Valve seat

The valve seat is an important part in the engine, its function is to connect the valve and the valve seat, so that the valve can work normally. The valve seat ring has high wear resistance and high temperature resistance, can withstand high pressure impact and friction, ensures the sealing of the valve, and improves the efficiency and performance of the engine.

The valve seat ring is generally made of metal and rubber composite materials, the metal material is usually cast iron or steel, and the rubber material is silicone rubber or nitrile rubber. This combined material can maintain stable performance under high temperature and high pressure environment, and has good wear resistance and sealing performance.

The installation position of the valve seat ring is on the engine valve seat, and its main function has two aspects. First of all, the valve seat ring can provide the sealing between the valve and the valve seat, prevent the leakage of compressed gas and explosive gas in the cylinder, and ensure the normal operation of the engine. Secondly, the valve seat ring can also reduce the friction and wear between the valve and the valve seat, prolonging the service life of the valve.

The valve seat is subjected to high pressure and friction during the operation of the engine, so it needs to have the characteristics of high strength and wear resistance. Generally speaking, the valve seat ring should have the following technical indicators:

The first is temperature resistance. The operating temperature of the engine is high, especially the exhaust temperature of the gasoline engine can reach hundreds of degrees Celsius, so the valve seat ring needs to have good high temperature resistance and be able to maintain stable performance in high temperature environments.

The second is wear resistance. During the up and down movement of the valve, the valve seat ring will be constantly subjected to frictional force, which is prone to wear and tear. Therefore, the valve seat ring needs to have higher wear resistance, be able to withstand greater friction without being easily damaged.

The third is sealing performance. One of the main functions of the valve seat is to provide sealing between the valve and the valve seat to prevent gas leakage in the cylinder. Therefore, the valve seat ring needs to have good sealing performance, which can effectively close the gap between the valve and the valve seat.

In addition to the above technical indicators, the valve seat ring should also have good installation performance and corrosion resistance. Fitting performance includes ring diameter accuracy and shape consistency to ensure that the valve seat ring fits precisely on the valve seat. Corrosion resistance means that the valve seat ring is resistant to chemicals