Disclosed is a hydraulic damping device level riding platform with adjustable resistance, which comprises a frame body, a shaft mechanism, a flywheel and a hydraulic damping mechanism, the shaft mechanism is arranged on the frame body, one end of the shaft mechanism is connected with the hydraulic damping mechanism and another end of the shaft mechanism is connected with the flywheel. The hydraulic damping mechanism comprises: a cavity; a rotating disc provided with blades, the rotating disc is arranged in the cavity; and a liquid level height adjusting mechanism movably connected inside the cavity to control a liquid level height in the cavity. The liquid level height of the liquid in the cavity is controlled through the liquid level height adjustment mechanism, so as to realize the control of the resistance of the rotating disc to the liquid.

Disclosed is a hydraulic damping device level riding platform with adjustable resistance, which comprises a frame body, a shaft mechanism, a flywheel and a hydraulic damping mechanism, the shaft mechanism is arranged on the frame body, one end of the shaft mechanism is connected with the hydraulic damping mechanism and another end of the shaft mechanism is connected with the flywheel. The hydraulic damping mechanism comprises: a cavity; a rotating disc provided with blades, the rotating disc is arranged in the cavity; and a liquid level height adjusting mechanism movably connected inside the cavity to control a liquid level height in the cavity. The liquid level height of the liquid in the cavity is controlled through the liquid level height adjustment mechanism, so as to realize the control of the resistance of the rotating disc to the liquid.

A vibration attenuator has a first spinner configured for rotation about a first axis and a first mass coupled to the first spinner for rotation therewith, the first mass being movable radially relative to the first axis between an inner position and an outer position. An actuator is coupled to the first mass for selectively controlling a radial location of the first mass relative to the axis, and a first motor is configured for driving the first spinner in rotation about the first axis.

A vibration attenuator has a first spinner configured for rotation about a first axis and a first mass coupled to the first spinner for rotation therewith, the first mass being movable radially relative to the first axis between an inner position and an outer position. An actuator is coupled to the first mass for selectively controlling a radial location of the first mass relative to the axis, and a first motor is configured for driving the first spinner in rotation about the first axis.

A vibration damping device which is able to damp vibration of a rotating body in a high-speed range and to certainly accelerate the rotating body to the high-speed range is provided. A vibration damping device 1 damping vibration of a rotating body 100 includes an automatic balancer 2 which is configured to cancel out imbalance of the rotating body 100 when the rotating body rotates 100; a liquid damper 4 which is coaxially rotatable with the rotating body 100 and includes a collision member 23 provided in a casing 20 in which liquid 22 is sealed, the liquid colliding with the collision member 23 when the liquid 22 moves in a circumferential direction; and a relative rotation unit 5 which is configured to cause the liquid damper 4 to rotate relative to the rotating body 100.

An object of the present invention is to provide a torsion damper excellent in dynamic damping effect even when a vibration frequency fluctuates. A craft damper (torsion damper) of the present invention includes a crankshaft (shaft member) to be input with a torsion vibration, a disc member coaxially attached to the crankshaft, a ring-shaped inertia mass body connected to an outer peripheral side of the disc member via a magneto-rheological elastomer member so as to be coaxial with the crankshaft, and an electromagnetic coil for applying a magnetic field to the magneto-rheological elastomer member.

A pump system may include a pump, a driveshaft, driving equipment, and a vibration dampening assembly configured to reduce pump-imposed high frequency/low amplitude and low frequency/high amplitude torsional vibrations. The pump may have an input shaft connected to the driveshaft. The driving equipment may include an output shaft having an output flange connected to the driveshaft. The driving equipment may be configured to rotate the driveshaft to rotate the input shaft of the pump therewith. The vibration dampening assembly may include one or more flywheels operably connected to the input shaft and configured to rotate therewith.

A damper unit for an elevator, for the purpose of reducing vertical vibration of a stopping elevator car, has at least one roller that, in an active position, is in contact with a guide rail for the elevator car and can be rotated about an axis of rotation. For damping rotary movements during vertical vibration of the stopping elevator car, the roller is connected to a rotation damper.

A dynamic damper device for absorbing a torsional vibration includes a rotary part, an inertia part, and an elastic part. The rotary part is a part to which the torsional vibration is transmitted, and is rotatable about a rotational center. The inertia part is provided on the rotary part so as to be movable in a radial direction with respect to the rotary part by a centrifugal force and be movable in a circumferential direction with respect to the rotary part by the torsional vibration. The elastic part couples the rotary part and the inertia part.

The invention relates to a torsional vibration damper, in particular a dual-turbine damper, for a drivetrain of a motor vehicle, preferably for a drivetrain of a motor vehicle having a hydrodynamic torque converter, having a first damper and a second damper connected to the latter in series, where the two dampers are situated essentially on a common circumference or essentially in a common plane of the torsional vibration damper, there being a damper intermediate mass connected between the two dampers connected in series, and a centrifugal pendulum device provided on the damper intermediate mass.