JP2013173125A - Oil separator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil separator which can separate a substantial amount of oil through the whole structure of the separator.SOLUTION: An oil separator 3 causes oil-containing air flowing into an enclosure 11 to collide with collision plates 34 and 35, thereby separating oil away from air to recover the separated oil. The oil separator 3 is composed of the collision plates 34 and 35 and spaces, and has expansion chambers 31 and 32 having a sectional area that is larger than that of an inlet 14. Each of the expansion chambers 31 and 32 has at least two collision plates 34 and 35 opposite to each other. The collision plates 34 and 35 are provided with buffle plates 34b and 35b projecting toward the opposed collision plates 34 and 35 so as to serve as obstacles to channels.

Description

  The present invention relates to an oil separator that separates oil contained in air that has passed through an apparatus.

  Vehicles such as trucks, buses and construction machinery control systems such as brakes and suspensions using compressed air sent from a compressor directly connected to the engine. This compressed air contains moisture contained in the atmosphere and oil that lubricates the inside of the compressor. When this compressed air containing moisture and oil enters each system, rust and swelling of a rubber member (O-ring or the like) are caused, causing a malfunction. For this reason, the air dryer for removing the water | moisture content and oil content in compressed air is provided downstream of the compressor of an air system (for example, refer patent document 1).

  In the air dryer, a desiccant such as a filter, silica gel or zeolite is provided. And an air dryer performs the dehumidification effect | action which removes a water | moisture content, and the reproduction | regeneration effect | action which removes the water | moisture content adsorbed by the desiccant and discharge | releases outside.

  By the way, since the oil released from the air dryer during regeneration of the desiccant contains oil as well as moisture, it is considered to provide an oil separator downstream of the compressor of the air system in consideration of environmental load.

  As an oil separator, there is a collision plate type in which a plurality of collision plates with which air containing moisture and oil collides are provided in a casing (for example, see Patent Document 2). This collision plate type oil separator collects oil and discharges clean air by performing gas-liquid separation by colliding air with the collision plate.

Japanese Patent Laid-Open No. 10-296038 JP 2008-2377 A

  By the way, the oil separator is divided into a primary chamber and a secondary chamber by a partition wall. In the above oil separator, the oil content is not so much separated in the primary chamber, and the air containing the oil content flows into the secondary chamber and a large amount of oil is separated in the secondary chamber. For this reason, in the above oil separator, more oil is accumulated in the secondary chamber than in the primary chamber. Therefore, there has been a demand for an oil separator capable of separating a large amount of oil in the entire apparatus.

  This invention is made | formed in view of such a situation, The objective is to provide the oil separator which can isolate | separate many oil components with the whole apparatus.

Hereinafter, means for achieving the above-described object and its operation and effects will be described.
The invention according to claim 1 is an oil separator that separates and collects oil by colliding air containing oil that has flowed into the housing against the collision plate, and is configured from the collision plate and a space, A plurality of expansion chambers having a large cross-sectional area, and each expansion chamber is provided with at least two collision plates facing each other, and the collision plates obstruct the flow path toward the collision plates facing each other. The gist is that a baffle plate protruding like this is provided.

  According to this configuration, since each expansion chamber is composed of the collision plate and the space, the oil contained in the air collides with the collision plate and is separated in each expansion chamber. In addition, since at least two collision plates facing each other are provided in each expansion chamber, and since the baffle plates are provided on these collision plates, collision of oil contained in air is increased and separated. Further, by creating a flow in the vertical direction by the baffle plate, it is possible to drop the oil moisture particles to the bottom using gravity. Furthermore, it is possible to suppress the oil accumulated in the expansion chamber from jumping up and being contained in the air. Therefore, since the oil component isolate | separated in each expansion chamber increases, many oil components can be isolate | separated by the whole apparatus.

The gist of the invention described in claim 2 is that, in the oil separator according to claim 1, the extremely narrow portion is formed by bringing the large surfaces of the baffle plates close to each other.
According to this configuration, since the extremely narrow portion is formed by bringing the baffle plates close to each other, the flow path is narrowed, the speed of the air is reduced, and a large amount of oil contained in the air can be separated.

