公开(公告)号：EP0760908B1

公开(公告)日：1999-01-20

申请号：EP95919366.5

申请日：1995-04-29

Applicant: Mannesmann Rexroth AG

Inventor： SCHMITT, Martin ,  WEICKERT, Thomas

IPC: F15B11/16 ,  F15B11/05

CPC classification number: F15B13/0417 ,  F15B11/16 ,  F15B11/165 ,  F15B2211/20553 ,  F15B2211/253 ,  F15B2211/30535 ,  F15B2211/31576 ,  F15B2211/40515 ,  F15B2211/40569 ,  F15B2211/45 ,  F15B2211/455 ,  F15B2211/50518 ,  F15B2211/6052 ,  F15B2211/6055 ,  F15B2211/6355 ,  F15B2211/7053 ,  F15B2211/71

Abstract: The invention is based on a control arrangement for at least two hydraulic consumers (15, 16) having a variable displacement pump (10), the setting of which can be altered by a load sensing regulator (41), to which the highest load pressure can be applied via a load signalling line (28), on which maximum pressure and power control are superimposed, two adjustable metering diaphragms (13, 14), a first one of which is fitted between the variable displacement pump (10) and a first hydraulic consumer (15) and the second between the variable displacement pump (10) and a second hydraulic consumer (16), and two pressure balances (19, 20), the first of which is fitted after the first metering diaphragm (13) and the second after the second diaphragm (14), to the control pistons (22) of which can be applied pressure, at the front (23) according to the metering diaphragm (13, 14) concerned, in the opening direction and pressure at the rear (26) in the load signalling line (28) in the closing direction. To prevent the pump pressure from reaching a maximum, because, with the simultaneous actuation of both hydraulic consumers (15, 16), one of them is driven against a stop or exerts a clamping effect, it is envisaged that with such joint control only of the first (15) and second (16) hydraulic consumers and from a limiting pressure lying below the maximum pressure, pressure can be applied to the load sensing regulator (41) only as a function of the load pressure of one, the first, hydraulic consumer.

公开(公告)号：EP0830221A1

公开(公告)日：1998-03-25

申请号：EP96921949.0

申请日：1996-06-07

Applicant: Mannesmann Rexroth AG

Inventor： BRECKNER, Manfred ,  KIRMAIR, Peter

IPC: F15B11 ,  B21D26 ,  F15B3

CPC classification number: F15B3/00 ,  B21D26/033 ,  B30B1/32

Abstract: A hydraulic pressure boosting unit (11) is used in particular in a press operating according to the high inner pressure extrusion process. The hydraulic pressure boosting unit has a docking cylinder (10) with a docking piston that slides in a first cylinder chamber (15) and a docking piston rod (26) secured to the docking piston projects outwards through a housing head (20). The hydraulic pressure boosting unit has a pressure booster (11) with a primary piston (40) located in a second cylinder chamber (16) coaxial to the first cylinder chamber and separated from the first cylinder chamber by a housing bottom (17) and with a secondary piston (41) that plunges into a central axial bore (28) of the docking piston and docking piston rod. In order to generate high forces with the docking cylinder, only one side of the docking piston has a piston rod, namely the docking piston rod.

公开(公告)号：EP1264109A1

公开(公告)日：2002-12-11

申请号：EP01903764.7

申请日：2001-02-14

Applicant: Mannesmann Rexroth AG

Inventor： MEISSELBACH, Alexander

IPC: F15B21/08

CPC classification number: F15B21/08 ,  F15B2013/0409

Abstract: The invention relates to a device for controlling a hydraulic actuator (13) having a valve (11) that is actuated electrically and controls the flow of the pressure means to and from the actuator. A control device (15) which is used for the position of the valve piston is integrated into the housing of the valve or is arranged on said housing in a housing of said control device (15). The aim of the invention is to additionally integrate an axis functionality into such a device. A second control device (26) that is provided for controlling the pressure or the quantity of the pressure means which is supplied to the actuator is arranged in the housing, wherein the control device (15) that is used for the position of the valve piston is arranged. Such devices are used in machine tools for instance.

