DE102013202917A1 - Geared machine, particularly gear pump or gear motor, has pressure chamber, in which pressure fluid having low particle concentration is present, and channel, through which pressure chamber is connected with axial force compensating groove - Google Patents
Geared machine, particularly gear pump or gear motor, has pressure chamber, in which pressure fluid having low particle concentration is present, and channel, through which pressure chamber is connected with axial force compensating groove Download PDFInfo
- Publication number
- DE102013202917A1 DE102013202917A1 DE201310202917 DE102013202917A DE102013202917A1 DE 102013202917 A1 DE102013202917 A1 DE 102013202917A1 DE 201310202917 DE201310202917 DE 201310202917 DE 102013202917 A DE102013202917 A DE 102013202917A DE 102013202917 A1 DE102013202917 A1 DE 102013202917A1
- Authority
- DE
- Germany
- Prior art keywords
- gear
- pressure
- pressure chamber
- channel
- bearing body
- 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- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/10—Outer members for co-operation with rotary pistons; Casings
- F01C21/104—Stators; Members defining the outer boundaries of the working chamber
- F01C21/108—Stators; Members defining the outer boundaries of the working chamber with an axial surface, e.g. side plates
-
- 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
- F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
-
- 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
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
-
- 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
- F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
- F04C15/0038—Shaft sealings specially adapted for rotary-piston machines or pumps
-
- 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
- F04C2210/00—Fluid
- F04C2210/60—Condition
- F04C2210/62—Purity
-
- 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
- F04C2240/00—Components
- F04C2240/50—Bearings
- F04C2240/52—Bearings for assemblies with supports on both sides
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
Description
Die Erfindung betrifft eine Zahnradmaschine gemäß dem Oberbegriff von Anspruch 1. The invention relates to a gear machine according to the preamble of claim 1.
Aus der
Aufgrund ihrer Schrägverzahnung drücken die Zahnräder mit ihrer Seitenfläche gegen einen Lagerkörper, der in dem Gehäuse aufgenommen ist. Der Lagerkörper ist mit einer Axialkraftkompensationsnut versehen, welche von der Seitenfläche eines zugeordneten Zahnrades überdeckt wird. Die Axialkraftkompensationsnut ist mit dem Hochdruckanschluss verbunden, so dass das Druckfluid in der Axialkraftkompensationsnut mit hohem Druck gegen die Seitenfläche des Zahnrades drückt. Form und Anordnung der Axialkraftkompensationsnut sind so gewählt, dass das Druckfluid nahezu die gesamten axialen Verzahnungskräfte trägt, während auf den Lagerkörper nur ein kleiner Teil dieser axialen Verzahnungskräfte wirkt, der gerade ausreicht, um eine sichere Abdichtung zwischen dem Lagerkörper und dem zugeordneten Zahnrad zu bewirken. Auf diese Weise kann der Verschleiß an den Lagerkörpern minimiert werden. Due to their helical teeth, the gears press with their side surface against a bearing body which is accommodated in the housing. The bearing body is provided with an Axialkraftkompensationsnut, which is covered by the side surface of an associated gear. The Axialkraftkompensationsnut is connected to the high-pressure port, so that the pressure fluid in the Axialkraftkompensationsnut presses against the side surface of the gear with high pressure. Form and arrangement of Axialkraftkompensationsnut are chosen so that the pressurized fluid carries almost the entire axial Verzahnungskräfte, while acting on the bearing body only a small part of these axial Verzahnungskräfte, which is just sufficient to effect a secure seal between the bearing body and the associated gear. In this way, the wear on the bearing bodies can be minimized.
