DE3918119A1 - Operating arrangement for linear motor(s) esp. for dispenser - contains controller acting as pump or drive motor depending on line pressure w.r.t. working pressure - Google Patents

Operating arrangement for linear motor(s) esp. for dispenser - contains controller acting as pump or drive motor depending on line pressure w.r.t. working pressure

Info

Publication number
DE3918119A1
DE3918119A1 DE19893918119 DE3918119A DE3918119A1 DE 3918119 A1 DE3918119 A1 DE 3918119A1 DE 19893918119 DE19893918119 DE 19893918119 DE 3918119 A DE3918119 A DE 3918119A DE 3918119 A1 DE3918119 A1 DE 3918119A1
Authority
DE
Germany
Prior art keywords
pressure
machine
working
motor
linear motor
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Withdrawn
Application number
DE19893918119
Other languages
German (de)
Inventor
Alfons Ittermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mannesmann Rexroth AG
Original Assignee
Mannesmann Rexroth AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to DE19883805290 priority Critical patent/DE3805290A1/en
Application filed by Mannesmann Rexroth AG filed Critical Mannesmann Rexroth AG
Priority to DE19893918119 priority patent/DE3918119A1/en
Publication of DE3918119A1 publication Critical patent/DE3918119A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02Installations or systems with accumulators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/14Energy-recuperation means

Abstract

A linear motor is connected via a hydrostatic machine (4) to a pressure line supplied by a pressure source. A controller (5) acting as a pump feeds a working medium from a tank to the line when the line pressure exceeds the working pressuree and drives the machine when it is less. Starting from max. reservoir (3) pressure, the controller is driven by a motor (6) to load the reservoir. The machine (4) is then driven until the reservoir pressure is reduced to a lower limit. ADVANTAGE - Simplified and made more efficient.

Description

Patent application P 38 05 290 relates to an arrangement for actuating at least one linear motor, in particular for a dosing device.

Here is a hydrostatic machine, in particular a constant unit connected to the linear motor and coupled with a hydrostatic adjustment unit. Both machines are with one pressure line and one Memory connected. The memory is from a driven pump fed with pressure medium. The Operation of this arrangement according to the aforementioned Patent application is now such that the memory is on a much higher than the working pressure in the linear motor occurring pressure is charged. When pressed of the linear motor, the machine initially works as a motor and drives the adjustment unit, which as Pump working equipment in the pressure line feeds. Finally, the storage pressure drops below the working pressure of the linear motor, so it works Machine as a pump and is also used by the Ver actuator unit, which is now a motor working tools from the store takes. The performance figures of the two machines and the memory content as well as that in the memory  maximum and minimum pressure are regarding the Work equipment requirements and the working pressure on Linear cylinder tuned so that the installed Performance of the machines compared to known arrangements greatly reduced and the pressure drop of the accumulator is used in an optimal way. This is done the Zustom of the pressure medium to the linear motor throttle free, so that the efficiency is high and ins particularly disadvantageous heating in dosing systems the pressure medium is not to be feared.

There are cylinder controls on the printing network Hydro-transformers known ("oil hydraulics and Penumatik "31 (1987) No. 3, pp. 248-259), in which also a constant feeding the linear motor unit is coupled with an adjustment unit. As long as the pressure in the printing network is greater than that working pressure occurring on the linear motor the constant unit as a motor and gives about the Shaft mechanical power to the adjustment unit starting that excess power in hydraulic Power converted and fed back into the printing network. If, on the other hand, the working pressure is greater than the network pressure, so the constant unit works as a pump and will by the adjustment unit working as a motor driven so that both units the printing network performance remove. There is also a choke here free supply of working fluid to the cylinder with the corresponding Efficiency, but the known arrangement works a printing network with embossed printing, which is roughly is kept constant. The working pressure is against it variable according to the load conditions so that it is above and below the network pressure.

In contrast, there is the basis of the invention Task in it, starting from that in the patent application  P 38 05 290 arrangement disclosed a simplification and to achieve an efficiency improvement.

This object is achieved by the in the patent Claim 1 specified features solved.

