The present invention relates to a hydraulic device (10) with radial pistons, comprising: a shaft (12) arranged along an axis (1); a cover (13) forming a casing element, the cover and the shaft being free to rotate with respect to one another; a distribution assembly comprising: a multi-lobe cam (14); a cylinder block (15); a distributor (16) configured to exert a thrust force (P) against the cylinder block (15) along the axis (11) of the shaft; an assembly (22) of mechanical bearings comprising at least one mechanical bearing (22a) mounted in radial contact between the cover (13) and shaft (12), said assembly being configured to take up the thrust force (P) exerted by the distributor (16); and a radial contact ball bearing mounted in radial contact between the cover (13) and the shaft (12).

An injector generator for use in geomechanical pumped storage systems includes a power end and a fluid end. The fluid end has one or more fluid chambers each having a fluid inlet and outlet that are controlled by rotary valves. The fluid end can function as a pump or as a motor driven by fluid pressure from the geomechanical storage formation.

An injector generator for use in geomechanical pumped storage systems includes a power end and a fluid end. The fluid end has one or more fluid chambers each having a fluid inlet and outlet that are controlled by rotary valves. The fluid end can function as a pump or as a motor driven by fluid pressure from the geomechanical storage formation.

A housing for a motor or compressor has an elongate crankcase with two end surfaces. At least one cylinder chamber is provided in which a piston is caused to perform a movement by rotation of the crankshaft. The internal diameter of the crankcase narrows monotonously from the first end surface to the second end surface. A crankcase shaped in this way can be manufactured particularly easily by virtue of the casting being performed around a shaping mandrel. A shaping mandrel of this type must likewise narrow monotonously in order that, after the casting has been performed around it, the shaping mandrel can be pulled out of the housing at a first end. By way of the shaping of the crankcase, it is possible for the housing to be of unipartite and at the same time very compact construction.

A method and apparatus for gas compression and expansion that simultaneously serves as storage tank for the compressed gas, and heat exchanger for heat transfer to the environment to maintain near-isothermal conditions.

A generator is described comprising in particular a vertical supply column that can be filled with a certain quantity of liquid, an intake valve disposed at a base of the vertical supply column, and a leaktight tank communicating with the vertical supply column via the intake valve, which leaktight tank can be filled with liquid. The generator also comprises an exhaust valve disposed on the leaktight tank and capable of releasing pressure generated in the leaktight tank, and a piston-forming device disposed inside the leaktight tank so as to be immersed in the liquid contained in the leaktight tank. This piston-forming device is capable of being set in reciprocating movement between an upper position and a lower position, the piston-forming device comprising a first, float-forming portion capable of bringing the piston-forming device into the upper position and a second portion forming an output shaft. The generator further comprises a converter device coupled to the output shaft, which converter device is capable of converting the reciprocating movement of the piston-forming device into mechanical or electrical energy. The generator is configured in such a way that, in operation, the leaktight tank is filled with liquid, and in such a way as to repeat a sequence of operating phases in order to induce the reciprocating movement of the piston-forming device.

An injector generator for use in geomechanical pumped storage systems includes a power end and a fluid end. The fluid end has one or more fluid chambers each having a fluid inlet and outlet that are controlled by rotary valves. The fluid end can function as a pump or as a motor driven by fluid pressure from the geomechanical storage formation.

A motor for driving a liquid end of a pump system. The motor having an inner housing having an outer surface, a mechanical actuator disposed in the inner housing, and a water jacket surrounding at least a portion of the outer surface of the inner housing to define a volume between the inner housing and the water jacket. The volume being sized to circulate water within the water jacket so as to transfer heat from the inner housing to the water.

The present invention relates to a power generating unit (100, 200, 400) comprising a hydraulic unit (102, 202, 402); an interface unit (104, 204, 404) connected to the hydraulic unit (102, 202, 402), said interface unit (104, 204, 404) being connectable to a stationary unit; a power flow shaft (302) connected between the hydraulic unit (102, 202, 402) and the interface unit (104, 204, 404) for supply of a torque load there between; and at least one connecting element (110, 210, 410) arranged between the hydraulic unit (102, 202, 402) and the interface unit (104, 204, 404), said at least one connecting element (110, 210, 410) being controllable between a first state in which a relative rotation between the hydraulic unit (102, 202, 402) and the interface unit (104, 204, 404) is allowed, and a second state in which a relative rotation between the hydraulic unit (102, 202, 402) and the interface unit (104, 204, 404) is prevented.

A hydraulic apparatus comprising a casing (1) having arranged therein a hydraulic machine (2), a shaft (4) mounted to rotate relative to the casing (1) by means of a bearing (5), a braking system (3) having a plurality of brake disks (31, 34) configured to prevent the shaft (4) rotating relative to the casing (1) in selective manner, and a control system (6, 7) for controlling said braking disks (31, 34), the hydraulic system including an irrigation system adapted to cool said brake disks (31, 34) by means of a fluid, the irrigation system including a fluid inlet (81) and a fluid outlet (82), the hydraulic system being characterized in that the fluid inlet and outlet (81, 82) of the irrigation system define a fluid flow within the casing in which the braking system (3) is downstream from the hydraulic machine (2).