Does any member have information on oil-free screw air compressors? Please share it so I can take a look
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There are conditions to be met, such as pressure and flow rate; screw compressors also come in large and small sizes. The most common type are compressors used as sources of instrument air; you can find many of them by simply doing a search.
An oil-free compressor uses water instead
We use it in dense-phase pneumatic conveying, with air compressors as the power source
Is water sprayed on the screw? I don’t quite understand
It doesn’t matter what you use it for; what’s important are the conditions. For example, what level of delivery pressure and flow rate is required. The moisture content in the air (dew point), and whether it is necessary to add drying equipment. Only with these conditions can suitable equipment be selected based on them. Screw pumps belong to positive-displacement conveying equipment; they are similar to those screw compressors that can adjust pressure and flow rates as needed, and that separate oil after it has been mixed. It is recommended to search for “screw compressor schematic diagram” – you’ll find everything there.
Oil-free machines still have lubricating oil; it’s just that the oil does not come into contact with the compressed air, which is why they are called oil-free machines. Bearings and gearboxes also require lubricating oil
Screw compressors are now everywhere; what’s there to be interesting about them? If you want to buy it, just purchase it directly from the manufacturer; I recommend machines made by Berg in Germany.
Oil-free machines rely on the precise fit of the rotor to control the gap and achieve sealing. It’s not based on water; any machine that claims to rely on water must be a fake. When the screws mesh with each other, the temperature is high, and the water has long since vaporized – so what’s the point of sealing anything?
It mainly relies on the internal coating to achieve a tight fit and control the gap
Oil-free machines generally operate 24 hours a day, 365 days a year, and require extremely high levels of reliability. Is there any coating that can function properly under such high temperatures and pressures?