An engine assembly defining an axial direction (A) and including a gearbox, an engine core including at least one rotor, and a flexible coupling shaft having a first end and a second end along the axial direction (A). The first end of the flexible coupling shaft is connected to the engine core and the second end of the flexible coupling shaft is connected to the gearbox. A damper system is positioned at the second end of the flexible coupling shaft. The damper system is configured to reduce vibrations to the flexible coupling shaft during operation of the engine assembly.

A drive device including at least one motor and at least one additional drive component from the group of a transmission, a torque converter, a clutch and/or a brake, wherein the at least one motor and/or the at least one additional drive component includes a control means which changes the torque transmission and which includes at least one illuminant and a material that influences the torque transmission and that includes at least one light-stabilized dynamic material (LSDM). The control means is configured to change the torque transmission by actuating the illuminant, which radiates onto the light-stabilized dynamic material (LSDM). A robot includes at least one such drive device.

A cartridge pin assembly in a track chain assembly includes a sleeve bearing having a flared end.

A cartridge pin assembly in a track chain assembly includes a sleeve bearing having a flared end.

A system including: a journal bearing having a carrier, a rotor arranged rotatable about a rotational axis relative to the carrier, and a fluid in a clearance between the rotor and the carrier. A sensor measures a vibration signal of the rotor. A control system is adapted to determine a pressure set point for the fluid in the clearance based on the vibration signal, and to provide control signals generated based on the pressure set point. An active device is adapted to modify the pressure of the fluid in the clearance based on the control signals.

The stub shaft bearing for a stub shaft can be replaced while the stub shaft remains installed in a hydroelectric unit. A runner hub lifting device may be positioned within a discharge ring surrounding a runner hub. The runner hub lifting device may lift the runner hub, and a stub shaft bearing may be removed from a stub shaft. The stub shaft bearing may be disassembled into bearing sections while located in a chamber in the hydroelectric unit. The bearing sections may be removed from the chamber through a service hatch in the chamber. A replacement stub shaft bearing may be moved into the chamber and installed on the stub shaft. The runner hub lifting device may lower the runner hub.

A self-lubricating tie-down includes a frame including two walls, a reel, two ratchet wheels, two detents, a short strap and a long strap. The frame includes two walls each of which is formed with a bushing. The handle includes two blades each of which is formed with an aperture. The reel includes two terminal sections inserted in the bushings. The two ratchet wheels are connected to the reel. The first detent is movable on the frame and operable for engagement with the ratchet wheels. The second detent is movable on the handle and operable for engagement with the ratchet wheels. The short strap includes an end connected to the frame. The long strap includes an end connected to the reel so that the reel is operable to wind the long strap. Each of the bushings includes at least one recess and lubricant filled in the recess.

A self-lubricating tie-down includes a frame including two walls, a reel, two ratchet wheels, two detents, a short strap and a long strap. The frame includes two walls each of which is formed with a bushing. The handle includes two blades each of which is formed with an aperture. The reel includes two terminal sections inserted in the bushings. The two ratchet wheels are connected to the reel. The first detent is movable on the frame and operable for engagement with the ratchet wheels. The second detent is movable on the handle and operable for engagement with the ratchet wheels. The short strap includes an end connected to the frame. The long strap includes an end connected to the reel so that the reel is operable to wind the long strap. Each of the bushings includes at least one recess and lubricant filled in the recess.

A guide device includes: a metal component provided with a friction surface intended to receive a mating part in sliding frictional contact; and a detection sensing system of a wear of the friction surface or of a clearance between the friction surface and the mating part. The detection system includes one or more sensors; and a wireless communication system is connected to the detection system and configured to transmit information relating to wear or clearance out of the guide device.

A guide device includes: a metal component provided with a friction surface intended to receive a mating part in sliding frictional contact; and a detection sensing system of a wear of the friction surface or of a clearance between the friction surface and the mating part. The detection system includes one or more sensors; and a wireless communication system is connected to the detection system and configured to transmit information relating to wear or clearance out of the guide device.