JPS5857596A - Lubricating device for rolling mill - Google Patents

Abstract

PURPOSE:To enable to make an underground room small and consequently reduce the expense of civil engineering works by a method wherein a suction and discharge device is provided in the midway of the oil return pipe of a rolling mill. CONSTITUTION:The lubricating oil supplied to machines 3 flows by its own weight from the oil exhaust port of each machine 3 into the oil return pipe 4. A forced oil pumping-back device 5 sucks the lubricating oil 6 in the return pipe 4 in itself and sends through a piping 7 back to a tank 2. In such a manner as mentioned above, because of the suction force of the forced oil pumping-back device 5, no or slight gradient of the oil return pipe 4 is enough for the flow of the lubricating oil 6, resulting in necessitating no deeper underground room. Furthermore, because only the forced oil pumping-back device 5 is installed in the underground room 1, a very small space is enough for the underground room 1.

Description

Detailed Description of the Invention The present invention relates to a forced circulation lubrication system (hereinafter referred to as lubrication system) that supplies lubricating oil to gears, bearings, etc. of machinery, and is particularly suitable for use in rolling equipment that requires a basement. Regarding equipment.

Conventional oil supply systems for rolling equipment are generally installed in basements. In this case, the depth of the basement is determined by the slope and length required for the natural fall of the oil return pipe that returns the lubricating oil supplied to the machine to the oil supply system. In rolling equipment, the slope of the oil return pipe is l/25 to l/35, and its length is 10
Depending on this slope, the depth of the basement can be 3 to 30 m.
It would have to be 4m deeper, and a large space would be needed in the basement to install equipment such as tanks. Depending on the arrangement of the machines, it may not be possible to provide sufficient space in the basement, and if the space in the basement is large, the cost of civil engineering work will increase.

An object of the present invention is to reduce the cost of civil engineering work by reducing the size of a basement, and to provide a refueling device for rolling equipment that can be installed above ground.

A feature of the present invention is that a suction and discharge device is provided in the middle of the oil return pipe for rolling equipment.

FIG. 1 is a sectional view of the rolling equipment of the present invention.

Tank 2 contains lubricating oil 6. Although not shown in the drawing, tank 2 has a fuel pump and piping.
The lubricating oil 6 is sucked in and supplied to the gears, bearings, etc. of the machine 3 via the ground. The supplied lubricating oil 4 flows from the oil drain hole at the bottom of the casing of the machine 3 to the oil return pipe 4 due to its own weight. The strong III oil return device 5 (specifically, for example, a screw pump) returns the lubricating oil 6 in the oil return pipe 4 to the tack 2 through the suction pipe 7. In this way, due to the suction force of the forced oil return device 5, the slope of the oil return pipe 4 can be set to zero or to an extent that prevents dirt from remaining in the oil return pipe 4.
Basement 1 is not deep. Only the forced oil return device 5 is installed in the basement 1, and a very small basement is sufficient. Therefore, there is no need for a deep and large basement as was the case in the past (Fig. 1). The forced oil return device 5 needs to suck in not only the lubricating oil 6 but also air. In other words, the forced oil return device 5 is determined by the amount of lubricating oil 6 supplied to the machine 3.
There are times when only air is sucked in, in order to fully absorb the lubricating oil 6 at the bottom of the casing of the machine 3. Therefore, using the head difference between the tank 2 and the forced oil return device 5, lubricating oil 6 is supplied to the bearing portion of the forced oil return device 5 through the piping 8 and the on-off valve 9 to prevent seizure of the bearing portion.

If there is no space above ground, the basement is narrow, and there are two or more refueling devices, the conventional technology shown in FIG. 2 is used. $3
In the figure, the tanks 2 are stacked in two stages, and the upper tank 2 is equipped with a forced oil return device 5 to return lubricating oil 6 to the tank 2. In this case as well, since the forced oil return device 5 sucks air, in order to prevent the bearing portion of the forced oil return device 5 from seizing, a small capacity pump 10 is provided to supply lubricating oil 6 to this portion to lubricate it. .

In this way, equipment can be installed in a basement that takes about half the space compared to conventional ones.

According to the present invention, the basement can be made smaller, so construction costs can be reduced.

[Brief explanation of drawings]

FIGS. 1 and 3 are system sectional views of a conventional oil supply system for rolling equipment, and FIG.

Claims (1)

[Claims] 1. In a forced circulation lubrication system comprising means for supplying lubricating oil to sliding parts of mechanical members and means for returning the lubricating oil to the tank of the oil supply apparatus from which it was supplied, from the mechanical member to the oil supply apparatus. An oil supply device for rolling equipment, comprising: an oil return pipe for returning the lubricating oil; and a discharge device disposed in the middle of the oil return pipe for sucking the lubricating oil and delivering it to the tank.