What are the types of reasons for a broken valve spring seat?

The reason why the valve spring is broken is that when there is a defect on the surface of the valve spring, there may be a concentration of stress that can occur at this defect, leading to the early breaking of the spring. The specific reasons for the valve spring seat being broken are:

In addition to manufacturing defects, improper use can also cause early damage. There are pits and corrosion pits on the surface of the spring. If the spring surface is damaged due to improper storage, it is easy to cause stress concentration at the corrosion pit, leading to fatigue fracture of the spring;

The two end faces of the spring are skewed from the center line of the spring. If the two end faces of the valve spring are not perpendicular to the center line of the spring, the spring will work at high speed for a long time, and the metal material will easily break due to fatigue;

3. The valve guide or cam bearing is loose. If the valve conduit jumps during use, it may cause the valve spring to break during compression, causing the shaft to withstand bending.

There are two types of valve spring seats. The valve spring is a cylindrical spiral spring, with one end supported on the cylinder head (body) and the other end pressed against the spring seat at the valve stem end. The spring seat is fixed to the end of the valve stem with a lock. The following are the functions of the valve spring:

The function of the valve spring is to ensure that the valve is correctly reset, that is, to overcome the gap between the inertia forces of the valve and transmission components, ensure that the valve is seated in time, and closely cooperate to prevent damage to the seal during engine vibration;

"One end of the valve spring is supported on the cylinder head, and the other end is pressed against the spring seat at the end of the valve stem, which is fixed to the end of the valve stem with a lock ring or pin;";

In order to ensure that the spring has sufficient stiffness and installation preload, the valve spring is mainly made of high carbon manganese steel or chrome vanadium steel wire. Silicon clad steel wire. The valve spring is generally made of cylindrical equal pitch springs. When installing the valve spring in the engine, unequal pitch springs are used to prevent co vibration.