Plunger part of diesel engine

The utility model discloses a plunger part of a diesel engine, which comprises a main body assembly, a plunger piston and a plunger piston, the protection assembly comprises a fixing frame arranged on the outer surface of the plunger sleeve, a connecting frame connected to the exterior of the fixing frame, a fixing plate arranged on the inner surface of the top end of the connecting frame, cooling fins connected to the outer surface of the connecting frame, a fixing column arranged on the lower surface of the fixing plate and a fixing ball connected to the outer surface of the bottom end of the fixing column. Wherein the diameter of the fixing ball is larger than that of the fixing column, springs are arranged on the inner surface of the fixing frame, and the number of the springs is multiple. And the noise reduction assemblies are arranged in one group and are connected to the bottom end of the plunger sleeve. According to the utility model, the protective assembly is arranged, so that the problem that the s