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Lubrication System CLU4 for lubrication of large 2-stroke crosshead diesel engines - resulting in your operating costs being cut due to lower oil consump tion

The advantages you get from a system

• Drivenbyacommonrailsystemortheoptionaloilsupplyunit

• Modularstructureofthetimedlubricatormakessurethesystemcanbeservicedwhileinoperation(noredundancyrequired)

• Timedlubricatorwithpistonportcontrolandadditionalheatingdevicesarenormallynotrequired

• Mechanicallydefined,non-adjustablemeteringratesandin-tegratedvalvefunctionspreventoperatingerrors

• Aseparatecontrolelectronicsunitmonitorsthelubricationfunc-tionsofeachcylinder(ALM-unit)

• High-performancefiltersystemwithscaletomeasureoftotaloilconsumption

• Lowinstallationcoststhankstotheintegratedbus-technology

• Amoderntimedlubricationsystemwithnozzles,ifrequired,fortheOEMmarket

• Adaptableforall2-strokecrossheaddieselenginesrangingfrom600to6000kW/cylinderwith6to8quillseach

• The mature CLU4 technology is now available in the compact CLU4-C size

• WÄRTSILÄoffersacompleteretrofitsolution,includinginstallation,fortheengineseries,RT48-96.

Common Rail

Master ControlUnit

CLU 4 Lubrication system for large 2-stroke crosshead diesel engines

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Master ControlUnit

Fordecades, SKF Lubrication Systems Germany AG has manufacturedcylinderlu-bricationsystemsforlarge2-strokecross-headdieselengines.Speciallydevelopedlubepumpsforuseinconjunctionwithso-calledaccumulatorsensureefficient,load-depen-dentlubricationofthecylinders.

InadditiontotheexistingCLU3systemwithitssystem-relatedadvantages,suchashighreliability,easeofoperationandsimplemain-tenance,thefullyelectronicallycontrolledCLU4systemwasdeveloped.TheaimoftheCLU4developmentwastobringoilcon-sumptionevenmoreintolinewiththemainloadfactorsandoperatingconditions.

Themainfactorsincludetheenginespeed,load,startingandrunning-instatusetc.Moreover,attentionisalsopaidtothefuelandthelubricantcomposition.

AftertheMasterControlUnitevaluatestheloadfactors,itoptimizesthecyclerateandmeteringinstant.Withanoptimalsystemdesignandadjustment,itispossibletocutoilconsumptionevenmoretoroughly0.8g/kWh(0.5g/BHPh),thusminimizingtheuseofvaluableresources.

ThenewlydevelopedCLU4electroniccylin-derlubricationsystemdoesthiswiththehelpofthelatestcontrolelectronics.Thankstoasmartcombination,withspecialquillsinthewallofthecylinder,itispossibletoweteverypointonthemovingpistons,e.g.theringpa-ckage,pistonskirt,etc.

Incaseofspecialquillswithintegratedspraynozzles,theheavilyloadedcylinderwallcanalsobelubricateddirectly.

Since2009,thissystemisalsoavailableasaCLU4-Cversionwithacompactpumpdesign.

System function CLU4 and CLU4-C

TheCLU4lubesystemonmodernengineswithcommonrailtechnologyconsistspri-marilyof:

• Timedlubricators(1percylinder)with6to8outletportsandexternalmonitoringelectronics

• Quillsandspeciallydevelopedmastercontrolunit(providedbycustomer).

• Filtersystemwithscaleformeasurementoftotaloilconsumption.

Thecentralizedoilsupplysystemisactivatedbytheengine’smanagementsystembeforetheenginestartsup.Sothankstomoderncommonrailtechnology,servo-oilisalreadyavailabletothetimedlubricatorsbeforetheenginestarts.Thelubricating-oilneedsoftherespectivecylindersaredeterminedbythemastercontrolunit.Alubepulseisemittedthroughthecontrolelectronicsduetoactua-tionofa4/2-waysolenoidvalve.

