DK154007B

DK154007B - Liquid-air-separator

Info

Publication number: DK154007B
Application number: DK414480A
Authority: DK
Inventors: Ting C Tao
Original assignee: Air Maze Corp
Priority date: 1980-10-01
Filing date: 1980-10-01
Publication date: 1988-10-03
Also published as: DK414480A; DK154007C

Description

DK 154007 BDK 154007 B

Opfindelsen omhandler en væske/luft-separator af den i krav l's indledning angivne art, især til indsætning i en kompressors luftudstødningssystem.The invention relates to a liquid / air separator of the kind specified in the preamble of claim 1, especially for insertion into a compressor air exhaust system.

5 I de konventionelle separatorer sker der et stort trykfald ved passagen af fluidet igennem filtermaterialet, og filteret må være meget stort for at besidde en tilstrækkelig stor luftgennemstrømningskapacitet til anvendelse i forbindelse med kompressorer. Endvidere har de 10 kendte filtre en tendens til at komprimeres under påvirkning af de ret høje lufttryk i kompressorens udstødningssystem, hvilket nedsætter funktionsevnen af kompressorsystemet .In the conventional separators, a large pressure drop occurs as the fluid passes through the filter material, and the filter must be very large to have a sufficiently large air flow capacity for use with compressors. Furthermore, the 10 known filters tend to be compressed under the influence of the rather high air pressures in the exhaust system of the compressor, which reduces the performance of the compressor system.

15 Pra US patentskrift nr. 4 050 237 kendes en dugblæser-konstruktion til fjernelse af væsken fra luftarter med koncentriske ringformede filterelementer, anbragt inden i et ydre cylinderformet gasgennemtrængeligt hus mellem endedæksler til dannelse af et første og et andet fil-20 treringstrin. Det første, radialt yderste, trin består af polyurethanskumlag, og det andet trin består af to krumme aluminiumgitterlag med en mellemliggende glasfibermåtte.15 U.S. Patent No. 4,050,237 discloses a dew blower structure for removing the liquid from gases with concentric annular filter elements, housed within an outer cylindrical gas-permeable housing between end caps to form a first and a second filtration step. The first, radially outermost, step consists of polyurethane foam layers, and the second step consists of two curved aluminum lattice layers with an intermediate fiberglass mat.

25 Separatoren ifølge opfindelsen er ejendommelig ved den i krav l's kendetegnende del angivne konstruktion.The separator according to the invention is characterized by the construction according to the characterizing part of claim 1.

Det første filtertrin tjener til at agglomerere olietågen til store dråber, der fjernes af det andet trin, og 30 der opnås en god virkningsgrad med et minimalt trykfald.The first filter stage serves to agglomerate the oil mist into large droplets removed by the second stage and a good efficiency is obtained with a minimum pressure drop.

Opfindelsen forklares nærmere nedenfor i forbindelse med tegningen, hvor: 35 2The invention is explained in more detail below in connection with the drawing, in which: 35 2

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fig. 1 er et delsnit igennem en første udførelsesform for en separator ifølge opfindelsen, fig. 2 er et delsnit igennem en typisk konventionel se-5 parator, fig. 3 er et lodret snit igennem en del af en anden udførelsesform for separatoren ifølge opfindelsen, og 10 fig. 4 viser en detalje af en vandret installleret separator ifølge opfindelsen.FIG. 1 is a partial section through a first embodiment of a separator according to the invention; FIG. 2 is a partial section through a typical conventional separator; FIG. 3 is a vertical section through part of another embodiment of the separator according to the invention; and FIG. 4 shows a detail of a horizontally installed separator according to the invention.

Pig. 1 viser en separator 1 ifølge opfindelsen, hvis hovedopgave er at fjerne olietåge fra den trykluft, der 15 udstødes fra en kompressors udløb.Pig. 1 shows a separator 1 according to the invention, whose main task is to remove oil mist from the compressed air that is ejected from the outlet of a compressor.