The gist of the invention described in claim 3 is that, in the oil separator according to claim 1 or 2, the expansion chambers are provided side by side in the horizontal direction.
According to this configuration, since the expansion chambers are provided in the horizontal direction, the protrusion in the vertical direction can be suppressed, and the influence on other members when mounted on the vehicle can be suppressed. For example, when mounting under the cargo compartment of a truck, the volume of the cargo compartment can be secured as large as possible.

The gist of the invention according to claim 4 is that, in the oil separator according to any one of claims 1 to 3, a through hole is formed in a lower portion of the collision plate.
According to this configuration, since the through hole is formed in the lower part of the collision plate, the separated oil can be stored in all the expansion chambers without being stored in each expansion chamber, so the volume capable of storing the oil is increased. Can be made.

  According to the present invention, in the oil separator, a large amount of oil can be separated by the entire apparatus.

The block diagram which shows the installation position of the oil separator in an air system | strain. The side view which shows the external structure of an oil separator. The longitudinal cross-sectional perspective view which shows the internal structure of an oil separator. The cross-sectional view which shows the heating part of an oil separator. The top view which shows the assembly structure of an oil separator. The disassembled perspective view which shows the assembly structure of an oil separator. The longitudinal cross-sectional enlarged view which shows the flow of the air in an oil separator. The block diagram which shows the installation position of the oil separator in an air system | strain.

Hereinafter, an embodiment in which the oil separator of the present invention is embodied in an exhaust system of an air dryer will be described with reference to FIGS.
As shown in FIG. 1, vehicles such as trucks, buses, and construction machinery control systems such as brakes and suspensions using compressed air sent from a compressor 1. For this reason, an air dryer 2 is provided downstream of the compressor 1 of the air system for removing oil and water from the compressed air and providing dry air. A desiccant is provided in the air dryer 2. The air dryer 2 performs a dehumidifying action for removing oil and moisture and a regenerating action for removing oil and moisture adsorbed on the desiccant and releasing them to the outside.

  Therefore, in this embodiment, the air (purge air) released from the air dryer 2 at the time of regeneration of the desiccant contains oil as well as moisture, so the oil separator 3 is installed downstream of the compressor 1 of the air system in consideration of environmental load. Provide. In particular, the oil separator 3 is provided in the exhaust system of the air dryer 2 and separates and recovers oil and moisture from purge air discharged when the air dryer 2 is regenerated.

  The oil separator 3 is a collision plate system in which a plurality of collision plates with which oil containing moisture collides are provided in the housing. The collision plate type oil separator 3 collects oil and discharges clean air by performing gas-liquid separation by colliding air containing oil and moisture with the collision plate.

  As shown in FIG. 2, the oil separator 3 is a rectangular parallelepiped casing 11 extending in the horizontal direction. An introduction port 14 and a discharge port 15 are formed on the front surface 12 and the back surface 13 of the casing 11 which are opposed to each other in the longitudinal direction. That is, the oil separator 3 is configured such that air passes from the left side to the right side in FIG. Further, a drain discharge port 17 is formed on the bottom surface 16 on the side where the discharge port 15 is formed to discharge drain containing oil and water separated from air.

  An opening 18 is formed on the upper surface of the housing 11. The opening 18 is closed by a rectangular lid 19. A sealing sheet 20 that covers the entire surface of the opening 18 is sandwiched between the opening 18 and the lid 19. The lid 19, the sealing sheet 20, and the housing 11 are fastened and fixed by a plurality of bolts 21 and nuts 22. The lid 19 regulates the movement of the accommodated member.

