JPS63128298U

JPS63128298U -

Info

Publication number: JPS63128298U
Application number: JP16167187U
Authority: JP
Priority date: 1987-10-22
Filing date: 1987-10-22
Publication date: 1988-08-22

Description

[Brief explanation of the drawing]

第１図、第２図、第３図はそれぞれ公知の軸流
型、斜流型、遠心型送風機、圧縮機の部分縦断側
面図、第４図、第５図、第６図はそれぞれ第１図
、第２図、第３図の子午面上の流れ、回転軸を中
心とする円筒面（以下回転流面）上の流れであつ
て流量が適当である場合、回転流面上の流れであ
つて流量が減少した場合の流れ速度三角形図、第
７図は本考案を遠心送風機に適用した一実施例を
示す部分縦断側面図、第８図および第９図はそれ
ぞれ第７図において流量が適当な場合の羽根車入
口の子午面内の流れおよび回転流面内の流れ図、
第１０図および第１１図はそれぞれ第７図におい
て流量が少ない場合の羽根車入口の子午面内の流
れおよび回転流面内の流れ図、第１２図は第１１
図における翼間の拡大図、第１３図、第１４図は
それぞれ第１２図の点ｐ１，ｐ２における速度三
角形図、第１５図は第７図の部分拡大図、第１６
〜１７図はそれぞれ第７図とは異なる環状凹溝を
示す部分縦断面図である。１……羽根車、２……翼、３……回転軸、５…
…ケーシング、６……翼前縁、７……羽根車入口
、８……主流、９……腹面、１０……背面、１１
……周速度ベクトル、１２……子午面速度ベクト
ル、１３……相対速度ベクトル、１４ａ，１５ａ
，１４ｂ，１５ｂ……流れ速度ベクトル、１６…
…剥離、１７……環状凹稿、１８……渦。 Figures 1, 2, and 3 are partial vertical sectional side views of known axial flow type, mixed flow type, centrifugal type blower, and compressor, respectively, and Figures 4, 5, and 6 are respectively 1 The flow on the meridian plane shown in Figures 2 and 3, the flow on a cylindrical surface centered around the axis of rotation (hereinafter referred to as the rotating flow surface), and when the flow rate is appropriate, the flow on the rotating flow surface Fig. 7 is a partial vertical cross-sectional side view showing an embodiment of the present invention applied to a centrifugal blower, and Figs. 8 and 9 are flow velocity triangle diagrams when the flow rate decreases in Fig. 7. Flow diagrams in the meridional plane and in the rotational plane of the impeller inlet when appropriate,
Figures 10 and 11 are the flow diagrams in the meridian plane and rotational flow plane at the impeller inlet when the flow rate is small in Figure 7, respectively, and Figure 12 is the flow diagram in the rotating flow plane.
13 and 14 are velocity triangle diagrams at points p1 and p2 in FIG. 12, respectively. FIG. 15 is a partial enlarged view of FIG. 7, and FIG.
17 are partial longitudinal sectional views showing annular grooves different from those in FIG. 7. FIG. 1... Impeller, 2... Wings, 3... Rotating shaft, 5...
...Casing, 6... Blade leading edge, 7... Impeller inlet, 8... Main stream, 9... Ventral surface, 10... Rear surface, 11
... Circumferential velocity vector, 12... Meridional velocity vector, 13... Relative velocity vector, 14a, 15a
, 14b, 15b...flow velocity vector, 16...
...Peeling, 17...Annular concave draft, 18...Vortex.

Claims

[Scope of utility model registration request]

In a blower compressor, the blower compressor is provided with a single wide annular groove recessed across the leading edge of the impeller blade in a portion of the casing at the impeller inlet facing the leading edge of the impeller blade; A blower or a compressor comprising an annular protrusion with an acute angle and/or an annular protrusion with an end facing downstream and an acute angle protrusion provided at an end and/or a downstream end, and/or an annular protrusion with an acute angle facing upstream.