WO2000001461A1 - Liquid separator for a liquid injected compressor - Google Patents
Liquid separator for a liquid injected compressor Download PDFInfo
- Publication number
- WO2000001461A1 WO2000001461A1 PCT/SE1999/001028 SE9901028W WO0001461A1 WO 2000001461 A1 WO2000001461 A1 WO 2000001461A1 SE 9901028 W SE9901028 W SE 9901028W WO 0001461 A1 WO0001461 A1 WO 0001461A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- separator
- coarse
- oil
- tubular
- liquid
- Prior art date
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 4
- 230000002745 absorbent Effects 0.000 claims 1
- 239000002250 absorbent Substances 0.000 claims 1
- 239000004744 fabric Substances 0.000 description 7
- 239000003507 refrigerant Substances 0.000 description 7
- 230000035699 permeability Effects 0.000 description 5
- 238000009834 vaporization Methods 0.000 description 3
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 2
- 229920003235 aromatic polyamide Polymers 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010964 304L stainless steel Substances 0.000 description 1
- 241000531908 Aramides Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000271 Kevlar® Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000004761 kevlar Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/026—Lubricant separation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
Definitions
- the present invention relates to a liquid separator arrangement for use with a liquid injected compressor, particularly, but not exclusively, to an oil separator arrangement for an oil-injected helical screw compressor.
- the liquid separator arrangement has two separation stages that include an inner, coarse separator and a fine separator which is positioned radially outwards of the coarse separator and through which gas that contains liquid droplets passes radially outwards via an intermediate free space in which the gas flow is able to stop slightly prior to flowing into the fine separator.
- Oil carry-over values as low as 0 to 0.6 percent have been measured with an oil separator arrangement of this construction.
- Figures 1 is a longitudinal sectional view of a selected exemplifying embodiment of an inventive oil separator arrangement mounted on the high pressure end- wall of a helical screw compressor, part of the compressor also being shown in longitudinal section; and
- Figure 2 is a graph which shows the percentage of oil carried over from the oil separator shown in Figure 1, as a function of the vaporisation temperature of the refrigerant.
- a high pressure part of a helical screw cooling compressor is designated 1 and its high pressure end-wall is designated 2.
- the end-wall 2 has mounted thereon a housing 3 which houses an oil separator arrangement 4 constructed in accordance with the invention.
- the compressor 1 has an outlet passageway or duct 5 positioned centrally opposite an inlet opening 6 leading to the oil separator arrangement 4.
- the oil separator arrangement 4 has a vertical, first end-wall 7 which includes an inlet opening 6 in the end thereof proximal to the compressor 1.
- One end of a first perforated sleeve 12 is fastened, e.g. welded, to the periphery of the opening 6.
- the centre line of the sleeve 12 is essentially horizontal.
- the other end of the first sleeve 12 is closed by a disc-shaped member 13.
- a second perforated sleeve 14 is placed outwardly of a ⁇ concentrically with the first sleeve 12.
- the end of the sleeve 14 that faces towards the compressor is inserted in a circular groove in the end- wall 7.
- a coarse separator 9 is provided in the space formed between said perforated sleeves 12, 14, said sleeves forming walls that hold the coarse separator in place.
- the illustrated liquid separator arrangement 4 also includes a fine separator 10 disposed between mutually spaced and mutually concentric perforated sleeves, a third sleeve 16 and a fourth sleeve 17, outside the third sleeve 16.
- the fine separator 10 including said sleeves 16 and 17 is located outwardly of the coarse separator 9 and in spaced relationship therewith.
- a cavity 11 is defined between the coarse separator 9 and the fine separator 10. The first ends of sleeves 16 and 17 are received in grooves in the first end- wall 7.
- the liquid separator 4 also includes a second end-wall 8, which is parallel and concentrical with the disc plate 13.
- the end- wall 8 includes grooves into which the second, third and fourth sleeves 14, 16 and 17 are inserted and held in place by a bolt and nut joint, 15, said bolt being inserted through openings in the second end-wall 8 and in the centre of the disc plate 13. All of the four perforated sleeves 12, 14, 16 and 17 have a perforated area that exceeds 50 percent of the sleeve area.
- the coarse separator 9 may be a spun wire net, e.g. a "Becoil Demister Mech:
- the net is applied in a number of layers that together provide a thickness of 2.5 to 3.5 cm.
- the net is wound with a hardness or compactness such that the calculated rate of gas flow will not be less than 0.2 metre per second and not higher than 0.5 metre per second.
- This filter constitutes a first part of the oil separating process and separates the major part of the oil flow (80-90 %) from the system.