公开(公告)号：EP1101039B1

公开(公告)日：2002-12-11

申请号：EP99948659.0

申请日：1999-07-20

Applicant: Mannesmann Rexroth AG

Inventor： DANTLGRABER, Jörg

IPC: F15B11/05 ,  F15B21/14

CPC classification number: F15B1/02 ,  F15B11/055 ,  F15B21/087 ,  F15B21/14 ,  F15B2211/212 ,  F15B2211/214 ,  F15B2211/30525 ,  F15B2211/3059 ,  F15B2211/3122 ,  F15B2211/6313 ,  F15B2211/632 ,  F15B2211/6336 ,  F15B2211/665 ,  F15B2211/6654 ,  F15B2211/7052 ,  F15B2211/7058

Abstract: The invention relates to a hydro-transformer which comprises a hydro-motor (4), a control valve (2), and a control device (7). A working connection (2A) of the control valve which can be optionally connected in a hydraulic manner to a pressure connection (2P) of the control valve or to a discharge connection (2T) of the control valve is connected to a first connection (4B) of the hydro-motor. The second connection (4C) of the hydro-motor is hydraulically connected to a drive element (5). The control valve (2) is controlled by the control device (7) in response to a signal which characterizes the volume flow in the hydro-motor. If the drive element is cylinder, the retraction thereof can be carried out at a constant speed and independent of load, and energy can be recovered during insertion. By providing an additional control valve (8) between the second connection of the hydro-motor and the drive element, a higher pressure can be generated on the drive element when the pressure on the pressure connection of the control valve is low.

公开(公告)号：EP1259734A1

公开(公告)日：2002-11-27

申请号：EP01902386.0

申请日：2001-02-02

Applicant: Mannesmann Rexroth AG

Inventor： HELLER, Roland

IPC: F04B17/03 ,  F04B23/02 ,  F04B53/22

CPC classification number: F04B23/021 ,  F04B17/03 ,  F04B53/22

Abstract: The invention relates to a compact electrohydraulic motor pump unit comprising a housing (10) which forms a reservoir for a pressurised fluid. Said housing contains an electromotor (11) and has a first housing sealing section (12), a second housing sealing section (13) and a tubular housing mid-section (14) positioned therebetween. A support plate (35) for a pump (40) that can be driven by the electromotor (11) using a motor shaft (23) and that can be supplied by the pressurised fluid along a pressurised flow route to a delivery valve (88), is located between the second housing sealing section (13) and the electromotor (11). In order to reduce the number of sealing points between the interior and the exterior of the housing, the invention is characterised in that the delivery valve (88) is situated on the exterior of the second housing sealing section (13), that the second housing sealing section (13) and the tubular housing mid-section (14) lie adjacent to one another at their peripheries, sealing the interior of the housing (10) towards the exterior and that the support plate (35) is completely contained within the interior of the housing (10).

公开(公告)号：EP1211059A2

公开(公告)日：2002-06-05

申请号：EP01127201.0

申请日：2001-11-16

Applicant: Mannesmann Rexroth AG

Inventor： Schmidt, Stefan

IPC: B30B15/14

CPC classification number: B30B15/142 ,  B30B15/10

Abstract: Die Erfindung betrifft eine hydraulische Steuerung für eine hydraulisch betätigbare Kupplungsbremskombination (13) insbesondere an der Exzenterwelle (12) einer mechanischen Presse mit einer eine Hydropumpe (35) und bevorzugt auch einen Hydrospeicher (36) aufweisenden Druckmittelquelle zur Versorgung eines die Kupplung und/oder die Bremse betätigenden Hydrozylinders (18) mit Druckmittel. Eine bekannte Steuerung dieser Art weist eine Sicherheitsventilanordnung (48,49), die einen Zulaufanschluß aufweist, über den ein Strömungspfad von der Druckmittelquelle zum Hydrozylinder führt, und ein proportional verstellbaren Regelventil (40,70) auf, mit dem der den Hydrozylinder (18) beaufschlagende Druck einstellbar ist.
Ziel der Erfindung ist es, die bekannte hydraulische Steuerung so weiterzuentwikkeln, daß sie eine hohe Dynamik besitzt und damit kurze Druckaufbau- und Druckabbauzeiten und eine hohe Regelgüte ermöglicht.
Dies wird dadurch erreicht daß ein elektrischer Drucksensor (60) vorhanden ist, von dem der den Hydrozylinder (18) beaufschlagende Druck erfaßbar ist, daß eine Regelelektronik (61) vorhanden ist, dem ein dem erfaßten Druck entsprechendes elektrisches Signal des Drucksensors zugeführt wird und daß das Regelventil ein elektrisch ansteuerbares Proportional-Wegeventil ist, das von der Regelelektronik entsprechend dem erfaßten Ist-Druck und dem gewünschten Soll-Druck angesteuert wird.

