Coalescence separator insert, coalescence separator, and methods for manufacturing a coalescence separator insert and its use

Abstract

Coalescing separator insert (100; 102) for separating liquid, in particular liquid droplets, for example oil, from a gas stream, in particular from an air stream, for example from a compressed air stream, wherein the gas stream in the operating position of the coalescing separator insert (100; 102) flows from outside to inside or from inside to outside through the coalescing separator insert (100; 102), comprising - at least one first coalescing separator body (10) operating according to the coalescing principle, comprising at least one first coalescing separator medium designed for separating liquid from the gas stream by means of the coalescing principle, which is arranged around an air-permeable, cylindrical first support tube (12) designed to support the first coalescing separator body (10), and - at least one further coalescing separator body (20), comprising at least one further coalescing separator medium designed for separating liquid from the gas stream by means of the coalescing principle, arranged in the direction of flow of the gas stream downstream of the first coalescing separator body (10), which -- is arranged concentrically to the first coalescing separator medium (10) and -- is radially spaced from the first coalescing separator body (10) by a drainage space (30), wherein 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 concentrically around a cylindrical further support tube (22) designed to support the further coalescing separator body (20), characterized by the fact that Each coalescing separator medium layer (24, 25) has at least two separate coalescing separator medium layer elements (24a, 24b, 25a, 25b) which are manufactured with radial excess and are shaped in such a way, in particular arranged around the further support tube (22) such that their respective side areas are arranged overlapping each other and are connected to each other by means of a connecting seam (26) extending along the longitudinal axis (L) of the further coalescing separator body (20).

Description

Technical field

[0001] 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 10. The invention further relates to a method for manufacturing a coalescing separator insert according to the preamble of claim 12 and to its use according to claim 13. State of the art

[0002] Air oil removal elements are known, for example, from European Patent EP 1 738 816 B1. The air to be cleaned flows from the outside to the inside through the air oil removal element, whereby a multi-layered main separator operating on the coalescence principle separates and coalesces oil droplets from the flowing air. The secondary aerosol exiting the main separator then flows through a further coalescing separator body, a post-separator, whereby the enlarged, coalesced droplets are separated and drained away by gravity.

[0003] Heavy nonwovens, such as staple fiber nonwovens, especially carded materials, are typically used to manufacture the secondary separator. As shown in Figure EP 1 738 816 B1, the secondary separator is a single layer. The single layer of nonwoven material in the secondary separator is conventionally formed into a tube by sewing or welding and then pulled over the support tube.

[0004] A coalescing separator insert according to the preamble of claim 1 and a method according to the preamble of claim 12 is known from publication DE 10 2022 100 406 A1.

[0005] The invention is based on the objective of further developing a coalescing separator insert of the type mentioned above, a coalescing separator of the type mentioned above, and a method of the type mentioned above in such a way that the coalescing separator insert can be manufactured particularly simply and cost-effectively, yet still achieves a high separation efficiency. Above all, a space-saving, automated manufacturing process for the secondary separator is to be provided. Disclosure of the invention

[0006] This problem is solved by a coalescing separator insert with the features specified in claim 1, by a coalescing separator with the features specified in claim 10, and by a method with the features specified in claim 12. Advantageous embodiments and expedient further developments of the present invention are characterized in the respective dependent claims.

[0007] The present invention is therefore based on the fact that the further coalescing separator body, which is designed in particular as a secondary separator, has at least two coalescing separator medium layers, which are in particular annular in cross-section and are each arranged concentrically to the first coalescing separator medium. For example, the coalescing separator medium layers can be arranged concentrically around a cylindrical support tube designed to support the further coalescing separator body. The additional support tube is optional. In principle, the structure of the multilayer coalescing separator body can also function without an additional support tube. The additional support tube is a cylindrical hollow body, which can be made, for example, of metal, plastic, or fabric.

[0008] In other words, the additional coalescing separator body comprises at least one further filter medium, which is arranged in a ready-to-use form, possibly cut to size, stacked, wound, folded, etc., and provides at least two coalescing separator medium layers. The coalescing separator medium layers are arranged consecutively or overlapping in the direction of gas flow.

[0009] In the present invention, the entire coalescing separator body is therefore constructed in multiple layers. This multi-layered construction allows for easy adaptation of the coalescing separator body to different dimensional and / or separation requirements.

