Test Devices Inc. New Generation Of Spin Rigs Creates Realistic Engine Operating Conditions

December 15, 2008

Dr. Boris Milatovic of Test Devices Inc., a dynamic materials testing company, recently presented his paper “Dynamic Spin Rigs – The Next Generation in Component Test Capability,” at the 2nd Joint EVI-GTI / PIWG International Gas Turbine Instrumentation Conference. The paper highlighted the unique testing capabilities and advantages of Test Devices Inc.’s exclusive Dynamic Spin Rigs.

While standard spin rigs are designed to test the static (centrifugal) stress capability of turbine components, Dynamic Spin Rigs can test both static (centrifugal) and dynamic (vibrational) stresses, creating a more realistic environment outside of a real life engine test.

As the Director of Advanced Technology Programs at Test Devices Inc., Dr. Milatovic was one of several leading engineers responsible for the development and building of the Dynamic Spin Rig. “The key feature of the Dynamic Spin Rig is the excitation of the blades while spinning,” said Dr. Milatovic. “In the test, jets of oil strike the blades, which produce an impact force on the blades. As a result, the blades vibrate at certain controlled frequencies, allowing us to fully replicate engine operating conditions.”

The Dynamic Spin Rigs have the capability of performing all of the conventional standard rig tests, as well as advanced capabilities such as Thermal Gradient testing, Rotor Thermo-Mechanical Fatigue spin testing, Dynamic Blade Response testing, Elastic and Plastic Component Growth Measurement, Real-Time Crack Detection and Validation of Goodman
Diagrams. These advanced tests can speed project completion, reduce total testing costs, lower the risk of in-service component failures, and reduce the amount of engineering redesigns.

Test Devices Inc. is the only testing service that manufactures and offers test services using the Dynamic Spin Rig. Each Dynamic Spin Rig can be modified to the specifications of the components that are being tested. Recently, Test Devices Inc. installed its first Dynamic Spin Rig outside of its facilities, at a major turbine original equipment manufacturer. The rig is
currently in full operation and is being used for various engine development programs.


About Test Devices
For over 30 years, Test Devices, Inc. has been the world’s premier source for rotational testing equipment and services. Test Devices provides advanced technology spin testing services to customers in a wide variety of industries. The company works with developers and producers of high-speed rotational components of jet engines, gas turbines, medical centrifuges, machine tools, industrial compressors, and high-speed electric motors, among others. For more information contact David Woodford at +1-978-562-4923, woodford@testdevices.com, or visit www.testdevices.com.