Abstract:
This invention relates to a hydraulic pig advance system comprising a control volume chamber (12) containing hydraulic fluid and a force transmitting member (16). The system further comprises two directional control valves (36, 40) which can be selectively repositioned to cause hydraulic fluid to cycle the force transmitting member (16) back and force such that in each cycle, a metered amount of hydraulic is transmitted into a pig housing (44) where it causes a pig (45) to move a predetermined distance.
Abstract:
[0049] A valve (10) and a hydraulic controller (45) are provider. The valve may combine a rotary-to-linear converter (24) with the hydraulic controller to provide for at least two mechanisms for actuating the valve. Additionally, the valve may include a mechanical lock mechanism (36) suitable for securing the valve at a desired flow position. The mechanical lock mechanism may also provide overload protection. That is, the mechanical lock mechanism may "slip" or disengage if torque forces reach undesired levels. The hydraulic controller may enable a "stepping" mode of control and "fast actuation" mode of control. The "stepping" mode may deliver a discrete quantity of a fluid, while the "fast actuation" mode may deliver a continuous quantity of the fluid.
Abstract:
A fluidic exoskeleton system. The system can include one or more fluidic actuator units that have: a joint; a first and second arm coupled to the joint; an inflatable bellows actuator extending between a first and second plate associated with the joint, the inflatable bellows actuator defining a bellows cavity, the inflatable bellows actuator configured to extend along a length of the bellows actuator when inflated by introducing fluid into the bellows cavity; and one or more constraint ribs extending from the joint and surrounding portions of the bellows actuator along the length of the bellows actuator.
Abstract:
A hydraulically operated fluid metering apparatus (54, 56) provides discharge of a known volume of fluid to an actuator (22) of a well tool. In one described embodiment, the fluid metering apparatus (54, 56) is connected to a hydraulic input of a well tool actuator (22). Discharge of the known volume of fluid to the actuator input causes a piston (42) of the actuator to displace a known distance, thereby producing a known increment of actuation of the well tool. The discharge of the known volume of fluid may be repeated to produce a desired total degree of actuation of the well tool.
Abstract:
Es wird ein hydraulischer Antrieb (1, 100) und ein Verfahren zum diskreten Verändern eines Positionsausgangs (3), insbesondere dessen Weg- und/oder Winkelausgangs, an einem hydraulischen Antrieb (1, 100) gezeigt, bei dem in Abhängigkeit mindestens eines Eingangssignals (4, 5) wenigstens ein Verdrängerzylinder (6, 7) sein Verdrängervolumen (8, 9) durch Verlagerung seines Kolbenelements (10, 11) von einer Ausgangslage (12, 13) in eine Endlage (14, 15) dem Antrieb (1, 100) inkrementell entweder zu- oder abführt, indem das Kolbenelement (10, 11) des Verdrängerzylinders (6, 7) mehrmals von der Ausgangs- in die Endlage (12, 14 bzw. 3, 15) und von dieser Endlage (14, 15) wieder zurück verlagert wird, um entsprechend des zu- bzw. abgeführten Verdrängervolumens (8, 9) den Positionsausgang (3) am Antrieb (1, 100) diskret zu verändern, wobei beim Verlagern des Kolbenelements (10, 11) von der Ausgangs- in die Endlage (12, 14 bzw. 13, 15) der Verdrängerzylinder (6, 7) mit einer Zu- oder Rückleitung (20, 21) einer Druckmittelquelle (22) hydraulisch verbunden wird und in einem nachfolgenden Schritt der veränderte Positionsausgang (3) am Antrieb (1, 100) wieder zurückgestellt wird. Um einen standfesten, kostengünstigen und ein im Wegausgang äußerst präzise geführten hydraulischen Antrieb (1, 100) zu schaffen, wird vorgeschlagen, dass beim Zurückverlagern des Kolbenelements (10, 11) von der End- in die Ausgangslage (14, 12 bzw. 15, 13) die Zylinderkammern des Verdrängerzylinders (6, 7) über eine von der Zu- oder Rückleitung (20, 21) der Druckmittelquelle (22) hydraulisch getrennte Kurzschlussleitung (30, 31) hydraulisch kurzgeschlossen werden.
Abstract:
Die vorliegende Erfindung betrifft eine hydraulische Schaltung (1) zur Ansteuerung einer Kupplungs-Brems-Kombination (2) über ein Pressensicherheitsventil (9), wobei eine Dosierkolbeneinheit (13) über eine bidirektional durchströmbare Leitungsverbindung mit der Kolben-Zylindereinheit (6) verbunden ist.
Abstract:
A valve installation is provided, including a valve assembly having a valve, and a fluidized valve actuator coupled with the valve assembly. The actuator includes at least two cylinders and pistons positioned to communicate fluid to apply pressure to the valve assembly. Extension of each piston communicates pressure to the valve assembly and at least partially lifts the valve into an at least partially lifted and open position. The valve installation may be used to regulate fluid flow in various systems, including cyclical swing adsorption processes.
Abstract:
The invention relates to an operating cylinder (10) for a gearbox (4), comprising a cylinder housing (14) which is provided with first and second endwalls (16, 18) to form a space (20); a piston (22) which is provided with a piston rod (24) and divides said space (20) into first and second spaces (34, 36); an aperture (28) in the first endwall (16) through which the piston rod (24) is arranged to extend; a first port (38) in communication with the first space; and a second port (40) in communication with the second space (36), through which ports (38, 40) a fluid is supplied and removed in order to move the piston (22) relative to the cylinder housing (14). The piston (22) is provided with an axial cavity (70) which is arranged to abut by means of a plain bearing (72) against a protrusion (74) situated on the second endwall (18). The invention relates also to a gearbox (4) provided with such an operating cylinder (10), and to a vehicle (1) provided with such a gearbox (4)
Abstract:
An actuator for relatively moving two parts in a damped manner. The actuator includes a damper housing for connection to a first of the parts. The damper housing includes a damper chamber. The actuator includes a drivable damper rod for connection to a second of the parts and being movable relative to the damper housing. The damper rod includes a damper unit located within the damper chamber. The damper unit is relatively movable within the damper chamber with the damper unit movement corresponding to the relative movement between the damper housing and damper rod and the relative movement between the first and second parts. The damper unit is movable in response to hydraulic pressure force upon the damper unit. The actuator includes a pneumatic pressure source for providing a pneumatic pressure force that is transferred to provide the hydraulic pressure force upon the damper unit. The actuator includes a selectively actuatable blocking device for permitting transfer of the pneumatic pressure force from the pneumatic pressure source and blocking return of force to the pneumatic pressure source until the selectively actuatable blocking device is actuated.