JPH10220380A - Oil separation and recovery apparatus for oil cooled compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil separation and recovery apparatus for an oil cooled compressor which can dispense with an oil cooler. SOLUTION: An oil separation and recovery apparatus 1 for an oil cooled compressor has an inflow port 17 for compressed gas discharged together with oil from a compressor main body, a gas outflow port 19 for discharging the compressed gas separated from oil to the upper side, an oil reservoir 20 for storing the separated oil on the lower side, and an oil outflow port 17 for discharging the oil inside the oil reservoir 20. In such a device 1, a partition member 2 is arranged inside the oil reservoir 20 for varying flowing directions of the oil. Radiation fins 3 are arranged on an outer side of a wall of the oil reservoir 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil separation and recovery device for an oil-cooled compressor in which cooling oil is introduced into a gas compression space in a compressor body.

[0002]

2. Description of the Related Art Conventionally, an oil-cooled compressor shown in FIGS. The compressor includes a suction passage 11, a compressor main body 12 connected thereto, a discharge passage 1 extending to a discharge side of the compressor main body 12, and an oil separation / recovery unit 13 interposed therebetween.
4a, 14b, and an oil supply passage 16 extending from the lower part of the oil separation and recovery unit 13 to the gas compression space in the compressor main body 12 through the oil cooler 15 and the oil injection part such as a bearing and a shaft seal part. I have. The oil separation / recovery unit 13 has an inlet 17 for compressed gas discharged with oil from the compressor main body 12 and a gas outlet at the top of which compressed gas separated from oil flows out through the oil separation element 18. 19, an oil sump 20 for accumulating oil separated at a lower portion, and an oil outlet 21 for allowing oil in the oil sump 20 to flow out.

Then, the compressor main body 12
Is compressed while receiving oil injection from the oil supply passage 16 and is discharged to the discharge passage 14a with the oil. Further, the discharged compressed gas is guided to the oil separation / recovery unit 13 through the inlet 17 together with the oil, the oil and the compressed gas are separated by the oil separation element 18, and the clean compressed gas is discharged from the gas outlet 19 through the discharge passage 14 b. Will be sent to On the other hand, the oil is temporarily stored in the oil sump 20 and flows out of the oil outlet 21 into the oil supply passage 16. Then, this oil is cooled by the oil cooler 15 and sent to the above-described oil injection section, and then guided to the discharge port of the compressor body 12, and thereafter, the same circulation as above is repeated.

[0004]

The conventional oil separator / collector 18 is simply formed as a container as shown in the drawing, and has no obstruction inside, and has a flat surface with no irregularities. Is formed. Similarly, the outer surface is formed of a flat surface without any irregularities. For this reason, the oil in the oil separation and recovery unit 18 reaches the oil outlet 21 almost at the shortest distance,
The oil reaches the oil outlet 21 without much heat being taken from the wall of the oil reservoir 20. Therefore, there is a problem that the cooling efficiency of the oil reservoir 20 with respect to oil is poor, the load on the oil cooler 15 increases, and a large oil cooler 15 is required. On the other hand, the volume occupied by the oil cooler 15 in the entire compressor is large, and oil leakage in the connection pipe is likely to occur, which often causes troubles. Therefore, a structure without the oil cooler 15 is desired. . SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and has been made to meet the above-mentioned demands. An object of the present invention is to provide an oil separation and recovery device of an oil-cooled compressor which can eliminate an oil cooler. Is what you do.

[0005]

In order to solve the above-mentioned problems, a first aspect of the present invention is directed to a first aspect of the present invention, wherein an inlet of a compressed gas discharged with oil from a compressor body and a compressed gas separated from the oil are provided at an upper portion. The oil separation and recovery device of an oil-cooled compressor having an outflow gas outlet, an oil reservoir at the lower portion for storing the separated oil, and an oil outlet for discharging the oil from the oil reservoir. A partition member for changing the flow direction is provided in the oil reservoir, and a radiating fin is provided outside the wall of the oil reservoir.

According to a second aspect of the present invention, a fin is provided on the inner surface of the wall of the oil reservoir.

Further, according to a third aspect of the present invention, a flow path is provided between the partition member and the oil outlet, the flow path having an uneven surface formed on the opposite surface.

