JPS62180700U

JPS62180700U -

Info

Publication number: JPS62180700U
Application number: JP6819086U
Authority: JP
Priority date: 1986-05-08
Filing date: 1986-05-08
Publication date: 1987-11-16
Also published as: JPH045760Y2

Description

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

第１ａ図は、この考案の実施例を示す要部の縦
断側面図、第１ｂ図は、前図のＹ―Ｙ切断面図、
第１ｃ図は、同じく失速除去ベーンと動翼との相
関々係を示す要部の斜視図、第２図は、防止機構
のないフアンと従来機構をもつフアンの性能曲線
図、第３ａ図は、従来失速防止機構を備えた軸流
フアンの要部の縦断側面図、第３ｂ図は、前図の
Ｘ―Ｘ切断面図、第４図は、失速防止機構を装備
しない軸流フアンおよびこの考案に係る軸流フア
ンの性能曲線図である。１……動翼、３……ケーシング、４……後方キ
ヤビテイ、５……旋回防止ベーン、６……前方キ
ヤビテイ、７……円環、８……循環流路、１１…
…一般フアン性能曲線、１２，１３，１４……従
来機構をもつフアンの性能曲線（低速、中速、高
速）、３１……この考案に係るフアンの性能曲線
。 Fig. 1a is a vertical sectional side view of the main part showing an embodiment of this invention, Fig. 1b is a YY sectional view of the previous figure,
Figure 1c is a perspective view of the main parts showing the relationship between the stall removal vanes and the rotor blades, Figure 2 is a performance curve diagram of a fan without a prevention mechanism and a fan with a conventional mechanism, and Figure 3a is a diagram of the performance curves of a fan without a prevention mechanism and a fan with a conventional mechanism. , FIG. 3b is a cross-sectional view of the main parts of an axial flow fan equipped with a conventional stall prevention mechanism, FIG. FIG. 3 is a performance curve diagram of the axial fan according to the invention. DESCRIPTION OF SYMBOLS 1... Moving blade, 3... Casing, 4... Rear cavity, 5... Rotation prevention vane, 6... Front cavity, 7... Annular ring, 8... Circulation channel, 11...
... Performance curve of a general fan, 12, 13, 14... Performance curve of a fan with a conventional mechanism (low speed, medium speed, high speed), 31... Performance curve of a fan according to this invention.

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

軸流フアンの動翼の外周に覆設したケーシング
の該動翼の先端に対向する部分に動翼の前縁先端
付近から上流側に向けて凹所を成形させて循環流
路を構成させ、該循環流路の内部の最初の動翼先
端部分に最も近い個所に多数の旋回除去ベーンを
周方向に並列させたことを特徴とする軸流フアン
の失速防止機構。 Forming a recess from near the leading edge tip of the rotor blade toward the upstream side in a portion of the casing covered around the outer periphery of the rotor blade of the rotor blade facing the tip of the rotor blade to form a circulation flow path, A stall prevention mechanism for an axial flow fan, characterized in that a large number of swirl removal vanes are arranged in parallel in the circumferential direction at a location closest to the first rotor blade tip inside the circulation flow path.