JPS6014076Y2 - bearing device - Google Patents

Description

[Detailed description of the invention] This invention usually uses a forced lubrication device and a self-lubrication device.
The present invention also relates to a bearing device configured to supply oil between a rotating shaft and a bearing using a self-lubricating device when the forced oiling device is abnormal.

A conventional bearing device of this type will be explained with reference to FIGS. 1 and 2.

In the figure, 1 is a bearing that rotatably supports a rotating shaft 2, and 3 is a bearing that rotatably supports a rotating shaft 2.
Reference numeral 4 denotes an oil supply pipe that guides lubricating oil supplied by a forced oil supply device (not shown) between the rotating shaft 2 and the bearing 1, and 4 stores therein the lubricating oil 5 that lubricates the space between the rotating shaft 2 and the bearing 1. A bearing box 6 is provided with an opening 6a in the side wall of the bearing box 4 to drain the lubricating oil 5 and keep the lubricating oil level in the bearing box 4 constant; 7 is suspended on the rotating shaft 2 and the lower part is a bearing box. An oil ring 8 is immersed in the lubricating oil 5 in the box 4, and 8 is a bearing stand that supports the bearing 1. The lubricating oil 5 adhering to the oil ring 7 is pumped up as the rotating shaft 2 rotates, and the oil ring 8 is immersed in the lubricating oil 5 inside the box 4. It constitutes a self-lubricating device that supplies lubricating oil 5 between the two.

In addition to the self-lubricating device constructed by the illustrated oil ring 7, there is also a self-lubricating device constructed by an oil disk, but for the sake of explanation, the case of an oil ring will be explained as an example.

The bearing device configured as described above normally uses lubricating oil supplied from the forced lubrication device via the oil supply pipe 3 and lubricating oil pumped up by the oil ring 7, and in the event of an abnormality in the forced lubrication device, the lubricating oil is pumped up by the oil ring. The lubricating oil provided lubricates the space between the rotating shaft 2 and the bearing 1.

By the way, in the bearing device configured in this way, even if the forced lubrication device fails and lubricating oil is not supplied from the lubrication device, the lubricating oil 5 pumped up by the oil ring 7 will maintain the relationship between the rotating shaft 2 and the bearing 1. Although lubrication is performed, for example, if such a bearing device is installed in a place such as a ship that is inclined due to the flow line, and if this situation continues, there are disadvantages as described below.

That is, since the bearing device configured in this manner has the opening 6a of the oil drain passage 6 in the side wall of the bearing box 4, when the bearing device is tilted, the lubricating oil 5 in the bearing box 4 is discharged from the oil drain passage 6. As a result, the level of lubricating oil 5 drops as shown by the dashed line.

For this reason, the oil ring 7 is no longer immersed in the lubricating oil 5, and the lubricating oil 5 cannot be pumped up by the oil ring 7, and there is a risk that the rotating shaft 2 and the bearing 1 will be burnt out.

The present invention was developed in view of the above drawbacks, and even if the forced lubrication system is stopped and tilted, the lubricating oil level in the bearing box is maintained and the lubricating oil adheres to the oil ring. The purpose of the present invention is to provide a bearing device that does not burn out due to overheating.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 3 and 4, but the same parts as in FIGS. 1 and 2 are designated by the same reference numerals, and the explanation thereof will be omitted.

That is, the difference from FIG. 1 is that an oil drain pipe 10 that opens upward is provided at approximately the center of the bearing box 4, and this oil drain pipe 10 provides an oil drain passage l that maintains the lubricating oil level at an appropriate level.
It is formed by forming ea.

Next, the action will be explained.

In the horizontal position, the level of lubricating oil 5 is in the normal position,
As shown in the figure, even if the bearing device is tilted, the level of the lubricating oil 5 remains lower than the normal position.The amount of oil discharged from the oil drain passage 10a is smaller than the normal position. can be secured.

Therefore, the oil ring 7 is immersed in the lubricating oil 5 at all times, and the lubricating oil 5 is sufficiently supplied between the rotating shaft 2 and the bearing 1 by the oil ring 7, so even if the bearing device is tilted, The rotating shaft 2 and the bearing 1 are prevented from being overheated and burnt out.

Figures 6 and 7 show other embodiments.
The difference from the drawings and FIG. 2 is that a hole 11a opening in the axial direction is provided in the center of the bearing pedestal 8, and an oil drain passage 11 for maintaining the lubricating oil 5 at an appropriate level is formed.

The bearing device configured in this manner can reduce the amount of oil discharged from the oil drain passage 11, as shown in FIG. 5, and can prevent the rotating shaft 2 and the bearing from burning out even if the operation is continued in an inclined state. do not have.

Moreover, since the bearing stand 8 is provided with an opening, even if an axial tilt occurs, the amount of oil discharged can be similarly reduced.

As described above, according to the present invention, the bearing device is provided with an oil drain passage that opens at the center of the bearing box and maintains the lubricating oil level at an appropriate level, so even when the forced lubrication device is stopped, Even if the bearing device is tilted, the lubricating oil in the bearing box does not decrease, so that the oil ring is sufficiently immersed in the lubricating oil, thereby preventing overheating and burnout of the rotating shaft and the bearing.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view showing a conventional bearing device, and Figure 2 is a vertical cross-sectional view of a conventional bearing device.
3 is a vertical sectional view showing an embodiment of the bearing device of the present invention, and FIG. 4 is a longitudinal sectional view taken along line A-A in the figure.
A vertical cross-sectional view along the line, FIG. 5 is a vertical cross-sectional view showing an inclined state,
FIG. 6 is a longitudinal sectional view showing another embodiment, and FIG. 7 is a longitudinal sectional view taken along line CC in FIG. 1...bearing, 2...rotating shaft, 3...
... Oil supply pipe, 4 ... Bearing box, 5 ...
...Lubricating oil, 7...Oil ring, Death...
・Bearing stand, 10... Oil drain pipe, 10a...
... Oil drain passage, 11... Oil drain passage.

Claims (1)

[Claims for Utility Model Registration] 1. A bearing that rotatably supports a rotating shaft, a forced oil supply device that forcibly supplies lubricating oil between the rotating shaft and the bearing via an oil supply pipe, and a bearing box that stores lubricating oil that lubricates between the shaft and the bearing; an oil drain passage that drains the lubricating oil in the bearing box and maintains the level of the lubricating oil in the bearing box; A self-lubricating device comprising a self-lubricating device whose lower part is immersed in lubricating oil and pumps lubricating oil between the rotating shaft and the bearing using an oil ring suspended on the rotating shaft or a fixed oil disk, wherein the opening of the oil drain passage is A bearing device characterized in that it is provided in the center of a bearing box. 2. The bearing device according to claim 1, wherein the oil drain passage is formed by an oil drain pipe. 3. The bearing device according to claim 1, wherein the oil drain passage is formed in the bearing stand of the bearing.