DE102012005958A1 - External hydraulic gear machine has bearing bushes whose inner walls are elastically deformable in region of low pressure terminal on axially adjacent regions of gears - Google Patents
External hydraulic gear machine has bearing bushes whose inner walls are elastically deformable in region of low pressure terminal on axially adjacent regions of gears Download PDFInfo
- Publication number
- DE102012005958A1 DE102012005958A1 DE201210005958 DE102012005958A DE102012005958A1 DE 102012005958 A1 DE102012005958 A1 DE 102012005958A1 DE 201210005958 DE201210005958 DE 201210005958 DE 102012005958 A DE102012005958 A DE 102012005958A DE 102012005958 A1 DE102012005958 A1 DE 102012005958A1
- Authority
- DE
- Germany
- Prior art keywords
- gears
- region
- inner walls
- bearing bushes
- gear machine
- 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- Withdrawn
Links
- 239000000463 material Substances 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims abstract description 3
- 238000003801 milling Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
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
- F04C2/12—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
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- 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
- F04C15/0023—Axial sealings for working fluid
- F04C15/0026—Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type machines or pumps, e.g. gear machines or pumps
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- 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
- F04C2240/56—Bearing bushings or details thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine hydraulische Außenzahnradmaschine mit einem Gehäuse in dessen Gehäuseinnenraum zwei im Außeneingriff miteinander kämmende Zahnräder angeordnet sind, die fest auf axial beidseitig hervorstehenden Lagerwellen angeordnet sind, welche jeweils beidseitig über Lagerbuchsen in dem Gehäuse drehbar gelagert sind, wobei eine der Lagerwellen aus dem Gehäuse herausgeführt ist und eine An- oder Abtriebswelle bildet und wobei die Zahnräder im Bereich ihrer Verzahnungen axial in dichtender Anlage an Innenwänden der Lagerbuchsen sind, mit einem von außen zum Eingriffsbereich der Zahnräder führenden Druckanschluss und einem von außen zum Eingriffsbereich der Zahnräder führenden Niederdruckanschluss.The invention relates to a hydraulic external gear machine with a housing in the housing interior two externally meshing with each other meshing gears are arranged, which are fixedly mounted on axially on both sides projecting bearing shafts, which are rotatably supported on both sides via bushings in the housing, wherein one of the bearing shafts led out of the housing and forms a drive or output shaft and wherein the gears are axially in sealing engagement with inner walls of the bearing bushes in the region of their teeth, with a leading from the outside to the engagement region of the gears pressure port and a leading from the outside to the engagement region of the gears low pressure port.
Bei derartigen Außenzahnradmaschinen werden die Lagerbuchsen vom Druck in Bereich des Druckanschlusses beaufschlagt und im Umfang der Herstellungstoleranzen von den Zahnrädern weg gedrückt. Dies führt auf der Seite des Niederdruckanschlusses zu einer Bewegung der Lagerbuchsen zu den Zahnrädern hin, wodurch die Zahnräder mit erhöhter Flächenpressung an den Lagerbuchsen im Bereich des Niederdruckanschlusses anliegen und dort zu einem erhöhten Verschleiß führen.In such external gear machines, the bearing bushes are acted upon by the pressure in the region of the pressure port and pushed away from the gears in the scope of the manufacturing tolerances. This leads to a movement of the bearing bushes on the side of the low-pressure connection to the gears, whereby the gears abut with increased surface pressure on the bearing bushes in the region of the low-pressure connection and there lead to increased wear.
Dies wird zusätzlich dadurch unterstützt, dass sich durch den Druck im Bereich des Druckanschlusses auch das Gehäuse geringfügig elastisch aufbauchend verformt, was zu einer entgegengesetzten elastischen Verformung des Gehäuses im Bereich des Niederdruckanschlusses führt.This is additionally supported by the fact that the housing deforms slightly elastically bulging due to the pressure in the region of the pressure connection, which leads to an opposite elastic deformation of the housing in the region of the low-pressure connection.
Aufgabe der Erfindung ist es daher eine Außenzahnradmaschine der eingangs genannten Art zu schaffen, die auf einfache Weise diese Nachteile und einen erhöhten Verschleiß der Lagerbuchsen im Bereich des Niederdruckanschlusses zumindest weitgehend vermeidet.The object of the invention is therefore to provide an external gear machine of the aforementioned type, which avoids these disadvantages and increased wear of the bearing bushes in the region of the low-pressure connection in a simple manner, at least largely.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die im Bereich des Niederdruckanschlusses an den Zahnrädern axial anliegenden Bereiche der Innenwände der Lagerbuchsen elastisch verformbar ausgebildet sind.This object is achieved in that the axially adjacent in the region of the low-pressure connection areas of the inner walls of the bearing bushes are formed elastically deformable.
Werden die Lagerbuchsen vom Druck in Bereich des Druckanschlusses beaufschlagt und im Umfang der Herstellungstoleranzen von den Zahnrädern weg gedrückt, so führt das zwar weiterhin auf der Seite des Niederdruckanschlusses zu einer Bewegung der Lagerbuchsen zu den Zahnrädern hin. Da aber die im Bereich des Niederdruckanschlusses an den Zahnrädern anliegenden Bereiche der Innenwände der Lagerbuchsen elastisch verformbar ausgebildet sind, können sie axial so weit ausweichen, dass sie im wesentlichen mit keiner erhöhten Flächenpressung mehr an den Lagerbuchsen anliegen, so dass es dort zu keinem erhöhten Verschleiß mehr kommt.If the bearing bushes are acted upon by the pressure in the region of the pressure connection and pressed away from the gears by the extent of the manufacturing tolerances, this still leads, on the side of the low-pressure connection, to a movement of the bearing bushes towards the gear wheels. However, since the areas of the inner walls of the bearing bushes lying in the region of the low-pressure connection are elastically deformable, they can deflect axially so far that they essentially bear against the bearing bushes with no increased surface pressure, so that there is no increased wear there more is coming.
