WO2002084124A1 - Unite compresseur a vis avec systeme de refroidissement d'huile incorpore - Google Patents

Unite compresseur a vis avec systeme de refroidissement d'huile incorpore Download PDF

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Publication number
WO2002084124A1
WO2002084124A1 PCT/IT2002/000239 IT0200239W WO02084124A1 WO 2002084124 A1 WO2002084124 A1 WO 2002084124A1 IT 0200239 W IT0200239 W IT 0200239W WO 02084124 A1 WO02084124 A1 WO 02084124A1
Authority
WO
WIPO (PCT)
Prior art keywords
separation chamber
screw compressor
shell
accordance
compressor unit
Prior art date
Application number
PCT/IT2002/000239
Other languages
English (en)
Inventor
Alessandro Bulfon
Original Assignee
Tm.C. S.P.A. Termomeccanica Compressori
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from ITFI20010067 external-priority patent/ITFI20010067A1/it
Priority claimed from ITFI20020014 external-priority patent/ITFI20020014A1/it
Application filed by Tm.C. S.P.A. Termomeccanica Compressori filed Critical Tm.C. S.P.A. Termomeccanica Compressori
Priority to EP02728044A priority Critical patent/EP1379786B1/fr
Priority to DE60203272T priority patent/DE60203272T2/de
Priority to AT02728044T priority patent/ATE291175T1/de
Publication of WO2002084124A1 publication Critical patent/WO2002084124A1/fr

Links

Classifications

    • 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
    • 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
    • F04C29/04—Heating; Cooling; Heat insulation

