Features and Working Principle of Oil-Free Vacuum Pump
The oil-free piston type vacuum pump is a piston type vacuum pump.
This pump is not suitable for the removal of gases that are corrosive to ferrous metals, chemically reactive to pump oil, gases containing particulate dust, and toxic gases that are too high in oxygen and explosive. It cannot be used as a transfer pump (ie, pumping from one container to another).
Advantages and disadvantages
The oil-free vacuum pump is a mechanical vacuum pump that can operate without any oil lubrication. The utility model has the advantages of simple structure, easy operation, convenient maintenance and no pollution to the environment. The oil-free vacuum pump has good durability and is a vacuum, compression, dual-purpose vacuum pump. It is a basic equipment with a wide range of applications to obtain vacuum.
Compared with the oil pump, the oil-free vacuum pump has a low vacuum and a small pumping capacity, but is compact in size, easy to install, simple to maintain, easy to move, does not produce soot, and does not pollute the environment, especially in laboratories with higher requirements. It is also one of the most frequently equipped equipment in the laboratory.
Therefore, when purchasing an oil-free vacuum pump, first determine the degree of vacuum required to work. If the demand is high, the vacuum pump selected should be higher than the required vacuum. Otherwise, the vacuum requirement will not be met. Go to work requirements. The second is the pumping rate of the oil-free vacuum pump, which is slightly larger than the required pumping rate during the selection, so that it can better meet the needs. Finally, see if the extracted gas is corrosive, corrosive gas will corrode the pump, and special materials must be used to meet the demand.
Its working principle is the same as that of the general volumetric pump. It consists of main parts such as stator, rotor, rotary vane, cylinder and motor. The rotor with the rotary vane is eccentrically mounted in the fixed cylinder. When the rotor rotates at high speed, the four radial sliding vanes in the rotor slot divide the pump chamber into four working chambers. Due to the centrifugal force, the rotary vane is closely attached. The cylinder wall separates the stator inlet and outlet ports, and starts to operate again and again to change the volume. The inhaled gas is discharged from the exhaust port to achieve the purpose of pumping.