  As shown in FIG. 3, a plate-like partition wall 30 is provided at the central portion in the longitudinal direction in the housing 11. The casing 11 is partitioned in a horizontal direction by a partition wall 30 into a primary expansion chamber 31 on the introduction port 14 side and a secondary expansion chamber 32 on the discharge port 15 side. The cross-sectional area of the primary expansion chamber 31 and the secondary expansion chamber 32 is formed larger than the cross-sectional area of the introduction port 14. For this reason, the introduced air expand | swells and a passage speed becomes slow. By slowing the air passage speed, the saturated water vapor pressure is lowered and oil and water are more likely to aggregate, and the mass of the particles is increased to easily collide with the collision plate.

  A through hole (orifice hole) 30 a is formed at one location in the upper part of the partition wall 30. Therefore, the partition wall 30 functions as an orifice by the orifice hole 30a. In addition, a through hole is formed at a lower portion in the vicinity of the bottom surface 16 of the partition wall 30, and a communication hole 33 through which the drain separated and collected from the air passes between the expansion chambers 31 and 32 is provided.

  A pair of opposing collision plates 34 and 35 are provided on both sides of the partition wall 30 in the housing 11. The first collision plate 34 on the upstream side includes a first standing plate 34 a extending from the bottom surface 16 of the housing 11 to the lid 19, and the first standing plate 34 a toward the discharge port 15 in the longitudinal direction of the housing 11. A first baffle plate 34b extending vertically. In the first standing plate 34a of the first collision plate 34, a rectangular first through hole 34c extending in the width direction of the collision plates 34, 35 is formed below the connection portion of the first baffle plate 34b. .

  The second collision plate 35 on the downstream side includes a second standing plate 35 a extending from the bottom surface 16 of the housing 11 to the lid 19, and a second standing plate toward the introduction port 14 in the longitudinal direction of the housing 11. And a second baffle plate 35b extending vertically from 35a. The second standing plate 35a of the second collision plate 35 has a rectangular second through-hole 35c extending in the width direction of the collision plates 34, 35 of the second baffle plate 35b than the connection portion of the second baffle plate 35b. It is formed above.

  And the 1st baffle plate 34b and the 2nd baffle plate 35b protrude so that a flow path may be disturbed, and the very narrow part 36 which is a narrow clearance gap is formed by making a mutual large surface adjoin. Here, the first baffle plate 34b is located closer to the lid 19 than the second baffle plate 35b. The extremely narrow portion 36 increases the air passage speed, and the formation of the meandering flow path increases the chance of collision of the oil / water particles with the plate, thereby separating the oil / water from the air. Further, the presence of the baffle plates 34b and 35b prevents the oil and water that has fallen from being rolled up by the passing air and carried to the downstream side, thereby suppressing a decrease in the amount of collected drainage. A through hole is formed in one lower portion near the bottom surface 16 of the first collision plate 34 and the second collision plate 35, and a communication hole 33 through which the drain separated and collected from the air is provided.

  The primary expansion chamber 31 includes a pair of collision plates 34 and 35 and a space. In a space between the introduction port 14 and the pair of collision plates 34 and 35, a urethane foam (sponge or the like) 38 having a punching metal plate 37 having a plurality of holes attached on one side is installed. The urethane foam 38 captures oil moisture.

  The secondary expansion chamber 32 is also composed of a pair of collision plates 34 and 35 and a space. In a space between the pair of collision plates 34 and 35 and the discharge port 15, a crashed aluminum 39 sandwiched on both sides by a punching metal plate 37 having a plurality of holes is provided. The crashed aluminum 39 further captures oil moisture.

  As shown in FIG. 4, each expansion chamber 31, 32 is provided with a rib 40 that increases the strength of the housing 11. A cylindrical housing portion 23 for housing a heater 41 as a heating unit is formed on the bottom surface 16 side of the rib 40. An insertion port 24 into which the heater 41 is inserted is formed on the outer surface of the housing 11, and penetrates from the insertion port 24 to the housing portion 23. The heater 41 has a columnar shape, and is installed by being inserted into the housing portion 23 from the outer surface of the housing 11. The heater 41 is connected to a power source.

