Coalescing separator insert, coalescing separator, and method of manufacturing coalescing separator insert

Abstract

A coalescing separator (200; 202) for purifying a gas stream, comprising a coalescing separator insert (100; 102), in which the coalescing separator insert (100; 102), a gas flow flows from outside to inside or from inside to outside through the coalescing separator insert (100; 102), a coalescing separator insert (100; the invention relates to a coalescer separator (100, 102) comprising:-at least one first coalescer separator part (10) comprising a coalescer separator medium located around a first gas-permeable cylindrical support tube (12) designed to support the first coalescer separator part (10), and-at least one additional coalescer separator part (20) comprising an additional coalescer separator medium (20) designed to support the first coalescer separator part (10), the additional coalescer separator medium (20) being arranged around a second gas-permeable cylindrical support tube (12) designed to support the second coalescer separator part (20). And an additional coalescing separator medium (20) positioned concentrically with the first coalescing separator part (10), for example wound around an additional support tube (22) designed to support the additional coalescing separator part (20), in which-the additional coalescing separator part (20) is wound at least partially into multiple layers, the additional coalescing separator part (20) has a winding structure and has two coalescing separator media layers (24, 25) which overlap in the flow direction of the gas flow at least in some regions, and the overlapping coalescing separator media layers (24, 25) are connected to one another in at least some regions for attaching the winding structure of the additional coalescing separator part (20).

Description

TECHNICAL FIELD

[0001] The invention relates to a coalescing separator insert, in particular an air oil separator element, according to the preamble of claim 1, and to a coalescing separator according to the preamble of claim 10.

[0002] The invention further relates to a process for manufacturing a coalescing separator insert, carried out according to the preamble of claim 13. BACKGROUND

[0003] Air oil separator elements are known, for example, from the printed publication EP 1 738 816 B1. Air to be purified flows through the air oil separator element from the outside to the inside or vice versa, wherein a multilayer primary separator, which functions according to the coalescence principle, separates and coalesces oil droplets from the air flowing through. The secondary aerosol exiting from the primary separator then flows through a further coalescing separator body, i.e. a column separator, in which the enlarged coalesced droplets are separated and discharged under the action of gravity.

[0004] For the manufacture of the column separator, a thick nonwoven fabric, for example a staple fiber nonwoven fabric, in particular a carded material, is usually used. The column separator is carried out as a single layer, as shown in the figures of EP 1 736 816 B1. The nonwoven fabric layer of the column separator carried out as a single layer is formed by being sewn or fused to a hose in a conventional manner and then pulled onto a support tube.

[0005] It is an object of the invention to further develop the aforementioned kind of coalescing separator insert, the aforementioned kind of coalescing separator and the aforementioned kind of process, such that the coalescing separator insert can be manufactured particularly easily and inexpensively and has a high variety of types, while still achieving a high separation degree. In particular, the column separator is to be able to be manufactured from a simple or inexpensive coalescing separator medium material. SUMMARY

[0006] This object is achieved by a coalescing separator insert having the features disclosed in claim 1, by a coalescing separator having the features disclosed in claim 10 and by a process having the features disclosed in claim 13. Advantageous embodiments of the invention and expedient further extensions of the features are subject matter of the respective subclaims.

[0007] The invention is therefore based on a further coalescing separator medium of a further coalescing separator body, which is carried out at least partially as a column separator - is wound in multiple layers, for example, around a further support tube, and - comprises at least two coalescing separator medium layers arranged overlapping relative to one another in the flow direction of the gas flow.

[0008] This multi-layer feature makes it possible to adapt the further coalescer separator body to the various requirements of the coalescer separator insert in a simple manner.

[0009] The further support tube is optional. In principle, the structure of the multi-layer coalescer separator body can also function without an additional or further support tube. The further support tube is a cylindrical hollow body which can be made of metal, plastic material or fabric, for example.

