Pulley Parts: Shell
The chemical composition and mechanical properties of the metal materials used in the drum body should meet the corresponding national standards.
Before welding, the steel should be shot peened by pretreatment process.
Pulley Parts: Hub
The casting quality of pulley hub shall be tested by magnetic powder or ultrasonic wave . For circumferent ial welds and longitudinal welds of small diameter rollers, the special technology of single side welding and double side forming should be adopted. The circular and longitudinal welds of the drum are all carbon dioxide shielded welds, and nondestructive inspection should be carried out to ensure the quality of the welds. Eliminate welding stress and ensure the normal operation of pulley.
Pulley Parts: Shaft
The drum shaft shall be forgings and shall be nondestructive tested and shall be provided with a test report. The allowable torque and allowable net force should meet the design requirements.
Under the maximum load condition of the drum shaft, the deflection of the shaft between the bearing blocks is the connection way between drum and shaft.
According to the need, it uses key, heat expansion or extension sleeve (power block) connection.
