Face seal with automatic face convergence means
US4722534A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1985 |
| Grant date | Feb 2, 1988 |
| Priority date | — |
| Expiry date | Dec 18, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3464
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A controllable mechanical seal for sealing a rotating body relative to a housing of a fluid device. The mechanical seal includes a pair of seal rings supported in juxtaposed relation in said housing. Each seal ring has a cylindrical outer surface and a radial end sealing face which, at a given operating condition of the machine, has a predetermined optimum convergence angle relative to the other seal ring face. The sealing faces are yieldably biased into contact with one another to define a dynamic seal there between. A seal ring support member is telescopically arranged about the outer cylindrical surface of one of said ring such that exposed surface area end regions of the cylindrical surface of the support ring are subjected to selectable differential pressures which cause the associated seal ring to distort thereby causing the seal face of the associated ring to assume a select angle of convergence relative to the seal face of the other seal ring. A sensor may be provided for automatically controlling the angle of convergence between the seal faces as a function of machine operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.