Abstract:
A radial piston engine is disclosed with cylinder/piston units which are arranged in a star shape, a housing and an output shaft. At least sections of a brake, in particular the discs thereof, are arranged between an inner axial sleeve-like collar of the housing and an outer axial sleeve-like collar of the output shaft. An output flange, for example for fastening a wheel which is driven by the engine, is fastened to the output shaft. The output flange is fastened to the axial shaft collar radially outside the latter. The output flange can have a ring of holes which is correspondingly likewise arranged on the axial shaft collar radially outside the latter.
Abstract:
The invention concerns a device comprising first and second brake means (16, 20) respectively integral with the first and second element (10, 12) in rotation about an axis of rotation (14), and a brake piston (18) capable of taking up an active braking position to prevent the relative rotation of the two elements and an inoperative position to enable said rotation. Said piston (18) is permanently urged towards its active position by return means (22) and is capable of being displaced towards an inoperative position by fluid supply into a brake release chamber (26). The first and second brake means respectively consist of a first and second series of teeth (16, 20) pertaining to a jaw clutch, the teeth of the first series (16) being integral with the piston (18). The first element (10) and the piston (18) have each a coupling profile (10B, 18B) extending over an axial coupling surface, said coupling profiles forming, viewed in cross-section transverse to the axis of rotation, undulations free from sharp edges, the undulations of the two coupling profiles being capable of fitting into each other to make the piston integral in rotation with the first element.
Abstract:
A hydraulic transmission comprising a variable displacement pump and motor, at least one of which has cylinders having valves which are controllable on each cycle of cylinder working volume to determine the net displacement of working fluid by the cylinder. The transmission has a valve control module which determines a displacement of the pump and the motor by specifying a displacement demand. The pump and/or motor valve control module determine the frequency of intensity peaks in the frequency spectrum of the pattern of cylinders carrying out active and inactive cycles of cylinder working volume using a first procedure and, if these will fall within disallowed frequency bands including the resonant frequency of components with which the transmission is in mechanical communication, the displacement demand, or another input, is periodically modified to supress generation of those frequencies. The hydraulic transmission is useful for example in a wind turbine generator, or a vehicle.
Abstract:
The invention relates to an arrangement for hydraulic eccentric adjustment to set a predefined displacement for a hydraulic motor, particularly a radial piston motor (1), comprising an adjustment device that can be loaded with a pressure medium in order to position an eccentric element (2) through a shuttle valve (5), wherein at least one actuating piston (19) of an adjustment cylinder (3) which can be loaded on both sides is provided as the adjustment device. One pressure chamber (7) of said adjustment cylinder is connected to a first supply line (9) to set a smaller displacement, and the other pressure chamber (8) of said adjustment cylinder is connected to a second supply line (10) to set a higher pressure volume, wherein the two supply lines (9, 10) are connected to each other through a connection line (11).
Abstract:
Es wird eine Anordnung zur hydraulischen Exzenterverstellung zum Einstellen eines vorbestimmten Schluckvolumens bei einem hydrostatischen Motor, insbesondere bei einem Radialkolbenmotor (1), mit einer Verstelleinrichtung vorgeschlagen, die zum Positionieren eines Exzenterelementes (2) über ein Wechselventil (5) mit Druckmittel beaufschlagbar ist, wobei als Verstelleinrichtung zumindest ein beidseitig beaufschlagbarer Stellkolben (19) eines Verstellzylinders (3) vorgesehen ist, dessen einer Druckraum (7) zum Einstellen eines kleineren Schluckvolumens mit einer ersten Versorgungsleitung (9) und dessen anderer Druckraum (8) zum Einstellen eines höheren Druckvolumens mit einer zweiten Versorgungsleitung (10) verbunden sind, und wobei die beiden Versorgungsleitungen (9, 10) über eine Verbindungsleitung (11) miteinander verbunden sind.
Abstract:
The present invention provides a method of controlling a fluid working machine (12) having a plurality of working cylinders (14) having pistons (16) therein and arranged to drive a shaft (18), in which said cylinders are supplied with pressurised working fluid via a manifold (24), the contents of which may be 5 purged by a de-pressuriser taking one of a number for forms such as to allow re- activation of said machine (10).
Abstract:
The present invention relates to an arrangement for controlling two drive units which interact with one another, one of which consists of a hydraulically driven motor (2). This forms part of a hydraulic system in which hydraulic fluid under pressure forms a main flow through a main duct (1) in which the motor is connected. The motor drives a varying load, and one or more valves (6, 7) control the hydraulic fluid flow through the motor on the one hand during operation and on the other hand for starting and stopping of the motor. One of the valves consists of a flow control valve (7) for flow control of the hydraulic fluid flow through the motor. The second drive unit (37) performs a working movement which, under the action of hydraulic flow under pressure, influences the loading of the motor. The flow of the hydraulic fluid to/from the second drive unit is controlled in a coordinated way with the control of the flow through the motor.
Abstract:
The invention concerns a hydraulic engine (1) comprising a housing (2A, 2B), a reaction member with a reaction profile (4), a engine block (6), an internal fluid distributor (16) capable of communicating the engine block (6) cylinders (12) with fluid supply and exhaust conduits, and a braking system comprising first and second brake means (42, 44), respectively integral in rotation with the reaction member (4) and the engine block (6). Said braking system comprises a brake piston (40) capable of being axially displaced to urge the brake means into braking contact or to release the brake. The brake piston is integral with the housing in rotation about the axis of rotation and has a substantially radial braking surface, a first braking member (42) pertaining to the first braking means and being integral with said active surface. The piston has an outer axial surface which co-operates with an inner axial surface, a coupling ring (48) forming part of the housing, the inner and outer surfaces having coupling profiles advantageously formed by undulations.