Bi-directional sealed nozzle dam
US4860919A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1988 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Jul 29, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF22B37/222
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A nuclear steam supply steam generator primary nozzle 16 is sealed by a nozzle dam having segmented bulkhead portions 42 and 45 with peripheral flanges 46,50,52. A rubber diaphragm with a body 54 and peripheral strata form oppositely opening cavities 56 and 58. Hydraulic pressure from either side enters one of the cavities to create a radial sealing force against the inside surface of nozzle 16. A closed cell foam rubber sealing material 76 of 20 to 30 durometer can be interposed between the cavity defining strata and the surface 16 to improve sealing. A hinged retaining ring 70 is pinned to hold the nozzle dam against radial surface 68 machined in nozzle 16.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.