Perforated vacuum membrane for fibre reinforced laminates
AssigneeSiemens Aktiengesellschaft
InventorPeter Kybelund
Life of this patent
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Abstract
A composite component for a wind turbine blade is provided. The composite component includes a stack of at least one fiber layer and a membrane which has a first surface and a second surface which is an opposite surface with respect to the first surface. The membrane is arranged with the first surface on top of the stack. The membrane is perforated with openings, wherein the membrane is formed in such a way that the openings are permeable for a fluid flowing along a first direction directing from the first surface to the second surface and impermeable for a fluid flowing along a second direction directing from the second surface to the first surface.
Claims16
A composite component for a wind turbine blade, wherein the composite component is configured to form at least part of the wind turbine blade, the composite component comprising:
- a stack of at least one fibre layer, and
- a membrane which has a first surface and a second surface which is an opposite surface with respect to the first surface,
- wherein the membrane is arranged with the first surface on top of the stack,
- wherein the membrane is perforated with openings,
- wherein the membrane is formed such that the openings are
- permeable for a fluid flowing along a first direction directed from the first surface to the second surface, and
- impermeable for a fluid flowing along a second direction directed from the second surface to the first surface
- wherein the membrane comprises at least one elastic seal lip surrounding one of the openings at the second surface
- wherein the elastic seal lip is formed such that
- the seal lip is pressed together to close the respective opening if a second pressure (Pb) of the fluid applied at the first surface is lower than a first pressure (Pa) of the fluid applied at the second surface, and
- the seal lip is elastically deformed and edges of the seal lip are bent away from the respective opening to open the respective opening if the second pressure (Pb) of the fluid applied at the first surface is higher than the first pressure (Pa) of the fluid applied at the second surface.
A composite component for a wind turbine blade, wherein the composite component is configured to form at least part of the wind turbine blade, the composite component comprising
- a first stack of at least one fibre layer,
- a second stack of at least one fibre layer,
- a membrane which has a first surface and a second surface which is an opposite surface with respect to the first surface,
- wherein the membrane is arranged with the first surface on top of the first stack and with the second stack arranged on the second surface,
- wherein the membrane is perforated with openings,
- wherein the membrane is formed such that the openings are
- permeable for a fluid flowing along a first direction directed from the first surface to the second surface, and
- impermeable for a fluid flowing along a second direction directed from the second surface to the first surface;
- wherein the membrane comprises an elastic seal lip surrounding one of the openings, wherein the elastic seal lip is pressed together based on a second pressure (Pb) of the fluid applied at the first surface being lower than a first pressure (Pa) of the fluid applied at the second surface such that the opening is impermeable for the fluid flowing along the second direction and wherein the elastic seal lip is elastically deformed and edges of the seal lip are bent away from the opening based on the second pressure (Pb) of the fluid applied at the first surface being greater than the first pressure (Pa) of the fluid applied at the second surface such that the opening is permeable for the fluid flowing along the first direction.
Dependencies are inferred from the claim text.