CS231351B1 - Piston compressor plant - Google Patents

Piston compressor plant Download PDF

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Publication number
CS231351B1
CS231351B1 CS796568A CS656879A CS231351B1 CS 231351 B1 CS231351 B1 CS 231351B1 CS 796568 A CS796568 A CS 796568A CS 656879 A CS656879 A CS 656879A CS 231351 B1 CS231351 B1 CS 231351B1
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CS
Czechoslovakia
Prior art keywords
piston compressor
hto
crankshaft
yctahobkh
compressor plant
Prior art date
Application number
CS796568A
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English (en)
Inventor
Manfred Malick
Original Assignee
Manfred Malick
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Publication date
Application filed by Manfred Malick filed Critical Manfred Malick
Publication of CS231351B1 publication Critical patent/CS231351B1/cs

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B25/00Multi-stage pumps
    • F04B25/02Multi-stage pumps of stepped piston type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B41/00Pumping installations or systems specially adapted for elastic fluids

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Description

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OdazHo npzHHToe ono3ZToe zcnosHeHze npescrassaeT eqe óoxeensoxze npesnocasKz. $3 npHHDznzasBHo luecTZ doKOBHX noBepx-Hociefi Ha Kopnyce npzBOSHoro MexaHZ3Ma, κοτορυίι, kbk npaBzso·,ζοποζηθη b Buse Kyda, hhtb Z3 hzx c caMoro Hazasa hbshktch3aHHTHMH npHBOSOM, CMa30ZH0fi rpyiHIOH, SByMH ΠρΗΟΟββΖΗβΗΖΗΜΖHZSZHSpOB Z HKKHeŽ ZaCTBIO K3K MOHTaSHaH nSOUiaSB. ΤθΜ OSMUM,BepxHHH ctopona Kopnyca ocsaeTcfl socTynoM κ BHyTpeHHocTz npz-BOSHOrb MexaHH3Ma, HO OHa B 0Π03ΖΤΗ0Μ ZCnOSHeHZZ 3aCTpoeHanpoMestyTOHHHM oxsaweseM, npezMymecTBeHHO pacnoso&amp;eHHHM HasΗθκ. 3aHHMaeMaH 3Tzm bzsom zcnosHeHzs oTHoczTesBHo dosBmaansomass οτηηοβζτοη pacnososeHzeM npzBOSHoro SBzraTess esedosBine. ynpyroe ycTaHOBsemie de3 $yHsaMeHTa raicoS ycTaHOBKZB03M0KH0 tosbko, κθκ npaBzso, b csyzae πρημθηθηηη ochobhožpaMu, BocnpHHHMaraineS odmzS arperaT. HosHoe KancioszpoBaHze ot3Byica b nesecoodpa3HOM zcnosHeHzz hbshiotch ηθμηοζζμημζ. Koh-CTpyKTZBHHe y3SH c nzszHSpaMz iipasoz z seBož οτσροΗ ηθβο3μο£-HO BUnOSHHTB ΠρΗΜΟ OSZHaKOBO. ‘