Accordingly, the pump for charging the storage tank is not required. Rather, this task is performed by the adjustment unit additionally taken over. The one with the adjustment unit and the hydrostatic machine for the linear motor coupled drive motor, especially an electric motor takes over the base load and is with one corresponding rated power. The drive engine power is distributed among the adjusters unit or on the machine for the linear motor. Is the working pressure is higher than the still available storage pressure, the additional energy required for the pressure increase from the memory and the Adjustment unit works as a motor that works together with the engine for the cylinder drives. In the remaining operating hours, in particular when the linear motor is at a standstill and / or when back driving the linear motor when little power is required a corresponding share of the performance of the Drive motor available, the adjustment unit drives, so that the pressure in the memory can be increased or the memory to its maximum Pressure can be charged. Even at the beginning of the Operating game when the memory pressure is higher than that Working pressure is and the machine for the linear motor works as a motor, thus receives the adjustment unit also mechanical power, which the adjustment unit called Pump operates and thus through the fed work liquid the pressure drop in the accumulator slows down. In this way, the pressure can be exploited slopes for the store as well as for one reason power supply drive motor the installed  Performance for the machines and the storage continues reduce, and thus optimize the work cycle, whereby the efficiency is improved.

Advantageous developments of the invention are in the Subclaims marked.

The inflow of pressure medium to the linear motors leaves either by adjusting the Achieve machines that are pre-selected as adjustment units are seen. In another embodiment, you can directional proportional valves can also be provided. Also can such directional valves in connection with adj units may be provided. Are the adjustment units can be swiveled beyond the zero point also when retracting the drive cylinder under load Recover energy to recharge the storage.

The regulation of the arrangement, in particular the adjustment unit takes place in the manner described in the main application Wise. The ones disclosed and presented in the main application Funds for the scheme can also be found in use this additional application without further ado the, so that a separate representation is dispensed with. Possibly. can the present application by these means be supplemented. This also applies to those related with the dosing device in the main patent application disclosed details.

Two exemplary embodiments of the invention are explained in more detail below with reference to the drawing, in which Fig. 1 shows an arrangement without directional valves and Fig. 2 shows an arrangement with directional valves.

In Fig. 1, an adjustment unit 4 , a further adjustment unit 5 , an electric motor 6 as a drive and a further adjustment unit 40 are arranged on a common shaft. The adjustment unit 5 is connected to a memory 3 via a pressure line 2 . The machine 4 is connected via a line 8 to a cylinder 10 and the machine 40 is connected via a line 41 to a cylinder 10 '. Post-suction valves 11 as well as an unlockable check valve 12 and a shut-off valve 14 complete the arrangement. All machines 4 , 5 and 40 are hydrostatic machines that can be swiveled over the zero point.

The procedure is as follows: To fill the reservoir 3 to a maximum reservoir pressure above the working pressure of the cylinders 10 , the adjusting unit 5 is driven by the motor 6 and conveys working fluid from the tank T via the opening valve 12 into the line 2 and loads the memory 3 . If the working cycle of the cylinder 10 begins, the valve 14 is switched over and moves in the forward direction. The machine 4 removes pressure medium from the memory 3 . Since the working pressure for the cylinder 10 is lower than the storage pressure, the pressure drop across the machine 4 is converted into mechanical power and, together with the motor 6, serves to drive the adjusting unit 5 , which conveys the working fluid into the storage 3 and thus maintains the pressure seeks to maintain.

The performance of the machines 4 , 5 , 6 and the accumulator 3 are now such that the accumulator pressure drops during the actuation of the cylinder 10 . The pressure drop on the machine 4 and thus the mechanical power for the adjusting unit 5 , whose delivery volume is reduced, decreases to the same extent.

Then, during the actuation of the cylinder 10, the storage pressure drops below the working pressure, the delivery volume of the adjusting unit 5 is further reduced and the motor 6 drives the machine 4 to increase the pressure drop and achieve the working pressure for the cylinder 10 . Finally, the adjustment unit 5 is pivoted to pump operation, so that when the valve 12 is unlocked, the flow of working medium reverses and the unit 5 is driven by the pressure medium from the accumulator 3 and, working as a motor, supplies mechanical power for driving the machine 4 . The arrangement is such that the minimum pressure in the memory is reached after one or more working cycles of the cylinder 10 . When the cylinders are retracted or during downtimes, the motor 6 can recharge the accumulator 3 via the drive of the adjusting unit 5 .