Further, a fourth aspect of the present invention provides an inlet for a compressed gas discharged together with oil from a compressor body, a gas outlet for discharging a compressed gas separated from oil from an upper portion, and a gas outlet for separating a lower portion. The oil accumulated in the oil sump is turned in a zigzag manner in an oil separation and recovery device of an oil-cooled compressor having an oil sump for accumulating accumulated oil and an oil outlet for discharging the oil in the oil sump. Then, a partitioning member was formed to form a groove-shaped flow path leading to the oil outlet.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 and 2 show a first embodiment of the first invention.
11 and 12 show an oil separation and recovery device 1 according to the embodiment.
Is substantially the same as the oil separation and recovery device 13 shown in FIG. 1 except that a partition member 2 is provided inside and a fin 3 is provided outside, and other configurations of the compressor are also shown in FIGS. 11 and 12 are substantially the same,
The parts corresponding to each other are denoted by the same reference numerals and description thereof is omitted. The partition member 2 has a flat plate shape, and the oil in the oil reservoir 20 is filled with an oil outlet 21 as shown by an arrow in the figure.
The oil reservoir 20 is provided in the oil reservoir 20 so as to form a void in the oil reservoir 21 on the opposite side of the oil outlet 21, using the farthest part as a flow path. In the case where the partition member 2 is not provided, the oil existing at a position distant from the oil outlet 21, particularly the oil existing at the corner, stays almost without flowing, whereas the partition member 2 is removed. By providing the oil flow, the flow of the oil toward the oil outlet 21 is promoted without causing the accumulation of the oil even at a place away from the oil outlet 21. As a result, the amount of heat exchange of the oil, especially the amount of heat exchange at the corners increases.

The fins 3 are provided outside the wall of the oil reservoir 20 of the oil separation and recovery unit 1, and the heat transmitted from the oil in the oil reservoir 20 to the wall of the oil reservoir 20. Is dissipated through the fins 3. Therefore, in this oil separation and recovery device 1, the amount of heat exchange of the oil in the oil sump 20 is increased by the partition member 2, and the release of heat transmitted from the oil to the wall from the oil to the atmosphere is promoted by the fins 3. The cooling efficiency of the oil reservoir 20 with respect to oil is improved. As a result, although the oil cooler 15 is provided in FIG. 1, the oil cooler 15 can be omitted, and troubles due to oil leakage in the connection pipe to the oil cooler 15 are eliminated. It should be noted that even if the fins 2 are provided in the outer portion of the space filled with the compressed gas above the oil reservoir 20, the cooling effect on the oil hardly occurs.

FIG. 3 shows an oil separation / recovery device 1A according to a second embodiment of the first invention. The oil separation / recovery device 1 shown in FIGS. Except for the points provided, the other parts are substantially the same, and corresponding parts are denoted by the same reference numerals and description thereof is omitted. The partition member 2A is formed by bending a flat plate in a stepwise manner so that the oil flow path toward the oil outlet 21 from the gap formed at a location remote from the oil outlet 21 as the oil flow path becomes narrower at first. Shape. The partition member 2A increases the flow speed of the oil at the bottom of the oil reservoir 20, further promotes the heat exchange of the oil, and improves the cooling efficiency for the oil.

FIG. 4 shows an oil separation / recovery unit 1B according to a third embodiment of the first invention. The oil separation / recovery unit 1 shown in FIGS. Except for the points provided, the other parts are substantially the same, and corresponding parts are denoted by the same reference numerals and description thereof is omitted. The partition member 2B is provided by bending a flat plate into a U-shaped cross section and forming a tunnel together with the bottom surface of the oil separation and recovery unit 1B.
The cross-sectional area of the oil flow path toward 1 is reduced. As in the case of the second embodiment, the partition member 2B enables an increase in oil heat exchange amount and an improvement in cooling efficiency.

