CN220667660U

CN220667660U - Gas-liquid separator

Info

Publication number: CN220667660U
Application number: CN202322381777.4U
Authority: CN
Inventors: 赵玉宝; 张妤凡
Original assignee: Cummins Filtration SARL
Current assignee: Cummins Filtration SARL
Priority date: 2023-08-30
Filing date: 2023-08-30
Publication date: 2024-03-26
Anticipated expiration: 2033-08-30

Abstract

The present application relates to gas-liquid separators. The gas-liquid separator includes a housing, a shroud, at least one duckbill nozzle, and an impingement surface. The housing includes a first housing portion defining a first housing volume and a second housing portion defining a second housing volume. The first housing portion defines a first port configured to receive a flow of blowby gas. A shroud is coupled to the first housing portion and disposed within the first housing volume. The shroud includes an inlet portion defining at least one shroud opening and a skirt portion extending away from the shroud inlet portion in an axial direction and toward the second housing portion. The bottom surface of the skirt portion is inclined with respect to the extending direction of the skirt portion. A duckbill nozzle is disposed within the at least one shroud opening. An impingement surface is disposed downstream of the at least one duckbill nozzle.

Description

Gas-liquid separator

Technical Field

The present disclosure relates generally to the field of crankcase ventilation systems.

Background

During operation of an internal combustion engine, a portion of the combustion gases may flow from the combustion cylinders into the crankcase of the engine. These gases are commonly referred to as "blowby" gases. Blowby gas includes a mixture of aerosol, oil, and air. Blow-by gases are typically sent from the crankcase through a crankcase ventilation system. The crankcase ventilation system may pass the blowby gas through a coalescer (i.e., a coalescing filter element) to remove most or all of the aerosols and oil contained in the blowby gas. The filtered blowby gas ("clean" gas) is then vented to the ambient environment (in an open crankcase ventilation system) or returned to the intake of the internal combustion engine (in a closed crankcase ventilation system) for further combustion.

One type of separator uses inertial impaction air-oil separation to accelerate and direct the blowby gas stream through a nozzle or orifice to a high velocity toward the impactor, causing a sharp directional change affecting oil separation, thereby removing oil particles from the crankcase blowby gas (or aerosol). Another type of separator uses coalescence in a coalescing filter to remove oil droplets. In other arrangements, the separator may be rotated to increase the filtration efficiency of the coalescing filter element by rotating the filter media during filtration.

Disclosure of Invention

In one set of embodiments, a gas-liquid separator is provided. The housing has a first housing portion defining a first housing volume and a second housing portion defining a second housing volume. The first housing portion defines a first port configured to receive a flow of blowby gas. A shroud is coupled to the first housing portion and disposed within the first housing volume. The shroud includes a shroud inlet portion and a skirt portion. The shroud inlet portion defines at least one shroud opening. The skirt portion extends away from the shroud inlet portion in an axial direction and toward the second housing portion. The bottom surface of the skirt portion is inclined with respect to the extending direction of the skirt portion. At least one duckbill nozzle is disposed within the at least one shroud opening. An impingement surface is disposed downstream of the at least one duckbill nozzle.

In some embodiments, the skirt portion comprises: a lower portion disposed on a first side of the shroud proximate to a second port; and a high portion disposed on a second side of the shield, the second side opposite the first side.

In some embodiments, the gas-liquid separator further comprises a plate disposed at least partially within the first housing volume and at least partially within the second housing volume, the plate comprising: a first end wall defining an opening and a plate port enabling fluid communication between the first housing volume and the second housing volume; an axial wall extending axially away from the first end wall and toward the shroud; and a second end wall extending radially inward from the axial wall and spaced apart from the first end wall, wherein the impact surface is disposed on the second end wall; wherein the axial wall and the second end wall define a cavity that is fluidly separated from the first housing volume by at least the axial wall and the second end wall and is in fluid communication with the second housing volume via the opening of the first end wall.

In some embodiments, the gas-liquid separator further includes a diaphragm check valve disposed at the plate port, the diaphragm check valve configured to allow fluid flow from the first housing volume into the second housing volume and substantially prevent fluid flow from the second housing volume into the first housing volume.

