Analysis on the Causes of the Failure of Camshaft and Timing Gear

 

The structural characteristics (long and thin) and working characteristics of the camshaft (periodically bear uneven load), prompting it to produce journal and bearing wear, out of roundness and bending of the entire axis during operation; cam and valve The relative movement of the parts causes the cam profile and height to be worn out. As the bearing is worn and loose, it will aggravate the bending of the axis. The bending of the axis will promote the wear of oil pump gears, timing gears, journals and bearings, and even cause noise and tooth breakage during gear operation, and the spherical surface of the valve lifter will not rotate flexibly; accelerate the wear of the cam and cause the journal to lose The roundness and taper are out of tolerance, etc.