EP1864019B1 - Hydraulikaggregat - Google Patents
Hydraulikaggregat Download PDFInfo
- Publication number
- EP1864019B1 EP1864019B1 EP06708810A EP06708810A EP1864019B1 EP 1864019 B1 EP1864019 B1 EP 1864019B1 EP 06708810 A EP06708810 A EP 06708810A EP 06708810 A EP06708810 A EP 06708810A EP 1864019 B1 EP1864019 B1 EP 1864019B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reservoir
- housing
- hydraulic unit
- unit according
- oil
- 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.)
- Active
Links
- 238000001816 cooling Methods 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 23
- 125000006850 spacer group Chemical group 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012780 transparent material 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
- 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
Definitions
- the invention relates to a hydraulic unit with an oil-containing reservoir containing a motor and a pump driven by the motor.
- a hydraulic unit has as a pressure generator to a pump, which sucks oil from a reservoir and feeds a consumer. From the consumer, a return line leads back to the reservoir.
- hydraulic units containing the motor as a submersible motor, which is arranged in the reservoir and immersed in the hydraulic fluid. The heat generated in the engine is dissipated by the hydraulic oil.
- WO 03/087576 A1 (Related Art) is a hydraulic pump, in particular for a power steering system, described having an oil-filled reservoir in which a motor and a pump are arranged immersed. At the top of the reservoir lid is a filler neck through which the reservoir is filled. The filler neck is made of a transparent material, so that the filling level is clearly visible.
- the invention has for its object to provide a hydraulic unit, which is able to provide defined variable volume flows, without the risk of suction of air arises.
- the hydraulic unit according to the present invention is characterized by claim 1. It contains a multi-piston pump of distributed individual pumps, wherein the reservoir is connected to an at least partially filled with oil Hilfr-reservoir, which refills the reservoir in case of oil drainage through the multi-piston pump and thereby a complete immersion of the multiple Ensures piston pump.
- a Mchrfach piston pump is a Ver-drängerpumpe, which provides a continuous flow rate, which can be varied by changing the speed. If the motor is a synchronous motor, it is possible to change the size of the volume flow with a corresponding motor control depending on the load of the respective consumer.
- a Mehrfacfi piston pump in which the individual pumps are distributed in the reservoir there is a risk that at a drop in the oil level of the suction inlet of at least a single pump is temporarily no longer submerged and thereby sucked air. To achieve a defined volume flow this must be prevented.
- the auxiliary reservoir ensures that, with a momentarily high removal of oil from the reservoir, a refilling of the reservoir takes place, so that a complete immersion of the multiple piston pump is ensured.
- the hydraulic unit according to the invention is particularly suitable for those cases in which consumers are connected with different absorption capacity. If a consumer is a hydraulic power wrench for turning screws, the load due to hydraulic pressure is too high is normally high, so that the delivery rate or the volume flow is small. The situation is different when a connected consumer is, for example, a piston-cylinder unit whose large-volume cylinder contains a piston which is moved against a small load. This results in a fast piston movement with the result of a large volume flow. The large volume flow causes a change in the oil level in the reservoir, it may happen that the upper individual pumps are temporarily no longer immersed. Such a condition is prevented by the auxiliary reservoir.
- the invention is advantageously applicable to a hydraulic power unit in which the reservoir has a cross-sectional shape in which the width of the reservoir decreases towards the upper end.
- a cross-sectional shape results, for example, in a reservoir which has a substantially round cross-section.
- Such a reservoir favors a space-saving housing of motor and pump. It results in a hydraulic unit of small volume and low weight, so that the hydraulic unit can be designed as a portable unit.
- there is the danger that in the upwardly narrowing cross-section of the upper region, which has a small volume would drain quickly with strong oil extraction without the action of the auxiliary reservoir.
- the auxiliary reservoir may be located on top of the reservoir, either as an additional container or as a cavity fixedly connected to the reservoir, but of greater width than the upper end of the reservoir.
- the auxiliary reservoir above the oil level is hermetically sealed and a connecting line connects the auxiliary reservoir below the oil level with a ventilated additional tank.
- the auxiliary reservoir and the additional tank form communicating system.
