JP5439166B2 - Apparatus and method for removing foreign matter in oil - Google Patents

Description

  The present invention relates to a foreign matter removing apparatus and method for removing foreign matter, moisture and the like in lubricating oil.

  Conventionally, lubricating oil has been used in hydraulic control devices, pumps, engines, pistons, bearings, valves and the like. The lubricating oil contained in these products is circulated and reused, but by circulating the lubricating oil over a long period of time, solids such as metal powder mixed in the lubricating oil when used, Water used for cooling is mixed and accumulated. Prevent the progress of equipment wear, lubricating oil circulation failure, deterioration of lubricating oil performance, lubricating oil deterioration, corrosion of equipment, etc., and maintain the quality and purity of the lubricating oil contained in these products. Is important in maintaining the durability of the equipment.

  In order to maintain the quality and purity of the lubricating oil, conventional methods for removing the solid matter mixed in the lubricating oil include, for example, a stationary method and a filtration method. In addition, as a method of removing moisture mixed in the lubricating oil, for example, a stationary method using a specific gravity difference between oil and moisture, a centrifugal separation method, a superheating method, a voltage application method, a method of absorbing in a water absorbing material, and an adsorbing material There are filtration methods.

  Further, as a method of removing solids in the lubricating oil and removing moisture in the oil, for example, the lubricating oil containing solids and moisture is separated into oil and water using a centrifugal separation process, an oil / water separation tank or a gravity settling tank. There is a method of removing a part of solids and moisture by performing treatment with a hydrophobic hollow fiber membrane element after removing a part of solids and moisture by performing the treatment. Large solids such as metal scrap are separated by centrifugal separation, oil / water separation tank or oil / water separation process using gravity sedimentation tank, and small solids such as metal powder are hydrophobic hollow fiber membranes. While separating by the element, the emulsified water is separated by the hydrophobic hollow fiber membrane element to remove the water (see, for example, Patent Document 1).

JP-A-2005-904

  However, the separation with the conventional hydrophobic hollow fiber membrane element is often used even when the water removal performance of the filter is lowered, so that there is a problem that the water in the oil cannot be removed stably. is there.

  In view of the above problems, an object of the present invention is to provide a foreign matter removing apparatus and method capable of continuously and stably removing moisture in a lubricating oil.

The first invention of the present invention for solving the above-described problem is an oil containing moisture in both an inner cylinder and an outer cylinder, and an inner cylinder and an outer cylinder filled with a predetermined amount of oil containing moisture. Supply and discharge passages for supplying and discharging, rotating means for rotating the inner cylinder and the outer cylinder integrally, discharging means provided inside the inner cylinder for discharging oil in the absence of moisture, and A discharge unit that is provided in the outer cylinder and discharges oil having a high water content; and the inner cylinder includes a fixed cylinder having a slit hole, and a slide having a slit hole at the same position as the slit hole. The apparatus for removing foreign matter in oil has a two-layer structure with a cylinder, and when the slide cylinder is slid in the axial direction, the slit hole matches and the outer cylinder and the inner cylinder communicate with each other. .

According to a second aspect of the present invention, in the method for removing oil containing water using the apparatus for removing foreign matter in oil according to the first aspect of the invention, the sliding cylinder of the inner cylinder is moved to open the slit hole, and the inner cylinder The inside and outer cylinders are filled with a predetermined amount of oil containing moisture, the inner cylinder and the outer cylinder are integrally rotated by a rotating means, and moisture is transferred from the inner cylinder to the outer cylinder by centrifugal force. Then, the slide cylinder is moved, the slit hole is closed, and then the oil having a high water content is discharged from the outer cylinder to the outside.

3rd invention supplies and discharges oil containing moisture to the inner cylinder which fills oil containing moisture with a predetermined amount, an outer cylinder provided with a predetermined interval around the inner cylinder, and inside the inner cylinder A supply passage and a discharge passage; a rotating means for rotating the inner cylinder; a discharging means provided inside the inner cylinder for discharging oil in a state free from moisture; and provided in the outer cylinder, and having a moisture content. A discharge means for discharging a large amount of oil, and the inner cylinder has a two-layer structure of a fixed cylinder having a slit hole and a slide cylinder having a slit hole at the same position as the slit hole. When the slide cylinder is slid, the foreign matter removing apparatus in oil is characterized in that the slit hole matches and the outer cylinder and the inner cylinder communicate with each other.

