Coalescing separator insert, coalescing separator, and process for manufacturing a coalescing separator insert

Abstract

Disclosed is a coalescing separator insert (100; 102) for purifying a gas stream which, in the operating position of the coalescing separator insert (100; 102), flows through the coalescing separator insert (100; 102) from the outside inwards, the coalescing separator insert (100; 102) comprising: - a first coalescing separator part (10) comprising a first coalescing separator medium which is located around an air-permeable cylindrical first support tube (12) designed to support the first coalescing separator part (10); and - an additional coalescing separator part (20) comprising an additional coalescing separator medium which is located downstream of the first coalescing separator part (10) in the direction of flow of the gas stream and which -- is positioned concentrically to the first coalescing separator part (10), and -- is spaced radially from the first coalescing separator part (10) by a drainage space (30). Also disclosed is a coalescing separator comprising said coalescing separator insert (100; 102), wherein the additional coalescing separator part (20) has at least two coalescing separator medium layers (24, 25) which are each positioned concentrically to the first coalescing separator medium (10), e.g. concentrically around an additional cylindrical support tube (22) designed to support the additional coalescing separator part (20).

Description

[0001] Coalescence separator insert, coalescence separator and method for producing a coalescence separator insert

[0002] Technical area

[0003] The invention relates to a coalescing separator insert according to the preamble of claim 1 and to a coalescing separator according to the preamble of claim 11. The invention further relates to a method for producing a coalescing separator insert according to the preamble of claim 13.

[0004] State of the art

[0005] Air deoiling elements are known, for example, from document EP 1 738 816 B1. The air to be cleaned flows from the outside to the inside through the air deoiling element, where a multi-layer main separator operating according to the coalescence principle separates and coalesces oil droplets from the flowing air. The secondary aerosol exiting the main separator then flows through another coalescence separator body, a secondary separator, where the enlarged, coalesced droplets are separated and drained by gravity.

[0006] Heavy nonwovens, such as staple fiber nonwovens, especially carded materials, are typically used to manufacture the secondary separator. As shown in the figure of EP 1 738 816 B1, the secondary separator is constructed in a single layer. The single-layer nonwoven layer of the secondary separator is conventionally formed into a tube by sewing or welding and then pulled over the support tube.

[0007] The invention is based on the object of further developing a coalescence separator insert of the type mentioned above, a coalescence separator of the type mentioned above, and a method of the type mentioned above in such a way that the coalescence separator insert can be manufactured particularly easily and cost-effectively while still achieving a high separation efficiency. Above all, a space-saving, automated production of the secondary separator is to be provided.

[0008] Disclosure of the invention

[0009] This object is achieved by a coalescing separator insert having the features specified in claim 1, by a coalescing separator having the features specified in claim 11, and by a method having the features specified in claim 13. Advantageous embodiments and expedient further developments of the present invention are characterized in the respective dependent claims.

[0010] The present invention is therefore based on the fact that the additional coalescing separator body, designed in particular as a secondary separator, has at least two coalescing separator medium layers, in particular annular in cross-section, which are each arranged concentrically to the first coalescing separator medium. For example, the coalescing separator medium layers can be arranged concentrically around a cylindrical additional support tube designed to support the additional coalescing separator body. The additional support tube is optional. In principle, the structure of the multi-layer coalescing separator body can also function without an additional or further support tube. The additional support tube is a cylindrical hollow body, which can be made, for example, of metal, plastic, or fabric.

[0011] In other words, the additional coalescing separator body comprises at least one additional filter medium, which is arranged in an operational, optionally cut, stacked, wound, folded, etc., form and provides at least two coalescing separator medium layers. The coalescing separator medium layers are arranged consecutively or overlapping one another in the flow direction of the gas stream.

[0012] In the present invention, the entire further coalescing separator body is constructed in multiple layers. This multi-layer structure allows for easy adaptation of the further coalescing separator body to different dimensional and / or separation requirements.

[0013] An advantage of the present invention is that the number of layers of the additional coalescing separator body can be selected depending on the required separation efficiency. This makes it possible to produce different separator variants using the same coalescing separator material. In contrast, with prior art single-layer secondary separators, a specific, individually adapted coalescing separator material with a defined material thickness must be used to produce different separator variants.