- the atmospheric pressure drives oil from the aerated additional tank into the auxiliary reservoir as soon as oil is removed from the reservoir from the auxiliary reservoir.
- the additional tank increases the volume of the auxiliary reservoir, but on the other hand also spatially separated from the auxiliary reservoir.
- the auxiliary reservoir is located above the reservoir, the auxiliary tank may be mounted below the reservoir. The additional tank can thus form a base for the housing of the reservoir.
- the auxiliary reservoir can alternatively be used without an additional tank. In this case, a vent above the maximum oil level is required so that oil extraction from the reservoir is not affected.
- the hydraulic unit has according to FIG. 1 , a housing 10, which is a common motor housing of an electric motor.
- the housing 10 has a cylindrical inner wall 11 and has on its outer side numerous longitudinal ribs 12, which form cooling fins.
- the housing 10 forms a profile body made of an extruded profile. It is provided at one point of its circumference with an integrally formed longitudinal mounting plate 13 and on the diametrically opposite side is a mounting profile 14 for attachment of components to the housing.
- the housing 10 contains the electric motor 15. This consists of a stator 16 and a rotor 17.
- the motor is a permanent magnet-excited synchronous motor whose stator has a rotating field-generating stator winding 18.
- the rotor 17 consists of the motor shaft 19 and permanent magnets 20 attached thereto.
- the motor shaft 19 is mounted in bearings 21, 22 in the end walls (not shown) of the housing 10.
- the stator winding 18 is enclosed with a hoop 25, which forms a closed ring and surrounds the coil winding.
- spacers 26 are fixed, which protrude radially inward and keep the hoop 25 centered in the housing. In this way, the stator 16 is centered in the housing.
- the spacers 26 are strips which extend in the longitudinal direction of the housing. At least three such strips are provided, but in the present embodiment 4.
- the spacers 26 are shorter than the axial length of the space 27, so that they do not hinder the circulation of the hydraulic oil in the space 27.
- the spacers 26 it is achieved that between the stator 16 and the inner surface 11 of the housing, the annular space 27 is present, which forms the main part of the volume of a reservoir 28.
- the reservoir is limited by the housing 10.
- the stator 16 and the rotor 17 are immersed in the hydraulic fluid.
- the motor shaft 19 of the motor 15 has an eccentric ring 29 which drives a pump.
- the pump is a multi-piston pump of a plurality of individual pumps, which are arranged in a star shape around the motor shaft 19 around, and whose pistons are driven by the eccentric ring 29 which is eccentrically fixed to the motor shaft.
- Each of the individual pumps sucks in oil from the reservoir via a non-return valve and delivers it via another check valve to the pump outlet.
- the multi-piston pump is a volumetric pump.
- a fan 30 which has a housing 31 which projects radially beyond the housing 10.
- a fan wheel which generates an air flow 32 along the ribs 12.
- the fan is connected to the motor shaft 19 and is driven by this. Because of the effective heat dissipation results in a good cooling. Due to the low heating of the hydraulic unit also increases the efficiency. Due to the omission of a separate motor housing, the hydraulic unit is of compact design and of low weight.
- FIG. 2 is the entire hydraulic unit shown. It can be seen the housing 10 with the longitudinal ribs 12. At one end there is the fan 30, which drives an air flow along the outside of the housing. At the opposite end of the housing is the pump part 40 with the pressure port 41 and the return port 42 on the front side. Further, there is a manometer 43 attached, which indicates the pressure.
- auxiliary tank 45 Under the housing 10 of the reservoir, an auxiliary tank 45 is mounted, which consists of a closed box, which is provided with a nozzle 46 for ventilation and filling of Hydr-auliköl.
- an auxiliary reservoir 47 is mounted, which is connected to the additional tank 45 via a connecting line 48.
- the motor controller 50 On the auxiliary reservoir is located in a housing, the motor controller 50. This is connected to (not shown) electrical lines to the electric motor 15.
- the pressure at the pressure port 41 is determined by a (not shown) pressure sensor. This pressure is a measure of the load of the connected consumer.
- the engine controller 50 controls the electric motor 15 to reduce the engine speed at higher pressure. As soon as the pressure decreases, the engine speed increases again. In this way it is achieved that the power absorbed by the engine remains substantially constant and is largely independent of the respective load state of the consumer.
