Radial roller bearing, rotary machine including radial roller bearing, and method for designing radial roller bearing
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United States of America Patent
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Jul 26, 2016
Grant Date -
Sep 18, 2014
app pub date -
Oct 23, 2012
filing date -
Oct 31, 2011
priority date (Note) -
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Abstract
The properties of lubricating oil are utilized to avoid excessive quality in terms of the circularity of roller members while reducing the noise from a radial roller bearing alone during rotation and thereby reducing the noise from a rotary machine. The radial roller bearing includes an outer ring member (30A), a plurality of roller members (30B), and a retainer, and a lubricating oil (O) is supplied between the outer ring member (30A) or a rotating shaft and the roller members (30B). The circularity (ΔR) of the roller members (30B) in a cross section perpendicular to a centerline (CL) thereof is set to be lower than or equal to the minimum oil film thickness (hmin) of an oil film formed by the lubricating oil (O).
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