[0014] As a material for the additional coalescing separator body, a coalescing separator medium material known from the prior art for secondary separators can be arranged in multiple layers, for example, around the additional support tube. This is particularly advantageous when increased demands are placed on the separation efficiency of the secondary separator.

[0015] Furthermore, a multi-layer structure of the secondary separator allows it to be manufactured from coalescence separator media, such as nonwovens, which are lighter than the single-layer secondary separator media known in the prior art and are available in large quantities and at low cost for standard applications. For example, the additional coalescence separator body can be made from at least one coalescence separator medium, such as a nonwoven fabric, with a mass per unit area of ​​up to 300 grams per square meter (g / m 2 ), approximately from 25 to 250 g / m 2 , preferably from 50 to 200 g / m 2 , be educated.

[0016] The manufacture of the additional coalescing separator body from several relatively thin layers of coalescing separator medium instead of a single thick layer has the further advantage that the connecting seams take up less radial space. This makes it possible to fill the saved space with additional layers of coalescing separator medium, thus increasing the separation efficiency. For example, staple fiber nonwovens and / or spunbonded nonwovens and / or meltblown nonwovens can be used as materials for the additional coalescing separator body. Spunbonded nonwovens are usually thin. The multi-layer structure enables the formation of thick layers. Staple fiber nonwovens produce relatively thick, cost-effective layers even with just a few layers. Furthermore, the material of the additional coalescing separator body can comprise at least substantially polyester, polyamide, or glass fibers, or mixtures thereof.

[0017] A thickness of all coalescence separator medium layers of the further coalescence separator body of an advantageous embodiment of the present invention, determined for example according to DIN EN ISO 9073-2, i.e. at a contact pressure of 0.5 kPa, is in total more than two millimeters (mm), in particular more than 2.5 mm, for example 4 mm to 10 mm.

[0018] A space-saving and cost-effective way of producing the further coalescing separator body of the coalescing separator insert according to the invention therefore consists in arranging at least two separate coalescing separator medium layer elements, in particular coalescing separator medium web elements, which are manufactured with an oversize in the circumferential direction, concentrically, for example, arranging them around the further support tube, in particular laying them around, such that their respective lateral end regions arranged perpendicular to the end face of the coalescing separator insert are arranged to overlap one another, and then connecting the overlapping lateral end regions to one another by means of a connecting seam extending along the longitudinal axis of the further coalescing separator body.

[0019] The track elements of each coalescence separator medium layer are arranged concentrically to the first coalescence separator medium (10), for example, in a semicircular configuration, such that the coalescence separator medium layer (24, 25) formed by them forms a closed cylindrical surface. For example, the track elements of each coalescence separator medium layer can be arranged around the additional support tube in such a way that the coalescence separator medium layer formed by them completely encloses the additional support tube in the circumferential direction.

[0020] Compared to the previous production of a secondary separator, in which the separator is formed into a tube, secured, and then pulled over the additional support tube, the additional coalescence separator body produced according to the present invention, in which the coalescence separator medium layer elements are placed, for example, around the additional support tube, and overlapping lateral end regions are secured together, is a significantly more cost-effective method of production. Furthermore, the additional coalescence separator body produced according to the present invention is easily adaptable to different separation requirements.

[0021] In addition, the construction of the coalescence separator medium layers from multiple elements enables further savings in the space occupied by the connecting seam. Thus, several, for example, two, small connecting seams require less radial space than one thick seam. The gained space can be used to provide additional coalescence separator medium layers arranged successively in the direction of flow, which increases the separation efficiency. Due to the multiple layers of the coalescence separator medium layers arranged successively in the direction of flow of the gas stream, as well as due to the construction of the individual coalescence separator medium layers from at least two elements, a higher separation efficiency can be achieved in the same space with the coalescence separator insert of the present invention than with a single-layer secondary separator known from the prior art.

[0022] In a preferred embodiment of the present invention, to produce the additional coalescing separator body, at least two, at least two-layer coalescing separator medium layer elements are placed, for example, from opposite sides, around a cylindrical cavity or around the additional support tube and are connected, in particular welded, to one another at overlapping side regions of the coalescing separator medium layer elements. In other words, a multi-layer additional coalescing separator body is formed by connecting, in particular by welding, four or more coalescing separator medium layer elements, in particular coalescing separator medium web elements. This makes it possible to define the number of layers of the additional coalescing separator body, for example the secondary separator, during its production and to select them depending on the requirements for the separation efficiency of the additional coalescing separator body.This allows the material for the subsequent coalescing separator body to be kept in stock, and different separator variants can be manufactured using the same coalescing separator medium material. In contrast, the production of a single-layer secondary separator, as is known from the prior art, requires a specific coalescing separator medium material with a specifically defined thickness for each separator variant. Furthermore, a cost-effective combination of at least two layers of different filter media is possible.

