JP2013113113A - Oil separator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil separator configured to reduce the frequency of welding.SOLUTION: An oil separator includes a housing 40 constituted of a case 20 and a cover 30 which are welded to each other, and an intermediate body 50. The intermediate body 50 is fixed and supported in the housing 40 by the case-side supporting part 23 of the case 20 and the cover-side supporting part 33 of the cover 30. Consequently, as compared with a conventional case where a plurality of welding spots are needed, the case 20 and the cover 30 are welded at only one spot, thereby reducing cost by reducing the frequency of welding. Welding is performed at only one spot, thereby reducing overall dimensional tolerance of the oil separator 10 as compared with the case in which there are a plurality of welding spots.

Description

  The present invention relates to an oil separator.

Japanese Patent Application Laid-Open No. 2009-221858 is a so-called cyclone type oil separator, and as shown in FIG. 9, the first component 1 and the first component 1 are arranged on the upper side of the first component 1. A second component 2 welded to the component 1, a third component 3 disposed above the second component 2 and welded to the second component 2, and a third component An oil separator having a fourth component 4 disposed on the upper side of 3 and welded to the third component 3 is disclosed.
FIG. 10 shows a so-called labyrinth type oil separator, which is disposed on the first component 1 ′ and the first component 1 ′ and welded to the first component 1 ′. An oil separator having two component parts 2 ′ and a third component part 3 ′ arranged on the upper side of the second component part 2 ′ and welded to the second component part 2 ′ is disclosed Yes.

However, the conventional oil separator has the following problems.
The number of times of welding is a plurality of times (3 times or 2 times) and is often large. Therefore, it is difficult to reduce the cost. Further, since the dimensional tolerances of the welded portions are stacked by the number of welds, the dimensional tolerance in the vertical direction of the entire oil separator is large.

JP 2009-221858 A

  The objective of this invention is providing the oil separator which can reduce the frequency | count of welding compared with the past.

The present invention for achieving the above object is as follows.
(1) having a housing and an intermediate;
The housing includes a case that is welded to each other and a cover that is disposed on the upper side of the case, and a gas introduction portion that introduces an oil mixed gas therein, and oil separated from the oil mixed gas to the outside. A drain part for discharging the gas to the outside, and a gas discharging part for discharging the gas separated from the oil mixed gas to the outside,
The intermediate body is disposed inside the housing, and includes an oil separator that separates oil from the oil mixed gas.
The case includes a case-side support portion that supports the intermediate body from below, and the cover includes a cover-side support portion that supports the intermediate body from above, and the intermediate body includes the case-side support portion. An oil separator fixed and supported by the housing by being sandwiched between a support part and the cover side support part.
(2) The oil separator according to (1), wherein the intermediate body is fixed to and supported by the housing in a state where a part of the intermediate body is elastically deformed.

According to the oil separator of the above (1), since the intermediate body is fixed and supported by the housing by being sandwiched between the case side support part of the case and the cover side support part of the cover, there are a plurality of conventional parts. The welding location is only one location where the case and the cover are welded, and the cost can be reduced by reducing the number of times of welding. Further, since the number of welding locations is one, the dimensional tolerance of the entire oil separator can be reduced as compared with the case where there are a plurality of welding locations.

  According to the oil separator of the above (2), since the intermediate body is fixed and supported by the housing in a state where a part of the intermediate body is elastically deformed, the intermediate body has a variation in the relative position of the intermediate body with respect to the housing. It can be absorbed by elastic deformation.

It is a schematic front view of the oil separator of Example 1 of the present invention. It is sectional drawing of the oil separator of this invention Example 1. FIG. It is the sectional view on the AA line of FIG. It is a fragmentary sectional view which shows the modification (1st modification) of the oil separator of Example 1 of this invention. It is a fragmentary sectional view which shows the modification (2nd modification) of the oil separator of Example 1 of this invention. It is a fragmentary sectional view which shows the modification (3rd modification) of the oil separator of Example 1 of this invention. It is a model perspective view of the oil separator of this invention Example 2. FIG. It is sectional drawing of the oil separator of this invention Example 2. FIG. It is sectional drawing of the conventional cyclone type oil separator. It is sectional drawing of the conventional labyrinth type oil separator.

