The commonly used mechanical pump in laboratory is rotary vane vacuum pump, also known as rotary vane pump. It is composed of a stator and an eccentric rotor, mainly composed of stator, vane and rotor.
The rotor is eccentrically installed in the stator cylinder, and two blades are tightly embedded in the rotor slot. Under the spring force, it is close to the stator cylinder wall, and the air inlet and exhaust port on the stator are separated into two parts. When the rotor rotates, the space of the air inlet will be gradually expanded to absorb gas, while the space of the exhaust part will be gradually reduced, and the inhaled gas will be compressed and discharged from the exhaust port, so as to achieve the purpose of vacuumizing. The vacuum pump oil is used as sealing fluid and lubricant in the vacuum pump oil with very small saturated vapor pressure.
2xz-2 rotary vane vacuum pump is commonly used in laboratory, "2XZ" refers to double-stage direct coupled pump, "X" refers to rotary vane vacuum pump, and data after "2XZ" represents pumping rate (L / s). The two-stage pump is composed of two chambers in series. Obviously, the limit vacuum of the two-stage direct coupled pump is better than that of the single-stage pump, which can reach a vacuum degree of about 10-1pa.
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