  According to a fourth aspect of the present invention, in the method for removing oil containing moisture using the foreign matter removing apparatus for oil according to the third aspect of the invention, the sliding cylinder of the inner cylinder is moved to close the slit hole, and the inner cylinder The inside is filled with a predetermined amount of oil containing moisture, the inner cylinder is rotated by the rotating means, the moisture is transferred to the vicinity of the inner wall surface of the inner cylinder, the slide cylinder is moved thereafter, the slit hole is opened, and the moisture is An oil foreign matter removal method for removing moisture from oil characterized by discharging oil having a high content to the outer cylinder side.

  According to a fifth aspect of the present invention, in the first aspect of the invention, there is provided an apparatus for removing foreign matter in oil, comprising a moisture adsorption filter and a magnet inside the outer cylinder.

  According to a sixth aspect of the present invention, in the second or fourth aspect of the invention, there is provided a method for removing foreign matter in oil, wherein the oil from which water has been removed is frozen, and the remaining water is freeze-removed.

  According to the foreign matter removing apparatus for oil according to the present invention, foreign matter such as moisture in oil can be efficiently separated, and foreign matter containing moisture can be stably removed from the oil.

FIG. 1 is a schematic diagram of a foreign matter removing apparatus according to a first embodiment. FIG. 2 is a schematic diagram showing how moisture is separated and removed from oil. FIG. 3 is a schematic cross-sectional view of the foreign matter removing apparatus according to the first embodiment. FIG. 4 is a schematic cross-sectional view of another apparatus for removing foreign matter in oil according to the first embodiment. FIG. 5 is a schematic diagram of another method for removing foreign matter in oil according to the first embodiment. FIG. 6 is a schematic view of the foreign matter removing apparatus according to the second embodiment. FIG. 7 is a schematic diagram showing how water is separated and removed from oil. FIG. 8 is a schematic cross-sectional view of the foreign matter removing apparatus according to the second embodiment.

  Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

DESCRIPTION OF EMBODIMENTS A foreign matter removing apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of a device for removing foreign matter in oil according to the present embodiment. FIG. 2 is a schematic diagram showing how moisture is separated and removed from oil. FIG. 3 is a schematic cross-sectional view of the foreign matter removing apparatus according to the first embodiment, showing a state where the slit hole is open and a state where the slit hole is closed.
As shown in FIGS. 1 to 3, the foreign matter removing apparatus 10 </ b> A according to the present embodiment includes an inner cylinder 12, an outer cylinder 13, an inner cylinder 12, and an outer cylinder that are filled with a predetermined amount of oil 11 containing moisture W. 13 includes a supply passage 15 and a discharge passage 16 for supplying and discharging the oil 11 containing moisture W therein, and rotating means (not shown) for rotating the inner cylinder 12 and the outer cylinder 13 together. In addition, the inner cylinder 12 has a two-layer structure of a fixed cylinder 12a having a slit hole 14a and a slide cylinder 12b having a slit hole 14b at the same position as the slit hole 14a, and the slide cylinder 12b in the axial direction. When the slid is slid, the slit holes 14a and 14b are matched to allow the outer cylinder 13 and the inner cylinder 12 to communicate with each other.

