A compressor of the ice-car refrigerating plant is characterized by uninterrupted operation that is necessary to maintain a refrigerating cycle in the car. A problem of operating lifetime, unfailing operation and reliability of the compressor depends on functional operation of its basic executive mechanism — crank mechanism. An original dynamic model of the executive crank mechanism is elaborated by the authors. Research of dynamical parameters of the executive crank mechanism according to real dynamic model is carried out. Phenomenon of variable eccentricity caused by the wear of hinges and conditions of its existence are established. Expressions corresponding to dynamical analysis are obtained. Use of the elaborated dynamic model in modern ice-car refrigerating plants ensures a significant economic effect — it decreases: planned repair expenses of refrigerating plants and compressors, ice-car downtime. At the same time it increases the length of the repair period and improves operating characteristics.

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