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4. Operating principle
The pump’s operating principle is shown as Diagram 3.When the pump is rotating, the gas in an
exhausted container directly enters the space encircled by two rotor and pump cavity and the gas
entered before is merely encircled by space Vo(see the shaded parts in Diagram). The mixed gas in
Vo is merely encircled, but not be compressed and expanded. With the rotation of a rotor, the
rotor’s top reaches the outlet port edge, the gas in pump’s outlet port will spread to the space Vo,
the mixed gas in Vo will be carried to a pump to be exhausted. Thus, with the rotor’s continuous
operation, more gas will be carried to outlet port and exhausted by the pump. That is the
functional principle of the pump’s volume.
When this pump is operating under a very low pressure, because of rotor’s high speed (3000rpm),
the linear speed of the rotor’ surface is near to molecular heat pace. At this time, the gas impacted
on the rotor is brought to an outlet port with a higher pressure and removed by beforehand
vacuum pump. That is the molecular functional principle of thin pump.
The combined action by the two principles makes this pump have features of a big pumping rate
and a stable pumping rate curve in an interval of 1.3x103～1.3 Pa.
According to this pump’s characteristics and different operating condition, different fore pump can
be freely chosen which is not required too high vacuum, but required to remove corrosive gas with
large steam or little dust. Completed with a double-stage water-ring vacuum pump and a piston
vacuum pump, the limit vacuum is lower and its power proportioning is different, too. Our
company can specially design various pump’s unit according to user’s different requirements and
operating conditions .Welcome to contact us by call or email.
Diagram 3
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