[0010] In order to fix the winding of the further coalescer separator body, the coalescer separator medium layers arranged overlapping relative to one another are at least partially connected to one another. In particular, at least the radially outer coalescer separator medium layers of the further coalescer separator body arranged overlapping comprise a fixing region which is connected to one another and is embodied for fixing the winding.

[0011] The overlapping arrangement or overlap advantageously amounts to at least one sixteenth of a complete winding of the winding of the outer coalescer separator medium layers of the further coalescer separator body, for example one eighth of a complete winding, preferably at least one fourth of a complete winding.

[0012] The inexpensive possibility of manufacturing the further coalescer separator body of the coalescer separator insert according to the application consists in winding a web of further coalescer separator medium and subsequently fixing the coalescer separator medium layers of the further coalescer separator body arranged overlapping. The fixing can be achieved by means of joining and / or gluing and / or stitching, for example. The fixing by means of joining technology, in particular fusion technology, can be produced particularly efficiently.

[0013] Advantageously, the coalescer separator medium layers arranged overlapping relative to one another are thus connected to one another with the aid of the fixing region provided by means of joining technology, in particular by means of fusion and / or gluing and / or stitching technology.

[0014] In comparison with the existing production of column separators, in which the column separator is formed as a hose, fixed and subsequently pulled onto a further support tube, the further coalescer separator body produced according to the application is a significantly more inexpensive type of production, in which the further coalescer separator medium is wound, for example onto a further support tube, and the overlapping regions are at least partially fixed relative to one another.

[0015] In addition, the further coalescer separator body produced according to the application can be adapted in a simple manner to different requirements with respect to the separation.

[0016] An advantageous embodiment of the application comprises, for example, a further coalescence separator body which is wound essentially as one layer, however, wherein at least one region of the further coalescence separator body is embodied as two layers and comprises overlapping layers of coalescence separator medium, which are at least partially connected to one another or fixed to one another.

[0017] In a further embodiment of the application, the entire further coalescence separator body is constructed from multiple layers. For example, a column separator can be formed from multiple layers of drainage material. This multiple-layer wound structure enables the column separator to be simply adapted to different size requirements and / or separation requirements.

[0018] An advantage of the application is therefore that the number of layers of the further coalescence separator body can be selected depending on the requirements regarding its separation performance. This makes it possible to manufacture different separator variants with the same coalescence separator material. In contrast, in the case of single-layer column separators known from the prior art, in order to manufacture different separator variants, a specific individually adapted coalescence separator material having a defined material thickness must be manufactured separately.

[0019] Due to the overlapping of the layers of the further coalescence separator body according to the application, the possibility is additionally provided to connect the overlapping coalescence separator medium layers of the further coalescence separator body to one another only locally. For example, the fixing regions can be spaced apart from one another along the longitudinal axis direction of the further coalescence separator body and separated from one another by the non-connected regions of the further coalescence separator body.

[0020] It is therefore possible, for example, to attach the respective layers of a column separator to one another by means of at least two fixing regions. In the prior art, on the other hand, a single-layer column separator medium is connected to a hose by means of a continuous connection seam. In the present application, it has surprisingly been found that even a discontinuous seam, i.e. an intermittent seam, is able to connect the layers of the further coalescence separator body to one another in a tightly sealing manner, such that the coalescence separator performance can be maintained unimpaired.

[0021] The application of intermittent seams with locally spaced fixing regions is particularly advantageous when the coalescence separator insert is manufactured by hand. In order to manufacture a continuous seam, the coalescence separator insert would have to be clamped into a device and aligned in order to position the seam in a straight line in the desired region. On the other hand, the local fixing regions can be applied manually without the need to clamp and align the coalescence separator insert. This results in the advantage that the column separator can be manufactured more efficiently.

[0022] In addition, the application of local fixing regions is significantly faster in hand manufacture than the implementation of a continuous seam. In this way, the hand manufacture of the coalescence separator insert can therefore be significantly facilitated.