[0023] In order to enable particularly cost-efficient storage of the material for forming the coalescing separator body, the material of the coalescing separator medium layers advantageously has a uniform mechanical structure and is made of the same coalescing separator medium.

[0024] However, the layers or plies of the coalescing separator body can also be made of one or more different materials. Manufacturing two or more layers of the coalescing separator body from different material compositions makes it possible to combine the advantages of different materials. For example, each layer or ply of the coalescing separator body can have a different material composition.

[0025] The connecting seams are advantageously produced using welding, for example, ultrasonic welding. During the ultrasonic welding process, a sonotrode melts the coalescing medium material, bonding the material fibers together. Advantageously, the interconnected, overlapping regions of the coalescing medium layer elements extend from the further coalescing body into the drainage chamber, in other words, toward the first coalescing body or downstream. The overlapping regions extend radially outward in the case of a gas flow from outside to inside, or radially inward in the case of a gas flow from inside to outside. The connecting seams therefore project radially outward or radially inward.This has the advantage that the connecting seams serve to position the additional coalescing separator body in the coalescing separator insert, for example, as spacers to the first coalescing separator body. This prevents the additional coalescing separator body from getting caught or jammed on the first support tube when inserted into the coalescing separator insert, resulting in damage.

[0026] In this context, the term "outward" refers to a direction perpendicular to the longitudinal axis of the coalescing insert and directed radially outward from the longitudinal axis of the coalescing insert, i.e., toward the outer circumference of the coalescing insert. The term "inward" refers to a direction perpendicular to the longitudinal axis of the coalescing insert and directed radially inward from the outer circumference of the coalescing insert, i.e., toward the axis or center of the coalescing insert.

[0027] In order to enable centering of the further coalescing separator body in the coalescing separator insert, the respective elements of the coalescing separator medium layers are advantageously designed symmetrically, in particular mirror-inverted, to one another, for example arranged approximately symmetrically or substantially symmetrically around the further support tube.

[0028] In order to provide a particularly stable connection, the connecting seams are advantageously designed as continuous seams.

[0029] In order to provide a particularly stable connection, the connecting seams advantageously extend at least over two thirds of the length of the further coalescing separator body, preferably substantially over the entire length of the further coalescing separator body.

[0030] Surprisingly, it was discovered that sufficient dimensional stability of the additional support tube can be achieved simply by connecting the additional support tube to end plates arranged on the end faces, for example by adhesive bonding. Apart from the fixation to the end plates, no further fixation is required. Since the coalescing medium layers of the additional coalescing separator body are relatively light, they transfer only little pressure to the additional support tube. The additional support tube can thus be manufactured simply, cost-effectively, and stably by bonding a plate-like element bent cylindrically around its longitudinal axis, such as a sheet metal element with air openings, to the end faces by adhesive bonding. An additional axially extending connecting seam is not required.A multi-layer structure of the post-separator made of several layers of relatively light coalescence separator media thus enables a particularly cost-effective and efficient construction of the post-separator support tube.

[0031] In a further advantageous embodiment of the present invention, the further coalescence separator body is designed such that at a pressure of 200 Pascal [Pa], a gas flow permeability through the further coalescence separator body, determined for example according to DIN EN ISO 9237, is more than 300 liters per square meter second [l / m 2 s] and less than 4500 liters per square meter second [l / m 2 s] is.

[0032] In comparison, the gas flow permeability of the first coalescing separator body, in particular the main separator, is advantageously less than 400 l / m 2 s, for example 5-300 l / m 2 see

[0033] In conjunction with this or alternatively, in an advantageous embodiment of the present invention, the first coalescing separator medium can be arranged, in particular wound, in multiple layers around the first support tube. The main separator can have several, for example, 3 to 20, coalescing separator medium layers, such as fiberglass paper layers.