In some embodiments, the second housing portion comprises: an oil port disposed proximate to and in fluid receiving communication with the plate port; and a conduit disposed within the second housing volume, the conduit having a conduit inlet configured to receive oil from an upstream device and a conduit outlet disposed at the cavity and configured to provide oil to the cavity; wherein the oil port is fluidly coupled to the conduit and is disposed between the conduit inlet and the conduit outlet.

In some embodiments, the gas-liquid separator further comprises a ball valve disposed between the plate port and the oil port, the ball valve configured to substantially prevent oil from flowing from the oil port into the plate port.

In another set of embodiments, a gas-liquid separator is provided. The housing has a first housing portion defining a first housing volume and a second housing portion defining a second housing volume. The first housing portion defines a first port configured to receive a flow of blowby gas. At least one duckbill nozzle is disposed downstream of the first port. The plate is disposed at least partially within the first housing volume and at least partially within the second housing volume. The plate includes a first end wall, an axial wall, and a second end wall. The first end wall defines an opening and a plate port that enables fluid communication between the first housing volume and the second housing volume. The axial wall extends axially away from the first end wall and toward the shroud. The second end wall extends radially inwardly from the axial wall and is spaced apart from the first end wall. An impact surface is disposed on the second end wall. The axial wall and the second end wall define a cavity that is fluidly separated from the first housing volume by at least the axial wall and the second end wall and is in fluid communication with the second housing volume via the opening. The impingement surface is disposed downstream of the at least one duckbill nozzle.

In some embodiments, the gas-liquid separator further includes the shroud coupled to the first housing portion and disposed within the first housing volume, the shroud including: a shroud inlet portion defining at least one shroud opening, wherein the at least one duckbill nozzle is disposed within the at least one shroud opening; and a skirt portion extending away from the shroud inlet portion and toward the second housing portion in an axial direction, wherein a bottom surface of the skirt portion is inclined with respect to an extending direction of the skirt portion.

It should be understood that all combinations of the foregoing concepts and additional concepts discussed in more detail below (with the proviso that such concepts are not mutually inconsistent) are considered to be part of the subject matter disclosed herein. In particular, all combinations of claimed subject matter appearing at the end of this disclosure are considered part of the subject matter disclosed herein.

Drawings

The foregoing and other features of the present disclosure will become more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings. It is to be understood that these drawings depict only several embodiments in accordance with the disclosure and are therefore not to be considered limiting of its scope, the disclosure will be described with additional specificity and detail through use of the accompanying drawings.

FIG. 1 is a cross-sectional view of a gas-liquid separator system according to an embodiment.

FIG. 2 is a perspective view of the gas-liquid separator system of FIG. 1 attached to an engine.

FIG. 3 is a cross-sectional view of a gas-liquid separator system according to another embodiment.

Throughout the following detailed description, reference is made to the accompanying drawings. In the drawings, like numerals generally designate like parts unless the context dictates otherwise. The illustrative embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other implementations may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented herein. It will be readily understood that the aspects of the present disclosure, as generally described herein, and illustrated in the figures, may be arranged, substituted, combined, and designed in a wide variety of different configurations, all of which are explicitly contemplated and form part of this disclosure.

Detailed Description

Embodiments described herein relate generally to gas-liquid separators that include "duckbill" nozzles to accelerate a flow of blowby gas toward an impingement plate to facilitate separation of liquid and aerosol from the flow of blowby gas. Embodiments described herein may also include an oil driven jet pump that facilitates removal of separated oil.

As described herein, a "duckbill" nozzle refers to an elastomeric nozzle that expands and contracts in response to pressure changes and maintains a higher velocity for higher efficiency than standard nozzles.

