EP1259734A1 - Kompaktes elektrohydraulisches motorpumpenaggregat - Google Patents
Kompaktes elektrohydraulisches motorpumpenaggregatInfo
- Publication number
- EP1259734A1 EP1259734A1 EP01902386A EP01902386A EP1259734A1 EP 1259734 A1 EP1259734 A1 EP 1259734A1 EP 01902386 A EP01902386 A EP 01902386A EP 01902386 A EP01902386 A EP 01902386A EP 1259734 A1 EP1259734 A1 EP 1259734A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- end part
- housing
- housing end
- support plate
- tube
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/02—Pumping installations or systems having reservoirs
- F04B23/021—Pumping installations or systems having reservoirs the pump being immersed in the reservoir
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/22—Arrangements for enabling ready assembly or disassembly
Definitions
- the invention is based on a compact electrohydraulic motor pump unit which has the features from the preamble of patent claim 1
- Such a motor pump unit is known from DE 299 06 881 1 ) 1.
- This unit has a housing which forms a reservoir for a pressure fluid and in which there is an electric motor.
- a middle housing part is tubular and is provided on one end face by a first housing cover or more generally expressed, closed by a first housing end part
- a second housing end part In front of the other end face of the housing part there is a second housing end part, which, however, in the known motor pump unit does not abut directly on the middle housing part.
- a support plate is located between the second housing end part and the middle housing part one of which a radial piston pump that can be driven via the motor shaft of the electric motor and a gear pump that is also driven are fastened.
- In the support plate there are channels through which the pumps can supply pressure fluid to two pressure connections on the outside of the support plate
- the interior of the housing between the middle housing part and the first housing end part, between ⁇ the middle housing part and the support plate and between the support plate and the second housing end part must be sealed all the way to the outside.
- This is disadvantageous, since with the number of sealing points and with the length of the seals increases the risk of leakage.
- great importance is placed on clean production halls and protecting the environment
- the object of the invention is therefore to develop a compact electrohydraulic motor pump unit with the features from the preamble of claim 1 in such a way that the number of sealing points between 5 individual housing parts is reduced.
- the pressure connection is on the outside of the second housing end part, that the second housing end part and the tubular housing middle part, sealing the inside of the housing to the outside, abut each other and that the support plate is located entirely inside the housing.
- I support plate lost its function as a housing part compared to the motor pump unit according to the prior art mentioned.
- the second housing end part lies directly against the middle part of the housing, so that only two circumferential sealing points of large diameter are still present. This significantly reduces the risk of leakage to the outside.
- the tube lies in the pressure flow path of the hydraulic fluid, in which pressure pulsations occur, due to which the tube could execute small axial movements due to the dimensional tolerances occurring in the dimensions of the components and on the tube itself.
- the tube is against the.
- a spring element which is clamped between the tube and one part of the two parts counterpart and second housing end part other part pressed.
- the spring element is advantageously clamped between an outer shoulder of the tube and the counterpart or the second housing end part.
- the spring element is formed by an O-ring in a particularly space-saving and cost-effective manner.
- a washer is inserted between this and the tube according to claim 8.
- Compact electrohydraulic motor pump units of essentially the same type of construction usually form an entire series with different sizes and different equipment.
- a length compensation disc is threaded onto the turned end of a tube. This is preferably located between the O-ring and the outer shoulder of the tube, so that it is held on the tube by the O-ring, which is pushed onto the tube with tension, before and during assembly of the tube.
- a pipe extends according to claim 11 between the support plate and the second housing end part or according to claim 12 between a connecting flange of the pump and the second housing end part.
- the latter is e.g. be the case if a gear or vane pump is arranged on the side of the support plate facing away from the electric motor and has a radially outgoing pressure outlet.
- the former will be the case especially when the pump is seated on the side of the support plate facing the electric motor.
- Compact electrohydraulic motor pump units are to be used flexibly with one pump or with two pumps which can deliver into different hydraulic circuits and adapted to the space available on a machine tool for which such units are mainly used. Therefore, according to claim 13, the second housing end part is provided with two pressure connections and two plug connections for a tube. If two pumps are driven by the electric motor, one can promote a pressure connection on the one hand and the other to the other pressure connection. The formation of the pressure flow paths is such that either the one pump or only the other pump delivers to a pressure connection due to another assembly. The parts can also be assembled in such a way that either one pressure connection or the other pressure connection is used with only one existing pump.
