Axial fan turning diffuser
US4318693A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 1980 |
| Grant date | Mar 9, 1982 |
| Priority date | — |
| Expiry date | Nov 20, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27B2005/167
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The axial fluid flow fan comprises a shaft, an impeller mounted on said shaft comprising a tankhead and a plurality of blades, a drive means attached to the shaft for rotating the impeller and a deflector having a bugle bell shape defined by a small diameter, a large diameter and a radius of curvature joining the diameters. The deflector is positioned downstream of the fan and slightly spaced from the impeller to separate the fluid coming off the impeller into at least two annular flow areas. The fan is part of a plug unit for a heat treating furnace in which the deflector is positioned about a frustoconical shaped shield which protects the shaft. The flow area downstream of the impeller is divided into equal areas. An extension plate in the furnace cooperates with the deflector to maintain the split areas of flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.