General properties and features of KM 22 - KM 110 motors Design: Hydrostatic radial piston motor. Purpose: transformation of hydraulic power to drive power. High efficiency, also suitable for very low speeds, low moment of inertia, rapidly reversible, capable of supporting high total loads, four-quadrant operation ossible, very suitable for applications as a control, extremely quiet operation. Structure and function Drive unit Design: Internal piston support Method of functioning: Seven, fourteen or twentyone radial pistons (14) load the crankshaft (7) via heptagon rings (15) with needle bearing cages (4). Drive details Crankshaft bearing: Pre-loaded, large taper roller bearings (17,18), in X arrangement. Precise guidance, therefore quiet running, high radial and axial loading capacity (e.g. if a gear wheel is mounted at the shaft end). Transmission of force between the pistons (14) and the crankshaft (7): via heptagon ring (15) with needle bearing cage (4). Low frictional losses, very long service life, relatively insensitive to dirt, also suitable for extremely high pressure and speed, high starting torque, no stickslip effect at low speeds, only minor leakage (necessary for the lubrication and cooling of the drive), high efficiency. Control Design: Planar translationally moving distributor with clearance seal to prevent internal leakage and with play self-adjusting seal to prevent leakage to the outside. Purpose: Distribution of the volume feed to the cylinders, collection of the return volume flow. Method of functioning: The control disc (6) has an integrated internal ring space and forms an external ring space in conjunction with ring (10). By moving the control disc (6) between the motor housing (1) and the end cover (8) by means of the eccentric (5) which is fixed to the crankshaft (7), the internal and the external ring spaces are connected to the cylinders in turn. The ring spaces themselves are connected to the outside through pressure connections to the motor. Control details Needle bearing cage (27) between control disc (6) and eccentric (5): The control disc (6) mainly moves translationally, however, rotation is possible (2 degrees of freedom) – this means small frictional losses at the control disc (6) and a cleaning effect in the sealing gap, approximately equal relative speeds of the sealing faces, sinusoidal opening function for the control openings – this means smooth running even at low speeds and quiet running at high speeds, large volume flow diameters between the rollers (27) in the roller bearing. Play self-adjusting seal against leakage to the outside: Low hydrostatic force of the thrust piece (24) against the control disc (6) supported by the spring washer (35). Reduction in the leakage to the outside at only low frictional losses, automatic compensation for pressure or temperature influences, relatively insensitive to dirt. LSHT Hydraulic Motors KM11 - RM250N Radial Piston Motors 4 www.jbj.co.uk/hydraulic-motors.html #DriveLineHarmony
RkJQdWJsaXNoZXIy NzQyNjQ=