- the support plate te two plug connections for a tube, a tube extending between the one plug connection of the support plate and the one plug connection of the second housing end part and the other plug connection of the support plate being closed.
- a pump in the pressure flow path of which there are also channels in the support plate, can convey to one or the other pressure connection by selecting the corresponding plug connection on the support plate.
- An assembly of the support plate in different angular positions to the axis of the motor shaft would allow a promotion to a pressure connection or to the other pressure connection even with only one plug connection in the support plate and two plug connections in the second housing end part.
- the two plug connections in the housing end part should then be at the same distance from the axis of the motor shaft. This, in turn, does not always harmonize with the arrangement of the plug connections in the second housing end part that is necessary for the use of two pumps.
- FIG. 1 shows a longitudinal section through the first embodiment, in which several on the side of the support plate facing the electric motor
- FIG. 2 shows a longitudinal section through part of the assembly according to FIG. 1, the section running in another plane,
- FIGS. 1 and 2 show a variant of the unit according to FIGS. 1 and 2, in which the pressure connections with respect to the two pumps are interchanged in comparison with the embodiment according to FIGS. 1 and 2,
- FIG. 4 shows a plan view of the assembly according to FIGS. 1 and 2 or that according to FIG. 3, the position of the two pressure connections present being clear
- FIG. 5 shows a longitudinal section through a second exemplary embodiment, in which two gear pumps are arranged on the side of the support plate facing away from the electric motor,
- FIG. 6 shows a third exemplary embodiment in which a single gear pump is arranged on the side of the support plate facing away from the electric motor
- FIG. 7 shows a fourth embodiment with the delivery units of a first radial piston pump on the side of the support plate facing the electric motor and with the delivery units of a second radial piston pump between the support plate and the one housing cover and
- Figure 8 is a compact electrohydraulic motor pump unit without a support plate in the interior of the housing, in which several delivery units of a radial piston pump are attached to a housing cover, which is provided with an axial plug-in connection, so that it can be used in motor pump units according to versions 1 to 7 without substantial further processing to be able to.
- the electrohydraulic motor pump units shown have a housing 10 which on the one hand fulfills the function of the reservoir for a pressure fluid with which work is carried out and which can also be regarded as the housing of an electric motor 11.
- the main parts of this housing are NEN first housing cover 12, a second housing cover 13 and a middle housing part 14. This is a section of a profiled tube made of an aluminum alloy and has been machined. Retaining webs 15 run axially along the inside of the housing middle part 14 and are separated from the end faces.
- the housing cover 12 or 13 is centered with a centering collar 17 in a recess 16 on each end face of the middle housing part 14, in which the holding webs 15 are completely removed.
- a groove runs around the centering collar, into which a sealing ring 18 is fitted.
- the housing cover 12 is firmly connected to the housing center part 14 with individual small screws 19, which are screwed radially through 15 through the housing center part 14 into the centering collar 17.
- the drive shaft 23 of the electric motor 11 is rotatably mounted in the cover 12 via a ball bearing 22.
- the stator 26 of the electric motor 11 is pressed into the middle part of the housing.
- the second housing cover 13 is held on the housing middle part 14 by means of long tie rods 27, which extend axially between the 5 holding webs 15 and are screwed into inwardly projecting eyes of the centering collar 17 of the cover 13.
- the tie rods extend from the housing cover 13 to beyond the electric motor 11 and penetrate an annular disk 28 in individual bores, which is at a short distance from the first housing cover 12 on the shoulders of the retaining webs is on the hook.
- a screw nut 29 is screwed onto the end of each tie rod 27 projecting towards the cover 12 via the ring disk 28 and provided with a thread, and is firmly tightened against the ring disk 28.
- a support plate 35, 75 or 80 is located between the cover 13 and the electric motor 11 completely inside the housing 10, which rests on the shoulders 15 of the shoulders 15 which are formed by partially twisting off.
- the support plate is pressed against the shoulders of the holding webs 15 by a series of machine screws 36, which penetrate them from the side of the cover 13 and are screwed into threaded bores 37 of the holding webs 15, and is held stationary in the housing 10.
- a plurality of delivery units 41 of a radial piston pump 40 are fastened on the side of the support plate 35 facing the electric motor 11.
- the conveyor units are located axially between the support plate 35 and an annular disk 42, which is firmly connected to the support plate 35 via screws 43 which pass the conveyor units 41 laterally and guide the conveyor units laterally.