When driving back, the machine 4 can also be pivoted beyond the zero point, so that the working medium displaced by the cylinder 10 drives the machine 4 as a motor and energy is recovered. The speed for the actuation of the cylinder 10 is determined by a corresponding setting of the delivery volume of the machine 4 without the need for a directional valve in the line 8 . The same applies to the machine 40 for actuating the cylinder 10 '.

In Fig. 2, the same components are provided with the same reference characters. Instead of the valve 14 , an unlockable check valve 15 is provided and in the lines 8 and 41 are 4/3-way valves 16 , 16 'installed. In this case, the machines 4 , 40 could be designed as constant units. In the embodiment, they are also adjustment units to adjust the volume flow. Possibly. can also be recovered energy when driving the cylinder under load when pushing back, so that, as shown, the unit 4 is adjustable over the zero point.

Claims (4)

1. Arrangement for actuating at least one linear motor, in particular for a metering device, wherein the linear motor is connected to a pressure line fed from a pressure medium source with memory, with a hydrostatic machine between the linear motor and the pressure medium source and with a hydrostatic adjusting unit coupled to the machine the pressure medium source and a tank, wherein the adjusting unit works as a pump, driven by the machine, and supplies working medium from the tank into the pressure line if the pressure in the pressure line is greater than the working pressure, and wherein the adjusting unit, working as a motor, drives the machine when the working pressure is greater than the pressure in the pressure line, according to P 38 05 290, characterized in that a drive motor ( 6 ) is coupled to the machine ( 4 , 40 ) and the adjusting unit ( 5 ), that the adjusting unit serves as a pressure medium source for charging of the memory ( 3 ) vo and that the accumulator pressure can be changed, the maximum and the minimum accumulator pressure being higher or lower than the working pressure, the adjustment unit ( 5 ) of the drive motor ( 6 ) and the machine ( 4 , 40 ) being based on the maximum accumulator pressure. for loading memory ( 3 ) is driven and then the adjusting unit ( 5 ) and the drive ( 6 ) drives the machine ( 4 , 40 ) until the memory pressure has dropped to a lower limit value, in which the at least one stroke work game of the linear motor ( 10 , 10 ') has ended.
2. Arrangement according to claim 1, characterized in that the provided for actuating the linear motors ( 10 , 10 ') machines are adjusting units ( 4 , 40 ) which are adjustable beyond the zero point.
3. Arrangement according to claim 2, characterized in that the adjustment units directly to the Linear motors are connected.
4. Arrangement according to claim 2, characterized in that the adjusting units via directional valves ( 16 , 16 ') are connected to the linear motors.
DE19893918119 1987-12-04 1989-06-02 Operating arrangement for linear motor(s) esp. for dispenser - contains controller acting as pump or drive motor depending on line pressure w.r.t. working pressure Withdrawn DE3918119A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19883805290 DE3805290A1 (en) 1987-12-04 1988-02-19 Arrangement for actuating at least one linear motor, in particular for a metering device
DE19893918119 DE3918119A1 (en) 1988-02-19 1989-06-02 Operating arrangement for linear motor(s) esp. for dispenser - contains controller acting as pump or drive motor depending on line pressure w.r.t. working pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19893918119 DE3918119A1 (en) 1988-02-19 1989-06-02 Operating arrangement for linear motor(s) esp. for dispenser - contains controller acting as pump or drive motor depending on line pressure w.r.t. working pressure

Publications (1)

Publication Number Publication Date
DE3918119A1 true DE3918119A1 (en) 1990-12-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19893918119 Withdrawn DE3918119A1 (en) 1987-12-04 1989-06-02 Operating arrangement for linear motor(s) esp. for dispenser - contains controller acting as pump or drive motor depending on line pressure w.r.t. working pressure

Country Status (1)

