The invention concerns a separator for a liquid from a gas flow and an assembly kit for a separator.
In reciprocating piston combustion engines, an oil-containing leakage gas is generated in the crankcase, the so-called blow-by gas. Its return into the combustion process is required by law worldwide and is realized in so-called closed crankcase venting systems. The most important tasks of a crankcase venting system include the oil separation and oil return into the crankcase as well as the control of the crankcase pressure. In this context, the requirements placed on the oil separation have steadily increased in recent years with the exhaust gas regulations becoming more stringent in order to protect emission-relevant engine components such as exhaust gas turbochargers, charge air coolers or sensors from performance loss by oil contamination. The oil separation provides a contribution to the minimization of the oil consumption as well as also an important contribution in regard to observing the exhaust gas regulations over the vehicle service life.
EP 3100780 A1 discloses an oil separator with an exchangeable filter element.
The invention is based on the object of providing a beneficial separator for a liquid from a gas flow that is suitable as a lifetime component.
A further object is providing an assembly kit for such a separator.
The aforementioned object is solved according to an aspect of the invention by a separator for separation of liquid from a gas flow, in particular for separation of oil from a blow-by gas in a crankcase venting system, comprising at least one nozzle carrier element with at least one nozzle arrangement with at least one nozzle, and comprising an impact element arranged downstream at least partially opposite the nozzle arrangement, wherein a permanent cover device for one or more nozzles of the nozzle arrangement is provided that reduces by at least 50% a through-flow of the gas flow through the one or more nozzles in relation to nozzles that are free from the cover device.
The permanent cover for one or more nozzles of the nozzle arrangement can be changed in the context of the initial assembly of the separator or for recurrent servicing events. In this context, the cover can be completely or partially removed from individual nozzles of the nozzle arrangement. A function as a controlling or regulating member, for example, of a valve, is not provided. The cover device is no valve body that changes its position in operation but is fixedly adjusted and unchanged across all operating states.
The further object is solved by an assembly kit for a separator, at least comprising a nozzle carrier element with at least one nozzle arrangement which comprises at least one nozzle; an impact element for arrangement downstream of the nozzle arrangement; a cover device for one or more nozzles of the nozzle arrangement that reduces by at least 50% a through-flow of the gas flow through the one or more nozzles in comparison to nozzles that are free from the cover device, wherein at least the nozzle carrier element, the impact element or/and a liquid reservoir are provided as carry over parts for different nozzle arrangements or number of nozzles.
Beneficial embodiments and advantages of the invention result from the additional claims, the description, and the drawing.
A separator for separating liquid from a gas flow is proposed, in particular for separating oil from a blow-by gas in a crankcase venting system, comprising at least one nozzle carrier element with at least one nozzle arrangement with at least one nozzle, and comprising an impact element arranged downstream at least partially opposite the nozzle arrangement. A permanent cover device is provided for one or more nozzles of the nozzle arrangement that reduces by at least 50% a through-flow of the gas flow through the one or more nozzles in comparison to nozzles that are free from the cover device.
Preferably, the through-flow of the gas flow is reduced by at least 80%, particularly preferred by at least 95%. In that during assembly of the separator it can be determined which nozzles can be flowed through freely and which can be flowed through less or not at all, it can be achieved that separators for entirely different through-flows of the gas flow from a minimal to a maximal gas flow can be realized with identical components. In this way, for example, separators for entirely different performance classes of internal combustion engines can be produced with identical components.
Advantageously, the separator can be configured without filter element and the separated liquid can directly drain or the separated liquid can be collected in a reservoir. An exchange of a filter element, and thus an at least partial removal of the separator, is not necessary. Optionally, a filter element can however be arranged downstream of the separator.
According to a beneficial embodiment of the separator, a downstream distance, in relation to the nozzles, between nozzles and cover device can be smaller by at least 50% than a downstream distance between the impact element and the nozzles that are free from the cover device. Beneficially, the cover device can rest, for example, on the corresponding nozzles. For example, the impact element can comprise the cover device.
