Abstract: A valve has a control slide (4) guided in a valve housing (6) so as to be longitudinally movable. The control slide selectively connects a plurality of fluid connection points (P, T, A, B) in the valve housing (6) to each other in a fluid-conducting manner or disconnects the fluid connection points from each other, and can be electrically controlled by a stepper motor (2). The control slide (4) can be actuated by an emergency device (34, 52) in the event of a malfunction or failure.
January 20, 2016
Date of Patent:
September 10, 2019
HYDAC SYSTEM GMBH
Sascha Alexander Biwersi, Marcus Hettiger, Christoph Stoenner
Abstract: An apparatus (10) blocks and adjusts a pressure for a hydraulically controllable actuator (12), particularly a lifting unit (16) of a machine (18). The apparatus (10) allows a working chamber (20, 22) to be selectively connected to a pressure supply unit (94) having a storage device (34) or to a discharge end (66), in particular a reservoir end, by a valve unit (38). In a controlling position of the valve unit (38), when the storage pressure in the storage device (34) is greater than the working pressure in the working chamber (20) of the actuator (12), the storage pressure is relieved in the direction of the discharge end (66) until the working pressure has been reached.
Abstract: A turbine valve actuator (100) controls a valve unit of a media-operated consumer unit, such as a steam or gas turbine, and has an actuating part drive (102) with a movable actuating part (104), a first media space (106) and a second media space (108). A pressure build up in the first media space (106) attempts to cause a movement of the actuating part (104) in a first direction (R). A pressure build-up in the second media space (108) attempts to cause a movement of the actuating part (104) in an opposing second direction (GR). The first media space (106) can be supplied with a fluid in predeterminable amounts by a supply (110). The second media space (108) is acted upon by a hydraulic accumulator (112) provided with a preload pressure and permanently connected to the second media space (108).
October 25, 2013
Date of Patent:
September 4, 2018
HYDAC SYSTEM GMBH
Kristof Schlemmer, Martin Piechnick, Wolfgang Britz
Abstract: An agricultural machine for discharging liquid includes a boom, a frame to which the boom is fixed such that the boom can be rotated about an axis of rotation pointing in the direction of travel, an actuating cylinder for rotating the boom about the axis of rotation, and a measurement and control system for the actuation of the actuating cylinder, wherein the actuating cylinder is mechanically connected to the frame on one side. The actuating cylinder is mechanically connected to the boom on the other side for the direct introduction of force. The actuating cylinder is formed as a double-acting actuating cylinder having a piston, to which pressure can be applied on both sides in order to move the boom in opposite directions of rotation.
January 25, 2016
April 26, 2018
AMAZONEN WERKE H DREYER GMBH & CO., HYDAC SYSTEM GMBH
Friedrich OBERHEIDE, Frank GROSSE PRUES, Timo KIEFER, Peter KOHL, Heinz-Peter HUTH, Georg KOMMA, Martin PIECHNICK
Abstract: A device for compensating for hydraulic effective pressures in a hydraulic accumulator (9) and a hydraulic actuator (5) of a hydraulic system (11, 13) has a valve arrangement (27) for blocking a connection between the hydraulic actuator (5) and hydraulic accumulator (9) and has a control valve device (11) performing a pressure compensation when a predetermined difference in effective pressures is exceeded.
Abstract: An energy converting device, particularly for converting mechanical energy to hydraulic energy and from it into electrical energy, uses as an energy transport medium, a control fluid guided in two different control circuits. The control circuits have an operative connection to each other by a coupling device (32). One control circuit (28) serves for feeding in energy, particularly in the form of mechanical energy. The other control circuit serves for discharging energy in the form of converted energy, particularly electrical energy.
February 5, 2009
Date of Patent:
December 24, 2013
Hydac System GmbH
Wolfgang Hahmann, Norbert Böhmer, Daniel Thull, Frank Herold
Abstract: A damping system, in particular in the form of a hydraulic cabin spring system, has at least one hydraulically triggerable actuating part (20) and has at least one hydraulic accumulator (26) connected to the actuating part (20). By a proportional throttle valve (10), proportional damping for the actuating part (20) is achieved. Variable proportional damping which can react to events in a manner specific to the user can be implemented.
Abstract: The invention relates to a lashing platform for inserting and removing retaining hardware for twist-lock containers, having a dead plate for a container, the dead plate being supported on a rigid base by hydraulic displacers, and having a pressure medium store fluidically connected to the hydraulic displacers, wherein the hydraulic displacers under synchronized asymmetrical loading of the dead plate.
