Innovative Power Transmission

HIGH SPEED GEARBOXESInnovative Gear in Power Plants Systems

First-Class Gearboxes

General

For many decades, RENKhas been a leading manufac-turer of highspeed gearboxesand enjoys an excellent repu-tation with their series TS,TB, TL, TNA and TNB. Supported by up-to-dateCAD-systems and computer-controlled production, pro-ducts of superior quality arebuilt and delivered worldwide.

Gearboxes

Depending on the specificati-on, the gearboxes are builtaccording to DIN 3990,AGMA 421.06 or API 613standard. In order to achieveoptimum efficiency and excel-lent running characteristicsregarding vibration and noise,the gear teeth, bearings,natural frequencies and rotordynamics are calculatedaccording to the latest stateof the art.

Type Designation

Construction series and cent-re distances are identified bythe gearbox designation. Theoverview shown belowexplains the meaning of thealphanumerical designation.The numerical part refers tothe centre distance. TNA andTL types are gear units withwide gear teeth which allowto realize low transmissionratios. TNB and TS have nar-row gear teeth for high trans-mission ratios. For centredistances up to 400 mm, thegear casings are manufactu-res with high-quality cast iron;Casings with welded steelconstruction are used forcentre distances up to 450 mm.

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written:T D S E Q - 560 TDSEQ-560T B - 900 TB-900T S E - 630 TSE-630

- centre distance [mm]

- = standardQ = quill shaft

- = double helical teethE = single helical teeth

- = without thrust collarD = thrust collar

T = high-speed gearbox

S = narrow gearingB = mean tooth width.L = wide gearing

- centre distance [mm]

- = standardQ = quill shaft

N = double helical teethE = single helical teethD = trust collar + single helical teeth

T = high-speed gearbox

B = narrow gearingA = wide gearing

written:T D A - 355 TDA-355T N A - 315 TNA-315T E B - 400 TEB-400

The following type code indicates the designations of the standardgearbox series:

Type Code Type Code TS,TB,TL gearboxes TNA,TNB gearboxes

Gearbox Transmission ratio i

i low i high

Series TNA TNB

Series TL TB TS

Example 1:(T) High-speed gearbox, (L) low transmission ratio, (E) single helical teeth with (Q) quill shaft, centre distance850 mm => designation:TLEQ-850

Example 2:(T) High-speed gearbox, (S) high transmission ratio, centre distance 710 mm => designation: TS-710

TNA-355 - Casing made from high-quality greycast iron

TB-900 - Steel casing - welded

Example 3:(T) High-speed gearbox, (D) thrust collar, (B) mean transmission ratio, (E) single helical teeth, centre distance 800 mm => designation: TDBE-800

Gearbox Elements

Gear Set

Different gear sets characte -rize the gearbox series.

Following design options arepossible:● single helical teeth● single helical teeth with

thrust collar● double helical teeth

Bearings

Split journal bearings areused for the standard design,and one bearing of the gearshaft is equipped with axialstop collars. If higher speedsare involved, radial tilting padbearings are mounted. Theuse of separate axial thrustbearings according to API613 is also possible.

Double helical teeth Single helical teeth

The gear shaft is built in two different ways:

Single helical teeth with thrustcollar

The quill shaft designtakes advantage of thehigher resilience of al longshaft, whereby the powerflow is directed into theoutput shaft that is loca-ted opposite to the drivenmachine.

Seals

The gearboxes require pres-sure oil lubrication. The oilmay optionally be supplied by a separate or a flange-mounted oil pump. The gear-box can also be connectedto a central lubricationsystem. The shaft ends of thegearboxes are sealed bymeans of a split, noncontactlabyrinth seal made fromaluminium. Upon request,special seals are also available.

Power loss andefficiency

With view to power loss andefficiency, RENK gearboxesare designed to the optimumpossible. Decisive factors toachieve a high efficiency arethe selection of the bearingsand their dimensioning aswell as the oil flow and typeof teeth.

Noise and vibrations

Each gearbox is noise-optimi-sed for nominal load. Thedimensioning of the teeth,lubrication and casing is focu-sed on low noise and quietoperation.

Instrumentation

The gearboxes can be sup-plied with a number of moni-toring instruments, such asbuilt-in resistance thermome-ters, thermocouples, vibrationdetectors, speed sensors,accelerometers, positiondetectors and oil pressuretransmitters. These devicesare also available in exproofor ATEX-design.

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Journal bearing with offset profile

Quality Assurance

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Accessories

The following accessories canbe supplied:● rotor turning devices● gear oil pump● screw-spindle pump

Production andAssembly

The gearboxes obtain highestdemands as the individualcomponents are manufactu-red on Hi-Tech-equipment,and the gearbox assembly iscarried out by highly qualifiedspecialists. As far as qualityassurence is concerned, ourplant is certified according toDIN / ISO 9001 / EN 29001.

Trial run

Every gearbox is subjected toextensive inspections andtests during which efficiency,noise emission, vibration cha-racteristics and proper func-tion of the lubrication systemare thoroughly checked. Theresults are recorded anddocumented.

Rotor turning device Gear oil pump Screw spindle pump

TB-630 Test run

Assembly of a TB-950 gearbox

Service around the Product

Our service team can and willarrange and/or co-ordinate allnecessary measures andensures competentassistance with remedieswithout any loss of time. Our highly qualified team ofexperts will be supporting you

In addition, our after-salesservice department is flankedby a group of experiencedfield engineers. We provideconstant support to theseteam members to ensure thatcomplex queries are solvedfast and accurately.

We maintain the most advanced test and inspectionfacilities:● 3D gear teeth measurement● 3D coordinate measure-

ment machine● crack testing, surface

testing and ultrasonictesting

● endoscope for inspectingthe inside

Upon completion of the analysis, you will receive anexamination report includingsuggestions and recommen-dations as how to proceed.

RENK AktiengesellschaftRheine PlantServiceRodder Damm 17048432 RheineGermanyPhone: +49 59 71 / 790 260Fax: +49 59 71 / 790 444E-Mail: rheine@renk-ag.comInternet: http://www.renk.de

3D measurement machine

Gearing measurement Inspection of a high-speed gearbox

once the ordered gearbox orcoupling has left our factory.The Service Team can becontacted at any time toassist you with any questi-ons or problems you have.

Further products of our range of couplings

1 Curved tooth coupling with hardened andground external and internal teeth and tooth-by-tooth injection lubrication

2 High-speed diaphragm couplingType MCN

3 Raflex® steel disk coupling Type MTP according to API 610

RENK Aktiengesellschaft Rheine works

Rodder Damm 170 D-48432 Rheine

Telephone: ++49 5971 790-0 Telefax: ++49 5971 790 208 und 790 256

E-mail: info.rheine@renk.biz Internet: http://www.renk.eu

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