| 主权项 |
1. A fixed or variable displacement hydraulic motor-pump, characterized in that it comprises:
at least one motor-pump central rotor (3) that includes a central rotor power take-off (4) and that is housed on or in a motor-pump frame (2), said rotor (3) being able to rotate in at least one central rotor (5) comprised by said frame (2) while remaining in as sealed contact as possible with at least one input/output spool valve (43) kept approximately stationary relative to said frame (2), said spool valve (43) being able to connect at least one hydraulic cylinder (14) arranged radially or tangentially in said rotor (3) with at least one internal input/output duct (57) and at least one external input/output duct (58) via an internal input/output central rotor channel (15) and an input/output central rotor orifice (16) arranged in the motor-pump central rotor (3), respectively, one of the ends of said ducts (57, 58) being secured directly or indirectly and sealably in the motor-pump frame (2), while the other end of said ducts (57, 58) is sealably secured in the input/output spool valve (43); at least one hydraulic piston (13) able to move in translation in the hydraulic cylinder (14) and able to push a guided hydraulic piston plunger (18) or able to be pushed by the latter, said plunger (18) being guided in translation by a plunger guide (19) arranged radially or tangentially in the motor-pump central rotor (3); at least one tangential arm (22) whereof one end is articulated in the motor-pump central rotor (3) while the other end includes a tangential arm bearing face on plunger (23) that can exert a force on a plunger path of contact on the tangential arm (21) included by the guided hydraulic piston plunger (18), the direction of said force being approximately tangential to the axis of rotation of said arm (22); at least one motor-pump peripheral rotor (29) made up of at least one cylindrical peripheral rotor casing (32) whereof at least one end ends with a peripheral rotor flange (35), said peripheral rotor (29) being able to rotate in at least one peripheral rotor bearing (36) supported by a peripheral rotor stator (65) that is directly or indirectly secured to the motor-pump frame (2), the motor-pump central rotor (3) being completely or partially housed inside said peripheral rotor (29); at least anti-friction means (196) included by the tangential arm (22) on its face situated opposite the tangential arm bearing face on plunger (23), said means (196) bearing on the inner surface of the cylindrical peripheral rotor casing (32). |