[0023] In an advantageous embodiment of the application, the coalescer separator medium material, for example known from the prior art for a column separator, can be wound in two layers, for example around the further support tube in two layers. This is advantageous mainly when the separation degree requirement for the column separator is increased.

[0024] Furthermore, the multi-layer construction of the column separator enables it to be manufactured from coalescer separator medium, for example from non-woven material, which is formed more lightweight compared to the single-layer column separator medium known from the prior art and is provided in greater quantities and inexpensively for standard applications. For example, the further coalescer separator body can be formed from at least one coalescer separator medium, for example non-woven, in the form of a single (annular) flat web, including a grammage of up to 300 grams per square meter [g / m 2 ]. 2 , preferably 50 to 200 g / m 2 .

[0025] As a material for the further coalescer separator medium, for example, short-fiber non-woven and / or spun-bond non-woven and / or melt-blown non-woven can be used. Spun-bond non-woven is generally thin. The multi-layer construction enables thicker layers to be formed. Short-fiber non-woven provides a relatively thick, inexpensive layer, even in the case of several layers.

[0026] Furthermore, the material of the further coalescer separator medium can at least predominantly include polyester fibers, polyamide fibers or glass fibers or mixtures thereof.

[0027] Advantageously, the radial thickness of the further coalescer separator body is less than the radial thickness of the first coalescer separator body.

[0028] The thickness of all the coalescer separator medium layers of the further coalescer separator body of the advantageous embodiment of the application, for example determined according to the DIN EN ISO 9073-2 standard, i.e. at a contact pressure of 0.5 kPa, amounts to more than two millimeters [mm], in particular more than 2.5 mm, for example 4 mm to 10 mm.

[0029] In a further advantageous embodiment, the further coalescer separator body is designed such that the air permeability through the further coalescer separator body, for example determined according to DIN EN ISO 9237, amounts to 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] at a pressure difference of 200 Pascal [Pa].

[0030] In comparison, the air permeability of the first coalescing separator body, especially the main separator, is advantageously less than 400 l / m³. 2 s, for example 5-300 l / m 2 s.

[0031] Relatedly or alternatively, in an advantageous embodiment of the invention, the first coalescing separator body may be arranged (particularly wound) in multiple layers around the first support tube. The main separator may include multiple (e.g., 3 to 20) coalescing separator media layers, such as glass fiber paper layers.

[0032] The additional coalescing separator body is advantageously designed such that it includes a higher airflow permeability, particularly air permeability, than the corresponding layer of the first coalescing separator body. For example, a single layer of the main separator may include a reduced permeability, such as half the permeability of the column separator, compared to the entire column separator.

[0033] The present invention provides a coalescing separator insert and a coalescing separator with a column separator that is optimized in terms of separation, routing and manufacturing.

[0034] Finally, the present invention relates to the use of at least one coalescing separator insert of the aforementioned type and / or coalescing separator insert manufactured according to the aforementioned type of method and / or coalescing separator configured according to the aforementioned type. - Air-oil separation for use in compressed air or vacuum systems supplied by an oil-lubricated connector element, such as a machine (e.g., a compressor or vacuum pump), wherein the compressed air system is advantageously further configured to return the separated oil to the connector element, or - Air-oil separation for crankcase gases in internal combustion engines or reciprocating compressors.

[0035] For example, the coalescing separator insert of the present invention can be used in the following applications: - In spin-on coalescing separators or spin-on air-oil separators - In the compressor configured to compress air, - In compressors configured for oil separation, oil is returned to the oil circuit, and - In applications using oils with viscosity grades of VG32 and higher. Attached Figure Description

[0036] As mentioned above, there are various possibilities for designing and further developing the teachings of the invention in an advantageous manner. In this regard, on the one hand, reference is made to claim 1, and the dependent claims of claims 10 and 13; on the other hand, other configurations, features, and advantages of the invention will be discussed below, particularly by way of reference. Figures 1 to 8 The embodiments shown will be explained in more detail.