Referring to FIG. 1, a side cross-sectional view of a gas-liquid separator 100 is shown, according to one embodiment. The gas-liquid separator 100 may be included in an open crankcase ventilation system or a closed crankcase ventilation system. The gas-liquid separator 100 comprises a housing 101, the housing 101 having a first housing portion 102 defining a first housing volume 104 and a second housing portion 106 defining a second housing volume 108. The first housing portion 102 may be coupled to the second housing portion 106 (e.g., via a securing member such as a screw, nut, bolt, rivet, etc.). The sealing member 116 may be disposed between the first housing portion 102 and the second housing portion 106 to form a radial and/or axial seal between the first housing portion 102 and the second housing portion 106.

The first housing portion 102 includes a first port 110 and a second port 112. In the embodiment shown in fig. 1, the first port 110 is an inlet port and the second port 112 is an outlet port. For example, the first port 110 is configured to receive an unfiltered blowby gas flow (e.g., blow-by gas) and transmit the blowby gas flow toward the first housing volume 104 of the first housing portion 102. The blowby gas stream has a first flow rate. The first port 110 includes a body portion 111 defining a flow path through the first port 110. In some embodiments, the body portion 111 extends at least partially into the first housing volume 104 of the first housing portion 102.

The second port 112 is configured to receive a filtered flow of blowby gas (e.g., a "clean" blow-by gas). In some embodiments, when the gas-liquid separator 100 is included in a closed crankcase ventilation system, the second port 112 is configured to communicate the filtered blowby gas stream to downstream components, such as a turbine device, an intake manifold, and the like. In some embodiments, when the gas-liquid separator 100 is included in an open crankcase ventilation system, the second port 112 is configured to communicate the filtered blowby gas stream to the atmosphere.

The gas-liquid separator 100 includes a shroud 130. The shroud 130 is coupled to the first housing portion 102 and is disposed within the first housing volume 104. The shroud 130 includes a shroud body 132. The shroud body 132 includes a shroud inlet portion 134, the shroud inlet portion 134 being disposed at a first end of the shroud body 132 and proximate to the first port 110 such that the shroud inlet portion 134 receives the blowby gas flow from the first port 110. The shroud inlet portion 134 includes one or more shroud openings 136. Each shroud opening 136 is sized to receive a duckbill nozzle 160. Duckbill nozzle 160 is described in more detail herein.

The shroud body 132 includes a shroud skirt portion 138 disposed at a second end of the shroud body 132 opposite the first end. The shroud skirt portion 138 extends away from the shroud inlet portion 134 and toward the second housing portion 106 in an axial direction. The shroud skirt portion 138 defines a shroud volume 139. The shroud 130 at least partially separates the first housing volume 104 from the shroud volume 139. Each duckbill nozzle 160 is configured to direct a flow of blowby gas into the shroud volume 139.

The bottom surface 140 of the shroud skirt portion 138 is inclined relative to the direction of extension of the shroud skirt portion 138. More specifically, the bottom surface 140 of the shroud skirt portion 138 extends along a ramp 141, as shown in FIG. 1, the ramp 141 being angled relative to the direction of extension of the skirt portion 138. A lower portion 142 of the bottom surface 140 of the shroud skirt portion 138 is disposed on a first side of the shroud 130 proximate the second port 112. A high portion (randomized portion) 144 of the bottom surface 140 of the shroud skirt portion 138 is disposed on a second side of the shroud 130 opposite the first side.

The gas-liquid separator 100 includes a plate 180. The plate 180 is disposed at least partially within the first housing volume 104 and at least partially within the second housing volume 108. In some embodiments, a sealing member 185 may be disposed between the plate 180 and the second housing portion 106 to form a radial and/or axial seal between the plate 180 and the second housing portion 106.

In some embodiments, the plate 180 is detachably coupled to the second housing portion 106. For example, the plate 180 may be coupled to the housing 101 (e.g., via a securing member such as a screw, nut, bolt, rivet, etc.). In these embodiments, the plate 180 may be serviced (e.g., repaired and/or replaced) without damaging other components of the gas-liquid separator 100.

In other embodiments, the plate 180 is fixedly coupled to the second housing portion 106. In still other embodiments, the plate 180 is integrally formed with the second housing portion 106.

