JPH0237297U

JPH0237297U -

Info

Publication number: JPH0237297U
Application number: JP1988115400U
Authority: JP
Priority date: 1988-09-01
Filing date: 1988-09-01
Publication date: 1990-03-12

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示し、羽根車の羽
根出口部を主に示した軸正面側から見た図、第２
図以下は従来の構造を示し、第２図は遠心圧縮機
の軸線を含む平面での縦断面図、第３図は主羽根
と中間羽根を有する羽根車の軸正面側から見た斜
視図、第４図は羽根車入口の円筒面展開図、第５
図は羽根車出口における速度線図、第６図はシユ
ラウド線に沿つての子午面長さと羽根角度の関係
を示す特性図である。１……羽根車、１１……主羽根、１２……前段
中間羽根、１３……後段中間羽根、２……デイフ
ユーザ、２１……デイフユーザ羽根、３……スク
ロール、４……軸、β_１Ｋ……羽根入口角、β_２Ｋ……羽根出口角、β_２……相対速度の流出角、
Ｗ_２……相対流出速度、Ｃ_２……絶対流出速度、
Ｕ_２……羽根車出口の周速度、Ｓ_ｔ……喉巾、ｍ
……子午面長さ、ｔ_２……出口羽根厚。 Fig. 1 shows an embodiment of the present invention, which is a view seen from the front side of the shaft mainly showing the blade outlet section of the impeller;
The following figures show the conventional structure: Fig. 2 is a longitudinal sectional view on a plane including the axis of the centrifugal compressor, Fig. 3 is a perspective view of an impeller having main blades and intermediate blades as seen from the front side of the shaft; Figure 4 is a developed view of the cylindrical surface of the impeller inlet, Figure 5
The figure is a velocity diagram at the impeller outlet, and FIG. 6 is a characteristic diagram showing the relationship between the meridional plane length and the blade angle along the shroud line. 1... Impeller, 11... Main blade, 12... Front intermediate blade, 13... Rear intermediate blade, 2... Differential user, 21... Differential user blade, 3... Scroll, 4... Shaft, β ₁ K ...Blade inlet angle, β ₂ K...Blade exit angle, _β2 ...Outflow angle of relative velocity,
W ₂ ... Relative outflow velocity, C ₂ ... Absolute outflow velocity,
U ₂ ... Circumferential speed at impeller outlet, S _t ... Throat width, m
... Meridian length, t ₂ ... Outlet blade thickness.

Claims

[Scope of utility model registration request]

In a centrifugal compressor impeller equipped with a main blade, a front intermediate blade, and a rear intermediate blade, the impeller outlet section is formed only by the rear intermediate blade, and the outlet side ends of the main blade and the front intermediate blade are removed. Features a centrifugal compressor impeller.