Marine diesel engine accessories What are the common structures of marine sprocket

1. Overall structure

It is generally used for the processing of single, double row, single and double flange sprockets with standard chain P=38.1 or below.

2. Welded structure

It is mainly used in the processing of medium and large size single and double flange sprockets. During processing, the flange part is convex by bar turning. The outer diameter and shaft hole of the gear ring can be processed after the plate is cut. One end of the hole is turned out of the welding groove and sleeved into the flange for welding. During welding, both ends shall be welded, and low hydrogen electrode such as T506 electrode shall be used.

3. Cast sprocket

It is mainly used in the processing of large chain wheels. When processing, only the ring gear, the two end faces of the flange, the outer diameter, the inner diameter and the keyway are processed, and then the tooth profile is processed. The ring sprockets are all cast. There are generally two kinds of materials for casting sprockets: cast iron and cast steel, such as HTl5O, HT2O0 and ZG310-570 (ZG45).

4. Forged sprocket

It is mainly used in the production of medium and large size chain wheels with large force. When forging, whether it is single flange type or double flange type, it is generally forged into a convex shape, with sufficient machining allowance reserved for the shaft hole, low material utilization rate and high cost.