JP3214887B2 - Water removal device for water in oil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing water in oil for removing water in oil. More specifically,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-in-oil water removal device capable of efficiently removing water from lubricating oil in which water in the air found in an oil-cooled compressor or the like is condensed and mixed.

[0002]

2. Description of the Related Art Generally, moisture in a lubricating oil causes various defects in the field of application to which the lubricating oil is applied. For example, in an oil-cooled compressor, moisture in the air is likely to condense and mix into the lubricating oil, and the mixed water reduces the lubricity of the oil and accelerates the deterioration of the oil. Rust is generated in the system. For this reason, conventionally, in order to remove moisture from the lubricating oil, measures have been taken such as frequent draining. However, the above-mentioned countermeasures such as draining are complicated and also have a poor water removal effect, so that failure of a lubricating oil system device cannot be prevented.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the prior art. The present invention can be generally used for the purpose of removing moisture in lubricating oil, but in particular, it is incorporated in a lubricating oil circuit such as a compressor to constantly remove moisture mixed in lubricating oil. It is an object of the present invention to provide a water-in-oil water removing device that can efficiently remove small amounts of water.

[0004]

SUMMARY OF THE INVENTION In summary of the present invention,
The present invention relates to a container body having an air vent hole at the center of the top lid and the bottom plate, and an oil inlet / outlet at the bottom and top of the side portion, and water-in-oil disposed between the air vent holes in the container body. In the water-in-oil water removal device comprising a water removal element, the water-in-oil water removal element is (i) a cylindrical body having an air flow passage communicating with an air vent hole in the container body at a central portion, (ii) the cylindrical body has a porous inner wall and a porous outer wall, and a space surrounded by upper and lower seals, and (iii) water-permeable and oil-impermeable to the space. The present invention relates to a water removal device for water in oil, comprising a thin film member. It goes without saying that the present invention is not limited to the illustrated one.

As described above, the water-in-oil-water removing apparatus of the present invention comprises two main components: a container body and a specially-structured water-in-oil water removing element provided in the container body. It consists of In particular, the present invention has a great feature in the latter moisture removing element. Further, the water removing element of the present invention uses a thin film that allows water molecules to pass therethrough but does not allow oil molecules to pass through in order to remove moisture in the lubricating oil. Is diffused and penetrated to the surface of the membrane in contact with the atmosphere, where it is brought into contact with air to evaporate water.

First, an element for removing water from oil-in-oil, which is a major feature of the present invention, will be described with reference to the drawings. FIG.
FIG. 1 is a perspective view of a water-in-oil water removing element (E) of the present invention. In FIG. 1, the water removing element (E)
Is cut out at the center to show its internal structure.

As shown in the drawing, the water removing element (E) of the present invention has (i) an air flow passage (15) communicating with an air vent hole (92, 102 in FIG. 2 described later) at the center of the container. (Ii) the cylindrical body (1) comprises a porous inner wall (11), a porous outer wall (12), and an upper seal portion (13).
And a space part (16) surrounded by the lower seal part (14), (i
ii) A water-permeable and oil-impermeable thin film (2) is provided in the space (16). In the present invention, the space (16) of the cylindrical body (1)
It is essential that a thin film body (2) is provided therein. However, this type of water-permeable and oil-impermeable thin film (2) usually has a thickness of several tens of μm (for example, 30 to 5 μm).
0 μm), an oil-permeable and air-permeable non-woven fabric (3, 31) may be provided before and after the thin film body (2) as shown in the figure. In FIG. 1, upper and lower seal portions (13, 14)
In order to fix the moisture removing element (E) to the container body (4) without oil leakage as described later,
(17) is installed.

In the present invention, as the water-permeable and oil-impermeable thin film (2), a polyvinyl alcohol film (PVA film), a cellophane (regenerated cellulose film) or the like may be used. These thin films (2)
Is usually 30 to 50 μm, and as described above, at least the side of the thin film body (2) that comes into contact with the lubricating oil, that is, the porous outer wall (12) in FIG. A non-woven fabric (3) is provided. In the present invention, as shown in the figure, an oil-permeable and gas-permeable nonwoven fabric is also provided on the side of the thin film body (2) which comes into contact with the atmosphere, that is, on the side of the porous inner wall (11) in FIG. (31) may be provided.

As the nonwoven fabric (3, 31), those made of synthetic resin or natural pulp are used. In addition, the nonwoven fabric (3) can filter relatively large dusts in oil simultaneously with the reinforcing function. For this reason, dust in the oil becomes thin film (2)
It is prevented from being deposited on the top, and the film function can be exhibited for a long time. On the other hand, the other nonwoven fabric (31) has a reinforcing function as its main role. The other nonwoven fabric (31) diffuses the moisture permeating the outer surface of the thin film body (2) into the nonwoven fabric, improves the contact efficiency with the atmosphere, and improves the surface of the thin film body (2). Needless to say, it is effective in evaporating and releasing moisture into the atmosphere at an early stage. In the present invention, the thin film member disposed in the space (16) of the cylindrical member (1) is used.
(2) and the non-woven fabric (3, 31) have the upper and lower seal portions (13, 1).
Needless to say, the lubricating oil is not leaked into the air flow passage (15).

