JP2586173Y2 - Oil ring self-lubricating bearing - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil ring self-lubricating bearing applied to a centrifugal fan, an axial centrifugal blower, an axial fan, an electric motor, a pump and the like.

[0002]

2. Description of the Related Art FIG. 8 shows a side view of a conventional centrifugal fan, wherein a is a fan casing, b is a drive device, c is a bearing (oil ring self-lubricating bearing), and d is a fan rotating shaft. FIG. 9 is a detailed sectional view of the oil ring self-lubricating bearing indicated by the reference numeral c in FIG. In FIG. 9, 1 is the upper half of the bearing box, 2 is the lower half of the bearing box, 3 is the oil drain, 4 is the rotating shaft, 5 is the upper half of the bearing body, 6 is the lower half of the bearing body, 7 is the lubricating oil, Reference numeral 8 denotes an oil ring, and 9 denotes a bearing mount. FIG. 10 is a sectional view taken along the line H-H in FIG.

8 to 10, when the fan rotating shaft 4 is rotated by the driving device b, the oil ring 8
On the other hand, it rotates while sliding with a certain slip ratio. Since the lower part of the oil ring 8 is located in the lubricating oil 7 in the lower half 2 of the bearing box serving as an oil bath, the oil ring 8 rotates while attaching the lubricating oil 7 to the surface of the oil ring 8. 4
And fall at the horizontal joint of the lower half 6 of the bearing body. In FIG. 10, the lubricating oil attached to the rotating shaft 4 and the lubricating oil that has dropped into the lateral joint groove B of the lower half 6 of the bearing body are drawn into the inner periphery of the lower half 6 of the bearing body by the rotating force of the rotating shaft 4. To form an oil film and lubricate. However, as shown in FIG. 10, in the conventional structure, the lubricating oil adhering to the oil ring 8 flies due to centrifugal force or the lower half 6 of the bearing body.
And overflowed from the lateral joint groove B, and could not be used effectively.

[0004]

In the conventional structure shown in FIGS. 8 to 10, of the lubricating oil adhering to the surface of the oil ring 8, the oil adhering to the side surface and the outer peripheral surface of the oil ring is effectively used. There was a disadvantage that the lower half 6 of the bearing body could not be recovered. Oil can be drawn into the lower half 6 of the bearing body only from the groove B for the oil ring provided in the lower half 6 of the bearing body, and the draw-in opening is small in structure and the amount of drawn-in oil is small. was there. The present invention provides an oil ring self-lubricating bearing that increases the amount of lubricating oil by forcibly sending the lubricating oil attached to the oil ring to each central portion of the lower half of the bearing body by the rotating force of the rotating shaft. It is something you want to do.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention provides a rotating shaft supported by an upper half of a bearing body and a lower half of a bearing body held by an upper half of a bearing housing and a lower half of a bearing housing. To
In an oil ring self-lubricating bearing, an oil ring whose lower part is immersed in lubricating oil in an oil reservoir formed by the lower half of the bearing box is hung on a rotating shaft and rotates while sliding on the rotating shaft. At the top of the upper half of the bearing body,
An oil ring rotation guide for scraping off the lubricating oil adhering to the oil ring is provided, and an oil groove is provided on the inner peripheral surface of the upper half of the bearing body, and oil is forcibly supplied from the oil groove into the lower half of the bearing body. This is used as a means for solving the problem.

[0006]

The lubricating oil adhering to the oil ring is dropped and collected by the oil ring rotation guide in the upper half of the bearing body.
And the oil accumulated in the rotation guide part is forcibly drawn into the oil groove by the oil groove twisted in the rotation direction provided in the white metal on the inner periphery of the upper half of the bearing body and the rotation force of the rotating shaft,
The oil groove guides the bearing to the center of the horizontal joint in the lower half of the bearing body.
The oil guided to the center of the lower half of the bearing body as described above spreads in the axial direction and is drawn into the bearing inner periphery by the rotational force of the rotating shaft.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of an oil ring self-lubricating bearing according to an embodiment of the present invention; FIG. In the drawing, 1 is the upper half of the bearing housing, 2 is the lower half of the bearing housing, 3 is the oil drain, 4 is the rotating shaft, 5
Is the upper half of the bearing body, 6 is the lower half of the bearing body, 7 is the lubricating oil,
Reference numeral 9 denotes a bearing mount, which is the same as the conventional one shown in FIG. The difference between the oil ring 1 and the oil ring 1 shown in FIG.
0, oil ring rotation guide 11, white metal 12
Is provided.