According to a beneficial embodiment of the separator, the nozzle carrier element and the impact element can comprise a positioning device with complementary positioning elements with which a relative position, in particular rotatory position, between cover device and nozzle arrangement can be fixed. For example, a positioning element can be formed by a projection, for example, in the form of at least one pin, in particular of a radially extending pin, and the complementary positioning element by one or more receptacles for the projection. The pin can be formed at the nozzle carrier element and a plurality of receptacles can be formed at the impact element, or vice versa.
According to a beneficial embodiment of the separator, the cover device can be arranged upstream of the nozzle arrangement. In particular, an upstream distance, in relation to the nozzles, between nozzles and cover device can be smaller by at least 50% than an upstream distance between the impact element and the nozzles that are free from the cover device. For example, a separate element can be arranged, viewed in the flow direction, in front of the nozzle arrangement that comprises an opening through which one or more nozzles are accessible unhindered for the gas flow.
According to a beneficial embodiment of the separator, the nozzle carrier element and the cover device can comprise a positioning device with complementary positioning elements with which a rotatory position between cover device and nozzle arrangement can be fixed. This is beneficial when nozzle carrier element and cover device are arranged coaxially to each other.
According to a beneficial embodiment of the separator, the nozzle carrier element can comprise a receptacle in which the impact element is arranged. The nozzle carrier element can have a pot-shaped cutout into which the impact element can be placed. Advantageously, nozzle carrier element and impact element can be arranged concentrically.
According to a beneficial embodiment of the separator, the nozzle carrier element can be arranged in a receptacle of a liquid reservoir. Advantageously, the liquid reservoir can have a drainage valve through which the liquid reservoir can be emptied from time to time.
According to a beneficial embodiment of the separator, the cover device can be integrated in the impact element. This enables a particularly compact configuration.
According to a beneficial embodiment of the separator, the cover device can be configured as a flat ring or ring segment. Advantageously, the ring or ring segment can be arranged in front of a ring-shaped or ring segment-shaped nozzle arrangement.
According to a beneficial embodiment of the separator, the cover device can be configured as a ring-type body with round or angular cross section. For example, the body can be a cylinder or a cuboid. The cross section of the body can be configured triangular or polygonal, for example, hexagonal. The corners of the cover device can serve as part of the positioning device and enable a positioning of a complementarily designed nozzle carrier element whose corners can also be part of the positioning device.
According to a beneficial embodiment of the separator, the cover device can be embodied as a cover. Alternatively or additionally to a coaxial arrangement, a separate cover can be arranged upstream of the nozzle arrangement.
According to a beneficial embodiment of the separator, the impact element and the nozzle carrier element can be arranged concentrically or coaxially about an axis. The corresponding arrangement can be selected depending on existing installation space and/or requirements on the separator.
According to a beneficial embodiment of the separator, the nozzle arrangement can be arranged as a circular segment or ring segment in the nozzle carrier element. A maximal number of nozzles can be realized on a tight installation space. In particular, the nozzle carrier element and the impact element can be arranged perpendicularly to the axis. For example, nozzle arrangement and impact element can interact with ring-shaped regions.
According to a beneficial embodiment of the separator, the nozzle arrangement can be arranged in a wall segment of the nozzle carrier element that is embodied parallel to the axis. Advantageously, a coaxial arrangement of a nozzle carrier element and impact element can be selected. In particular, the nozzle carrier element and the impact element can be arranged parallel to the axis. This is particularly beneficial in order to provide a maximal number of nozzles in a small installation space.
According to a further aspect of the invention, an assembly kit for a separator is proposed, comprising at least a nozzle carrier element with at least one nozzle arrangement which comprises at least one nozzle; an impact element for arrangement downstream of the nozzle arrangement; a cover device for one or more nozzles of the nozzle arrangement that reduces by at least 50% a through-flow of the gas flow through the one or more nozzles in comparison to nozzles that are free from the cover device, wherein the nozzle carrier element, the impact element, and a liquid reservoir in a special embodiment are provided as carry over parts for different nozzle arrangements and/or number of nozzles.
Advantageously, with such an assembly kit with carry over parts, numerous separators can be produced which exhibit different gas throughputs in that, upon assembly of the separator, more or fewer nozzles are covered or the distance between one or more nozzles and the cover element is reduced by at least 50% in relation to the downstream distance between the impact element and the nozzles.
