In modern industrial production, compressed air serves as a critical power source, and the stability and energy efficiency of its equipment directly impact a company’s production performance. As a major manufacturing and industrial hub, Shanghai exhibits substantial demand for compressed‑air equipment, coupled with stringent requirements. Among these, oil‑injection screw compressors, owing to their distinctive design and superior performance, have secured a significant market share.
The core working principle of oil-injection air compressors
During operation, oil-injected screw compressors inject a substantial amount of lubricating oil into the compression chamber. This oil performs multiple functions throughout the compression process. First, it absorbs the significant heat generated during gas compression, providing efficient internal cooling. Second, the oil film creates a seal between the rotors, minimizing gas leakage and enhancing volumetric efficiency. At the same time, the lubricant effectively reduces mechanical friction and noise during rotor meshing.
Notable Features and Advantages of Oil-Injection Air Compressors
- Good cooling performance:Because the lubricating oil directly participates in the compression process, it rapidly dissipates the compression heat, enabling a higher single-stage compression ratio and effectively controlling the discharge temperature.
- Smooth and reliable operation:The presence of an oil film not only provides a sealing function but also reduces direct contact between metal components, thereby minimizing wear and extending the service life of the equipment.
- Low noise level:Compared with oil-free screw compressors, oil-injected compressors significantly reduce both mechanical and aerodynamic noise during operation, thereby improving the working environment.
- Moderate initial investment and maintenance costs:The structural design is relatively mature, with a high degree of parts commonality, and the costs of subsequent maintenance and repair remain within a manageable range.
Selection Recommendations for the Shanghai Air Compressor Market
When selecting an air compressor in the Shanghai area, companies must comprehensively consider their actual air‑demand requirements. The key to proper selection lies in achieving an optimal match.DisplacementandExhaust pressureIt is recommended to determine the air compressor’s capacity by summing the total air consumption of all pneumatic equipment in the workshop and adding an appropriate margin. In addition, the requirements of the air‑use environment must be taken into account; if there are stringent limits on the oil content of the compressed air, a high‑efficiency oil‑removal filter should be installed downstream.
Key Points for Daily Operation and Maintenance
To ensure the long-term, efficient operation of oil-injection air compressors, proper daily maintenance is essential.
- Regularly check the oil level and oil condition:Ensure the lubricant level remains within the normal range; if the oil becomes emulsified or degraded, replace it promptly.
- Replace consumables on schedule:Replace the oil filter, air filter, and oil–gas separator element strictly according to the prescribed operating hours to ensure smooth system operation.
- Monitor operating parameters:During routine inspections, monitor the exhaust temperature, exhaust pressure, and motor current; if any abnormalities are detected, shut down the equipment immediately and perform troubleshooting.