Country Link
DE (1) DE3918119A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994024438A1 (en) * 1993-04-14 1994-10-27 Tatu Miikkulainen Method and apparatus in a pressure medium system
DE4416723A1 (en) * 1994-05-11 1995-11-16 Rexroth Mannesmann Gmbh Hydraulic system with working cylinder, two hydrostatic machines and load
DE19621907A1 (en) * 1996-05-31 1997-12-04 Boy Gmbh Dr Hydraulic drive system for controlling several power units, especially of injection moulding machine
DE19709475A1 (en) * 1997-03-07 1998-09-10 Rexroth Mannesmann Gmbh Hydraulic lifting device for platform or cage, etc.
FR2825421A1 (en) * 2001-06-05 2002-12-06 Ptc Counter pressure suppressor for hydraulic motor return circuit has hydraulic assist pump with auxiliary motor driven by high pressure fluid feeding the main motor
EP1288505A1 (en) * 2000-05-19 2003-03-05 Komatsu Ltd. Hybrid machine with hydraulic drive device
JP2005249198A (en) * 2004-03-05 2005-09-15 Deere & Co Closed circuit energy recovering system for working apparatus
EP1895168A1 (en) * 2006-09-01 2008-03-05 Parker Hannifin Aktiebolag Valve arrangement
WO2011133849A1 (en) * 2010-04-23 2011-10-27 Clark Equipment Company Pump suction charging system
CN102587444A (en) * 2012-03-07 2012-07-18 浙江大学 Oil hybrid system for excavator with energy differential recovery

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3217527C2 (en) * 1982-05-10 1986-07-24 Mannesmann Rexroth Gmbh, 8770 Lohr, De
DE3805290A1 (en) * 1987-12-04 1989-06-15 Rexroth Mannesmann Gmbh Arrangement for actuating at least one linear motor, in particular for a metering device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3217527C2 (en) * 1982-05-10 1986-07-24 Mannesmann Rexroth Gmbh, 8770 Lohr, De
DE3805290A1 (en) * 1987-12-04 1989-06-15 Rexroth Mannesmann Gmbh Arrangement for actuating at least one linear motor, in particular for a metering device

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
- DE-Z: HAAS, H.-J.: Drehzahl- und Lageregelung von Verstellmotoren an einem zentralen Drucknetz. In: o+p ölhydraulik und pneumatik 30, 1986, Nr.12, S. 909-912, 914 *
DE-Z: DLUZIK, K.: Zylinderansteuerungen am Druck- netz durch Hydro-Transformatoren.In: ö+p ölhydrau-lik und pneumatik 31, 1987, Nr.3, S.248, 251-254, 259 *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994024438A1 (en) * 1993-04-14 1994-10-27 Tatu Miikkulainen Method and apparatus in a pressure medium system
DE4416723A1 (en) * 1994-05-11 1995-11-16 Rexroth Mannesmann Gmbh Hydraulic system with working cylinder, two hydrostatic machines and load
DE19621907A1 (en) * 1996-05-31 1997-12-04 Boy Gmbh Dr Hydraulic drive system for controlling several power units, especially of injection moulding machine
DE19709475A1 (en) * 1997-03-07 1998-09-10 Rexroth Mannesmann Gmbh Hydraulic lifting device for platform or cage, etc.
US6962050B2 (en) 2000-05-19 2005-11-08 Komatsu Ltd. Hybrid machine with hydraulic drive device
EP1288505A1 (en) * 2000-05-19 2003-03-05 Komatsu Ltd. Hybrid machine with hydraulic drive device
EP1288505A4 (en) * 2000-05-19 2004-12-15 Komatsu Mfg Co Ltd Hybrid machine with hydraulic drive device
FR2825421A1 (en) * 2001-06-05 2002-12-06 Ptc Counter pressure suppressor for hydraulic motor return circuit has hydraulic assist pump with auxiliary motor driven by high pressure fluid feeding the main motor
JP2005249198A (en) * 2004-03-05 2005-09-15 Deere & Co Closed circuit energy recovering system for working apparatus
EP1895168A1 (en) * 2006-09-01 2008-03-05 Parker Hannifin Aktiebolag Valve arrangement
US8833391B2 (en) 2006-09-01 2014-09-16 Parker-Hannifin Corporation Valve arrangement
WO2011133849A1 (en) * 2010-04-23 2011-10-27 Clark Equipment Company Pump suction charging system
CN102859081A (en) * 2010-04-23 2013-01-02 克拉克设备公司 Pump suction charging system
CN102587444A (en) * 2012-03-07 2012-07-18 浙江大学 Oil hybrid system for excavator with energy differential recovery
CN102587444B (en) * 2012-03-07 2014-07-30 浙江大学 Oil hybrid system for excavator with energy differential recovery

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