JP4635981B2 - Gas-liquid separator - Google Patents

Description

  The present invention relates to a gas-liquid separator, and more particularly to a gas-liquid separator that can improve the discharge performance of a separated liquid and suppress the backflow thereof.

As a conventional gas-liquid separator, one that centrifuges blow-by gas leaking from a combustion chamber of an automobile engine into gas and oil is known (see, for example, Patent Documents 1 and 2).
In Patent Document 1, an oil holding tank 6 is provided to improve the oil draining property, and the oil discharge port 61 of the oil holding tank 6 is closed while the engine is running, and the engine is stopped. A gas-liquid separator having a check valve 7 that sometimes opens the oil discharge port 61 is disclosed.
Patent Document 2 discloses a gas-liquid separator in which an oil discharge hole 46 is formed on the wall surface of the separator body.

However, in Patent Document 1, oil is continuously stored in the tank while the engine is running, so a large capacity tank is required. Further, since the check valve and its opening / closing mechanism are provided, the structure becomes complicated. Furthermore, there is a possibility that the valve body may be fixed or frozen due to an increase in oil viscosity or operation in a cold region.
In Patent Document 2, when the hole diameter of the oil discharge hole is large, the oil separated from the oil discharge hole may flow backward when the blow-by gas is sucked, and when the hole diameter of the oil discharge hole is small, the oil discharge hole may be discharged. There exists a problem that oiliness will fall.

JP 2005-146972 A JP 2003-49625 A

  This invention is made | formed in view of the said present condition, and it aims at providing the gas-liquid separator which can improve the discharge | emission property of the isolate | separated liquid and can suppress the backflow.

The present invention is as follows.
1. A cylindrical separator main body, an introduction portion provided in the separator main body and introducing a gas-liquid mixture into the separator main body in a tangential direction, and a liquid provided in the separator main body and discharged. In a gas-liquid separator comprising: a liquid discharge part that is provided; and a gas discharge part that is provided in the separator body and discharges the separated gas.
A storage section for storing the liquid discharged from the liquid discharge section; and a stored liquid discharge section for opening the tangential opening at a lower portion of the storage section and discharging the stored liquid .
A gas-liquid separator, further comprising a spiral plate provided in the storage unit and imparting a turning force to the gas-liquid mixture flowing in the storage unit.
2. The storage section has a taper section that decreases in diameter toward the upper side . The gas-liquid separator as described.
3. 1. The above-mentioned 1. further comprising a baffle part provided in the storage part and / or the separator main body and suppressing a backflow of the liquid stored in the storage part to the liquid discharge part . Or 2. The gas-liquid separator described in 1.
4). The storage section is a housing that covers the separator body . To 3. The gas-liquid separator as described in any one of.
5. The storage unit is a storage tank to which the liquid discharge unit of the separator body is connected . To 3. The gas-liquid separator as described in any one of.
6). The gas-liquid mixture is blowby gas . To 5. The gas-liquid separator as described in any one of.

According to the gas-liquid separator of the present invention, the gas-liquid mixture introduced in the tangential direction from the introduction portion into the separator body is turned into a swirl flow and centrifuged into a gas and a liquid, and the separated gas is discharged as a gas. On the other hand, the separated liquid is discharged from the portion to the outside, discharged from the liquid discharge portion, temporarily stored in the storage portion, and discharged from the stored liquid discharge portion to the outside. When the gas-liquid mixture is sucked, the gas-liquid mixture that flows backward from the stored liquid discharge portion into the storage portion is introduced into the storage portion in a tangential direction to be swirled.
As described above, since the storage section is provided and the liquid separated by the separator main body is discharged while being stored, the liquid dischargeability from the stored liquid discharge section of the storage section can be improved. Moreover, since the valve mechanism is not provided in the storage liquid discharge part of the storage part, size reduction of the storage part and simplification of a structure are realizable. Moreover, since the storage liquid discharge part provided by opening in the tangential direction is provided in the lower part of the storage part, the gas-liquid mixture which flows backward in the storage part can be made into a swirl flow. Therefore, the gas-liquid mixture can be centrifuged in the reservoir, and the separation efficiency can be improved. Further, a swirl force (centrifugal force) is applied to the stored liquid in the storage section by the gas-liquid mixture that forms a swirling flow in the storage section, so that the stored liquid can be prevented from jumping up and scattering. As a result, the backflow of the stored liquid to the liquid discharge part of the separator body can be suppressed, and the liquid discharge performance from the liquid discharge part of the separator body can be improved.
Further, since further comprising a spiral plate, it is possible to more reliably centrifuged liquid mixture to pivot the reservoir portion.
Moreover, when the said storage part has a taper part, the gas-liquid mixture swirling within a storage part can be centrifuged more reliably.
Moreover, when the baffle part is further provided, it can suppress more reliably that the stored liquid in a storage part flows backward to a liquid discharge part.
Moreover, when the said storage part is a housing which covers the said separator main body, it can discharge | emit while storing the isolate | separated liquid with a housing.
Moreover, when the said storage part is a storage tank to which the said liquid discharge part of the said separator main body is connected, it can discharge | emit while storing the separated liquid with a storage tank.
When the gas-liquid mixture is blowby gas, the blowby gas can be centrifuged into gas and oil.