FIGS. 1-6 has shown the oil separator of this invention Example 1, FIG. 7, FIG. 8 has shown the oil separator of this invention Example 2. FIG.
Portions common to all the embodiments of the present invention are denoted by the same reference numerals throughout the embodiments of the present invention.
First, portions common to all the embodiments of the present invention will be described with reference to the drawings.

In the oil separator 10 according to the embodiment of the present invention, for example, oil (oil mist) is separated from blow-by gas (oil (oil mist) mixed gas) generated in a crankcase of an unillustrated automobile engine. The oil is returned to the crankcase. However, the oil separator 10 may separate oil in blow-by gas generated inside an internal combustion engine other than an automobile engine.

  The oil separator 10 is made of resin. As shown in FIG. 2, the oil separator 10 has a two-part housing 40 composed of a case 20 welded to each other and a cover 30 disposed on the upper side of the case 20, and a one-part structure or two or more parts. And an intermediate body 50 having a plurality of parts. That is, the oil separator 10 includes at least three component parts.

The case 20 includes a case lower wall portion 21 and a case side wall portion 22.
The case lower wall portion 21 constitutes a lower wall (bottom wall) of the housing 40.
The case side wall portion 22 is a portion that rises upward from the outer edge portion of the case lower wall portion 21, and constitutes a part (lower portion) of the side wall of the housing 40 in the vertical direction. The case side wall portion 22 includes an outward flange-shaped case flange portion 22a at the upper end portion.

The cover 30 includes a cover upper wall portion 31 and a cover side wall portion 32.
The cover upper wall portion 31 constitutes the upper wall (ceiling wall) of the housing 40.
The cover side wall portion 32 is a portion extending downward from the outer edge portion of the cover upper wall portion 31 and constitutes the remaining portion (upper portion) in the vertical direction of the side wall of the housing 40. The cover side wall portion 32 includes an outward flange-shaped cover flange portion 32a at the lower end portion.
The case 20 and the cover 30 are fixed to each other by welding the case flange portion 22a and the cover flange portion 32a.

As shown in FIG. 1, the housing 40 includes a gas introduction part 41 for introducing an oil mixed gas into the housing 20, a drain part 42 for discharging the oil separated from the oil mixed gas to the outside of the housing 40, and an oil mixture A gas discharge part 43 for discharging the gas from which the oil has been separated from the gas to the outside of the housing 40.
One gas introduction part 41, one drain part 42, and one gas discharge part 43 are provided. Although not particularly limited, for example, the gas introduction part 41 and the drain part 42 are tubular and are provided extending downward from the case lower wall part 21 of the case 20, and the lower end part or the vicinity thereof is opened. The gas discharge part 43 is tubular and extends upward from the cover upper wall part 31 of the cover 30, and the upper end part or the vicinity thereof is open.

  The intermediate body 50 is arrange | positioned inside the housing 40, as shown in FIG. As shown in FIGS. 2 and 3, the intermediate body 50 may have a multi-part configuration of two or more parts (a two-part configuration in the illustrated example), or a single-part configuration as shown in FIG. Good. The intermediate body 50 includes an oil separation part 51 that separates oil from the oil mixed gas introduced into the housing 40 from the gas introduction part 41.

The oil separator 51 may be a cyclone type as shown in FIGS. 2 and 3 (Example 1), a labyrinth type as shown in FIGS. 7 and 8 (Example 2), An inertial collision type (not shown) may be used, or another system may be used. The cyclone method is a method in which the oil mixed gas that has flowed through the gas introduction section is swirled and the oil is separated from the oil mixed gas by the centrifugal force generated by the swirling motion. The labyrinth type partly partitions the internal space of the oil separator, lengthens the flow path length of the oil mixed gas in the separator to encourage oil to fall by its own weight, and partially partitions the internal space of the separator. In this way, the flow velocity of the oil mixed gas is increased to encourage the oil to collide with the separator wall surface. In addition, the inertial collision type is a system in which a collision plate that collides with oil flowing through the gas introduction unit is provided, and an oil mixed gas is collided with the collision plate to adhere and separate the oil.
When the oil separation part 51 is a cyclone type as shown in FIGS. 2 and 3, a plurality (four in the illustrated example) of oil separation parts 51 may be provided.

