Non-contacting shaft sealing device with grooved face pattern
US5501470A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1993 |
| Grant date | Mar 26, 1996 |
| Priority date | — |
| Expiry date | Dec 2, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C33/741
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a non-contacting shaft sealing device of the type wherein a sealing end face of a case seal and a sealing end face of a rotary shaft seal rotate relative to each other in a non-contacting state while being separated by a film of fluid derived from the high pressure region being sealed, one sealing end face is provided with an even number of dynamic pressure generating groove groups arranged in the peripheral direction on the sealing end face. Each dynamic pressure generating groove group has plural approximately L-shaped linear dynamic pressure generating grooves each composed of a fluid lead-in part extending in the radial direction from the peripheral edge of the sealing end face so as to communicate with the high pressure region, and a dynamic pressure generating part extending in the peripheral direction from the end portion of the fluid lead-in part with the dynamic pressure generating grooves not crossing each other and being arranged in the radial direction. Two adjacent dynamic pressure generating groove groups are symmetrical around the diametral line of the sealing end face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.