JlaJIBDie Z3BeCTeH MHOrOSZSZHSPOBHZ KOMnpeCCOp CO 3Be3S00dpa3H0pacnosoHeHHHMZ b oshoě esockoctz nzszHSpaMz, npzBOS κοτοροτοnpozcxoszT CBepxy. ΓλθβηηΚ πρζ3ΗΗΚ θτογο Kownpeceopa cynjecTByετ b tom, hto MacJioHacoe '· pacnososeH Hzse ypoBHH Macsa z moh-TasHHÉ dsoK, cocTOflnjzft Z3 KoseHzaToro Basa, rsaBHoro inaTysaz Bcex npzseiiHHX maTyzoB, BCTpazBaeTcz b KOMnpeccopHH® κορ-nyc z npzBOSHnz SBzraTesB z KOMnpeócop coeszHéHH Μγφτοβ, aTaKKe Kopnyc KOMnpeccopa ZMeeT b KazecTBe ηζχηθγο οκοηζβηζη 3 nojwoHa Oto c KpenesHoS κροΝίκοκ, cjiysamefi naň MOHTasa kom-npeccopa (DD-v,? 27 146). - -
He^ocTaTKu 3Toro KOMnpeccopa b οτηοιιιθηηη k npHBojmoMy ícbh-raT&amp;mo h KOHCTpyKKHH noOTona cymecTByioT b tom, hto Mexoy -πρΗΒΟβΗΗΜ íBHraTejieM h KOJieHHaTHM BajiOM npejycMOTpeHa My$-Ta, KOTopaa ηρτκο,ίξητ κ yBejnrieHHio nncna KOHCTpyKTnBHHX one-ΜΘΗΤΟΒ, a TaKSe Κ B03HHKH0BeHHID norpeniHOCTH HéHTpOBKH.
Tan KaK Kopnyc KOMnpeccopa jí hojuoh hbjlhiotch κοηοτρτκτηβηοΚejiHHHixeS η He ημθιοτ nopoxnoro npocBeTa, ne cyirecTByeT onra-MajiBHOH bo3mózhocth oTBo^a reiuia.
TaKOK H3BeCTHHE KOMnpeCCOp CO 3Be3A00Ópa3HHM paCnOJTOJKeHHeMIEUEHJipOB HBJIHeTCH ΚρΟΜΘ pacnOJIOSeHHH npHBOJÍHOrO ÍBETaT6JIH ' H HOTOOHa ΗΘΗ,ΙζθΗΤΙίΗΗΗΜ C BtfflieyKa3aHHHM Η300ρθΤβΗΗβΜ. To 7ΚΘ CaMOSycTaHOBJíeHne othochtch k KOMnpeccopy.no naTeHTy DS -os19 16 857, b κοτοροΜ julh yjrymaeHnn oxjiaxneHHH KOMnpeccopanpeíycMOTpeHH ΒθΗτηηητορ no# doíkohom.
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UejiB K3oópeTeHzn coctoht b tom, htoóh co3saTL nopniHeByraKOMnpeccopHyio ycTaHOBKy b οπο3ητηομ ηοποληθηηη κομπβκτηοH ΟΗΜΜΘΤρΗΗΗΟ. H3MEHME CWOCTH Η30ΕΡΕΊΈΗΗ3 3anana H3oópeTeHHH coctoht b tom, htoóh csenaTB ηηθητηη-hhm ocb KOJienaaToro Baňa c ocbk neHTpa τηηθοτκ βοθη koh- CTpyKUHH..
CornacHo H30ÓpeTeHns), sahana pemaeTcn τθμ, hto κολϊθηηβτηηBaň pacnojiaraeTca b KapTepe BepTHKajiBHo, cboóohho bhchhhhnojwoH - Ha ΗΐηκΗθβ οτοροΗβ KapTepa η οημμθτρηηξο κ κολόξ-naTOMy Bány, a nojyiopKa KOMnpeccopHot ycTaHOBKH ocyiqecTB-jineTca Ha Kpaax CTyneHnaToro nopinHH. ípyroe πρββποΗΤΗΤβ,ηΒ-Hoe ηοποληθηιιθ coctoht b tom, hto BHcaeiffiawní rnyinHTejiBniyMa η oxnaKH-TenH pacnojioseHH οημμθτρηηηο k KoneHnaTOMy Bány.
ΠΡΚΜΕΡ QCWCTBJIM3 M30EPETEHHE I430ÓpeTeHHe ο0έηοηηθτοη ηιεκθ npmviepoM ocyinecTBJíeHHH.