[0010] An advantage of the present invention is therefore that the number of layers of the secondary coalescing separator body can be selected according to the required degree of separation. This makes it possible to manufacture different separator variants using the same coalescing separator material. In contrast, with single-layer secondary separators known from the prior art, a specific, individually adapted coalescing separator material with a defined material thickness must be used to manufacture different separator variants.

[0011] The material for the secondary coalescing separator body can be, for example, a coalescing separator medium known from the prior art for secondary separators, arranged in multiple layers, for instance, around the secondary support pipe. This is particularly advantageous when higher requirements are placed on the separation efficiency of the secondary separator.

[0012] Furthermore, a multi-layered design of the secondary separator allows it to be manufactured from coalescing 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 secondary coalescing separator body can consist of at least one coalescing separator medium, such as a nonwoven fabric, with a basis weight of up to 300 grams per square meter (g / m²). 2 ), approximately 25 to 250 g / m² 2 preferably 50 to 200 g / m² 2 , be educated.

[0013] Manufacturing the additional coalescing separator body from several relatively thin layers of coalescing medium instead of one thick layer has the further advantage that the connecting seams occupy less radial space. This makes it possible to fill the saved space with additional layers of coalescing medium and thus increase the separation efficiency.

[0014] Suitable materials for the secondary coalescing separator body include staple fiber nonwovens, sheet bond nonwovens, and / or meltblown nonwovens. Sheet bond nonwovens are typically thin, but their multi-layered structure allows for the formation of thicker layers. Staple fiber nonwovens also produce relatively thick, cost-effective layers, even with just a few layers. Furthermore, the material of the secondary coalescing separator body can consist primarily of polyester, polyamide, or glass fibers, or mixtures thereof.

[0015] The thickness of all coalescing separator medium layers of the further coalescing 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.

[0016] A space-saving and cost-effective way to manufacture the further coalescing separator body of the coalescing separator insert according to the invention is therefore to - to arrange at least two separate coalescing separator medium layer elements, in particular coalescing separator medium web elements, which are manufactured with an excess in the circumferential direction, concentrically in such a way, for example, to arrange them around the further support tube, in particular to place them around it, so that their respective lateral end areas arranged perpendicular to the end face of the coalescing separator insert are arranged overlapping each other and - then to connect the overlapping lateral end areas to each other by means of a connecting seam extending along the longitudinal axis of the further coalescing separator body.

[0017] The web elements of each coalescing medium layer are arranged, for example, in a semicircular pattern, concentrically to the first coalescing medium (10) such that the coalescing medium layer (24, 25) they form creates a closed cylindrical surface. For example, the web elements of each coalescing medium layer can be arranged around the further support tube such that the coalescing medium layer they form completely encloses the further support tube in the circumferential direction.

[0018] Compared to the previous method of manufacturing a secondary separator, in which it is formed into a tube, fixed in place, and then pulled over the secondary support tube, the secondary coalescing separator body manufactured according to the present invention, in which the coalescing separator medium layer elements are, for example, placed around the secondary support tube and overlapping lateral end regions are fixed together, represents a significantly more cost-effective manufacturing method. Furthermore, the secondary coalescing separator body manufactured according to the present invention can be easily adapted to different separation requirements.

[0019] Furthermore, the multi-layered structure of the coalescing medium allows for further space savings compared to the seams. For example, several small seams require less radial space than a single thick seam. The space saved can be used to provide additional coalescing medium layers arranged successively in the direction of gas flow, thus increasing the separation efficiency. Due to the multi-layered coalescing medium layers arranged successively in the direction of gas flow, and the fact that each individual coalescing medium layer consists of at least two elements, the coalescing separator system of the present invention achieves a higher separation efficiency in the same space than a single-layer post-separator known from the prior art.

[0020] According to the invention, to manufacture the further 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 further support tube and connected to each other at overlapping side regions of the coalescing separator medium layer elements, in particular by welding. In other words, a multi-layered further 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 further coalescing separator body, for example, the downstream separator, during its manufacture and to select it according to the required separation efficiency of the further 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 known from the prior art, requires a specific coalescing separator medium material with a specifically defined thickness for each separator variant. Furthermore, this approach enables a cost-effective combination of at least two layers of different filter media.