Abstract: The hydropneumatic axle suspension for vehicles, especially the front axle thereof, cooperates with at least one suspension cylinder (10) connected to a hydraulic accumulator (26; 24) on both its ring side (14) and the piston side (12). The hydraulic accumulator (26; 24) is triggerable by control electronics (18) with the aid of a valve unit (30; 28) that can be allocated to the hydraulic accumulator (26; 24). The ring side (14) of the suspension cylinder (10) is connected to a pressure value sensor (DA-R) which transmits its measured pressure values to the control electronics (18). The pressure value sensor (DA-R) located on the ring side is connected to the discharge end (38) of the valve unit (30), which can be associated with the ring side (14) of the suspension cylinder (10).
Abstract: A fluid cooling device embodied as a modular unit includes a drive motor (10) driving a ventilation wheel (12) and a fluid pump (14) that supplies a first type of fluid into a fluid system, and leads to a heat exchanger (22) from which the fluid is redirected into the fluid system in a tempered manner. A second fluid pump (32) is used to extract a second type of fluid from the reservoir (30) and to supply the second type of fluid to a second fluid system, from which the second type of liquid is redirected towards the reservoir (30) in a guiding manner via the first heat exchanger (22) and the second heat exchanger (24). The second fluid pump enables different tempering operations to be carried out for separate fluid systems, using only one fluid cooling device.
Abstract: A device for delivery of flowable media, especially of lubricants, includes a pump (1) driven by a motor and forming a component of a line system. At least one heating element (21) activated by energy supply is located outside of the housing (3) of the pump (1) in a position enabling heat transfer to the housing (3).
Abstract: The invention relates to a cooling device for a machine tool (10) for cooling a heated fluid, for example a cooling lubricants, comprising at least one refrigerating unit (48) for a fluid which is filtered by a filtering unit (40) and is received form at least one storage tank (38) by means of a pumping unit provided with at least one hydraulic pump (P2), separated clean (22) and waste (36) tanks, wherein the refrigerating unit (48) returns the circulating cooled fluid to the clean tank (22).
Abstract: An arrangement for influencing the temperature of flowable media, especially of lubricants found in a lubricant system, has a line through which the medium flow. At least one element (11) is assigned to the line section (1, 5) for influencing the temperature, and can be activated by supplying energy. At least one element (11) is located within the line section (1, 5) in the flow path of the medium. The wall in the line section (1,5) has a connection means (9) for supplying energy to the element (11) located in the line section (1, 5).
Abstract: A hydropneumatic suspension having at least one suspension cylinder (10) and at least one hydraulic accumulator configured as a suspension accumulator (18) has a pilot-actuated valve (20) for opening or blocking a fluid-carrying connection between the suspension cylinder (10) and the suspension accumulator (18). The pilot-actuated valve (20) can be moved into the blocked position by a hydraulic actuating assembly (22). The hydraulic actuating assembly (22) taps the fluid pressure between suspension accumulator (18) and the suspension cylinder (10), and forwards it by a switching valve (24) to an operating side (26) of the pilot-actuated valve (20) through a pilot-actuated line (38). Another proportional valve (50), or such valve connected to the respective associated pilot-actuated line (38), can be between one switching valve (24) and the pilot-actuated valve (20).
Abstract: The device for controlling and actuating a vibrating mechanism, particularly in tampers, comprises a hydraulic pump (12) that drives a hydraulic motor (18), which interacts with the vibrating mechanism (10) while being a part of a hydraulic circuit (16) to which a pressure regulator (22) is connected in the secondary branch (20) and can be controlled by a hydraulic switching device (24). This configuration provides a purely hydraulic solution that does not require electrical current for controlling and switching off the vibrating mechanism.
Abstract: A safety circuit for media-operated consumers, such as steam turbines or gas turbines, includes at least one first solenoid valve (1.1) which acts on a fluid circuit. An actuating device (9) can be connected to the fluid circuit, and acts at the same time on the operating behavior of the consumer. At least one other solenoid valve (1.2, 1.3) is connected at least to one of the other solenoid valves (1.1) such that only with simultaneous triggering of at least two solenoid valves (1.1, 1.2, 1.3) does at least one control valve (2.1), connected to the fluid circuit (10) act on the actuating device (9). Permanent verifiability can occur with simultaneous implementation of the safety function. A process for operating the safety circuit is also involved.
Abstract: A suspension device is for at least one drive part (10) that is to be cushioned. The drive part can be connected to an accumulator device (12) by a first valve unit (28) and to a tank connection (46) by a second valve unit (34) to transport fluid. The device is provided with a pressure compensation device (50), which when actuated compares the respective prevailing pressures in the drive part (10) and the accumulator device (12) to generate a common pressure level. This comparison permits the pressure level to be rapidly compensated in advance when the actual suspension is enabled in the form of the accumulator device, in such a way that the suspension pressure employed exactly matches the pressure of the respective drive part in the form of a hydraulic or working cylinder that prevails in the later as a result of the preceding load actuation operations.