Oil-free lubrication air compressor is not all screw type, there are many types of oil-free lubrication air compressor on the market, each type has its own unique working principle, application scenarios and advantages and disadvantages. The following is a detailed answer:
types of 1. oil-free air compressors
- oil-free piston air compressor
- working principle: Use resin material or heat resistant piston for lubrication, instead of traditional lubricating oil.
- Features: Low cost, simple structure, but high noise, frequent maintenance, suitable for micro and small enterprises or low-demand scenes.
- Application: Private dental clinics, scientific research units, etc.
- Scroll-type oil-free machine
- working principle: The dynamic vortex rotates around the center of the static vortex to form a gas compression cavity.
- Features: The mute effect is good, the price is cheap, but the exhaust volume is small, the energy consumption is large, and the host life is short.
- Application: Hospital, printing, spraying industry.
- Centrifugal oil-free machine
- working principle: The high-speed single impeller does work on the gas and increases the gas pressure.
- Features: Large flow and high power, but complicated operation, high noise and high maintenance cost.
- Application: Biological fermentation, chemical, petroleum, natural gas, refrigeration industry.
- Dry-type oil-free machine
- working principle: Double impeller high-speed rotating compressed gas.
- Features: Stable technology, high market share, but high procurement and maintenance costs.
- Application: Pharmaceutical, food, chemical, electronic fields.
- water-lubricated oil-free machine
- working principle pure water is used as the compressed medium, and the screw and star wheel plate rotate the compressed air.
- Features: High cost performance, low operating costs, but low market awareness.
- Application: Pharmaceutical, food, chemical, electronic fields.
- Oil-free screw air compressor
- working principle: Twin-screw rotary motion completes the air compression cycle.
- Features high efficiency and energy saving, easy maintenance, provide high cleanliness of compressed air.
- Application: Food, pharmaceutical, electronics, semiconductor and other high-standard industries.
Core Technology of 2. Screw Oil-free Air Compressor
- lubrication method
- with special materials and precision machining, efficient lubrication (such as water lubrication or ceramic bearings) can be achieved without lubricating oil.
- Sealing performance
- prevent compressed air leakage through labyrinth seal, mechanical seal or dry gas seal technology.
- energy saving design
- variable frequency speed control technology automatically adjusts the motor speed and reduces energy consumption (energy saving is about 20%-30%).
- Environmental advantages
- oil-free design to avoid oil pollution, in line with environmental regulations, suitable for strict clean requirements of the scene.
3. why screw type oil free air compressor is more common?
- Comprehensive performance advantage:
- compared with the piston or scroll type, the screw type is better in stability, displacement and noise control.
- Industry Adaptability:
- it is suitable for industries with strict air quality requirements (such as medicine, electronics), and can run for a long time with high load.
- Technology Maturity:
- screw oil-free air compressor technology is mature, the market recognition is high, brand and model selection is rich.
4. other applicable scenarios of oil-free air compressor
- water-lubricated oil-free machine: Suitable for users with limited budget and high cost performance.
- Centrifugal oil-free machine: Suitable for large flow and low pressure requirements (such as gas supply to fermentation plants).
- Scroll-type oil-free machine: Suitable for scenes with small displacement and high mute requirements (such as laboratories).
5. selection recommendations
- select type according to requirements:
- high cleanliness requirements choose screw type or dry type.
- Low budget choice of piston or scroll type.
- Large flow selected centrifugal type.
- Focus on core parameters:
- exhaust volume, pressure, noise, maintenance costs.
- Brand and after-sales:
- priority should be given to qualified and well-known brands to ensure equipment stability and after-sales service.
By understanding the characteristics of different types of oil-free air compressors, users can choose the most suitable equipment according to actual needs to avoid blindly following the trend or over-investment.