1. Gas-liquid separator Embodiment 1 The gas-liquid separator according to the present invention includes a separator body, an introduction unit, a liquid discharge unit, a gas discharge unit, a storage unit, and a stored liquid discharge unit described below. The gas-liquid separator can further include, for example, one or more of a spiral plate, a baffle part, a communication part, and an intake part, which will be described later.
Although the use etc. of the said gas-liquid separator are not ask | required in particular, For example, it uses suitably as what centrifuges the blow-by gas of a vehicle engine into gas and oil.

As long as the “separator body” is cylindrical, its configuration, shape, material, etc. are not particularly limited.
By the separator main body, the gas-liquid mixture introduced into the separator is swirled and centrifuged into gas and liquid.
The separator main body can include, for example, cylindrical portions 2a and 12a and tapered cylindrical portions 2b and 12b connected to one end side of the cylindrical portion (see FIGS. 1 and 5).

As long as the “introducing portion” is provided in the separator main body and introduces the gas-liquid mixture into the separator main body in the tangential direction, the configuration, shape, material, and the like are not particularly limited.
The introduction part can be, for example, introduction pipes 3 and 13 provided on the upper part of the separator main body and extending in a tangential direction of the separator main body (see FIGS. 1 and 5 and the like).

As long as the “liquid discharge part” is provided at the lower part of the separator main body and discharges the separated liquid, its configuration, shape, material, etc. are not particularly limited.
The liquid discharge part can be, for example, liquid discharge pipes 4 and 14 provided in the lower part of the separator main body (see FIGS. 1 and 5).
The liquid discharge part can be arranged so as to open to the center side of a storage part, which will be described later, for example. Thereby, for example, when the vehicle travels on an inclined surface, it is possible to prevent the liquid surface of the liquid stored in the storage unit from being inclined and the liquid from flowing back to the liquid discharge unit.

As long as the “gas discharge part” is provided in the separator main body and discharges the separated gas, its configuration, shape, material, etc. are not particularly limited.
The gas discharge part can be, for example, gas discharge pipes 5 and 15 extending in the axial direction inside the separator main body (see FIGS. 1 and 5 and the like).

As long as the “reservoir” stores the liquid discharged from the liquid discharger, its configuration, shape, material, etc. are not particularly limited.
Examples of the storage section include (1) a form that is a housing 7 that covers the separator body (see FIG. 1 and the like), and (2) a form that is a storage tank 17 to which a liquid discharge part of the separator body is connected. (See FIG. 5 and the like).
The housing in the form (1) can be, for example, a head cover that constitutes a vehicle engine.
For example, the storage portion may have tapered portions 8 and 17b that are reduced in diameter toward the upper side (see FIGS. 1 and 5).