A method for removing water-containing oil using such a foreign matter removing apparatus in oil will be described.
FIG. 2 shows how moisture is separated and removed from the oil.
1) As shown in FIGS. 1 to 3, first, the slide cylinder 12b of the inner cylinder 12 is moved to open the slit holes 14a and 14b (the upper stage in FIG. 3). The oil 11 can communicate freely with the inside of the cylinder 13.
2) In such a state, a predetermined amount of oil 11 containing water W is filled from the supply passage 15 into the inner cylinder 12 and the outer cylinder 13.
3) Thereafter, the inner cylinder 12 is rotated integrally with the outer cylinder 13 by a rotating means (not shown), and the moisture W is transferred from the inner cylinder 12 to the outer cylinder 13 by centrifugal force (the upper stage in FIG. 2). .
When rotated a predetermined number of times and for a predetermined time, the vicinity of the wall surface of the outer cylinder 13 is in a state where there is a lot of moisture W (state in the middle in FIG. 2).
The rotation by the rotating means is preferably between 2000 and 6000 rpm, and may be appropriately changed depending on the type of oil.
4) Then, the slide cylinder 12b is moved, the slit holes 14a and 14b are closed (lower stage in FIG. 3), and the communication state between the inner cylinder 12 and the outer cylinder 13 is stopped. As a result, the inside of the inner cylinder 12 has the oil 11A in a state where there is no water W, whereas the inside of the outer cylinder 13 contains the oil 11B in the state where there is a lot of water W, and both are separated. (The state in the lower part of FIG. 2).
5) Next, the drain plug 18 provided in the outer cylinder 13 with the oil 11B having a high moisture W content is opened and discharged to the outside.

  Thus, only the oil 11A from which the moisture W has been removed remains in the inner cylinder 12, and the oil 11A from which the moisture has been removed can be discharged from the discharge passage 16 to the outside and used. .

FIG. 4 is a schematic cross-sectional view of another apparatus for removing foreign matter in oil according to the first embodiment.
As shown in FIG. 4, a moisture adsorption filter 50 and a magnet 51 are provided on the inner surface of the outer cylinder 13.
When the moisture W moves, the moisture adsorption filter 50 adsorbs moisture also inside.
Further, by providing the magnet 51, it is possible to remove deterioration factors such as metal powder existing in the oil.

FIG. 5 is a schematic diagram of another method for removing foreign matter in oil according to the first embodiment.
As shown in FIG. 5, in the foreign matter removing apparatus 10 </ b> A of Example 1, the oil 11 </ b> A from which the water W has been removed from the oil is frozen by the freezing means 60, and then the remaining water W is frozen. The oil 11C after the freezing process from which the moisture W is further removed is obtained.
As a result, it is possible to further remove fine water from the oil 11A from which the water W has been removed by the foreign matter removing apparatus 10A, and it can be used as oil used in a precision machine.

DESCRIPTION OF EMBODIMENTS A foreign matter removing apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 6 is a schematic diagram of the apparatus for removing foreign matter in oil according to the present embodiment. FIG. 7 is a schematic diagram showing how water is separated and removed from oil. FIG. 8 is a schematic cross-sectional view of the foreign matter removing apparatus according to the first embodiment, showing a state where the slit hole is open and a state where the slit hole is closed.
As shown in FIGS. 6 to 8, the foreign matter removing apparatus 10 </ b> B according to the present embodiment has an inner cylinder 12 filled with a predetermined amount of oil 11 containing water W and a predetermined interval around the inner cylinder 12. The outer cylinder 13 provided, the supply passage 15 and the discharge passage 16 for supplying and discharging the oil 11 containing the water W in the inner cylinder 12, and a rotating means for rotating the inner cylinder 12, and the inner cylinder 12 has a two-layer structure of a fixed cylinder 12a having a slit hole 14a and a slide cylinder 12b having a slit hole 14b at the same position as the slit hole 14a, and when sliding the slide cylinder 12b in the axial direction, The slit holes 14a and 14b are matched and the outer cylinder 13 and the inner cylinder 12 are communicated with each other.

  A method for removing water-containing oil using such a foreign matter removing apparatus in oil will be described.

1) As shown in FIGS. 7 and 8, the slide cylinder 12b of the inner cylinder 12 is moved to close the slit holes 14a and 14b.
2) A predetermined amount of oil 11 containing water W is filled in the inner cylinder 12 through the supply passage 15.
3) Only the inner cylinder 12 is rotated by the rotating means, and the moisture W is transferred toward the vicinity of the wall surface inside the inner cylinder 12 (upper stage in FIG. 7).
4) As the rotation continues, moisture W concentrates in the vicinity of the wall surface inside the inner cylinder 12 (the middle stage in FIG. 7; the upper stage in FIG. 8).
5) After that, while the inner cylinder 12 is rotating, the slide cylinder 12b is moved to slightly open the slit holes 14a and 14b (state in the lower stage in FIG. 7).
6) Oil 11B having a high water content W is discharged from the opened slit holes 14a and 14b into the outer cylinder 13 (lower state in FIG. 7; lower state in FIG. 8).
Thus, only the oil 11A from which moisture has been removed remains in the inner cylinder 12, and the oil 11A from which moisture has been removed can be discharged from the discharge passage 16 to the outside and used.

