PROPELLER FAN, MOLDING DIE, AND FLUID FEED DEVICE
PROBLEM TO BE SOLVED: To provide a propeller fan, a molding die, and a fluid feed device for significantly contributing to energy conservation and resource saving designing. SOLUTION: A two-blade propeller fan includes a blade 21A, a blade 21B, and a connecting part 31 that connects the blades to ea...
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| creator | TAKEDA YASUKATA |
| description | PROBLEM TO BE SOLVED: To provide a propeller fan, a molding die, and a fluid feed device for significantly contributing to energy conservation and resource saving designing. SOLUTION: A two-blade propeller fan includes a blade 21A, a blade 21B, and a connecting part 31 that connects the blades to each other. Each of the blades includes: a peripheral edge part 21a having a diameter D about a central axis 101 and extending in an arc shape; a leading edge part 21b disposed on a side in the rotational direction; a trailing edge part 21c disposed on the other side in the rotational direction; and a blade tip edge part 21d connecting the leading edge part 21b and the peripheral edge part 21a. A plane which contains an intersection point 21e of the trailing edge part 21c and the peripheral edge part 21a and perpendicular to the central axis 101 is denoted a plane γ. If the propeller fan is viewed from a direction parallel to a plane containing the blade tip edge part 21d and the central axis 101, a distance H, on a line including the central axis 101, between the plane γ and a connecting part of the leading edge part 21b of the blade 21A and the trailing edge part 21c of the blade 21B satisfies a relation of 0.028≤H/D≤0.056. COPYRIGHT: (C)2011,JPO&INPIT |
| format | Patent |
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SOLUTION: A two-blade propeller fan includes a blade 21A, a blade 21B, and a connecting part 31 that connects the blades to each other. Each of the blades includes: a peripheral edge part 21a having a diameter D about a central axis 101 and extending in an arc shape; a leading edge part 21b disposed on a side in the rotational direction; a trailing edge part 21c disposed on the other side in the rotational direction; and a blade tip edge part 21d connecting the leading edge part 21b and the peripheral edge part 21a. A plane which contains an intersection point 21e of the trailing edge part 21c and the peripheral edge part 21a and perpendicular to the central axis 101 is denoted a plane γ. If the propeller fan is viewed from a direction parallel to a plane containing the blade tip edge part 21d and the central axis 101, a distance H, on a line including the central axis 101, between the plane γ and a connecting part of the leading edge part 21b of the blade 21A and the trailing edge part 21c of the blade 21B satisfies a relation of 0.028≤H/D≤0.056. 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If the propeller fan is viewed from a direction parallel to a plane containing the blade tip edge part 21d and the central axis 101, a distance H, on a line including the central axis 101, between the plane γ and a connecting part of the leading edge part 21b of the blade 21A and the trailing edge part 21c of the blade 21B satisfies a relation of 0.028≤H/D≤0.056. 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SOLUTION: A two-blade propeller fan includes a blade 21A, a blade 21B, and a connecting part 31 that connects the blades to each other. Each of the blades includes: a peripheral edge part 21a having a diameter D about a central axis 101 and extending in an arc shape; a leading edge part 21b disposed on a side in the rotational direction; a trailing edge part 21c disposed on the other side in the rotational direction; and a blade tip edge part 21d connecting the leading edge part 21b and the peripheral edge part 21a. A plane which contains an intersection point 21e of the trailing edge part 21c and the peripheral edge part 21a and perpendicular to the central axis 101 is denoted a plane γ. If the propeller fan is viewed from a direction parallel to a plane containing the blade tip edge part 21d and the central axis 101, a distance H, on a line including the central axis 101, between the plane γ and a connecting part of the leading edge part 21b of the blade 21A and the trailing edge part 21c of the blade 21B satisfies a relation of 0.028≤H/D≤0.056. COPYRIGHT: (C)2011,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng |
| recordid | cdi_epo_espacenet_JP2011058449A |
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| subjects | BLASTING HEATING LIGHTING MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT PUMPS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS WEAPONS |
| title | PROPELLER FAN, MOLDING DIE, AND FLUID FEED DEVICE |
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