The “stored liquid discharge part” is not particularly limited in its configuration, shape, material, and the like as long as it is opened in the tangential direction below the storage part and discharges the stored liquid.
The stored liquid discharge part can be, for example, the stored liquid discharge pipes 9 and 19 provided below the storage part and extending in the tangential direction of the storage part (see FIGS. 3 and 6 and the like).
The opening area a of the stored liquid discharge part can be set to a value smaller than the opening area b of the liquid discharge part (see FIGS. 1 and 5, etc.).
Note that the swirling direction of the gas-liquid mixture flowing backward from the stored liquid discharge part into the storing part and the swirling flow of the gas-liquid mixture introduced from the introducing part into the separator main body are, for example, the same direction in plan view (See FIG. 2).

The “spiral plate” is not particularly limited in its configuration, shape, number, etc. as long as it provides a turning force to the gas-liquid mixture that is provided in the reservoir and flows in the reservoir.
For example, the spiral plate can be fixed to the inner peripheral wall of the storage section, or can be fixed to the outer peripheral wall of the separator body.
For example, the spiral plate may be provided over substantially the entire height of the housing, or may be provided from the bottom side of the housing to the opening end height of the liquid discharge portion of the separator body. .

As long as the “baffle part” is provided in the storage part and / or the separator main body and suppresses the backflow of the liquid stored in the storage part to the liquid discharge part, its configuration, shape, material, etc. It doesn't matter.
The said baffle part can be fixed to the inner wall of the said storage part, or can be fixed to the said separator main body, for example.
Examples of the shape of the baffle part include a flat plate shape, a curved plate shape, a lump shape, and an irregular shape.
The said baffle part can be opposed to the opening of the said liquid discharge part, for example (refer FIG. 4 etc.).

  The baffle part includes, for example, the first baffle part 23a and a second baffle part 23b provided around the first baffle part, and the first and second baffle parts serve as a storage part. Can be divided into a space S1 on the liquid discharge part side and a space S2 on the stored liquid discharge part side (see FIG. 4 and the like). At least one of the first baffle and the second baffle described above may have a tapered surface 24 that is inclined with respect to a horizontal plane, for example. By this taper surface, the liquid discharged from the liquid discharge portion of the separator main body is smoothly guided to the bottom side of the storage portion.

The “communication portion” is not particularly limited in its configuration, shape, material, and the like as long as it communicates the storage portion with the upstream side of the gas-liquid separation region of the separator body and / or the introduction portion.
When the storage part is the housing 7, the communication part is provided, for example, on the upstream side of the gas-liquid separation region of the separator body and / or the introduction part, and the communication pipes 6 and 6 'opening inside the housing. (See FIGS. 1 and 4 etc.). For example, the communication pipe 6 can be formed to extend in the tangential direction of the separator body.

The “intake part” is not particularly limited in its configuration, shape, material, and the like as long as it is provided at the upper part of the storage part and sucks the gas-liquid mixture outside the storage part.
The intake section may be, for example, an intake pipe 20 provided on the upper portion of the storage section (see FIG. 4 and the like). The intake pipe 20 can be formed, for example, so as to extend from the wall surface of the storage part at least inward of the storage part.
For example, the intake portion may be formed to open in the vertical direction on the upper wall of the storage portion, or may be formed to open in the lateral direction on the peripheral wall of the storage portion.
The opening area c of the intake part can be set to a value smaller than the opening area d of the introduction part (see FIG. 4 and the like).

Hereinafter, the present invention will be specifically described with reference to the drawings.
In the present embodiment, the “gas-liquid separator” according to the present invention is exemplified by a vehicle engine blow-by gas that is centrifuged into gas and oil.

Example 1
(1) Gas-liquid separator The gas-liquid separator 1 which concerns on the present Example 1 is provided with the substantially cylindrical separator main body 2 as shown in FIGS. The separator body 2 has a cylindrical portion 2a and a tapered cylindrical portion 2b that is continuous with the lower end side of the cylindrical portion 2a. The peripheral wall of the cylindrical portion 2a is provided with an introduction pipe 3 (illustrated as an “introduction portion” according to the present invention) extending in the tangential direction of the separator body 2. In addition, a communication pipe 6 (illustrated as a “communication part” according to the present invention) that is parallel to the introduction pipe 3 and extends in the tangential direction of the separator main body 2 is provided on the peripheral wall of the cylindrical part 2a. The communication pipe 6 opens in a housing described later. In addition, an oil discharge pipe 4 (illustrated as a “liquid discharge portion” according to the present invention) is provided on the lower end side of the tapered cylindrical portion 2b. . In addition, the center of the upper wall of the separator body 2 is illustrated as a gas discharge pipe 5 (a “gas discharge section” according to the present invention) extending in the vertical direction (swivel axis direction) inside the separator body 2. ) Is provided.

