Rolling element bearing for ultra-low viscosity fluids
US7090404B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2002 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Nov 5, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C33/6659
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rolling element having comprises an inner ring, an outer ring and a series of rolling elements which are in contact with the raceways of the rings, an ultra-low viscosity fluid being present in the contacts having a kinematic viscosity ν=(ηo/ρ) of less than 2 mm2/s, wherein the surfaces of the rings and the rolling elements have asperities which can have solid-to-solid contact during operation of the bearing. A factor <i>Dq</i> is defined which is equal to (I) whereby the solid-to-solid contact of the asperities is reduced by selecting such design parameters and operating conditions of the bearing that <i>Dq</i> is in the range from 8.0×10−6 mrad s1/2 to 1.36×10−4 mrad s1/2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.