Gas transmission pump is a continuous suction and discharge of gas to achieve the purpose of pumping vacuum pump, there are basically two types of pumps:
1, the capacity of the vacuum pump Variable capacity vacuum pump is the use of cyclical changes in the volume of the pump to complete the process of inhalation and exhaust of a vacuum pump. The gas is compressed before being discharged. This pump is divided into reciprocating and rotary two:
â‘´ reciprocating vacuum pump: the use of reciprocating piston pump cavity, the gas inhalation, compression and discharge. Therefore, also known as piston vacuum pump.
⑵ rotary vacuum pump: the use of the pump cavity to do rotary motion piston, the gas inhalation, compression and discharge. Rotary vacuum pump has the following types:
â‘ oil seal vacuum pump: It is the use of oil seals the gap between the moving parts to reduce the harmful space of a rotating varactor vacuum pump. This pump is usually equipped with gas ballast, it is also known as gas-town vacuum pump. According to its structural characteristics are divided into the following five types.
a) Rotary vane vacuum pump: The rotor is installed in the pump casing with a certain eccentricity and is close to the fixed surface of the inner surface of the pump casing. Two (or more than two) rotary vanes are provided in the rotor groove. When the rotor rotates Slides reciprocate along their radial grooves and are always in contact with the inner wall of the pump housing. This vane rotates with the rotor to divide the pump chamber into several variable volumes.
b) Spool vacuum pump: a spool is mounted on the outside of the eccentric rotor, the rotor rotates to bring the spool to slide and roll along the inner wall of the pump housing, the spool rod on the upper part of the spool can slide in the swingable spool guide and the The pump chamber is divided into two variable volumes.
c) Fixed-disc vacuum pump: An eccentric rotor near the inner surface of the pump is installed in the pump housing. A radial vane always contacts with the rotor surface is provided on the pump housing. When the rotor rotates, the vane can slide up and down Divide the pump chamber into two variable volumes.
d) trochoidal vacuum pump: eccentric in the pump chamber is equipped with a trochoid trochanter rotor, which along the inner wall of the pump chamber rotation and the pump chamber is divided into two variable volume.
e) Multi-Chamber Rotary Vane Vacuum Pump: A rotary vane vacuum pump with multiple independent chambers driven by the same motor in parallel in a pump housing.
â‘¡ Dry vacuum pump: It is a non-oil (or liquid) sealed varactor vacuum pump.
â‘¢ liquid ring vacuum pump: rotor with a multi-blade eccentrically mounted in the pump housing, when it is rotating, the liquid (usually water or oil) thrown into the pump housing to form a concentric liquid ring, the liquid ring with the rotor blades Formed a few small volume changes in volume, it is also known as rotary varactor vacuum pump.
â‘£ Roots vacuum pump: Pump equipped with two opposite directions synchronous rotation of the double-leaf or multi-lobed rotor, between the rotor, the rotor and the pump housing to maintain a certain gap between the inner wall. It belongs to the rotating vacuum pump. Mechanical booster pump is the type of vacuum pump.
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