[0037] It shows: Figure 1 This is a schematic diagram of a first embodiment of a coalescing separator according to the present invention, wherein the coalescing separator insert is manufactured according to the method of the present invention; Figure 2 This is a schematic diagram of a second embodiment of a coalescing separator according to the present invention, wherein the coalescing separator insert is manufactured according to the method of the present invention; Figure 3 yes Figure 1 coalescing separator insert or Figure 2 A perspective view of the coalescing separator body of the coalescing separator insert; Figure 4 yes Figure 3 The cross-section of another coalescing separator body, in which various coalescing separator media layers are visible; Figure 5 yes Figure 3 A front view of the other coalescing separator body; Figure 6 yes Figure 3 A side view of the other coalescing separator body; Figure 7 This is another embodiment of a coalescing separator insert, which is manufactured according to the method according to the invention; and Figure 8 yes Figure 7 Longitudinal cross-sectional view of the coalescing separator insert.

[0038] exist Figures 1 to 8 The same or similar configurations, elements or features are identified by the same reference numerals in the accompanying drawings. Detailed Implementation

[0039] To avoid unnecessary repetition, the following explanations of the configuration, features, and advantages of the invention are (unless otherwise mentioned). Figure 1 The first embodiment of the coalescing separator 200 shown includes a first embodiment of the coalescing separator insert 100 according to the invention, and Figure 2 The second embodiment of the coalescing separator 202 according to the present invention is shown, and Figure 7 and 8Another embodiment of the coalescing separator insert 102 according to the present invention is shown.

[0040] Figure 1 A longitudinal section of a coalescing separator (i.e., a so-called spin-on air-oil separator 200) is shown. It is implemented to separate particles from a gas or gas mixture, particularly for separating aerosols formed from liquids from air. The liquid to be separated can be, for example, oil, fuel, hydraulic fluid, or coolant.

[0041] The coalescing separator 200 includes a cup-shaped pressure-stabilizing housing 210 in which an embodiment of the coalescing separator insert 100 configured according to the invention is received.

[0042] Cover 212 is used to close the open end face of the housing body 210. For supplying feed gas, coalescing separator 200 includes a feed gas inlet 220, which is connectable to a feed gas supply section of a connector element of a machine, such as a working machine, particularly a compressor, such as a compressed air compressor, or a screw compressor. For discharging purified clean gas, coalescing separator 200 includes a clean gas outlet 240, which is connectable to a clean gas supply section of a connector element.

[0043] exist Figure 1 In the spin-on air-oil separator 200 shown, a raw material gas inlet 220 and a clean gas outlet 240 are arranged at a cover 212. The clean gas outlet 240 includes a central cylindrical cutout in which a sleeve 242, particularly tubular in shape, can be arranged. The sleeve 242 extends axially through the cover 212. The sleeve 242 is associated with a connector element.

[0044] also, Figure 1 The cover 212 shown includes at least one closing element that can be moved between an open position and a closed position by rotational movement of the cover 212. In the open position, the sleeve 242 can be guided through the cover 212 along the central axis L of the cup-shaped housing body 210. In the closed position, the sleeve 242 is fixedly connected to the cover 212.

[0045] Figure 1 and Figure 2 The hollow cylindrical coalescing separator insert 100 shown includes end plates 50, 50', 52, 52' at its respective end faces for covering the end faces.

[0046] exist Figure 2In the illustration, the coalescing separator insert is shown within a cup-shaped housing body, specifically within a compressed air tank 210. It differs from the spin-on air-oil separator 200 in that the feed gas inlet 220 is located at the compressed air tank 210, the clean gas outlet 240 is located at the cover 212, and the end plate 50' facing the cover 212 includes a radially extending flange 54' configured to arrange the coalescing separator insert 100 within the pressure-stabilized housing 210.

[0047] Figures 1 to 6 The coalescing separator insert 100 shown is used to purify the air flowing from the outside to the inside through it. Figure 7 and 8 The coalescing separator 102 shown is flowed from the inside to the outside.

