IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0883827
(1997-06-27)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- Siemens Canada Limited, CAX
|
인용정보 |
피인용 횟수 :
14 인용 특허 :
10 |
초록
▼
A high efficiency, low solidity, low weight, axial flow fan (100, 200, 300) includes a hub (102, 202, 302), fan blades (104, 204, 304) and a circular band (106, 206, 306). The hub (102, 202, 302) rotates about a rotational axis (110, 210, 310) when torque is applied from a shaft (not shown) rotatabl
A high efficiency, low solidity, low weight, axial flow fan (100, 200, 300) includes a hub (102, 202, 302), fan blades (104, 204, 304) and a circular band (106, 206, 306). The hub (102, 202, 302) rotates about a rotational axis (110, 210, 310) when torque is applied from a shaft (not shown) rotatably driven by a power source (not shown). The circular band (106, 206, 306) is concentric with the hub (102, 202, 302) and is spaced radially outward from the hub. The blades (104, 204, 304) are distributed circumferentially around the hub (102, 202, 302) and extend radially from the hub to the circular band (106, 206, 306). The blades (104, 204, 304) are configured to produce an airflow when rotated about the rotational axis (110, 210, 310). Each blade (104, 204, 304) has a chord length distribution which varies along the length of the blade, such that the chord length has a local minimum value at a predetermined location between the ends of the blade. The chord length of the blades (104, 204, 304) as a function of blade radius from the rotational axis (110, 210, 310) has an inflection point at a predetermined distance from the hub less than the length of the blade.
대표청구항
▼
[ What is claimed is:] [21.] A high efficiency, low solidity, low weight, axial flow fan for producing an airflow through an engine compartment of a vehicle comprising:a hub rotatable about a rotational axis;a circular band concentric with the hub and spaced radially outward from the hub; andfour fa
[ What is claimed is:] [21.] A high efficiency, low solidity, low weight, axial flow fan for producing an airflow through an engine compartment of a vehicle comprising:a hub rotatable about a rotational axis;a circular band concentric with the hub and spaced radially outward from the hub; andfour fan blades distributed circumferentially around the hub and extending radially from the hub to the circular band, wherein each blade has substantially the parameters defined by______________________________________ R C .epsilon. .THETA. (mm) R/R.sub.tip (mm) (deg) (deg) .sigma. ______________________________________ 75.00 0.40 56.00 67.63 19.00 0.48 86.19 0.46 70.11 67.00 20.00 0.52 99.80 0.53 76.16 66.73 24.00 0.49 113.56 0.60 74.00 67.00 23.00 0.41 127.25 0.67 66.76 67.80 22.30 0.33 140.94 0.75 57.58 69.00 22.00 0.26 157.00 0.83 49.61 71.00 21.00 0.20 168.31 0.89 46.00 73.00 21.00 0.17 182.82 0.97 49.87 76.39 21.50 0.17 188.84 1.00 55.59 78.00 23.00 0.19 196.10 1.04 65.00 80.00 24.00 0.21 ______________________________________ reinR is the radial distance from the rotational axis,R/R .sub.tip is the dimensionless radial distance based on blade tip section radii,C is the chord length of the blade at the radial distance R,.epsilon. is the stagger angle of the blade at the radial distance R,.theta. is the camber angle of the blade at the radial distance R, and.sigma. is the solidity C/S, S being the circumferential blade spacing, at the radial distance R.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.