EP2593679A2 - Hydroaggregat - Google Patents
HydroaggregatInfo
- Publication number
- EP2593679A2 EP2593679A2 EP11730221.6A EP11730221A EP2593679A2 EP 2593679 A2 EP2593679 A2 EP 2593679A2 EP 11730221 A EP11730221 A EP 11730221A EP 2593679 A2 EP2593679 A2 EP 2593679A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- hydraulic unit
- electric motor
- unit according
- sensor
- 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
- 238000006073 displacement reaction Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims description 9
- 230000002706 hydrostatic effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/002—Hydraulic systems to change the pump delivery
-
- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
-
- 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
- F04B2201/00—Pump parameters
- F04B2201/12—Parameters of driving or driven means
- F04B2201/1201—Rotational speed of the axis
-
- 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
- F04B2201/00—Pump parameters
- F04B2201/12—Parameters of driving or driven means
- F04B2201/1204—Position of a rotating inclined plate
-
- 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
- F04B2201/00—Pump parameters
- F04B2201/12—Parameters of driving or driven means
- F04B2201/1204—Position of a rotating inclined plate
- F04B2201/12041—Angular position
-
- 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
- F04B2201/00—Pump parameters
- F04B2201/12—Parameters of driving or driven means
- F04B2201/1205—Position of a non-rotating inclined plate
-
- 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
- F04B2201/00—Pump parameters
- F04B2201/12—Parameters of driving or driven means
- F04B2201/1205—Position of a non-rotating inclined plate
- F04B2201/12051—Angular position
-
- 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
- F04B2203/00—Motor parameters
- F04B2203/02—Motor parameters of rotating electric motors
- F04B2203/0209—Rotational speed
-
- 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
- F04B2205/00—Fluid parameters
- F04B2205/03—Pressure in the compression chamber
-
- 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
- F04B2205/00—Fluid parameters
- F04B2205/04—Pressure in the outlet chamber
-
- 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
- F04B2205/00—Fluid parameters
- F04B2205/05—Pressure after the pump outlet
Definitions
- the invention relates to a hydraulic unit according to the preamble of patent claim 1 and a method for operating a hydraulic unit.
- the document DE 10 2007 007 005 A1 shows in FIG. 3 a hydraulic unit for supplying a consumer, in which a pump is driven by an adjustable electric motor.
- the pump is a variable displacement pump.
- a hydromechanical controller for a swivel angle of the variable displacement pump and a controller for the engine speed are provided.
- variable-displacement pump pivots back. In this case, the torque of the hydraulic unit or the electric motor is lowered, resulting in energy savings.
- the invention is based on the object to provide a hydraulic unit whose efficiency is further improved during partial load operation.
- the hydraulic unit according to the invention has a controllable electric motor and a hydrostatic variable displacement pump which can be coupled thereto, the pivoting angle of which via a
- hydromechanical adjusting device is adjustable.
- the swivel angle via a swivel angle sensor and a working pressure of the variable displacement pump via a
- Pressure sensor detectable. A speed of the electric motor is dependent on the
- the rotational speed of the electric motor is controllable via a frequency converter.
- the pump can be easily switched off in the event of routine interruptions (repair, tool change, break), which leads to further energy savings.
- a frequency-controlled superordinate programmable logic controller is provided which is connected to the swivel angle sensor and to the pressure sensor. This can control the frequency converter.
- the hydromechanical adjusting device is a pressure regulator or a combined pressure-flow regulator.
- the electric motor is an asynchronous motor, in particular a cost-effective standard asynchronous motor.
- the hydraulic unit according to the invention is arranged in a machine tool - in particular in its tensioning device - or in a press or in a plastic machine - in particular plastic injection molding machine - or in a loading device for a hydraulic accumulator.
- a crawl or even a standstill with maintained working pressure is often necessary, so that the energy saving potentials according to the invention are used frequently.
- Detecting the pressure holding operation via the pressure sensor and the swivel angle sensor is simple in terms of apparatus technology.
- the pivoting angle is set to approximately zero. In zero-stroke operation, a qualitative and quantitative statement about wear and leakage in the hydraulic unit is possible.
- Figure 1 is a hydraulic circuit diagram of a first embodiment of a hydraulic unit according to the invention.
- FIG. 2 shows a hydraulic circuit diagram of a second embodiment of a hydraulic unit according to the invention.
- Figure 1 shows a hydraulic circuit diagram of a first embodiment of a hydraulic unit according to the invention. It has a variable displacement pump 1, which has a
- Working line 7 a (not shown) supplied to consumers.
- an adjustable metering orifice 8 is arranged to control the consumer.
- Hydraulic unit according to the invention is operated in an open hydraulic circuit, wherein the variable displacement pump 1 via a tank line 22 sucks pressure medium from a tank T.
- a swivel angle of the variable displacement pump 1 is adjusted via a pressure regulator 2. This is connected via a control line 10 with the working line 7 upstream of the metering orifice 8. Also upstream of the metering orifice 8, a pressure sensor 5 is arranged, which is connected via a signal line 12 to a frequency converter 6.
- the frequency converter 6 is connected via electrical lines 14 with a variable asynchronous motor 3.
- the asynchronous motor 3 is connected to the variable displacement pump 1 via a shaft 16, in which a clutch 18 is arranged.
- a swivel angle sensor 4 is arranged, whose output signal is transmitted via a signal line 20 to the frequency converter 6.