  A mounting hole 25 for attaching the thermostat 42 is formed above the insertion opening 24 on the outer surface of the housing 11. The thermostat 42 is attached to the attachment hole 25 and connected to the power source and the heater 41. The thermostat 42 detects the temperature of the housing 11 and controls the heating of the heater 41. By heating the casing 11 with the heater 41, water contained in the drain accumulated on the bottom surface of the casing 11 is evaporated as much as possible to generate drain having a high oil concentration. Furthermore, by heating the casing 11 with the heater 41, it is possible to prevent the moisture from being frozen in a cold region so that the drain cannot be discharged from the drain discharge port 17.

  As shown in FIGS. 5 and 6, partition walls 30, collision plates 34, 35, urethane foam 38, crashed aluminum 39, etc. are assembled on both sides of the inner wall 26 extending in the longitudinal direction of the housing 11. A plurality of a pair of assembly grooves 27 are formed as an assembly structure. The partition wall 30 and the collision plates 34 and 35 are assembled by being inserted into the assembly groove 27 from the opening 18 side of the housing 11. Here, the first collision plate 34 and the second collision plate 35 are assembled to the housing 11 by inserting the first collision plate 34 in order after the second collision plate 35 is inserted. The urethane foam 38 and the crashed aluminum 39 are assembled to the housing 11 by inserting the punching metal plate 37 into the assembly groove 27 from the opening 18 side of the housing 11. Therefore, the oil separator 3 of the present embodiment can change the mounting position of the partition wall 30, the collision plates 34 and 35, the urethane foam 38, and the crashed aluminum 39 by selecting from a plurality of assembly grooves 27. For the oil separator 3, a combination of the partition wall 30, the collision plates 34 and 35, the urethane foam 38, and the crushed aluminum 39 can be selected. Therefore, it can respond easily according to a specification request.

Next, the operation of the oil separator configured as described above will be described with reference to FIG.
As shown in FIG. 7, the air introduced into the primary expansion chamber 31 from the inlet 14 passes through the urethane foam 38 while oil and moisture are captured, and the first impingement plate 34 of the primary expansion chamber 31 is passed through. It passes through one through hole 34c. At this time, the oil and water colliding with the first standing plate 34a other than the first through hole 34c is separated from the air. And the air which passed the 1st through-hole 34c passes toward the very narrow part 36 formed of the 1st baffle plate 34b and the 2nd baffle plate 35b. At this time, the oil and water colliding with the second upright plate 35a and the second baffle plate 35b are separated from the air.

  The air that has passed through the extremely narrow portion 36 passes through the second through hole 35 c of the second standing plate 35 a and passes toward the orifice hole 30 a of the partition wall 30. At this time, the oil and water colliding with the partition wall 30 other than the orifice hole 30a is separated from the air.

  The air that has passed through the orifice hole 30 a of the partition wall 30 passes through the first through hole 34 c of the first standing plate 34 a of the secondary expansion chamber 32. At this time, the oil and water colliding with the first standing plate 34a other than the first through hole 34c is separated from the air. And the air which passed the 1st through-hole 34c passes toward the very narrow part 36 formed of the 1st baffle plate 34b and the 2nd baffle plate 35b. At this time, the oil and water colliding with the second upright plate 35a and the second baffle plate 35b are separated from the air.

  The air that has passed through the extremely narrow portion 36 passes through the second through hole 35 c of the second standing plate 35 a and passes toward the crashed aluminum 39. At this time, the air introduced into the crashed aluminum 39 passes while oil and moisture are further captured by the crashed aluminum 39, and clean air that does not contain oil is discharged from the discharge port 15 to the outside.

