.png?width=500&height=113&name=Design%20ohne%20Titel(50).png)
.png?width=250&height=74&name=Rotec%20%20Logo%20HELL%20(1).png)
.png?width=300&height=89&name=Rotec%20%20Logo%20HELL%20(1).png)
.png?width=1995&height=593&name=Rotec%20%20Logo%20HELL%20(1).png)
ROTEC · Measurement applications
Transmission error in wind turbine gearboxes
Measure input and output shaft motion, evaluate transmission error and compare it with structure-borne sound.
Measurement task and objective
Investigate transmission error, structure-borne sound, audible noise and mechanical loading in wind turbine gearboxes. Results support gearbox design and the assessment of noise-related behaviour.
ROTEC ENGINEERING can provide measurement installation, on-site measurements, analysis and evaluation within the agreed project scope.
Time-domain analysis
- Dynamic angle of twist between the gearbox input and output shafts.
- Load-dependent gearbox stiffness.
- Vibration and structure-borne sound behaviour evaluated across operating conditions.
Spectral analysis
- Analyse gear meshing using order and frequency spectra.
- Combine spectra from individual measurements into 3D sequences over load or speed.
- Extract 2D sections for selected orders or frequencies.
- Investigate correlations between transmission error and structure-borne sound.
Transmission error (TE)
Manufacturing tolerances, temperature- and load-dependent component elasticity and assembly influences can cause the actual angular transmission to differ from the ideal relationship. This deviation is described as transmission error.
The measurement task should account for the gearbox design and the operating conditions under investigation.
Measurement and analysis
Suitable measurement technology helps investigate design-related influences, including differences between spur and planetary gearboxes, as well as gear-meshing effects.
High-resolution incremental sensors are fitted to the input and output shafts. Analysis software provides 2D and 3D order and frequency spectra and supports comparison of transmission error with structure-borne sound.
Causes and possible effects
A gearbox with more stages, shafts, gears and bearings introduces more influences that must be considered when assessing overall transmission error.
Possible effects include component and surface wear, structure-borne sound and audible noise. Measuring the individual stages can help quantify their behaviour rather than assuming that all contributions simply add in the same way.
Compensating for measurement influences
Eccentricity and shaft runout can influence the measurement. For large shaft diameters, the source recommends considering two speed sensors positioned 180° apart so that appropriate compensation can be applied in the analysis software.
Depending on the shaft diameter and installation, options include one-piece hollow-shaft encoders or a separate sensor head with a magnetic tape around the shaft. Additional sensors on intermediate shafts can provide further information. Accelerometers at different gearbox locations record structure-borne sound.
Questions and answers
What is RAS, and what does the ROTEC rotational analysis solution include?
The ROTEC Rotational Analysis System (RAS) is used to analyse rotating components in mechanical engineering, automotive development, power generation and motorsport. It combines high-resolution counter-based acquisition with an angle-based approach to rotational speed measurement and analysis.
The measurement chain includes optical and magnetic speed sensors, signal-conditioning adapters, the modular RASdelta measurement system and specialised measurement and analysis software. The angle-based approach can help identify sensor vibration and other measurement influences during evaluation. ROTEC ENGINEERING supports demanding measurement tasks.
Can the measurement system and software be configured for a specific application?
RASdelta is a modular measurement front end. The source describes configurations with 8 or 16 measurement cards, selected to suit the measurement task. RAS software provides tools for analysing rotating components and complex systems without requiring users to write their own measurement or analysis programs.
ROTEC ENGINEERING can advise on application-specific measurement questions and the selection of a suitable configuration.
Does ROTEC also provide engineering and project support?
Alongside sensors, signal conditioning, data acquisition and analysis software, ROTEC provides engineering and consulting services. These include measurement-point design in CAD, component machining, sensor installation and calibration, measurement execution, data evaluation and presentation of results.
Project support can cover individual work packages as well as a wider measurement project, according to the agreed scope.
Is training available for commissioning and using a measurement system?
ROTEC offers its Training Week in German and English as well as application-specific user training. Training can combine measurement principles, a detailed introduction to the software and practical demonstration measurements in the user’s environment.
Support is also available when commissioning a new system and becoming familiar with the settings and functions of RAS software.
How can users access support and self-help information?
The Munich sales and support team serves Central Europe, supported by local partners in other markets. Partners assist with measurement technology, first-level support and sales enquiries.
ROTEC also provides a knowledge base with registration-based access to information on topics including torsional vibration, transmission error and valve train analysis. Contact the team to discuss the appropriate support route for your application.
Discuss your measurement task with ROTEC
ROTEC ENGINEERING supports measurement-system selection, installation, testing and evaluation to suit your application.
.png)
.png)
%20(2).png)
%20(5).png)
.png)
.png)
