I. Overview
Oil-injected screw air compressors are highly efficient and reliable compressors widely used in various applications, such as nitrogen and oxygen production, and air production. They utilize a twin-screw compressor head that controls exhaust pressure by adjusting rotational speed. They offer advantages such as stable pressure, low noise, and low maintenance costs.
II. Compression Process
The compression process in an oil-injected screw air compressor is accomplished by two intermeshing screws. These screws rotate in opposite directions, drawing air from the inlet into the compression chamber and gradually increasing its pressure at the outlet. During this process, the air in the compression chamber generates heat, requiring cooling to prevent overheating.
III. Cooling Process
To prevent overheating, oil-injected screw air compressors utilize a cooling system. Within the compression chamber, heat is transferred to the outside via a radiator or coolant. This ensures that the compressed air temperature does not exceed a specified range, thereby ensuring efficiency and safety.
IV. Lubrication Process
Lubricating oil is essential for the operation of oil-injected screw air compressors. It reduces friction in the compressor head and also cools and seals the air. Lubricating oil must be sprayed into the compression chamber in a specific ratio to ensure effective lubrication.
V. Control System
The control system of an oil-injected screw air compressor is crucial. It adjusts the screw's rotational speed to control exhaust pressure to meet varying requirements. It also features temperature, pressure, and current monitoring functions, enabling real-time monitoring and adjustment of the compressor's operating status.
VI. Conclusion
The oil-injected screw air compressor is an efficient, stable, and durable compressor. Its versatile features make it suitable for a wide range of industrial applications. Understanding its operating principles will help you better operate and maintain oil-injected screw air compressors, improve efficiency, and save costs.