Ha npmiaraeMHX nepTesax HOKa3aHo: Φηγ. I: Βηλ cnepejíH KOMnpeccopHoS ycTaHOBKH Óe3 npoMesyTon·ΗΟΓΟ H JtOnOJIHHTGJILHOrO OXJia^HTeJIH. Φηγ. 2: Bhjc CBepxy Ha KOMnpeccopHyio ycTaHOBKy no B-B. Φηγ. 3: Βκβ cóoicy KOMnpeccopHoft ycTaHOBKH no A-A.
HcnojiHeHHUil b bhks Kyóa Kap.iep I οοκβρκπτ íByxKDJieHqarafiBaJi 2, nepneHíHKyjiapHo ycTaHOBJíeHHHS, a yjmHHeHHan h Han-paBJíeHHan BBepx KOHneBan nanma KOToporo HenocpescTBeHHO&amp;ecTKO coeflHHeHa c ροτοροΜ sjíeKTpiraecKoro πρηβο£ηογο KBnra-TejLH. ΙΊ3 3Toro βο3ηηκβθτ pacnojioseHne neTHpexyrojiBHoro κορ-nyca jíBHraTejiH 3 Ha BepxneĚ οτοροκβ KapTepa I. JÍBe προτκΒΟ-nojioKHne óokobhg ποβθρχηοοτη KapTepa I npe^ycMOTpeHii jvihΠρΗΟΟθίζΗΗΘΗΗΗ aÓCOJIIOTHO ΟβΗΗΘΚΟΒΝΧ ΗΟΠΟΛΗΘΗΗΗΧ, HO ΠθρθΜΘ-meHHHX npyr κ £pyry Ha 180° ηοποπηθηηηχ b βηλθ Kyóa cTyneH-HaTHX IíHJIHHJipOB 4, ΠρΗΉΘΜ ΗΟΟΙΪΜΜβΤρΗΉΘΟΚΟΘ ΠΟΗΟΚΘΗΗΘ npe£-Ha3HaneHHtix paÓonHX BTyjioK nopuiHH BHyTpn HapyzHoro KOHTypaKOMneHCHpyeT ηθοοοοηοοτβ KOJieH κοηθηήβτογο Bajia. JÍBeocTaJtB-ηηθ óokobhs ποβθρχηοοτη KapTepa I npe^cTaBJLřWT coóok ftocTa-ΤΟΉΗΟ ÓOJIBIDHe UieJIH RJIR TeXOÓCJiyHHBaHHH 10. HhZHHH CTOpOHaKapTepa I npHHHMaeT cboÓosho BncffHHftnojKOH 5, pacnonozeHHHÍiΟΤΗΟΟΗΤθΗΒΗο! #ByXK0JieH*iaT0r0 Basa 2 CHMMBTpHHHO·Haxojuwiec^ c oóenx ctopoh Kopnyca BBHraTejiH 3 η βμθμιηθοηb pacnopHseHHH Han cTyneHnaTHMH uramnpaMH 4 cBOóojiHEie npo-.CTpaHCTBa BocnpHHHMaioT BcacKBaíoiime TJiyoiHTejiH inyMa 6, koto-pue Ο,ΚΗΟΒρθΜΘΗΗΟ CJiy&amp;aT B03jyiHHKMH φΜΒΤρθΜΗ. C oóenx οτοροΗ προαοηβηοη och ycTaHOBKH b ηιεηθμ ynacTKepacnojioseHK οκηηθκοβηθ, ho npoTHBonojiosHiie, Tpyóooópa3HnenpoMexyTOHHne oxjiajpiTeJiH 7. To se c oóezx οτοροΗ, προτπΒο-hojiqjkho h napajmejiBHo' κ npoMe&amp;yTóHHHM oxJiajffiTejiHM 7 Haxojwch b BepxHeM ynacTKe οβηοτηπηο HcnojmeHHKe nonoJKHTeJiBHiieoxjiawejm 8. - 5
BcacHBaOTie miyniHTejni myMa h oxjiawejin 7, 8 pacnojiosemj .οτΗοοιιτβΛΒΗο KOJieiraaToro Bajia οημμθτρηήηο. ycraHOBJíeinie kom- -npeccopHOK ycTaHOBKH ocymecrBJLaeTca onopaw 9, npejiycMOTpeH-hhx Ha Kpafix cTyneHaaTHx nowipoB 4. ΠρΗΗΙΒίΠ JieííCTBHH MaiUHHH:
