Using the vibration test stand, you can perform time- and cost-efficient component tests on turbines, engines, and blades in accordance with your specifications. The high frequency resolution enables frequency determination with an accuracy of <1Hz — as required for measurements on master blades. Determination of blade resonances and modal parameters is fully automated and does not require expert-level knowledge from operating personnel. Thanks to project-based organization within a database, all measurements remain clearly traceable at all times.
Description
Advantages & Innovation
- Cost and time savings thanks to low personnel costs
- Automated test system for determining natural frequencies and damping
- Test procedures in accordance with internal company regulations
- Scalable for different shovel types and sizes
- Different clamping blocks depending on blade size
- Software controlled hydraulic clamping (optional)
- Easy to use
- Excitation by automatic modal hammer
- Vibration measurement with a microphone, laser Doppler vibrometer or accelerometer
- Frequency range up to 100kHz
- Frequency resolution <1Hz to 20kHz
- Automatic measurement report generation
- Project-orientated database structure
- SQL database for multiple workstations
- Blade database
- Export to Excel, ASCII or SAP
- DAkkS calibration (DIN EN ISO/IEC 17025) possible
Application & Integration
- Master blade measurement
- Quality control
- 100% inspection
- End-of-line testing
- Series testing
- Determination of resonances
- Determination of eigenvalues
- Component testing of aviation engines
- Component tests for gas and steam turbines
- Shovel reworking / post-processing
- Product testing
- Prototype studies
- Research and development
- Machine diagnostics
- Early damage detection
- Material testing
Components
Excitation unit
The broadband excitation is carried out with a manual or automatic modal hammer
- Frequency ranges up to 40kHz
- Impact forces up to 2500N
- High reproducibility
Vibration sensor
The VTS can be operated with the following vibration sensors
- Microphone
- Laser Doppler vibrometer
- Accelerometer
Measurement data acquisition
4-channel measuring system with synchronous scanning
- AC, DC and IEPE coupling
- Anti-aliasing filter
- 24-bit resolution
- Frequency ranges 1 to 100kHz
- Frequency resolution 100 to 26500 FFT lines
Windows PC
- Standard or industrial PC, also according to customer requirements, with Windows 10/11
Standard test stands
MAUL-THEET offers three different standard configurations for determining the natural frequencies. In addition, inputs for pressure and temperature measurement are available.
VTS test stand configurator
| Test stand | VTS with customer-specific hydraulics | VTS with manual hydraulics | VTS with PLC controlled hydraulics |
|---|---|---|---|
| Excitation | Hammer without measuring cell, hammer with measuring cell or automatic modal hammer | Hammer without measuring cell, hammer with measuring cell or automatic modal hammer | Hammer without measuring cell, hammer with measuring cell or automatic modal hammer |
| Clamping | Customer's clamping | hydraulic, manual | hydraulic, PLC-controlled |
| Vibration sensors | Microphone, laser (LDV) or accelerometer | Microphone, laser (LDV) or accelerometer | Microphone, laser (LDV) or accelerometer |
| Monitoring sensors | Pressure clamping (optional) or temperature (optional) | Pressure clamping (included) or temperature (optional) | Pressure clamping (included) or temperature (optional) |
Software
The VTS software controls the entire testing process. It includes user management, management of test objects, work orders, measurements, analyzes as well as documentation and report creation.
Specification of the test object
- Name and meta data
- dB values for attenuation calculation (0.5 to 3dB)
- Frequency range 1 to 40kHz selectable
- Frequency resolution (number of FFT lines) selectable
- Frequency bands and permissible tolerance ranges
Measuring sequence according to a task
- Series measurement
- Repeat measurement
- Master blade measurement
Automatic measurement procedure
- Manual shock excitation or triggering the automatic modal hammer
- Measurement of the excitation force (if present) and the vibration response
- Averaging the FRF or response spectrum
- Peak picking and quality assessment
Report creation and output of results for each job as a table
- Printer, PDF, Excel, CSV, etc.
What we can do for you
In addition to manufacturing and supplying standard measurement systems for determining natural frequency and damping, we design, plan, and develop customized solutions tailored to your requirements. We are also happy to perform the measurements for you as a service.
Please contact us, we will be happy to make you an offer.