  As shown in FIG. 2, the intermediate body 50 is not welded to the housing 40, and is fixed and supported by the housing 40 by being sandwiched between the case 20 and the cover 30 in the vertical direction. The intermediate body 50 is sandwiched and fixed when the case 20 and the cover 30 are welded. The case 20 includes a case-side support portion 23 that supports the intermediate body 50 from below. The cover 30 includes a cover-side support portion 33 that supports the intermediate body 50 from above. It is fixed and supported by the housing 50 by being sandwiched between the side support part 23 and the cover side support part 33 in the vertical direction.

The case side support portion 23 includes at least one of a first case side support portion 23a and a second case side support portion 23b.
The 1st case side support part 23a is provided in the case side wall part 22, and supports the part contact | abutted to the case side wall part 22 of the intermediate part 50 from the downward direction. The first case side support portion 23a is, for example, at least one of a stepped portion provided on the inner wall surface of the case side wall portion 22, a rib (not shown) provided on the inner wall surface of the case side wall portion 22, and the case flange portion 22a. It consists of one.
The second case-side support portion 23b is provided on the case lower wall portion 21, and supports a portion other than the portion in contact with the case side wall portion 22 of the intermediate portion 50 from below. The second case-side support portion 23b is configured by, for example, a protruding portion (rib) that protrudes upward from the intermediate portion other than the outer edge portion of the case lower wall portion 21 until it contacts the intermediate portion 50 upward.

It is desirable that the upper surface (protruding direction front end surface) of the second case-side support portion 23b has a V-shaped cross section (including a substantially V shape in which the deepest portion has an R shape). The intermediate body 50 in contact with the second case side support portion 23b is guided to the deepest portion of the V shape, and the relative position between the case 20 (housing 40) and the intermediate body 50 including the case where the case 20 and the cover 30 are welded. This is because it is possible to suppress the shift. Further, the intermediate portion 50c that comes into contact with the upper surface of the second case side support portion 23b having a V-shaped cross section also has a triangular shape (substantially triangular shape) so that the intermediate portion 50c can come into surface contact with the upper surface of the second case side support portion 23b. It is desirable to be (including a convex V shape including a substantially convex V shape). As shown in FIG. 6, the shape of the upper surface of the second case side support portion 23b and the shape of the intermediate body portion 50c contacting the upper surface of the second case side support portion 23b may be reversed. That is, the upper surface shape of the second case side support portion 23b is a triangular cross section (including a substantially triangular shape) (a convex V shape including a substantially convex V shape), and is formed on the upper surface of the second case side support portion 23b. The shape of the abutting intermediate part 50c may be a V-shaped cross section (including a substantially V-shaped).

As shown in FIG. 2, the cover-side support portion 33 includes at least one of a first cover-side support portion 33a and a second cover-side support portion 33b.
The 1st cover side support part 33a is provided in the cover side wall part 32, and supports the part contact | abutted to the cover side wall part 32 of the intermediate part 50 from upper direction. The first cover side support portion 33a is, for example, at least one of a stepped portion provided on the inner wall surface of the cover side wall portion 32, a rib (not shown) provided on the inner wall surface of the cover side wall portion 32, and the cover flange portion 32a. It consists of one.
The second cover side support portion 33b is provided on the cover upper wall portion 31, and supports a portion other than the portion that contacts the cover side wall portion 32 of the intermediate portion 50 from above. The second cover-side support portion 33b is configured by, for example, a protruding portion (rib) that protrudes downward from an intermediate portion other than the outer edge portion of the cover upper wall portion 31 until it contacts the intermediate portion 50 downward.