As described above, according to the embodiment described above, the following effects can be obtained.
(1) Since each of the expansion chambers 31 and 32 includes the collision plates 34 and 35 and the space, the oil and water contained in the air collides with the collision plates 34 and 35 and is separated in each of the expansion chambers 31 and 32. . Further, two collision plates 34 and 35 facing each other are provided in each of the expansion chambers 31 and 32, and since the collision plates 34 and 35 are provided with baffle plates 34b and 35b, oil and moisture contained in the air Collisions increase and many are separated. In addition, by creating a flow in the vertical direction by the baffle plates 34b and 35b, it is possible to drop the oil moisture particles to the bottom using gravity. Furthermore, it is possible to suppress the oil and water accumulated in the expansion chambers 31 and 32 from jumping up and being contained in the air. Therefore, since the oil and water separated in each expansion chamber 31 and 32 increases, a large amount of oil and water can be separated in the entire apparatus.

  (2) Since the extremely narrow portion 36 is formed by bringing the baffle plates 34b and 35b close to each other, the flow path is narrowed, the speed of air is reduced, and a large amount of oil and water contained in the air can be separated.

  (3) Since the expansion chambers 31 and 32 are provided side by side in the horizontal direction, the protrusion in the vertical direction can be suppressed and the influence on other members when the vehicle is mounted can be suppressed. For example, when mounting under the cargo compartment of a truck, the volume of the cargo compartment can be secured as large as possible.

  (4) Since the communication hole 33 is formed in the lower part of the collision plates 34 and 35 and the partition wall 30, the separated oil and moisture can be stored in all the expansion chambers 31 and 32 without being stored in each of the expansion chambers 31 and 32. Since it can do, the volume which can store oil moisture can be increased.

In addition, the said embodiment can be implemented with the following forms which changed this suitably.
In the above embodiment, the sealing sheet 20 is provided between the opening 18 and the lid 19 of the housing 11, but the sealing sheet 20 may be omitted. In addition, it is desirable that a hermetic seal is maintained between the opening 18 of the housing 11 and the lid 19.

  In the above-described embodiment, the baffle plates 34b and 35b extending perpendicularly to the standing plates 34a and 35a are provided. However, if the extremely narrow portion 36 can be maintained, the baffle plates 34b and 35b are provided as the standing plates 34a and 35a. It is not necessary to form perpendicularly to.

In the above embodiment, the extremely narrow portion 36 including the pair of baffle plates 34b and 35b is provided. However, an extremely narrow portion including a plurality of baffle plates that are paired with each other may be provided.
In the above embodiment, the communication hole 33 is formed in the lower part of the partition wall 30, but when the drain discharge port 17 is formed in each of the expansion chambers 31, 32, the communication hole 33 of the partition wall 30 may be omitted.

  In the above embodiment, the movement of the collision plates 34, 35, the partition wall 30, the urethane foam 38, the crashed aluminum 39, etc. is restricted by the lid 19. However, if the collision plates 34 and 35, the partition wall 30, the urethane foam 38, the crashed aluminum 39, and the like are fixed, the movement restriction by the lid 19 may be eliminated.

In the above embodiment, the crashed aluminum 39 is installed in the primary expansion chamber 31, but urethane foam 38 may be installed in place of the crashed aluminum 39.
In the above embodiment, the urethane foam 38, the collision plates 34 and 35, the partition wall 30 (orifice hole 30a), the collision plates 34 and 35, and the crashed aluminum 39 are arranged in this order. However, depending on the amount of oil and moisture discharged from the air dryer 2 (compressor 1), these arrangements may be changed, some members may be omitted, some members may be increased, or the members may be changed. .

  In the above embodiment, a partition plate that divides the inside of the housing 11 into an expansion chamber and a drain reservoir may be provided at the bottom of the housing 11. In this way, it is possible to prevent the drainage accumulated at the bottom of the housing 11 from being rolled up. Further, when there is a gap between the partition plate and the inner wall, the separated oil and moisture is moved from the gap to the drain reservoir. On the other hand, when there is no gap between the partition plate and the inner wall, it is desirable to form a communication hole for moving the separated oil and moisture to the drain reservoir.

In the above embodiment, the expansion chambers 31 and 32 are provided in the horizontal direction, but may be provided in the vertical direction.
In the above embodiment, the introduction port 14 is formed on the front surface 12 and the discharge port 15 is formed on the back surface. 15 may be formed.