Definitions

  • the present invention concerns a screw compressor unit with an oil separator and a heat exchanger incorporated in one and the same body.
  • Description of the prior art In the screw compressors known to prior art the functions of separating the lubricating oil from the compressed gas and cooling the oil by means of a heat exchange process are normally performed by physically distinct devices that are connected with each other by external piping to form a unit . This situation results in a substantial encumbrance and weights and requires for an interconnecting pipe system to link the various components, so that the joints implied by said system can also generate problems of losses of oil and/or gas.
  • the heat exchanger means for cooling the oil are located within a shell delimiting the chamber for separating the oil from the compressed gas and then for collecting the separated oil. More particularly, the heat exchanger means comprise a heat exchange surface defined by a plurality of axial channels provided on said shell and in series communication with each other, a forced circulation of cooling air flowing over said heat exchange surface
  • the shell housing the gas-oil separation unit is connected to the body of the compressor by coupling means consisting of a connection body and contains also filtering means, more particularly a coalescence-type de-oiling cartridge, to remove any residual trace of oil from the compressed gas.
  • filtering means more particularly a coalescence-type de-oiling cartridge
  • said coalescence-type de-oiling cartridge is mounted on the outside of the connection body and can therefore be easily removed and replaced without there being any need for dismantling the external cover and the gas-oil separation unit.
  • the communication passages between adjacent pairs of the axial channels for cooling the oil are provided at the end of the shell, that is to say, on the connection body and the external cover or, alternately, formed directly within the ends of the shell.
  • the forced air circulation is generated by means of a cooling fan operated either directly by the compressor motor or, preferably, provided with an autonomous motor and controlled by an oil temperature sensor, said fan being situated downstream of the compressor body and the shell .
  • FIG. 2 shows another longitudinal section through the screw compressor unit in accordance with the invention shown in Figure 1 taken along line II -II;
  • FIG. 3 illustrates three cross sections of the screw compressor unit in accordance with the invention taken along lines III-III, IV-IV and V-V of Figure 1 ;
  • - Figure 6 shows a longitudinal section through another embodiment of the screw compressor unit in accordance with the invention;
  • the reference number 1 indicates a motor, an electric motor for example, connected to a compressor body 2 delimiting a compression chamber 2a within which there are arranged two screw rotors 3 that suck the gas to be compressed, for example air from the environment, through a valve 8 and a filter 9 and then compress it by virtue of their rotation, discharging the compressed gas entraining lubricating oil into an outlet chamber 10.
  • a motor an electric motor for example, connected to a compressor body 2 delimiting a compression chamber 2a within which there are arranged two screw rotors 3 that suck the gas to be compressed, for example air from the environment, through a valve 8 and a filter 9 and then compress it by virtue of their rotation, discharging the compressed gas entraining lubricating oil into an outlet chamber 10.
  • compressor body 2 On the side opposite to motor 1, compressor body 2 is fixed to a first face of a connection body 4 that is provided with a passage 4a to allow outlet chamber 10 of compressor body 2 to communicate with a duct 11 arranged in the axial direction along a cylindrical shell 5 delimiting a separation chamber 14 and at its free end is closed by an external cover 6.
  • Said duct 11 communicates with a duct 12 that extends diametrically within external cover 6, from which, in its turn, there extends in an axial direction, but in an eccentric position, yet another duct 12a that leads into a substantially bell-shaped separator element 13a arranged axially and in an eccentric position inside cylindrical shell 5 and within separation chamber 14. Given ' the speed at.
  • the oil collected in chamber 14 flows through a duct 20, which can be seen only in Figure 5, to a series of longitudinal channels 21 provided on the wall of shell 5 that communicate with each other in series through U- shaped junction ducts 22 situated in connection body 4 and external cover 6. As it passes through said ducts, the oil exchanges heat with an air stream forced to circulate in contact with the outer surface of shell 5 where channels 21 are provided.
  • the air stream is generated by a fan 23, which is arranged coaxially with and operated by motor 1 inside a tubular body 26 that is coaxial with the compressor and contains also motor 1, compressor body 2 and cylindrical shell 5.
  • a thermostatic valve 25 assures a direct connection between chamber' 14 and filter 24, which enables the oil to avoid the run through channels 21 and thus accelerates its warm-up process.
  • the entire unit is mounted on a support 7 like the one illustrated in Figure 1.
  • FIGS 6 to 9 illustrate a second embodiment of the screw compressor in accordance with the invention and use the same reference numbers to indicate compressor components that are present also in the embodiment illustrated by Figures 1 to 5.
  • the side of compressor body 2 opposite to motor 1 is attached to a first face of connection body 4 in which there is provided passage 4a that enables outlet chamber 10 to communicate with a duct 11 of a gas-oil separator unit generically indicated by the reference number 13.
  • Said separation unit 13 is arranged within the cylindrical shell 5 that is attached to a second face of connection body 4 located on the opposite side of compressor body 2 and substantially parallel to the first face.
  • Gas-oil separator unit 13 comprises duct 11 that extends within separation chamber 14 delimited by cylindrical shell 5 and leads into substantially bell- shaped separator element 13a located in the upper part of separation chamber 14 and aligned in parallel with the axis of shell 5.
  • the inlet of outlet duct 15 for the de- oiled gas is placed in the upper part of separation chamber 14 and is in communication with a coalescence-type de-oiling cartridge 17, mounted on a side face of connection body 4, by means of a passage 4b provided in said connection body.
  • a plurality of longitudinal channels is provided within cylindrical shell 5, of which the outer surface 5a is uniformly covered with radial fins to assure an efficient heat exchange.
  • the channel 21 situated at the lowest level in separation chamber 14 has an opening 21a that serves as inlet for the separated oil, which will thus circulate in channels 21 by passing through the communication passages 22 between pairs of adjacent channels provided at the ends of shell 5, one of which can be seen in Figure 8.
  • the coalescence-type de-oiling cartridge 17 is mounted on a nipple 17a projecting from the side wall of body 4 and communicates with a passage 18 within connection body 4 that makes the compressed gas available for use through a minimum pressure valve 19 and an outlet duct 27.
  • a filter provided on the bottom of compressor body 2 assures the final conditioning of the cooled oil before it is re-circulated.
  • Motor 1, compressor body 2, connection body 4 and cylindrical shell 5 delimiting separation chamber 14 are all arranged within a tubular body 26.
  • Said tubular body has an enlarged end 26a on the side opposite to motor 1 that houses a fan 23 equipped with an autonomous motor 23a and serving to suck fresh air into tubular body 26 to cool the oil circulating in channels 21 through the finned heat exchange surface 5a provided on cylindrical shell 5.
  • the gas compressed by screw rotors 3 is mixed with oil when it is discharged into outlet chamber 10, whence it reaches duct 11 through the passage 4a provided in connection body 4.
  • Fan 23 is controlled by a thermostat, not shown on the drawings, as a function of the temperature of the cooled oil, so that it comes into operation only when this is necessary and will remain switched off, especially in the compressor start-up phase, until the oil reaches its steady state operating temperature .
  • the entire unit is mounted on a support 7 like the one illustrated in Figure 6.
  • the operation of replacing the de-oiling cartridge can be carried out with extreme simplicity, because it is installed outside cylindrical shell 5 and tubular body 26 and does not therefore requires dismantlement of oil separator unit 13. Furthermore, since this dismantling does not have to be catered for, the fan that circulates the oil cooling air can be arranged in a more rational position.
  • the screw compressor could be supplied without motor 1, but provided with the mechanical connection means necessary for operating it, for example, a motor shaft capable of being connected to appropriate operating means at the user's disposal.
  • a motor shaft capable of being connected to appropriate operating means at the user's disposal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

