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US 2015/0211599 A1Published application
Flywheel energy store
AssigneeENRICHMENT TECHNOLOGY DEUTSCHLAND GmbH
InventorThomas Baümer
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AssigneeENRICHMENT TECHNOLOGY DEUTSCHLAND GmbH
InventorThomas Baümer
Estimating the term…
The invention relates to a hub (1) for rotors (2) for flywheel energy stores (3), a rotor (2) having such a hub (1), a flywheel energy store (3) having such a rotor (2), and a method for producing such a hub (1). The hub (1) is produced as one piece from a carbon-fiber-reinforced plastic laminate (14) having a network (15) of carbon fibers (15a, 15b, 15c) that cross at a weaving angle (F) and having a matrix material (16) and comprises at least three geometrically different sections (1a, 1b, 1c), wherein a first section (1a), intended to accommodate a journal (21, 22) to be supported in a bearing (31, 32) of the flywheel energy store (3), extends parallel to the intended axis of rotation (R) of the hub (1) in the form of a cylinder having a first diameter (D1), a second section (1b), intended to be connected to a rotational body (23) of the rotor (2), extends parallel to the intended axis of rotation (R) of the hub (1) in the form of a cylinder having a second diameter (D2) greater than the first diameter (D1), and the first and second sections (1a, 1b) are connected to each other by means of a conical third section (1c) having a constant wall slope and wherein the carbon-fiber-reinforced plastic laminate has an extensibility that is matched to the extension of the rotational body (23) under operating conditions of the flywheel energy store (3).
A hub (1) for rotors (2) for flywheel energy storage devices (3), whereby the hub (1) is made in one single piece of a carbon fiber-reinforced plastic laminate (14) consisting of a woven braid (15) of carbon fibers (15a, 15b, 15c) that intersect at a braid angle (FL) and consisting of a matrix material (16), and it comprises at least three geometrically different sections (1a, 1b, 1c), whereby a first section (1a)—with its first diameter (D1)—provided for accommodating a journal (21, 22) that is to be mounted in a bearing (31, 32) of the flywheel energy storage device (3) extends cylindrically parallel to the provided rotational axis (R) of the hub (1), a second section (1b)—with its second diameter (D2) that is greater than the first diameter (D1)—provided for connection with the rotary element (23) of the rotor (2) extends cylindrically parallel to the provided rotational axis (R) of the hub (1), and the first and second sections (1a, 1b) are connected to each other by means of a conically shaped third section (1c) having a constant wall gradient and whereby the carbon fiber-reinforced plastic laminate has an extensibility that is adapted to the elongation of the rotary element (23) under the operating conditions of the flywheel energy storage device (3).
The hub (1) according to one of the preceding claims, characterized in that the carbon fibers (15a, 15b, 15c) in the carbon fiber-reinforced plastic laminate (14) are striated fibers having a surface running parallel to the surface of the carbon, fiber-reinforced plastic laminate (14), and the carbon fibers (15a, 15b, 15c) are arranged at a fiber angle (FW) within the range from −60° to −60° relative to the rotational axis (R).
The hub (1) according to one of the preceding claims, characterized in that the carbon fiber-reinforced plastic laminate (14) consists of several layers (L1, L2, L3, L4) of the appertaining woven braid (15) made of carbon fibers (15a, 15b, 15c), preferably 3 to 5 layers.
The hub (1) according to one of the preceding claims, characterized in that the matrix material (16) is an epoxy resin or a polyurethane resin.
Dependencies are inferred from the claim text.