Vibration damping mechanism for bearing

Abstract

A squeeze film damper bearing easily manufacturable, having excellent productivity, and reduced in size and a vibration damping mechanism for the rolling bearing capable of having an effect on loads in two of radial and thrust directions. In the vibration damping mechanism (1) for the rolling bearing, a storage hole (16) having a diameter larger than the diameter of the outer periphery (14) of the bearing is formed on the inside of a housing (15) and an oil supply hole (19) supplying an oil into the storage hole is formed in the wall of the housing (15), the bearing is inserted into the storage hole to form an annular clearance (18) on the outer periphery of the bearing, and a thin flat plate (17) having a plurality of slits is inserted into the annular clearance along the circumferential direction. The portions of the thin flat plate held by the slits are formed in an elastic beam to elastically support the bearing at a center position, and the vibration of the bearing is damped by a squeeze film action caused by an oil film generated by supplying the oil into the annular clearance.

Description

Technical field [0001] The present invention relates to a bearing vibration damping mechanism that applies a damping effect to a rolling bearing, and particularly relates to an additional mechanism for easily adjusting the attenuation characteristics of a squeeze film damping bearing. Background technique [0002] Rolling bearings have less friction loss than sliding bearings, so they are used in many machines. However, due to structural reasons, rolling bearings can hardly be expected to effectively dampen vibrations that become a problem when passing at dangerous speeds. Therefore, in order to reduce the mechanical vibration and the dynamic load of the bearing, and to improve the life of the bearing, a damper that adds attenuation to the bearing is used. [0003] Among the dampers used for rolling bearings, there are squeeze film dampers. [0004] The squeeze film damper is suitably used on the outer circumference of the bearing. With the help of the squeeze film produced by th...

AI Technical Summary

Problems solved by technology

[0010] According to the disclosed method, compared with the prior art, it can be manufactured at low cost, miniaturized, and the spring constant can be varied in a wide range. However, since the concentric spring is molded by pressing, it is difficult to make multiple The height of each protrusion is consistent with high precision, and it is also difficult to design and manufacture in a manner that maintains arbitrary rigidity.

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