L'invention concerne une unité compresseur à vis comprenant un corps de compresseur (2) définissant une chambre de compression (2a) dans laquelle sont logés au moins deux rotors hélicoïdaux (3) venant en contact l'un avec l'autre et actionnés par un moyen d'entraînement (1) ; un moyen pour séparer l'huile de lubrification entraînée par le gaz comprimé, disposé dans une chambre de séparation (14) qui communique avec la chambre de compression (2a) ; un moyen (17) pour filtrer le gaz comprimé sortant de la chambre de séparation (14) ; des moyens échangeurs de chaleur (5a, 21) servant à refroidir l'huile de lubrification séparée. Les moyens échangeurs de chaleur sont placés au niveau d'un boîtier (5), qui délimite la chambre de séparation (14), et comprennent une surface échangeuse de chaleur (5a) le long de laquelle un courant d'air de refroidissement circule de manière forcée, l'huile séparée du gaz comprimé dans la chambre de séparation (14) étant mise en contact avec ladite surface. Ce compresseur présente également un moyen d'accouplement servant à relier ledit corps de compresseur (2) audit boîtier (5) ainsi qu'un moyen (26) servant à acheminer l'air de refroidissement vers la surface échangeuse de chaleur (5a) et entourant au moins le corps de compresseur (2) et ladite chambre de séparation (14).
PCT/IT2002/000239 2001-04-17 2002-04-16 Unite compresseur a vis avec systeme de refroidissement d'huile incorpore WO2002084124A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP02728044A EP1379786B1 (fr) 2001-04-17 2002-04-16 Unite compresseur a vis avec systeme de refroidissement d'huile incorpore
DE60203272T DE60203272T2 (de) 2001-04-17 2002-04-16 Schraubenverdichtereinheit mit eingebauter ölkühlung
AT02728044T ATE291175T1 (de) 2001-04-17 2002-04-16 Schraubenverdichtereinheit mit eingebauter ölkühlung

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITFI01A000067 2001-04-17
ITFI20010067 ITFI20010067A1 (it) 2001-04-17 2001-04-17 Compressore a vite con raffreddamento integrato dell'olio
ITFI20020014 ITFI20020014A1 (it) 2002-01-18 2002-01-18 Perfezionamento ad un compressore a vite con raffreddamento integratodell'olio
ITFI02A000014 2002-01-18

Publications (1)

Publication Number Publication Date
WO2002084124A1 true WO2002084124A1 (fr) 2002-10-24