[0048] In this text, "outward-facing" refers to a direction that is perpendicular to the longitudinal axis of the coalescing separator insert and oriented radially outward from the longitudinal axis of the coalescing separator insert, i.e., towards the outer circumference of the coalescing separator insert. On the other hand, "inward-facing" refers to a direction that is perpendicular to the longitudinal axis of the coalescing separator insert and oriented radially inward from the outer circumference of the coalescing separator insert, i.e., towards the axis or center of the coalescing separator insert.

[0049] The main separator 10 of the coalescing separator insert 100, which operates according to the coalescing principle, is arranged around a breathable cylindrical support tube 12, for example, wound around the support tube 12 in multiple layers.

[0050] The main separator 10 may be constructed of, for example, glass fiber paper and include a substantial proportion of microglass fibers. For example, the main separator may comprise 5 to 20, for example, 15 individual layers. Each of these individual layers may include, for example, - The weight is approximately 60 to 200 grams per square meter (g / m²). 3 ), and / or - At a pressure of 200 Pascals, 5 l / m is determined according to DIN EN ISO 9237. 2 s to 300 l / m 2 air permeability of s, and / or, - For example, a thickness of approximately 0.4 mm to 1 mm as measured under a pressure of 10 kPa according to ISO 543.

[0051] Another coalescing separator body 20 (i.e., a column separator) that operates based on the coalescing principle is arranged radially inside the first coalescing separator body 10, i.e., the main separator 10 (comparatively). Figures 1 to 6 ) or radially outward (comparison) Figure 6 and7 The column separator 20 is arranged concentrically or coaxially with the main separator 10 and can be separated from the main separator 10 by a guide chamber 30. In addition to the function of discharging the separated droplets, the guide chamber 30 also has the function of preventing the coalescing separator media of the main separator 10 and the column separator 20 from getting stuck together when assembling the coalescing separator insert.

[0052] To withstand the pressure of the flowing air, the column separator 20 is arranged around an additional support tube 22. This winding structure is implemented in multiple layers and held together by local fixed areas 26, particularly by fusion points.

[0053] The fixed area 26 spans the length distribution of the column separator 20, particularly along the longitudinal axis L of the column separator, and is arranged axially spaced relative to each other.

[0054] Figures 3 to 6 A column separator 20 is shown, illustrating the partial fusion region 26 of the column separator 20 and the individual layers 24, 25.

[0055] Figure 2 The diagram shows column separator layers 24, 25 and main separator layer 10 arranged in series, with airflow extending from the outside to the inside. However, alternatively, in this invention, the airflow can also extend from the inside to the outside, wherein column separator layers 24, 25 are then radially closer to the longitudinal axis L of the coalescing separator insert 100 than the main separator 10.

[0056] Therefore, the guide layers 24 and 25 are always located downstream of the main separator 10. This means that for airflow guided from the outside to the inside, the guide layers 24 and 25 are closer to the longitudinal axis L of the coalescing separator insert 100; 102, and when the airflow is guided from the inside to the outside, the main separator 10 is closer to the longitudinal axis L of the coalescing separator insert 100.

[0057] The column separator 20 may include features such as: - Made of nonwoven fabric, such as short fiber nonwoven fabric, spunbond material or meltblown material; - Made of polyester, polyamide, glass, or mixtures thereof; - The air permeability of the entire column separator (as determined, for example, according to DIN EN ISO 9237) can be much higher than the air permeability of the individual coalescing layers of the main separator 10, for example, up to twice as high; - The thickness of the entire column separator (e.g., as determined according to DIN EN ISO 9073-2) can reach at least 3 mm; - The thickness of the entire column separator 10 can be less than the thickness of the main separator 20; and - The air permeability of the entire column separator (e.g., as determined according to DIN EN ISO 9237) can reach, for example, 300 l / m at 200 Pa. 2 s to 4500 l / m 2 Between s.