  The above is a description of an apparatus for removing foreign matter in oil according to the present invention, for example, an apparatus for measuring moisture in lubricating oil. However, the present invention is not limited to this, and the present invention is not limited to this. The same can be applied to a device for analyzing moisture.

  As described above, the foreign matter removing apparatus for oil according to the present invention can stably remove foreign matters such as moisture in the lubricating oil.

10A, 10B Oil foreign matter removing device 11 Oil 11A Oil without moisture W 11B Oil with much moisture W 11C Oil after freezing treatment 12 Inner cylinder 13 Outer cylinder 14a, 14b Slit hole 15 Supply passage 16 Discharge passage

Claims (6)

An inner cylinder and an outer cylinder filled with a predetermined amount of oil containing moisture,
A supply passage and a discharge passage for supplying and discharging oil containing water in both the inner cylinder and the outer cylinder;
A rotating means for rotating the inner cylinder and the outer cylinder integrally ;
A discharge means provided inside the inner cylinder for discharging oil in a state free from moisture;
A discharge means for discharging oil having a high moisture content provided in the outer cylinder ;
The inner cylinder has a two-layer structure of a fixed cylinder having a slit hole and a slide cylinder having a slit hole at the same position as the slit hole. When the slide cylinder is slid in the axial direction, the slit hole is aligned. An apparatus for removing foreign matter in oil, wherein the outer cylinder and the inner cylinder communicate with each other. In the method for removing oil containing water using the foreign matter removing apparatus in oil according to claim 1,
Move the slide cylinder of the inner cylinder to make the slit hole open, and fill both the inner cylinder and the outer cylinder with a predetermined amount of oil containing moisture,
The inner cylinder and the outer cylinder are integrally rotated by a rotating means, moisture is transferred from the inner cylinder to the outer cylinder by centrifugal force, and then the slide cylinder is moved to close the slit hole,
Next, a method for removing foreign matter in oil that removes moisture from the oil, wherein oil having a high moisture content is discharged from the outer cylinder to the outside. An inner cylinder filled with a predetermined amount of oil containing moisture, an outer cylinder provided with a predetermined interval around the inner cylinder,
A supply passage and a discharge passage for supplying and discharging oil containing water into the inner cylinder;
Rotating means for rotating the inner cylinder ;
A discharge means provided inside the inner cylinder for discharging oil in a state free from moisture;
A discharge means for discharging oil having a high moisture content provided in the outer cylinder ;
The inner cylinder has a two-layer structure of a fixed cylinder having a slit hole and a slide cylinder having a slit hole at the same position as the slit hole. When the slide cylinder is slid in the axial direction, the slit hole is aligned. An apparatus for removing foreign matter in oil, wherein the outer cylinder and the inner cylinder communicate with each other. In the method for removing oil containing moisture using the foreign matter removing apparatus for oil according to claim 3,
Move the slide cylinder of the inner cylinder to close the slit hole, and fill the inner cylinder with a predetermined amount of oil containing moisture,
The inner cylinder is rotated by the rotating means, moisture is transferred to the vicinity of the wall surface inside the inner cylinder, and then the slide cylinder is moved to open the slit hole,
A method for removing foreign matter in oil that removes moisture from oil, wherein oil having a high water content is discharged to the outer cylinder side. In claim 1,
An apparatus for removing foreign matter in oil, comprising a moisture adsorption filter and a magnet inside the outer cylinder. In claim 2 or 4,
A method for removing foreign matter in oil, wherein the oil from which moisture has been removed is frozen, and the remaining moisture is frozen and removed.

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