Axial-flow fan
US4630993A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1985 |
| Grant date | Dec 23, 1986 |
| Priority date | — |
| Expiry date | Mar 22, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S415/914
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The rotor (1) of the fan is surrounded by a casing (5) having inlet and outlet sections (6, 8) interconnected by an enlarged intermediate section (7) defined between and end wall (10) located upstream of the rotor and an end wall (11) axially disposed between the leading and trailing blade edges (12, 13). The annular chamber (9) defined within the intermediate section (7) is subdivided into a plurality of compartments (25) by means of guide vanes (14), the innermost edge zones of which are inclined towards the direction of rotation of the rotor and include an angle of 40.degree. to 65.degree. with a radius to the rotor axis (3). The guide vanes (14) are preferably curved such that they meet the peripheral wall (15) of the annular chamber (9) at right angles. Preferably the inner edges of the guide vanes (14) are interconnected by a ring (22) located midway between the upstream and downstream end walls (10, 11) of the annular chamber (9), and the end portions (19) of the innermost vane edges located between the upstream end wall (10) and the ring (22) are preferably outwardly retracted relative to the remainder (18) of each edge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.