Abstract:
The present invention relates to an intensifier for discharging a constant flow. The intensifier of the present invention comprises a hydraulic pump, a hydraulic motor, a supply passage, first control means, and second control means. The hydraulic pump pumps an inflowing hydraulic fluid and discharges the hydraulic fluid through a discharge passage. The hydraulic motor drives the hydraulic pump to intensify the hydraulic fluid driven by inflowing hydraulic fluid and discharged by the hydraulic pump. The supply passage supplies hydraulic fluid to the hydraulic pump and to the hydraulic motor. The first control means opens and closes the supply passage, and the second control means actuates the first control means, such that when hydraulic fluid discharged from the discharge passage is greater than a set hydraulic pressure, the first control means closes the supply passage. According to the present invention, when the pressure at the discharge passage is greater than a set pressure, the supply passage is closed by the first control means and second control means, in order to prevent a rise in pressure beyond a set pressure. Thus, the intensifier of the present invention can prevent an apparatus connected to the intensifier from breaking down or being damaged. Also, since the intensifier of the present invention is able to, in addition to resolving pressure increases, continuously and uniformly discharge hydraulic fluid, it can be applied to existing equipment which continuously operates a hydraulic motor or hydraulic cylinder.
Abstract:
This Mechanism introduces a new concept for rotary valves used in fluid power transmission and control. It transforms the rotary motion precisely to axial straight motion. It can also be used as an actuator. There are two sensitive chambers at the ends of the spool. Four helical grooves operate in axial symmetry. The rotary motion of the helical groove chages the connections/distribution between ports and chambers, thus forces the spool to slide to a balanced position.
Abstract:
L' invention concerne un actionneur électrohydraulique comportant un corps (1) qui définit une cavité cylindrique (2) dans laquelle un piston (3) coulisse à étanchéité et divise un volume interne de la cavité en deux chambres (A, B) à volume variable, le piston étant associé à au moins une tige (4) qui traverse à étanchéité un fond de la cavité, l' actionneur comportant une pompe bi-directionnelle (5) ayant deux ports (Pl, P2 ) connectés chacun à l'une des chambres, un moteur électrique (8) pour entraîner sélectivement la pompe dans un sens ou dans l'autre, la pompe étant placée dans le piston de l' actionneur pour être mobile avec celui-ci. Selon l'invention, le moteur est placé en extrémité d' actionneur et entraîne un arbre de section non circulaire (6) s' étendant dans la cavité parallèlement à une direction de coulissement du piston (3) et de la tige (4), l'arbre traversant le piston (3) pour coopérer avec un organe d'entraînement (11; 21) homologue de la pompe glissant librement le long de l'arbre lors des déplacements de la tige mais entraîné en rotation lorsque l'arbre tourne sous l'action du moteur électrique.
Abstract:
A seal valve arrangement is provided for a hydraulic device (10). The hydraulic device has an inner bore (14). The seal valve arrangement includes an element (45) disposed in the bore. The element is constructed and arranged to define a fluid passage (47) so fluid can move from one side thereof to a side opposite the one side. An elastomer seal member (39) is adjacent to the fluid passage and to a seal portion (r) of the element. A spring member (41 ) biases the seal member to engage the portion (r) to maintain sealing of the fluid passage under certain fluid pressure conditions, and under different fluid pressure conditions, permits the seal member disengage from the portion of the element to open the fluid passage.
Abstract:
A pump comprises a diaphragm assembly which includes a first diaphragm (22) having a first diaphragm edge (28) and a second diaphragm (24) having a second diaphragm edge (30). The first diaphragm edge (28) and the second diaphragm edge (30) are bonded together so that a bellows chamber (26) is formed between the first diaphragm (22) and the second diaphragm (24). At least one and possibly both of the first diaphragm (22) and the second diaphragm (24) is a piezoelectric diaphragm which displaces in accordance with application of an electrical signal. A driver applies the electrical signal to whichever of the first diaphragm (22) and the second diaphragm (24) is the piezoelectric diaphragm. The first diaphragm and the second diaphragm bow outwardly together and shrink in diameter during a suction stroke but flatten out and increase in diameter during a pump stroke.
Abstract:
Die Erfindung betrifft eine Vorrichtung zum Wandeln eines Drucks in eine Drehbewegung, bzw. Drehmoment, und umgekehrt zum Wandeln eines Drehmoments in einen Druck. Dabei setzt sie sich aus einem Stator 1 und einem Rotor 2, welcher Stator 1 einen umlaufenden Kanal 4 auf seiner zum Rotor 3 gewandten zylindrischen Oberfläche 2 aufweist, wobei der Kanal 4 mit einem Druckmedium 7 ausgefüllt ist und über Durchlässe 6 für die Zu- und Abfuhr des Druckmediums 7 nach aussen verfügt, wobei sich zusätzlich ein Umlaufkolben 8 innerhalb des Kanals 4 befindet und beide getrennte Volumina voneinander abdichtet und über eine Verbindung mit dem Rotor 3 verfügt, welche Verbindung eine Kraft in tangentialer Richtung überträgt. Die Vorrichtung kann als einen hydraulischen Stellantrieb, beispielsweise auf dem Gebiet der hydraulischen Servolenkungen oder Werkzeugmaschinen, oder als hydropneumatische Drehfeder eingesetzt werden.
Abstract:
The invention regards a hydraulic cylinder (1) or a plug comprising a hydraulic cylinder for operation of anchoring and or sealing devises, where the hydraulic cylinder comprising a cylinder chamber (6), a piston head (4) within said cylinder chamber (6) forming two sub chambers (7, 7') of said cylinder chamber (6) one on each side of the piston head (4) , and a piston rod (5) which runs through the piston head (4) and said two sub chambers (7, 7') or only one of said cub chambers. The hydraulic power unit (8) for operation of the hydraulic cylinder (1) is situated at least partly within the parts forming the hydraulic cylinder (1) itself, preferably the piston head (4) and or the piston rod (5).
Abstract:
Electrohydraulic actuators and associated methods are utilized to control the operation of downhole well tool assemblies, representatively flow control devices. In the described embodiment thereof, each actuator (36) is positioned downhole and comprises a self-contained, closed circuit hydraulic system including an electrically operable double action primary pump (58) drivingly coupled to an associated well tool assembly (36) via a first hydraulic circuit, and an electrically operable switching pump (60) coupled to the first hydraulic circuit via a second hydraulic circuit interposed therein and operative to selectively alter the control flow of hydraulic fluid to the well tool assembly in a manner reversing its operation. To provide for selective, more rapid control of the well tool assembly, a chargeable accumulator (108) is connected to the hydraulic circuitry and is selectively and drivably communicatable with the well tool assembly.
Abstract:
System (1) for supplying hydraulic pressure to a bolt elongation tool (2, 41), comprising the bolt elongation tool (2, 41) with at least one pressure chamber (3) and a tool piston (12), a hydraulic medium supply system (7) and a hydraulic actuator with an actuator cylinder (5) housing an actuator piston (6). The actuator cylinder (5) is attached to the at least one pressure chamber (3), wherein the hydraulic actuator is an electro-hydraulic actuator (4) comprising an electric motor (13) built to generate the power of the electro-hydraulic actuator (4), and wherein the actuator piston (6) is built to supply, with one stroke of an actuator stroke height (39) of the actuator piston (6), at least the amount of hydraulic pressure that is needed to move the tool piston (12) for the amount of one tool stroke height (38) of the tool piston (12).