Die Standzeit solcher Außenzahnradmaschinen und damit deren wirtschaftlicher Betrieb werden damit erheblich erhöht.The life of such external gear machines and thus their economic operation are thus significantly increased.
Zusätzliche Bauteile, die die Baugröße und die Kosten der Außenzahnradmaschine erhöhen würden, werden vermieden.Additional components that would increase the size and cost of the external gear machine are avoided.
Die Erfindung Ist unabhängig davon, ob die Außenzahnradmaschine als Pumpe oder als Motor betrieben wird, in gleicher Weise vorteilhaft anwendbar.The invention is equally applicable regardless of whether the external gear machine is operated as a pump or as a motor.
Die Lagerbuchsen können im Bereich des Niederdruckanschlusses an dem den Zahnrädern anliegenden Bereich aus einem elastisch verformbaren Material bestehen.The bearing bushes may consist of an elastically deformable material in the region of the low-pressure connection on the region adjacent to the toothed wheels.
Vorteilhaft ist es aber, wenn die Innenwände der Lagerbuchsen im Bereich des Niederdruckanschlusses axial elastisch auslenkbar sind.It is advantageous, however, if the inner walls of the bearing bushes are axially elastically deflectable in the region of the low-pressure connection.
Dies wird auf besonders einfache Weise dadurch erreicht, dass die Lagerbuchsen im Bereich des Niederdruckanschlusses sich parallel zu ihren Innenwänden erstreckende Schlitze aufweisen und die zwischen den Innenwänden im Bereich des Niederdruckanschlusses und den Schlitzen gebildeten Wände der Lagerbuchsen annähernd axial elastisch auslenkbar sind.This is achieved in a particularly simple manner in that the bearing bushes in the region of the low-pressure connection have slits extending parallel to their inner walls and the walls of the bearing bushes formed between the inner walls in the region of the low-pressure connection and the slots are approximately axially elastically deflectable.
Besonders einfach herstellbar ist es, wenn die Schlitze Einfräsungen in den Lagerbuchsen sind.It is particularly easy to produce when the slots are milled in the bushings.
Dazu muss nur mit einem Scheibenfräser ein Einstich in die Lagerbuchsen parallel zu deren Innenwänden erfolgen.For this purpose, a recess must be made in the bearing bushes parallel to their inner walls only with a disc milling cutter.
Die Lagerbuchsen können für jede Lagerung separate Lagerbuchsen sein.The bushings can be separate bearing bushes for each bearing.
Es ist aber auch möglich, dass jeweils die Lagerbuchsen axial auf einer Seite der Zahnräder brillenartig einen einteiligen Lagerkörper bilden.But it is also possible that in each case the bearing bushes form a one-piece bearing body in an eyeglass-like manner axially on one side of the gears.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im Folgenden näher beschrieben. Es zeigenAn embodiment of the invention is illustrated in the drawing and will be described in more detail below. Show it
Die dargestellte hydraulische Außenzahnradpumpe besitzt ein Gehäuse
Das eine Ende der Antriebswelle
Das zweite Zahnrad
Die Lagerbuchsen
Die Lagerbuchsen
Die Zahnräder
Wird die Außenzahnradpumpe durch Drehantrieb der Antriebswelle
Die Lagerbuchsen
Im Betrieb der Außenzahnradpumpe werden die Lagerbuchsen
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210005958 DE102012005958A1 (en) | 2012-03-23 | 2012-03-23 | External hydraulic gear machine has bearing bushes whose inner walls are elastically deformable in region of low pressure terminal on axially adjacent regions of gears |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210005958 DE102012005958A1 (en) | 2012-03-23 | 2012-03-23 | External hydraulic gear machine has bearing bushes whose inner walls are elastically deformable in region of low pressure terminal on axially adjacent regions of gears |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102012005958A1 true DE102012005958A1 (en) | 2013-09-26 |
Family
ID=49111962
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE201210005958 Withdrawn DE102012005958A1 (en) | 2012-03-23 | 2012-03-23 | External hydraulic gear machine has bearing bushes whose inner walls are elastically deformable in region of low pressure terminal on axially adjacent regions of gears |
Country Status (1)
Country | Link |
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DE (1) | DE102012005958A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016214762A1 (en) | 2016-08-09 | 2018-02-15 | Robert Bosch Gmbh | External gear unit |
DE102016214823A1 (en) | 2016-08-10 | 2018-02-15 | Robert Bosch Gmbh | External gear unit |
-
2012
- 2012-03-23 DE DE201210005958 patent/DE102012005958A1/en not_active Withdrawn
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016214762A1 (en) | 2016-08-09 | 2018-02-15 | Robert Bosch Gmbh | External gear unit |
WO2018028916A1 (en) | 2016-08-09 | 2018-02-15 | Robert Bosch Gmbh | External gear machine |
DE102016214823A1 (en) | 2016-08-10 | 2018-02-15 | Robert Bosch Gmbh | External gear unit |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R012 | Request for examination validly filed | ||
R016 | Response to examination communication | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |