Requirements and types of cylinder heads for marine diesel engine accessories

DK28 diesel engine accessories Claim

(1) Sufficient strength and rigidity.

(2) The metal accumulation and high temperature parts between the various valve holes at the bottom should be cooled well to make the temperature of each part uniform.

(3) It is convenient to disassemble and maintain various valves.

(4) The scale of the cooling water cavity is easy to remove.

L28/32 diesel engine accessories Types of:

(1) According to the material: ① cast iron ② cast steel ③ forged steel The low-speed machines with higher pressure increase are mostly made of forged steel.

(2) According to the quantitative relationship between the cylinder head and the cylinder, it can be divided into:

①Single type: each cylinder is equipped with a cylinder head, which is used in medium and large-scale high-supercharged diesel engines. The characteristic is that the sealing surface at the joint surface of the cylinder head and the cylinder sleeve is good, and the disassembly and assembly are convenient, but the center distance of the cylinder is increased and the length of the diesel engine is increased.

② Integral type: The cylinder heads of all cylinders of the entire diesel engine are cast into one, which is mostly used for small diesel engines. The characteristic is that the center distance of the cylinder is small, the structure is compact, but it is easy to deform, the sealing is poor, the structure is complicated, and the processing is inconvenient.

③ Grouping type: The cylinder heads of 2-3 cylinders are combined and cast into one, which is used in small and medium-sized high-speed machines with large cylinder diameters.