performing gear

NT Series Chongqing Cummins, Dongfeng Cummins diesel engine crankshaft flywheel combined group by the crankshaft, crankshaft gears, Precision bearing  starting ring gear, flywheel and pulleys and other components. NT series diesel engine crankshaft is integral with the overall steel forging. This is characterized by the crankshaft main journal, the crank and connecting rod journal is made a whole. The front shaft end fitted with two belt groove V-belt drive, drag, directly or indirectly, fans, pumps and charger pulley. Rear crankshaft with six screws through the flange connections and tighten flywheel with two cylindrical pin positioning. In the end face of the flywheel with 12 chrome uniform mending holes for mounting couplings and other power output device, start with the flywheel ring gear sleeve surface.As the spindle neck structure is different, the first gear bearing the same 1,3,5, 2,4,6 same block, 7th gear bearing specific, and each block has hole tile, sheet pile for safety in the 7th gear bearing cover , thin-walled aluminum alloy main bearing bushing, upper and lower watts watts with the main bearing bolts tightened, there are tiles on the hole and the tank, and with the hole in the spindle neck interlinked, lubricating oil from the hole circulate to forced lubrication main bearings and connecting rod journal friction surface friction surfaces. After assembling the crankshaft flywheel assembly, turn the hand crank on the flywheel side should be very flexible.
SHAFTSingle-cylinder diesel engine repair balance shaft fracture should be taken to remove the cause. Now led to the balance shaft fracture of the reasons summarized as follows:
(A) Cylindrical roller bearing Songkuang. The so-called balance shaft bearings Songkuang, causing abnormal wear bore a common cause of poor balance for the engine, mobile bearing operation is not flexible, balance shaft ends bore concentricity tolerance, balance shaft axial clearance is too big. Bore wear increases, the running balance bearing unduly impact load, resulting in balance shaft fracture.
(Two) assembly errors. In the diesel engine disassembly, repair process, will sometimes balance shafts installed wrong, for example, when you install the timing gear timing mark installed wrong. Then balance the alert not only can not play a balancing role, it will lead to higher vibration, resulting in the balance shaft fracture.
(C) performing gear. Balancer shaft gear and the gear meshing with the axis equal degree of tolerance, meshed gears in the transmission occurs during sticking, the balance shaft by cyclic bending stresses, resulting in fatigue fracture balance shafts.