JPS637084B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for purifying oil such as cutting oil and lubricating oil, and more particularly to an apparatus for removing foreign substances from oil using both electrophoresis and electrophoresis principles. .

Conventionally, magnetic adsorption methods, precipitation methods, filtration methods, or centrifugal separation methods have been used to remove foreign substances such as chips from cutting oils and lubricating oils, but these methods cannot sufficiently remove minute foreign substances. This is the actual situation.

SUMMARY OF THE INVENTION An object of the present invention is to provide an oil purification device that can remove minute foreign matter that cannot be removed by conventional means.

Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

A centrifugal separator 2 and a metal filter 3 are sequentially installed in the middle of the suction pipe of the pump P inserted into the storage tank 1, and the oil discharged from the pump P passes through the purification device 4 according to the present invention. It is designed to return to storage tank 1.

The oil tank 5 of the purifier 4 has a box shape made of welded stainless steel plates, and has an inlet 6 at the top of the front.
Outlet ports 7 are formed in the upper part of the rear surface, and the entire body is grounded.A partition plate 8 made of an insulating material is installed near the front of the interior with a flow gap 9 left at the lower end. The chamber at the front is a foreign matter separation device A that utilizes the principle of electrophoresis, and the rear chamber is a foreign matter filtering device B that utilizes the principle of electrophoresis.

The foreign matter separator A includes a comb-shaped positive electrode plate 10 in which a large number of stainless steel plates are arranged in parallel on the front side of a partition plate 8.
At the same time, a negative electrode plate 12 made of a stainless steel plate is diagonally installed at the front lower part of the oil tank 5 at a distance from the positive electrode plate 10, and a large number of rod-shaped permanent magnets 12 are placed on the back side of the negative electrode plate 12. The positive electrode plate 10 is connected to a DC high voltage source 13 and the negative electrode plate 11 is grounded via an oil tank 5.

The foreign matter filtering device B has a first positive electrode plate 14 made of stainless steel plate stretched on the rear surface of the partition plate 8, and a first negative electrode plate 15 and a second positive electrode plate 1 on the rear surface.
6 and a second negative electrode plate 17 are sequentially arranged at intervals, and the three spaces formed between each electrode plate are filled with a filter 18 made of densely compressed greife fiber. A flow gap 19 is formed at the lower end of the electrode plate 16.
The second positive electrode plates 14 and 16 are connected to the DC high voltage source 13 via a resistor 23, and the first and second negative electrode plates 15 and 17 are grounded via an oil tank 5.

In addition, at the rear of the oil tank 5, a flow gap 21 is provided at the lower end.
A partition plate 20 is arranged, and the partition plate 20
A float switch 22 is provided between the outlet port 7 and the outlet port 7, and is connected to the starting circuit of the DC high voltage source 13.

Next, the operation of this embodiment will be explained.

The oil sucked up from the storage tank 1 by the pump P passes through a centrifugal separator 2 and a metal filter 3, where relatively coarse foreign matter is removed, and the oil is supplied from the inlet 6 into the oil tank 5, and is then supplied to each electrode. When the plate reaches the level where it is immersed in oil, float switch 2
2, the DC high voltage source 13 is activated, and each positive electrode plate 10, 14, 16 and the corresponding negative electrode plate 1 are activated.
A high potential electric field is formed between 1, 15, and 17. Here, it is preferable that the voltage applied to the positive electrode plate 10 of the foreign matter separator A is 30,000 to 50,000 volts, and the voltage applied to the positive electrode plates 14 and 16 of the foreign matter filtration device is about 10,000 to 30,000 volts. be.

In the foreign matter separator A, the foreign matter mixed in the oil is separated from the positive electrode plate 10 and the negative electrode plate 11.
Due to the principle of electrophoresis caused by the action of a high-potential electric field formed during the process, foreign matter made of magnetic material such as iron powder is attracted to the negative electrode plate 11, separated from the oil, and attached to its surface. is permanent magnet 1
2 and adheres to the surface of the negative electrode plate 11.

The oil that has passed through the foreign matter separator A flows into the foreign matter filtration device B from the flow gap 9 at the lower end of the partition plate 8, and the oil flows into the foreign matter filtration device B through the flow gap 9 at the lower end of the partition plate 8. The oil flows into the foreign matter filtration device B through the flow gap 9 at the lower end of the partition plate 8, and the oil flows into the foreign matter filtration device B through the flow gap 9 at the lower end of the partition plate 8. Therefore, only the oil flows up and down between the electrode plates as shown by the arrows in the figure, and the foreign matter mixed in therein is filtered out by the filter 18 and removed, and the oil flows up and down between the electrode plates as shown by the arrows. The oil passing through the flow gap 21 at the lower end flows through the outlet 7
It overflows and is returned to the storage tank 1.

As specifically explained in the above embodiment,
The oil purification device of the present invention has a foreign matter separation device that utilizes the principle of electrophoresis, in which a pair of positive and negative electrode plates are arranged opposite to each other with a space between them, and foreign matter is attracted to the electrode plates by an electric field formed between them. A foreign matter filtration device is installed in the oil tank using an electric permeation principle, in which a filter is filled between a pair of positive and negative electrode plates that are spaced apart, and the electric field formed between the electrode plates causes oil to permeate into the filter and remove foreign matter. The main purpose of this system is to have a foreign matter separation device that uses the principle of electrophoresis and a foreign matter filtration device that uses the principle of electrophoresis pass through one after another, so that minute foreign matter can be reliably removed. In addition, it is possible to share a power source for applying a high voltage to the electrodes of both devices, which has the effect of simplifying the equipment.

[Brief explanation of the drawing]

The accompanying drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view with a block diagram, and FIG. 2 is a cross-sectional view taken along the line Y--Y in FIG. 1. 5: Oil tank, 10, 14, 16: Positive electrode plate, 1
1, 15, 17: negative electrode plate, 18: filter, 1
3: DC high voltage source, A: Foreign matter separation device using the principle of electrophoresis, B: Foreign matter filtering device using the principle of electrophoresis.

Claims (1)

[Claims] 1. A foreign matter separation device that utilizes the principle of electrophoresis, in which a pair of positive and negative electrode plates are arranged opposite to each other with a space between them, and foreign matter is attracted to the electrode plates by an electric field formed between them, and a pair of positive and negative electrode plates are arranged opposite to each other with a space between them. The oil tank is characterized by a foreign matter filtration device that utilizes the electric seepage principle, which removes foreign matter by filling a filter between the electrode plates and causing oil to permeate into the filter and remove foreign matter by an electric field formed between the electrode plates. Oil purification equipment.