[0034] The additional coalescing separator body is advantageously designed such that it has a higher gas flow permeability, in particular air permeability, than the respective layers of the first coalescing separator body. For example, a single layer of the main separator can have a lower permeability than the entire secondary separator, for example, half the permeability of the secondary separator.

[0035] The present invention provides a coalescing separator insert and a coalescing separator with a post-separator optimized with regard to separation, drainage and manufacturing.

[0036] Furthermore, the present invention relates to the use of at least one coalescing separator insert of the type described above and / or a coalescing separator insert produced by the method of the type described above and / or a coalescing separator designed according to the type described above for de-oiling air in a compressed air or vacuum system which is fed by a connecting element of a machine, for example a compressor or a vacuum pump, which is lubricated for example, wherein the compressed air system is advantageously further designed to return the separated oil to the connecting element.

[0037] Finally, the present invention relates to the use of at least one coalescing separator insert of the type described above and / or a coalescing separator insert produced by the method described above and / or a coalescing separator designed according to the method described above for deoiling crankcase gases of an internal combustion engine. For example, the coalescing separator insert of the present invention can be used in the following applications: in a spin-on coalescing separator or spin-on air-oil separator, in a compressor designed to compress air, in a compressor designed for oil separation, wherein the oil is returned to the oil circuit, and in applications with oils of viscosity class VG32 and higher.

[0038] Short description of the drawings

[0039] As already discussed above, there are various possibilities for advantageously embodying and developing the teaching of the present invention. For this purpose, reference is made, on the one hand, to the claims subordinate to claim 1, claim 11, and claim 13. On the other hand, further embodiments, features, and advantages of the present invention are explained in more detail below, inter alia, with reference to the exemplary embodiment illustrated by Figures 1 to 5.

[0040] It shows:

[0041] Fig. 1 shows a longitudinal section of a first embodiment of a coalescing separator according to the present invention, the coalescing separator insert of which is manufactured according to the method according to the present invention;

[0042] Fig. 2 shows a partially sectioned view of the coalescence separator from Figure 1;

[0043] Fig. 3 is a detailed view of the coalescing separator from Figure 1;

[0044] Fig. 4 shows a perspective view of the further coalescing separator body of the coalescing separator insert from Figure 1;

[0045] Fig. 5 shows a cross-sectional view of the further coalescing separator body from Fig. 4, in which the various coalescing separator medium layers and the outwardly extending connecting seams are shown;

[0046] Fig. 6 shows another embodiment of a coalescing separator insert manufactured by the method according to the present invention; and

[0047] Fig. 7 shows a longitudinal section of the coalescence separator insert from Figure 6.

[0048] Identical or similar configurations, elements or features are provided with identical reference numerals in Figs. 1 to 7.

[0049] Embodiment(s) of the invention

[0050] Figure 1 shows a longitudinal section through a coalescence separator, namely a so-called spin-on air-oil separator 200. This is designed for the coalescence separation of particles from a gas or from a gas mixture, in particular for the coalescence separation of aerosol formed from liquid from air. The liquid to be separated can be, for example, oil, fuel, hydraulic fluid or

[0051] Coolant. The coalescing separator 200 has a cup-shaped, pressure-resistant housing body 210, in which an exemplary embodiment of a coalescing separator insert 100 constructed according to the present invention is accommodated.

[0052] A cover 212 serves to close the open end of the housing body 210. For supplying raw gas, the coalescing separator 200 has a raw gas inlet 220, which can be connected to a raw gas supply 320 of a connecting element of a machine, for example, a working machine, in particular a compressor, for example, a compressed air compressor, such as a screw compressor. For discharging the purified clean gas, the coalescing separator 200 has a clean gas outlet 240, which can be connected to a clean gas supply 330 of the connecting element.

[0053] In the spin-on air-oil separator 200 shown in Figure 1, the raw gas inlet 220 and the clean gas outlet 240 are arranged on the cover 212, with the clean gas outlet 240 having a central cylindrical recess in which a nipple 242, particularly a tubular nipple, extending axially through the cover 212 can be arranged. The nipple 242 is assigned to the connection element.

[0054] Furthermore, the lid 212 shown in Figure 1 has at least one closure element which can be moved by means of a rotational movement of the lid 220 between an open position, in which the nipple 242 can be guided through the lid 212 along a central axis L of the cup-shaped housing body 210, and a closed position in which the nipple 242 is fixedly connected to the lid 212.

