Oil-free vacuum pump selection requirement and principle -

oil-free vacuum pump is a kind of no oil lubrication of mechanical vacuum pump can work. It has simple structure, convenient operation, convenient maintenance and does not pollute the environment. Good durability of oil-free vacuum pump, it is a kind of pumping air into vacuum state, compression and vacuum pump, is the base of the vacuum equipment, application range is very wide.

oil-free vacuum pump is the same as the normal displacement pump, the stator, rotor, rotor, cylinder, electrical and other major parts. With a rotating blade rotor mounted eccentrically in the fixed cylinder. When the rotor high-speed rotation, the four radial sliding rotating blades in the rotor slot pump chamber is divided into four studio. Due to the effect of centrifugal force, the rotor blades firmly adhere to the cylinder wall, will be separated from the entry and exit of the stator. Stator loop work, change the volume, discharge from the vent gas suction, so as to achieve the aim of extraction.

one of oil-free vacuum pump working principle is when large suction air, when the small size ( Pressure) When the discharge air. Volume change is implemented by moving mechanical parts, require small clearance and high precision, such as claw type vacuum pump.

the other is to rely on very high mechanical speed, through the directional impact the air molecules, such as molecular pump. The third kind, cryogenic pump, almost all the air molecules was frozen and trapped near freezing cold surface.

oil-free vacuum pump selection

compared with oil pump, oil-free vacuum pump vacuum degree is low, pumpability is small, but small size, easy installation, simple maintenance, easy to move, don't smoke, don't pollute the environment, especially suitable for demanding laboratory use. It is also one of the most conventional equipment in laboratory.

so, when buying oil-free vacuum water pump, must first determine the vacuum degree required. If demand is high, the selected the vacuum degree of vacuum pump should be higher than the requirement. Otherwise do not conform to the requirements of the process of pumping air into vacuum state, also do not conform to the requirements of the job. Second, when choosing model, oil-free vacuum pump pumping rate should be slightly higher than the requirements of the pumping rate, in order to better meet the needs. Finally, see if there are corrosive oil-free vacuum pump pumping gas. Corrosive gas corrosion pump. Must use special materials to meet the demand.

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