An example flywheel energy storage device includes a fiber-resin composite shell having an elliptical ovoid shape. The example device also includes an axially oriented internal compressive support between the axial walls of the shell. The example device also includes an inner boss plate and an outer boss plate on each side of the shell. The example device also includes a plurality of radially oriented, fiber-resin composite helical wraps forming the shell and coupling the shell to the inner and outer boss plates for co-rotation and torque transfer. The example device also includes boss plate attachments on internal boss plate supports to mount the shell for co-rotation and torque transfer via resin bonding, friction, and compression between the inner and outer boss plates.

Flywheel system properties are enhanced with rim designs that control stress at operational rotational velocities. The tensile strength of fiber-resin composites can be aligned with radial forces to improve radial stress loading. Loops with composite casings can be arranged around the flywheel circumference with a majority of the fibers being aligned in the radial direction. The loops can enclose masses that contribute to energy storage in the flywheel system. Masses can be arranged around the hub circumference with a hoop wound composite casing enclosing the masses and hub. The masses subjected to radial forces are radially displaced with increasing rotational velocity and can provide compressive force to the fiber-resin composite to contribute to maintaining composite integrity. With the alignment of fibers in hoop or radial directions, higher loading permits increase rotational velocities, which can significantly add to the amount of energy stored or produced with the flywheel.

Flywheel system properties are enhanced with rim designs that control stress at operational rotational velocities. The tensile strength of fiber-resin composites can be aligned with radial forces to improve radial stress loading. Loops with composite casings can be arranged around the flywheel circumference with a majority of the fibers being aligned in the radial direction. The loops can enclose masses that contribute to energy storage in the flywheel system. Masses can be arranged around the hub circumference with a hoop wound composite casing enclosing the masses and hub. The masses subjected to radial forces are radially displaced with increasing rotational velocity and can provide compressive force to the fiber-resin composite to contribute to maintaining composite integrity. With the alignment of fibers in hoop or radial directions, higher loading permits increase rotational velocities, which can significantly add to the amount of energy stored or produced with the flywheel.

Provided is a damper device enabling to exert stable vibration damping performance over a wide range of rotational speed regardless of environmental changes. A damper device attached to a rotating shaft to suppress amplitude at resonance of the rotating shaft, includes: a damper housing formed annularly and concentrically with the rotating shaft; a plurality of mass bodies annularly arranged around the rotation shaft inside of the damper housing and configured to be movable in the diameter direction by centrifugal force; an annular elastic body, formed of a circular spring-shaped elastic body abutting on the outside of the plurality of the mass bodies, so as to bias the mass body inward; and a biasing member, being a leaf spring-shaped elastic body abutting on the outside of the annular elastic body, so as to bias the annular elastic body inward.

Provided is a damper device enabling to exert stable vibration damping performance over a wide range of rotational speed regardless of environmental changes. A damper device attached to a rotating shaft to suppress amplitude at resonance of the rotating shaft, includes: a damper housing formed annularly and concentrically with the rotating shaft; a plurality of mass bodies annularly arranged around the rotation shaft inside of the damper housing and configured to be movable in the diameter direction by centrifugal force; an annular elastic body, formed of a circular spring-shaped elastic body abutting on the outside of the plurality of the mass bodies, so as to bias the mass body inward; and a biasing member, being a leaf spring-shaped elastic body abutting on the outside of the annular elastic body, so as to bias the annular elastic body inward.

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.

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.

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.

The invention relates to a mass-decoupling device for a motor vehicle, having: a mass-receiving element (10) and a mass object (11) accommodated therein, which mass-receiving element (10) and mass object (11) are point symmetrically formed and mounted opposite a body (36) of the motor vehicle; at least one guide means (13) that moveably mounts the mass-receiving element (10) and the mass object (11) accommodated therein along a longitudinal axis (L) of the vehicle; decoupling means (14) designed to decouple the mass-receiving element (10) and the mass object (11) accommodated therein from the body (36) of the motor vehicle; first energy-receiving means (15) designed to transmit kinetic energy of a movement of the mass-receiving element (10) and the mass object (11) accommodated therein to the body (36) of the motor vehicle in a predetermined time interval, said movement occurring along the longitudinal axis (L) of the vehicle, from a first position (P1) to a second position (P2); and second energy receiving means (16) designed to convert, at least partially, the kinetic energy of the movement of the mass-receiving element (10) and the mass object (11) accommodated therein along the longitudinal axis (L) of the vehicle into kinetic energy of a rotation of the mass object (11). The invention also relates to a corresponding method for decoupling mass for a motor vehicle.