JP3625399B2 - Oil separator / collector for oil-cooled compressor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil separator / collector of an oil-cooled compressor that separates compressed gas and oil.
[0002]
[Prior art]
Conventionally, as shown in FIG. 4, an oil separation and recovery unit 10 of an oil-cooled compressor is known. This oil-cooled compressor includes a compressor main body 11, a suction flow path 12 connected to one side thereof, a discharge flow path 13 connected to the other side with an oil separation / recovery unit 10 interposed therebetween, and an oil separation / recovery unit 10 And an oil supply channel 14 extending from the lower part of the nozzle. The oil separator / recovery unit 10 has an oil reservoir 21 at the lower part on the inner side, has a gas / oil inlet 22 and a gas outlet 23 above the oil reservoir 21, and opens to the oil reservoir 21. It consists of a container 25 having an oil outlet 24 and an oil separation element 26 attached to the lower part of the gas outlet 23. One end of the oil supply channel 14 opens into the oil reservoir 21, and the other end communicates with a rotor chamber (not shown) in the compressor body 11, that is, an oil supply location such as a gas compression space portion and a bearing / shaft seal portion. The oil cooler 27 and the oil filter 28 are provided.
[0003]
Then, the gas sucked from the suction passage 12 is compressed in the compressor main body 11 under the condition that oil is supplied from the oil supply passage 14, and the compressed gas accompanied by the oil mist passes through the bearing / shaft seal portion. It is led to the oil separator / collector 10 together with the oil that has been removed. In the oil separator / recovery unit 10, the compressed gas and oil are separated from the gas / oil inlet 22 to the oil separator 26, and in the process of passing through the oil separator 26, the clean compressed gas is discharged from the gas outlet 23. The oil that has been sent to the flow path 13 and separated is temporarily stored in the oil reservoir 21. Further, the oil in the oil reservoir 21 is sent to the oil supply location via the oil cooler 27 and the oil filter 28, and then led to the oil separation / recovery device 10 through the discharge port of the compressor body 11. Used for recycling.
[0004]
[Problems to be solved by the invention]
In the oil separation / recovery unit 10 of the conventional oil-cooled compressor described above, the gas / oil inlet 22 and the gas outlet 23 are provided in order to promote oil separation from the compressed gas and to send the compressed gas as clean as possible. It is preferable to be provided at a position away from the oil reservoir 21, and provided at the upper part of the oil separator / recovery unit 10. On the other hand, the oil separation element 26 is preferably provided near the gas outlet 23 and is attached to the inner peripheral surface of the upper portion of the container 25 surrounding the gas outlet 23.
[0005]
However, when the container 25 has a vertically long shape, the gas / oil inlet 22 and the oil separation element 26 have to be close to each other. For this reason, the compressed gas and the oil accompanying the compressed gas flowing in from the gas / oil inlet 22 directly collide with the oil separation element 26 while maintaining a high flow velocity. There is not enough separation. Moreover, since the compressed gas and oil collide with a very narrow range of the oil separation element 26, only a part of the oil separation element 26 can be used, and the performance cannot be fully exhibited. Therefore, the oil separator / collector 10 has a problem that the oil separation efficiency and durability are poor.
[0006]
By the way, zinc is often used for iron parts such as piping parts for rust prevention. Also, copper parts may be used instead of iron parts. On the other hand, in addition to acid gases such as sulfuric acid gas (SOx) and nitric acid gas (NOx), the gas, for example, air often contains moisture. For this reason, the water which precipitates from compressed gas reacts with the said sulfuric acid gas, nitric acid gas, etc., turns into an acidic liquid, and this acidic liquid reacts with the zinc and copper mentioned above, and a metal salt arises. The metal salt accumulates in the oil separation element 26 and causes the oil separation element 26 to be clogged. As a result, the compressed gas cannot pass through the clogged portion, and the flow velocity of the compressed gas passing through other portions is increased. In the case of the oil separator / recovery unit 10, as described above, the oil separation element 26 is used only locally, and in addition to this, a portion where oil is separated due to clogging is narrowed, so that the oil separation efficiency and durability are further improved. There is a problem that the decline is inevitable. When the durability of the oil separation element 26 is lowered, the frequency of replacement of the oil separation element 26 is increased, and there is a problem that maintenance work is increased accordingly.
