Use of spray coatings to achieve non-uniform seal clearances in turbomachinery
US7255929B2 · kind B2 · utility
8Cited by
17References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2003 |
| Grant date | Aug 14, 2007 |
| Priority date | — |
| Expiry date | Feb 3, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/26
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention provides spray coatings to achieve circumferentially non-uniform seal clearances in turbomachines. In steam and gas turbines it is desirable to assemble the machines with elliptical seal clearances to compensate for expected casing distortion, rotordynamics or phenomena that cause circumferentially non-uniform rotor-stator rubs. The claimed invention allows the casing hardware to be fabricated round, and a spray coating is applied to the radially inner surface such that the coating thickness varies circumferentially, providing the desired non-uniform rotor-stator clearance during assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.