Abstract: A method for binding a cylindrical part by the tensioned winding of fibers, the method including a preliminary step of passing the fibers around at least two braked tensioning cylinders in order to increase the tension in the fibers, wherein the method includes increasing the diameter of the cylinders as the tension in the fibers increases.

Abstract: Disclosed is a device for lubrication of a unit turning under vacuum, such as a flywheel, where the unit includes an axle rotating relative to a fixed bearing structure, via at least one bearing or roller, and where the unit is placed in an enclosure connected to a vacuum, with: a lubricant reservoir connected by pipes both to the bottom of the enclosure and also to the bearing; and fluid suitable circulator for connecting the reservoir either to the vacuum, for filling the reservoir from the enclosure by gravity, or to the atmosphere for lubricating the bearing. The fluid circulator includes a three-way valve connecting the reservoir either to the vacuum or to the atmosphere.

Abstract: A method for binding a cylindrical part by the tensioned winding of fibers, the method including a preliminary step of passing the fibers around at least two braked tensioning cylinders in order to increase the tension in the fibers, wherein the method includes increasing the diameter of the cylinders as the tension in the fibers increases.

Abstract: Disclosed is a flywheel intended for energy storage, including a cylindrical mass body including a main material with compression resistance of at least 25 MPa, such as concrete, the body being surrounded on at least one portion of the outer surface thereof with fibers, the material that makes up the fibers having a tensile strength of at least 100 Mpa. The tension of winding the fibers around the body leads to the compression of the main material, and the tension applied to the fibers is such that the stress exerted on the material of the mass body is at least equal to half of the maximum acceptable stress, the maximum stress being lower than the compression yield strength of the material that makes up the mass body, the material of the latter thus being pre-stressed.

Abstract: Energy storage device comprising a flywheel a stator arrangement and a housing. The flywheel, rotatably mounted around a rotation axis, comprises a shaft, a plurality of adjacent magnetic plates with magnetic poles, two kinetic plates, sandwiching the magnetic plates. The magnetic plates and kinetic plates are rotationally rigid with said shaft. The stator arrangement comprises a plurality of induction coils cooperating with the magnetic poles.

Abstract: Autonomous system for generating electricity comprising energy storage through an inertial flywheel. This system includes an engine/generator assembly having a heat engine, a mechanical speed variator, a clutch, a flywheel and a generator. The assembly composed of the clutch, the flywheel and the generator is placed in an evacuated enclosure so as to reduce energy losses. This system is intended to be installed directly in the buildings where the energy is used, such as for example, in detached houses. The system makes it possible to dispense with a link to the electrical economical in use than the systems of the same type which are already known.