Composite-material blade, rotary machine, and method for forming composite-material blade
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsMasami Kamiya, Ryoji Okabe
Life of this patent
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Abstract
This composite-material blade formed by using a fiber-reinforced resin containing a resin and reinforcing fibers is provided with: a base material part provided on the inner surface of the composite-material blade; and a first cover part for covering the outer surface of the base material part. The base material part is formed by using a carbon fiber-reinforced resin containing a first resin and carbon fibers. The first cover part is formed from an elastic polymer fiber-reinforced resin containing a second resin and elastic polymer fibers, and has more resistance to impact than the base material part.
Claims12
A composite blade formed by using a fiber reinforced resin containing a resin and reinforcing fibers, the composite blade comprising:
- a preform portion provided on an inner surface of the composite blade;
- and
- a first covering unit that covers an outer surface of the preform portion, wherein
- the preform portion is formed by using a carbon fiber reinforced plastic containing a first resin and carbon fibers, and
- the first covering unit is formed of an elastic polymer fiber reinforced resin containing a second resin and elastic polymer fibers, and has more impact resistance than the preform portion,
- wherein the preform portion has a pressure-side blade surface which is one blade surface in a blade thickness direction, a suction-side blade surface which is the other blade surface in the blade thickness direction, and a neutral portion provided between the pressure-side blade surface and the suction-side blade surface, and
- the neutral portion is formed by using the same material as the first covering unit,
- wherein a direction of elastic polymer fibers on an outermost layer of the first covering unit has an inclination of less than 90 degrees with respect to a direction of carbon fibers on a surface layer of the preform portion.
A composite blade formed by using a fiber reinforced resin containing a resin and reinforcing fibers, the composite blade comprising:
- a preform portion provided on an inner surface of the composite blade;
- and
- a first covering unit that covers an outer surface of the preform portion, wherein
- the preform portion is formed by using a carbon fiber reinforced plastic containing a first resin and carbon fibers,
- the first covering unit is formed of an elastic polymer fiber reinforced resin containing a second resin and elastic polymer fibers, and has more impact resistance than the preform portion,
- the preform portion has a pressure-side blade surface which is one blade surface in a blade thickness direction, a suction-side blade surface which is the other blade surface in the blade thickness direction, and a neutral portion provided between the pressure-side blade surface and the suction-side blade surface,
- the neutral portion is formed by using any one of a material obtained by adding an elastomer to a resin-based material and a foam resin, and
- a direction of elastic polymer fibers on an outermost layer of the first covering unit has an inclination of less than 90 degrees with respect to a direction of fibers on a surface layer of the preform portion.
A composite blade formed by using a fiber reinforced resin containing a resin and reinforcing fibers, the composite blade comprising:
- a preform portion provided on an inner surface of the composite blade;
- and
- a first covering unit that covers an outer surface of the preform portion, wherein
- the preform portion is formed by using a carbon fiber reinforced plastic containing a first resin and carbon fibers,
- the first covering unit is formed of an elastic polymer fiber reinforced resin containing a second resin and elastic polymer fibers, and has more impact resistance than the preform portion,
- the preform portion has a pressure-side blade surface which is one blade surface in a blade thickness direction, a suction-side blade surface which is the other blade surface in the blade thickness direction, and a neutral portion provided between the pressure-side blade surface and the suction-side blade surface,
- the neutral portion is formed of a foaming agent to which an elastic filler is added, and
- a direction of elastic polymer fibers on an outermost layer of the first covering unit has an inclination of less than 90 degrees with respect to a direction of fibers on a surface layer of the preform portion.
Dependencies are inferred from the claim text.