JPS6275122A - Rotary shaft supporting device of vertical high-speed rotor - Google Patents

Abstract

PURPOSE:To suppress the occurrence of seizure and abrasion at a lower bearing section by supporting the lower section of a rotary shaft with the lower bearing and providing a thrust bearing between a bearing case and a lower casing corresponding to this case. CONSTITUTION:A lower ball bearing 11 is elastically supported to a low casing 14 with an O ring 13 in the radial direction via a bearing case 12.A thrust bearing 20 is provided in point contact between the bearing case 12 and the lower casing 14. That is, a thrust plate 21 is press-fit and fixed into the bearing case 12, and thrust plate 22 is press-fit and fixed into the bearing casing 14 against the thrust plate 21. Multiple steel balls 23 are brought into point contact with the thrust plates 21, 22 respectively and supported by a retainer 24.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a rotating shaft support device for a vertical high-speed rotating body.

[Background of the invention]

The rotating shaft support device for a vertical high-speed rotating body includes an upper ball bearing that supports the upper part of the rotating shaft, and an O IJ that supports the bearing.
There is known a device that includes a ring, a preload spring, a lower ball bearing that pivotally supports the lower part of the one-rotation shaft, and an O-ring that supports the bearing.

In this type of support *t, there is surface contact between the bearing case of the lower ball shaft, which is the lower bearing part that bears the overall weight, and the corresponding lower casing, which may cause seizure or thickening. There is a problem in maintaining stable rotation of the rotating shaft.

An example of a related device of the second type is JP-A-58-150096.

[Purpose of the invention]

An object of the present invention is to provide a rotating shaft support IJr for a vertical high-speed rotating body that can maintain stable rotation of the single rotating shaft by suppressing the occurrence of seizure and wear in the lower bearing part that bears the entire weight B.
The aim is to provide IJ.

rSummary of the Invention] ゛The present invention provides an upper shaft for pivotally supporting the upper part of the rotating shaft of a vertical high-speed rotating body, a base support means for supporting a pI ball bearing, and a lower part for pivotally supporting the lower part of the rotating shaft. with bearings.

By comprising a lower support means for supporting the bearing and a thrust bearing provided in point contact between the bearing case of the lower bearing and the lower casing corresponding to the case, the bearing can bear the entire weight. This is an attempt to suppress the occurrence of seizure and wear in the lower bearing.

[Embodiments of the invention]

An embodiment of the present invention will be described with reference to the drawings.

In the drawing, the lower part of one rotational shaft, for example, an electric motor shaft 10 of a high-frequency motor, is supported by a lower bearing 1, for example, a lower ball bearing 11. The lower ball bearing 11 has lower support means radially via the bearing case hill, e.g.

It is elastically supported by the lower casing 14 by an O-ring U. A thrust bearing is provided between the bearing case and the lower casing 14 in point contact.

That is, the thrust plate 4 is press-fitted and fixed into the bearing case 13, and the thrust plate n is press-fitted and fixed into the lower casing 14, facing the thrust plate O.

A plurality of steel balls are each supported by point contact antennas on the thrust plate 4.22. The thrust plate is filled with lubricating oil up to its lower end. The bottom of the motor shaft 10 is supported by an upper bearing (not shown) such as a ball bearing, and the upper bearing is supported by upper support means (not shown) such as an O-ring or a preload spring.

In the drawing, if the O-ring damper moves due to resonance etc. and a small vibration part is generated, the lower part that bears the entire weight comes into contact with the skin, and the movement in the 11 radial direction is smooth due to the thrust bearing force. be converted into Therefore, the occurrence of seizure and wear in the lower bearing part can be suppressed. Stable rotation of the shaft can be well maintained. Additionally, the lubricating oil can be expected to have a damping effect.

〔Effect of the invention〕

As explained above, the present invention can suppress the occurrence of seizure and wear in the lower bearing portion, which bears the entire weight, and has the effect of successfully maintaining stable rotation of the rotating shaft.

[Brief explanation of drawings]

The drawings show a special rotating shaft support for a vertical high-speed rotating body according to the present invention.
FIG. 2 is a vertical i-plane view of main parts showing one embodiment of the present invention.

Claims (1)

[Claims] 1. An upper bearing that pivotally supports the upper part of the rotating shaft of the vertical high-speed rotating body, an upper supporting means that supports the bearing, a lower bearing that pivotally supports the lower part of the rotating shaft, and a lower supporting means that supports the bearing. and a thrust bearing provided in point contact between a bearing case of the lower bearing and a lower casing corresponding to the case.