[0021] In order to enable particularly cost-efficient storage of the material for the formation of the coalescing separator body, the material of the coalescing separator medium layers advantageously has a uniform mechanical structure and is made from the same coalescing separator medium.

[0022] The layers or strata of the coalescing separator body can also be made from 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 strata of the coalescing separator body can have a different material composition.

[0023] The connecting seams are advantageously produced using welding techniques, for example, ultrasonic welding. In the ultrasonic welding process, a sonotrode melts the coalescing separator medium material, causing the material fibers to bond together.

[0024] Advantageously, the interconnected, overlapping sections of the coalescing separator medium layer elements extend from the second coalescing separator body into the drainage chamber, in other words, towards the first coalescing separator body or downstream. The overlapping sections extend radially outwards when the gas flow is from the outside to the inside, and radially inwards when the gas flow is from the inside to the outside. The connecting seams thus project radially outwards or radially inwards. This has the advantage that the connecting seams serve to position the second coalescing separator body within the coalescing separator insert, for example, as spacers to the first coalescing separator body.This prevents the additional coalescing separator body from getting stuck or jammed on the first support pipe when being inserted into the coalescing separator insert and thus being damaged.

[0025] In this context, the term "outward" refers to a direction perpendicular to the longitudinal axis of the coalescing separator insert, extending radially outward from the insert's longitudinal axis, i.e., towards the outer circumference of the insert. Conversely, the term "inward" refers to a direction perpendicular to the longitudinal axis of the coalescing separator insert, extending radially inward from the outer circumference, i.e., towards the axis or center of the insert.

[0026] In order to enable the further coalescing separator body to be centered in the coalescing separator insert, the respective elements of the coalescing separator medium layers are advantageously designed symmetrically, in particular as mirror images, to each other, for example approximately symmetrically or essentially symmetrically around the further support tube.

[0027] To provide a particularly stable connection, the connecting seams are advantageously designed as continuous seams.

[0028] 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.

[0029] Surprisingly, it was found that sufficient dimensional stability of the additional support tube can be achieved simply by connecting it to end plates attached to its ends, for example, by adhesive bonding. Apart from the fixation to the end plates, no further fixing is required. Since the coalescing medium layers of the additional coalescing separator body are relatively light, they transmit only minimal pressure to the additional support tube. The additional support tube can therefore be manufactured simply, cost-effectively, and stably by bonding a plate-like element, bent cylindrically around its longitudinal axis (e.g., a sheet metal piece with air vents), to end plates at its ends. No further axially extending seam is necessary.A multi-layered construction of the post-separator consisting of several layers of relatively light coalescing separator media thus enables a particularly cost-effective and efficient construction of the post-separator support pipe.

[0030] In a further advantageous embodiment of the present invention, the further coalescing separator body is designed such that at a pressure of 200 Pascals [Pa], a gas flow permeability through the further coalescing separator body, determined for example according to DIN EN ISO 9237, is more than 300 liters per square meter second [l / m²]. 2 s] and less than 4500 liters per square meter second [l / m²] 2 s] is.

[0031] In comparison, the gas flow permeability of the first coalescing separator body, in particular the main separator, is advantageously less than 400 l / m². 2 s, for example 5-300 l / m 2 s.

[0032] In conjunction with or alternatively to this, in an advantageous embodiment of the present invention, the first coalescing separator medium can be arranged in multiple layers around the first support tube, in particular wound. The main separator can have several, for example 3 to 20, coalescing separator medium layers, such as layers of glass fiber paper.

[0033] The subsequent coalescing separator body is advantageously designed to have a higher gas flow permeability, particularly air permeability, than the individual 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 instance, half the permeability of the secondary separator.

[0034] The present invention provides a coalescing separator insert and a coalescing separator with a post-separator optimized with regard to separation, drainage and manufacturing.

[0035] 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 according to the method described above and / or a coalescing separator designed according to the type described above for the removal of oil from air in a compressed air or vacuum system which is supplied by a connection element of a machine, for example a compressor or a vacuum pump, which is, for example, oil-lubricated, wherein the compressed air system is advantageously further configured to return the separated oil to the connection element.

[0036] 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 according to the method described above and / or a coalescing separator designed according to the type described above for the removal of oil from crankcase gases of an internal combustion engine.