Abstract translation: 液压控制用于机械压力机的离合器具有电压力传感器（6），其检测压力在液压缸（61）操作。 甲调节电子电路（60）接收来自所述压力传感器的信号。 的调节阀（40）是实际的和预先设定的压力值之间的差进行操作的电控比例阀。

公开(公告)号：EP1181458A1

公开(公告)日：2002-02-27

申请号：EP00940261.1

申请日：2000-05-23

Applicant: Mannesmann Rexroth AG

Inventor： PÜSCHEL, Reiner

IPC: F15B11/16 ,  B29C45/68

CPC classification number: F15B21/14 ,  B29C45/82 ,  B29C2045/828 ,  F04B49/002 ,  F04B49/08 ,  F15B11/162 ,  F15B11/17 ,  F15B2211/20553 ,  F15B2211/3057 ,  F15B2211/3059 ,  F15B2211/3111 ,  F15B2211/327 ,  F15B2211/6309 ,  F15B2211/6654

Abstract: The invention relates to a hydraulic drive having several hydraulic consumers (10, 40, 41, 42, 43) also comprising a differential cylinder (10) and located especially in a plastic injection molding machine. A first (25) and a second (26) hydraulic machines are provided, both of which can operate as a pump and as a motor. The first of the two hydraulic machines is connected to a tank (30) by means of a second connection (29) and communicates with a pressure line (19) by means of a first connection (28). The pressure line can be connected to the working chamber (13) of the differential cylinder located on the rear side of the piston rod by means of a check valve (17). The second hydraulic machine is also connected to the pressure line by means of a first connection (32) and can be connected by means of a second connection (33) to a tank via a non-return valve (34) that opens in the direction of the second connection and to the working chamber (14) of the differential cylinder located on the rear side of the piston rod. According to the invention, both hydraulic machines (25, 26) can also be used to supply pressurized medium to at least one additional hydraulic consumer (40, 41, 42, 43). To this end, the at least one additional consumer can be connected to the pressure line by means of the distributing valve (44, 45, 46, 47).

公开(公告)号：EP0965140B1

公开(公告)日：2002-01-30

申请号：EP98913531.4

申请日：1998-02-27

Applicant: Mannesmann Rexroth AG

Inventor： KISON, Thomas ,  MEISSELBACH, Alexander

IPC: H01H47/32

CPC classification number: H02M3/158 ,  H01H47/325 ,  H02M2003/1555

Abstract: The invention concerns a current-controlled output stage for electromagnetic actuators with a current controller and a power section, said output stage controlling an electric current fed to an inductive load, for example a magnet coil, according to a predetermined desired value. The inductive load (1) is disposed between two electronic switches (2, 3) which are controlled jointly by the current controller (10) at a clocked voltage. The current controller varies the pulse duty factor of the clocked voltage such that the current (i1) flowing via the inductive load equals the predetermined desired value (Uw). Two free-wheeling diodes (5, 6) allow current to flow via the inductive load even during the extinction phase. The current flowing via the inductive load flows via a measuring shunt (4) which is connected on one side to earth. The amount of the voltage dropping at the measuring shunt is used as a controlled variable for the current flowing via the inductive load. Output stages of this type are provided for low-resistance inductive loads. In order to be able to use the same current-controlled output stage for high-resistance inductive loads too, a second measuring shunt (17) is disposed between the earth-side switch (3) and the inductive load (1). When high-resistance inductive loads are operating, the earth-side switch (3) is constantly switched in the conductive state and the voltage (U17) dropping at the second measuring shunt is fed to the actual value input of the current controller (10) as a measure of the current flowing via the inductive load (1). The current-controlled output stage is provided for electromagnetic actuators, in particular for proportional magnets used for controlling valves.

公开(公告)号：EP0935720B1

公开(公告)日：2002-01-23

申请号：EP97945767.8

申请日：1997-10-20

Applicant: Mannesmann Rexroth AG

Inventor： KNÖLL, Burkhard

IPC: F16K31/06 ,  F15B13/044

CPC classification number: F16K31/0679 ,  F15B13/0402 ,  F15B13/0418 ,  F15B13/0442

Abstract: Disclosed is an electrically operated directional valve, which can be put in a working position through two magnet units, inside which two operative linkages can be connected using either a pump or a tank. Providing a third magnet unit enables the final position of the valve gate to be set.

公开(公告)号：EP0851121B1

公开(公告)日：2001-10-31

申请号：EP97121125.5

申请日：1997-12-02

Applicant: Mannesmann Rexroth AG

Inventor： Dantlgraber, Jörg ,  Robohm, Michael

IPC: F04B1/22

CPC classification number: F01B3/0035 ,  F04B1/24