- FIG. 3 shows a schematic representation of the arranged in the space 27 multiple-piston pump 60, which consists of several star-shaped arranged individual pumps 61.
- Each of the individual pumps 61 is a piston pump whose piston rod 62 is pressed against the circumference of the eccentric ring 29 by a spring (not shown).
- the piston rods 62 are cyclically actuated by the eccentric ring 29.
- Each of the individual pumps 61 has an inlet and an outlet (not shown).
- the outlets are connected to each other and guided to the pressure port 41.
- the inlets are openings through which oil from the reservoir 28 is sucked into the single pump.
- the oil that is supplied to the load connected to the hydraulic unit is removed from the reservoir 28. Due to the round shape of the housing 10, a decrease in oil leads to a rapid drop in level. As a result, it could happen that the inlets of the upper individual pumps 61 are no longer submerged. This is avoided by the auxiliary reservoir 47.
- the auxiliary reservoir 47 has, as out FIG. 3 It can be seen, a width which is greater than that of the upper end of the reservoir 28. It is filled up to a level 65 with oil. Above the level 65, the auxiliary reservoir 47 is hermetically sealed, so that an enclosed air cushion 66 is formed. The lower end of the auxiliary reservoir 47 is connected via a passage 67 to the space 27. The auxiliary reservoir 47 thus provides unthrottled oil for refilling the reservoir 28.
- the connecting line 48 connects the additional tank 45 with the auxiliary reservoir 47. It leads below the level 65 into the auxiliary reservoir.
- the connecting line is designed as a dip tube that ends just above the ground. If a negative pressure is created in the auxiliary reservoir 47 by the multiple piston pump 60, oil is forced up from the additional tank 45 through the connecting line 48. This is done by the Atmosphärcndrucfc, which enters through the nozzle 46 in the additional tank. In this way, a very large amount of oil for refilling the reservoir 28 is available.
- auxiliary reservoir 47 it is also possible to operate the auxiliary reservoir 47 without the additional tank 45. In this case, aeration of the auxiliary reservoir is required.
- FIG. 4 shows that at the auxiliary reservoir 47, a sight glass 68 is provided, through which the level can be inspected to determine a proper operation of the auxiliary reservoir.
- a motor control 50 is mounted above the auxiliary reservoir 47. This consists of the required electrical components, which are not shown here.
- the motor controller 50 has on its underside a plate 70 with numerous longitudinal cooling ribs 71.
- the cooling fins 71 cover that part of the housing 10 which is from the auxiliary reservoir 47 is released.
- the engine controller 50 is cantilevered over the auxiliary reservoir 47 via.
- the cooling fins 71 are surrounded by an air guide housing 72 having a plurality of openings with fans 73 which blow cooling air into the air guide housing. Through openings 74, the cooling air exits.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Transplanting Machines (AREA)
- Fluid-Pressure Circuits (AREA)
- Reciprocating Pumps (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Lubricants (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL06708810T PL1864019T3 (pl) | 2005-04-01 | 2006-03-23 | Agregat hydrauliczny |
