SU1321936A1 - Fan impeller - Google Patents

Abstract

The invention relates to ventilator construction and allows an increase in productivity and an increase in the uniformity of flow at the outlet of the impeller of the fan. Conical discs 6 and 7 are mounted in the hub 1, which divide the centrifugal channels into peripheral, middle and inner sections 8, 9 and 10, respectively. In section 8, backward curved blades 11 are located, in section 9, radial blades 12, and in section 10, forward curved blades 13. Channels 2, 3, and 4 exit are located on the other end of the hub 1. The pressure coefficients of each type of blade are chosen with this It is calculated that the head pressure in the axial and centrifugal channels is (Equal, which makes it possible to obtain an equal number flow at the exit from the impeller of the fan. 2 ill. (L S oo with O5 O5).

Description

This invention relates to a fan-controlled construction and concerns an impeller of a fan.

The aim of the invention is to increase productivity and improve the uniformity of flow at the outlet of the fan impeller.

FIG. 1 schematically shows the fan impeller of FIG. 2, section A-A in FIG. one.

The fan impeller contains a hub 1 with centrifugal channels 2-4, the inlet of which is located on the side of one of its ends (shown by an arrow in Fig. 1). Axial working blades 5 are mounted on the hub. Two conical disks 6 and 7, installed in hub 1, divide centrifugal channels 2-4 into peripheral 8, middle 9 and inner 10 sections, in which, respectively, 11 are bent back, radial 12 and forward curved 13 shoulder blades. The output of the centrifugal channels 2-4 and axial blades 5 is located on the side of the other end of the hub 1.

When the fan is working, the air flow approaching the impeller from one of its ends (the direction of rotation of the wheel and the air flow is indicated by arrows})

five

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five

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in centrifugal channels 2-4 and channels formed by axial blades 5. When the impeller rotates, the axial vanes 5 and vanes 11-13, interacting with air, tell him the energy. The pressure factors of each type of blades depend on their outer diameter and are chosen so that the pressure generated in the axial and centrifugal channels is the same, which allows to obtain a uniform flow at the outlet of the fan impeller.

I.

Claims (1)

Invention Formula The fan impeller containing a hub with centrifugal channels, the entrance of which is located on the side of one of its ends, and axial vanes mounted on the hub, characterized in that, in order to increase productivity and increase flow uniformity at the exit of the impeller, it additionally contains two conical discs separating the centrifugal channels into the peripheral, middle, and internal sections and located in them, respectively, backward curved, radial and forward curved blades, and the outlet of the channels dix from the other end of the hub. Editor I.Nikolaychuk Compiled by V.Zad bin Tehred L. Serdyukova Order 2739/28 Circulation .574Subscription VNIIPI USSR State Committee for Inventions and Discoveries 4/5, Moscow, Zh-35, Raushsk nab. 113035 Production and printing company, Uzhgorod, st. Design, .4 FIG. I Proofreader N.Korol