JPS62141697U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案の一実施例による軸流送風機
の断面図、第２図はその羽根車の斜視図、第３図
はそのそり線と直交する面の断面図、第４図およ
び第５図は実施例の特性を示す関係曲線図、第６
図は従来の軸流送風機の断面図、第７図はその羽
根車の斜視図、第８図はそのそり線と直交する面
の断面図である。 各図中、同一符号は同一または相当部分を示し
、１は吸込ケーシング、１ａは開口面積縮小部、
２は羽根、２ａは先端部負圧面エツヂ、２ｂは先
端部圧力面エツヂ、２ｃは先端面、２ｆはそり線
、４は羽根車、５は回転軸、βは傾斜角である。 Fig. 1 is a sectional view of an axial blower according to an embodiment of this invention, Fig. 2 is a perspective view of its impeller, Fig. 3 is a sectional view of a plane perpendicular to the warp line, and Figs. The figure is a relationship curve diagram showing the characteristics of the example, No. 6
The figure is a sectional view of a conventional axial flow blower, FIG. 7 is a perspective view of its impeller, and FIG. 8 is a sectional view of a plane orthogonal to the warp line. In each figure, the same symbols indicate the same or equivalent parts, 1 is the suction casing, 1a is the opening area reduction part,
2 is a blade, 2a is a tip suction surface edge, 2b is a tip pressure surface edge, 2c is a tip surface, 2f is a warp line, 4 is an impeller, 5 is a rotation axis, and β is an inclination angle.

Claims (1)

【実用新案登録請求の範囲】 (1) 開口面積が入口側から出口側に向けて徐々
に減少する開口面積縮小部を有する吸込ケーシン
グと、この吸込ケーシング内で回転するように設
置された羽根車と、この羽根車の回転軸側から前
記吸込ケーシングの内周側に伸びかつ翼形の横断
面を有する羽根とを備え、前記羽根の先端に形成
される先端面が負圧面エツヂから圧力面エツヂに
向つて回転軸側に１５°〜７５°の傾斜角で傾斜
したことを特徴とする軸流送風機。 (2) 先端面が曲面または平面であることを特徴
とする実用新案登録請求の範囲第１項記載の軸流
送風機。[Scope of claim for utility model registration] (1) A suction casing having a reduced opening area where the opening area gradually decreases from the inlet side to the outlet side, and an impeller installed to rotate within the suction casing. and a blade extending from the rotating shaft side of the impeller to the inner peripheral side of the suction casing and having an airfoil-shaped cross section, the tip surface formed at the tip of the blade changing from the suction surface edge to the pressure surface edge. An axial flow blower characterized by being inclined at an inclination angle of 15° to 75° toward the rotating shaft side. (2) The axial flow blower according to claim 1 of the utility model registration claim, wherein the tip surface is a curved or flat surface.