  In the above embodiment, the primary expansion chamber 31 and the secondary expansion chamber 32 have substantially the same size, but the volume of the secondary expansion chamber 32 may be larger than the volume of the primary expansion chamber 31. In this way, the saturated water vapor pressure is further reduced and oil and water are likely to aggregate, and the mass of the particles is increased to easily collide with the collision plate. Therefore, more oil and water separated from the air can be stored in the secondary expansion chamber 32 than in the primary expansion chamber 31.

In the above configuration, the position where the assembly component can be assembled to the assembly groove 27 may be limited by changing the thickness of the assembly groove 27 and the plate for each assembly component.
In the embodiment described above, a plurality of assembly grooves 27 are formed on the inner wall 26 of the housing 11 as an assembly structure. However, the present invention is not limited to the grooves, and an engagement structure or the like may be employed.

In the above embodiment, the heater 41 is installed on the rib 40, but the heater 41 may be installed at a place other than the rib 40.
In the above embodiment, the heater 41 is provided in each of the expansion chambers 31 and 32, but may be provided only in one of the expansion chambers. Further, the quantity of the heaters 41 can be changed as necessary. Furthermore, if the heater 41 is not necessary, the omitted configuration may be adopted.

  In the above embodiment, the oil separator 3 is provided in the exhaust system of the air dryer 2 that is downstream of the compressor 1 of the air system. However, as shown in FIG. 8, the oil separator 3 may be provided downstream of the air system compressor 1 and upstream of the air dryer 2. If it does in this way, an oil component can be isolate | separated from the air containing the lubricating oil etc. of the compressor 1, and clean air can be supplied to the air dryer 2. FIG. Therefore, deterioration due to oil in the desiccant provided in the air dryer 2 can be suppressed.

  In the above embodiment, the oil separator 3 is provided in the air system in which the air dryer 2 is provided in vehicles such as trucks, buses, and construction machines. However, the oil separator 3 is used anywhere as long as it is used for separating oil from air containing oil and moisture. Can do. For example, the exhaust from the air dryer that dries the compressed air to the atmosphere in a factory or the like may be cleaned by an oil separator.

  DESCRIPTION OF SYMBOLS 1 ... Compressor, 2 ... Air dryer, 3 ... Oil separator, 11 ... Housing, 12 ... Front, 13 ... Back, 14 ... Inlet, 15 ... Discharge port, 16 ... Bottom, 17 ... Drain discharge port, 18 ... Opening , 19 ... Lid, 20 ... Sealing sheet, 21 ... Bolt, 22 ... Nut, 23 ... Housing, 24 ... Insertion hole, 25 ... Mounting hole, 26 ... Inner wall, 27 ... Assembly groove, 30 ... Partition, 30a ... Orifice Hole 31, primary expansion chamber 32, secondary expansion chamber 33, communication hole 34, first collision plate 34 a, first standing plate 34 b, first baffle plate 34 c, first through hole 35 ... second impingement plate, 35a ... second standing plate, 35b ... second baffle plate, 35c ... second through hole, 36 ... extremely narrow portion, 37 ... punching metal plate, 38 ... urethane foam, 39 ... crushed aluminum 40 ... Ribs 41 ... Heaters 42 ... Thermostat .

Claims (4)

In an oil separator that separates and collects oil by colliding air containing oil that has flowed into the housing against the collision plate,
It is composed of the collision plate and a space, and includes a plurality of expansion chambers having a larger cross-sectional area than the inflow port,
Each expansion chamber is provided with at least two collision plates facing each other,
The oil separator, wherein the collision plate is provided with a baffle plate protruding so as to disturb the flow path toward the opposed collision plate. In the oil separator according to claim 1,
An oil separator, wherein an extremely narrow portion is formed by bringing large surfaces of the baffle plates close to each other. The oil separator according to claim 1 or 2, wherein each of the expansion chambers is provided in the horizontal direction. The oil separator according to any one of claims 1 to 3, wherein a through hole is formed in a lower portion of the collision plate.

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