  The gas-liquid separator 1 includes a substantially cylindrical housing 7 (illustrated as a “reservoir” according to the present invention) that covers the entire separator body 2. The lower peripheral wall of the housing 7 is provided with a stored oil discharge pipe 9 (exemplified as a “stored liquid discharge portion” according to the present invention) extending in the tangential direction of the housing 7. The stored oil discharge pipe 9 opens in the tangential direction of the housing 7. The opening area a of the stored oil discharge pipe 9 is set to a value smaller than the opening area b of the oil discharge pipe 4.

(2) Action of gas-liquid separator Next, the action of the gas-liquid separator 1 will be described.
Blow-by gas leaking from the combustion chamber of the vehicle engine is introduced into the separator body 2 from the introduction pipe 3 from the tangential direction. Then, the introduced blow-by gas turns into a swirl flow and is centrifuged into gas and oil (oil mist). The separated gas is discharged to the outside through the gas discharge pipe 5, while the oil after the separation flows downward on the inner peripheral surface side of the separator body 2 by its own weight and flows from the oil discharge pipe 4 into the housing 7. It is temporarily stored in the bottom of the. Thereafter, when the idling force of the blow-by gas flowing backward from the stored oil discharge pipe 9 becomes smaller than the weight of the stored oil at the time of idling or the like, the stored oil is discharged from the stored oil discharge pipe 9 to the outside.

When sucking in the blow-by gas, the blow-by gas that flows backward from the stored oil discharge pipe 9 into the housing 7 is introduced into the housing 7 in a tangential direction and is swirled to be centrifuged. The separated gas is discharged to the outside from the gas discharge pipe 5 through the oil discharge pipe 4, while the separated oil is temporarily stored in the bottom portion in the housing 7. Moreover, centrifugal force is given to the stored oil in the housing 7 by the blow-by gas made into the swirl flow, and the outer peripheral portion of the stored oil has a higher level than the center (see FIG. 1).
A part of the blow-by gas that flows back into the housing 7 from the stored oil discharge pipe 9 flows into the upstream side of the gas-liquid separation region of the separator body 2 through the communication pipe 6 and is centrifuged in the separator body 2. To be separated.
The swirling flow of blow-by gas in the separator body 2 and the swirling flow of blow-by gas in the housing 7 are in the same direction in plan view (see FIG. 2). Further, during suction of blow-by gas, the suction force (negative pressure) Q applied to the gas discharge pipe 5 is the sum of the suction force Q1 of the introduction pipe 3 and the suction force Q2 of the stored oil discharge pipe 9 (see FIG. 1). .

(3) Effects of Embodiment 1 In the gas-liquid separator 1 of Embodiment 1, since the oil separated in the separator body 2 is discharged by the housing 7 while being stored, the stored oil discharge pipe of the housing 7 is used. The oil can be discharged from 9. Further, since the stored oil discharge pipe 9 of the housing 7 is not provided with a valve mechanism that is closed during operation as in the prior art, the stored oil in the housing 7 can be discharged even during operation, and the housing 7 can be downsized. And simplification of the structure can be realized.

  In the first embodiment, the storage oil discharge pipe 9 extending in the tangential direction is provided on the lower peripheral wall of the housing 7, so that the blow-by gas that flows back into the housing 7 can be swirled. Therefore, the blow-by gas flowing backward in the housing 7 can be centrifuged, and the separation efficiency can be improved. Moreover, centrifugal force is given to the stored oil in the housing 7 by the blow-by gas that becomes a swirling flow in the housing 7, and the stored oil is prevented from jumping up and scattering. As a result, the backflow of the stored oil to the oil discharge pipe 4 of the separator body 2 can be suppressed, and the oil discharge performance from the oil discharge pipe 4 of the separator body 2 can be improved.