[0037] 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, whereby the oil is returned to the oil circuit, and - in applications with oils of viscosity class VG32 and more viscous. Brief description of the drawings

[0038] As discussed above, there are various ways to advantageously elaborate and further develop 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 described below, inter alia, with reference to the Fig. 1 to 5 illustrated examples are explained in more detail.

[0039] It shows: Fig. 1 in longitudinal section view 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; Fig. 2 in partially cutaway view the coalescing separator from Fig. 1 ; Fig. 3 a detailed view of the coalescing separator Fig. 1; Fig. 4 in perspective view of the further coalescing separator body of the coalescing separator insert made of Fig. 1 ; Fig. 5 in cross-sectional view of the further coalescing separator body made of Fig. 4, in which the different coalescing separator medium layers and the outward-extending connecting seams are shown; Fig. 6 a further embodiment of a coalescing separator insert manufactured according to the method of the present invention; and Fig. 7 in longitudinal section view the coalescing separator insert from Fig. 6.

[0040] Identical or similar designs, elements, or features are found in the Fig. Numbers 1 to 7 are labelled with identical reference symbols. embodiment(s) of the invention

[0041] Fig. Figure 1 shows a longitudinal section of a coalescing separator, specifically a so-called spin-on air oil separator, 200. This separator is designed for coalescing the separation of particles from a gas or gas mixture, in particular for coalescing the separation of aerosols formed from liquid in air. The liquid to be separated can be, for example, oil, fuel, hydraulic fluid, or coolant.

[0042] The coalescing separator 200 has a cup-shaped, pressure-resistant housing body 210 in which an embodiment of a coalescing separator insert 100 designed according to the present invention is accommodated.

[0043] A cover 212 serves to close the open end face 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 connection element of a machine, for example, a machine tool, in particular a compressor, for example, a compressed air compressor, such as a screw compressor. For discharging the cleaned gas, the coalescing separator 200 has a clean gas outlet 240, which can be connected to a clean gas supply 330 of the connection element.

[0044] At the in Fig. 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, the clean gas outlet 240 having a central cylindrical recess in which a nipple 242, extending axially through the cover 212 and in particular tubular, can be arranged. The nipple 242 is associated with the connection element.

[0045] Furthermore, the in Fig. 1 The lid 212 shown 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 passed 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.

[0046] To cover its respective front faces, the in the Fig. 1 to 5 shown hollow cylindrical coalescing separator insert 100 each with an end disc 50, 52.

[0047] The in the Fig. The embodiment of a coalescing separator insert 100 shown in Figures 1 to 5 according to the present invention is primarily designed for use in smaller coalescing separators, especially in spin-on separators. Such gas flow coalescing separators 200 can, for example, have a gas flow rate of up to 8 standard cubic meters per minute at an operating pressure of 7 bar.

[0048] Alternatively to the one in the Fig. In the embodiment shown in Figures 1 to 3, the coalescing separator could also be arranged in a compressed air vessel (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 vessel, 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.

[0049] The one in the Fig. The coalescing separator insert 100 shown in figures 1 to 5 serves to clean air flowing through it from the outside to the inside. The one in the Fig. 6 and Fig. The coalescing separator insert 102 shown in image 7 is flowed through from the inside to the outside.

[0050] A main separator 10 of the coalescing separator insert 100, operating according to the coalescing principle, is arranged around an air-permeable, cylindrical supporting tube 12, approximately wrapped several layers around the supporting tube 12.

[0051] The main separator 10, for example, can be made of glass fiber paper and contain a significant proportion of microglass fibers. For example, the main separator 5 can have 20, approximately 15, individual layers. Each of these layers can, for example, - a weight of approximately 60 to 200 grams per square meter (g / m²) 3 ) and / or - at a pressure of 200 Pascals [Pa], an air permeability of 5 l / m, determined for example according to DIN EN ISO 9237 2 s to 300 l / m 2 s, approximately 30 l / m 2 s to 300 l / m 2 s, and / or - have a thickness of approximately 0.4 mm to 2 mm, measured, for example, at a pressure of 10 kPa in accordance with ISO 543.

