DIAMETRAL FAN Russian patent published in 2013 - IPC F04D17/04 

FIELD: ventilation.

SUBSTANCE: invention is designed for systems of ventilation, heating, in different pneumatic systems (for instance, winnowing machines). A fan comprises a spiral body with an entrance window (EW) and an adjacent injection nozzle (IN), having outer and inner walls (OW and IW), a blade impeller (BI). The IN has a wall adjacent to the EW. The IN in the vertical plane is turned by 90° and in the horizontal plane (in direction of air movement) is made as expanding. In the PI there are vertically installed curvilinear guide blades (CGB, GB), at the same time GB, IW and OW of the IN in the horizontal plane in direction of air flow movement produce curvilinear confuser channels. The inner edges (IE) of the CGB are adjoined to the BI and are arranged as IE of the OW and IW of the IN, in vertical planes perpendicular to the axis of the BI rotation, and are directed towards the output section (OS) of the IN. GB have different length, at the same time a GB adjoining the IN OW has highest length, and the length of subsequent GB is gradually reducing. The output edges (OE) of the GB and OW and IW of the IN are arranged in the vertical plane stretching via the output section of the IN, and at the identical distance from each other and from OE and OW, at the same time the tangent plane drawn via the marked OE is parallel to the BI rotation axis.

EFFECT: design makes it possible to reduce metal intensity and preserve flat parallelism of air flow.

4 cl, 2 dwg