Themeteringpistonshung-inthecentraldrivepistonabruptlyexecuteajointlydefinedmeteringstroke.Thespecialquillswithorwithoutaspray/injectionfunctiondischargetheirexactquantityoflubricantwithpinpointaccuracy.Dependingontheloadandoperat-ingstate,alubepulseistriggeredwithevery2nd,3rd,4thornthpistonstrokeorcrankshaftrevolution.

Monitoringelectronicscheckthemeteringpressure.Thus,itchecksthepulselubricationsystemforblockage,trappedair,shortageoflubricantanddrivefaults.

CLU 4 Lubrication system for large 2-stroke crosshead diesel engines

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flow diagramme CLU4 und CLU4-C

Driven by the common rail system

Driven by theoil supply unit

P P

IP

IP

Drain tank

Standard/Retrofit version Common rail version

Running-in oil

filter and oilconsumption

test assy.

Master control unit

Filter

Normal cylinder oil

supply

60 bar

50 bar

M

Cylinder

P T

ba

1

P T

ba

1

Cylinder

14

CLU4-C CLU4

Master ControlUnit

Exampleofanapplication,consistingofanoilsupplyunit,timedlubricator,systemfilterandquills(WÄRTSILÄ).

Basic pump CLU4Basic pump CLU4-C

New!

New!

CLU 4 Lubrication system for large 2-stroke crosshead diesel engines

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GCommon features of the timed lubrica-tors (versions CLU4 and CLU4-C)

•Forcedmeteringofthelubricant

•Widerangeoflubeoilviscosities-thankstopistonportcontrol

•Solenoidvalvetobebothelectricallyandmanuallyoperated

•Compactdesignwithintegratedvalve-screwsusedtoshutoffthelubricating-oilandservo-oilsystem,andtorelievethesy-stemofpressureduringmaintenancework

•Onlyonepressureaccumulatorperpump,whichpermitsfastmeteringstrokesand“soft”operation

•Onlytwocentrallylocatedventingscrews(lubeoilanddriveoil)

•Directlydrivenbythecommonrailsystemorbytheoilsupplyunitdesignedwithdoublewallsformaximumsafety

•Ifnecessary,e.g.totestindividualcylinders,itispossibletofeedrunning-inoilorspecialoil

•Powerfulpressureboost,canalsobeusedformeteringpurposesinpressurezonesorwithnozzleconcepts

•Calibratedtoyourneedsandtestedatthefactory,adjustablebymeansofexchangea-blemeteringscrew

•Longservicelifethankstotheselectionofspecialmaterialcombinationsandextralongguidearrangements

•Constantstrokevolumeensuresconstantdeliverycharacteristicsand/orspraypatterns

•Allimportantcomponentsaremountedonabaseplateandthusquicklyexchangeable

•Highsuctionperformance

Special features of the timed lubricator CLU4-C

•acompactversion,withoutintegratedscrewvalvesforlubeoilcut-offandpressurerelief,

•includingquickcouplingforcheckingandfillingtheNitrogen(N)filledpressureaccumulator

Timed lubricatorDependingontheapplicationandtypeofenginethepumpsareequippedwith6to8meteringpistonsandacalibratedmeteringscrew.Thebaseplatecontainsthevalvefunc-tionsandissupplementedwithapressureaccumulatorandsolenoidvalve.

Basic pump CLU4 / CLU4-C

Neu!

Features of the oil supply unit to be emphasized:

•Vibration-proofversionofanelectricmotorwithsafeplug-typeconnection

•Ruggedhigh-pressuregearpump,alsosui-tableforoilfeedsystems(3to8bar)

•Valveblockwithmultiplefunctionsandin-tegratedoutlet-portconnectorsforsystempressurereliefandmaintenancewhileinoperation

•Double-walledpiping,thusnolubricantcanleavethesystemduetoapossibleleakage,leakagemonitoringcentralizedwithpressuresensor.

