SU819408A2 - Centrifugal fan - Google Patents

Description

one

This invention relates to a fan construction and can be used in combine harvesters.

According to the main auth. 616430 is well known; a centrifugal fan 1 comprising a casing with openings on a lateral cylindrical surface and suction and discharge nozzles and an impeller mounted in the casing made in two sections, with a partition in the form of two disks with windows 1 located between the sections.

However, this fan does not provide an even distribution of air flow rates over the discharge section.

The purpose of the invention is to reduce the irregularity of the flow rates of air over the cross section of the discharge pipe.

This goal is achieved by the fact that the top and bottom walls of the discharge pipe in the area between the sections of the impeller have windows, between the latter are set up isolating from the flow coming out of the impeller, U-shaped fitting, End of the ends

This spacers are widened, with baffles located perpendicular to the axis of the impeller on both sides of the center.

Figure 1 shows the proposed fan, a cross-section; in fig. 2 - the same longitudinal section,

The centrifugal fan contains a casing 1 with holes 2 on the side

the cylindrical surface 3 and the suction 4 and the Injection 5 nozzles; an impeller 6 mounted in the housing; made in two sections. At the same time, between sections.

7 and 8, there is a partition in the form of two disks 9 with windows 10. The upper 11 and lower 12 walls of the discharge nozzle 5 in the area between the sections of the impeller have windows 13. Between

the latter are installed isolating them from the flow coming from the impeller 6, U-shaped spacer 14, the output sections 15 of the ends of which are made expanding. With two

The sides of the spacer 14 are perpendicular to the axis a-a of the impeller 6, and partition walls 16 are located.

As the impeller rotates, air flow is drawn into the casing.

1 and is thrown into the injection

Claims (1)

Claim Centrifugal fan "616430, characterized in that, in order to reduce the unevenness of the air flow velocity over the cross-section of the discharge pipe, the upper and lower walls of the discharge pipe in the aeon between the sections of the impeller have windows, between the latter there is installed isolating them from the flow exiting the impeller, П -shaped spacer, the outlet sections of the ends of this spacer are made expandable, with partitions located on two sides of the spacer perpendicular to the axis of the impeller.