¿Qué es un compresor de aire exento de aceite?

Jun 4, 2025

1.What is an oil-free air compressor?

En compresor de aire exento de aceite is a type of compressed air equipment that does not use lubricating oil during the compression process, or employs technical measures to prevent oil from entering the compression chamber, with the goal of delivering pure, oil-free, and clean compressed air.

Compared with traditional oil-lubricated compressors, oil-free compressors achieve oil-free operation through material substitution, structural optimization, and process improvements, making them ideal for applications that demand a high level of air purity.

Oil-free compressors use high-performance, wear-resistant self-lubricating materials such as PTFE (Teflon) and carbon graphite for piston rings, bushings, and sealing components.

In oil-free screw compressors, the two rotors do not make contact; instead, they are driven by precisely synchronized gears, eliminating the need for oil-based lubrication and preventing metal-to-metal wear.

All moving parts are lubricated outside the compression chamber. Oil seals or air seals are typically used to isolate these parts, ensuring that no oil enters the air path.

2.What are the product advantages of oil-free scroll compressors?

（1）High Reliability:

Core components are highly precise, rotary bearings have strict requirements, and the overall number of parts is relatively low.

（2）Compact Size:

Small rotational radius, high rotational speed, and compact structure design.

（3）Lightweight Design:

Moving disk, stationary disk, and frame are made of aluminum alloy, ensuring a lighter overall unit.

（4）Low Operating Cost:

Few wear parts, no cooling oil, no oil-air separation system, resulting in lower maintenance costs.

（5）High Efficiency:

Continuous compression with minimal leakage; the displacement difference between low and high pressure stages is negligible.

（6）Ease of Use:

Long maintenance intervals, easy servicing, and no need for warm-up in winter.

（7）Third-Party Certification:

Industrial units certified for EMC; onboard units certified for IP67 and EMC.

（8）Import Replacement:

Widely used as a domestic alternative to imported models.

3.What is the working principle of oil-free air compressor?

（1）Air Intake

Ambient air enters the compressor through the intake port, typically equipped with a high-efficiency air filter to remove large particles and dust.

（2）Oil-Free Compression

The air enters the compression chamber (such as a screw chamber, scroll chamber, or piston chamber

Oil-free lubrication design ensures that no oil comes into contact with the compressed air:

Screw air compressors: High-precision synchronous gears drive the rotors, ensuring non-contact rotation.

Piston compressors: Use self-lubricating materials such as PTFE (Teflon) or carbon graphite for piston rings and bushings.

Scroll compressors: The orbiting and fixed scrolls operate without oil contact, compressing air via a scroll motion.

（3）Discharge Treatment

The compressed air is cooled by a cooler, then passed through a drying system (such as a refrigerated dryer or desiccant dryer) and a filtration system (including fine filters, oil-removal filters, and water separators).

（4）Output

The final output is clean, dry, oil-free compressed air of high quality.

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