Valve oil seal The valve oil seal is a kind of oil seal, which is generally made by the joint vulcanization of the outer frame and fluorine rubber. The diameter of the oil seal is equipped with a self-tightening spring or steel wire for sealing the engine valve guide rod. The valve oil seal can prevent oil from entering the intake and exhaust pipes, avoid oil loss, prevent the mixture of gasoline and air and exhaust gas from leaking, and prevent engine oil from entering the combustion chamber. The valve oil seal is one of the important parts of the engine valve group. It is in contact with gasoline and engine oil at high temperatures. Therefore, it is necessary to use materials with excellent heat resistance and oil resistance, generally made of fluorine rubber.

If your car is weak in acceleration or the car emits blue smoke, then your valve oil seal is aging. So what are the causes of this series of problems?

The first is the installation problem of the valve oil seal: for example, it is mixed during installation, or foreign matter and dust in the pipeline enter the seal to cause leakage; poor assembly causes damage to the seal and causes leakage; the wrong installation direction of the seal causes leakage or because of uneven coating processing. The paint entered the sealing layer.

The second is the selection of the seal: due to high pressure caused by gap bite, and then mixed with air, adiabatic compression caused by seal burning; High-frequency reciprocating motion leads to heating and dry grinding of seals; Environmental dust causes abnormal wear of sealing rings; Problems such as leakage caused by rusting of sealing grooves.

Once again, the design of the sealing equipment, including:

1. Improper selection of guide support material may damage cylinder and piston rod

2. The friction pair gap is not suitable, resulting in gap extrusion bite

3. Improper thread lead angle at the end of the cylinder cylinder piston, damaging the sealing ring

4. Improper installation of sealing lead angle and damage of sealing ring

5. The roughness of the sliding surface is not suitable, and the sealing ring is worn.

6. Uneven plating, opening on the surface where the seal passes, scratching and wearing the sealing ring

7. The seal groove, especially the shaft seal groove, is not rough enough, and the seal is worn and damaged.