Screw Compressor Technology and Structural Characteristics

A screw compressor typically consists of two parts: the screw and the barrel. These two parts fit together precisely to form a continuous conveying channel. The screw is divided into feeding, compression, and metering sections. The screw pitch, screw depth, and surface treatment processes (such as chrome plating and nitriding) for each section are optimized based on material characteristics (such as melting point, viscosity, and thermal stability). The barrel adopts a segmented structure, with heating/cooling devices installed in each section. Gradual plasticization of the material is achieved through temperature zone control. For example, the feeding section needs to maintain a lower temperature to prevent material agglomeration, while the metering section requires a high temperature to ensure melt uniformity. Furthermore, the smoothness (typically requiring Ra ≤ 0.8 μm) and wear resistance (e.g., using bimetallic bushings) of the barrel's inner wall directly affect the screw's service life.