Testing Services
| STI provides a unique combination of traditional machine testing services and advanced analytical techniques. STI is a leader in providing machine testing and diagnostic services for turbomachinery, machine tools, cutting tools, turbine blades, mechanical systems, structures, rotating machinery and more. In addition, utilizing state-of-the-art equipment and customized software we diagnose the onset of mechanical vibration faults, performance degradation and component remaining life. |
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STI testing services include:
- Vibration Testing, Analysis and Diagnosis
- Modal Testing Capabilities
- Quality Control Blade Frequency Testing
- Moment Weigh
- Strain Gage Testing
- Pressure, Force and Torque Measurements
- Data Aquisition and Reduction
- Equipment Rental
- Flow Path Transverse Testing
- Steam Wetness Measurements
Vibration Testing, Analysis and Diagnosis
STI provides a number of services related to vibration measurement for both rotating and stationary components:
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IMI Sensors, a Division of PCB Piezotronics, Inc. offers a wide range of vibratory test and measurement solutions for rugged and demanding industrial applications.
- Natural frequencies, mode shapes and operational deflection shapes(ODS) of rotating and stationary components
- On-site testing
- Generation of key verification data for FE computer models used in the failure analysis.
- measurements of blade-disk vibrations
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Experience on more than 300 different structures.
Quality Control Blade Frequency Testing
"Refurbished or reverse-engineered turbine blades are
frequency-tested to ensure compliance with original
equipment specifications.
This is especially critical for longer tuned blades
that are susceptible to high-cycle fatigue failure
due to operating resonances. STI Technologies has
conducted quality control frequency testing of blades
for over 20 years.
Download the Machine Testing and Diagnostics Services Brochure (pdf format)
Moment Weigh
STI provides moment weigh and the loading sequence for
turbine blades. Data is collected (blade weight and
center of gravity information) and used in a special
software subroutine that will determine the exact
blade stacking position (loading chart).
Strain Gage Testing - Stationary and Rotating
Telemetry Capabilities
- Verify analytical models
- Establish safe operating loads
- Applicable to high temperatures and aggressive environments
Telemetry services include:
- Selection of gage size and type, number of gages.
- Recommended bonding methods, and gage orientation.
- Considerations of temperature, test duration and required accuracy.
- Practical strategies for dealing with lead wire paths, connection terminals, clearances and gage protection.
Download the Machine Testing and Diagnostics Services Brochure
Custom Measurement Instruments (Transducers)
In partnership with the PCB Group, STI Technologies Inc. can provide customized measurement instruments to meet specific needs. Applications range from smart sensors and wireless transducers, special mounting or installation requirements, data acquisition systems and customized software applications to process the data.
Pressure, Force, Torque and Acoustic Measurements
STI Technologies Inc. is uniquely positioned, through
its relationship with the PCB Group of companies, to
offer a range of pressure, force, torque and acoustic
measurement services and a full range of data analysis tools
for evaluation and resolution, as well as access to a
host of pressure, force, torque and acoustic sensing devices.
PCB Piezotronics, Inc.Back To Top
PCB, Pressure and Force Sensors
Key Transducers, Inc.
Larson Davis
Data Acquisition and Reduction
STI offers custom virtual instrument design with LABVIEW
software and National Instruments data aquisition cards.
Calibration systems include shock accelerometer calibration
based on Hopkinson bar, transverse sensitivity, calibration
of accelerometers at various temperatures (includes
environmental chamber temperature control, shaker motion
control, data acquisition and processing) as well as data
aquisition and processing systems for turbomachinery and
general vibration applications. Experience indicates that
virtual instruments provide significant cost reduction
through flexibility.
Download the Machine Testing and Diagnostics Services Brochure.
Equipment Rental
STI and our affiliates have a large selection of test
equipment available for rent. A partial listing includes:
- Accelerometers
- Acoustic transducers
- Array microphones
- Cables, accessories and adaptors
- Variety of data acquisition and analysis equipment
- Dosimetry
- Environmental systems
- Force sensors
- Handheld accelerometer calibrators
- Impact Hammers
- Microphone power supplies/preamplifiers
- Signal conditioning
- Sonic Digitizers
- Sound Level meters
- Tachometers
Download the Machine Testing and Diagnostics Services Brochure
Flow Path Traverse Testing
Field tests can be performed within the flow path of
operating steam turbines to measure span-wise
distributions of pressure, velocity, and flow angles.
These tests, performed using pitot-static probes and
developed under the sponsorship of EPRI, help diagnose
steam path design problems and produce flow conditions
for subsequent CFD stage models.
Steam Wetness Measurements
A custom optical probe is used to characterize the quantity
of condensed steam in two-phase flow near the turbine exhaust.
The wetness probe is traversed to yield span-wise
distributions of wetness. Both
test equipment and procedures were developed
under the sponsorship of EPRI.