- a pressure limiting valve 24 is arranged, in which an effective in the closing direction
- the function of the first exemplary embodiment of the hydraulic unit according to the invention according to FIG. 1 will be explained below.
- a working pressure is established in the working line 7, which is reported via the control line 10 to the pressure regulator 2.
- This increases the swivel angle as the working pressure decreases while decreasing it as the working pressure increases.
- the swivel angle is reported by the swivel angle sensor 4 via the signal line 20 to the frequency converter 6, while the working pressure is reported by the pressure sensor 5 via the signal line 12 to the frequency converter 6.
- Figure 2 shows a hydraulic circuit diagram of a second embodiment of a hydraulic unit according to the invention. In the following, only the differences from the first exemplary embodiment according to FIG. 1 will be explained.
- simplified frequency converter 106 is connected via a signal line 126, a programmable logic controller.
- This controller 128 is superordinate to the frequency converter 106 and controls it.
- the signal line 12 connected to the pressure sensor 5 and the signal line 20 connected to the swivel angle sensor 4 are connected to the controller 128.
- Asynchronous motor 3 is transmitted from the controller 128 via the signal line 126 to the frequency converter 106.
- variable displacement pump 1 is swung back via the pressure regulator 2. If, in this case, the swivel angle determined by the swivel angle sensor 4 drops below a threshold value, while at the same time the working pressure determined by the pressure sensor 5 in the
- Working line 7 remains above a predetermined threshold, detects the frequency converter 6 associated electronic circuit, the pressure holding operation. In a theoretical limiting case, this can also be a zero-stroke operation in which the
- Variable displacement pump 1 is pivoted back to zero and no further pressure medium in the Working line 7 promotes. In this case, the previously generated working pressure is maintained in the working line 7 and leaves the consumer against his load force.
- Asynchronous motor 3 is reduced.
- the hydraulic unit according to the invention saves energy.
- variable displacement pump may be an axial piston pump or a radial piston pump.
- a hydraulic unit with a controllable electric motor and with a hydrostatic variable displacement pump coupled thereto, whose pivoting angle over a
- hydromechanical adjusting device is adjustable.
- the swivel angle via a swivel angle sensor and a working pressure of the variable displacement pump via a
- Pressure sensor detectable. A speed of the electric motor is dependent on the
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010027183 DE102010027183A1 (de) | 2010-07-14 | 2010-07-14 | Hydroaggregat |
PCT/EP2011/003295 WO2012007114A2 (de) | 2010-07-14 | 2011-07-02 | Hydroaggregat |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2593679A2 true EP2593679A2 (de) | 2013-05-22 |
EP2593679B1 EP2593679B1 (de) | 2016-04-27 |
Family
ID=44628126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11730221.6A Active EP2593679B1 (de) | 2010-07-14 | 2011-07-02 | Hydroaggregat |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2593679B1 (de) |
CN (1) | CN102971532A (de) |
DE (1) | DE102010027183A1 (de) |
ES (1) | ES2573510T3 (de) |
WO (1) | WO2012007114A2 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012016780B4 (de) * | 2012-06-01 | 2021-07-22 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Fluidpumpe |
DE102016011778A1 (de) * | 2016-08-11 | 2018-02-15 | M A E Maschinen- Und Apparatebau Götzen Gmbh | Hydraulische, insbesondere druckspeicherlose, Antriebsanordnung für und mit einem Verbraucher, insbesondere für Pressen, sowie Verfahren zum Betreiben einer solchen hydraulischen Antriebsanordnung |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4823552A (en) * | 1987-04-29 | 1989-04-25 | Vickers, Incorporated | Failsafe electrohydraulic control system for variable displacement pump |
DE4335403C1 (de) * | 1993-10-18 | 1994-12-15 | Karl Hehl | Hydraulikeinrichtung |
US5951258A (en) * | 1997-07-09 | 1999-09-14 | Caterpillar Inc. | Torque limiting control system for a hydraulic work machine |
DE10110398A1 (de) * | 2001-03-03 | 2002-09-26 | Mannesmann Rexroth Ag | Verfahren zur Regelung der Druckmittelzufuhr zu einem hydraulisch betätigten Aktor |
DE102005025590A1 (de) * | 2005-06-03 | 2006-12-07 | Hydac Electronic Gmbh | Regelvorrichtung sowie Verfahren zum Betrieb einer Regelvorrichtung |
DE102007007005B4 (de) | 2007-02-08 | 2021-12-02 | Robert Bosch Gmbh | Elektrohydraulische Steueranordnung |
DE102008019501B4 (de) * | 2008-04-17 | 2019-03-21 | Robert Bosch Gmbh | Elektrohydraulische Steueranordnung |
-
2010
- 2010-07-14 DE DE201010027183 patent/DE102010027183A1/de not_active Withdrawn
-
2011
- 2011-07-02 ES ES11730221.6T patent/ES2573510T3/es active Active
- 2011-07-02 EP EP11730221.6A patent/EP2593679B1/de active Active
- 2011-07-02 CN CN2011800343862A patent/CN102971532A/zh active Pending
- 2011-07-02 WO PCT/EP2011/003295 patent/WO2012007114A2/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2012007114A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2012007114A2 (de) | 2012-01-19 |
WO2012007114A3 (de) | 2012-03-22 |
DE102010027183A1 (de) | 2012-01-19 |
CN102971532A (zh) | 2013-03-13 |
ES2573510T3 (es) | 2016-06-08 |
EP2593679B1 (de) | 2016-04-27 |
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