[0055] To cover its respective end faces, the hollow cylindrical coalescence separator insert 100 shown in Figures 1 to 5 has an end plate 50, 52.

[0056] The embodiment of a coalescing separator insert 100 according to the present invention shown in Figures 1 to 5 is primarily designed for use in smaller coalescing separators, particularly spin-on separators. Such gas flow coalescing separators 200 can, for example, have a gas flow throughput of up to 8 standard cubic meters per minute at 7 bar operating pressure.

[0057] As an alternative to the embodiment shown in Figures 1 to 3, the coalescing separator could also be arranged in a compressed air tank (not shown). This differs from the spin-on air oil separator 200 in particular in that the raw gas inlet 220 is arranged on the compressed air tank, the clean gas outlet 240 is arranged on the cover 212, and the end plate facing the cover 212 has a radially extending flange designed for arranging the coalescing separator insert 100 in the pressure-resistant housing 210.

[0058] The coalescing separator insert 100 shown in Figures 1 to 5 serves to clean air flowing through it from the outside in. The coalescing separator insert 102 shown in Figures 6 and 7 is flowed through from the inside out. A main separator 10 of the coalescing separator insert 100, operating according to the coalescing principle, is arranged around an air-permeable, cylindrical supporting support tube 12, approximately wound in multiple layers around the support tube 12.

[0059] The main separator 10 can, for example, be made of glass fiber paper and contain a significant proportion of microglass fibers. For example, the main separator can comprise 5 to 20, approximately 15, individual layers. Each of these layers can, for example, have a weight of approximately 60 to 200 grams per square meter (g / m 3 ) and / or at a pressure of 200 Pascal [Pa] an air permeability of 5 l / m, for example as determined according to DIN EN ISO 9237 2s up to 300 l / m 2 s, about 30 l / m 2 s up to 300 l / m 2 s, and / or a thickness of approximately 0.4 mm to 2 mm, measured, for example, at a pressure of 10 kPa in accordance with ISO 543.

[0060] Arranged radially inside (cf. Figures 1 to 5) or radially outside (cf. Figures 6 and 7) a first coalescing separator body 10, namely a main separator 10, is a further coalescing separator body 20, namely a secondary separator, operating according to the coalescing principle. This secondary separator 20 is arranged concentrically or coaxially to the main separator 10 and can be spaced from the main separator 10 by a drainage chamber 30. In addition to draining the separated droplets, the drainage chamber 30 also ensures that the coalescing separator media of the main separator 10 and the secondary separator 20 do not become entangled when the coalescing separator insert is assembled.

[0061] In order for the post-separator 20 to withstand the pressure of the air flowing through it, it is arranged around a further supporting tube 22, a so-called post-separator center tube.

[0062] The post-separator 20 has at least two post-separator layers 24, 25 which are arranged successively in the flow direction of the gas flow and which are each arranged concentrically around the post-separator support tube 22.

[0063] The secondary separator layers 24, 25 and the main separator layer 10 are shown in Figure 1 in a series arrangement, in which the air flow runs from outside to inside. Alternatively, however, in the present invention, the air flow can also run from inside to outside, in which case the secondary separator layers 24, 25 would then be located radially closer to the longitudinal axis L of the coalescing separator insert 100; 102 than the main separator 10.

[0064] The drainage layers 24, 25 are therefore always located downstream of the main separator 10. This means that when the gas flow is directed from the outside to the inside, the drainage layers 24, 25 are closer to the longitudinal axis L of the coalescing separator insert 100; 102, and when the gas flow is directed from the inside to the outside, the main separator 10 is closer to the longitudinal axis L of the coalescing separator insert 100; 102. Each post-separator layer 24, 25 in turn has two material web elements 24a, 24b, 25a, 25b arranged opposite one another. These material web elements 24a, 24b, 25a, 25b are arranged in a semicircle around the post-separator support tube 22 such that the post-separator layer 24, 25 formed by them completely encloses the post-separator support tube 22.

[0065] In total, the post-separator 20 shown in Figures 1 to 5 comprises four material webs 24a, 24b, 25a, 25b that converge toward the central tube 22. Two material webs are wrapped around the central tube from opposite sides and then welded and cut by two sonotrodes at approximately opposite areas. In the present invention, the layers of the post-separator are thus connected, for example, welded, to the additional support tube 22.