Separatoren 1 har to trin. Det første filtertrin 4 er anbragt op imod ydervæggen 2 af separatoren 1. Det andet trin er et dobbelt filtertrin med to filterelementer 6 20 og 10 anbragt op imod indervægge 8 op 12 af separatoren 1. Separatorvæggene 2, 8 og 12 består fortrinsvis af perforerede stålcylindre.Separator 1 has two steps. The first filter stage 4 is arranged against the outer wall 2 of the separator 1. The second stage is a double filter stage with two filter elements 6 20 and 10 arranged against the inner walls 8 up 12 of the separator 1. The separator walls 2, 8 and 12 preferably consist of perforated steel cylinders. .

Det første filtertrin 4 har et sammenfoldet flerlags ag-25 glomeratorlegeme. Det ydre lag 20 af agglomeratorlegemet er et enkelt lag af et metalmaskegitter, og det samme gælder det indre lag 30. Det centrale lag 24 af agglomeratorlegemet er et enkelt lag af en fiberglasfolie.The first filter stage 4 has a folded multilayer agglomerator body. The outer layer 20 of the agglomerator body is a single layer of a metal mesh grating, and the same applies to the inner layer 30. The central layer 24 of the agglomerator body is a single layer of a fiberglass film.

Imellem fiberglasfolien 24 og de hosliggende metalmaske-30 gitre 20 og 30 er der anbragt mellemliggende lag 22, 26 og 28 af et fiberglasmateriale. Et enkelt lag 22 af fiberglasmateriale er anbragt imellem fiberglasfolien 24 og det ydre gitter 20, og to lag 26 og 28 af fiberglasmateriale er anbragt imellem fiberglasfolien 24 og det indre 35 3Between the fiberglass foil 24 and the adjacent metal mask 30 grids 20 and 30, intermediate layers 22, 26 and 28 of a fiberglass material are disposed. A single layer 22 of fiberglass material is disposed between fiberglass foil 24 and outer grille 20, and two layers 26 and 28 of fiberglass material are disposed between fiberglass foil 24 and interior 35 3.

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gitter 30. Fiberglasfolien 24 er fortrinsvis ret tynd, og fiberglasmaterialerne 22, 26 og 28 er væsentligt tykkere. De sidste kan anvendes uden den centrale folie 24.lattice 30. The fiberglass foil 24 is preferably quite thin and the fiberglass materials 22, 26 and 28 are substantially thicker. The latter can be used without the central foil 24.

5 Denne agglomeratorstruktur har vist sig at yde en stor modstand imod kompressionskræfter udøvet af den trykluft t der passerer igennem filteret. Desuden bevirker denne agglomerator 4 kun et lille tryktab i den luft, der passerer igennem filteret, og fremmer virksomt den 10 nedenfor beskrevne agglomerationsvirkning.This agglomerator structure has been found to provide a great resistance to compressional forces exerted by the compressed air t passing through the filter. In addition, this agglomerator 4 causes only a small loss of pressure in the air passing through the filter and effectively promotes the agglomeration effect described below.

Filterelementerne 6 og 10 i det andet trin har to lag 31 og 33 af filtermateriale anbragt imellem vinylbetrukne glasfiberduge 32, 34, 36 og 38. Det yderste filterele-15 ment 6 fastholdes imod inderfladen af agglomeratoren 4 af en perforeret stålcylinder 8 i koncentrisk afstand fra ydervæggen 2 af separatoren 1. Det indre filterelement 10 er fastgjort op imod indervæggen 12 af separatoren 1. Et cylinderformet mellemrum 35 optræder imellem 20 indre og ydre filterelementer 6 og 10.The filter elements 6 and 10 of the second stage have two layers 31 and 33 of filter material disposed between vinyl-coated glass fiber cloths 32, 34, 36 and 38. The outer filter element 6 is held against the inner surface of the agglomerator 4 by a perforated steel cylinder 8 at a concentric distance. the outer wall 2 of the separator 1. The inner filter element 10 is fixed against the inner wall 12 of the separator 1. A cylindrical gap 35 occurs between 20 inner and outer filter elements 6 and 10.

