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ABSTRACT
The Labor Safety and Health Law defined Cranes as a dangerous machine; their owners should make periodical inspections to ensure the machine to be safe in the process of operation. These analyses point mainly to the measurement of the number of broken wires in wire rope, the defection of the trusses, and the opening of the hook, for the reliability of the safety operation in the qualified wear ranges.
The contain of the research includes the material strength, the wear of operating; the alternating stresses fatigue fracture, the systematic safety analysis and the risk assessment. The analyses exploit the physical property of material and the experimental statistical data in mechanical handbook to predict and analyze. Under the reasonable operating conditions, the reliability of safety operation could be analyzed, and proved by the check data of cranes’ owner kept for years.
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