- the delivery units suck in pressure fluid from the interior of the housing 10 and discharge it via pressure valves 44 into a channel system of the support plate 35 which lies in a flow path to one of two connection bases 45 on the cover 13. From Figure 4 it can be seen that the two connection bases 45 are arranged at an angular distance of 90 ° on the cover 13.
- the pressure valves 44 essentially consist of a spherical closing body, a closing spring and a cylindrical housing, which is on the one hand in the support plate 35 and on the other hand in the cylinder of a conveyor unit 41 and thus contributes to the mounting of the conveyor units 41.
- the pistons 47 of the delivery units 41 are pressed by a spring 48 against an eccentric 49 of an eccentric shaft 50 which is inserted into the motor shaft 23 and is rotatably supported in a ball bearing 51 received by the support plate 35.
- an axial bore 52 opens into each of these channels, which starts from the side of the support plate 35 facing away from the conveying units 41, is provided with a thread on a narrower inner section, and an annular groove 53 for receiving a sealing ring 54 in an outer further section having.
- One of the two axial bores 52 is closed by a screw 55.
- a straight and axially extending tube 60 is inserted into the other axial bore 52 with an end portion turned away from the outside. This tube lies in the flow path that leads from the pressure valves 44 of the delivery units 41 to one of the two connection bases 45 on the cover 13. By lying in the groove 53
- a gear pump 65 is fastened, which has a pressure connection on the outside of its outer surface, onto which a connection flange 66 is screwed.
- This has a plug-in bore 67 which extends axially towards the cover 13 and is connected to the pressure connection of the gear pump 65 by means of bores within the connecting flange 66.
- the cover 13 has a second plug-in bore 61 which is connected via channels in the cover 13 to the pressure opening in the second connection base of the cover 13.
- a pipe 68 Extending between the second plug-in bore 61 and the plug-in bore 67 in the connecting flange 66 is a pipe 68 which, like the pipe 60, is straight and runs axially, has turned end sections, such as the pipe 60, from an O-ring 64 via disks 62 and 63 is pressed with an axial shoulder against the connecting flange 66 and is sealed in the plug holes.
- the delivery units 41 of the radial piston pump deliver pressure medium via the pressure valves 44, the channel system in the support plate 35, the tube 60 and a channel formed by one or more bores in the cover 13 to a connection base 45, which may be referred to as the first connection base.
- the gear pump 65 feeds via the connecting flange 66, the pipe 68 and a channel in the cover 13 to the second connecting flange 45. Hydraulic consumers located in two separate hydraulic circuits can thus be supplied with pressure medium with the compact unit. It may sometimes be desirable that with the same arrangement of the unit on a machine the radial piston pump to the second connection base and the gear pump to the first connection base.
- the second plug-in bore 52 is provided in the support plate 35.
- the plug-in bore 52 which is closed by the screw 55, is exactly aligned with the second plug-in bore 61 of the cover 13. It can therefore be easily the long tube 60 in the second plug-in bore of the support plate 35 and second insertion hole 61 of the cover 13 are inserted.
- the other plug bore 52 of the support plate 35 is then closed by a screw 55.
- connection flange 66 is used, in which the plug-in bore 67 is on the other side with respect to the pressure connection of the gear pump 65, as is clearly shown in FIG.
- the plug-in bore 67 is on the other side with respect to the pressure connection of the gear pump 65, as is clearly shown in FIG.
- no different parts are therefore necessary to produce the two variants either according to FIGS. 1 and 2 or according to FIG.
- two gear pumps 65 are driven via the drive shaft 23 of the electric motor 11, which are arranged axially one behind the other and fastened to a support plate 75 which, like the support plate 35 of the embodiment according to FIG. 1, is attached to the middle part 14 of the housing.
- the support plate 75 is thinner in the axial direction than the support plate 35 since it has neither channels for the pressure medium flow nor a receptacle for a bearing.
- the two covers 12 and 13, of which only the cover 13 is shown in FIG. 5, are the same as in the first exemplary embodiment.
- the middle part of the housing can have a different length compared to the first exemplary embodiment.
- the flow path from the pressure connection of the gear pump 65 closer to the cover 13 to the second connection base 45 of the cover 13 is identical to the corresponding flow path of the gear pump 65 of the first exemplary embodiment.