An object of the present invention is to eliminate such conventional problems, and to provide an oil separation and recovery device for an oil-cooled compressor capable of improving oil separation efficiency and durability and reducing labor for maintenance. It is something to be offered.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the first invention has an oil reservoir in the lower part on the inside, a gas / oil inlet and a gas outlet above the oil reservoir, and the oil reservoir In an oil separation / recovery unit of an oil-cooled compressor, comprising: a container having an open oil outlet; and an oil separation element having a bottom surface covered with a member that does not allow fluid to pass through and attached to a lower portion of the gas outlet. A cylindrical current flow that is interposed between the gas / oil inlet and the oil separation element, surrounds the side of the oil separation element, and forms a space that guides fluid from below to the side of the oil separation element. member is provided, the outer peripheral portion of the bottom surface and / or the oil separator elements of the current transformer member, there is a breathable, each diameter larger than the pores of the large number of fine fluid passage channel in the oil separator element or It was formed of a metal salt capture member having a fluid passage channel consisting viewed eyes.
[0008]
Further, in the second invention, in addition to the configuration of the first invention , a rectifying member having air permeability is provided between the metal salt trapping member on the bottom surface of the current transformation member and the fluid working space around the oil separation element. An intervening configuration was adopted .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
Figure 1 shows an oil-cooled compressor of the oil separating and recovering apparatus 1 B according to the first invention, the parts in common with the oil separator recovery unit 10 described above is omitted with denoted by the same number to each other.
The oil separating and collecting device 1 B, a gas and oil inlet 22 at the top side, and having an oil outlet 24 to the gas outlet 23 and the bottom surface to the top surface, a cylindrical oil separator element in the lower part of the gas outlet 23 26. The bottom surface of the oil separation element 26 is covered with a metal plate 2 that does not allow fluid to pass through. That is, the fluid can only flow from the outer peripheral surface of the side portion of the oil separation element 26 toward the inner peripheral surface. Further, a cylindrical current-transforming member 3 is provided between the gas / oil inlet 22 and the oil separation element 26 so as to surround the side of the oil separation element 26, and below the oil separation element 26. A space 4 is formed to guide the fluid from one side to the other.
[0010]
Then, such a current-transforming member 3 does not cause the compressed gas having a high flow velocity from the gas / oil inlet 22 and the oil accompanying the gas to directly collide with the oil separation element 26, and once turn downward, Is turned upward to reach the side surface of the oil separation element 26. Moreover, compressed gas and oil come to flow uniformly into the entire side surface portion. As a result, the oil separation efficiency is improved, and the oil separation element 26 contributes to the oil separation uniformly as a whole. Therefore, there is no local concentrated use, the life is prolonged, the replacement frequency is reduced, and the maintenance work is reduced. Is also reduced.
[0011]
Further, in this oil separator / recovery unit 1B, the bottom surface of the current transformation member 3 is formed by a breathable metal salt capturing member 5A.
[0012]
With such a configuration, even when a metal salt is generated due to sulfuric acid gas, nitric acid gas and moisture-containing compressed gas, the metal salt is removed by the metal salt capturing member 5A, and the metal salt in the oil separation element 26 is removed. Accumulation and clogging are suppressed, good oil separation efficiency is maintained, its life is extended, and maintenance work is further reduced.
[0013]
The metal salt trapping member 5A is made of, for example, a porous material having a large number of pores or a mesh material having a large number of fine stitches. It is configured to be larger than the diameters of the various fluid passage channels. Thus, by making the fluid passage channel in the metal salt trapping member 5A larger than that of the oil separation element 26, the oil trapping rate in the metal salt trapping member 5 is reduced, and the metal salt is trapped efficiently. become. As a result, in the oil separation element 26, oil is captured more preferentially than the metal salt, clogging by the metal salt is reduced, and good oil separation efficiency is maintained for a long time.
The metal salt capturing member 5A is not limited to the one that captures only the metal salt.
[0014]
FIG. 2 shows an oil separation / recovery unit 1C of an oil-cooled compressor according to a second embodiment of the first invention, and parts common to the oil separation / recovery unit described above are denoted by the same reference numerals and described. Omitted.
In this oil separator / collector 1 </ b> C, a cylindrical metal salt capturing member 5 </ b> B is also disposed on the outer periphery of the oil separator 26.
Further, clogging due to metal salts is further suppressed, and good oil separation efficiency can be maintained for a long time.
The material of the metal salt capturing member 5B is the same as that of the metal salt capturing member 5A.