FIG. 5 shows an oil separation and recovery device 1C according to a fourth embodiment of the first invention. The oil separation and recovery device 1 shown in FIGS. Except for the point provided and the point where the oil outlet 21 is provided on the bottom surface of the oil separation and recovery unit 1C, the other parts are substantially the same, and the corresponding parts are denoted by the same reference numerals and description thereof is omitted. The partition member 2 </ b> C has a flat plate shape, and is arranged so as to form a gap as an oil flow path between both edges and the wall of the oil reservoir 20. The oil sump 2 located on both sides of the oil outlet 21 is formed by the partition member 2C.
It promotes the flow of the oil at the zero corners and increases the heat exchange amount of the oil.

FIG. 6 shows an oil separation and recovery unit 1D according to a fifth embodiment of the first invention, and an oil separation and recovery unit 1C shown in FIG.
Is substantially the same except that a partition member 2D is provided in place of the partition member 2C, and corresponding portions are denoted by the same reference numerals and description thereof is omitted. The partition member 2D is formed by bending a flat plate into a U-shaped cross section, and narrows the oil flow path between the partition member 2D reaching the oil outlet 21 and the wall of the oil separation and recovery unit 1C. It is arranged to do. The partition member 2D also opposes the inner surface and the bottom surface of the side wall of the oil separation and recovery device 1D, and increases the amount of heat exchange with the opposing wall surface. Also in these second to fifth embodiments, an oil cooler is not required in the oil supply passage due to an increase in the amount of heat exchange of the oil and an improvement in the cooling efficiency for the oil. The trouble caused by the trouble is also eliminated.

FIG. 7 shows an oil separation and recovery unit 1E according to the second invention.
The oil separation and recovery device 1C shown in FIG. 5 is substantially the same as the oil separation and recovery device 1C except that a fin 3a is provided on the bottom surface inside the oil separation and recovery device 1E. The same numbers are assigned and the description is omitted. FIG. 8 shows an oil separation and recovery device 1F according to the third invention, and is different from the oil separation and recovery device 1C shown in FIG. 5 in that a partition member 2F is used instead of the partition member 2C.
Are substantially the same except for the point that is provided and the point that the bottom surface inside the oil separation and recovery unit 1F is made uneven, and the parts corresponding to each other are denoted by the same reference numerals and description thereof is omitted. The partition member 2F is formed such that the surface facing the bottom surface of the uneven shape is similarly uneven. In the oil separation and recovery devices 1E and 1F, by providing the fins 3a, and by providing a flow path between the partition member 2F and the oil outlet 21 with an opposing surface having an uneven shape,
At the same time, the flow of oil is promoted, and at the same time, turbulence is generated in the flowing oil, thereby further increasing the heat exchange amount of the oil. With the configuration as in the second and third aspects of the present invention, the oil cooler becomes unnecessary as described above, and the above-mentioned trouble does not occur.

FIGS. 9 and 10 show an oil separation and recovery unit 1G according to the fourth invention. Portions common to the oil separation and recovery unit 1 shown in FIGS. I do. In the oil separation and recovery device 1G, the oil sump 20 is vertically divided into two parts at a position higher than the oil outlet 21 provided at the lower part, except for the opening 4 at the corner farthest from the oil outlet 21. The plate-like partition member 5 and the space between the partition member 5 and the bottom surface of the oil separation and recovery unit 1G are formed so as to form a groove-like flow path from the opening 4 to the oil outlet 21 in a zigzag manner. A partition member 6 is provided. And
By forming the groove-shaped flow path leading to the oil outlet 21 in this manner, the cross-sectional area of the flow path is narrowed, the flow velocity of the oil is increased, the heat exchange amount of the oil is increased, and the cooling of the oil is performed. By improving the efficiency, an oil cooler is not required, and the above-mentioned trouble is solved.

Preferably, the above-mentioned fins 3 are provided on the oil separation and recovery unit 1G, and the cooling efficiency for oil is further improved by doing so. Further, the present invention does not limit the positions of the gas outlet 19 and the oil outlet 21 to those of the above-described embodiments, and the gas outlet 1
9 may be provided on either the upper side surface or the upper surface of the oil separation and recovery device, and the oil outlet 21 may be provided on either the lower side surface or the bottom surface of the oil separation and recovery device.

