The invention relates to a device for damping vibrations in a structure, comprising a first element (2) rotatably mounted around a rotational axis (3) and a second element (4) rotatably mounted around said rotational axis (3), a radius (R1) of a circle portion (10) delimitating the first element with respect to the rotational axis, being smaller than a radius (r2) of a circle portion (16) delimitating the second element with respect to the rotational axis, the first element being called inner element, and the second element being called outer element.

A balancer abnormality detection system includes: a robot; a motor configured to operate the robot; a balancer provided in the robot and configured to generate assist torque which assists power of the motor with force generated by elastic bodies; and a controller configured to detect abnormality of the balancer by measuring a current value of the motor operated to keep a posture of the robot during standby of the robot and comparing the current value with a current command value of the motor necessary for keeping the posture of the robot.

An internal combustion engine includes a crankshaft having a first end and a second end opposite the first end. The crankshaft defines a crank axis and is rotatable about the crank axis. The internal combustion engine also includes a camshaft that defines a camshaft axis and is rotatable about the camshaft axis. The internal combustion engine further includes a cam drive assembly that is operable to transfer rotation from the crankshaft to the camshaft, a balance mass rotatable about the crankshaft, and a balancer drive assembly operable to drive the balance mass through the cam drive assembly.

A weight applicator including a weight applicator head and at least one actuator is disclosed. The weight applicator head is adapted to carry a wheel balance weight and has a weight application surface with a weight retaining region and a leading rotation region. The at least one actuator is coupled to the weight applicator head for manipulating the weight applicator head in at least one direction. The at least one direction has a radial component. The leading rotation region is oriented to extend radially further than the weight retaining region.

A method for stabilizing transversal oscillations of a rotor including the steps of acquiring a first signal representing a value of transversal oscillations of a rotor; estimating a value of a thermal gradient from the first signal; computing a value of an actuation parameter from the value of thermal gradient; emitting an actuation signal representing the value of the actuation parameter.

Systems and methods for reducing inertial forces of a reciprocating piston internal combustion engine are described. The systems and methods may provide for counterweights in a form of pistons in cylinders that are moved via electromagnets. The counterweights may be moved at a frequency that corresponds to engine speed via an alternating current.

A fluid damping structure is provided that includes an inner and outer annular elements, first and second ring seals, first and second outer annular seals. The inner annular element has an outer radial surface and a plurality of annular grooves disposed in the outer radial surface. The outer annular element has an inner radial surface. A damping chamber is defined by the inner and outer annular elements, and the first and second inner ring seal. A first lateral chamber is disposed on a first axial side of the damping chamber. A second lateral chamber is disposed on a second axial side of the damping chamber. A plurality of fluid passages are disposed in at least one of the inner annular element or the inner ring seals. The fluid damping structure is configurable in an open configuration and a closed configuration.

A mass flow controller includes an inlet, a flow path in which fluid passes, a mass flow sensor configured to provide a signal corresponding to mass flow of the fluid through the flow path; a control valve configured to regulate a flow of the fluid out of an outlet of the mass flow controller; and a passive damping system coupled to the control valve and configured to dissipate fluid flow induced vibrations introduced by the control valve assembly. The passive damping system includes a damping pad between a receiver section of a valve base and a diaphragm backer. The passive damping system can also include a damping washer. The passive damping system can include one or more plunger balls between the damping pad and the valve base or one or more wave springs.

An additional wheel weight for a utility vehicle includes a weight plate and a retention member configured to be fitted to a wheel and on which the weight plate is guided in a longitudinally axial manner. A clamping lever closure is disposed between the weight plate and retention member. A first assembly element of the clamping lever closure is coupled to the retention member, a second assembly element of the clamping lever closure engages the weight plate in a longitudinally axial manner, and a lever mechanism is disposed between the first and second assembly elements. The lever mechanism includes a clamping element being releasably secured to the first assembly element and an actuation lever being articulated between the second assembly element and the clamping element.

A rotary device includes a first rotor, a second rotor, and an unbalanced portion. The first rotor is configured to be rotated about a rotational center. The second rotor is disposed to be concentric to the first rotor. The second rotor is rotatable relative to the first rotor within a predetermined angular range. The second rotor is radially supported with respect to the first rotor. The unbalanced portion is provided on the second rotor in order to deviate a center of gravity of the second rotor from the rotational center in a single direction.