The number of nozzles which are free from a cover device can be selected depending on a required differential pressure that is a function of the throughput rate of the blow-by gas. With particular advantage, the nozzle carrier element, the impact element and/or the liquid reservoir can be designed as carry over parts. The nozzle carrier element can comprise a maximal number of nozzles. Due to a positioning device with complementary positioning elements, it can be determined by a suitable arrangement of the complementary positioning elements relative to each other which nozzles can be flowed through substantially freely and which nozzles are covered, or the distance between one or more nozzles and the cover element is reduced by at least 50%. Likewise, the ring-shaped cover element can be designed as carry over part.
For example, maximally twelve nozzles can be provided in the nozzle carrier element and a through-flow region with minimal through-flow through a nozzle and maximal through-flow through all twelve nozzles can be exploited.
According to a beneficial embodiment of the assembly kit, complementary positioning elements can be provided at the nozzle carrier element and the impact element with which a relative position between the cover device and the nozzle arrangement can be fixed. This enables a simple assembly of separators from carry over parts for different performance classes.
According to a beneficial embodiment of the assembly kit, the cover device can coaxially surround the nozzle carrier element. Depending on positioning of the cover device in relation to the nozzle carrier element, more or fewer nozzles can be covered upon assembly of the separator.
Further advantages result from the following drawing description. In the drawings, embodiments of the invention are illustrated. The drawings, the description, and the claims contain numerous features in combination. A person of skill in the art will consider the features expediently also individually and combine them to expedient further combinations.
In the Figures, same or similar components are identified with same reference characters.
As can be seen in the section illustration in
The gas flow toward outlet 28 out of the housing 20 is indicated in
The separation module 100 of the separator 10 comprises a nozzle carrier element 102 into which an impact element 110 is inserted in a receptacle surrounded by a rim 103 (
As can be seen in
Beneficially, as many receptacles 134 as correspond to the maximal number of nozzles 106, 108 can be provided.
The relative, in particular rotatory, position of the impact element 110 in relation to the nozzle carrier element 102 can be selected in that a pin 132 is inserted into one of the receptacles 134 when the impact element 110 is placed into the receptacle surrounded by the rim 103 upon assembly of the separation module 100.
It is understood that the position of the complementary positioning elements 132, 134 can also be switched. Thus, the impact element 110 can comprise the receptacles 134 and the nozzle carrier element 102 the pin 132.
As shown in
As shown in
The impact element 110 is illustrated in more detail in
The nozzle arrangement 104 is formed by a semicircular arrangement of nozzles 106, 108. For reasons of simplification, only some are identified with reference characters. Depending on positioning of the pin 132 in the receptacles 134, nozzles 106 are arranged opposite the pyramidal region 113 and can be flowed through substantially freely while other nozzles 108 are arranged opposite the cover device 120 and are essentially covered by it downstream.
The separation module 100 can be fixedly connected to the top part 22 of the housing, for example, glued or welded or embodied as an injection-molded part. Alternatively, a form-fit connection is to be provided. The separation module 100 and the top part 22 of the housing are advantageously seal-tightly arranged relative to each other.
Beneficially, the nozzle carrier element 102 and the impact element 110 can be connected fixedly to each other, for example, glued or welded.
The configuration of nozzle carrier element 102 and impact element 110 is largely identical to the preceding embodiment so that for avoiding unnecessary repetitions reference is being had to
As can be seen in
Beneficially, as many receptacles 134 as correspond to the maximal number of nozzles 106, 108 can be provided.
The ring-shaped cover device 122 can be placed simply loosely between the nozzle carrier element 102 and the top part 52 of the liquid reservoir 50 and pressed with supports 58 against the bottom side of the nozzle carrier element 102.
A through-flow of the gas flow through the cover device 122 is enabled by a circular arc-shaped opening 123 which exposes nozzles 106 of the nozzle arrangement 104. This can be seen in
When in a particular embodiment the cover device 122 is not required for the technical function, it can be omitted when assembling the device.
In
In this embodiment, the positioning elements 132, 134 of the positioning device 130 can also be arranged interchanged.
The separation module 100 can be fixedly connected to the top part 22 of the housing, for example, glued or welded or embodied as an injection-molded part. Alternatively, a form-fit connection is to be provided. The separation module 100 and the top part 22 of the housing are advantageously seal-tightly arranged relative to each other.