Der Nachteil dieser Zahnradmaschine besteht darin, dass das unter hohem Druck stehende Druckfluid in der Axialkraftkompensationsnut in den Lagerspalt der Drehlagerung des zugeordneten Zahnrades abfließt. Dies ist auf die große Nähe zwischen der Axialkraftkompensationsnut und dem genannten Lagerspalt und die damit einhergehenden unvermeidbaren Leckagen zurückzuführen. Darüber hinaus weist das vom Hochdruckanschluss in die Axialkraftkompensationsnut fließende Druckfluid eine hohe Konzentration an Partikeln, insbesondere Abriebpartikeln, auf. Die ist darauf zurückzuführen, dass die Zahnräder aus gehärtetem Stahl Abrieb am Hauptkörper aus Aluminium verursachen. Die Partikel in der beschriebenen Leckageströmung bewirken, dass die Undichtigkeit zwischen Axialkraftkompensationsnut und Lagerspalt durch Abrieb weiter vergrößert werden, wodurch auch die Leckageverluste immer weiter ansteigen. Im Ergebnis sinkt der Wirkungsgrad der Zahnradmaschine. The disadvantage of this gear machine is that the pressurized fluid under high pressure in the Axialkraftkompensationsnut drains into the bearing gap of the pivot bearing of the associated gear. This is due to the close proximity between the Axialkraftkompensationsnut and said bearing gap and the associated unavoidable leakage. In addition, the pressure fluid flowing from the high-pressure connection into the axial force compensation groove has a high concentration of particles, in particular abrasion particles. This is because the hardened steel gears cause abrasion on the main body made of aluminum. The particles in the described leakage flow cause the leakage between Axialkraftkompensationsnut and bearing gap are further increased by abrasion, whereby the leakage losses continue to increase. As a result, the efficiency of the gear machine decreases.
Die Aufgabe der Erfindung besteht darin, die beschriebene Verschlechterung des Wirkungsgrades der Zahnradmaschine im Lauf des Betriebs zu minimieren bzw. ganz zu vermeiden. The object of the invention is to minimize or completely avoid the described deterioration of the efficiency of the gear machine in the course of operation.
Gemäß dem selbständigen Anspruch wird diese Aufgabe dadurch gelöst, dass in der Zahnradmaschine ein Druckraum vorgesehen ist, in welchem sich vorzugsweise ein Druckfluid befindet, das eine geringe Partikelkonzentration aufweist, wobei ein erster Kanal vorgesehen ist, über den der Druckraum mit der Axialkraftkompensationsnut verbunden ist. Durch die geringere Partikelkonzentration des Druckfluids, welches in die Axialkraftkompensationsnut fließt, wird der beschriebene Abrieb minimiert. Dementsprechend steigen die Leckagen von der Axialkraftkompensationsnut in den Lagerspalt der Drehlagerung der Zahnräder nur wenig bzw. überhaupt nicht an. According to the independent claim, this object is achieved in that in the gear machine, a pressure chamber is provided in which is preferably a pressurized fluid having a low particle concentration, wherein a first channel is provided, via which the pressure chamber is connected to the Axialkraftkompensationsnut. Due to the lower particle concentration of the pressure fluid, which flows into the Axialkraftkompensationsnut, the abrasion described is minimized. Accordingly, the leaks from the Axialkraftkompensationsnut in the bearing gap of the rotary bearing of the gears rise little or not at all.
In den abhängigen Ansprüchen sind vorteilhafte Weiterbildungen und Verbesserungen der Erfindung angegeben. In the dependent claims advantageous refinements and improvements of the invention are given.
Zwischen dem Gehäuse und dem Lagerkörper kann eine Axialfelddichtung angeordnet sein, welche in einer Aufnahmeausnehmung des Lagerkörpers aufgenommen ist, wobei der Druckraum von der Aufnahmeausnehmung begrenzt wird. Eine Axialfelddichtung und eine entsprechende Aufnahmeausnehmung sind beispielsweise aus der
Beim Betrieb der Zahnradmaschine kann Druckfluid von dem Druckraum in die Axialkraftkompensationsnut fließen. Dieses Druckfluid fließt wie beschrieben in den Lagerspalt der Drehlagerung des zugeordneten Zahnrades ab, was aufgrund von Leckagen unvermeidbar ist. Dementsprechend muss der Druckraum wie vorgeschlagen so gewählt werden, das Druckfluid in diesen nachströmen kann. During operation of the gear machine, pressurized fluid may flow from the pressure space into the axial force compensation groove. This pressurized fluid flows as described in the bearing gap of the rotary bearing of the associated gear, which is unavoidable due to leaks. Accordingly, the pressure chamber must be selected as proposed so that the pressurized fluid can flow into it.
