Piston ring assemblies for high temperature seals
US5520398A · kind A · utility
Inventor
Key dates
| Filing date | Jan 25, 1994 |
| Grant date | May 28, 1996 |
| Priority date | — |
| Expiry date | Jan 25, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/28
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a turbine inclusive of:a turbine shaft having a longitudinal axis, a steam pipe, a shell circumadjacent the pipe, the pipe and shell being shiftable in vertical and transverse and axial directions relative to the longitudinal axis of the shaft, and a seal assembly disposed between the pipe and shell and comprising a stack of interdigitated relatively large and small piston rings, the improvement comprising: placement of the stack of large and small rings into a circular container which is inserted into the shell with adequate clearance to permit thermal expansion, the container being provided with a flexible seal to the shell and having thermal inertia similar to that of the rings and the pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.