Year: 2018 Volume: 1 Issue: 1 Page: 14-19
IMPROVEMENT OF DISENGAGEMENT PERFORMANCE BY CHANGING THE FORM OF DIAPHRAGM SPRING WHICH USED IN 350 MM DIAMETER CLUTCH COVER ASSEMBLY OF HEAVY COMMERCIAL VEHICLES
MURAT HAKTANIR, ERDEM ZORER, SAMET KABACAOĞLU
In this study, how the form change on a specific diaphragm spring effects to disengagement performance of a related clutch system was investigated using numerical and experimental methods.
In the vehicle which the former clutch cover assembly design is operated, the hydraulic system of the fork mechanism that causes the movement of the release bearing is weakened over time. This problem caused a reduction of the operating range on release bearing. As a result of this, clutch cover assembly could not provide sufficient separation and it has reduced product performance. To solve this problem, a three-dimensional model of the problematic diaphragm spring was created using solid modeling module of SIEMENS NX software version 8.0. Later, structural analysis was completed by running the three-dimensional model on ANSYS Workbench software version 17. In order to improve performance on the basis of the obtained analysis results, a new diaphragm spring model was created by giving a new form over the diaphragm spring model. To comparing differences between previous model with the new model, the new model analyzed structurally. Endly, to experimentally verify the data obtained from the analyzes, one clutch cover assembly which has the old diaphragm spring design and one clutch cover assembly which has the new diaphragm spring design were manufactured and these assemblies subjected into a performance test. In conclusion, when both performance tests and analysis results are taken into consideration, it is seen that the finger stiffness of the new diaphragm spring design increases, resulting in a better separation performance in the clutch system compared to the previous model and the clutch release point is pulled forward. As a result of these improvements, disengagement problems caused by the specified clutch cover assembly have been avoided.
Anahtar Kelimeler (Keywords): Clutch systems, FEA methods, Release bearing, Design