Non-contacting shaft sealing device
US5664787A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1996 |
| Grant date | Sep 9, 1997 |
| Priority date | — |
| Expiry date | Feb 23, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3412
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A non-contacting shaft sealing device comprises an even number of dynamic pressure generating grooves arranged in the peripheral direction on a sealing end face of either the seal case side or the rotary shaft side. Each dynamic pressure generating groove comprises a shallow L-shaped groove of a specific groove width and depth and includes a fluid lead in part extending in the radial direction from a peripheral edge of the high pressure side of the sealing end face and a dynamic pressure generating part extending in the peripheral direction from the end portion thereof. Each groove is symmetrical with respect to one adjacent groove on one side thereof around a first sealing end face diametral line passing between adjacent fluid lead-in parts or symmetrical with respect to a second groove on the other side around a second sealing end face diametral line passing between the dynamic pressure generating grooves. The groove land ratio .theta..sub.1 /.theta..sub.2 in the peripheral direction is 0.5 to 0.9 wherein the angle of intersection .theta..sub.1 is the angle between a third sealing end face diametral line running along the fluid lead-in part of the dynamic pressure generating groo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.