Filterelementerne 6 og 10 separerer olie fra luft som nærmere beskrevet ovenfor. Det andet trin fremmer dræningen af olien. Den dobbelte fiberkonstruktion ifølge 25 opfindelsen muliggør endvidere en nedsættelse af totaldimensionen af separatoren 1 for en given luftstrømningskapacitet.The filter elements 6 and 10 separate oil from air as described above. The second step promotes the drainage of the oil. The dual fiber structure of the invention furthermore enables a reduction in the total dimension of the separator 1 for a given air flow capacity.

Store radiale kræfter optages af den svære cylinder 8.Large radial forces are absorbed by the heavy cylinder 8.

30 Lagene 31 i det ydre filterelement 6 er omhyllet stramt omkring den perforerede stålcylinder 8, og lagene 33 i det indre filterelement 10 er omhyllet omkring den indre stålcylinder 12. Denne konstruktion tilvejebringer en effektiv filtreringsevne med et minimalt tryktab i den 35 4The layers 31 of the outer filter element 6 are wrapped tightly around the perforated steel cylinder 8, and the layers 33 of the inner filter element 10 are wrapped around the inner steel cylinder 12. This construction provides an efficient filtering capability with a minimum pressure loss in the 4

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luft, der passerer igennem separatoren 1.air passing through the separator 1.

Den på fig. 2 viste separator ifølge den kendte teknik har tre radialt koncentrisk beliggende perforerede stål-5 cylindre 42, 46 og 50. Det ydre filtertrin har et antal lag 44 af et fiberglasmateriale anbragt imellem koncentrisk beliggende glasduge 41 og 43. Det ydre filterelement fastholdes imellem den ydre og den centrale stålcylinder 42 og 46. Det indre filterelement har et antal 10 lag 48 af et fiberglasmateriale fastholdt imellem en vi-nylbetrukket glasdug 45 og den indre perforerede stålcylinder 50. Denne separator 40 har et mindre olieladet overfladeareal end den sammenfoldede separator 1 ifølge opfindelsen. Derfor kan separatoren 1 gøres meget mindre 15 end den kendte separator 40 og stadig behandle den samme luftstrømningskapacitet. Endvidere har lagene af fiber-glasmaterialeomhylninger 44 og 48 i den kendte separator 40 en tendens til lettere at komprimeres og kompakteres end det agglomererende filterlegeme i separatoren 1 20 ifølge opfindelsen ved påvirkning af luftstrømninger med højt tryk. Når fiberglasmaterialelagene 44 og 48 i den kendte separator 40 komprimeres, optræder der et væsentligt trykfald, hvilket undgås i separatoren 1 ifølge opfindelsen.The FIG. 2 of the prior art separator has three radially concentrically perforated steel cylinders 42, 46 and 50. The outer filter stage has a plurality of layers 44 of a fiberglass material disposed between concentrically located glass cloth 41 and 43. The outer filter element is held between the outer and the central steel cylinder 42 and 46. The inner filter element has a plurality of 10 layers 48 of a fiberglass material retained between a vinyl-coated glass cloth 45 and the inner perforated steel cylinder 50. This separator 40 has a smaller oil-laden surface area than the folded separator 1 of the invention. . Therefore, the separator 1 can be made much smaller than the known separator 40 and still process the same air flow capacity. Furthermore, the layers of fiber glass material envelopes 44 and 48 of the prior art separator 40 tend to be more easily compressed and compacted than the agglomerating filter body of the separator 1 20 of the present invention under the influence of high pressure air flows. When the fiberglass material layers 44 and 48 of the prior art separator 40 are compressed, a significant pressure drop occurs, which is avoided in the separator 1 according to the invention.