The plate 180 includes a first end wall 182. The first end wall 182 is disposed within the second housing portion 106 such that the first end wall 182 separates the first housing volume 104 from the second housing volume 108. The first end wall is substantially perpendicular to the direction of extension of the shroud skirt portion 138. The first end wall 182 defines an opening 181 that extends through the center of the first end wall 182 or near the center of the first end wall 182.

Plate 180 includes plate extension 183. The plate extension 183 extends away from the end wall 182 and toward the shroud 130 in the axial direction. As shown, at least a portion of the plate extension 183 is disposed within the shield volume 139. The plate extension 183 is disposed at or near the center of the first end wall 182 such that the first end wall 182 extends radially outward from the plate extension 183.

The plate extension 183 includes an axial wall 184, which axial wall 184 extends from the end wall 182 and extends in an axial direction towards the shroud 130 and/or towards the first housing portion 102. An axial wall 184 is provided at the periphery of the opening 181. At least a portion of the axial wall 184 is disposed within the shroud volume 139. The axial wall 184 is substantially perpendicular to the first end wall 182. The axial wall 184 is radially spaced from the center point of the first end wall 182.

The plate extension 183 includes a second end wall 186. The second end wall 186 is disposed within the shroud volume 139. The second end wall 186 extends radially inward from the axial wall 184 to a center point of the second end wall 186. The second end wall 186 is spaced apart from the first end wall 182. The second end wall 186 is substantially parallel to the first end wall 182. In some embodiments, the second end wall 186 defines an impact surface 188. In other embodiments, the impingement surface 188 is a surface of an impingement plate disposed on an upper surface of the second end wall 186 and within the shroud volume 139 proximate the shroud inlet portion 134. In any of these embodiments, the impingement surface 188 is disposed downstream of the duckbill nozzle 160. Thus, the blowby gas stream exiting the duckbill nozzle 160 impinges the impingement surface 188, and the impingement surface 188 separates the blowby gas stream into clean blowby gas and separated liquids, oils, gases, and/or aerosols (referred to herein as separated fluids) previously contained in the blowby gas stream.

As briefly described above, the impact surface 188 may be formed by a planar surface of the plate 180 (e.g., the second end wall 186) and/or by a separate impact plate disposed on the plate 180. In any of these embodiments, the impingement surface 188 is disposed downstream of the duckbill nozzle 160 and in the direct flow path of the blowby gas stream exiting the duckbill nozzle 160. The planar surface forming the impingement surface 188 upon which the blowby gas stream impinges extends along a plane that is at an angle of about 90 degrees relative to the flow direction of the blowby gas stream exiting the impingement surface 188.

The plate extension 183 defines a cavity 190. A cavity 190 is defined by the axial wall 184 and the second end wall 186. The cavity 190 is at least partially disposed within the shroud volume 139 and/or within the first housing volume 104. The cavity 190 is physically separated from the shroud volume 139 and the first housing volume 104 by the axial wall 184 and the second end wall 186. An opening 181 in the first end wall 182 enables fluid communication between the cavity 190 and the second housing volume 108.

The plate 180 includes a plate port 192. A plate port 192 is defined through the first end wall 182. The plate port 192 is disposed on a first side of the end wall 182 proximate the high portion 144 (e.g., away from the lower portion 142 and away from the second port 112). The plate port 192 enables fluid communication between the first housing volume 104 and at least a portion of the second housing portion 106 (e.g., the oil port 218 described herein below). More specifically, the plate port 192 is configured to facilitate draining oil (e.g., oil separated from the blowby gas stream) from the first housing volume 104 and into the second housing volume 108.

The plate 180 is spaced apart from the shroud 130 such that a gap 198 is formed between the shroud bottom surface 140 and the end wall 182 of the plate 180. The gap 198 is smaller near the lower portion 142 and larger near the upper portion 144.