  Further, in the first embodiment, the opening area a of the stored oil discharge pipe 9 is set to a value smaller than the opening area b of the oil discharge pipe 4, so that the backflow of blow-by gas to the stored oil discharge pipe 9 is more reliably performed. While being able to suppress, the oil discharge property from the oil discharge pipe 4 can be improved more.

  In the first embodiment, since the blow-by gas that has flowed back into the housing 7 from the stored oil discharge pipe 9 is caused to flow into the separator body 2 by the communication pipe 6 and centrifuged, the back-flow of the blow-by gas flows. As a result, the splashing, scattering, and the like of the stored oil are more reliably suppressed, and the inflow of the backflow gas to the oil discharge pipe 4 is more reliably suppressed.

(Example 2)
(1) Gas-liquid separator The gas-liquid separator 11 which concerns on the present Example 2 is provided with the substantially cylindrical separator main body 12 as shown in FIG. The separator main body 12 includes a cylindrical portion 12a and a tapered cylindrical portion 12b that is continuous with the lower end side of the cylindrical portion 12a. An introduction pipe 13 (illustrated as an “introduction part” according to the present invention) extending in the tangential direction of the separator main body 12 is provided on the peripheral wall of the cylindrical part 12a. In addition, an oil discharge pipe 14 (illustrated as a “liquid discharge portion” according to the present invention) is provided on the lower end side of the tapered cylindrical portion 12b. Yes. In addition, a gas discharge pipe 15 (a “gas discharge part” according to the present invention) extending in the vertical direction (swivel axis direction) inside the separator body 12 is illustrated at the center of the upper wall of the separator body 12. ) Is provided. Further, in the separator main body 12, a plate-shaped baffle portion 33 is provided that suppresses the stored oil in the storage tank described later from flowing back to the oil discharge pipe 14.

  The gas-liquid separator 11 includes a substantially cylindrical storage tank 17 (illustrated as a “reservoir” according to the present invention) connected to the oil discharge pipe 14 of the separator body 12. The storage tank 17 includes a cylindrical portion 17a and a tapered cylindrical portion 17b that is continuous with the upper end side of the cylindrical portion 17a and has a diameter reduced upward. A storage oil discharge pipe 19 (illustrated as a “reserved liquid discharge unit” according to the present invention) extending in the tangential direction of the storage tank 17 is provided on the lower peripheral wall of the cylindrical portion 17a. The storage oil discharge pipe 19 is opened in the tangential direction of the storage tank 17. The opening area a of the stored oil discharge pipe 19 is set to a value smaller than the opening area b of the oil discharge pipe 14.

(2) Operation of gas-liquid separator Next, the operation of the gas-liquid separator 11 will be described.
Blow-by gas leaking from the combustion chamber of the vehicle engine is introduced from the introduction pipe 13 into the separator body 12 from the tangential direction. Then, the introduced blow-by gas turns into a swirl flow and is centrifuged into gas and oil (oil mist). The separated gas is discharged to the outside through the gas discharge pipe 15, while the oil after the separation flows downward on the inner peripheral surface side of the separator main body 12 by its own weight and is stored in the storage tank 17 from the oil discharge pipe 14. It is temporarily stored in the bottom of the inside. Thereafter, when the idling force of the blow-by gas flowing backward from the stored oil discharge pipe 19 becomes smaller than the weight of the stored oil, for example, during idling, the stored oil is discharged from the stored oil discharge pipe 19 to the outside.

When the blow-by gas is sucked, the blow-by gas that flows backward from the storage oil discharge pipe 19 into the storage tank 17 is introduced into the storage tank 17 in a tangential direction and is swirled to be centrifuged. The separated gas is discharged to the outside from the gas discharge pipe 15 through the oil discharge pipe 14, while the separated oil is temporarily stored in the bottom portion in the storage tank 17. Moreover, centrifugal force is given to the stored oil in the storage tank 17 by the blow-by gas made into the swirl flow, and the outer peripheral portion of the stored oil has a higher level than the center (see FIG. 1).
Further, the baffle portion 33 suppresses the backflow of the stored oil in the storage tank 17 to the oil discharge pipe 14.
The swirling flow of blow-by gas in the separator body 12 and the swirling flow of blow-by gas in the storage tank 17 are in the same direction in plan view. Further, during suction of blow-by gas, the suction force (negative pressure) Q applied to the gas discharge pipe 15 is the sum of the suction force Q1 of the introduction pipe 13 and the suction force Q2 of the stored oil discharge pipe 19 (see FIG. 5). .

