A gyroscopic roll stabilizer includes a gimbal having a support frame and enclosure configured to maintain a below-ambient pressure, a flywheel assembly including a flywheel and flywheel shaft, one or more bearings for rotatably mounting the flywheel inside the enclosure, a motor for rotating the flywheel, and bearing cooling system for cooling one or more bearings supporting the flywheel. The bearing cooling system enables heat generated by the bearings to be transferred through the flywheel shaft to a heat sink disposed within a cavity in the end of the flywheel shaft, and then external to the enclosure.

A torsional damper disposed between a rotor sleeve, which is configured to receive a rotational force of an engine, and a rotor hub, which is disposed rearward of the rotor sleeve, and configured to transmit the rotational force of the engine to the rotor hub, and a hybrid drive module to which the torsional damper is applied, includes: a first damper, and the first damper includes a first cover plate provided at a driving side and having a first stopper, a first stopper accommodation portion provided at a driven side and configured to accommodate the first stopper, and shield members configured to cover an opening of the first stopper accommodation portion to restrict a movement of a fluid in a radial direction through the first stopper accommodation portion.

The invention relates to an actuator for an orthopedic device with an actuator housing and a heat store for storing the heat produced during operation of the actuator, the heat store having a heat store housing that has a cavity and a heat storage medium present therein, or consisting of a heat storage medium. The heat store is designed to be attachable to or in the actuator housing and has a receiving region that matches an actuator housing region and, when the heat store is mounted, is in heat-transferring contact with the actuator housing.

A gyroscopic roll stabilizer comprises a gimbal having a support frame and enclosure configured to maintain a below-ambient pressure, a flywheel assembly including a flywheel and flywheel shaft, one or more bearings for rotatably mounting the flywheel inside the enclosure, a motor for rotating the flywheel, and bearing cooling system for cooling the bearings supporting the flywheel. For smaller units, the bearing cooling system is effective to enable a flywheel with a moment of inertia less than 40,000 lb in.sup.2 to be accelerated at a rate of 5 rpm/s or greater. For larger units, the bearing cooling system is effective to enable a flywheel with a moment of inertia greater than 40,000 lb in.sup.2 to be accelerated at a rate of 2.5 rpm/s or greater.

A gyroscopic roll stabilizer comprises a gimbal having a support frame and enclosure configured to maintain a below-ambient pressure, a flywheel assembly including a flywheel and flywheel shaft, one or more bearings for rotatably mounting the flywheel inside the enclosure, a motor for rotating the flywheel, and bearing cooling system for cooling the bearings supporting the flywheel. For smaller units, the bearing cooling system is effective to enable a flywheel with a moment of inertia less than 40,000 lb in.sup.2 to be accelerated at a rate of 5 rpm/s or greater. For larger units, the bearing cooling system is effective to enable a flywheel with a moment of inertia greater than 40,000 lb in.sup.2 to be accelerated at a rate of 2.5 rpm/s or greater.

The invention relates to an oscillation damper which is in particular suitable for wind turbines and which is based on the eddy current principle and is temperature-controlled in such a way that it can not only effectively dissipate the heat generated by the eddy current but can also effectively and self-adjustingly compensate for the damping loss occurring at higher temperatures.