- the net layer is held in place with the intended degree of compactness by the first and the second sleeve 12 and 14, these sleeves having a perforated area which exceeds 50 percent of the area of the sleeve surface.
- the holes in the sleeves have a diameter of 8- 10 mm.
- the fine separator 10 which is held in place by the third sleeve 16 and the fourth sleeve 17, is comprised of a porous fabric made of oil-resistant and oil-repelling fibres.
- the fabric is wound loosely around the third perforated sleeve 16, to a thickness of 6-8 mm.
- the layer of fibre fabric In order to be able to drain-off oil separated in the coarse separator 9 and also to form an effective separator for the finely divided oil remaining in the fluid flow exiting from the coarse separator 9, it is necessary for the layer of fibre fabric to have a determined porosity, which is determined by the weight per unit area of the fabric layer.
- the fabric layer will have a weight per unit area of 130-170 grams per square metre of fabric having a thickness of 1 millimetre.
- said material may comprise a polyamide fibre material or some corresponding material.
- the material used will conveniently be a carbon fibre or aramide fibre material, preferably a para-aramide material (KEVLAR, trade name for para-amide fibres, owner DU PONT, U.S.A.).
- refrigerant e.g. R134a (tetrafluoroethane, CF 3 CFH 2 ) containing oil in larger or small droplets, down to mist- size, exits from the outlet passageway 5 of the compressor and enters through the inlet opening of the oil separator arrangement 4 at a rate of flow of about 6 metres per second, or at a higher rate. Because the disc plate 13 at the end of the first sleeve 12 opposite the inlet opening 6 prevents continued flow parallel with the sleeve, the refrigerant flow will change direction and continue radially outwards through the openings or perforations in the first sleeve 12.
- R134a tetrafluoroethane, CF 3 CFH 2
- the refrigerant will flow radially through the coarse separator 9 and out through the second sleeve 14. Most of the oil droplets will fasten on the coarse separator net and on the surfaces of the sleeves, and will run down therefrom and leave the coarse separator 9 through the lowermost openings or perforations in the outer tube or sleeve 14.
- the oil-depleted refrigerant continues to flow radially outwards through the fine separator 10, where most of the remaining oil is separated from the fluid flow.
- the sleeve 14 thus functions as a collecting surface for the oil that is extracted by the coarse separator and that runs down from the lower part thereof. The oil that drains from the coarse separator is collected in the lower part of the cavity 11 outside the sleeve 14.
- the cavity 11 has a radial extension of about 1.5 to 2.5 cm.
- the oil that runs from the coarse separator fills a bottom segment of the cavity 11, corresponding to 60 to 90°, and then drains through the outer, fine separator 10.
- the inner limitation of the fine separator forms the outer limitation of the cavity or space 11.
- Oil separated by the coarse separator 9 and collecting on the lowermost part of the fine separator 10 is drained through the lower segmental part of the fibre cloth, this oil-draining segmental part of said separator 10 corresponding to from 60 to 90° of the cylindrical periphery of said separator 10, while the remaining 270-300° of the periphery forms the oil separating area of the fine separator over which remaining, finely-divided oil is extracted from the refrigerant.
- the oil level In order for the oil separator arrangement to operate effectively and to achieve a balance with respect to gas throughflow and oil throughflow, the oil level must only take-up at most 25 percent of the area of the fine separator 10, i.e. the segment may not exceed 90°. Neither will the rate of gas flow through the fine separator 10 be less than 0.1 metre per second.
- the numerical values can be varied depending on different operating conditions, and all or some of the sleeves 12, 14 and 16, 17 can be replaced with rigid net structures of corresponding permeability.
- the permeability of such a rigid net structure may be greater than the permeability of the perforated sleeves, although in this case the greater permeability of said rigid net structure will conveniently be compensated for by a lower permeability of the enclosed coarse-separating and fine-separating materials respectively.
- the separator sleeves may be a cross-sectional shape other than circular, such as a square shape, a pentagonal shape, and so on.
