Beschreibung
Vorteile und Besonderheiten
Hauptmerkmale
Typische Anwendungen
Komponenten und Aufbau
Messverfahren und -ablauf
Software und Bedienung
Ergebnisse, Datenformate und Schnittstellen
Normen und Richtlinien
FAQ
Description
The TBT turbine and compressor blade test stand for small blades comprises a PLC-controlled hydraulic system, a two-hand control unit, a clamping unit, an automatic modal hammer, the sensors, a data acquisition module, and a standard or industrial PC with software, all integrated into a compact test stand made of aluminium profiles. The test stand configuration can be adapted to the customer’s application.
The PLC controls the proportional valves for pre-clamping, clamping and regulating the clamping force during the vibration measurement. With PLC-controlled hydraulics, clamping forces of up to 140kN are possible. The accumulators ensure that the clamping forces remain stable even during experimental measurements lasting more than 20min.
Advantages & Innovation
- Cost and time savings thanks to low personnel requirements
- Automated test system for determining natural frequencies
- Test procedures in accordance with internal company regulations
- Scalable for different blade types and sizes
- Different clamping blocks depending on blade size
- Software-controlled hydraulic clamping of the component
- Easy to use
- Excitation by automatic modal hammer
- Non-destructive testing (NDT)
- Bounce-free excitation
- High reproducibility
- Vibration measurement using a laser Doppler vibrometer, microphone or accelerometer
- Frequency ranges up to 100kHz
- Highest accuracy with a frequency resolution of <1Hz at 20kHz
- Automatic measurement report generation
- SQL database for multiple workstations
- Blade database
- Project-orientated database structure
- 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
- Eigenvalue determination of turbine, compressor and engine blades
- Eigenvalue determination of gas and steam turbine blades
- Turbine blade reworking
- Product testing
- Prototype studies
- Research and development
- Machine diagnostics
- Early damage detection
- Material testing
Components
Excitation unit
The broadband excitation is carried out with an automatic modal hammer
- Frequency ranges up to 60kHz
- Impact forces up to 150N
- High reproducibility
Vibration sensor
The TBT can be operated with the following vibration sensors
- Laser Doppler vibrometer
- Microphone
- Accelerometer
Measurement data acquisition
4-channel measuring system with synchronous scanning
- AC, DC and IEPE coupling
- Anti-aliasing filter
- 24-bit resolution
- Measurement range up to 100kHz
- 100 to 25,600 FFT lines
Clamping
- PLC-controlled hydraulics or customer’s existing clamping fixture
- Two-hand control (can be configured for one-hand operation) based on the risk assessment in accordance with EN ISO 12100
Windows PC
- Standard or industrial PC, also according to customer requirements, with Windows 10/11
Test stand configurator
| TBT for small blades | TBT for large blades | |
|---|---|---|
| Excitation | Automatic modal hammer | Hammer without measuring cell, hammer with measuring cell or automatic modal hammer |
| Clamping | PLC-controlled hydraulics or customer’s existing clamping | PLC-controlled hydraulics or customer’s existing clamping |
| Vibration sensors | Laser (LDV), microphone or accelerometer | Laser (LDV), microphone or accelerometer |
| Monitoring sensors | Clamping pressure, temperature | Clamping pressure, temperature |
Software
The TBT software controls the entire test process. It includes user management, management of test objects, work orders, measurements and analyses, as well as documentation and report generation.
Specification of the test object
- Name and meta data
- dB values for attenuation calculation (0.5 to 3dB)
- Selectable frequency ranges up to 100kHz
- Selectable amount of FFT lines
- Frequency bands and permissible tolerance ranges
Measuring sequence according to a task
- Series measurement
- Repeat measurement
- Master blade measurement
Automatic measurement procedure
- 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 natural frequency determination, we design, plan and develop customer-specific solutions to meet your requirements. We are also happy to carry out the measurements for you as a service.
Please contact us—we will be happy to provide you with a quote.