DK11173668.2T DK2385252T3 (da) | 2005-04-01 | 2006-03-23 | Hydraulikaggregat |
EP11173668.2A EP2385252B2 (de) | 2005-04-01 | 2006-03-23 | Hydraulikaggregat |
PL11173668T PL2385252T3 (pl) | 2005-04-01 | 2006-03-23 | Agregat hydrauliczny |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202005005165U DE202005005165U1 (de) | 2005-04-01 | 2005-04-01 | Hydraulikaggregat |
PCT/EP2006/061014 WO2006103199A1 (de) | 2005-04-01 | 2006-03-23 | Hydraulikaggregat |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11173668.2A Division EP2385252B2 (de) | 2005-04-01 | 2006-03-23 | Hydraulikaggregat |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1864019A1 EP1864019A1 (de) | 2007-12-12 |
EP1864019B1 true EP1864019B1 (de) | 2011-08-03 |
Family
ID=36283033
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11173668.2A Active EP2385252B2 (de) | 2005-04-01 | 2006-03-23 | Hydraulikaggregat |
EP06708810A Active EP1864019B1 (de) | 2005-04-01 | 2006-03-23 | Hydraulikaggregat |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11173668.2A Active EP2385252B2 (de) | 2005-04-01 | 2006-03-23 | Hydraulikaggregat |
Country Status (9)
Country | Link |
---|---|
US (1) | US8220380B2 (es) |
EP (2) | EP2385252B2 (es) |
JP (1) | JP4608575B2 (es) |
AT (1) | ATE519034T1 (es) |
DE (1) | DE202005005165U1 (es) |
DK (2) | DK2385252T3 (es) |
ES (2) | ES2369281T3 (es) |
PL (2) | PL1864019T3 (es) |
WO (1) | WO2006103199A1 (es) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202007001537U1 (de) * | 2007-02-02 | 2008-06-19 | Wagner, Paul-Heinz | Hydraulikaggregat für hydraulische Kraftschrauben |
DE102009009958A1 (de) * | 2009-02-23 | 2010-09-02 | Hanning Elektro-Werke Gmbh & Co. Kg | Zentrifuge |
DE102013002187A1 (de) * | 2013-02-06 | 2014-08-07 | Juko Technik Gmbh | Hydraulisches Pumpenaggregat |
US20150275891A1 (en) * | 2014-03-31 | 2015-10-01 | Schlumberger Technology Corporation | Integrated motor and pump assembly |
DE102014116242A1 (de) | 2014-11-07 | 2016-05-12 | Uts Biogastechnik Gmbh | Rühreinrichtung für einen Fermenter einer Biogasanlage |
US11415119B2 (en) * | 2017-05-16 | 2022-08-16 | Enerpac Tool Group Corp. | Hydraulic pump |
US11958177B2 (en) | 2018-09-07 | 2024-04-16 | Milwaukee Electric Tool Corporation | Hydraulic piston pump for a hydraulic tool |
EP3653888B1 (en) | 2018-11-13 | 2023-01-25 | Enerpac Tool Group Corp. | Hydraulic power system and method for controlling same |
DE102024104149A1 (de) * | 2023-03-08 | 2024-09-12 | Sew-Eurodrive Gmbh & Co Kg | Elektromotor mit Statorgehäuse |
Family Cites Families (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5615428Y2 (es) * | 1978-06-10 | 1981-04-10 | ||
JPS5617402U (es) * | 1979-07-19 | 1981-02-16 | ||
FR2463298A1 (fr) * | 1979-08-16 | 1981-02-20 | Proprietaires Reunis | Procede et dispositif d'aspiration par le vide de matieres boueuses avec, apres decantation, refoulement d'eau continu par pompe immergee |
JPS5659301U (es) * | 1979-10-11 | 1981-05-21 | ||
JPS60558B2 (ja) * | 1980-01-08 | 1985-01-08 | 株式会社極東機械製作所 | 水槽付ポンプ |
JPS6088886A (ja) * | 1983-10-21 | 1985-05-18 | Hitachi Ltd | 燃料供給ポンプ |
US4568253A (en) * | 1983-11-29 | 1986-02-04 | Tecumseh Products Company | Horizontal shaft oil pump |
JPS6111471A (ja) * | 1984-06-25 | 1986-01-18 | Nippon Denso Co Ltd | ラジアルプランジヤポンプ |
US4627793A (en) † | 1984-06-13 | 1986-12-09 | Nippondenso Co., Ltd. | Motor-driven radial plunger pump |
JPH0250192U (es) * | 1988-10-04 | 1990-04-09 | ||