- the sleeves may also taper.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Compressor (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99933332A EP1123150B1 (en) | 1998-07-07 | 1999-06-11 | Liquid separator for a liquid injected compressor |
JP2000557900A JP4580552B2 (en) | 1998-07-07 | 1999-06-11 | Liquid separator for liquid injection compressor |
DE69931945T DE69931945T2 (en) | 1998-07-07 | 1999-06-11 | LIQUID SCREENING DEVICE FOR COMPRESSORS WITH LIQUID INJECTION |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9802432-6 | 1998-07-07 | ||
SE9802432A SE512435C2 (en) | 1998-07-07 | 1998-07-07 | Liquid separator for a liquid-injected compressor, in particular an oil separator for an oil-injected screw rotor compressor |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2000001461A1 true WO2000001461A1 (en) | 2000-01-13 |
WO2000001461A8 WO2000001461A8 (en) | 2000-02-24 |
Family
ID=20411990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1999/001028 WO2000001461A1 (en) | 1998-07-07 | 1999-06-11 | Liquid separator for a liquid injected compressor |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1123150B1 (en) |
JP (1) | JP4580552B2 (en) |
KR (1) | KR100638686B1 (en) |
DE (1) | DE69931945T2 (en) |
DK (1) | DK1123150T3 (en) |
SE (1) | SE512435C2 (en) |
WO (1) | WO2000001461A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11408655B2 (en) * | 2019-03-06 | 2022-08-09 | Sumitomo Heavy Industries, Ltd. | Oil separator, filter element, and compressor for cryocooler |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112833093A (en) | 2019-11-25 | 2021-05-25 | 斯凯孚公司 | Bearing arrangement |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2063097A (en) * | 1979-11-13 | 1981-06-03 | Orion Machinery Co Ltd | Filter for filtering compressed air |
WO1981003207A1 (en) * | 1980-05-02 | 1981-11-12 | Hydrovane Compressor | Rotary compressors |
GB2120122A (en) * | 1982-05-14 | 1983-11-30 | Marshall D A G | Air filter element |
US4478054A (en) * | 1983-07-12 | 1984-10-23 | Dunham-Bush, Inc. | Helical screw rotary compressor for air conditioning system having improved oil management |
US4662190A (en) * | 1985-12-10 | 1987-05-05 | Tischer James C | Integral slide valve-oil separator apparatus in a screw compressor |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3452334B2 (en) * | 1994-06-02 | 2003-09-29 | 株式会社荏原製作所 | Oil separator |
JPH10137505A (en) * | 1996-11-07 | 1998-05-26 | Kiichi Watanabe | Oil purifying device for air compressor system |
JPH1172363A (en) * | 1997-08-29 | 1999-03-16 | Osaka Gas Co Ltd | Vortex flowmeter |
JPH11128633A (en) * | 1997-10-31 | 1999-05-18 | Osaka Gas Co Ltd | Filter and its production |
JP2007296431A (en) * | 2006-04-28 | 2007-11-15 | Hitachi Metals Ltd | Metal porous sintered member filter |
-
1998
- 1998-07-07 SE SE9802432A patent/SE512435C2/en not_active IP Right Cessation
-
1999
- 1999-06-11 DK DK99933332T patent/DK1123150T3/en active
- 1999-06-11 KR KR1020007014891A patent/KR100638686B1/en not_active IP Right Cessation
- 1999-06-11 WO PCT/SE1999/001028 patent/WO2000001461A1/en active IP Right Grant
- 1999-06-11 EP EP99933332A patent/EP1123150B1/en not_active Expired - Lifetime
- 1999-06-11 JP JP2000557900A patent/JP4580552B2/en not_active Expired - Fee Related
- 1999-06-11 DE DE69931945T patent/DE69931945T2/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2063097A (en) * | 1979-11-13 | 1981-06-03 | Orion Machinery Co Ltd | Filter for filtering compressed air |
WO1981003207A1 (en) * | 1980-05-02 | 1981-11-12 | Hydrovane Compressor | Rotary compressors |
GB2120122A (en) * | 1982-05-14 | 1983-11-30 | Marshall D A G | Air filter element |
US4478054A (en) * | 1983-07-12 | 1984-10-23 | Dunham-Bush, Inc. | Helical screw rotary compressor for air conditioning system having improved oil management |
US4662190A (en) * | 1985-12-10 | 1987-05-05 | Tischer James C | Integral slide valve-oil separator apparatus in a screw compressor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11408655B2 (en) * | 2019-03-06 | 2022-08-09 | Sumitomo Heavy Industries, Ltd. | Oil separator, filter element, and compressor for cryocooler |
Also Published As
Publication number | Publication date |
---|---|
DE69931945T2 (en) | 2007-02-01 |
EP1123150A1 (en) | 2001-08-16 |
JP4580552B2 (en) | 2010-11-17 |
SE512435C2 (en) | 2000-03-20 |
DE69931945D1 (en) | 2006-07-27 |
JP2003520919A (en) | 2003-07-08 |
WO2000001461A8 (en) | 2000-02-24 |
KR20010071633A (en) | 2001-07-28 |
DK1123150T3 (en) | 2006-10-16 |
SE9802432L (en) | 2000-01-08 |
EP1123150B1 (en) | 2006-06-14 |
KR100638686B1 (en) | 2006-10-27 |
SE9802432D0 (en) | 1998-07-07 |
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