The lower surface (protruding direction front end surface) of the second cover side support portion 33a is preferably V-shaped in cross section (including a substantially V shape in which the deepest portion has an R shape). The intermediate body 50 in contact with the second cover side support portion 33b is guided to the deepest portion of the V-shape, and the relative position between the cover 30 (housing 40) and the intermediate body 50 including when the case 20 and the cover 30 are welded. This is because it is possible to suppress the shift. Further, the intermediate portion 50d that contacts the lower surface of the second cover side support portion 33b having a V-shaped cross section also has a triangular cross section (substantially triangular shape so that it can come into surface contact with the lower surface of the second cover side support portion 33b. It is desirable to be (including a convex V shape including a substantially convex V shape). Note that the shape of the lower surface of the second cover side support portion 33b and the shape of the intermediate portion 50d contacting the lower surface of the second cover side support portion 33b may be reversed. That is, the bottom surface shape of the second cover side support portion 33b is a triangular cross section (including a substantially triangular shape) (a convex V shape including a substantially convex V shape), and is formed on the bottom surface of the second cover side support portion 33b. The shape of the intermediate part 50d that abuts may be V-shaped in cross section (including substantially V-shaped).

The intermediate body 50 may be supported by being fixed to the housing 40 in a state where a part of the intermediate body 50 is elastically deformed (in a bent state).
As shown in FIG. 4, the intermediate body 50 is thinner than the other parts (compared to the case where the intermediate body 50 is not thinned) so that the intermediate body 50 can be elastically deformed relatively easily. As shown in FIG. 5, the intermediate body 50 may be provided with a bent portion 53.

Here, an operation common to the first and second embodiments of the present invention will be described.
(A) Since the intermediate body 50 is supported by being fixed to the housing 40 by being sandwiched between the case-side support portion 23 of the case 20 and the cover-side support portion 33 of the cover 30, there are a plurality of conventional welding locations. However, there is only one place where the case 20 and the cover 30 are welded, and the cost can be reduced by reducing the number of times of welding. Further, since the number of welding locations is one, the dimensional tolerance in the vertical direction of the entire oil separator 10 can be reduced as compared with the case where there are a plurality of welding locations.

(B) Since the intermediate body 50 is fixed and supported by the housing 40 in a state in which a part of the intermediate body 50 is elastically deformed, the intermediate body 50 is elastically deformed due to variations in the relative position of the intermediate body 50 with respect to the housing 40. Can be absorbed. Moreover, it can suppress that the intermediate body 50 inhibits welding with the stretching case 20 and the cover 30. FIG.

(C) When the case-side support part 23 includes the second case-side support part 23b, the case-side support part 23 does not include the second case-side support part 23b (for example, the case-side support part 23 The intermediate body 50 can be stably held by the housing 40 as compared with the case where only the first case side support portion 23a is provided.

(D) When the cover side support part 33 is provided with the second cover side support part 33b, when the cover side support part 33 is not provided with the first cover side support part 33b (for example, the cover side support part 33 is Compared to the case where only the first cover side support portion 33a is provided), the intermediate body 50 can be stably held by the housing 40.

(E) The intermediate body 50 is fixed and supported by the housing 40 by being sandwiched between the case side support portion 23 of the case 20 and the cover side support portion 33 of the cover 30, and the oil separation portion 51 is supported on the intermediate body 50. Therefore, by changing only the intermediate body 50 without changing the housing 40 (by changing only the intermediate body 50), various oil collecting performances required for the oil separator 10 can be accommodated. .

Next, parts unique to each embodiment of the present invention will be described.
[Example 1] (FIGS. 1 to 6)
In the first embodiment of the present invention, the intermediate body 50 has a two-part configuration as shown in FIGS. The oil separator 51 is a cyclone type. The case side support part 23 includes both a first case side support part 23a and a second case side support part 23b. The cover side support part 33 includes both a first cover side support part 33a and a second cover side support part 33b.

  As shown in FIG. 2, the intermediate body 50 includes a first intermediate part 50a and a second intermediate part that is disposed on the first intermediate part 50a and placed on the first intermediate part 50a. 50b. Since the intermediate body 50 has a two-part configuration, the case-side support portion 23 may not only support the first intermediate part 50a from below, but may also support the second intermediate part 50b from below. .

  In the first embodiment of the present invention, the oil mixed gas introduced into the housing 40 (separator 10) from the gas introduction portion 41 (see FIG. 1) flows into the oil separation portion 51 of the intermediate body 50 and enters the oil separation portion 51. Oil is separated. The separated oil flows downward from the oil separation part 51 to the outside of the oil separation part 51, flows through the lower wall (case lower wall part 21) of the housing 40, and flows into the drain part 42 (see FIG. 1). Then, it flows out of the housing 40 (separator 10) from the drain part 42. Further, the gas from which the oil has been separated flows upward from the oil separation part 51 to the outside of the oil separation part 51, and then flows out of the housing 40 (separator 10) through the gas discharge part 43.

