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公开(公告)号：US11512702B2
公开(公告)日：2022-11-29
申请号：US16925126
申请日：2020-07-09
Applicant: GRUNDFOS HOLDING A/S
Inventor： Allan Hjarbæk Holm , Morten Vammen Ørsnæs , Lars Østergaard
Abstract: A submersible pump assembly includes an electric motor (1) and a centrifugal pump, which is driven by the electric motor (1). A rotor (4) formed of plastic or composite material which is manufactured in the extrusion or pultrusion method.
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公开(公告)号：US10024323B2
公开(公告)日：2018-07-17
申请号：US14443559
申请日：2013-11-19
Applicant: Aarhus Universitet , Grundfos Holding A/S , SP Group A/S
Inventor： Mogens Hinge , Kim Daasbjerg , Steen Uttrup Pedersen , Joseph Iruthayaraj , Kristoffer Malmos , Allan Hjarbæk Holm , Jens Hinke , Susie-Ann Spiegelhauer
IPC: F04D13/06 , B29C65/48 , C08J5/06 , B29C45/14 , B29C65/82 , B29C65/00 , B29C65/02 , C08J5/12 , B29C65/16 , B29C65/44 , B29C65/52 , B29L31/00
Abstract: The present invention relates to alternative methods of joining a solid part (1) and a polymer (2). The methods comprise attaching a primer layer (4) with a predetermined surface chemistry, density and thickness covalently to at least a part of a surface (3) of the solid part (1). Some embodiments of the invention further comprise polymerizing second molecules onto the primer layer (4) so that the surface (3) is at least partly covered with surface immobilized polymer brushes (8). The surface (3) of the solid part (1) is brought into contact with the polymer (2) and a predetermined temperature profile is applied resulting in covalent bonds (6) being established between the polymer (2) and the primer (4), and/or polymer brushes (8) melting or softening and entangling with melted or softened polymer (2) so that the solid part (1) and the polymer (2) remain joined after cooling. The obtained strength of the bonding between the solid part (1) and the polymer (2) is significantly higher than if the same materials are joined with conventional methods not comprising the establishment of a primer layer (4).
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