An apparatus for feeding or conveying grain includes (i) a conveyor for moving grain and having an input end and an output end, and (ii) a viscous clutch either directly or indirectly connected to the input end of the conveyor for transmitting torque from an input component to the conveyor in a variable manner. A method of feeding or conveying grain using the conveyor includes operating the viscous clutch to transmit torque from the input component to the conveyor.

An operating device includes a magnetic disk capable of rotational motion around a rotation axis, a first yoke located on one side and a second yoke located on an other side across the magnetic disk, a coil disposed to overlap the magnetic disk when viewed in a direction along a direction in which the rotation axis extends, a magnetic viscous fluid filled between the magnetic disk and each of the first yoke and the second yoke, a magnetic measurement portion for measuring magnetism caused by a magnetic field using the magnetic viscous fluid, the magnetic disk, the first yoke, and the second yoke as a magnetic path, and a control unit configured to acquire a measured value from the magnetic measurement portion and control a magnetic field that is generated by the coil based on the measured value to change a viscosity of the magnetic viscous fluid.

A cooling control system for a working machine includes a fan, a housing to which the fan is attached, a prime mover having an output shall, a rotor to be rotated by a rotating power of the output shaft and to be rotated with the housing by a fluid introduced to a gap formed between the housing and the rotor, a fluid setting circuit to set an introduction amount of the fluid introduced to the gap, and a control device to control the fluid setting circuit to control the fan. The control device includes a setting circuit to set a target rotation speed of the fan based on a responsiveness of an actual rotation speed of the fan at time of changing of the target rotation speed of the fan.

An operating device includes a magnetic disk capable of rotational motion around a rotation axis, a first yoke located on one side and a second yoke located on an other side across the magnetic disk, a coil disposed to overlap the magnetic disk when viewed in a direction along a direction in which the rotation axis extends, a magnetic viscous fluid filled between the magnetic disk and each of the first yoke and the second yoke, a magnetic measurement portion for measuring magnetism caused by a magnetic field using the magnetic viscous fluid, the magnetic disk, the first yoke, and the second yoke as a magnetic path, and a control unit configured to acquire a measured value from the magnetic measurement portion and control a magnetic field that is generated by the coil based on the measured value to change a viscosity of the magnetic viscous fluid.

A cooling control system for a working machine includes a fan, a housing to which the fan is attached, a prime mover having an output shall, a rotor to be rotated by a rotating power of the output shaft and to be rotated with the housing by a fluid introduced to a gap formed between the housing and the rotor, a fluid setting circuit to set an introduction amount of the fluid introduced to the gap, and a control device to control the fluid setting circuit to control the fan. The control device includes a setting circuit to set a target rotation speed of the fan based on a responsiveness of an actual rotation speed of the fan at time of changing of the target rotation speed of the fan.

A liquid cooled viscous fan clutch transfers torque from a driving plate driven by an engine crankshaft to a driven plate connected to a cooling fan. Heat generated in a working fluid is transferred to a second fluid, such as engine coolant or transmission fluid, flowing through a cooling jacket. The cooling jacket is located in a stationary housing which may be fixed to the engine. The working fluid circulates through a working zone, a passageway in the stationary housing, and a passageway in the driving plate. Rotation of the driving plate provides the motive force to circulate the fluid, independent of the rotation speed of the driven plate. A controllable valve may be closed to block circulation, trapping working fluid in a reservoir, to disengage the clutch.

An apparatus for feeding or conveying grain includes (i) a conveyor for moving grain and having an input end and an output end, and (ii) a viscous clutch either directly or indirectly connected to the input end of the conveyor for transmitting torque from an input component to the conveyor in a variable manner. A method of feeding or conveying grain using the conveyor includes operating the viscous clutch to transmit torque from the input component to the conveyor.

A liquid cooled viscous fan clutch transfers torque from a driving plate driven by an engine crankshaft to a driven plate connected to a cooling fan. Heat generated in a working fluid is transferred to a second fluid, such as engine coolant or transmission fluid, flowing between the driven plate and a stationary housing. A controllable valve may be closed to block circulation of working fluid, trapping working fluid in a reservoir, to disengage the clutch. Rotation of the driven plate provides the motive force to circulate the coolant or transmission fluid.

A liquid friction clutch (1) having a housing (2, 3), a clutch disc (4)rotatable relative to the housing (2, 3) and which is rotatably arranged on an end (5) of a shaft (6) which is mounted centrally within the housing (2, 3), which shaft (6) bears on its other end (8) a driveable active element (7). A working chamber (9) is positioned between the housing (2, 3) and the clutch disk (4). A storage chamber (10) is provided for the clutch fluid. A supply duct (11) leads from the storage chamber (10) to the working chamber (9). A stationary clutch part (13) relative to which the housing (2, 3) is rotatable, wherein a rotatably mounted pump element (14) is provided which, with the housing (2, 3), defines a shear gap (12).

A viscous clutch assembly includes a rotationally fixed center shaft, a rotor rotatably supported on the center shaft, a housing rotatably supported on the center shaft, a working chamber, a reservoir carried by the rotor, an electromagnetic coil located at or near a front end of the center shaft, a valve subassembly magnetically operable to control flow of a shear fluid between the reservoir and the working chamber, a flux guide extending axially across a cover of the housing, and a magnetic flux insulating material positioned adjacent to and radially inward from the flux guide. A flux circuit located forward of the rotor connects the electromagnetic coil and the valve subassembly and passes through the flux guide and the center shaft, with the magnetic flux insulating material at least partially surrounded by the flux circuit.