In the embodiment 1 of the present invention, in addition to the operations common to the embodiments 1 and 2 of the present invention, the following specific operations can be obtained.
Even if the intermediate body 50 has a multi-part configuration, it can be sandwiched between the case 20 and the cover 30.

[Example 2] (FIGS. 7 and 8)
In the embodiment 2 of the present invention, the intermediate body 50 has a one-part configuration as shown in FIG. The oil separator 51 is a labyrinth type. The case side support portion 23 includes only the second case side support portion 23b. The cover side support portion 33 includes only the first cover side support portion 33a.

The intermediate body 50 partitions the inner space of the housing 40 (separator 10) into three spaces S1, S2, and S3.
As shown in FIG. 7, the space S1 communicates with the gas introduction part 41 at one end in the longitudinal direction of the space S1, and communicates with one end in the longitudinal direction of the space S2 at the other longitudinal end of the space S1. Yes.
The space S2 communicates with the other end in the longitudinal direction of the space S1 at one end in the longitudinal direction of the space S2, communicates with the one end in the longitudinal direction of the space S3 at the other longitudinal end of the space S2. Communicate.
The space S3 is above the space S1 and the space S2, communicates with the other longitudinal end of the space S2 at one longitudinal end of the space S3, and communicates with the gas discharge unit 43 at the other longitudinal end of the space S3. Communicate.

  In the embodiment 2 of the present invention, the oil mixed gas introduced into the housing 40 (separator 10) from the gas introduction part 41 flows into the space S1, and from the one end in the longitudinal direction of the space S1 to the other end in the longitudinal direction of the space S1. And flows into the space S <b> 2 through the first communication hole 54 provided in the intermediate body 50. When flowing into the space S2, it flows from one longitudinal end of the space S2 to the other longitudinal end of the space S2, and then flows into the space S3 through the second communication hole 55 provided in the intermediate body 50. When flowing into the space S3, it flows from one longitudinal end of the space S3 to the other longitudinal end of the space S3, and flows out of the housing 40 (separator 10) through the gas discharge portion 43. Note that the oil in the oil mixed gas is separated by dropping by its own weight and adhering to the wall surface of the intermediate body 50 and the housing 40 when the oil mixed gas flows through the spaces S1, S2, and S3. It flows through the wall (case lower wall portion 21) and the walls that define the spaces S1, S2 and the space S3 of the intermediate body 50, flows into the drain portion 42, and flows out of the housing 40 (separator 10) from the drain portion 42.

DESCRIPTION OF SYMBOLS 10 Oil separator 20 Case 21 Case lower wall part 22 Case side wall part 22a Case flange part 23 Case side support part 23a 1st case side support part 23b 2nd case side support part 30 Cover 31 Cover upper wall part 32 Cover side wall part 32a Cover flange portion 33 Cover side support portion 33a First cover side support portion 33b Second cover side support portion 40 Housing 41 Gas introduction portion 42 Drain portion 43 Gas discharge portion 50 Intermediate body 51 Oil separation portion 52 Thin portion 53 Bending Portion 54 First communication hole 55 Second communication hole S1, S2, S2 Space

Claims (2)

A housing and an intermediate body;
The housing includes a case that is welded to each other and a cover that is disposed on the upper side of the case, and a gas introduction portion that introduces an oil mixed gas therein, and oil separated from the oil mixed gas to the outside. A drain part for discharging the gas to the outside, and a gas discharging part for discharging the gas separated from the oil mixed gas to the outside,
The intermediate body is disposed inside the housing, and includes an oil separator that separates oil from the oil mixed gas.
The case includes a case-side support portion that supports the intermediate body from below, and the cover includes a cover-side support portion that supports the intermediate body from above, and the intermediate body includes the case-side support portion. An oil separator fixed and supported by the housing by being sandwiched between a support part and the cover side support part.   The oil separator according to claim 1, wherein the intermediate body is fixed and supported on the housing in a state in which a part of the intermediate body is elastically deformed.

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