当前申请(专利权)人：
MITSUBISHI HEAVY INDUSTRIES, LTD.
原始申请(专利权)人：
MITSUBISHI HEAVY INDUSTRIES, LTD.
当前申请(专利权)人地址：
2-3, Marunouchi 3-chome, Chiyoda-ku, Tokyo 100-8332, Japan
摘要：
This composite material blade, which is formed using a composite material including reinforcing fibers and resin, and which has a positive pressure surface and a negative pressure surface, is provided with a ventral part, being the part on the positive pressure surface side in a blade thickness direction, which is the direction joining the positive pressure surface and the negative pressure surface, a dorsal part, being the part on the negative pressure surface side in the blade thickness direction, and a metal shield portion which is provided on the leading edge side, being the upstream side in a flow direction in which a fluid flows, wherein: the metal shield portion includes a main body portion provided on the leading edge side, and an embedded portion which is provided on the trailing edge side, being the downstream side in the flow direction, of the main body portion, and which is provided between the ventral part and the dorsal part; and the plate thickness of the metal shield portion in the blade thickness direction decreases from the main body portion toward the embedded portion.
权利要求：
Claims
[Claim 1]
A composite blade which is formed by using a composite material containing reinforcing fibers and a resin, and has a positive pressure surface and a negative pressure surface, the composite blade comprising:
a pressure-side part which is a part on a positive pressure surface side in a blade thickness direction, which is a direction joining the positive pressure surface and the negative pressure surface;
a suction-side part which is a part on a negative pressure surface side in the blade thickness direction; and
a metal shield portion provided on a leading edge side which 1s an upstream side in a circulation direction in which a fluid circulates, wherein
the metal shield portion includes a main body portion provided on the leading edge side, and an embedded portion provided on a trailing edge side which is a downstream side of the main body portion in the circulation direction and provided between the pressure- side part and the suction-side part, and
a plate thickness of the metal shield portion in the blade thickness direction decreases from the main body
portion toward the embedded portion.
[Claim 2]
The composite blade according to claim 1, wherein
in the main body portion, a length from an end portion on the leading edge side to the trailing edge side through the positive pressure surface is longer than a length from the end portion on the leading edge side to the trailing edge side through the negative pressure surface.
[Claim 3]
The composite blade according to claim or 2, wherein
the metal shield portion further includes a retaining unit provided in the embedded portion and protruding from the embedded portion in the blade thickness direction.
[Claim 4]
The composite blade according to any one of claims to 3, wherein
the main body portion has an outer surface part which is an outer surface side and an inner part which is a part on an inner side of the outer surface part, and
in the metal shield portion, at least the outer surface part has a solid structure and at least the embedded portion has a lattice structure.
[Claim B]
The composite blade according to claim 4, wherein
the lattice structure is impregnated with the resin at a joint interface with the pressure-side part and the joint interface with the suction-side part.
[Claim 6]
The composite blade according to claim 4 or 5, further comprising:
a foaming agent that fills an inside of the lattice structure.
[Claim 7]
The composite blade according to any one of claims 4 to 6, wherein
the lattice structure is provided with protrusion portions at a part which is in contact with the pressure- side part and a part which is in contact with the suction- side part.
[Claim 8]
A rotary machine wherein
a plurality of composite blades according to any one of claims to 7 are arranged along a circumferential direction.
[Claim 9]
A method for molding a composite blade, which is for molding the composite blade according to any one of claims to 7, wherein
the pressure-side part and the suction-side part are molded by laminating reinforcing fiber sheets, and
the method comprises:
a step of laminating the reinforcing fiber sheets on a suction-side molding tool for molding the suction-side part to form the suction-side part;
a step of laminating the reinforcing fiber sheets on a pressure-side molding tool for molding the pressure-side part to form the pressure-side part;
a step of arranging the main body portion of the metal shield portion on the leading edge side, arranging the embedded portion between the pressure-side part and the suction-side part, and superimposing the suction-side part and the pressure-side part; and
a step of joining the metal shield portion, the suction-side part, and the pressure-side part.