[0052] Radial within (cf. Fig. 1 to 5) or radially outside (see Fig. 6 and Fig. 7) A further coalescing separator body 20, namely a secondary separator body 20, operating according to the coalescing principle, is arranged in a first coalescing separator body 10, namely a secondary separator body 20, which operates according to the coalescing principle. This secondary separator body 20 is arranged concentrically or coaxially to the main separator body 10 and may be spaced apart from the main separator body 10 by a drainage chamber 30. In addition to draining the separated droplets, the drainage chamber 30 serves to prevent the coalescing separator media of the main separator body 10 and the secondary separator body 20 from becoming entangled when the coalescing separator insert is assembled.

[0053] 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.

[0054] The post-separator 20 has at least two successive post-separator layers 24, 25 in the direction of flow of the gas stream, each of which is arranged concentrically around the post-separator support tube 22.

[0055] The downstream separator layers 24, 25 and the main separator layer 10 are in Fig. 1 is shown in a series arrangement in which the airflow runs from the outside to the inside. Alternatively, in the present invention, the airflow can also run from the inside to the outside, in which case the downstream separator layers 24, 25 would be radially closer to the longitudinal axis L of the coalescing separator insert 100; 102 than the main separator 10.

[0056] The drainage layers 24, 25 are therefore always located downstream of the main separator 10. This means that with a gas flow from outside to inside, the drainage layers 24, 25 are closer to the longitudinal axis L of the coalescing separator insert 100; 102, and with a gas flow from inside to outside, the main separator 10 is closer to the longitudinal axis L of the coalescing separator insert 100; 102.

[0057] Each secondary separator layer 24, 25 in turn has two opposing material web elements 24a, 24b, 25a, 25b. These material web elements 24a, 24b, 25a, 25b are arranged in a semicircular shape around the secondary separator support pipe 22 such that the secondary separator layer 24, 25 formed by them completely encloses the secondary separator support pipe 22.

[0058] In summary, the data in the Fig. Figures 1 to 5 of the secondary separator 20 show four material webs 24a, 24b, 25a, 25b running towards the central tube 22. Two material webs at a time are placed around the central tube from opposite sides and then welded and cut by two sonotrodes at approximately opposite points. In the present invention, the layers of the secondary separator are thus connected to the further support tube 22, for example by welding.

[0059] The approximately opposite seams 26 serve as spacers and for centering the secondary separator 20 in the air de-oiling element 100 (cf. Fig. 2) In the prior art, where the post-separator layers are held together only by means of a correspondingly thicker connecting seam, the post-separator tends to sit eccentrically in the coalescing separator insert.

[0060] The process of placing material around the central tube and welding it together on approximately opposite sides using sonotrodes, and cutting it in the same step, can be readily integrated into multi-layer post-separators. It is cost-effective, results in smaller seams compared to the single-layer state of the art, and thus provides more space for coalescing medium layers.

[0061] The post-separator 20 can, for example, have the following features: - be made of nonwovens, for example staple fiber nonwovens, spunbond, or meltblown, - be made of materials such as polyester, polyamide, glass or mixtures thereof, - the air permeability of the entire downstream 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 coalescing layers of the main separator 10 - the thickness of the entire post-separator, determined for example according to DIN EN ISO 9073-2, can be at least 3 mm, - the thickness of the entire downstream separator 10 can be smaller than the thickness of the main separator 20 and - the air permeability of the entire post-separator, determined for example according to DIN EN ISO 9237, can range from 300 L / m 2 s and 4500 L / m 2 s at 200 Pa.

[0062] The multi-layered arrangement of the post-separator 20 offers the following advantages: - the separation efficiency of the post-separator is significantly increased, - the drainage properties are not negatively affected, which can be the case, for example, when using a single-layer post-separator with a higher separation efficiency, - With a greater overall radial thickness of the post-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 more economical and also allows for individual adaptation of the post-separator with regard to its separation efficiency.

