Pumping Systems: Difference between revisions

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The three types of pump systems: positive displacement, momentum transfer, and entrapment.
Three types of pump systems: '''positive displacement''', '''momentum transfer''', and '''entrapment'''.


Positive displacement: Uses a mechanism to repeatedly expand a cavity, allow gases to flow in from the chamber, seal off the cavity, and exhaust it to the atmosphere. Ex: rotary and screw pumps
== Positive Displacement Pumps ==
Positive displacement: Uses a mechanism to repeatedly expand a cavity, allow gases to flow in from the chamber, seal off the cavity, and exhaust it to the atmosphere.


Rotary: [[File:rotarypump.jpg]]
[[File:Rotary_vane_pump.png| 600px]]


Screw: [[File:screwpump.jpg| 500px]]


Momentum transfer: Uses high speed jets of dense fluid or high speed rotating blades to knock gas molecules out of the chamber. Ex: Diffusion and turbo molecular
Momentum transfer: Uses high speed jets of dense fluid or high speed rotating blades to knock gas molecules out of the chamber. Ex: Diffusion and turbo molecular


Diffusion: [[File:diffusionpump.png]]
[[File:Cut_through_turbomolecular_pump.jpg|300px]]


Turbo molecular: [[File:Cut_through_turbomolecular_pump.jpg|300px]]
capture gases in a solid or adsorbed state. Ex: Ion and sorption pumps


Entrapment: capture gases in a solid or adsorbed state. Ex: Ion and sorption pumps
[[File:ionpump.jpg]]
 
Ion: [[File:ionpump.jpg]]

Revision as of 20:23, 7 November 2014

Three types of pump systems: positive displacement, momentum transfer, and entrapment.

Positive Displacement Pumps

Positive displacement: Uses a mechanism to repeatedly expand a cavity, allow gases to flow in from the chamber, seal off the cavity, and exhaust it to the atmosphere.


Momentum transfer: Uses high speed jets of dense fluid or high speed rotating blades to knock gas molecules out of the chamber. Ex: Diffusion and turbo molecular

File:Cut through turbomolecular pump.jpg

capture gases in a solid or adsorbed state. Ex: Ion and sorption pumps