankenkontakt kämmen und daß die Zahnräder (10, 12) an ihren nicht drehmomentübertragenden Flanken (30, 32) Mittel (34) zur hydraulischen Kopplung zweier aufeinanderfolgender Zahnkammern (26) aufweisen.
- Zahnradmaschine (Pumpe oder Motor) nach Anspruch 1, dadurch gekennzeichnet, daß die drehmomentübertragenden Zahnflanken (14, 18) der Zahnräder (10, 12) zur Förderung eines wenigstens annähernd konstanten Druckmittelstroms eine Flankenkontur aufweisen, die eine im Verlauf des Zahneingriffs veränderliche Übersetzung erzeugt.
- Zahnradmaschine (Pumpe oder Motor) nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Mittel zur hydraulischen Kopplung zweier aufeinanderfolgender Zahnkammern (26) wenigstens eine nutförmige Ausnehmung (34) umfassen.
- Zahnradmaschine (Pumpe oder Motor) nach Anspruch 3, dadurch gekennzeichnet, daß beide Zahnräder (10, 12) an ihren nicht drehmomentübertragenden Flanken (30, 32) jeweils wenigstens eine Ausnehmung (34) aufweisen und daß die Ausnehmungen (34) in zueinander versetzten Ebenen angeordnet sind.
- Zahnradmaschine (Pumpe oder Motor) nach einem der Ansprüche 3 oder 4, dadurch gekennzeichnet, daß die Ausnehmungen (34) sich vom Fußkreis bis zum Kopfkreis eines der Zahnräder (10, 12) erstrecken.
- Zahnradmaschine nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß die Ausnehmungen (34) in Ausdehnungsrichtung einen konstanten Querschnitt aufweisen.
- Zahnradmaschine (Pumpe oder Motor) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Zahnradmaschine als Innen- oder als Außenzahnradmaschine ausgebildet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19818948 | 1998-04-28 | ||
DE1998118948 DE19818948B4 (de) | 1998-04-28 | 1998-04-28 | Hydraulische Zahnradmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0953768A1 true EP0953768A1 (de) | 1999-11-03 |
EP0953768B1 EP0953768B1 (de) | 2004-06-02 |
Family
ID=7866040
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19990105522 Expired - Lifetime EP0953768B1 (de) | 1998-04-28 | 1999-03-18 | Zahnradmaschine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0953768B1 (de) |
DE (1) | DE19818948B4 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2408547A (en) * | 2003-11-26 | 2005-06-01 | Bosch Gmbh Robert | Gear pump with recessed tooth flanks |
WO2019091720A1 (de) * | 2017-11-13 | 2019-05-16 | Zf Friedrichshafen Ag | Tragbildprüfung |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10003735A1 (de) * | 2000-01-28 | 2000-11-16 | Bosch Gmbh Robert | Hydraulische Zahnradmaschine |
DE102017210594A1 (de) * | 2016-12-16 | 2018-06-21 | Zf Friedrichshafen Ag | Segmentierte Zahnflanken |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR446952A (fr) * | 1911-10-14 | 1912-12-19 | Robert Esnault Pelterie | Changement de vitesse hydraulique |
GB1263921A (en) * | 1968-04-25 | 1972-02-16 | Lucas Industries Ltd | Gear pumps |
DE4022500A1 (de) | 1990-07-14 | 1992-01-16 | Gisbert Prof Dr Ing Lechner | Zahnradpumpe oder motor |
EP0754859A2 (de) * | 1996-06-07 | 1997-01-22 | Maag Pump Systems AG | Zahnrad mit Bohrung |
DE19612499A1 (de) * | 1996-03-29 | 1997-10-02 | Bosch Gmbh Robert | Zahnradmaschine (Pumpe oder Motor) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1633793A (en) * | 1924-01-25 | 1927-06-28 | Hardinge Brothers Inc | Gear pump |
DE3417824A1 (de) * | 1984-05-14 | 1985-11-14 | Rudolf Prof. Dr.-Ing. Röper | Zahnradpaare fuer rotationskolbenmaschinen |
DE19612497B4 (de) * | 1996-03-29 | 2004-02-05 | Robert Bosch Gmbh | Zahnradmaschine |
-
1998
- 1998-04-28 DE DE1998118948 patent/DE19818948B4/de not_active Expired - Fee Related
-
1999