Next, a water-in-oil water removing apparatus of the present invention utilizing the water removing element (E) will be described. FIG.
FIG. 1 is a sectional view of a water-in-oil water removing apparatus (A) of the present invention. As shown in the figure, the water-in-oil water removal device (A)
The container is roughly divided into two components, a container body (4) and the above-mentioned water removing element (E) disposed in the container body (4). FIG. 2 shows the container body.
The lower part of (4) shows an oil receiving container (10) and a float (F) system disposed in the oil receiving container (10), which is a container main body (4) as described later. It is used in the case of an oil spill accident inside the building.

The container body (4) comprises an upper lid (5) and a bottom plate (6).
, And an oil inlet (7) at the lower side and an oil outlet (8) at the upper side
It is a cylindrical container having. The upper cover (5) has an element receiving portion for fitting and fixing a tip portion of the moisture removing element (E), more specifically, an O-ring (17) at the tip portion (see FIG. 1) below the upper lid (5). (51) and an air vent hole (52) at the center thereof. The bottom plate (6) has an upper lid (5)
It has the same structure as that of the above, and an element receiving part (6) for fixing the lower end of the moisture removing element (E)
1) and an air vent hole (62) at the center thereof. The oil inlet (7) and the oil outlet (8) are connected in the lubricating oil circuit (see FIG. 3 described later) so that the lubricating oil flows in from the lower part of the container main body (4) and flows out from the upper part. Is provided on the side of the.

As described above, in the water removing element (E) of the present invention, when removing the water in the lubricating oil, the water in the lubricating oil is transmitted through the film by the thin film (2), and the element (E) is removed. E) is leached into the air flow passage (15) side at the center of (E), where it is used to evaporate by air flow. Therefore, in the water removing element (E), the air flow passage (15) at the center portion has the upper lid (5) and the bottom plate (6) of the container body (4).
Are connected to the air vent holes (52, 62) provided in the vehicle so as to secure a free air flow.

In the present invention, as shown in FIG. 2, a guide (9) may be provided in the container body (4). This is to bring the lubricating oil containing water flowing from the oil inlet (7) into efficient contact with the surface of the water removing element (E).
Under the illustrated guide (9), the lubricating oil is
The lubricant flows through the gap between (9) and the element (E), whereby the lubricating oil comes into efficient contact with the element (E).

The water-in-oil water removing apparatus (A) of the present invention basically comprises the container body (4) and the water removing element (E) disposed therein as described above. . When the device (A) is operated in such a configuration, the oil inlet
The lubricating oil flowing from (7) comes into contact with the moisture removal element (E), and the moisture in the lubricating oil permeates through the thin film body (2) to the atmosphere side, where the air in the air flow passage (15) Is evaporated and removed into the atmosphere by the flow. Air distribution may be forced using a fan or the like.However, if natural ventilation can be expected due to high oil temperature, ventilation by a fan is not necessary. That is not.

In the present invention, as shown in FIG.
It goes without saying that the water-in-oil water removal device (A) may be equipped with a safety device in the event of oil leakage consisting of a float (F) system. As described above, in the water-in-oil water removal apparatus (A) of the present invention, the water removal element (E) which plays a particularly important function, of which the thin film body (2) is extremely thin and is torn. It is preferable to take measures against damage. Next, this point will be described.
The safety measure at the time of oil leakage according to the present invention includes an oil receiving container (10) at a lower portion of the container main body (4) and a float (F) disposed in the oil receiving container (10).

As shown in FIG. 2, the oil receiving container (10) has an air vent hole formed in a bottom plate (6) of the container body (4).
This is a container that shares (61). In addition, a float support (101) for supporting a float (F) to be described later is provided below the lower part. Float disposed in the oil receiving container (10)
(F) has the following configuration. Float (F)
Is a float body (11), an air vent hole (61) fixed to the float body (11) and formed in a bottom plate (6) of the container body (4), and an air flow passage (15) in the center of the element (E). , And container body
(4) A float shaft (111) having a length that passes through the air vent hole (51) of the upper lid (5) is fixed to the float shaft (111), and when floating, the air vent hole (51) of the upper lid (5). And a lower plug (113) fixed to the float shaft (111) and closing the air vent (61) of the bottom plate (6) when floating.

In the event that the thin film member (2) is damaged and oil is leaked by the above-mentioned float (F) system, if the lubricating oil is damaged, the thin film member (2) and the air flow passage of the element (E) (1
5), it flows into the oil receiving container (10), and when the float (F) starts operating, the float (F) floats and the upper and lower stoppers (11)
2,113) completely closes the air vent holes (51, 61) of the container body (4), thereby preventing oil from leaking from the water-in-oil water removal device (A). In the present invention, the above two upper and lower stoppers
Of the (112,113), the closed area of the upper plug (112) is reduced by the lower plug (113).
If it is larger, stronger buoyancy acts on the upper plug (112), so that a strong sealing effect can be obtained.