The nozzle carrier element 102 can be connected with the housing parts by injection molding or with form fit. Alternatively, the nozzle carrier element 102 can be welded to another component or fixedly connected in another way.
Beneficially, the nozzle carrier element 102 and the impact element 110 can be fixedly connected to each other, for example, glued or welded.
In this embodiment, impact element 110 and nozzle carrier element 102 are arranged coaxially about the axis 150. The nozzle carrier element 102 is embodied as a polygonal hexagonal tube body and comprises on several lateral surfaces, for example, on each lateral surface, a nozzle arrangement 104 with a different number of nozzles 106, 108. The cover device 124 surrounds in this context the nozzle carrier element 102 with the exception of one lateral surface 109 so that the nozzles 106 in this lateral surface 109, of which for reasons of simplification only some are identified with reference characters, can be flowed through by a gas flow.
It is understood that the nozzle carrier element 102 and the cover device 124 can also be interchanged and the cover device 124 can be arranged downstream of the nozzle carrier element 102.
The positioning device 130 is formed by the corners of nozzle carrier element 102 and cover device 124. The rotatory position of nozzle carrier element 102 relative to the cover device 124 determines which nozzle arrangement 104 can be flowed through and which is covered.
In the illustrated embodiment, the cover device 124 can be embodied as one piece together with the top part 52 of the liquid reservoir 50. The nozzle carrier element 102 can be pushed simply into the cover device 124. Optionally, instead of the cover device 124, the nozzle carrier element 102 can be connected fixedly to the liquid reservoir 50.
The impact element 110 is arranged as an impact plate downstream of the lateral surface 109 and parallel thereto. The impact element 110 is embodied as angled element and fastened with a support plate 119 to a central pin of the top part 52 of the liquid reservoir 50.
The configuration in
Optionally, one or more cover devices 126 can also replace the cover device 124.
The different configurations according to the invention of the separation module 100 of the separator 10 permit advantageously making available an assembly kit for the separator 10 with carry over parts for different through-flows of a gas flow in a crankcase venting system 200.
Preferably, the assembly kit comprises carry over parts in the form of a nozzle carrier element 102 with at least one nozzle arrangement 104 which comprises at least one nozzle 106, 108; an impact element 110 for arrangement downstream of the nozzle arrangement 104; as well as a cover device 120, 122, 124, 126 for one or more nozzles 108 of the nozzle arrangement 104 that reduces by at least 50% a through-flow of the gas flow through the one or more nozzles 108 in comparison to nozzles 106 that are free from the cover device 120, 122, 124, 126; as well as a liquid reservoir 50. Moreover, the ring-shaped cover element 122 can be provided as carry over part.
The number of nozzles 106 that are free from a cover device 120, 122, 124, 126 can be selected depending on a required differential pressure that is a function of the through-flow rate of the blow-by gas.
With particular advantage, the nozzle carrier elements 102, the impact element 110, the liquid reservoir 50 can be configured as carry over parts. The nozzle carrier element 102 can comprise a maximal number of nozzles 106, 108. Due to the positioning device 130 with complementary positioning elements 132, 134, it can be determined by a suitable arrangement of the complementary positioning elements 132, 134 which nozzles 106 can be substantially freely flowed through and which nozzles 108 are covered. Likewise, the ring-shaped cover element 122 can be configured as carry over part.
For example, maximally twelve nozzles can be provided in the nozzle arrangement 104 and a through-flow region with minimal through-flow through one nozzle 106 and maximal through-flow through all twelve nozzles 106 can be exploited.
Number | Date | Country | Kind |
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10 2020 105 029.1 | Feb 2020 | DE | national |
This application is a continuation application of international application No. PCT/EP2021/052849 having an international filing date of 5 Feb. 2021 and designating the United States, the international application claiming a priority date of 26 Feb. 2020 based on prior filed German patent application No. 10 2020 105 029.1, the entire contents of the aforesaid international application and the aforesaid German patent application being incorporated herein by reference.
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Number | Date | Country | |
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Number | Date | Country | |
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Parent | PCT/EP2021/052849 | Feb 2021 | WO |
Child | 17895287 | US |