As described above, the gas-liquid separator 100 includes at least one resilient nozzle, as shown by the duckbill nozzle 160. As shown, the duckbill nozzle 160 has a duckbill shape. The duckbill nozzle 160 is in series with the first port 110 and downstream of the first port 110 such that the duckbill nozzle 160 receives the flow of blowby gas from the first port 110 (e.g., via the shroud inlet portion 134). Duckbill nozzle 160 is positioned along the fluid flow path of blowby gas stream 42 between first port 110 and shroud volume 139. Duckbill nozzle 160 may be mounted on shroud 130 (e.g., at shroud opening 136) or fluidly coupled to shroud 130. Duckbill nozzles 160 are each disposed within a corresponding shroud opening 136. The duckbill nozzle 160 extends in an axial direction away from the shroud opening 136 (e.g., near the shroud inlet portion 134) and toward the plate 180 (e.g., the second end wall 186 and/or the impingement surface 188). The duckbill nozzle 160 is configured to transfer the flow of blowby gas downstream of the first port 110 into the shroud volume 139 and to the impingement surface 188.

The second housing portion 106 includes a conduit 210. A conduit 210 is disposed within the second housing volume 108. The conduit 210 includes a conduit inlet 212, the conduit inlet 212 being disposed at a first end of the conduit 210 and proximate to an exterior of the gas-liquid separator 100. Conduit inlet 212 is configured to receive a jet oil stream from an upstream oil source (e.g., an oil pump). The conduit 210 includes a conduit outlet 216, the conduit outlet 216 being disposed at a second end of the conduit 210 opposite the first end and within the second housing volume 108 proximate the cavity 190. The conduit outlet 216 is configured to provide oil to the cavity 190.

The second housing portion 106 includes an oil port 218 disposed proximate the plate port 192. The oil port 218 is configured to enable fluid communication between the first housing volume 104 and the second housing volume 108. More specifically, the oil port 218 is configured to enable fluid communication between the plate port 192 and the conduit 210. That is, the oil port 218 is in fluid receiving communication with the plate port 192. An oil port 218 is fluidly coupled to conduit 210 and is disposed between conduit inlet 212 and conduit outlet 216. As described above, the plate ports 192 are configured to facilitate draining oil (e.g., oil separated from the blowby gas stream) from the first housing volume 104 and into the second housing volume 108. More specifically, the plate port 192 facilitates draining oil from the first housing volume 104 and into the oil port 218.

The gas-liquid separator 100 includes a check valve, such as the ball valve 200 shown. Ball valve 200 is disposed between plate port 192 and oil port 218. The plate port 192 is configured to direct oil through the ball valve 200 toward the oil port 218. Ball valve 200 is configured to substantially prevent (e.g., under adverse or cold conditions) oil from flowing back from oil port 218 and into plate port 192. Ball valve 200 directs the flow of oil from plate port 192 into oil port 218. Ball valve 200 includes a valve chamber and a check ball positioned within (and movable by) the valve chamber. Ball valve 200 allows fluid to flow from plate port 192 to oil port 218 and substantially prevents backflow of fluid from oil port 218 to plate port 192.

The second housing portion 106 includes a second housing outlet 220. The second housing outlet 220 is provided at an outer surface of the second housing portion 106. The second housing outlet 220 is configured to direct fluid (e.g., oil) to a downstream component or device, such as an oil pan or another suitable component.

In operation, the gas-liquid separator 100 receives a flow of blowby gas (e.g., from a crankcase of an engine) at a first port 110. The first port 110 directs the flow of blowby gas into the inlet portion 134 of the shroud 130 and through the duckbill nozzle 160. Duckbill nozzle 160 directs the flow of blowby gas into shroud volume 139 and to impingement surface 188. As the blow-by gas stream exits the duckbill nozzle 160, the blow-by gas stream impinges against the impingement surface 188, and the impingement surface 188 separates the blow-by gas stream into clean blow-by gas and separated fluid. Clean blowby gas and fluid may flow from the shroud volume 139, through the gap 198, and into the first housing volume 104.

Advantageously, the shape of the shroud skirt portion 138 reduces the flow rate (e.g., mass flow rate, volumetric flow rate, etc.) of the separated blowby gas stream. For example, since the gap 198 is larger near the high portion 144, a majority of the clean blowby gas may flow from the shroud volume 139, through the gap 198, and into the first housing volume 104 near the high portion 144. Because the gap 198 is smaller near the lower portion 142, a small portion of the clean blowby gas may flow out of the shroud volume 139, through the gap 198, and into the first housing volume 104 near the lower portion 142.

