No oil and water lubrication air compressor does not need to be refueled its lubrication and maintenance methods are essentially different from traditional oil-lubricated air compressors. The following is a detailed explanation:
the core principle of 1. oil-free water lubrication air compressor
- lubricating medium
- completely replace the lubricating oil with water (usually industrial water or deionized water), and form a lubricating layer through the water film to reduce the friction between the piston and the cylinder, bearing and other parts.
- Water also plays a cooling role in the compression process, reducing the exhaust temperature and reducing energy consumption.
- Sealing technology
- A specially designed sealing structure (such as mechanical seal, labyrinth seal) is used to prevent water from mixing with compressed air and ensure that the exhaust is oil-free.
- Some models are equipped with a gas-water separator to further remove moisture from the compressed air.
Why don't 2. need gas?
- Lubrication needs are met by water
- water has natural lubricity and can form a thin water film on the metal surface, effectively reducing friction and wear.
- Water has a high specific heat capacity and can quickly absorb the heat generated during compression to avoid overheating of components.
- Avoid the risk of oil contamination
- the traditional oil-lubricated air compressor needs to replace the lubricating oil regularly, and there is a risk of oil pollution of compressed air.
- Oil-free water-lubricated air compressors eliminate oil pollution from the source and are suitable for scenarios with extremely high air quality requirements (such as food, medicine, and electronics).
3. maintenance points
- water quality management
- the water quality shall be checked regularly to prevent scale and impurities from blocking the pipeline or damaging the seal.
- It is recommended to use soft water or deionized water to avoid calcium and magnesium ion deposition.
- Component Replacement
- piston rings, seals and other wearing parts need to be replaced regularly (usually every 5000-8000 hours).
- The replacement cycle depends on the operating environment, water quality and maintenance level.
- Daily inspection
- monitor the exhaust temperature, pressure and water volume to ensure stable operation of the equipment.
- Condensate water shall be drained regularly to prevent water from corroding pipelines.
4. applicable scenarios
- high cleanliness requirements: Food processing, pharmaceutical production, electronics manufacturing and other fields.
- Strict environmental requirements avoid waste oil treatment and reduce the risk of environmental pollution.
- Special gas compression: If compressed air is in direct contact with the product or process medium.
Comparison of 5. and traditional air compressor
| Characteristics | air compressor without oil and water lubrication | traditional oil lubricated air compressor |
|---|
| lubricating medium | water | lubricating oil |
| maintenance content | water change, seal replacement, water quality management | oil change, oil filter and oil core |
| air quality | oil-free, water content adjustable | trace oil content (post-treatment required) |
| environmental protection | no waste oil generation | waste oil to be disposed |
| initial cost | higher | lower |
| operating costs | water fee and low energy consumption | high oil and energy consumption |
6. Summary
oil-free water lubrication air compressor through water lubrication and sealing technology, to achieve a true "oil-free" operation, without adding any lubricating oil. Its maintenance focuses on water quality management and replacement of wearing parts, rather than the traditional sense of "refueling". This model has significant advantages in environmental protection, air quality and special application scenarios, but the initial investment cost is high and needs to be selected according to actual needs.
