What is a valve spring seat?

What is a valve spring seat?

The valve spring is a type of valve spring that can ensure that the valves fall down in time and stay close together. When the engine vibrates, it can prevent the valve from jumping and damage the valve seal. The valve body spring is located between the cylinder head and the spring seat at the end of the valve rod. It is mostly made of high-quality alloy steel wire and has undergone heat treatment to improve fatigue strength. To avoid spring corrosion, the spring surface should be galvanized and phosphated, and the surfaces at both ends of the spring must be flat and perpendicular to the spring shaft to prevent the spring from being tilted during operation. The function of the valve spring is to overcome the inertial force of the valve and transmission components during the valve closing process, prevent the gap between the transmission components due to the inertial force, ensure the timely installation and tight fitting of the valve, and prevent the valve from bouncing during engine vibration, thereby damaging its sealing performance.

The engine valve springs are mostly intake and exhaust separated, but do not require front and rear separation. The difference mainly includes the following points: the air inlet is slightly thicker than the exhaust port, mainly for the rapid response of the air inlet; The air inlet is sparse compared to the exhaust spring; The original factory has paint dot marks, three point intake, five point exhaust, and the old model is green in and red out.

The valve spring is a type of spring that can ensure that the valves fall down in time and stay close together. When the engine vibrates, it prevents the valve from jumping, causing damage to the valve seal. The valve springs produced by valve spring seat manufacturers mostly use high-quality alloy steel wires, which are heat treated to improve fatigue strength. To prevent spring rust, the spring surface is galvanized and phosphatized. The two ends of the spring must be ground smooth and perpendicular to the spring shaft to avoid deflection of the spring during operation.

When the working frequency of the valve spring is equal to its natural frequency or an integer multiple, the valve spring will generate resonance, increasing the probability of fracture. To avoid resonance, variable pitch springs can be used. Currently, most engines use dual spring coaxial mounting. The rotation direction of the inner and outer springs is opposite, and the stiffness of the outer spring is greater than that of the inner spring. Double springs not only prevent resonance, but also shorten the length of the spring. When one spring breaks, the other spring can continue to work, preventing the valve from falling into the cylinder.