JPH0374157A (ja) * | 1989-08-10 | 1991-03-28 | Daikin Ind Ltd | 油圧パワーユニット |
DE3928950A1 (de) † | 1989-08-31 | 1991-03-14 | Wagner Gmbh J | Membranpumpe |
JP2687822B2 (ja) † | 1992-08-06 | 1997-12-08 | ダイキン工業株式会社 | 流体圧力発生装置 |
DE4231785A1 (de) † | 1992-09-23 | 1994-03-24 | Teves Gmbh Alfred | Radialkolbenpumpe mit integriertem Resonator |
IT1275518B (it) * | 1995-07-12 | 1997-08-07 | Faip Off Mecc | Pompa per acqua ad alta pressione a doppio isolamento |
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 |
US6078118A (en) * | 1996-08-03 | 2000-06-20 | Itt Manufacturing Enterprises Inc. | Electric motor-pump assembly |
DE29802441U1 (de) * | 1998-02-12 | 1998-05-07 | Heilmeier & Weinlein Fabrik für Oel-Hydraulik GmbH & Co KG, 81673 München | Hydraulisches Motorpumpenaggregat |
DE29809935U1 (de) † | 1998-06-03 | 1998-10-08 | Heilmeier & Weinlein Fabrik für Oel-Hydraulik GmbH & Co KG, 81673 München | Hydraulisches Motor-Pumpenaggregat |
DE19859340C2 (de) * | 1998-12-22 | 2003-02-06 | Siemens Ag | Elektrohydraulische Einheit |
DE29906881U1 (de) † | 1999-04-16 | 1999-07-01 | Heilmeier & Weinlein | Elektrohydraulisches Motorpumpenaggregat |
JP4493061B2 (ja) * | 1999-04-22 | 2010-06-30 | 油研工業株式会社 | 電動機内蔵油圧ポンプ |
DE20007554U1 (de) * | 2000-04-26 | 2000-08-10 | Heilmeier & Weinlein Fabrik für Oel-Hydraulik GmbH & Co KG, 81673 München | Motor-Pumpenaggregat |
DE20205936U1 (de) * | 2002-04-16 | 2002-08-22 | TRW Fahrwerksysteme GmbH & Co. KG, 40547 Düsseldorf | Hydraulikpumpe, insbesondere für ein Servolenksystem |
JP4300088B2 (ja) * | 2003-09-29 | 2009-07-22 | 日機装株式会社 | サブマージドポンプ |
US7182583B2 (en) * | 2004-02-06 | 2007-02-27 | Sauer-Danfoss Inc. | Electro-hydraulic power unit with a rotary cam hydraulic power unit |
DE202004006109U1 (de) † | 2004-04-17 | 2004-06-17 | Wagner, Paul-Heinz | Hydraulikaggregat |
-
2005
- 2005-04-01 DE DE202005005165U patent/DE202005005165U1/de not_active Expired - Lifetime
-
2006
- 2006-03-23 WO PCT/EP2006/061014 patent/WO2006103199A1/de active Application Filing
- 2006-03-23 ES ES06708810T patent/ES2369281T3/es active Active
- 2006-03-23 DK DK11173668.2T patent/DK2385252T3/da active
- 2006-03-23 PL PL06708810T patent/PL1864019T3/pl unknown
- 2006-03-23 EP EP11173668.2A patent/EP2385252B2/de active Active
- 2006-03-23 DK DK06708810.4T patent/DK1864019T3/da active
- 2006-03-23 US US11/887,639 patent/US8220380B2/en active Active
- 2006-03-23 PL PL11173668T patent/PL2385252T3/pl unknown
- 2006-03-23 AT AT06708810T patent/ATE519034T1/de active
- 2006-03-23 EP EP06708810A patent/EP1864019B1/de active Active
- 2006-03-23 JP JP2008503486A patent/JP4608575B2/ja active Active
- 2006-03-23 ES ES11173668.2T patent/ES2440945T3/es active Active
Also Published As
Publication number | Publication date |
---|---|
DK2385252T3 (da) | 2014-01-13 |
ES2440945T3 (es) | 2014-01-31 |
US20080302097A1 (en) | 2008-12-11 |
JP2008534850A (ja) | 2008-08-28 |
PL2385252T3 (pl) | 2014-03-31 |
DK1864019T3 (da) | 2011-11-07 |
US8220380B2 (en) | 2012-07-17 |
EP2385252B1 (de) | 2013-10-16 |
ATE519034T1 (de) | 2011-08-15 |
WO2006103199A1 (de) | 2006-10-05 |
JP4608575B2 (ja) | 2011-01-12 |
PL1864019T3 (pl) | 2011-12-30 |
DE202005005165U1 (de) | 2006-08-17 |
EP2385252B2 (de) | 2017-10-11 |
EP2385252A1 (de) | 2011-11-09 |
ES2369281T3 (es) | 2011-11-29 |
EP1864019A1 (de) | 2007-12-12 |
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