2525

Fig. 3 og 4 viser andre udførelsesformer for opfindelsen og andre monteringsunderstøtninger for separatoren ifølge opfindelsen. 1 35FIG. 3 and 4 show other embodiments of the invention and other mounting supports for the separator according to the invention. 1 35

Fig. 3 har et enkelt andet trin 10 understøttet imellem en perforeret indervæg 12 og dugen 32. Monteringsenden 64 er forsynet med pakringe 84. Et rør 90 udtrækker olie fra det indre af filteret. Stropper 93 holder delene samlet.FIG. 3, a single second step 10 is supported between a perforated inner wall 12 and the tablecloth 32. The mounting end 64 is provided with packing rings 84. A tube 90 extracts oil from the interior of the filter. Straps 93 hold the parts together.

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Fig. 4 viser en vandret montering af en separatorenhed.FIG. 4 shows a horizontal mounting of a separator unit.

En (ikke vist) tank omfatter en svær (ikke vist) cylinder med en påsvejst endeplade 144. En separatorenhed indføres igennem en stor øverste åbning i endepladen 5 144/ og en dækselplade 146 boltes til endepladen med indlagte tætsluttende filterflanger.A tank (not shown) comprises a heavy (not shown) cylinder with a welded end plate 144. A separator unit is inserted through a large upper opening in the end plate 5 144 / and a cover plate 146 is bolted to the end plate with inset sealing filter flanges.

Gennem en (ikke vist) central åbning i dækselpladen 146 strømmer der oliefri tør komprimeret luft ud igennem et 10 ikke vist forbindelsesrør. En olieåbning 150 nær ved bunden af dækselpladen 146 er forbundet med et rør, gennem hvilket der strømmer olie til indløbet af en kompressor. Olien opsamles på et lavtliggende sted nær ved dækselpladen 146 og nær ved åbningen 150, når den dryp-15 per ned fra et kort rør 152, som er indskudt igennem et endedæksel 158 imellem det første og det andet trin 4 og 6.Through an (not shown) central opening in the cover plate 146, oil-free dry compressed air flows through a connection pipe (not shown). An oil opening 150 near the bottom of the cover plate 146 is connected to a pipe through which oil flows to the inlet of a compressor. The oil is collected at a low position near the cover plate 146 and near the opening 150 as it drips down from a short tube 152 which is inserted through an end cap 158 between the first and second steps 4 and 6.

Separatorvæggene 2, 8, 12 kan bestå af aluminium. Fil-20 termaterialet kan bestå af formstof, og de ydre filterlag kan være viklet tættere end de indre lag.The separator walls 2, 8, 12 may consist of aluminum. The film material may consist of resin, and the outer filter layers may be more closely wound than the inner layers.

25 1 3525 1 35

Claims

A liquid / air separator comprising a plurality of concentric annular filter elements disposed within an outer cylindrical gas-permeable housing between two end caps and forming a first filter stage adapted to agglomerate fine liquid droplets entrained in the air flowing into the separator. larger liquid droplets, 10 and a second filter stage adapted to separate these larger droplets from air flowing from the separator, characterized in that the first filter stage (4) comprises at least two layers (22, 30) carrying gas permeable walls (20). , 26) of a fiberglass material having an intermediate fiberglass layer (24) to form a sandwich structure folded into a waveform and the second filter step being disposed within the first stage and comprising a secondary and a tertiary filter element (6 and 10, respectively) radially separated and supported by a secondary and a tertiary cylindrical gas-permeable wall (8, 12), respectively, against tr removed from the gas flowing through the filter element.

Separator according to claim 1, characterized in that the first filter step comprises an extra layer (28) of fiberglass material disposed downstream of the two layers (22, 26). 1 35

Separator according to claim 1 or 2, characterized in that the secondary and tertiary filter element (6, 10) each comprises two layers (31, 33) of a filter material disposed between a vinyl-coated fiberglass canvas material (32, 34, 36, 38). DK 154007 B

Separator according to claims 1-3, characterized in that the filter material layers (31) in the secondary filter element (6) are wound more tightly than the filter material layers (33) in the tertiary filter element (10).

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