In der Zahnradmaschine kann ein zweiter Kanal vorgesehen sein, welcher die Aufnahmeausnehmung mit dem Hochdruckanschluss verbindet. Demnach wird die Axialkraftkompensationsnut nicht mehr direkt vom Hochdruckanschluss her mit Druckfluid versorgt, sondern indirekt über die Aufnahmeausnehmung. Überraschenderweise hat sich gezeigt, dass bei diesem Umweg die Partikelkonzentration im Druckfluid sinkt, wodurch im Ergebnis der eingangs beschriebene Abrieb minimiert wird. In the gear machine, a second channel may be provided, which connects the receiving recess with the high pressure port. Accordingly, the Axialkraftkompensationsnut is no longer supplied directly from the high pressure port ago with pressurized fluid, but indirectly via the receiving recess. Surprisingly, it has been shown that in this detour the particle concentration in the pressure fluid decreases, as a result of which the abrasion described above is minimized.
Der erste Kanal kann von einer Bohrung in dem Lagerkörper gebildet werden. Er ist dementsprechend besonders einfach herstellbar. The first channel may be formed by a bore in the bearing body. He is accordingly very easy to produce.
Die Bohrung kann parallel zur Drehachse des zugeordneten Zahnrades verlaufen. Sie ist dementsprechend besonders leicht herstellbar. The bore may be parallel to the axis of rotation of the associated gear. It is therefore very easy to produce.
Die Erfindung wird im Folgenden anhand der beigefügten Zeichnungen näher erläutert. Es stellt dar: The invention will be explained in more detail below with reference to the accompanying drawings. It shows:
In dem Gehäuse
Die Zahnräder
Die beiden Zahnräder
Einer der Lagerzapfen
Die Innenumfangsfläche
An der Außenumfangsfläche
Die Axialkraftkompensationsnut
Die Aufnahmeausnehmung
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 10 10
- Zahnradmaschine gear machine
- 12 12
- Längsrichtung longitudinal direction
- 20 20
- Gehäuse casing
- 21 21
- Antriebsdeckel drive cover
- 22 22
- Enddeckel End covers
- 23 23
- Niederdruckanschluss Low pressure port
- 24 24
- O-Ring O-ring
- 25 25
- Radialwellendichtring Radial shaft seal
- 26 26
- Zylinderstift straight pin
- 27 27
- Hochdruckanschluss High pressure port
- 30 30
- Hauptkörper main body
- 31 31
- Innenumfangsfläche Inner circumferential surface
- 50 50
- Zahnrad gear
- 51 51
- Drehachse des Zahnrades Rotary axis of the gear
- 52 52
- Lagerzapfen pivot
- 53 53
- Antriebszapfen drive journal
- 60 60
- Lagerkörper bearing body
- 61 61
- Lagerhülse bearing sleeve
- 62 62
- Axialfelddichtung Axialfelddichtung
- 63 63
- Zylinderstift straight pin
- 64 64
- Druckausgleichsfase Druckausgleichsfase
- 65 65
- Axialkraftkompensationsnut Axialkraftkompensationsnut
- 66 66
- Aufnahmeausnehmung für Axialfelddichtung Receiving recess for axial field seal
- 66a 66a
- erster Abschnitt der Aufnahmeausnehmung first portion of the receiving recess
- 66b 66b
- zweiter Abschnitt der Aufnahmeausnehmung second portion of the receiving recess
- 66c 66c
- dritter Abschnitt der Aufnahmeausnehmung third section of the receiving recess
- 67 67
- Anlagefläche contact surface
- 68 68
- Außenumfangsfläche Outer circumferential surface
- 69 69
- erste Dichtfläche first sealing surface
- 70 70
- zweite Dichtfläche second sealing surface
- 71 71
- Verteilausnehmung Verteilausnehmung
- 80 80
- Druckraum pressure chamber
- 81 81
- erster Kanal first channel
- 82 82
- zweiter Kanal second channel
- 83 83
- Bohrung drilling
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102009012853 A1 [0002] DE 102009012853 A1 [0002]
- EP 2154374 A2 [0008] EP 2154374 A2 [0008]