[0058] The multi-layer arrangement of the column separator 20 provides the following advantages: - The separation efficiency of the column separator is significantly increased; - The performance of the guide column will not be negatively affected. For example, when using a single-layer column separator with high separation, the performance of the guide column will be negatively affected. - The greater overall thickness of the column separator increases the conduction of coalescing droplets, which is particularly advantageous for larger coalescing separators; and - Compared to using a single-layer coalescing separator body with individual adaptation, the multi-layer arrangement of media material in conventional coalescing separators is more economical and also allows for individual adaptation of column separators in terms of their separation degree.

[0059] Figure 7 and 8 Another embodiment of the coalescing separator insert 102 shown differs from the one shown in terms of the airflow direction. Figures 1 to 6 The coalescing separator insert 100 is shown. Figure 7 and 8 In the coalescing separator insert 102 shown, in the use position, airflow passes through the coalescing separator insert 102 from the inside to the outside.

[0060] List of reference numerals 10. First coalescing separator body for separating liquid (droplets) from a gas flow, such as separating oil (droplets) from a (compressed) air flow, particularly the main separator medium body or main separator body, including coalescing separator media in operational form, optionally customized, stacked, wound, folded, etc. 12 First support tube, particularly the main separator support tube, for example, the first central tube configured to support the first coalescing separator medium 10. 20. Additional coalescing separator bodies, particularly column separator media bodies or column separator bodies, including additional coalescing separator media in operable, optionally customized, stacked, wound, folded, or other forms. 22 Additional support tubes, particularly column-type separator support tubes, such as additional central tubes for supporting the additional coalescing separator body 20. 24 The first coalescing separator medium layer of the additional coalescing separator body 20, particularly the first layer of the column separator 20 25. Additional coalescing separator media layers of the additional coalescing separator body 20, particularly additional layers of the column separator 20. 26. The fixed areas of the additional coalescing separator body 20, particularly the connecting areas, such as areas joined by means of fusion and / or adhesive and / or stitching techniques. A discharge chamber 30, arranged between the first coalescing separator body 10 and the other coalescing separator body 20, is used to discharge the oil separated by means of the first coalescing separator body 10. The end plates of the coalescing separator inserts 100 and 102 of the coalescing separator 200 facing the cover 212 (first embodiment, see...) Figure 1 ) 50' The end plate of the coalescing separator insert 100 of the coalescing separator 202 facing the cover 212 (see another embodiment). Figure 2 ) 52. The coalescing separator inserts 100, 102 of the coalescing separator 200 are located away from the end plate of the cover 212 (first embodiment, see...). Figure 1 ) 52' The end plate of the coalescing separator insert 100 of the coalescing separator 202 facing the cover 212 (see another embodiment). Figure 2 ) 54' Flange of the end plate 50 of the coalescing separator insert 100 100 coalescing separator insert, first embodiment; comparative Figures 1 to 6 102 Coalescing Separator Insert, Another Embodiment; Comparison Figure 7 and Figure 8 200 coalescing separator, particularly a spin-on air-oil separator, first embodiment, see Figure 1 202 Coalescing Separator, Second Embodiment, see Figure 2 210 coalescing separator 200 pressure stabilizing housing body 212 coalescing separator 200 pressure stabilizing housing cover 220 coalescing separator 200 feed gas inlet 230 is the outlet for the liquid being separated, for example, the outlet for the oil being separated. Clean gas outlet of 240 coalescing separator 200 Clean gas outlet for 242 connector components, especially the socket. Raw material gas supply section for 320 connector components Clean gas exhaust section of 330 connector element D20 The radial thickness of the other coalescing separator body 20 (comparison) Figure 4 ) L The longitudinal axis of the other coalescing separator body 20 or the central axis of the outer shell body 210.