Hepe3 BcacHBaw® rxyinHTejix inyMa 6, ojmoBpeMeHHO βηποχηθη-ηηθ b KanecTBe B03flymHHX φιυΒτροΒ, BcocaHHHS B03,nyx CBepxynocTynaer b-cooTBeTCZByioiííHe ropn3OHTaziBHo pacnojioaceHHEie cry-neHaarae φϊληηζφη 4, nepeKaHHBaercH lípu xo^e BcacKBaHHH ne-pe3 pacnojio&amp;eHHHe b KJianaHHUX rojioBKax BcacHBaioiw miananHh nocTynaeT b KaMepa csaTM nepBoír CTynemí, c κοτορκχ nocTy-íiae? npn padoneu xo#e η βηχολητ aepe3 npejiycMOTpeHHHe c donaBHH3y y iwxHjpoB ο?ΒθροτιΐΗ. TenepB B03jiyx nepeKaHHBaeTca ne—pe3 pacnojioseHHHe c odenx οτοροΗ ycTanoBKu Tpydoodpa3HHe npo-MesyTOHHHe oxjiajwexií 7 κ pacnoJioJKeHHOg b προτηβοπολο&amp;ηομ CTy-neHHaTOM nxjnwipe 4 OooTBercTByraneS BcacHBaiomefi οτοροΗθ bto-ροϋ cryneHK h bhxojtht nocJie csaTiiH οοοτβθτοτβθηηο Ha ;npyroxCTopone Toro cryneHHaToro ujuníHUpa 4 H3 ηθγο h nepeKaaiíBaeTCHaepe3 npejiycMOTpeHHHe c odeiix οτοροΗ ycTaHOBKX, pacnoxo&amp;eHHHenapajmejiBHO κ npoMe&amp;yTOHHHM oxxajwejiHM 7 .nonojiHiíTejiBHHe ox-jiawejni 8. Ccmma II odo3HanaeT KancmBHux npé£oxpaHHTejiBínyMa. ΚΟΠΟΛΉΘΗΗβΜ KOMHpeCCOpHOH yCTaHOBKH, COBJíaCHO H30dpeTefflW,nojiyHaercH, hto yMeHBinaercH οοηοβηβη imomanB bcoií KOHCTpyKipraH3-3a pacnoJio&amp;eHHH sjreKTpoíBsraTeJiH Ha# KaprepoM,'hto-n3-3anepeMemeHHH κοχθη nps οπο3ητηομ ηοποχηθηηη HeH3desHHe μομθη-TH HHepiW HaXO&amp;ÍITCH B BepTHKaJIBHOíí miOCOKOCTH B ΠρΟΤΗΒΟΠΟ-JIOSeHHOCTH K OdHHHOMy 0II03tfTH0My HCIIOJIHeroW C ropil3OHTa^BHOpacnOJIO&amp;eHHHM KOJieHHaTHM BanOM, npH ΚΟΤΟΡΟΜ ΜΟΜΘΗΊΉ HHepUJíHseírcTByioT ropn3OHTaJiBHo, s, TaK napajuiexBHO κ ftyH^aweHTy hnpnHHMaeTCH oaeHB TpynHO. BcxeflCTBue τογο, hto npa yciaHOBKe,corjiacHO H3odperemro, μογλθητη HHepiw jieficTByior nepneHJwy-jiapHo Ha MOHTasHyio nxomajíB, T.e. nojiyaaeTCH bo3mokhoctb Hec-xosHoro, ynpyroro h desrayHRaweHTHoro ycTaHOBJíeHHH. - 6 -
Jlpyrne npeHMymecTBa coctoht b tom, hto socTuraeTcn nojman'ciiMMeTprreříocTL· Bceíí KOHcrpyKmm n ocb KOJieHnaroro BaňacraBOBHTCH ocbio neHTpa TmcecTH, hto no oTHomemra jiymneS jxoc-TynHocTK ABe doKOBHe noBepxHOCTU KapTepa ocTaHyTcn CBodoK-hhmh jyra oTBepcTH®, HeodxojuíMHX πριι μοητη&amp;θ η TexodcJiysnBa-HHH, ΉΤΟ ÍDERHEH CTOpOHa KapTepa ÓOJIBIUe He ΠρΗΜΘΗΗΘΤΟΗ K3KMOHTaJKHan rwomanB·, ho w ycTaHOBJíeHHH cboóosho BucjrceS h,τθμ caMHM, HMeraneft óojiBmyio iuiomaSB pajmaiw nosnoHa, η ήτο,ΗβκοΗ'θπ, KÓMnaKTHHM κοποΛΗΗΤθΛθΜ co3£aioTC.H xopoiuse npejmo-cturKH ftJLH npocToro npesoxpaHHTejiH ot niyMa.