[0018]

As is clear from the above description, according to the first aspect, the compressed gas discharged from the compressor main body together with the oil flows out, and the compressed gas separated from the oil flows out to the upper part. In the oil separation and recovery device of an oil-cooled compressor having a gas outlet, an oil reservoir at the bottom for storing oil separated therefrom, and an oil outlet for discharging the oil from the oil reservoir, oil A partition member for changing the direction is provided in the oil reservoir, and a radiating fin is provided outside the wall of the oil reservoir. For this reason, the cooling efficiency with respect to oil is improved by increasing the amount of heat exchange and the amount of heat radiation of the oil, the oil cooler can be eliminated from the oil supply passage, the compressor can be downsized, and the oil cooler can be used. This has the effect that it is possible to completely eliminate the occurrence of troubles caused by oil leaks in the connection pipes that occur when provided.

According to the second aspect of the present invention, the fin is provided on the inner surface of the wall of the oil reservoir. further,
According to the third invention, a flow path having an uneven surface is provided between the partition member and the oil outlet. For this reason, there is an effect that the effect of the first invention can be made more remarkable.

Further, according to the fourth invention, the inlet of the compressed gas discharged with oil from the compressor body, the gas outlet from which the compressed gas separated from the oil flows out at the upper part, and the gas outlet at the lower part. In an oil separation and recovery device of an oil-cooled compressor having an oil sump for storing the separated oil and an oil outlet for allowing the oil in the oil sump to flow out, the oil accumulated in the oil sump is zigzag. It is formed by providing a partition member that forms a groove-shaped flow path that changes direction and reaches the oil outlet. For this reason, the same effect as the first invention can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of an oil-cooled compressor using an oil separation and recovery device according to a first embodiment of the first invention.

FIG. 2 is a sectional view of an oil separation and recovery device of the compressor shown in FIG.

FIG. 3 is a sectional view of an oil separation and recovery device according to a second embodiment of the first invention.

FIG. 4 is a sectional view of an oil separation and recovery device according to a third embodiment of the first invention.

FIG. 5 is a sectional view of an oil separation and recovery device according to a fourth embodiment of the first invention.

FIG. 6 is a sectional view of an oil separation and recovery device according to a fifth embodiment of the first invention.

FIG. 7 is a sectional view of an oil separation and recovery device according to a second invention.

FIG. 8 is a sectional view of an oil separation and recovery device according to a third invention.

FIG. 9 is a sectional view of an oil separation and recovery device according to a fourth invention.

FIG. 10 is a sectional view taken along line XX of FIG. 9;

FIG. 11 is a diagram showing an overall configuration of an oil-cooled compressor using a conventional oil separation and recovery device.

FIG. 12 is a cross-sectional view of the oil separation and recovery device of the compressor shown in FIG.

[Explanation of symbols]

1,1A-1G Oil separation and recovery unit 2,2A-2G
Partition member 3, 3a Fin 5, 6 Partition member 12 Compressor main body 17 Inlet 19 Gas inlet 20 Oil reservoir 21 Oil outlet

Claims (4)

[Claims] 1. An inlet for a compressed gas discharged with oil from a compressor body, a gas outlet from which a compressed gas separated from the oil flows out at an upper part, and an oil for storing the separated oil at a lower part. In an oil separation and recovery device of an oil-cooled compressor having a sump and an oil outlet for allowing oil in the oil sump to flow out, a partition member for changing a flow direction of the oil is disposed in the oil sump. An oil separation and recovery device for an oil-cooled compressor, wherein a radiating fin is provided outside the wall of the oil reservoir. 2. The oil separation and recovery device for an oil-cooled compressor according to claim 1, wherein fins are provided on the inner surface of the wall of the oil reservoir. 3. The oil-cooled compressor according to claim 1, wherein a flow path having an uneven surface is provided between the partition member and the oil outlet. Oil separation and recovery unit. 4. An inlet for compressed gas discharged with oil from the compressor body, a gas outlet for discharging compressed gas separated from oil at an upper portion, and an oil for storing separated oil at a lower portion. In an oil separation and recovery device of an oil-cooled compressor having a reservoir and an oil outlet for allowing oil in the oil reservoir to flow out, the oil accumulated in the oil reservoir is turned in a zigzag shape and the oil flow is recovered. An oil separation and recovery device for an oil-cooled compressor, comprising a partition member for forming a groove-shaped flow path leading to an outlet.