Clean blowby gas may flow from the first housing volume 104 to the second port 112 and out of the gas-liquid separator 100. In some embodiments, clean blowby gas is vented to the ambient environment (e.g., in an open crankcase ventilation system). In other embodiments, clean blowby gas is sent to the intake of the internal combustion engine (e.g., in a closed crankcase ventilation system) for further combustion.

At least a portion of the separated fluid (e.g., oil) flows from the impingement surface 188 toward the first end wall 182. A portion of the separated fluid may flow into the plate port 192, through the ball valve 200, through the oil port 218, and into the conduit 210. Within conduit 210, a portion of the separated fluid combines with the oil jet. The conduit directs the flow of oil into the cavity 190. Oil flows from the cavity 190 into the second housing volume 108 and out the second housing outlet 220.

Referring now to FIG. 2, the gas-liquid separator 100 is shown coupled to an engine 260. As shown, the second housing portion 106 includes a mounting portion 250. The mounting portion is configured to receive one or more fasteners 252 (e.g., bolts). One or more fasteners 252 are configured to couple the gas-liquid separator 100 to the engine 260.

Referring now to FIG. 3, a gas-liquid separator system 100 is shown, according to another embodiment. The embodiment shown in fig. 3 is substantially similar to the embodiment shown in fig. 1, except that as shown in fig. 3, the gas-liquid separator system 100 does not include a ball valve 200 and a conduit 210. Instead, the gas-liquid separator system 100 includes a diaphragm check valve (diaphragm check valve) 300 disposed at the plate port 192. The diaphragm check valve 300 is configured to allow fluid (e.g., oil) to flow from the first housing volume 104 into the second housing volume 108. The diaphragm check valve 300 is configured to substantially prevent fluid from flowing from the second housing volume 108 into the first housing volume 104. The diaphragm check valve 300 may include a self-centering flap or a rubber flexible diaphragm to substantially prevent backflow. As the pressure at the first housing volume 104 increases, the diaphragm check valve opens and allows contained material (e.g., oil) to flow through and into the second housing volume 108.

As used herein, the term "about" generally means plus or minus 10% of the value. For example, about 0.5 would include 0.45 and 0.55, about 10 would include 9 to 11, and about 1000 would include 900 to 1100.

It should be noted that the term "example" as used herein to describe embodiments is intended to indicate that such embodiments are possible examples, representations, and/or illustrations of possible embodiments (and such term is not intended to mean that such embodiments must be special or excellent examples).

As used herein, the term "substantially" and any similar terms are intended to have a broad meaning consistent with the general and acceptable usage by those of ordinary skill in the art to which the presently disclosed subject matter pertains. Those skilled in the art who review this disclosure will appreciate that, unless otherwise indicated, these terms are intended to allow the description of certain features described and claimed without limiting the scope of such features to the precise numerical ranges provided. Accordingly, these terms should be construed to indicate that insubstantial or insignificant modifications or variations of the described and claimed subject matter are considered to be within the scope of the disclosure recited in the appended claims.

The terms "coupled," "connected," and the like as used herein mean that two members are directly or indirectly associated with each other. Such association may be fixed (e.g., permanent) or movable (e.g., detachable or releasable). Such association may be achieved by the two members or the two members and any additional intermediate members being integrally formed as a single unitary body with one another or by the two members or the two members and any additional intermediate members being attached to one another.

It is important to note that the construction and arrangement of the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. Other substitutions, modifications, changes and omissions may also be made in the design, operating conditions and arrangement of the various exemplary embodiments without departing from the scope of the embodiments described herein.

While this specification contains many specific implementation details, these should not be construed as limitations on the scope of any embodiments or of what may be claimed, but rather as descriptions of features specific to particular implementations of particular embodiments. Certain features that are described in this specification in the context of separate embodiments can also be implemented in combination in a single embodiment.

Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Furthermore, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.