[0066] The approximately opposite seams 26 serve as spacers and for centering the secondary separator 20 in the air / oil separator element 100 (see Figure 2). In the prior art, however, in which the secondary separator layers are held together only by a correspondingly thicker connecting seam, the secondary separator tends to sit eccentrically in the coalescing separator insert.

[0067] The process of wrapping material around the center tube and welding it together on approximately opposite sides using sonotrodes and cutting it in a single step is well-suited for multi-layer secondary separators. It is cost-effective and results in smaller seams 26 compared to the single-layer state-of-the-art, thus providing more space for coalescing media layers.

[0068] The secondary separator 20 can, for example, have the following features: be made of nonwovens, for example staple fiber fleece, spunbond, or meltblown, be made of the materials polyester, polyamide, glass or mixtures thereof, the air permeability of the entire secondary separator, determined for example according to DIN EN ISO 9237, can be significantly higher, for example by a factor of two, than the air permeability of the individual coalescence layers of the main separator 10 the thickness of the entire secondary separator, determined for example according to DIN EN ISO 9073-2, can be at least 3 mm, the thickness of the entire secondary separator 10 can be smaller than the thickness of the main separator 20 and the air permeability of the entire secondary separator, determined for example according to DIN EN ISO 9237, can be between 300 L / m 2 s and 4500 L / m 2 s at 200 Pa.

[0069] The multi-layer arrangement of the secondary separator 20 offers the following advantages: the separation efficiency of the secondary separator is significantly increased, the drainage properties are not negatively affected, which can be the case, for example, when using a single-layer secondary separator with a higher separation efficiency, with an overall larger radial thickness of the secondary separator, the drainage of the coalesced droplets is increased, and compared to the use of an individually adapted single-layer coalescing separator medium material, the multi-layer arrangement of a conventional coalescing separator medium material is economically better and also allows the individual adaptation of the secondary separator with regard to its separation efficiency.

[0070] The further exemplary embodiment of a coalescing separator insert 102 shown in Figures 6 and 7 differs from the coalescing separator insert 100 shown in Figures 1 to 5 in the direction of flow of the gas stream. In the coalescing separator insert 102 shown in Figures 6 and 7, the gas stream flows from the inside to the outside through the coalescing separator insert 102 in the use position.

[0071] List of reference symbols

[0072] 10 first coalescence separator body for separating liquid (droplets) from a gas stream, such as oil (droplets) from a (compressed) air stream, in particular main separator medium or main separator

[0073] 12 first support tube, in particular main separator support tube, for example, first central tube designed to support the first coalescing separator body 10

[0074] 20 further coalescence separator body, in particular post-separator medium body or post-separator body, comprising the further coalescence separator medium in ready-to-use, optionally cut, stacked, wound, folded, etc. form

[0075] 22 further support tube, in particular post-separator support tube, for example, further central tube designed to support the further coalescence separator body 20

[0076] 24 first coalescence separator medium layer of the further coalescence separator body 20, in particular first layer of the post-separator 20

[0077] 24a first element of the first coalescence separator medium layer 24, in particular first material web element of the first coalescence separator medium layer 24

[0078] 24b further element of the first coalescence separator medium layer 24, in particular further material web element of the first coalescence separator medium layer 24

[0079] 25 further coalescence separator medium layer of the further coalescence separator body 20, in particular further layer of the post-separator 20

[0080] 25a first element of the further coalescence separator medium layer 25, in particular first material web element of the further coalescence separator medium layer 25

[0081] 25b further element of the further coalescence separator medium layer 25, in particular further material web element of the further coalescence separator medium layer 25

[0082] 26 Connecting seam, in particular fixing seam, for example, a region connected by welding and / or gluing and / or sewing, of the overlapping regions of the respective elements 24a, 24b, 25a, 25b of the coalescence separator medium layers 24, 25

[0083] 30 drainage chamber arranged between the first coalescence separator body 10 and the further coalescence separator body 20 for removing oil separated by the first coalescence separator body 10

[0084] 50 End plate of the coalescing separator insert 100 of the coalescing separator 200 facing the cover 212

[0085] 52 End plate of the coalescing separator insert 100 of the coalescing separator 200 facing away from the cover 212