IlocJiejmee npeHMymecTBO aocTHraeTCH ocodeHHO τθμ, hto KOMnpec·copHan ycTaHOBKa coctoht H3 inecTn ολοκθηηηχ nocjieflOBaTejiBHOmi jipyr Ha# «apyroM ηοποληθηηηχ b BH£e Kyda KOHCTpyKTUBHHXy3JiOB OKHHaKOBofr βθλπηζην, πρπ κοτοροτ" ητϊκηκηθ y3Jm hjih £θ-TaJIH ΗΘ BHXOÍHT 3a KOHTyp KOHCTpyKIBÍH Η B OTíeJIBHOCTH HeonpeaeJiHiOT pa3Mepn no βηοοτθ, iunpnHe hjih jymHe ycTaHOBKH.BBHsy KOMnaKTHocTH ycTaHOBKH, paccMaTpiíBajiocB βηποληθηηθoxoiawe<7ie&amp;, HcnojmeHHBíX ksk Ha3HBaeMHe oxjiasnTejm c Kopny-com H3 Tpyd. 3tot npnHiwn BunojiHeHHH oxjia^KTejieft He HBJíneT-cn npeKMeTOM H3odpeTeHnn, ho ero Heodxojnn-w paccwiaTpHBaTBjyin KOHiíemxHH Bcen KOHCTpyKiwt, noTOMy hto noJiynaiOTCH Tpyd-narae ox^ajíHTejiH, κοτορκβ mojkho pacnojtaraTB Ha óokobhx no-BepXHOCTHX yCTaHOBKH C SKOHOMHefi npOCTpaHCTBa. TaKHM·0Ópa30MnojiynaeTcn HamwEHoe, οΗΜΜβτρηηΗοβ h oósopHoe pacnojioHemieannapaTOB, κοτορ.οθ ne yBeJummaeT odiiíxe pa3MepH η ηηκθκημodpa3OM He 3aTpy^HHeT socTymiocTB κ npiiBOAy h KnananaM.OdHHHO nacTo οτ^θλβηο ycTaHOBJíeHHue jíonojiHHTejiBHiie oxjiajui-Tejin hbjihiotch 3AecB nocTOHHHO HHTerpupyeMoS nacTBio ycraHOB—KU. 7
ΦΟΡΡΜΑ Κ30ΕΡΕΤΕΗΗΗ 1. J&amp;yxcTyneiniaTaH, jtByxííHJníHAPOBaH nopniHeBan KOMnpeccopHaHycTaHOBKa c βοληηημ oxjiasweHiíeM b οπο3ητηομ HcnojmeHim c ζκφφθρβΗίχιιευίΒΗΗΜ iuyHsepoM H cBepxy pacnoJio&amp;eHHHMΘΛΘΚΤροπρΗΒΟπΟΜ, OTJDIHaiOD}aHCH TOM, HTO KOJieHHaTHft B3JI . (2)pacnojiaraeTCH b KapTepe (I) BspniKajiBHo, cboóojoío bhch-hhe hojwoh (5) - Ha hhshsS ciopoHe KapTepa (I) η οημμθτρηηho κ KOJieHHaTOMy Basy (2), a noxmopKa (9) KOMnpeccopHon ,ycTaHOBKH ocyiqecTBJíHeTCH Ha Kpanx cryneHnaroro nopciHH (4). 2. IIopniHeBaH KOMnpeccopHaa ycTaHOBKa no nyHKTy I, OTJDínaio-iqaacH τθμ, hto BcacHBawrií rnymuTenB myMa (6)‘’h oxjiajm-T6Jm (7, 8) pacnojiarasTCH οημμθτρμήηο οτηοοητθλβηο ochKOJieHnaToro Bajia.
AHHQTAW13 Η3θόρβΤθΗΗθ KacaeTCH íByxGTyneHHaToí?, ^ByxuHJniHípoBOE nop-HIHCBOÍí KOMnpeCCOpHOK yCTaHOBKH B 0Π03ΗΤΗ0Μ HCÍIOJIHSHHII COCBepxy paCHOJIOKeHHHM θ-ΠθΚΤρΟΠρΖΒΟβΟΜ.
UeJIL· Η300ρθΤβΗΉΗ COCTOHT· B TOM, HTOÓH C03HaTL ΠθρΐΙ1ΗΘΒ3Π0KOMnpeccopHyio ycTaHOBKy b οπο3ητηομ HcnojmeHHH KOMnaKTHoΗ ΟΗΜΜΘΤρΗΗΗΟ. 3ana^a Η300ρθΤΘΗΠΗ COCTOHT B TOM, HTOÓHCfleJiaTL ΗΤξθΗΤΗΉΗΗΜ OCL KOJieHHaTOrO BaJia C .OCLH IjeHrpa THjEOCTHBceíí KOHCTpyKiw.
CoiuiacHO H3oópeTeHHio sahana pemaeTCH τθμ, hto KOJieíraaraí! Báji pacnoJiaraeTca b KapTepe, cboóosho bhhchhh ποζκοη - Haηπηηθη οτοροΗΘ KapTepa η οημμθτρηηηο k KOJieiraaTOMy Bajiy,a nojinopKa KOMnpeccopHon ycTaHOBKH ocymecTBJLHeTCH Ha KpanxCTyneiraaToro nopniHH.

