Screw compressors, officially known as screw air compressors, are a type of positive-displacement compressor. Air compression is achieved through the volume changes created by the intermeshing male and female rotors—arranged parallel to each other—within the compressor housing. As the rotor assembly rotates inside the precision-matched housing, the gas trapped between the rotor teeth undergoes continuous, periodic volume variations, moving axially from the suction side toward the discharge side. This process completes the three essential steps: intake, compression, and exhaust. When it comes to controlling noise from air compressors, the primary approaches involve using silencers, silencing tunnels, and soundproofing techniques: 1. **Equipment Silencers**: The main noise sources typically come from the intake and exhaust ports, so it’s crucial to select appropriate intake and exhaust silencers. Since compressor intake noise tends to have low-frequency characteristics, intake silencers should either be purely resistive or incorporate a combination of resistive and reactive elements for optimal performance. Meanwhile, given the high pressure and velocity of the compressor’s exhaust airflow, small-hole silencers are recommended at the exhaust outlet. 2. **Silencing Tunnels**: These underground or semi-underground tunnels feature walls lined with sound-absorbing bricks. By connecting the compressor’s intake pipe directly to the silencing tunnel, incoming air is routed through the tunnel before entering the compressor unit. This method significantly reduces intake noise while also extending the lifespan of the silencer compared to conventional designs. 3. **Soundproof Enclosures**: Even after installing silencers or silencing tunnels, mechanical and motor noise from the compressor unit may still remain at high levels. To address this, it’s advisable to equip the entire compressor assembly with a soundproof enclosure. 4. **Hanging Acoustic Absorbers**: At the Lingfeng Air Compressor Station in Foshan, the large, open factory space suffers from significant reverberation. Installing suspended acoustic absorbers across the factory ceiling can effectively reduce overall noise levels by 3–10 dB(A) and shorten reverberation time by 5–10 seconds. ### Key Features of Screw Compressors: - **Compact All-in-One Design**: The compressor unit is housed in a fully enclosed box, integrating the screw compressor head, motor, exhaust system, oil injection and oil-gas separation system, cooling system, control system, and electrical components into a single, self-contained unit. This design eliminates the need for specialized foundations, making transportation and installation exceptionally convenient. - **High-Efficiency, Reliable Top-Tier Compressor Head**: Utilizing an advanced third-generation double-screw compressor head from a globally renowned brand, this model features asymmetrical 5:6 tooth profiles, delivering outstanding performance. Its manufacturing precision ensures consistent quality, resulting in superior compression efficiency that outperforms similar products from other brands. - **Advanced PLC-Controlled Operation**: Equipped with a user-friendly Chinese or English LCD display (fully customizable), the compressor provides real-time monitoring of all operational statuses, fault alerts, parameter settings, temperature and pressure readings, total operating hours, and load-specific metrics such as loading/unloading/full-load indicators. It also includes emergency stop functionality and multiple operation modes for flexible control. ### Key Functions of the Screw Compressor: 1. **Overheat Protection**: If the head’s exhaust temperature exceeds 105°C, the system immediately triggers both an alarm and shuts down the compressor to prevent damage. 2. **Electrical Safety Protection**: In case of electrical faults, the system will issue an alarm and halt operations to ensure safe shutdown. 3. **Overload Protection**: Both the main motor and fan motor are equipped with overload protection mechanisms, automatically shutting down if excessive current is detected. 4. **Phase Failure Protection**: The system includes safeguards against incorrect phase sequences or missing phases in the 380V power supply, triggering a shutdown to prevent potential hazards. 5. **Overpressure Protection**: If the exhaust pressure surpasses the preset threshold, the compressor will shut down immediately to avoid overloading the system. 6. **Filter Blockage Alerts**: The unit monitors and alerts users when the air separator, air filter, or oil filter becomes clogged, ensuring timely maintenance. 7. **Automatic Temperature Control**: A thermostatic valve maintains the lubricating oil temperature above the dew point pressure, keeping the oil at its optimal operating condition for maximum efficiency. 8. **Comprehensive Fault Detection System**: The compressor is designed with built-in diagnostic capabilities, promptly notifying users of any malfunctions and guiding them on necessary maintenance tasks. 9. **Self-Diagnostic and Protective Functions**: The unit continuously monitors its own health and safety, automatically activating protective measures in case of anomalies. 10. **PLC-Based Remote Monitoring**: The compressor is fitted with an RS485 serial interface, enabling seamless integration with the customer’s Distributed Control System (DCS). This allows for centralized remote monitoring and control of multiple units simultaneously. 11. **Automatic Fan Control**: The cooling fan operates based on preset temperature thresholds: it starts when the compressor head reaches 90°C and stops when the temperature drops below 78°C. For more information, visit our company website at [www.gzqxjd.com](http://www.gzqxjd.com) or contact us at: - Ms. Wu: +86-18718849558 - Ms. Yin: +86-13728095578 - Mr. Yu: +86-13527819678 Our office is located at: No. 29-3 Hongqi Road, Zhuliao Town, Zhongluotan, Baiyun District, Guangzhou.