Claims

1. A coalescing separator insert (100; 102) for separating liquids, particularly droplets, such as oil, from a gas stream, especially from an air stream, for example from a compressed air stream, wherein, In the usage position of the coalescing separator inserts (100; 102), airflow flows through the coalescing separator inserts (100; 102) from the outside to the inside or from the inside to the outside, including - At least one first coalescing separator body (10) comprising at least one first coalescing separator medium configured to separate liquid from a gas stream by means of a coalescing principle, and the first coalescing separator medium arranged around a permeable cylindrical first support tube (12) configured to support the first coalescing separator body (10), and - At least one additional coalescing separator body (20) comprising at least one additional coalescing separator medium configured to separate liquid from the gas flow by means of coalescence principle and arranged downstream of the first coalescing separator body (10) along the flow direction of the gas flow and concentrically arranged with the coalescing separator body (10), for example, wound around an additional support tube (22) configured to support the additional coalescing separator body (20). Its features - The additional coalescing separator medium is at least partially wound into multiple layers, for example, at least partially wound into multiple layers around the additional support tube (22), and the additional coalescing separator body (20) at least partially comprises at least two coalescing separator medium layers (24, 25), which are arranged to overlap each other relative to each other along the flow direction of the airflow. - The coalescing separator media layers (24, 25) arranged in an overlapping manner are at least partially connected to each other for securing the winding structure of the additional coalescing separator body (20).

2. The coalescing separator insert according to claim 1, characterized in that, In order to secure the winding structure of the additional coalescing separator body (20), the coalescing separator media layers (24, 25) arranged overlapping each other are connected to a fixed region (26) at at least two regions by means of connection technology, particularly by means of fusion and / or adhesive and / or stitching technology, wherein the fixed regions (26) are spaced apart from each other along the longitudinal axis (L) of the additional coalescing separator media body.

3. The coalescing separator insert according to claim 2, characterized in that, The fixed region (26) and the non-connected overlapping region of the coalescing separator media layer (24, 25) are arranged alternately along the longitudinal axis (L) of the other coalescing separator media body, forming an intermittent joint extending along the longitudinal axis (L) of the other coalescing separator media body.

4. The coalescing separator insert according to at least one of claims 1 to 3, characterized in that, The additional coalescing separator media (24, 25) comprise up to 300 grams per square meter (g / m²). 2 The weight, for example, 25 to 250 g / m³ 2 Preferably 50 to 200 g / m 2 The weight in grams.

5. The coalescing separator insert according to at least one of claims 1 to 4, characterized in that, The material of the additional coalescing separator media body (20) includes polyester fiber and / or polyamide fiber and / or glass fiber.

6. The coalescing separator insert according to at least one of claims 1 to 5, characterized in that, The radial thickness (D20) of the additional coalescing separator body (20) is less than the radial thickness of the first coalescing separator body (10).

7. The coalescing separator insert according to at least one of claims 1 to 6, characterized in that, The overlapping arrangement of the radially outer coalescing separator medium layer (25) of the additional coalescing separator body (20) reaches at least one-sixteenth, for example at least one-eighth, preferably at least one-quarter, of a full turn of the winding structure of the additional coalescing separator body (20).

8. The coalescing separator insert according to at least one of claims 1 to 7, characterized in that, The additional coalescing separator body (20) is configured such that, at a pressure of 200 Pascals, for example, as determined according to DIN EN ISO 9237, the airflow permeability, particularly the airflow permeability, through the additional coalescing separator body (20) reaches greater than 300 liters per square second (L / m²). 2 [s] and less than 4500 liters per square meter per second [l / m 2 s).

9. The coalescing separator insert according to at least one of claims 1 to 8, characterized in that... - The first coalescing separator body (10) is specifically implemented as a multi-layered structure, for example, arranged in multiple layers around the first support tube (12), particularly wound into multiple layers, and / or - The additional coalescing separator body (20) is configured such that it includes a higher airflow permeability, particularly an air permeability, than the corresponding layer of the first coalescing separator body (10).

