JPS59192898A - Centrifugal impeller - Google Patents

Abstract

PURPOSE:To permit to make the angle of deflection large without changing the angle of exit port by a method wherein the configuration of a blade is made into a S-shaped configuration in the centrifugal impeller utilized for centrifugal type fluid machine. CONSTITUTION:The configuration of the blade 1 in a front view as seen from an inlet port side is formed into the S-shaped configuration consisting of a forward blade part 1c, curved into the rotating direction A as it goes from the inside to the outside, and backward blade part 10, curved toward the backward direction of the rotation. According to this method, the angle of recurvature theta may be made larger without changing the exit port angle beta, a quick flow speed area (c) positioned at the rearward side of the rotation in the forward blade part 1c may be returned to the central side of the flow path and the flow speed distribution may be uniformed at the exit port of the impeller.

Description

[Detailed Description of the Invention] The present invention provides a blower/D bonder, a centrifugal blower, a distant compressor,
The present invention relates to a cylindrical impeller used in a cylindrical fluid machine such as a supercharger or a supercharger.

FIG. 1 shows a conventional backward type mesial impeller. In other words, when viewed from the front from the entrance side 1, the blades (
In the shape of 1), from the inside to the outside, 1111M row <'Jc, first, the linear radial blade part CI extends in the linear radial direction 1c.
A) and a backward blade 'J (IB) that curves 1i111 backwards by one rotation. where (r,)
is the inlet diameter, (r2) is the radius of the dispensing part, (r3) is the exit radius, (bending angle, (β) is the exit angle, and (A) is the rotation direction. The backward type centrifugal impeller of
impeller.

or backward type it > impeller), due to the bending influence of the flow path by the /cookward blade part (IB) K, the rotation backward in the straight radiating blade part (tA) shown in Fig. 1 (a). The area with high flow velocity located on the side is shown in Figure 1 (b).
As shown in , there is an effect ball that returns to the center of the flow path to bring the flow velocity distribution at the impeller outlet closer to uniformity. Such homogenization can result in higher fluid dynamics of fluid machinery than H < 6.
IE) The self-reliance of the flow path; the magnitude of the turning angle θ
), there is a limit to the setting because there is a constraint on the exit angle β.
There was a limit to making the flow velocity distribution more uniform.

An object of the present invention is to provide a centrifugal impeller that can have a larger turning angle than conventional impellers.

In order to achieve the above object, the impeller of the present invention has a blade shape in the front view from the inlet side.As going from the inside to the outside 1, the impeller first curves in the rotation direction IVc, and then curves backward in the rotation direction. In order to curve 11v, an S-shape 1c is formed and constructed.

According to such a four-structure iC, by forming the blade shape into an S-shape, the turning angle can be increased without changing the starting point.

A first embodiment of the present invention will now be described with reference to FIG. 1111 i4 - The shape of the blade (1) in the front knee viewed from the inlet side is changed from the inner side 1 to the outer side 4 (as it goes, first the rotation direction (A) 1111 i4-curved forward blade part (Ic ) and the backward blade portion (ID) curved toward the rear side of rotation, forming an upward S-shape. According to this embodiment Q, the turning angle (θ) can be adjusted without changing the exit angle (β). ) can be increased, and therefore the entire flow velocity region located at the rear of rotation 11111 in the forward vane (Ic) shown by → in Figure 2, the central ml IC of the flow path as shown by ) in Figure 2, In other words, conventionally (
Figure 1) Compared to VC, roughly move it back to the center of the flow path.

The flow velocity distribution at the impeller outlet can be made more uniform.

3 and 4 show @2 embodiment of the present invention.

In other words, the inlet side of the blade (1) is the inducer part (IE).
is formed. Fast IL according to this arrow example:? The impeller can be used in a wide range of V-type applications for retracting pumps, centrifugal blowers, far-b compressors, turbochargers, and superchargers.

According to the present invention ν with the above configuration, the speeding blade army ζ is
By forming the blade shape into an S-shape, the turning angle can be increased without changing the exit angle, and the bending effect of the flow path can be increased, and various regions of flow velocity can be improved. The flow velocity distribution can be made uniform by returning the flow to the center 1Illj of the flow path.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view showing the entire conventional example, Fig. 2 is a schematic front view showing the first embodiment of the present invention, Figs. 3 and 4 show the second embodiment of the invention, and Fig. 3 is a schematic front view showing the entire conventional example. is a schematic front view, and FIG. 4 is a schematic longitudinal sectional side view. (1)...Blade + (tC)...Forward blade part, (ID)...Backward blade part, (IE)...
・Inducer part, (rl)...Inlet radius, (r,)
... Turning part radius, (r3) ... Exit radius, (θ)
... Turning angle, (β) ... Exit angle, (A) ... Rotating direction, (c) (Gradient ... Flow velocity distribution procedure amendment form (Ceramics 6) 1. Indication of the incident Showa 58 I1 γ1 Application No. 67430
'52 Name of the invention Relationship with the person making the third amendment to the centrifugal vane Patent applicant Name: Fuyu (511) Hitachi Zosen Co., Ltd. Hitachi Zosen Co., Ltd., 4th generation director Personal address: Amano Building, 1-6-171 Tateuribori, Nishi-ku, Osaka 550 Telephone: Inusaka 06 (532) No. 4025 (Main) Name (6808) Patent Attorney Yoshihiro Morimoto 5
Date (shipment date) Showa year month
Day 6 Number of inventions increased by amendment 7 Target of amendment 1 Issue of specification 1 Detailed explanation column (1) 2nd page, 3rd line, ``Bank word type'' expression” and 1;]
Correct. (2) Page 4, line 3] - Correct 1, 59F, which says "Cure" as "1 life river"

Claims (1)

[Claims] 1 The feather-shaped autumnal equinox seen from the front view KD from the population 1 rule, as you go from the inside to the outside 1111, first the rotation direction 1111
The U impeller is unique in that it is formed into an S-shape so that it curves in the direction of 1 and then curves toward the rear of rotation.