[0063] The in the Fig. 6 and Fig. Figure 7, another embodiment of a coalescing separator insert 102 shown, differs from the one shown in the Fig. The coalescing separator insert 100 shown in Figures 1 to 5 is controlled by the direction of gas flow. In the case of the Fig. 6 and Fig. In the coalescing separator insert 102 shown in 7, the gas flow in the operating position flows from inside to outside through the coalescing separator insert 102. Reference symbol list 10 First coalescing separator body for separating liquid (droplets) from a gas stream, for example oil (droplets) from a (compressed) air stream, in particular main separator medium or main separator 12 first support pipe, in particular main separator support pipe, for example for supporting the first coalescing separator body 10 designed, first intermediate pipe 20 further coalescing separator bodies, in particular post-separator medium bodies or post-separator bodies, comprising the further coalescing separator medium in operational, if necessary cut, stacked, wound, folded, etc. form 22 further support pipe, in particular post-separator support pipe, for example for supporting the further coalescing separator body 20, further intermediate pipe 24 first coalescing separator medium layer of the further coalescing separator body 20, in particular first layer of the post-separator 20 24a first element of the first coalescing separator medium layer 24, in particular first material web element of the first coalescing separator medium layer 24 24b further element of the first coalescing separator medium layer 24, in particular further material web element of the first coalescing separator medium layer 24 25 further coalescing separator medium layer of the further coalescing separator body 20, in particular further layer of the post-separator 20 25a first element of the further coalescing separator medium layer 25, in particular first material web element of the further coalescing separator medium layer 25 25b further element of the further coalescing separator medium layer 25, in particular further material web element of the further coalescing separator medium layer 25 26 Joining seam, in particular fixing seam, area joined, for example by means of the technique of welding and / or gluing and / or sewing, of the overlapping arranged areas of the respective elements 24a, 24b, 25a, 25b of the coalescing separator medium layers 24, 25 30 Drainage chamber arranged between first coalescing separator body 10 and the further coalescing separator body 20 for the removal of oil separated by means of the first coalescing separator body 10 50 End disc of the coalescing separator insert facing the lid 212 100 of the coalescing separator 200 52 End disc of the coalescing separator insert 100 facing away from the lid 212 of the coalescing separator 200 100 coalescing separator insert, in particular air oil separator element; first embodiment; cf. Fig. 1 to 5 102 Coalescing separator insert, further embodiment; see also. Fig. 6 and Fig. 7 200 coalescing separators, in particular spin-on air oil separators 210 Housing body of a pressure-resistant housing of the coalescing separator 200 212 Cover of the pressure-resistant housing of the coalescing separator 200 220 Raw gas inlet of the coalescing separator 200 230 Outlet for the separated liquid, for example for separated oil 240 Clean gas outlet of the coalescing separator 200 242 Clean gas outlet of the connection element, in particular nipple 320 Raw gas supply of the connection element 330 Clean gas discharge of the connection element 320 Raw gas supply of the connection element 330 Clean gas supply of the connection element D20 radial thickness of the further coalescing separator body 20 L Longitudinal axis of the further coalescing separator body 20 or central axis of the housing body 210

