Sealing surface structure at oil atomizer nozzle

The invention discloses a sealing surface structure at an oil atomizer nozzle. The sealing surface structure comprises a needle valve, a needle valve body, an oil inlet, a pressure chamber, a pressure-bearing conical surface, a fixed sealing surface, a movable sealing surface and a shaft needle. A long needle valve serves as the needle valve. The needle valve is matched with the needle valve body. The oil inlet is formed in the needle valve body. The pressure chamber is a clearance space formed by the needle valve and the needle valve body. The pressure-bearing conical surface is arranged on the needle valve. The movable sealing surface is further arranged at the lower end of the needle valve and located under the pressure-bearing conical surface. The fixed sealing surface is arranged on the needle valve body. The fixed sealing surface corresponds to the movable sealing surface in position. The shaft needle is further arranged at the lower end of the needle valve. The movable sealing surface is of a convex ci