Large-scale Gear Research Articles

Traceable metrology for large involute gears

Renewable energy systems are becoming more important due to the current energy transition, where the main share of renewables is derived from wind energy systems. However, failure rates due to critical drivetrain components need to be significantly reduced. Traceable quality management is necessary, but has not yet been established for the large-scale workpieces and their quality assurance. Measurement standards need to be made available for the manufacturing industry. A novel involute gear measurement standard with a diameter of about two metres has therefore been developed. After the first worldwide calibration process of a large-scale gear had been conducted, the measurement standard was used for an intercomparison between seven participants. Apart from the development of this measurement standard, the establishment of a calibration service was initiated, so that setting up quality assurance for large-scale gears is possible in the future.

Dynamic Simulation and Analysis of Large-Scale Gear Reducers

This study has established the equivalent CAE model of a loading large-scale gear reducer for simulating and evaluating the dynamic responses, including the rotation speeds of shafts and meshing forces of gear pairs, in the time and frequency domains by using MSC.ADAMS. The transient response results were compared with measurement data under the practical application to verify reliability and equivalence of the constructed CAE model. The proposed approach and model may be served as the basis to access the transmission performance, vibration analysis, failure diagnosis and even structure improvement for the large gear reducers.