Claims

[1] Coalescing 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 in the operating position of the coalescing separator insert (100; 102) flows from outside to inside or from inside to outside through the coalescing separator insert (100; 102), comprising - at least one first coalescing separator body (10) operating according to the coalescing principle, comprising at least one first coalescing separator medium designed for separating liquid from the gas stream by means of the coalescing principle, which is arranged around an air-permeable, cylindrical first support tube (12) designed to support the first coalescing separator body (10), and - at least one further coalescing separator body (20), comprising at least one further coalescing separator medium designed for separating liquid from the gas stream by means of the coalescing principle, arranged in the direction of flow of the gas stream downstream of the first coalescing separator body (10), which -- is arranged concentrically to the first coalescing separator medium (10) and -- is radially spaced from the first coalescing separator body (10) by a drainage space (30), wherein 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 concentrically around a cylindrical further support tube (22) designed to support the further coalescing separator body (20), characterized by , that Each coalescing separator medium layer (24, 25) has at least two separate coalescing separator medium layer elements (24a, 24b, 25a, 25b) which are manufactured with radial excess and are shaped in such a way, in particular arranged around the further support tube (22) such that their respective side areas are arranged overlapping each other and are connected to each other by means of a connecting seam (26) extending along the longitudinal axis (L) of the further coalescing separator body (20). [2] Coalescing separator insert according to claim 1, characterized by , that the respective elements (24a, 24b, 25a, 25b) of the coalescing separator medium layers (24, 25) are symmetrical, in particular mirror-image, to each other, for example symmetrically, in particular mirror-image, arranged around the further support tube (22). [3] Coalescing separator insert according to claim 1 or 2, characterized by, that the connecting seams (26) extending from the further coalescing separator body (20) into the drainage space (30) in the direction of the first coalescing separator body (10), for example the connecting seams (26) extend radially outwards in the case of a gas flow from outside to inside or radially inwards in the case of a gas flow from inside to outside. [4] Coalescing separator insert according to at least one of claims 1 to 3, characterized by , that the connecting seams (26) are continuous. [5] Coalescing separator insert according to one of claims 1 to 4, characterized by that the connecting seams (26) extend over the entire length or at least over two thirds of the length of the further coalescing separator body (20). [6] Coalescing separator insert according to one of claims 1 to 5, characterized by, that the respective elements (24a, 24b, 25a, 25b) of the coalescing separator medium layers (24, 25) are arranged concentrically to the first coalescing separator medium (10) such that the coalescing separator medium layer (24, 25) formed by them forms a closed cylindrical shell surface, for example, are arranged around the further support tube (22) such that the coalescing separator medium layer (24, 25) formed by them completely encloses the further support tube (22). [7] Coalescing separator insert according to one of claims 1 to 6, characterized by , that the connecting seams (26) are manufactured using the technique of welding, in particular using the technique of ultrasonic welding. [8] Coalescing separator insert according to at least one of claims 1 to 7, characterized by that the respective coalescing separator medium layers (24, 25) have a uniform mechanical structure and are made of the same material. [9] Coalescing separator insert according to at least one of claims 1 to 8, characterized by , that - the coalescing separator insert (100; 102) is hollow cylindrical and has an end disk (50, 52) on its respective end face designed to cover the end face, and - the further support tube (22) is a plate-like element curved cylindrically around its longitudinal axis, the shape of which is stabilized exclusively by a respective connection of the end faces of the support tube (22) and the end discs (50, 52) assigned to these end faces. [10] coalescing separator (200) comprising a coalescing separator insert (100; 102) according to one of claims 1 to 8 and a pressure-resistant housing for receiving the coalescing separator insert (100; 102), wherein the pressure-resistant housing comprises - a cup-shaped housing body (210), - a cover (212) designed to close the open end face of the housing body (210) - a raw gas inlet (220) designed for supplying raw gas into the coalescing separator, which can be connected to a raw gas supply (320) of a connection element of a machine and - a clean gas outlet (240) designed for the discharge of clean gas, which can be connected to a clean gas supply (330) of the connecting element. [11] Coalescing separator (200) according to claim 10, characterized by , 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 passed 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). [12] Method for manufacturing a coalescing separator insert (100; 102) for cleaning a gas stream which, in the operating position of the coalescing separator insert (100; 102), flows from the outside to the inside or from the inside to the outside through the coalescing separator insert (100; 102), wherein (i) to provide a first coalescing separator body (10) at least one first coalescing separator medium designed for separating oil from air by means of the coalescing principle is arranged around a cylindrical, air-permeable first support tube (12) designed for supporting the first coalescing separator body (10), (ii) to provide a further coalescing separator body (20), at least one further coalescing separator medium designed for separating oil from air by means of the coalescing principle is arranged concentrically to the first coalescing separator medium (10), for example around a cylindrical, air-permeable further support tube (22) designed for supporting the further coalescing separator body (20), and (iii) the further coalescing separator body (20) is arranged concentrically to the first coalescing separator body (10) such that the further coalescing separator body (20) is radially spaced from the first coalescing separator body (10) by a drainage space (30), wherein, in the provision of the further coalescing separator body (20) as described in step (ii), at least two coalescing separator medium layers (24, 25) are arranged concentrically to the first coalescing separator medium (10), for example, that in the arrangement of the further coalescing separator body (20) on the further support tube (22) as described in step (ii), at least two coalescing separator medium layers (24, 25) are arranged concentrically around the further support tube (22), characterized by , 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 radial excess and are arranged overlapping each other at their respective radial side areas and are joined together by means of a joining technique, in particular by means of the technique of welding, such as ultrasonic welding. [13] Use of at least one coalescing separator insert (100; 102) designed according to at least one of claims 1 to 9 and / or a coalescing separator insert (100; 102) produced according to the method of claim 12 and / or a coalescing separator (200) designed according to claim 10 or 11 - for the oil removal of raw air in a compressed air system that is supplied by an oil-lubricated connection element of a machine, for example a compressor or a vacuum pump, wherein the compressed air system is advantageously further designed to return the oil-free clean air and the separated oil to the connection element, or - for the removal of oil from crankcase gases of an internal combustion engine.

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