- the short tube 68 which is axially in a plug-in bore 67 of a connecting flange 66 and in the second plug-in bore 61 of the base 13.
- the connection flange 66 which has also been used for the variant of the first exemplary embodiment shown in FIG. 3, is fastened to the pressure connection of the gear pump 65 seated directly on the support plate 75.
- the plug bore 67 which is open towards the cover 13, lies on the other side of the pressure connection of the gear pump.
- Extending between the connecting flange and the first plug-in bore 61 of the cover 13 is a straight, long tube 60 which, just like in the first embodiment, is turned off at its ends and pressed against the connecting flange 66 by an O-ring 64 with the interposition of disks 62 and 63 becomes.
- the one gear pump 65 conveys to the first connection base and the other gear pump 65 to the second connection base 45 of the cover 13.
- the main difference between the exemplary embodiment according to FIG. 6 and that according to FIG. 5 is that it does not comprise two, but only one gear pump 65.
- the housing middle part 14 of the embodiment according to FIG. 6 is shorter than in the embodiment according to FIG. 5.
- the supporting plate is the same as in the embodiment according to FIG. 5 and as there and as in the embodiment according to FIG. 1, is fastened to the housing middle part 14 with screws 36.
- the gear pump 65 delivers via a connecting flange 66, a short axially extending and inserted pipe 68 and channels in the cover 13 to the first or second connecting base 45, depending on which connecting flange 66 is used.
- a screw plug is screwed into the pressure opening of the other connection base.
- FIG. 7 there is in turn a support plate 80 which is thicker than the two embodiments according to FIGS. 5 and 6 and in which a channel system for a pressure medium flow is present.
- delivery units 41 of a radial piston pump 40 are held on the side of the support plate 80 facing the motor 11 by means of an annular disk 42 and by means of screws 43.
- a single axial plug-in bore 52 opens into the channel system of the support plate 80 and contains an axially extending tube 81, which is turned off at both ends, and which has a small clearance between the support plate 80 and the cover 13 compared to the tubes 60 has to be bridged.
- the existing for the tube 81 in the base 13 axial plug-in bore 82 is provided with a thread in a section located in front of the end face of the tube 81 and opens into a bore 83 which is tilted slightly out of the plane of the cover 13 and which becomes one of two - closing sock in 45 leads.
- the tube 81 is also pressed against the support plate 80 by an O-ring 64 with the interposition of a disc 63.
- the support plate 80 is not held on the middle part 14 of the housing, but rather with the interposition of several delivery units 41 of a second radial piston pump 85 with the aid of machine screws 36 on the cover 13.
- the conveyor units 41 are clamped between the cover 13 and the support plate 80. In addition, they are secured by threaded bolts 86 screwed into the cover 13 and leading laterally.
- the housings 46 of the pressure valves 44 of the delivery units 41 of the second radial piston pump 85 naturally also contribute to holding the delivery units.
- the delivery units of the second radial piston pump 85 deliver pressure medium into a channel system of the cover 13, which includes a bore, not shown, which leads to the second connection base 45, also not shown.
- a plurality of delivery units 41 of a radial piston pump 85 are provided with the aid of an annular disk 42 and with the aid of
- the cover 13 is identical to the cover of the embodiment according to FIG. 7. However, a screw plug 89 is screwed into the threaded section of the axial plug-in hole 82, while the screw
- the conveying units 41 thus convey via the bore 83 to the pressure opening 88 of the one connection base 45.
- the locking screw 89 prevents a short circuit to the inside of the housing 10.
