Abstract:
A modular compressed air energy storage system includes modular low pressure and high pressure subsystems coupled together with interstage pipes. Each of the subsystems includes a hydraulic vessel (214a, 224b) adapted to contain a heat transfer liquid and having a piston (210a, 220b) disposed therein for horizontal reciprocating movement. First and second pressure vessels (240a, 240b, 250c, 250d) are coupled to the hydraulic vessel (214a, 224b) on opposite sides of the piston (210a, 220b), each adapted to contain the heat transfer liquid and/or a gas. First and second heat transfer devices (260a, 260b, 264c, 264d) are respectively disposed within upper regions of the pressure vessels (240a, 240b, 250c, 250d). The piston (210a, 220b) is moveable in a first direction to displace at least some of the heat transfer liquid from the hydraulic vessel (214a, 224b) to the first pressure vessel (240a, 250c) and is moveable in a second direction to displace at least some of the heat transfer liquid from the hydraulic vessel (214a, 224b) to the second pressure vessel (240b,250d).
Abstract:
A hydraulic actuator (200) adapted to be coupled to one or more pistons of a compressed air energy storage (CAES) system includes a housing (205) forming a plurality of aligned bores (220a-220c), with a shaft (250) disposed therein for reciprocating movement. For a three bore configuration, the shaft has three pistons (250 230a-230c) subdividing the three bores into six pressure chambers (260a-260f). Four valves (270a-270d) fluidically connected to the six chambers selectively provide pressurized hydraulic fluid, permitting three levels of hydraulic shaft force for each direction of shaft motion.
Abstract:
Die Erfindung betrifft eine Drehvorrichtung zur Drehpositionierung einer Arbeitseinheit an einer Maschine oder Anlage mit einem eine schraubenförmige Schnecke (24) und ein damit kämmendes Schneckenrad (26) umfassenden Schneckengetriebe (12) und einem einen an der Schnecke (24) angreifenden, eine Steuerschaltung (16) umfassenden hydraulischen Drehantrieb (14). Zur Drehzahl-und Drehmomentanpassung wird vorgeschlagen, dass der Drehantrieb (14) zwei jeweils an einem Wellenende (34) der Schnecke (24) angebrachte Hydromotore (30,32) aufweist, wobei der zweite Hydromotor (32) mittels der Steuerschaltung (16) für einen gemeinsamen Arbeitsbetrieb zu dem ersten Hydromotor (30) zuschaltbar ist.
Abstract:
A hydraulic actuator adapted to be coupled to one or more pistons of a compressed air energy storage (CAES) system includes a housing forming a plurality of aligned bores, with a shaft disposed therein for reciprocating movement. For a three bore configuration, the shaft has three pistons subdividing the three bores into six pressure chambers. Four valves fluidically connected to the six chambers selectively provide pressurized hydraulic fluid, permitting three levels of hydraulic shaft force for each direction of shaft motion.
Abstract:
Die Erfindung betrifft einen Turnantrieb für eine Windenergieanlage. Der Turnantrieb umfasst eine Welle (52), einen Hydromotor (27) zum Antreiben der Welle (52) und eine Antriebsleitung (39), um dem Hydromotor (27) eine unter Druck stehende Hydraulikflüssigkeit zuzuführen. Erfindungsgemäß ist die Antriebsleitung (39) mit einem einstellbaren Druckbegrenzungsventil (30) versehen. Die Erfindung betrifft außerdem ein zugehöriges Verfahren zum Drehen der Rotorwelle (17) der Windenergieanlage. Mit dem erfindungsgemäßen Verfahren und dem Turnantrieb können die Rotorblätter (14) einzeln an der Nabe (15) des Rotors montiert werden, ohne dass das Getriebe der Windenergieanlage überlastet wird.
Abstract:
An economizer device associable with a linear pneumatic actuator (20; 220) having a casing (21) and a piston (22) slidable inside the casing (21) and defining two chambers (23, 24) in the latter, comprises a body (102; 202) provided with a first opening (103; 203) selectively connectable to a source of pressurized air or to an environment at atmospheric pressure, a second opening (104; 204) connectable to a chamber of the linear pneumatic actuator (20; 220) and a third opening (105; 205) selectively connectable to a source of pressurized air; the openings (103, 104, 105) are connected together by a first conduit (106), the device (100; 200) comprises a Venturi vacuum generator (111) slidably housed and movable in the first conduit (106) and is arranged for operating between a first operating configuration (A), in which the first opening (103; 203) is supplied with air at an operating pressure (p) and the Venturi vacuum generator (111) is movable in the first conduit (106) to permit a primary flow (Fl) of air and to reduce an outlet pressure thereof from the second opening (104; 204) so as to supply the chamber with air at a reduced pressure (pr) lower than said operating pressure (p), and a second operating configuration (B), in which the first opening (103; 203) is connected to the environment at atmospheric pressure, the third opening (105; 205) is supplied with pressurized air with which it supplies said Venturi vacuum generator (111) which creates a vacuum in the second opening (104; 204) in such a manner as to suck air from and create a vacuum in the chamber of the linear pneumatic actuator (20).
Abstract:
Joint d'étanchéité de maître-cylindre logé dans une gorge autour du piston et comportant une âme reliée à trois lèvres sensiblement annulaires et concentriques, l'âme venant en appui contre un côté de la gorge ayant une surface (100) munie d'un bord intérieur (101) suivi d'un plateau périphérique (102) coupé par au moins un canal (103) et portant une couronne extérieure (104) munie d'une zone de liaison (105) réalisée par une interruption de la couronne (104) et déformable par la pression à l'intérieur du joint pour reformer la continuité de la couronne et de l'étanchéité globalement suivant une ligne (L) tout en facilitant la purge du système de frein en l'absence de pression à travers le canal (103) et la zone de liaison (105).