Family

ID=26332712

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2002/000239 WO2002084124A1 (fr) 2001-04-17 2002-04-16 Unite compresseur a vis avec systeme de refroidissement d'huile incorpore

Country Status (5)

Country Link
EP (1) EP1379786B1 (fr)
AT (1) ATE291175T1 (fr)
DE (1) DE60203272T2 (fr)
ES (1) ES2237678T3 (fr)
WO (1) WO2002084124A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1936203A3 (fr) * 2006-12-13 2014-01-01 Pfeiffer Vacuum Gmbh Pompe à vide dotée d'un ventilateur
US10995995B2 (en) 2014-06-10 2021-05-04 Vmac Global Technology Inc. Methods and apparatus for simultaneously cooling and separating a mixture of hot gas and liquid
US11181110B2 (en) 2016-09-21 2021-11-23 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Screw compressor for a utility vehicle

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005033084B4 (de) * 2005-07-15 2007-10-11 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Öleingespritzter Verdichter mit Mitteln zur Öltemperaturregelung
DE202008012380U1 (de) * 2008-09-18 2010-02-11 Oerlikon Leybold Vacuum Gmbh Vakuumpumpe
DE102013020533A1 (de) 2013-12-12 2015-07-02 Gea Refrigeration Germany Gmbh Verdichter
DE102013020536A1 (de) * 2013-12-12 2015-06-18 Gea Refrigeration Germany Gmbh Verdichter
CN105003433A (zh) * 2015-08-17 2015-10-28 山东百惠精工机械股份有限公司 一种强制风冷罗茨鼓风机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0277582A2 (fr) * 1987-02-02 1988-08-10 ING. ENEA MATTEI S.p.A. Unité de soupape thermostatique et de filtre d'huile pour compresseurs
US4780061A (en) * 1987-08-06 1988-10-25 American Standard Inc. Screw compressor with integral oil cooling
DE4033154C1 (en) * 1990-10-12 1992-01-09 Zwickauer Maschinenfabrik Gmbh, O-9541 Zwickau, De Air cooled screw compressor - has motor housing and air compressor block flanges coupled via connector
US5697763A (en) * 1993-10-29 1997-12-16 Cash Engineering Research Pty Ltd Tank mounted rotary compressor
US5785149A (en) * 1995-09-12 1998-07-28 Atlas Copco Airpower, Naamloze Vennootschan Screw-type compressor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0277582A2 (fr) * 1987-02-02 1988-08-10 ING. ENEA MATTEI S.p.A. Unité de soupape thermostatique et de filtre d'huile pour compresseurs
US4780061A (en) * 1987-08-06 1988-10-25 American Standard Inc. Screw compressor with integral oil cooling
DE4033154C1 (en) * 1990-10-12 1992-01-09 Zwickauer Maschinenfabrik Gmbh, O-9541 Zwickau, De Air cooled screw compressor - has motor housing and air compressor block flanges coupled via connector
US5697763A (en) * 1993-10-29 1997-12-16 Cash Engineering Research Pty Ltd Tank mounted rotary compressor
US5785149A (en) * 1995-09-12 1998-07-28 Atlas Copco Airpower, Naamloze Vennootschan Screw-type compressor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1936203A3 (fr) * 2006-12-13 2014-01-01 Pfeiffer Vacuum Gmbh Pompe à vide dotée d'un ventilateur
US10995995B2 (en) 2014-06-10 2021-05-04 Vmac Global Technology Inc. Methods and apparatus for simultaneously cooling and separating a mixture of hot gas and liquid
US11181110B2 (en) 2016-09-21 2021-11-23 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Screw compressor for a utility vehicle

Also Published As

Publication number Publication date
DE60203272T2 (de) 2006-02-09
ATE291175T1 (de) 2005-04-15
DE60203272D1 (de) 2005-04-21
EP1379786B1 (fr) 2005-03-16
EP1379786A1 (fr) 2004-01-14
ES2237678T3 (es) 2005-08-01

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