[0015]
In addition, in the metal salt capturing members 5A and 5B , in the direction in which the airflow passes, by configuring the mesh material and the porous material of the portion located on the upstream side to be rough, the metal salt having a large diameter on the upstream side, It can be efficiently captured step by step like a small-diameter metal salt on the downstream side. Specifically, according to the tests and the like conducted by the inventors of the present application, the metal salt capturing member 5A has a mesh material with a porosity of about 98%, and the metal salt capturing member 5B has an outer peripheral side and an inner peripheral side, respectively. good results constitute Rume Mesh material such from diameter 1.0 .mu.m, 0.5 [mu] m glass wool was obtained.
[0016]
Figure 3 shows a second shot oil separator collector 1D oil-cooled compressor according to the bright, the portions common to the above-mentioned oil separator collector will be omitted with denoted by the same number to each other.
In this oil separator / collector 1D, a breathable rectifying member 6 is interposed between the metal salt trapping member 5A and the fluid flow space around the oil separation element 26. The rectifying member 6 is made of, for example, a porous material having a large number of pores, a mesh material having a large number of fine stitches, or a donut-shaped plate having a single hole formed at the center.
With this configuration, in this oil separator / recovery unit 1D, the compressed gas and the oil pass through the metal salt capturing member 5A and the rectifying member 6 so that the flow direction is adjusted, and the oil separation element 26 is uniformly distributed on the outer peripheral portion. The oil separation element 26 is further promoted to achieve uniform oil separation.
[0017]
【The invention's effect】
As is clear from the above description, according to the first invention, an oil-cooled compressor including an oil reservoir, a gas / oil inlet, a gas outlet and a container having an oil outlet and an oil separation element is provided. In the oil separator / collector, it is interposed between the gas / oil inlet and the oil separation element, and surrounds the side of the oil separation element to form a space that guides fluid from below to the side of the oil separation element. A cylindrical current-transforming member is provided , and the bottom surface of the current-transforming member and / or the outer peripheral portion of the oil separation element is air permeable, and each of the numerous fine fluid passage channels in the oil separation element is air permeable. The structure is formed by a metal salt capturing member having a fluid passage channel composed of pores or stitches larger than the diameter .
For this reason, clogging of the oil separation element by the metal salt is suppressed, the oil separation efficiency is improved, and the oil separation element contributes to the oil separation uniformly as a whole. As a result, the replacement frequency is reduced, and the maintenance work is reduced.
[0018]
Furthermore, according to the second invention, in addition to the configuration of the first invention, air flow is rectified between the metal salt trapping member on the bottom surface of the current transformation member and the fluid working space around the oil separation element. It is the structure which interposed the member.
For this reason, by reducing the compressed gas and drift, adjusting the flow direction and allowing the compressed gas and oil to reach the oil separation element uniformly, further uniform oil separation in the entire oil separation element is further promoted. The effects such as being done.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an oil separation and recovery device according to a first embodiment of the first invention.
FIG. 2 is a cross-sectional view of an oil separation and recovery device according to a second embodiment of the first invention.
FIG. 3 is a cross-sectional view of an oil separation and recovery device according to the second invention.
FIG. 4 is a diagram showing an overall configuration of an oil-cooled compressor using a conventional oil separator / collector.
[Explanation of symbols]
1A, 1B, 1C Oil separation / recovery device 2 Metal plate 3 Current transformation member 4 Space portion 5 Metal salt capturing member 6 Rectification member 10 Oil separation / recovery device 14 Oil supply passage 21 Oil reservoir 22 Gas / oil inlet 23 Gas flow Outlet 24 Oil outlet 25 Container 26 Oil separation element

Claims (2)

A container having an oil sump at the lower part inside, a gas / oil inlet and a gas outlet above the oil sump, and an oil outlet opening at the oil sump, and a bottom surface serving as a fluid In an oil separation and recovery unit of an oil-cooled compressor comprising an oil separation element that is covered with a member that does not pass through and is attached to the lower part of the gas outlet,
A cylindrical current flow that is interposed between the gas / oil inlet and the oil separation element, surrounds the side of the oil separation element, and forms a space that guides fluid from below to the side of the oil separation element. A member is provided , and the bottom surface of the current-transforming member and / or the outer peripheral portion of the oil separation element is air permeable and has pores larger than the respective diameters of a number of fine fluid passage channels in the oil separation element. An oil separator / collector for an oil-cooled compressor, characterized in that it is formed by a metal salt trapping member having a fluid passage channel comprising stitches . 2. The oil according to claim 1 , wherein a breathable rectifying member is interposed between the metal salt capturing member on the bottom surface of the current transformation member and the fluid working space around the oil separation element. Oil separator / collector for cold compressor.

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