10. A coalescing separator (200; 202) comprising a coalescing separator insert (100; 102) according to any one of claims 1 to 9 and a pressure-stabilized housing for receiving the coalescing separator insert (100; 102), wherein, The pressure-stabilizing housing includes - Cup-shaped outer shell body (210). - A cover (212), which is configured to close the opening end face of the outer shell body (210), - A feed gas inlet (220), configured to supply feed gas to the coalescing separator, and capable of connecting to the feed gas supply section of the machine's connector element, and - Clean gas outlet (240), which is configured to discharge clean gas and can be connected to the clean gas discharge section of the connector element.

11. The coalescing separator according to claim 10, wherein, - The raw material gas inlet (220) and the clean gas outlet (240) are arranged at the cover (212), wherein - The clean gas outlet (240) includes a central cylindrical cutout, in which a tubular sleeve (242) of the connector element can be arranged, the sleeve extending axially through the cover (212), and - The cover (212) includes at least one closing element that is movable between an open position and a closed position by means of the rotational movement of the cover (212). In the open position, the sleeve (242) is guided through the cover (212) along the central axis (L) of the cup-shaped outer shell body (210). In the closed position, the sleeve is fixedly connected to the cover (212).

12. The coalescing separator according to claim 10, wherein... - The raw material gas inlet (220) is located at the cup-shaped outer shell body (210). - The clean gas outlet (240) is located at the cover (212), and - The coalescing separator insert (100; 102) is implemented as a hollow cylindrical shape and includes end plates (50, 52; 50', 52') at its respective end faces, the end plates being configured to cover the end faces, wherein... The end plate (50; 50') facing the cover (212) includes a radially extending flange (54') configured to arrange the coalescing separator insert (100; 102) in the pressure stabilizing housing (210).

13. A method of manufacturing coalescing separator inserts (100, 102) for cleaning airflow, wherein, in a usage position of the coalescing separator inserts (100; 102), airflow flows through the coalescing separator inserts (100; 102) from the outside to the inside or from the inside to the outside, wherein (i) For providing a first coalescing separator body (10), at least one first coalescing separator medium is arranged around a cylindrical, ventilated first support tube (12), the first coalescing separator medium being configured to separate liquid, particularly droplets, such as oil, from an airflow, especially from an airflow, for example from a compressed airflow, by means of the coalescing principle; the first support tube (12) being configured to support the first coalescing separator medium; and (ii) For providing an additional coalescing separator body (20), at least one additional coalescing separator medium is arranged concentrically with the first coalescing separator body (10), for example around a cylindrical, ventilated additional support tube (22), the at least one additional coalescing separator medium being configured to separate liquid from the gas flow by means of coalescing principle, the additional support tube being configured to support the additional coalescing separator medium; Its features When arranging the additional coalescing separator body as described in step (ii) - The additional coalescing separator medium is wound such that the additional coalescing separator body (20) is at least partially implemented as multi-layered and includes at least two coalescing separator medium layers (24, 25) arranged to overlap each other relative to each other along the flow direction of the gas flow to be purified, and - In order to stabilize the winding structure of the additional coalescing separator body (20) arranged, for example, at the additional support tube (22), at least the regions of the coalescing separator media layers (24, 25) arranged opposite to each other are connected to each other.

14. The method according to claim 13, characterized in that, To stabilize, for example, the winding structure arranged at the additional support tube (22), several regions (26) of the additional coalescing separator body (20) are connected to each other, in particular by fusion, gluing or stitching, the several regions being distributed across the length of the additional coalescing separator body (20), in particular along the longitudinal axis (L) of the additional coalescing separator body (20), and arranged axially spaced relative to each other.

15. Use of at least one coalescing separator insert (100, 102) configured according to at least one of claims 1 to 9 and / or coalescing separator inserts (100; 102) produced by the method according to at least one of claims 13 to 15, and / or coalescing separator (200) configured according to at least one of claims 10 or 12, - Air-oil separation for use in compressed air systems or vacuum systems, where the compressed air is supplied via an oil-lubricated connector element, such as a machine, compressor, or vacuum pump. The compressed air system is advantageously further configured to return the separated oil to the connector element, or - Air-oil separation for crankcase gases in internal combustion engines or reciprocating compressors.

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