Air Compressor Screw


Air compressor screws use two rotors to compress air, known as male and female, respectively.

These rotors feature unique designs to maximize efficiency and performance. An opening valve pulls air in, gets trapped between the rotors, and releases it on the other side through an exit port. Discover the best info about کمپرسور اسکرو.

Efficient Compression

Air compressor screw systems work by converting shaft energy into compressed air through isothermal compression. A pair of matching rotary screws with carefully engineered tolerances compresses this air; their rotors mesh together in an elliptical gap that is larger at the suction side than at the discharge side of the compressor, drawing in ambient air which becomes trapped between their rotating blades and compression area, then heated by their continued spinning, expanding it with heat until its volume decreases significantly as they continue their journey toward and through the discharge port.

At higher pressures, air becomes hotter and loses more entropy (energy). As temperature increases, additional energy must be expended to raise compressed air to its new pressure level – leading to decreased efficiency for compressors at these higher pressures.

Lubricated (or oil-flooded) rotary screw air compressors rely on oil for several functions, including lubricating rotors, cooling air output, and preventing overheating as it is compressed. Excess oil can be collected in an oil separator tank, while any remaining residue can be eliminated using inline filtration technology. For environments in which quality compressed air is paramount, oil-free screw compressors may provide cleaner compressed air output without contamination concerns.

High Flow Rates

Air compressors that utilize screw rotor technology typically provide higher cubic feet per minute (CFM) output per horsepower compared to piston-type and reciprocating air compressors, giving users access to up to four to five times more compressed air (measured in cubic feet per minute, or CFM).

Rotary screw air compressors are tireless workhorses that operate 24/7/52 weeks a year. Their 100% duty cycle offers continuous airflow for industrial applications of any size.

These compressors utilize rotors with helical lobes that mesh together to compress the gas. As they do so, the working area between male and female rotor lobes decreases as screws weave together; this decrease in volume creates pressure. These machines can be equipped with adjustable discharge pressure settings by changing suction/discharge port apertures (known as “slide valves”) that regulate when each flute begins compression and ends compression.

An oil used in a rotary screw compressor helps lubricate its rotors and cool them and is separated from compressed air as it leaves the compressor. Once separated, this oil passes through an internal cooler and system filters to filter out contaminants before returning to use. Furthermore, this type of air compressor requires drain valves in order to drain any liquid water that forms as the air cools off.

Compact Design

Screw compressors require less maintenance than their piston or centrifugal counterparts due to having few moving or contacting parts, reducing operating costs and downtime – an attractive feature for businesses that have limited space or fluctuating air demands throughout the day.

Screw compressors typically operate with lower internal temperatures than other air compressor types, making them more energy-efficient and cutting energy usage significantly. Furthermore, this helps decrease the work needed from coolers and dryers, further cutting operating costs.

A rotary screw compressor can either be oil-flooded or oil-free, depending on its application and environment. An oil-flooded compressor provides higher PSIG as the oil acts as a coolant for its compression cavities; however, this may result in contamination with processed compressed air, making it unsuitable for food-grade or pharmaceutical applications. Oil-free compressors, on the other hand, offer lower PSIG while maintaining clean compressed air for use.

Manufacturers working with plastics, rubber, and similar materials often rely on rotary screw air compressors to power air tools for cutting, punching, clamping, and injection molding operations. Food, beverage, and pharmaceutical applications requiring Class Zero air quality often opt for an oil-free rotary screw compressor to maintain product integrity. No matter the application, sizing your compressor correctly to avoid costly downtime and production delays.

Low Maintenance

The compressor features an air filter to remove moisture or oil residue before discharging it into the atmosphere. Compressed air is separated from oil via centrifugal force and then collected in an oil separator tank, where it will later be filtered and reused again during another cycle.

ELGi’s electric oil-lubricated rotary screw air compressors combine all necessary functional components into a single housing, creating an energy-efficient air compressor with minimal maintenance needs compared to reciprocating compressors. Our industrial rotary compressors are durable and reliable – meeting industry quality standards while being energy efficient enough to reduce operating costs significantly.

Rotary screw air compressors are reliable workhorses, capable of operating nonstop at 100% duty cycle for continuous air usage in applications like milking robots on dairy farms or pharmaceutical facilities.

Substantial demand requires continuous air delivery; they cannot switch on and off quickly enough to prevent overheating or wear and tear. If your compressed air demand varies frequently, consider selecting a compressor with a regulated speed drive motor, which allows it to run at lower speeds for increased efficiency while simultaneously decreasing energy bills.

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