Working principle of Roots vacuum pump and its application in industry

  Working principle of Roots vacuum pump and its application in Industry , Roots vacuum pump (hereinafter referred to as roots pump) is a variable volume vacuum pump with two blade rotors rotating synchronously in opposite directions
There is a small gap between the rotors of the vacuum pump and between the rotor and the inner wall of the pump shell Roots vacuum pump has been tested by long-term operation in petroleum, chemical industry, plastics, pesticides, steam turbine rotor dynamic balance, Aerospace Simulation and other devices, so it should be vigorously promoted and applied in China
At the same time, it is also widely used in petroleum, chemical industry, metallurgy, textile and other industries
Vacuum pump accessories are vacuum pumps used for noise control of vacuum pumps

  Working principle , Roots type pump is a vacuum pump without internal compression
Generally, the compression ratio is very low, so high and medium vacuum pumps need a front stage pump It is a vacuum pump that realizes air extraction by moving gas under the pushing action of synchronous and reverse rotation of a pair of blade rotors in the pump cavity Roots vacuum pump refers to a mechanical vacuum pump with a pair of soled rotors rotating synchronously and at high speed
This pump can not pump air alone
The front stage needs to be equipped with oil seal, water ring, etc
to directly exhaust the atmosphere Its structure and working principle are similar to roots blower
When working, its suction port is connected with the evacuated container or the main pump of vacuum system

  A machine that sucks gas out of the equipment so that the pressure in the equipment is lower than one atmospheric pressure is called a vacuum pump
In fact, the vacuum pump is a kind of gas conveying machinery, which transports the gas from the environment below one atmospheric pressure to the atmosphere or the environment with the same atmospheric pressure

  In the use of vacuum pump in chemical production, vacuum pump is often used to create a certain degree of vacuum to realize the process operation process
For example, under the suction of the vacuum pump, the filtration speed of the solution is accelerated; When separating the liquid mixture, the distillation temperature can be reduced to avoid possible coking and decomposition in high-temperature distillation; The temperature of drying solid materials decreases and the speed is accelerated; After the heat pipe of the heat pipe heat exchanger is vacuumized, distilled water is injected, which greatly speeds up the heat transfer rate and so on
Electronics and defense industries often need a higher vacuum

  The types of vacuum pumps can be divided into dry vacuum pumps and wet vacuum pumps according to working conditions
Yu type vacuum pump can only pump Chu gas from the equipment, and its vacuum degree can reach 96y / & mdash; 99
9}/； Wet vacuum pump can extract gas-liquid mixture, and its vacuum degree can reach 80% & mdash; 85%。
  When the vacuum pump works, it continuously extracts the gas in the container to reduce the gas in the container and gradually reduce the pressure
When the gas pressure in the container is lower than a certain low value, the following situations often occur: the liquid in the container vaporizes; The air volume leaked back from the high-pressure side of the pump is the same as that of the vacuum pump; The pressure ratio of the vacuum pump is too high, which terminates the suction process
At this time, the pressure in the container will not be reduced, so the pressure cannot be reduced to vacuum indefinitely
There are many kinds of vacuum pumps
According to the structural form, they can be divided into reciprocating vacuum pump, rotary vacuum pump, also known as rotary vane vacuum pump or water ring vacuum pump, water jet vacuum pump, vacuum pump unit and so on

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