An arrangement includes an ejector and a rope, in particular steel rope or synthetic rope, for a forestry winch. The ejector has a rotational ejector roller over which the rope is guided and deflected, and at least one driven rotational pressure roller driven by a drive motor. The pressure roller, by a pressure force, presses the rope guided over the ejector roller onto the ejector roller, and a tangential force occurs between the driven pressure roller and the rope. The pressure roller is located on a cantilever arm so that the pressure roller can rotate around a pressure roller axis of rotation. The cantilever arm is mounted so that it can rotate around a cantilever arm axis of rotation. The cantilever arm axis of rotation is located in the vertical direction above a line of application of the tangential force.

An arrangement includes an ejector and a rope, in particular steel rope or synthetic rope, for a forestry winch. The ejector has a rotational ejector roller over which the rope is guided and deflected, and at least one driven rotational pressure roller driven by a drive motor. The pressure roller, by a pressure force, presses the rope guided over the ejector roller onto the ejector roller, and a tangential force occurs between the driven pressure roller and the rope. The pressure roller is located on a cantilever arm so that the pressure roller can rotate around a pressure roller axis of rotation. The cantilever arm is mounted so that it can rotate around a cantilever arm axis of rotation. The cantilever arm axis of rotation is located in the vertical direction above a line of application of the tangential force.

A hybrid winch system is disclosed, including but not limited to an electric winch; an electric generator for providing generator power to the electric winch; a battery for providing stored power to the electric winch; an anchor cable wound around a roller drum for the electric winch; an anchor attached to a distal end of the anchor cable; and a controller for applying the generator power and the stored power to the electric winch. A method for controlling the hybrid winch is also disclosed.

A method for operating a winch and a winch comprising a winch drum (20) for spooling a spoolable medium (10) for mooring a vessel, and a winch drive (30, 40, 41) configured to drive the winch drum (20), wherein, during the driving of the winch drum (20), at least when a monitored tension of the spoolable medium (10) is between a second upper tension threshold and a second lower tension threshold, an absolute value of the driving speed of the winch drum is configured to have a value that is proportional to an absolute value of a difference between the monitored tension of the spoolable medium and a predetermined tension set point.

For load compensation, different kinds of elastomeric load compensators are placed at various locations on the crane for increased flexibility and for shock and vibration absorption. The elastomeric load compensators employ elastomeric tension elements, elastomeric torsion elements, or elastomeric shear elements. Elastomeric tension elements can be simply inserted in series with the main hoist rope. An elastomeric load compensator employing elastomeric torsion elements is mounted to the underside of the boom for receiving the live end of the main hoist rope. A single stack of elastomeric shear elements is suitable for mounting a hoist or winch or an idler sheave to the crane structure. For additional load compensation, the hoist, winch, and idler sheaves are mounted on rails for increased displacements under heave loads, and the increased displacements are compensated by elongated elastomeric tension elements or multiple elastomeric tension, torsion or shear elements in series.

For load compensation, different kinds of elastomeric load compensators are placed at various locations on the crane for increased flexibility and for shock and vibration absorption. The elastomeric load compensators employ elastomeric tension elements, elastomeric torsion elements, or elastomeric shear elements. Elastomeric tension elements can be simply inserted in series with the main hoist rope. An elastomeric load compensator employing elastomeric torsion elements is mounted to the underside of the boom for receiving the live end of the main hoist rope. A single stack of elastomeric shear elements is suitable for mounting a hoist or winch or an idler sheave to the crane structure. For additional load compensation, the hoist, winch, and idler sheaves are mounted on rails for increased displacements under heave loads, and the increased displacements are compensated by elongated elastomeric tension elements or multiple elastomeric tension, torsion or shear elements in series.

A hybrid winch system for use with an anchor handling vessel is disclosed that includes but is not limited to an electric winch mountable on the anchor handling vessel, an electric generator for providing generated power to the electric winch, a battery for providing stored power to the electric winch, an anchor cable wound around the electric winch and passing over a roller drum for guiding the anchor cable, an anchor attached to a distal end of the anchor cable and a winch controller for selectively applying the generated power and the stored power to the electric winch. The winch controller is configured to provide the stored power to the electric winch for controlled release of the anchor cable in the case of loss of the generated power.

A cable spooling apparatus for use with a storage drum for spooling and storing cable. The cable spooling apparatus comprises a tensioning unit for adjusting the tension of a cable as it is being spooled onto the storage drum. The tensioning unit traverses a path between the opposite ends of the storage drum. Methods of spooling and unspooling cable using the apparatus are also disclosed.

A cable spooling apparatus for use with a storage drum for spooling and storing cable. The cable spooling apparatus comprises a tensioning unit for adjusting the tension of a cable as it is being spooled onto the storage drum. The tensioning unit traverses a path between the opposite ends of the storage drum. Methods of spooling and unspooling cable using the apparatus are also disclosed.

A method for influencing a cable winch force acting on a cable drive, comprises the method steps providing a cable drive with a drivable winch and with a cable that can be wound on the winch, providing a device for producing a traction sheave cable force on the cable, determining an outer cable force, predetermining a cable drive operating state, providing a control-regulating unit to influence the traction sheave cable force, producing a control-regulating variable by means of the control-regulating unit depending on the outer cable force and the predetermined cable drive operating state, producing the traction sheave cable force by means of the device and influencing the traction sheave cable force by means of the control-regulating unit in such a way that the cable winch force acting on the cable drive can be controlled depending on the respective cable drive operating state and the outer cable force, wherein the device is a traction sheave drive, wherein a four-quadrant operation of the traction sheave drive is reproduced by means of the control-regulating unit, and wherein the four traction sheave drive operating states are no-load lifting, no-load lowering, load lifting and load lowering.