COOLING TOWER FAN Russian patent published in 2009 - IPC F28C1/00 

FIELD: heating.

SUBSTANCE: invention deals with design of contact cooler components (such as cooler tower ventilators) and may be of relevance in view of providing for the recooling needs of enterprises working in such spheres as chemical industry and power engineering. The cooler tower ventilator contains a diffuser whose casing is represented by a confuser-diffuser barrel fabricated of a glass material. On the casing outside there are intercrossing reinforcement ribs arranged. The diffuser contains a vaned wheel whose shaft is connected to the vaned wheel rotation drive. The intercrossing reinforcement ribs are hollow inside and have trapezoidal cross-section; they are positioned horizontally and vertically so that to form a meshed structure with some of the vertically positioned reinforcement ribs conjugated with the slanting ribs positioned at an angle with them. The confuser-diffuser barrel is represented by a rotary body. The barrel confuser part is formed by a tapered surface faired with a cylindrical surface. The barrel diffuser part is formed by a tapered surface faired with the confuser part cylindrical surface. Height of the tapered surface of the barrel confuser part is equal to 0.7-0.8 of that of the barrel diffuser casing. Height of the cylindrical surface is equal to 0.3-0.4 of that of the barrel confuser part. The generatrix of the confuser part tapered surface is faired with the cylindrical surface generatrix via a circular arc whose radius R₁ is equal to 0.2-0.4 of the diffuser casing height. The generatrix of the diffuser part tapered surface is faired with the cylindrical surface generatrix via a circular arc whose radius R₂ is equal to 0.3-0.4 of the diffuser casing height. Angle α of the confuser part tapered surface generatrix slant relative to the barrel vertical axis varies from 25° to 35°. Angle β of the diffuser part tapered surface generatrix slant relative to the barrel vertical axis varies from 10° to 20°.

EFFECT: reduction of aerodynamic resistance in the flow section of the cooling tower ventilator diffuser combined with the structure rigidity enhancement.

2 dwg