Claims

1. A gas-liquid separator, characterized in that the gas-liquid separator comprises:

a housing having a first housing portion defining a first housing volume and a second housing portion defining a second housing volume, the first housing portion defining a first port configured to receive a flow of blowby gas;

a shroud coupled to the first housing portion and disposed within the first housing volume, the shroud comprising:

a shroud inlet portion defining at least one shroud opening; and

a skirt portion extending away from the shroud inlet portion and toward the second housing portion in an axial direction, wherein a bottom surface of the skirt portion is inclined with respect to an extending direction of the skirt portion;

at least one duckbill nozzle disposed within the at least one shroud opening; and

an impingement surface disposed downstream of the at least one duckbill nozzle.

2. The gas-liquid separator of claim 1, wherein the skirt portion comprises:

a lower portion disposed on a first side of the shroud proximate to a second port; and

a high portion disposed on a second side of the shield, the second side opposite the first side.

3. The gas-liquid separator of claim 1 or 2, further comprising a plate disposed at least partially within the first housing volume and at least partially within the second housing volume, the plate comprising:

a first end wall defining an opening and a plate port enabling fluid communication between the first housing volume and the second housing volume;

an axial wall extending axially away from the first end wall and toward the shroud; and

a second end wall extending radially inward from the axial wall and spaced apart from the first end wall, wherein the impact surface is disposed on the second end wall;

wherein the axial wall and the second end wall define a cavity that is fluidly separated from the first housing volume by at least the axial wall and the second end wall and is in fluid communication with the second housing volume via the opening of the first end wall.

4. A gas-liquid separator as claimed in claim 3, further comprising a diaphragm check valve disposed at the plate port, the diaphragm check valve configured to allow fluid flow from the first housing volume into the second housing volume and to prevent fluid flow from the second housing volume into the first housing volume.

5. A gas-liquid separator according to claim 3, wherein the second housing portion comprises:

an oil port disposed proximate to and in fluid receiving communication with the plate port; and

a conduit disposed within the second housing volume, the conduit having a conduit inlet configured to receive oil from an upstream device and a conduit outlet disposed at the cavity and configured to provide oil to the cavity;

wherein the oil port is fluidly coupled to the conduit and is disposed between the conduit inlet and the conduit outlet.

6. The gas-liquid separator of claim 5, further comprising a ball valve disposed between the plate port and the oil port, the ball valve configured to prevent oil from flowing from the oil port into the plate port.

7. A gas-liquid separator, characterized in that the gas-liquid separator comprises:

at least one duckbill nozzle disposed downstream of the first port; and

a plate disposed at least partially within the first housing volume and at least partially within the second housing volume, the plate comprising:

a second end wall extending radially inward from the axial wall and spaced apart from the first end wall, wherein,

an impact surface is provided on the second end wall;

wherein the axial wall and the second end wall define a cavity that is fluidly separated from the first housing volume by at least the axial wall and the second end wall and is in fluid communication with the second housing volume via the opening; and

wherein the impingement surface is disposed downstream of the at least one duckbill nozzle.

8. The gas-liquid separator of claim 7, further comprising a diaphragm check valve disposed at the plate port, the diaphragm check valve configured to allow fluid flow from the first housing volume into the second housing volume and to prevent fluid flow from the second housing volume into the first housing volume.

9. A gas-liquid separator according to claim 7 or 8, wherein the second housing part comprises:

10. The gas-liquid separator of claim 9, further comprising a ball valve disposed between the plate port and the oil port, the ball valve configured to prevent oil from flowing from the oil port into the plate port.

11. The gas-liquid separator of any one of claims 7-8 and 10, further comprising the shroud coupled to the first housing portion and disposed within the first housing volume, the shroud comprising:

a shroud inlet portion defining at least one shroud opening, wherein the at least one duckbill nozzle is disposed within the at least one shroud opening; and

a skirt portion extending away from the shroud inlet portion in an axial direction and toward the second housing portion, wherein a bottom surface of the skirt portion is inclined with respect to an extending direction of the skirt portion.

12. The gas-liquid separator of claim 11, wherein the skirt portion comprises: