.png?width=200&height=45&name=Design%20ohne%20Titel(50).png){kind=small}
Analyses in the time domain
Load-dependent gearbox stiffness
Analyses in the spectral range
Analysis of the tooth mesh by forming order or frequency spectra.
Visualisation of 3D sequences by linking the spectra from several individual measurements, e.g. via load or speed.
Formation of 2D sectional representations via load or speed for the selection of individual orders or frequencies.
2D visualisation for investigating correlations between transmission errors and structure-borne noise emissions.
Transmission error (TE)
Every gearbox and the individual parts installed in it are subject to manufacturing tolerances that vary depending on the intended use and location of the assembly.
These manufacturing tolerances in combination with:
temperature and load-dependent component elasticities andthe transmission function of the rotary motion and torque deviates from the ideal transmission function.
This phenomenon is referred to astransmission error (TE).
Analysis and measurement technology
Both design-related influences - such as differences between spur gears and planetary gears - and meshing errors can be analysed in detail using suitable measurement technology.
Powerful analysis software can be used to analyse:
Generateorder and frequency spectra in 2D and 3D visualisation
Recognisecorrelations between transmission errors and structure-borne noise emissions
High-resolution incremental sensors are applied to the gearbox input and output shafts to record the measurement data.
Causes and effects
The more complex the structure of a gearbox - i.e. the more gear stages, shafts, gears and bearings it contains - the greater the sum of the individual transmission errors.
The consequences of these errors manifest themselves in
Increased macroscopic and microscopic wear on components and surfaces
Emission of structure-borne noise and noise that is acoustically perceptible
It is therefore essential to measure the transmission error in order to quantify and evaluate each individual gear stage.
Compensation of measurement errors
Eccentricities or shaft impacts can cause measurement errors. The use of two speed sensors offset by 180° is therefore highly recommendedfor large shaft diameters .
This configuration allows measurement errors to be compensated for directly in the analysis software.
Various sensor types are available depending on the shaft diameter :
One-piece hollow shaft encoders
Two-partsensors with a separate sensor head and a magnetic tape that spans the shaft
Ideally, additional speed sensors are installed on the intermediate
installed on the intermediate shafts inside the gearbox. At the same time, structure-borne noise is measured using acceleration sensors at different positions in the gearbox.
gearbox.