Double-row self-aligning roller bearing

Abstract

In this double-row self-aligning roller bearing (1), rollers (4, 5) are interposed, between an inner race (2) and an outer race (3), in two rows beside each other in the axial width direction of the bearing, a raceway surface (3a) of the outer race (3) is spherical, and the outer peripheral surfaces of the two rows of rollers (4, 5) have a cross-sectional shape that conforms to the raceway surface(3a) of the outer race (3). The two rows of rollers (4, 5) have different lengths (L1, L2) and the length (L1) of the long roller (5) is at least 39% of the bearing width (B). The ratio of the contact angle (theta1) of the short roller (4) to the contact angle (theta2) of the long roller (5) is within the range 1:2 to 1:4. Thus, the present invention can simultaneously receive both axial load andradial load, can be used in applications in which loads of different sizes act on two rows of rollers beside each other in the axial direction, and makes it possible to sufficiently increase, withinthe constraints of boundary dimensions, the load capacity of the roller in the row that receives the axial load.

Description

[0001] related application [0002] This application requires that the application date is March 24, 2016, and the application number is JP Special Application No. 2016-59473; the application filed on the same day is the application number of JP Special Application No. 2016-59474; the application date is March 10, 2017, The priority of the application No. JP Japanese Patent Application No. 2017-45679 and the application date of March 14, 2017 and the application No. JP Japanese Patent No. 2017-48527 are taken as constituting the present application by referring to the entirety thereof. Part of the content is cited. technical field [0003] The present invention relates to a double-row self-aligning roller bearing, which is used in applications where uneven loads are applied to two rows of rollers arranged side by side in the width direction of the bearing, such as supporting wind power generators, main shafts of industrial machinery, etc. occasions. Background technique ...

AI Technical Summary

Problems solved by technology

As a result, compared with the row of rollers 44 receiving a radial load, the contact surface pressure of the row of rollers 45 receiving an axial load becomes larger, and the rolling surface of the rollers 45 and the raceway surface 43a of the outer ring 45 tend to be formed. Surface damage, wear, short rolling life

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