Oil supply unit Type SA/B (Onlyrequiredforengineswithoutcommonrailinjectionsystemorretrofitapplications.)Theoilsupplyunitcomesintwoperformancerangesforsmall/medium-sizeandlargetwo-strokeengines.Thetwopumpunits(oneofthemastandbypump)arepre-installedonabaseplatetogetherwithavalveblock.

Oil supply unit SA/B

CLU 4 Lubrication system for large 2-stroke crosshead diesel engines

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Decide in favor of a modern SKF cylinder lubrication system

Oil filter system with sca-le for measurement of oil consumption Ahigh-capacitysuctionfilterisprovidedforbetweenthedailytankandthetimedlubri-catorslocatedonthecylinders.

Features of the oil filter system to be emphasized:

•Generousdimensioningensureslongser-viceintervals

•Benefitsoftheingeniousarrangementoftheshutoffvalveandventingvalve:-changeoffilterswhilethesystemisinope-rationenabled-measurementofthelubricatingoilcon-sumptionforallcylindersenabled-airpocketsintheoilflowavoided

•Filterwithdirtindicatorasastandardfeature

•Re-usablefilterelementsofstainlesssteel.

Oilfiltersystemwithscaleformeasurementofoilconsumption

Selectionchart,SA/Boilsupplyunit ExtensivetestseriesoveranumberofyearsprovetheefficiencyofourCLU4cylinderlubricationsystem.

WiththeCLU4orCLU4-Ccylinderlubricationsystemyougetaproductthatmeetsthelatestlubetechnologyrequirementsinthelargedieselenginesector.Amaximumfirepreventionresultsfromit’sdouble-walledpiping,whichatthesametimemeetsthemaximumsafetyre-quirements.TheCLU4orCLU4-Csystemcanbeexpandedtohandleanyfuturedevelopment.

Talktoyour2-strokeenginemanufacturer.

Example of application with spray nozzlesBenefit:enablesadditionalapplicationofoiltothesurfaceabovethepiston.

This brochure was presented by:

Order No. 1-0304-ENSubject to change without notice! (07/2014)

Important product usage informationAll products from SKF may be used only for their intended purpose as descri-bed in this brochure and in any instructions. If operating instructions are sup-plied with the products, they must be read and followed.Not all lubricants are suitable for use in centralized lubrication systems. SKF does offer an inspection service to test customer supplied lubricant to deter-mine if it can be used in a centralized system. SKF lubrication systems or their components are not approved for use with gases, liquefied gases, pres-surized gases in solution and fluids with a vapor pressure exceeding normal atmospheric pressure (1013 mbars) by more than 0.5 bar at their maximum permissible temperature.Hazardous materials of any kind, especially the materials classified as hazardous by European Community Directive EC 67/548/EEC, Article 2, Par. 2, may only be used to fill SKF centralized lubrication systems and compon-ents and delivered and/or distributed with the same after consulting with and receiving written approval from SKF.

SKF Lubrication Systems Germany GmbH 2. Industriestrasse 4 · 68766 Hockenheim · Germany Tel. +49 (0)62 05 27-0 · Fax +49 (0)62 05 27-101 www.skf.com/lubrication

® SKF is a registered trademark of the SKF Group.

© SKF Group 2014The contents of this publication are the copyright of the publisher and may not be reproduced (even extracts) unless prior written permission is gran-ted. Every care has been taken to ensure the accuracy of the information contained in this publication but no liability can be accepted for any loss or damage whether direct, indirect or consequential arising out of the use of the information contained herein.

Brochure note

951-130-314-DE/-EN OperatormanualLubricationssystemCLU4951-170-206-DE-EN OperatormanualLubricationssystemCLU4-C951-160-012-DE/-EN SparePartlistCLU4/CLU4-C