摘要:
A propeller blade (100) includes a foam core (205) and a structural layer formed of multiple layers (206a, 206b) that surrounds at least a portion of the foam core (205). The structural layer includes a mid-thickness location defined between the foam core and an outer edge of the structural layer and the multiple layers (206a, 206b) include at least one unidirectional layer (206b) and at least one biased layer (206b) disposed asymmetrically about the mid-thickness location.
摘要:
A rotor hub assembly (103, 203, 301) and method for controlling movement of a rotor blade (107, 303) relative to a swashplate (305). The hub assembly having an attachment device (315) operably associated with the rotor blade and the swashplate. The attachment device provides pivot and rotational blade movement relative to the swashplate. A dual spring-rate damper (321, 323) is operably associated with the attachment device. The damper (321, 323) switches between a first spring rate and a second spring rate during flight to control movement of the rotor blade. The method includes the process of switching the damper between the first spring rate and the second spring rate during flight.
摘要:
One embodiment of the present invention is a main rotor helicopter blade for generating higher lift with less drag and delaying stall at high Mach numbers. A cross-section of this blade includes aft camber. The difference between a chord line of the cross-section and a camber line of the cross-section increases from a leading edge of the cross-section to a maximum between a trailing edge of the cross-section and a midpoint of the chord line and decreases to the trailing edge producing the aft camber of the blade. The aft camber generates higher lift with less drag and delays stall at high Mach numbers.
摘要:
The invention is related to a machine having a stator (435) including a member consisting of: (a) electrically conductive wire windings (439), or (b) a magnet (16); and a rotor (15; 413) comprising vanes including stacked layers of at least one elongated fiber (12), the rotor including a member consisting of: (a) electrically conductive wire windings (439), or (b) a magnet (16); the rotor operably rotating adjacent the stator and electromagnetism passing between the rotor and the stator during the rotation. The invention is also related to a method of making a machine.
摘要:
The invention is related to a turbomachine having a first impeller (403) and at least a second impeller (405) rotating about a common axis, each of the impellers comprising multiple blades including at least one continuous fiber having a stacked arrangement on the blades. The invention is also related to a method for using rotors, the method comprising: rotating a first woven rotor (403) about an axis (419), the first woven rotor including multiple vanes made from an elongated fiber ; and rotating at least a second woven rotor (405) about the same axis, the second woven rotor including multiple vanes made from another elongated fiber.
摘要:
The present invention relates to a transport system for transporting at least one blade or spar for a wind turbine. The blade or spar has a root end and a tip end. The transport system comprises a root frame structure for holding the root end and a fixation device adapted to fixate and support the blade or spar between the root end and tip end.
摘要:
A system for manufacturing a blade (200) is provided. The system includes a mold (304), a plurality of first plies, each of the first plies sized to extend substantially the length of a span of the blade, a plurality of second plies, each of the second plies sized to extend only partially the length of the span of the blade, the plurality of first plies layered with the plurality of second plies in the mold such that the plurality of second plies is interspersed throughout the plurality of first plies to spread apart the plurality of first plies to facilitate increasing a cross-sectional area of the blade.
摘要:
An airfoil family for a helicopter rotor blade, designated SC362XX. SC362XX essentially removes the large lower surface suction peak associated with 'drag creep' at moderate lift coefficients while reducing the peak Mach number and shock strength at high lift/Mach number conditions. Another optional airfoil family for use at inboard regions of the helicopter rotor, which is designated SC3252XX airfoil family, is a relatively thicker airfoil section that includes a significant increase in thickness forward of the 30% x/c location to provide a relatively thick and rigid inboard section. The lift coefficient at which the drag divergence Mach number was optimized is the same in both families thereby readily providing application to a single rotor blade.