[0018]

EXAMPLE The performance of the water-in-oil water removing apparatus (A) of the present invention was tested in the lubricating oil circuit shown in FIG. In FIG. 3, B is an oil tank, C is an oil heater, and P is a pump for oil circulation. The oil circulation system was closed to suppress evaporation of water from other than the water removal device (A).

The experimental conditions are as follows. Oil temperature 60 ° C Oil amount 5.5 l Lubricating oil amount 1.2 l / min Thin film body Polyethylene film, PVA film, cellophane Initial Water content: 5000 PPM treatment time (see Fig. 4)

FIG. 4 shows the experimental results. FIG. 4 shows the change over time in the water content of oil when various thin films were used. The thin film used in the experiment was a polyethylene film (high-pressure polyethylene, 30 μm in thickness), a PVA film (Nichigo Film Co., Ltd., # 2500, 25 μm in thickness),
Cellophane (manufactured by Nimura Chemical Industry Co., Ltd., PS-1, # 300,
(Thickness: 20 μm). In addition, a polyethylene film is a comparative example. As shown in the figure, it can be seen that the water-in-oil water removing apparatus (A) of the present invention is extremely effective.

[0021]

The water-in-oil water removing apparatus of the present invention utilizes a thin film that transmits water molecules but does not transmit oil molecules to allow water in oil to permeate into the atmosphere and utilize the air flow. The water in the lubricating oil is removed by a process of evaporating the water. In view of its evaporation characteristics, it is effective to use the water-in-oil moisture removing device of the present invention as a permanent installation type incorporated in a lubricating oil circuit, whereby a small amount of moisture mixed into oil is always used. The oil can be removed one by one to keep the oil in a favorable state at all times.

[Brief description of the drawings]

FIG. 1 is a perspective view of a water-in-oil moisture removing element of the present invention.

FIG. 2 is a sectional view of a water removal device for water in oil according to the present invention.

FIG. 3 is a configuration diagram of a lubricating oil circuit for evaluating the performance of the water-in-oil water removal apparatus of the present invention.

FIG. 4 is a graph showing the results of a water removal experiment using the water-in-oil water removal apparatus of the present invention.

[Explanation of symbols]

A ……………………………………………………………………………………………………………………………………………………………………………………………………….
… Float E …………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….
… Float body 1 ………… Cylinder 111
… Float axis 2 ………… Thin film 112…
… Top plug 3,31 …… Non-woven fabric 113…
… Bottom stopper 4 …………………………………………………………………………………………………………………………………………… ..
... oil tank 5 ... top cover C ...
… Oil heater 6 ………… Bottom plate P ………
Oil pump 7 Oil inlet 8 Oil outlet 9 Guide 10 Oil container

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B01D 61 / 36,63 / 14

Claims (9)

(57) [Claims] 1. A container body having an air vent hole at the center of the upper lid and the bottom plate, and an oil inlet / outlet at the bottom and upper side portions, and water-in-oil disposed within the container body between the air vent holes. A water removing device comprising: (i) a cylindrical body having an air flow passage in a center portion communicating with an air vent hole of the container body. (Ii) the cylindrical body has a porous inner wall and a porous outer wall, and a space surrounded by upper and lower seals; and (iii) the space is water-permeable and oil-impermeable. An apparatus for removing water in oil-in-water, comprising a thin film member of the formula (1). 2. A water-permeable and oil-impermeable thin film on the porous inner wall side and an oil-permeable non-woven fabric on the porous outer wall side in a space of the cylindrical body. 2. The water removal device for water-in-oil according to 1. 3. A water-permeable and oil-impermeable thin-film body which is formed by laminating oil-permeable and air-permeable nonwoven fabrics on both sides of a space of a cylindrical body. Water-in-oil water removal equipment. 4. The apparatus for removing water from oil-in-water according to any one of claims 1 to 3, wherein the thin film body and the nonwoven fabric are pleated. 5. The water-in-oil according to claim 1, wherein the upper and lower seal portions and the upper and lower ends of the thin film or the upper and lower ends of the thin film and the nonwoven fabric are sealed. Water removal device. 6. The apparatus for removing water from oil-in-oil according to claim 1, wherein an oil receiving container in the event of oil leakage is disposed below the container main body. 7. The apparatus for removing water from oil-in-water according to claim 6, wherein the oil receiving container shares an air vent hole in a bottom plate of the container body. 8. An oil receiving container, comprising: a float main body, a float shaft fixed to the float main body, and two air vent holes fixed to the float shaft and closing an air vent hole in an upper lid of the container body and an air vent hole in the bottom plate. 7. The apparatus for removing water from oil-in-water according to claim 6, further comprising a float comprising upper and lower stoppers. 9. The upper and lower stoppers fixed to the float shaft, wherein the upper stopper for closing the air vent hole of the upper lid has a larger closing area than the lower stopper for closing the air vent hole of the bottom plate. Water-in-oil water removal equipment.