(3) Effect of Embodiment 2 In the gas-liquid separator 11 of Embodiment 2, the oil separated in the separator main body 12 is discharged by the storage tank 17 while being stored. The oil dischargeability from the discharge pipe 19 can be improved. Further, since the stored oil discharge pipe 19 of the storage tank 17 is not provided with a valve mechanism that is closed during operation as in the prior art, the stored oil in the storage tank 17 can be discharged even during operation. Can be reduced in size and structure.

In the second embodiment, since the storage oil discharge pipe 19 extending in the tangential direction is provided on the lower peripheral wall of the storage tank 17, the blow-by gas that flows back into the storage tank 17 can be swirled. Accordingly, the blow-by gas can be centrifuged in the storage tank 17 and the separation efficiency can be improved. In addition, centrifugal force is applied to the stored oil in the storage tank 17 by the blow-by gas that forms a swirling flow in the storage tank 17, and the stored oil is prevented from jumping up and scattering. As a result, the backflow of the stored oil to the oil discharge pipe 14 of the separator body 12 can be suppressed, and the oil discharge performance from the oil discharge pipe 14 of the separator body 12 can be improved.
Moreover, in the present Example 2, since the taper part 17b is provided in the storage tank 17, the blow-by gas swirling within the storage tank 17 can be more reliably centrifuged.

In the second embodiment, the opening area a of the stored oil discharge pipe 19 is set to a value smaller than the opening area b of the oil discharge pipe 14, so that the backflow of blow-by gas to the stored oil discharge pipe 19 is more reliably performed. While being able to suppress, the oil discharge property from the oil discharge pipe 14 can be improved more.
In the second embodiment, the baffle portion 33 that faces the opening of the oil discharge pipe 14 is provided in the storage tank 17, so that the backflow of the stored oil to the oil discharge pipe 14 of the separator body 12 can be more reliably performed. While being able to suppress, the oil discharge property from the oil discharge pipe 14 of the separator main body 12 can further be improved.

In the present invention, the present invention is not limited to the first and second embodiments, and various modifications can be made within the scope of the present invention depending on the purpose and application. That is, in the first embodiment, the substantially cylindrical housing 7 is exemplified, but the present invention is not limited to this. For example, as shown by a one-dot chain line in FIG. 1, the tapered portion whose diameter is reduced upward from the bottom side. A housing 7 ′ having 8 may be used. By this taper portion 8, the blow-by gas swirling in the housing 7 'can be more reliably centrifuged.
Further, as indicated by a virtual line in FIG. 1, a spiral plate 27 may be provided on the inner wall of the housing 7. By this spiral plate 27, a turning force is applied to the blow-by gas turning in the housing 7, and the blow-by gas can be more reliably centrifuged. Further, the spiral plate 27 may be similarly provided in the storage tank 17 in FIG.

  In the first embodiment, the communication pipe 6 is provided in the cylindrical portion 2a of the separator main body 2. However, the present invention is not limited to this. For example, the communication pipe 6 is provided above the tapered cylindrical portion 2b of the separator main body 2. Alternatively, as shown in FIG. 4, a communication pipe 6 ′ may be provided in the middle of the introduction pipe 3.

  Further, for example, as shown in FIG. 4, an intake pipe 20 extending from the wall surface to the inside and the outside of the housing 7 may be provided on the upper side wall of the housing 7. By this intake pipe 20, when blow-by gas is sucked, external blow-by gas is sucked into the housing 7, and backflow of blow-by gas from the stored oil discharge pipe 9 can be suppressed. As a result, the backflow of the stored oil to the oil discharge pipe 4 of the separator body 2 can be more reliably suppressed, and the oil discharge performance from the oil discharge pipe 4 of the separator body 2 can be further improved. In this case, it is preferable that the opening area c of the intake pipe 20 is set to a value smaller than the opening area d of the introduction pipe 3. This is because most of the blow-by gas can be introduced into the separator body 2 from the introduction pipe 3 and centrifuged while the amount of blow-by gas from the intake pipe 20 is minimized.

