1. Classification by the Position of the Cylinder's Central Axis
- Vertical Compressors: The central axis of the cylinder is perpendicular to the ground. This layout usually occupies less floor space and is ideal for installation in space-constrained environments.
- Horizontal Compressors: The central axis of the cylinder is parallel to the ground, with cylinders arranged on only one side of the body. This design facilitates maintenance and servicing.
- Opposed Compressors: The central axis of the cylinder is parallel to the ground, with cylinders arranged on both sides of the body. This layout helps to reduce vibration and enhance the balance of the machine operation.
- Angular Compressors: The central axis of the cylinder is at a certain angle, categorized as L-shaped, V-shaped, W-shaped, and S-shaped depending on the arrangement of the cylinders. These designs are typically used for applications requiring large compression capacity and efficiency.
2. Classification by the Number of Stages Required to Reach Final Pressure
- Single-Stage Compressors: The gas is compressed once to achieve the required final pressure. Suitable for applications where high pressure is not required.
- Two-Stage Compressors: The gas is compressed twice to reach the final pressure. This design improves compression efficiency and energy savings.
- Multi-Stage Compressors: The gas is compressed three or more times to reach the final pressure. Suitable for industrial applications requiring very high pressures.
3. Classification by the Type of Gas Cycle Achieved in the Cylinder
- Single-Acting Compressors: The compression cycle occurs only at one end of the cylinder. This type is simple and less costly.
- Double-Acting Compressors: Compression cycles occur at both ends of the cylinder. This increases the output of gas per cycle, enhancing efficiency.
- Differential Compressors: One or both ends of the cylinder undergo two or more stages of compression cycles, further improving compression efficiency.
4. Classification by the Number of Rows in the Compressor
- Single-Row Compressors: All cylinders are arranged along the same central axis of the body.
- Double-Row Compressors: Cylinders are arranged along two central axes on one or both sides of the body, which aids in enhancing the balance of the compressor.
- Multi-Row Compressors: Cylinders are arranged along more than two central axes on one or both sides of the body, suitable for large industrial applications.
This classification helps better understand the construction and application of piston air compressors, facilitating the selection of suitable compressor models for different needs. These classifications are not only crucial for choosing equipment but also affect subsequent operations, maintenance, and efficiency optimization.