Filament rotor having elastic sheaths covering the filamentary elements of the structure

• US 4,023,437 A
• Filed: 10/24/1975
• Issued: 05/17/1977
• Est. Priority Date: 10/24/1975
• Status: Expired due to Term

• Current Assignee: Johns Hopkins University
• Original Assignee: Johns Hopkins University
• Inventors: Rabenhorst, David W.
• Primary Examiner(s): Scott, Samuel
• Assistant Examiner(s): Heald, Randall
• Application Number:
  US05/625,582
• Time in Patent Office: 571 Days
• Field of Search: 74/572
• US Class Current: 74/572.12
• CPC Class Codes: F16F 15/305 made of plastics, e.g. fibre reinforced plastics [FRP] , i.e. characterised by their special construction from such materials
• CPC Class Codes: Y02E 60/16 Mechanical energy storage, e.g. flywheels or pressurised fluids
• CPC Class Codes: Y10T 74/212 Containing fiber or filament

Abstract

The invention generally relates to inertial energy storage devices formed of wound anisotropic material. In particular, the invention provides a disc-like flywheel formed of windings of anisotropic filaments wherein the filaments are provided with a relatively thin sheath of flexible material around each of the filaments, the flexible sheath providing positive contact between adjacent windings even during deformation of the windings caused by rotation of the structure.

Claims

1. An inertial energy storage device for rotation about a shaft comprising, in combination,

rotor means comprised of a plurality of annular rim elements formed of essentially anisotropic material having substantial tensile strength along longitudinal axes thereof;

and,

a layer of resilient material formed over full surface areas of the annular rim elements, surface portions of the layer covering adjacent rim elements being deformed toward the centers of the rim elements at least prior to rotation of the rotor means.

2. The inertial energy storage device of claim 1 wherein the layer of resilient material comprises a sheath of elastomeric material, the sheath essentially conforming to the shape of the annular rim elements, the layer of resilient material being thin relative to the diameter of the annular rim elements.

3. The inertial energy storage device of claim 1 and further comprising:

hub means for carrying the rotor means, the hub means being attached to the shaft.

4. The inertial energy storage device of claim 1 wherein said rim elements are formed of fiber composite material.

5. The inertial energy storage rotor device of claim 1 wherein said rim elements comprise filament windings.

6. The inertial energy storage rotor device of claim 1 wherein said rim elements are discrete rings.

7. The inertial energy storage device of claim 1 wherein the rim element comprise filament windings, windings beginning at the inner periphery of the rotor means and extending to the outer periphery thereof being wound back inwardly toward the shaft to a point of termination.

8. The inertial energy storage device of claim 7 wherein the point of termination lies on the inner periphery of the rim means.

9. The inertial energy storage device of claim 1 wherein certain of the rim elements are disposed within the rotor means at an angle to a plane normal to the shaft.

10. The inertial energy storage device of claim 9 wherein certain other rim elements are disposed at an equal angle to a plane normal to the shaft as said first-mentioned rim elements,

lines along which the second-mentioned rim elements extend having the negative slope of the lines along which the firstmentioned rim elements extend.

11. The inertial energy storage device of claim 10 wherein the first and second-mentioned rim elements lie alternately in successive layers extending radially from the shaft.

12. An inertial energy storage device for rotation about a shaft comprising, in combination,

rotor means comprised of a plurality of annular rim elements formed of essentially anisotropic material having substantial tensile strength along longitudinal axes thereof, the rim elements comprising filament windings, the windings beginning at the inner periphery of the rotor and extending means to the outer periphery thereof being wound back inwardly toward the shaft to a point of termination;

and,

resilient means formed over surface portions of the annular rim elements.

13. The inertial energy storage device of claim 12 wherein the point of termination lies on the inner periphery of the rotor means.