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Working principle of spiral freezer

2025-06-11

The spiral quick freezing machine mainly consists of continuous mesh belt, feeding and discharging transfer cage, mesh belt support guide rail, electric motor and reducer, tensioning mechanism, nylon guide wheel and other main parts. The working principle is that the feeding and discharging rotary cage rotates in one direction under the drive of the motor and reducer. The front rotary cage mesh belt support guide rail is angled upwards, and the rear rotary cage mesh belt support guide rail is angled downwards. The mesh belt chain link opening faces backwards, so the mesh belt can only slide on the guide rail in one direction. The internal rotating cage surface (green vertical direction in the figure) has nylon vertical bars evenly distributed. After the driving motor is started, the upper and lower mesh belts of each rotating cage are tightened, causing the mesh belts to shrink inward (radially) and hold the rotating cage tightly. Due to the uniform distribution of nylon vertical bars on the surface of the rotating cage, the rotating cage slides along the support guide rail with the mesh belt under the action of friction, causing the front rotating cage mesh belt to slide upward along the support guide rail and the rear rotating cage mesh belt to slide downward along the support guide rail. The front and rear mesh belts form a cycle under the action of the tightening mechanism. The material enters the spiral upward from the front rotating cage inlet on the mesh belt, and then spirals downward to the outlet after reaching the rear rotating cage. Under the action of the evaporator, the material freezes. It should be noted that the mesh belt and the rotating cage, as well as the mesh belt and the guide rail, are all subject to rolling friction. The friction force of the rotating cage causes the rotating cage to move, and this friction force should not be too large or too small. If it is too large, the relative sliding between the mesh belt and the rotating cage will decrease, and the mesh belt of the front rotating cage will be tighter, making it easier for the upper end to flip over. Being too small can cause the relative sliding between the mesh belt and the rotating cage to increase, resulting in a decrease in the force of the mesh belt holding the rotating cage. During operation, the mesh belt may become stuck, and even accumulate. Some mesh belts may move excessively outward (radially outward along the guide rail) and slide out of the guide rail, causing the mesh belt to jam.

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