- the inventive idea is thus also expressed in the unit according to FIG. 8, regardless of the specific equipment of a hydraulic one Compact unit to provide the pressure connection for the one or more pumps each in the cover 13.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
- Rotary Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10009587 | 2000-02-29 | ||
DE10009587A DE10009587A1 (de) | 2000-02-29 | 2000-02-29 | Kompaktes elektrohydraulisches Motorpumpenaggregat |
PCT/EP2001/001111 WO2001065115A1 (de) | 2000-02-29 | 2001-02-02 | Kompaktes elektrohydraulisches motorpumpenaggregat |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1259734A1 true EP1259734A1 (de) | 2002-11-27 |
EP1259734B1 EP1259734B1 (de) | 2006-03-22 |
Family
ID=7632866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01902386A Expired - Lifetime EP1259734B1 (de) | 2000-02-29 | 2001-02-02 | Kompaktes elektrohydraulisches motorpumpenaggregat |
Country Status (4)
Country | Link |
---|---|
US (1) | US6746218B2 (de) |
EP (1) | EP1259734B1 (de) |
DE (2) | DE10009587A1 (de) |
WO (1) | WO2001065115A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008054269A1 (de) * | 2007-11-27 | 2009-05-28 | Robert Bosch Gmbh | Elektrohydraulisches Motorpumpenaggregat |
US8206134B2 (en) * | 2008-06-02 | 2012-06-26 | Maradyne Corporation | Combined power pack unit |
DE102011018387B4 (de) * | 2011-04-18 | 2016-01-07 | Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg | Druckquelle und Vorrichtung zur elektrofluidischen Versorgung oder Betätigung eines Bauteils eines Kraftfahrzeugantriebsstranges |
DE102015219091A1 (de) * | 2015-10-02 | 2017-04-06 | Robert Bosch Gmbh | Elektrohydraulisches Kompaktaggregat |
DE102015219204A1 (de) * | 2015-10-05 | 2017-04-06 | Zf Friedrichshafen Ag | Mehrfachpumpe und Getriebe |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3126030A (en) * | 1964-03-24 | F stoermer | ||
DE2413691B2 (de) * | 1974-03-21 | 1976-04-29 | Druckoelpumpe | |
ZA834713B (en) | 1982-07-13 | 1984-03-28 | Karl Sauder | Axial-piston rump |
DE3312828A1 (de) * | 1983-04-09 | 1984-10-11 | Flutec Fluidtechnische Geräte GmbH, 6603 Sulzbach | Vorrichtung zum foerdern eines druckmittels, insbesondere oel |
DE3344197A1 (de) * | 1983-12-07 | 1985-06-13 | Blum, Albert, 5204 Lohmar | Pumpenaggregat |
DE3839689C2 (de) * | 1988-11-24 | 1998-03-19 | Rudolf Pickel | Baukastenartig aufbaubares, elektromotorisch angetriebenes hydraulisches Pumpenaggregat |
DE4120665A1 (de) * | 1991-06-22 | 1992-12-24 | Teves Gmbh Alfred | Elektromotorisch angetriebene hydraulikpumpe |
US5173039A (en) | 1991-09-27 | 1992-12-22 | Cook James E | Double acting simplex plunger pump |
US5466131A (en) * | 1994-03-22 | 1995-11-14 | Micropump Corporation | Multiple-chamber gear pump with hydraulically connected chambers |
DE29519941U1 (de) * | 1995-12-15 | 1997-04-17 | Wagner, Paul-Heinz, 53804 Much | Hydraulisches Pumpenaggregat |
DE29609701U1 (de) * | 1996-05-31 | 1996-08-22 | Heilmeier & Weinlein Fabrik für Oel-Hydraulik GmbH & Co KG, 81673 München | Elektrohydraulisches Motorpumpenaggregat |
DE29809935U1 (de) | 1998-06-03 | 1998-10-08 | Heilmeier & Weinlein Fabrik für Oel-Hydraulik GmbH & Co KG, 81673 München | Hydraulisches Motor-Pumpenaggregat |
FR2789446B1 (fr) * | 1999-02-04 | 2002-03-08 | Hydroperfect Internat Hpi | Pompe hydraulique du type a engrenage et groupe electro-pompe equipe d'une telle pompe |
DE29906881U1 (de) * | 1999-04-16 | 1999-07-01 | Heilmeier & Weinlein | Elektrohydraulisches Motorpumpenaggregat |
-
2000
- 2000-02-29 DE DE10009587A patent/DE10009587A1/de not_active Withdrawn
-
2001
- 2001-02-02 US US10/220,163 patent/US6746218B2/en not_active Expired - Lifetime
- 2001-02-02 WO PCT/EP2001/001111 patent/WO2001065115A1/de active IP Right Grant
- 2001-02-02 EP EP01902386A patent/EP1259734B1/de not_active Expired - Lifetime
- 2001-02-02 DE DE50109286T patent/DE50109286D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0165115A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE10009587A1 (de) | 2001-08-30 |
US6746218B2 (en) | 2004-06-08 |
WO2001065115A1 (de) | 2001-09-07 |
EP1259734B1 (de) | 2006-03-22 |
US20030077188A1 (en) | 2003-04-24 |
DE50109286D1 (de) | 2006-05-11 |
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