JPH0681849A - Method and device for discharging grease from bearing - Google Patents

Abstract

PURPOSE:To prevent grease from its outflow, scatter, peripheral contamination, etc., from a seal part or the like by providing a pipe for discharging grease in a bearing, and forcing the grease discharged. CONSTITUTION:Grease is fed to a bearing 4 through a distribution valve 3 from a grease feed pipe 2, and after passing through in the bearing, the grease, passing through a grease discharge pipe 8, is sucked out by compressed air 21 supplied from a supply pipe 22 by an ejector 20. The sucked out discharge grease, passing through a discharge pipe 23, is collected to a collector tank 24. The compressed air 21 is used as fluid, but not limited, and a similar effect is obtained even when used another pressure liquid of water, oil, etc. By the above constitution, an accident of outflow, scatter, peripheral contamination, etc., of grease, due to excessive supply of grease and improper designing the grease discharge pipe, is solved, to eliminate necessity for inspecting work for a discharge grease receiving plate or its periphery arranged in a bearing grease discharge pipe.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for discharging used grease from bearings that are automatically lubricated in steelmaking equipment.

[0002]

2. Description of the Related Art Generally, an automatic greasing device is used for lubrication of large-sized mechanical equipment such as iron-making equipment having a large number of bearings. The automatic greasing device is a system that supplies a constant amount of grease to a bearing that receives greasing at certain time intervals. As shown in FIG. 6, the pressure-increased grease 1 is supplied to a greasing pipe 2 and a distribution valve 3. It supplies to each bearing 4 via.

On the other hand, in a bearing that receives grease, generally, as shown in FIG. 3, grease 1 is greased from an upper greasing port 6, and after the grease 1 lubricated lubricates the bearing 4, a bearing case 7 is formed. It is discharged from the drainage pipe 8 provided at the lower part of the. The grease discharge pipe 8 is usually provided with a relief valve 9 (FIG. 5) for discharging grease and a simple pipe 10 (FIG. 4). Further, a tray 11 for collecting the discharged grease is installed at the end of the drainage pipe 8.

[0004]

However, in such a greasing device, (1) when the greasing is excessive, (2) when the greasing pipe is too long, (3) when the relief pressure for greasing is set excessively, etc. Has a problem that the grease is not discharged from the grease discharge pipe 8 and flows out from the seal 13 of the shaft of the roll 12 or the like to stain the product conveyed on the roll 12 or stain the bearing periphery. It was

Further, even if the grease is drained from the grease drain pipe, it takes a lot of labor to inspect and clean the tray 11 for the discharged grease, and the troublesome work such as cleaning the tray and the surroundings is involved, and the work itself and the working environment, etc. It was a bad condition in terms of. The present invention focuses on the above-mentioned conventional problems, and an object thereof is to provide an efficient means for discharging grease used in a bearing of an automatic greasing device.

[0006]

In order to achieve the above object, the present invention is a method for draining grease of a bearing, characterized in that the bearing is provided with a grease drainage pipe to forcefully discharge the grease. As a device for suitably implementing this method,
Use a device that installs a greasing pipe on the anti-greasing port side of the bearing, installs an ejector at its end, and passes compressed air or liquid with a high flow rate through the ejector to make the greasing pipe side a negative pressure. .

[0007]

The present invention makes it possible to automatically remove grease from a bearing equipped with an automatic grease supply device. By sucking and discharging deteriorated grease, leakage from seals and the like is prevented, and surrounding contamination and contamination are prevented. Eliminate problems such as cleaning. The ejector can be easily installed without the need for a special device by using the compressed air installed in the factory.
It is a maintenance-free device.

[0008]

FIG. 3 shows a conventional bearing. After the grease 1 supplied from the greasing port 6 lubricated the bearing 4 in the bearing case 7, it was discharged from the greasing pipe 8, but sometimes the seal 13
From the roll to the roll 12 side. FIG. 1 shows an embodiment of the present invention. The structure of the bearing itself is the same as that of the conventional one, but the feature is that the ejector 20 is connected to the end of the grease discharge pipe 8.

In the present invention, the ejector 20 is supplied with compressed air 21. The action of the ejector 20 is
By narrowing the flow part of the fluid in the main body and increasing the flow velocity in that part, the static pressure on the side of the grease discharge pipe 8 that is joined to the high flow velocity part is made a negative pressure and the inside of the grease discharge pipe 8 is reduced. Grease is sucked out. The sucked grease is discharged together with the fluid flow.

FIG. 2 shows the entire system. The grease lubricated from the greasing pipe 2 to the bearing 4 via the distribution valve 3 passes through the bearing, and then passes through the greasing pipe 8 to the ejector 20.
The compressed air 21 supplied from the supply pipe 22 is sucked out. The discharged grease that has been sucked out is collected in the collection tank 24 through the discharge pipe 23. In this embodiment, the compressed air 21 is used as the fluid, but the present invention is not limited to this, and the same effect can be obtained by using a pressurized liquid such as water or oil. In addition to the system shown in FIG. 2, the used fluid may be regenerated and recycled for use, and the same effect can be obtained.

At the mounting position of the grease discharge pipe of the bearing, it is necessary to prevent the grease from being discharged more than the amount necessary for lubricating the bearing, and to prevent heat generation due to the filling of the grease in the bearing, one of the internal capacity of the bearing is set. Select a position that is about / 3.

[0012]

EFFECTS OF THE INVENTION The present invention has solved the problems such as excessive grease supply and grease drainage, poor grease design, and grease spillage, scattering, and dirt on the surroundings. In addition, there is no longer any need to inspect and work around the grease discharge tray installed in the bearing grease drain pipe and its surroundings. Moreover, although the amount of greasing was reduced to prevent contamination around the bearings in the past, accidents such as bearing seizures occurred, and the amount of grease in the grease leaked out while the amount of grease was reduced Had occurred, but these accidents have almost never occurred.

[Brief description of drawings]

FIG. 1 is a sectional view showing a bearing structure of an embodiment.

FIG. 2 is a greasing system diagram of an example.

FIG. 3 is a cross-sectional view showing a conventional bearing structure.

FIG. 4 is a cross-sectional view showing a conventional greasing structure.

FIG. 5 is a cross-sectional view showing a conventional greasing structure.

FIG. 6 is a conventional greasing system diagram.

[Explanation of symbols]

 1 Grease 2 Greasing pipe 3 Distribution valve 4 Bearing 6 Greasing port 7 Bearing case 8 Greasing pipe 12 Roll 13 Seal 20 Ejector 22 Fluid supply pipe 23 Discharge pipe 24 Recovery tank

Claims (2)

[Claims] 1. A method for draining grease from a bearing, characterized in that a grease drainage pipe is provided on the bearing to forcefully discharge the grease. 2. A grease removing device for a bearing, characterized in that a grease discharging pipe is provided on the bearing, an ejector is connected to an end thereof, and a compressed air or liquid supply pipe having a high flow rate is connected to the ejector.