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201310202917 DE102013202917A1 (en) | 2013-02-22 | 2013-02-22 | Geared machine, particularly gear pump or gear motor, has pressure chamber, in which pressure fluid having low particle concentration is present, and channel, through which pressure chamber is connected with axial force compensating groove |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201310202917 DE102013202917A1 (en) | 2013-02-22 | 2013-02-22 | Geared machine, particularly gear pump or gear motor, has pressure chamber, in which pressure fluid having low particle concentration is present, and channel, through which pressure chamber is connected with axial force compensating groove |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102013202917A1 true DE102013202917A1 (en) | 2014-08-28 |
Family
ID=51349398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE201310202917 Withdrawn DE102013202917A1 (en) | 2013-02-22 | 2013-02-22 | Geared machine, particularly gear pump or gear motor, has pressure chamber, in which pressure fluid having low particle concentration is present, and channel, through which pressure chamber is connected with axial force compensating groove |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102013202917A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107304765A (en) * | 2016-04-21 | 2017-10-31 | 施瓦本冶金工程汽车有限公司 | Include the rotary pump of lubrication groove in seal receptacle |
WO2018019587A1 (en) * | 2016-07-26 | 2018-02-01 | Robert Bosch Gmbh | External gear pump for a waste heat recovery system |
CN114320888A (en) * | 2021-11-10 | 2022-04-12 | 浙江环誉泵业科技有限公司 | Helical gear pump and method for eliminating axial force thereof |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005079302A2 (en) * | 2004-02-13 | 2005-09-01 | Argo-Tech Corporation | Low cost gear fuel pump |
DE102009024216A1 (en) * | 2008-06-26 | 2009-12-31 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Displacement machine, particularly displacement pump, has displacement body, which is pivot mounted in pump housing with sliding bearing, where sliding bearing has sliding bearing pressure chamber |
EP2154374A2 (en) | 2008-08-12 | 2010-02-17 | Robert Bosch GmbH | Hydraulic gear wheel machine |
DE102009012853A1 (en) | 2009-03-12 | 2010-09-16 | Robert Bosch Gmbh | Hydraulic gear machine |
DE102009019418A1 (en) * | 2009-04-29 | 2010-11-04 | Schwäbische Hüttenwerke Automotive GmbH | Circulating positive displacement pump with improved bearing lubrication |
-
2013
- 2013-02-22 DE DE201310202917 patent/DE102013202917A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005079302A2 (en) * | 2004-02-13 | 2005-09-01 | Argo-Tech Corporation | Low cost gear fuel pump |
DE102009024216A1 (en) * | 2008-06-26 | 2009-12-31 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Displacement machine, particularly displacement pump, has displacement body, which is pivot mounted in pump housing with sliding bearing, where sliding bearing has sliding bearing pressure chamber |
EP2154374A2 (en) | 2008-08-12 | 2010-02-17 | Robert Bosch GmbH | Hydraulic gear wheel machine |
DE102009012853A1 (en) | 2009-03-12 | 2010-09-16 | Robert Bosch Gmbh | Hydraulic gear machine |
DE102009019418A1 (en) * | 2009-04-29 | 2010-11-04 | Schwäbische Hüttenwerke Automotive GmbH | Circulating positive displacement pump with improved bearing lubrication |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107304765A (en) * | 2016-04-21 | 2017-10-31 | 施瓦本冶金工程汽车有限公司 | Include the rotary pump of lubrication groove in seal receptacle |
DE102016107447A1 (en) * | 2016-04-21 | 2017-11-09 | Schwäbische Hüttenwerke Automotive GmbH | Rotary pump with lubrication groove in the sealing bar |
US10578101B2 (en) | 2016-04-21 | 2020-03-03 | Schwäbische Hüttenwerke Automotive GmbH | Rotary pump comprising a lubricating groove in the sealing stay |
WO2018019587A1 (en) * | 2016-07-26 | 2018-02-01 | Robert Bosch Gmbh | External gear pump for a waste heat recovery system |
CN114320888A (en) * | 2021-11-10 | 2022-04-12 | 浙江环誉泵业科技有限公司 | Helical gear pump and method for eliminating axial force thereof |
CN114320888B (en) * | 2021-11-10 | 2024-06-11 | 浙江环誉泵业科技有限公司 | Oblique gear pump and method for eliminating axial force thereof |
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R012 | Request for examination validly filed | ||
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