Further, for example, as shown in FIG. 4, a baffle portion 23 that suppresses the stored oil from flowing backward to the oil discharge pipe 4 may be provided in the housing 7. By this baffle portion 23, the backflow of the stored oil to the oil discharge pipe 4 of the separator body 2 is more reliably suppressed, and the oil discharge performance from the oil discharge pipe 4 of the separator body 2 is further improved. Can do. Specifically, the baffle part 23 includes a first baffle part 23a and a second baffle part 23b. The first baffle portion 23 a is disposed to face the opening of the oil discharge pipe 4. The second baffle portion 23b is fixed to the outer peripheral side of the first baffle portion 23a via a support rib (not shown). The outer peripheral side of the second baffle portion 23 b is fixed to the inner wall of the housing 7. A tapered surface 24 that is inclined with respect to a horizontal plane is formed on the upper surfaces of the first and second baffle portions 23a and 23b. The first and second baffle portions 23a and 23b divide the internal space of the housing 7 into a space S1 on the oil discharge pipe 4 side and a space S2 on the stored oil discharge pipe 9 side. Note that a communication port 25 is provided between the first and second baffle portions 23a and 23b to allow the spaces S1 and S2 to communicate with each other.
Further, in place of or in addition to the baffle portion 23, a baffle portion 23 ′ (indicated by an imaginary line in FIG. 4) that prevents the stored oil from flowing back into the oil discharge pipe 4 in the separator body 2. ) May be provided.
Further, in FIG. 5, as indicated by a virtual line, the baffle portion 33 may be provided below the oil discharge pipe 14, that is, above the storage tank 17.

  It is widely used as a technique for centrifuging a gas-liquid mixture into gas and liquid. In particular, it is suitably used as a technique for centrifuging blow-by gas of a vehicle engine into gas and oil.

1 is a longitudinal sectional view of a gas-liquid separator according to a first embodiment. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is a longitudinal drawing for demonstrating the further another form of a gas-liquid separator. It is a longitudinal cross-sectional view of the gas-liquid separator which concerns on the present Example 2. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5.

Explanation of symbols

  1, 1 ', 11; gas-liquid separator, 2, 12; separator body, 3, 13; introduction pipe, 4, 14; oil discharge pipe, 5, 15; gas discharge pipe, 7, 7'; 17; Storage tank, 8, 17b; Tapered portion, 9, 19; Storage oil discharge pipe, 23, 23 ′, 33;

Claims (6)

A cylindrical separator main body, an introduction portion provided in the separator main body and introducing a gas-liquid mixture into the separator main body in a tangential direction, and a liquid provided in the separator main body and discharged. In a gas-liquid separator comprising: a liquid discharge part that is provided; and a gas discharge part that is provided in the separator body and discharges the separated gas.
A storage section for storing the liquid discharged from the liquid discharge section, and a stored liquid discharge section for opening a tangential opening at a lower portion of the storage section and discharging the stored liquid .
A gas-liquid separator, further comprising a spiral plate that is provided in the storage unit and applies a turning force to the gas-liquid mixture flowing in the storage unit. The gas-liquid separator according to claim 1 , wherein the storage part has a taper part whose diameter decreases toward the upper side . The air according to claim 1 , further comprising a baffle portion provided in the storage portion and / or the separator main body, and further suppressing a backflow of the liquid stored in the storage portion to the liquid discharge portion. Liquid separator. The gas-liquid separator according to any one of claims 1 to 3, wherein the reservoir is a housing that covers the separator body . The gas-liquid separator according to any one of claims 1 to 3 , wherein the storage unit is a storage tank to which the liquid discharge unit of the separator body is connected . The gas-liquid separator according to any one of claims 1 to 5 , wherein the gas-liquid mixture is blow-by gas .

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