Radial roller bearing, rotary machine including radial roller bearing, and method for designing radial roller bearing

摘要

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).

主权项

1. A radial roller bearing comprising:
an outer ring member; a plurality of roller members that roll on an inner surface of the outer ring member; and a retainer, a lubricating oil being supplied between the outer ring member or a rotating shaft and the roller members, wherein the circularity of the roller members in a cross section perpendicular to a centerline thereof is set to be lower than or equal to the minimum oil film thickness of an oil film formed by the lubricating oil.