- 1999-03-18 EP EP19990105522 patent/EP0953768B1/de not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR446952A (fr) * | 1911-10-14 | 1912-12-19 | Robert Esnault Pelterie | Changement de vitesse hydraulique |
GB1263921A (en) * | 1968-04-25 | 1972-02-16 | Lucas Industries Ltd | Gear pumps |
DE4022500A1 (de) | 1990-07-14 | 1992-01-16 | Gisbert Prof Dr Ing Lechner | Zahnradpumpe oder motor |
WO1992001870A1 (de) * | 1990-07-14 | 1992-02-06 | Gisbert Lechner | Zahnradpumpe oder motor |
DE19612499A1 (de) * | 1996-03-29 | 1997-10-02 | Bosch Gmbh Robert | Zahnradmaschine (Pumpe oder Motor) |
EP0754859A2 (de) * | 1996-06-07 | 1997-01-22 | Maag Pump Systems AG | Zahnrad mit Bohrung |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2408547A (en) * | 2003-11-26 | 2005-06-01 | Bosch Gmbh Robert | Gear pump with recessed tooth flanks |
WO2019091720A1 (de) * | 2017-11-13 | 2019-05-16 | Zf Friedrichshafen Ag | Tragbildprüfung |
Also Published As
Publication number | Publication date |
---|---|
DE19818948A1 (de) | 1999-11-11 |
DE19818948B4 (de) | 2005-11-17 |
EP0953768B1 (de) | 2004-06-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69817378T2 (de) | Innenzahnradpumpe | |
EP1715143A2 (de) | Linearspannsystem | |
EP1340913B1 (de) | Zahnradmaschine | |
EP1252444B1 (de) | Antrieb einer schraubenspindelpumpe | |
DE3249585T1 (de) | Zahnradpumpe für inkompressible Medien | |
EP2912346B1 (de) | Geschwindigkeits-wechselgetriebe für kraftfahrzeuge | |
DE4303337C2 (de) | Zahnradmaschine | |
EP0953768B1 (de) | Zahnradmaschine | |
EP1261806B1 (de) | Inverser verzahnungsrotorsatz | |
EP0539396B1 (de) | Zahnradpumpe oder motor | |
EP3452741B1 (de) | Getriebe mit einer an einem tellerrad des getriebes mechanisch angetriebenen pumpe | |
WO1990014254A2 (de) | Pendelgetriebe, insbesondere für scheibenwischer an kraftfahrzeugen | |
EP0661454B1 (de) | Sichellose Innenzahnradpumpe | |
DE19825667C2 (de) | Hydraulischer Druckerzeuger | |
DE19612497B4 (de) | Zahnradmaschine | |
DE19526443C2 (de) | Zahnradmaschine | |
DE10003735A1 (de) | Hydraulische Zahnradmaschine | |
DE19612499B4 (de) | Zahnradmaschine (Pumpe oder Motor) | |
DE2439358A1 (de) | Hydrostatische pumpe oder motor | |
DE3925202A1 (de) | Kegelzahnradpumpe | |
EP0798462A1 (de) | Zahnradmaschine | |
EP0831233A1 (de) | Zahnradpumpe | |
WO2023156237A1 (de) | Gerotor-pumpenstufe, förderpumpe, fahrzeug sowie verfahren zur herstellung der gerotor-pumpenstufe, der förderpumpe und des fahrzeugs | |
DE19825376C2 (de) | Zahnradmaschine | |
EP0429702A1 (de) | Hochuntersetzendes Getriebe mit einer verschlungenen Zykloide im Eingriff |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): FR GB IT |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
17P | Request for examination filed |
Effective date: 20000503 |
|
AKX | Designation fees paid |
Free format text: FR GB IT |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
|
17Q | First examination report despatched |
Effective date: 20030225 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): FR GB IT |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SCHWUCHOW, DIETMAR |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20040823 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20050303 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20060322 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20060331 Year of fee payment: 8 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20070318 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20071130 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070318 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070402 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20060323 Year of fee payment: 8 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070318 |