[0086] 100 Coalescence separator insert, in particular air deoiling element; first embodiment; see Figures 1 to 5

[0087] 102 Coalescence separator insert, further embodiment; see Figures 6 and 7

[0088] 200 coalescing separators, especially spin-on air oil separators

[0089] 210 Housing body of a pressure-resistant housing of the coalescing separator 200

[0090] 212 Cover of the pressure-resistant housing of the coalescing separator 200

[0091] 220 Raw gas inlet of the coalescence separator 200 230 Outlet for the separated liquid, e.g. for separated oil

[0092] 240 Clean gas outlet of the coalescing separator 200

[0093] 242 Clean gas outlet of the connection element, in particular nipple

[0094] 320 Raw gas supply of the connection element 330 Clean gas discharge of the connection element

[0095] 320 Raw gas supply of the connection element

[0096] 330 Clean gas supply of the connection element

[0097] D20 radial thickness of the further coalescing separator body 20

[0098] L Longitudinal axis of the further coalescing separator body 20 or central axis of the housing body 210

Claims

Claims 1 . Coalescence separator insert (100; 102) for separating liquid, in particular liquid droplets, for example oil, such as oil droplets, from a gas stream, in particular from an air stream, for example from a compressed air stream, wherein the gas stream flows from the outside inwards or from the inside outwards through the coalescence separator insert (100; 102) in the position of use of the coalescence separator insert (100; 102), comprising - at least one first coalescence separator body (10) operating according to the coalescence principle, comprising at least one first coalescence separator medium designed to separate liquid from the gas stream by means of the coalescence principle, which first coalescence separator medium is arranged around an air-permeable, cylindrical first support tube (12) designed to support the first coalescence separator body (10), and - at least one further coalescence separator body (20), comprising at least one further coalescence separator medium designed to separate liquid from the gas stream by means of the coalescence principle, arranged downstream of the first coalescence separator body (10) in the flow direction of the gas stream, which - is arranged concentrically to the first coalescing separator medium (10) and - is spaced radially from the first coalescing separator body (10) by a drainage space (30), characterized in that the further coalescing separator body (20) has at least two coalescing separator medium layers (24, 25), which are each arranged concentrically to the first coalescing separator medium (10), for example are arranged concentrically around a cylindrical, further support tube (22) designed to support the further coalescing separator body (20).

2. Coalescence separator insert according to claim 1, characterized in that each coalescence separator medium layer (24, 25) has at least two separate coalescence separator medium layer elements (24a, 24b, 25a, 25b) which are manufactured with a radial oversize and are shaped in such a way, in particular are arranged around the further support tube (22), that their respective side regions are arranged overlapping one another and are connected to one another by means of a connecting seam (26) extending along the longitudinal axis (L) of the further coalescence separator body (20).

3. Coalescence separator insert according to claim 1 or 2, characterized in that the respective elements (24a, 24b, 25a, 25b) of the coalescence separator medium layers (24, 25) are formed substantially symmetrically, in particular mirror-symmetrically, to one another, for example are arranged approximately symmetrically, in particular mirror-symmetrically, around the further support tube (22).

4. Coalescence separator insert according to claim 2 or 3, characterized in that the connecting seams (26) extending from the further coalescence separator body (20) into the drainage space (30) in the direction of the first coalescence separator body (10), at For example, the connecting seams (26) extend radially outwards in the case of a gas flow from the outside to the inside or radially inwards in the case of a gas flow from the inside to the outside.

5. Coalescence separator insert according to at least one of claims 2 to 4, characterized in that the connecting seams (26) are continuous.

6. Coalescence separator insert according to one of claims 2 to 5, characterized in that the connecting seams (26) extend over the entire length or at least over two-thirds of the length of the further coalescence separator body (20).

7. Coalescence separator insert according to one of claims 2 to 6, characterized in that the respective elements (24a, 24b, 25a, 25b) of the coalescence separator medium layers (24, 25) are arranged concentrically to the first coalescence separator medium (10) in such a way that the coalescence separator medium layer (24, 25) formed by them forms a closed cylindrical surface, for example are arranged around the further support tube (22) in such a way that the coalescence separator medium layer (24, 25) formed by them completely encloses the further support tube (22).

