Respuesta :
In a diesel generator set, flexible couplings are frequently utilized to accommodate various imperfections including misalignments and torque variations. On the other hand, severe vibration brought on by frequent engine misfires can result in premature failures of the couplings as well as the entire generator set.
- Additionally, the connection has an impact on early misfires brought on by problems with fuel injection and cylinder seals as well as detection performance.
- This study examines both theoretically and experimentally the torsional vibration and dynamic torque of the flexible coupling that connects a 6-cylinder diesel engine to a dynamometer.
Methods
- This system is a typical diesel generator set that has been transformed using the Lagrange equation method into a 10-DOF torsional dynamic system.
- The model is used to predict the effects of various misfire conditions on the dynamic torque on the coupling after the model has been verified by measuring vibration responses at the free end and the coupling with a magnetic speed sensor and a wireless torque sensor.
- This aids in the development of reliable diagnostic features for misfire detection and diagnosis.
Results and Interpretations
- Results indicate that the torsional vibration and load of the flexible coupling are significantly influenced by diesel engine misfires (more than five times more) than the dynamic torque is.
- Although both the torque of the flexible coupling and the torsional vibration can be used to detect the occurrence of diesel engine misfires, the vibration somewhat outperforms the torque in terms of pinpointing the misfired cylinders.
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