When the fan rotation shaft 4 rotates in FIGS. 1 to 4, the oil ring 10 in contact with the upper portion of the rotation shaft 4 rotates while sliding on the rotation shaft 4. The lower part of the oil ring 10 is located in the lubricating oil 7, and the oil ring 10 rotates with the lubricating oil attached to the surface. The lubricating oil adhering to the oil ring 10 is scraped off by the oil ring rotation guide 11 at the top of the upper half of the bearing body, and accumulates in the rotation guide 11. On the other hand, the oil groove C shown in FIGS. 3 to 7 is provided in the white metal 12 on the inner periphery of the upper half part of the bearing body up to the axial oil groove D of the horizontal joint in a state where the oil groove C is twisted in the rotational direction from the side of the rotation guide 11. . An oil groove G is also provided in the axial direction in the horizontal joint of the lower half 6 of the bearing body.

For this reason, the lubricating oil accumulated in the rotary guide 11 is forcibly drawn into the oil groove C by the rotational force of the rotary shaft 4 and guided to the axial oil groove D through the oil groove C. .
The lubricating oil guided to the part D is the lower half part 6 of the bearing main body shown in FIG.
6 and 7, the lower half portion 6 of the bearing body is rotated by the rotational force of the rotary shaft 4 as shown in FIGS.
The lubrication action is performed by being drawn into the inside. 2 and 3 show a state in which the lubricating oil adhered to the oil ring 10 is collected by the rotation guide 11, and FIG.
Shows a state in which lubricating oil accumulated in the bearing is drawn into the bearing body.

[0010]

As described in detail above, according to the present invention, most of the lubricating oil adhering to the oil ring can be recovered, and the recovered lubricating oil is forcibly forced by the rotational force of the rotating shaft. Can be led to the department. For this reason, the lubricating oil can be supplied over the entire length of the bearing with a larger amount of lubricating oil than in the past, so that the load capacity of the bearing can be improved.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an oil ring self-lubricating bearing showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line BB of FIG. 1;

FIG. 3 is a view taken in the direction of arrow A in FIG. 2;

FIG. 4 is a sectional view taken along line D-D of FIG. 3;

FIG. 5 is a plan view of the upper half of the bearing main body of FIG. 1;

FIG. 6 is a sectional view taken along line E-E of FIG. 5;

FIG. 7 is a sectional view taken along line FF of FIG. 6;

FIG. 8 is a side view of a conventional centrifugal fan.

FIG. 9 is a side sectional view of the oil ring self-lubricating bearing in FIG. 8;

FIG. 10 is a sectional view taken along the line H-H in FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper half of bearing box 2 Lower half of bearing box 3 Oil drain 4 Fan rotation shaft 5 Upper half of bearing body 6 Lower half of bearing body 7 Lubricating oil 9 Bearing mount 10 Oil ring 11 Oil ring rotation guide 12 White metal

Claims (1)

(57) [Scope of request for utility model registration] 1. A rotating shaft supported by an upper half of a bearing body and a lower half of a bearing body held by an upper half of a bearing housing and a lower half of a bearing housing, and formed by the lower half of the bearing housing. An oil ring whose lower part is immersed in the lubricating oil of the oil sump is hung on a rotating shaft, and is configured to rotate while sliding on the rotating shaft. At the top, an oil ring rotation guide for scraping off the lubricating oil adhering to the oil ring is provided, and an oil groove is provided on the inner peripheral surface of the upper half of the bearing body. Oil ring self-lubricating bearing characterized by lubricating.