PORTABLE KAHN SERIES DYNAMOMETERS FOR …

1 10 2 kahn INDUSTRIES, SERIESPORTABLEDYNAMOMETERSFOR TESTINGAEROSPACETURBINESKAHN SERIES 102 HYDRAULICDYNAMOMETERS FOR LOADTESTING aerospace ENGINESD esigned primarily for steady-state and transient per-formance testing of medium speed turboshaft engines andsmall turboprop engines, the kahn SERIES 102 productline includes five standard models capable of absorbingup to 3000 hp (2240 kW) and operating at rotationalspeeds up to 11,000 in engine test facilities around the world,the SERIES 102 offer long service life coupled with mini-mum maintenance requirements. All units are fullycompatible with advanced, fast-response FADEC (FullAuthority Digital Electronic Control) engine control sys-tems and meet or exceed the test specifications of allcurrent turboshaft and small turboprop engines, includ-ing the following:Honeywell: AGT1500, LTS101, LTP101, T53, TPE331/T76 Pratt & Whitney: PT6A, PT6B, PT6T/T400, PW200 Rolls-Royce: 250-B, 250-C/T63, GemTurbomeca: Arriel, Arrius, Artouste, AstazouConsortium: BENEFITSB uilt to meet the most demanding engine test require-ments, the kahn SERIES 102 DYNAMOMETERS offer a num-ber of important design benefits.

2 Easy to install and to operate. Flange mounted configuration permits alignment-freeinstallation directly to the engine or the flywheel. Stainless steel power elements are highly cavitationand corrosion resistant providing superior service life. Positive sealing assures quick and safe emergencyshutdowns. Positive sealing permits operation at all attitude posi-tions from horizontal to vertical. Perforated disc power elements absorb full power inboth directions of rotation. Inherently steep, open-loop torque speed characteris-tic assures stable steady-state operation. Low moments of inertia and small internal water vol-umes permit rapid transient response.

3 Grease lubrication eliminates environmental hazardsassociated with oil-mist lubrication. Simple modular design concept permits quick overhaulby the 102 hydraulic DYNAMOMETERS feature two sets ofpower elements (rotors and stators) capable of fully bi-directional operation. The power elements are madefrom highly cavitation and corrosion resistant stainlesssteel. This material is also used for the shaft and otherrotating rotor assembly is supported by grease-packed,spring-loaded precision ball bearings. Through the useof advanced, highly water-resistant high-speed greases, kahn has eliminated the environmental hazards associ-ated with oil-mist lubrication.

4 To assure smooth, vibra-tion-free operation, the rotor assembly is dynamicallybalanced in accordance with high-speed turbine sealing between the water and bearing com-partments is accomplished with a mechanical carbon faceseal. This feature permits operation of the dynamometerunder all conditions including zero speed. Unlike withlabyrinth seals, there is no need to unload the dynamom-eter during shutdowns to prevent water from entering dynamometer module is supported in the trunnionmount by rugged, tapered roller type trunnion results in smooth, vibration-free operation under themost severe operating conditions as well as excellenttorque measurement a simple modular design concept, theSeries 102 DYNAMOMETERS consist of less than 30 com-ponents (excluding assembly hardware).

5 Their simple de-sign requires only minimum maintenance and allows forquick field Perforated Disk Rotors6 Trunnion Mount2 Shaft7 Shaft Bearings3 Housing Cap8 Trunnion Bearings 4 Endcap9 Carbon Face Seal5 Housing Ring10 60-tooth GearPOWER ABSORPTION MECHANISMThe power output from the engine is absorbed by watervortices generated in the perforated disc rotors andstators. The resulting drag applies a moment to thedynamometer housing which is measured by a strain-gage load cell mounted to the torque power is controlled by modulating theamount of water in the dynamometer with the inlet andoutlet control REQUIREMENTSA continuous flow of water through the dynamometer isrequired to provide resistance to rotation and to removethe heat generated by the power absorption on a maximum water outlet temperature of140 F (60 C), water flow requirements range from4 gal/hr hp (20 l/hr kW) for once through water systemsto 6 gal/hr hp (30 l/hr kW)

6 For recirculating water following water flow rate and temperature dataapply for installations using recirculating systems withevaporative cooling towers:Specific Water Flow gal/hr hp (30 l/hr kW)Water Supply Pressure50 psig ( bar)Water Inlet Temperature90 F (32 C)Water Outlet Temperature 140 F (60 C)Filtration40-mesh screen(340 micron) 1200 11000900285102-130 180090001600285102-160 240072002400375102-200 300060003000750102-240 300045004000880 OPERATING RANGEMODEL102-130No. 6014. Printed in 102-130 PORTABLE dynamometermounted via adapter and quill shaftdirectly to T53 turboshaft CONTROL SERIES 514 Two fast-acting electro-pneumatic valves for fastdynamometer control with the ability to conducttransient testing .

7 testing applications include speed governed enginesand gas CONTROL SERIES 545 Latest generation design, with adaptive control. Very fast control capability to meet the mostdemanding steady-state and transient test require-ments for dynamometer control when testing aircraftengines and experimental gas turbines. Electro-hydraulic valves for fastest control, with fullstroke in less than 100 milliseconds, allows the dyna-mometer control system to be faster than most enginecontrol systems. Manual mode and three closed loop automatic modesfor flexible control of all engine types: Automatic speed control Automatic torque control Automatic power law relationship betweenspeed and torque.

8 Numerous features to suit the application and user: Bumpless transfer Storage/retrieval of multiple PID settings Built-in speed calibration Pushbutton selectable English and metricunits Demand signal displayENGINE TEST STANDS SERIES 505 Manufactured from rectangular structural steel, theengine test stands are designed to rigidly support boththe dynamometer and the engine during the performancetest. Stationary and/or mobile engine test stands are avail-able for a wide variety of diesel, turboprop and turboshaftengines, including the latest generation of high speedgas turbine engines. Each stand is fully analyzed toensure that it is rigid and that trouble-free operation isinherent in the design.

9 Static finite element computer analysis eliminates shaftmisalignment due to deflections under engine loads. Dynamic finite element computer analysis ensuresfreedom from harmful vibration, whether due to a forcedvibration or a resonant INDUSTRIES, Wells Road, Wethersfield, CT 06109 Phone (860) 529-8643 Fax (860) 529-1895 E-mail The information included herein was correct at the time of publication and supersedes all previous data. It is our policy to continually improve our products to insure even better performance. Consequently, current kahn products may incorporate modifications not shown on these pages.