Claims (2)

  1. Předmět vynálezu
    1. Pístová kompresorová, dvoustupňová, dvouválcová stanices vodním· chlazením v protilehlém provedení s diferenciál-ním plunžrem a shora umístěným elektrickým pohonem, vyzna-čena tím, že klikový hřídel (2) je uložen v karteru (1)vertikálně, volně zavěšená vana (5) se nalézá na dolnístraně karteru (1), symetricky ke klikovému hřídeli (2),a podpěra (9) kompresorové stanice je umístěna na koncíchstupňovitého pístu (4).
  2. 2. Pístová kompresorová stanice podle hodu 1, vyznačujícíse tím, že tlumič hluku sání (6) a chladiče (7, 8) jsouumístěny symetricky vzhledem k ose klikového hřídele. 4 výkresy
CS796568A 1978-10-25 1979-09-27 Piston compressor plant CS231351B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD78208649A DD147787A3 (de) 1978-10-25 1978-10-25 Hubkolbenverdichter-anlage

Publications (1)

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CS231351B1 true CS231351B1 (en) 1984-11-19

Family

ID=5514994

Family Applications (1)

Application Number Title Priority Date Filing Date
CS796568A CS231351B1 (en) 1978-10-25 1979-09-27 Piston compressor plant

Country Status (6)

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BG (1) BG33239A1 (cs)
CS (1) CS231351B1 (cs)
DD (1) DD147787A3 (cs)
DE (1) DE2939298A1 (cs)
IT (1) IT7950637A0 (cs)
PL (1) PL122668B1 (cs)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3032518C2 (de) * 1980-08-29 1993-12-23 Duerr Dental Gmbh Co Kg Ölfreier Verdichter
IT8153068U1 (it) * 1981-03-31 1982-10-01 Grenco Spa Gruppo moto-compressore d'aria
US5482443A (en) * 1992-12-21 1996-01-09 Commonwealth Scientific And Industrial Research Organization Multistage vacuum pump
DE60100626T2 (de) * 2001-06-13 2004-06-24 Giuseppe Sette Verdichteraggregat für Kraftfahrzeuge
AT9916U1 (de) 2006-08-16 2008-05-15 Leobersdorfer Maschf Mehrstufiger verdichter
CN203648773U (zh) * 2013-11-18 2014-06-18 李名轩 以数个汽缸组分隔进出气口的雾化器

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PL122668B1 (en) 1982-08-31
IT7950637A0 (it) 1979-10-22
DD147787A3 (de) 1981-04-22
BG33239A1 (en) 1983-01-14
DE2939298A1 (de) 1980-09-11
PL219157A1 (cs) 1980-07-14

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