Fluid flow machine featuring a groove on a running gap of a blade end
US8257022B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 2009 |
| Grant date | Sep 4, 2012 |
| Priority date | — |
| Expiry date | Nov 6, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/321
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fluid-flow machine has at least one row of blades 5 having blade ends moving relative to one of a hub 3 and a casing 1, with a gap 11 positioned therebetween. At least one groove 7 extends essentially in a circumferential direction of the machine is in an area of the gap 11 along at least part of the circumference, with the extension of the groove 7 in the circumferential direction being large as compared to the extension of the groove 7 in the meridional flow direction. A cross-sectional area of the groove 7, in meridional view of the fluid-flow machine, essentially departs from a parallelogrammic shape and, due to its contour, is inclined in an upstream direction. A centroid of the groove cross-sectional area is provided upstream of the center of the groove aperture 12 on the main flow path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.