Non retractable segmented packing ring for fluid turbines having special springs to reduce forces during shaft rubbing
US6220603A · kind A · utility
Inventors
Key dates
| Filing date | Jul 13, 1998 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Jul 13, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/442
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A segmented seal ring and spring system for very low pressure drop zones in steam turbines for minimizing leakage between rotating and stationary components, and preventing damage and wear thereto, including a segmented seal ring, with first springs biased against the seal segments to urge the segments radially inwardly toward a small clearance position of the seal ring with respect to the turbine shaft secondary springs to counter the weight of the segments; with the combination of said springs gently urging the seal segments into the small clearance position while allowing clearance enlargement with small resulting forces on the shaft during periods of misalignment and rubbing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.