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US 11,973,377 B2Granted
Process for applying fiber-reinforced plastic sleeves
AssigneeAlbany Engineered Composites, Inc.
InventorsRalph Funck, Jens Jung, Martin Welsch
Life of this patent
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Abstract
Disclosed is a method and a system for pretensioning fiber-reinforced plastic (FRP) sleeves surrounding an assembly of parts. The method includes application of pretensioning FRP sleeves surrounding a permanent magnet rotor with surface magnets.
Claims17
A method of pretensioning a fiber-reinforced plastic (FRP) sleeve surrounding an assembly, comprising:
- disposing the assembly within the FRP sleeve, the assembly having at least two parts;
- introducing a molding compound into at least one portion within the FRP sleeve to urge one of the at least two parts of the assembly toward an inner surface of the FRP sleeve, the molding compound introduced at a desired first pressure (P), first temperature (T), and first mass flow ({dot over (m)});
- and pretensioning the FRP sleeve by hardening the molding compound while maintaining the first pressure.
A method of pretensioning a fiber-reinforced plastic (FRP) sleeve surrounding an assembly, comprising:
- disposing the assembly within the FRP sleeve, the assembly having at least two parts;
- disposing the assembly and FRP sleeve in a fixture, the fixture configured to provide a conduit to at least one portion within the FRP sleeve and configured to provide a circumferential gap between the sleeve and fixture prior to introduction of a molding compound;
- introducing the molding compound into the at least one portion within the FRP sleeve to urge one of the at least two parts of the assembly toward an inner surface of the FRP sleeve, the molding compound introduced at a desired first pressure (P), first temperature (T), and first mass flow ({dot over (m)});
- and pretensioning the FRP sleeve by hardening the molding compound while maintaining the first pressure;
- removing the assembly from the fixture after hardening of the molding compound;
- and
- detaching a sprue from the at least one portion.
4 more elements
A method of pretensioning a fiber-reinforced plastic (FRP) sleeve surrounding an assembly, comprising:
- disposing the assembly within the FRP sleeve, the assembly having at least two parts;
- wherein the assembly is a permanent magnet (PM) rotor and the at least two parts are a surface magnet mounted on a rotor and concentric with an axis of rotation of the rotor;
- wherein a portion within the FRP sleeve is a first cavity and another portion within the FRP sleeve is a second cavity that is circumferential and located between the surface magnet and the FRP sleeve;
- and
- disposing the assembly and FRP sleeve in a fixture, the fixture configured to provide a first conduit to the first cavity and a second conduit to the second cavity and comprising a circumferential gap between the FRP sleeve and fixture prior to introduction of a molding compound;
- introducing the molding compound into the first cavity within the FRP sleeve to urge one of the at least two parts of the assembly toward an inner surface of the FRP sleeve, the molding compound introduced at a desired first pressure (P), first temperature (T), and first mass flow ({dot over (m)});
- and pretensioning the FRP sleeve by hardening the molding compound while maintaining the first pressure;
- introducing the molding compound into the second cavity to urge away an inner surface of the FRP sleeve from one of the at least two parts of the assembly, the molding compound introduced at a desired second pressure (P), second temperature (T), and second mass flow ({dot over (m)});
- and
- hardening the molding compound while maintaining the second pressure;
- removing the assembly from the fixture after hardening of the molding compound;
- detaching a first sprue from the first cavity;
- and
- detaching a second sprue from the second cavity,
- wherein the pretension is sufficient to oppose a rotational force on the surface magnet based on a rotational speed of the PM rotor.
12 more elements
Dependencies are inferred from the claim text.