8. Coalescence separator insert according to one of claims 1 to 7, characterized in that the connecting seams (26) are manufactured by means of welding, in particular by means of ultrasonic welding.

9. Coalescence separator insert according to at least one of claims 1 to 8, characterized in that the respective coalescence separator medium layers (24, 25) have a uniform mechanical structure and are made of the same material.

10. Coalescence separator insert according to at least one of claims 1 to 9, characterized in that the coalescence separator insert (100; 102) is hollow-cylindrical and has on its respective end face an end plate (50, 52) designed to cover the end face, and the further support tube (22) is a plate-like element which is cylindrically bent about its longitudinal axis and whose shape is stabilized exclusively by a respective connection of the end faces of the support tube (22) and the end plates (50, 52) assigned to these end faces.

11. Coalescence separator (200) comprising a coalescence separator insert (100; 102) according to one of claims 1 to 9 and a pressure-resistant housing for receiving the coalescence separator insert (100; 102), wherein the pressure-resistant housing comprises - a cup-shaped housing body (210), - a cover designed to close the open end face of the housing body (210) - a raw gas inlet (220) designed to supply raw gas into the coalescence separator, which can be connected to a raw gas supply (320) of a connecting element of a machine and - a clean gas outlet (240) designed to discharge clean gas, which can be connected to a clean gas supply (330) of the connecting element.

12. Coalescence separator (200) according to claim 11, characterized in that - the raw gas inlet (220) and the clean gas outlet (240) are arranged on the cover (212), wherein - the clean gas outlet (240) has a central cylindrical recess in which a nipple (242) of a connecting element extending axially through the cover (212), in particular a tubular nipple, can be arranged, and - the lid (212) has at least one closure element which can be moved by means of a rotational movement of the lid (220) between an open position, in which the nipple (242) can be guided through the lid (212) along a central axis (L) of the cup-shaped housing body (210), and a closed position in which the nipple (242) is firmly connected to the lid (212).

13. A method for producing a coalescence separator insert (100; 102) for cleaning a gas stream which, in the use position of the coalescence separator insert (100; 102), flows from the outside to the inside or from the inside to the outside through the coalescence separator insert (100; 102), wherein (i) to provide a first coalescence separator body (10), at least one first coalescence separator medium designed to separate oil from air by means of the coalescence principle is arranged around a cylindrical, air-permeable first support tube (12) designed to support the first coalescence separator body (10), (ii) to provide a further coalescence separator body (20), at least one further coalescence separator medium designed to separate oil from air by means of the coalescence principle is arranged concentrically to the first coalescence separator medium (10), for example, around a cylindrical, air-permeable, further support tube (22) designed to support the further coalescence separator body (20), and (iii) the further coalescing separator body (20) is arranged concentrically to the first coalescing separator body (10) in such a way that the further coalescing separator body (20) is radially spaced from the first coalescing separator body (10) by a drainage space (30), characterized in that when providing the further coalescing separator body (20) as described in step (ii), at least two coalescing separator medium layers (24, 25) are each arranged concentrically to the first coalescing separator medium (10), for example, that when arranging the further coalescence separator body (20) on the further support tube (22) as described in step (ii), at least two coalescence separator medium layers (24, 25) are each arranged concentrically around the further support tube (22).

14. The method according to claim 13, characterized in that when providing the further coalescing separator body (20) as described in step (ii), at least two separate coalescing separator medium layer elements (24a, 24b, 25a, 25b) are arranged concentrically to the first coalescing separator medium (10) for each coalescing separator medium layer (24, 25), wherein the coalescing separator medium layer elements (24a, 24b, 25a, 25b) are manufactured with a radial oversize and are arranged overlapping one another at their respective radial side regions and are connected to one another by means of a joining technique, in particular by means of welding, for example ultrasonic welding.

15. Use of at least one coalescence separator insert (100; 102) designed according to at least one of claims 1 to 10 and / or a coalescence separator insert (100; 102) produced according to the method claim 13 or 14 and / or a coalescence separator (200) designed according to claim 11 or 12 - for de-oiling raw air in a compressed air system which is fed by an oil-lubricated connecting element of a machine, for example a compressor or a vacuum pump, wherein the compressed air system is advantageously further designed to return the de-oiled clean air and the separated oil to the connecting element, or - for deoiling crankcase gases of an internal combustion engine.

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