Working principle
The working principle of the pneumatic vacuum generator is to use the nozzle to spray compressed air at high speed, forming a jet at the nozzle outlet, resulting in enrolling flow2. Under the enrolling action, the air around the nozzle outlet is constantly sucked away, so that the pressure in the adsorption chamber drops below atmospheric pressure, forming a certain vacuum 2.
Main feature
Simple structure: Compared with other vacuum generation equipment such as vacuum pumps, the structure of pneumatic vacuum generators is relatively simple, usually composed of several main components such as nozzles, diffusion tubes, small size, light weight, easy to install .
Fast vacuum generation: The required vacuum environment can be quickly established in a short time, the response time is short, suitable for automated production lines that need to quickly absorb and release the workpiece.
Clean and pollution-free: compressed air as the power source

, the working process does not produce oil, dust and other pollutants, in line with environmental protection requirements, especially suitable for high environmental cleanliness requirements of electronics, food and other industries.
Low cost: the price is relatively cheap, and the maintenance cost is also low, there is no need to regularly replace lubricating oil and other wearing parts like vacuum pumps, which reduces the equipment procurement and maintenance costs of enterprises.
Classification mode
According to the nozzle outlet Mach number classification: can be divided into subsonic nozzle type (M1<1), sonic nozzle type (M1=1) and supersonic nozzle type (M1>1). In order to obtain maximum suction flow or maximum suction inlet pressure, the vacuum generator is generally designed to be supersonic nozzle type 2.
Classification according to functional structure: there are ordinary type, vacuum switch type, multistage type and so on. The vacuum switch type can monitor the vacuum degree in real time, and send a signal when the set value is reached; Multistage type Through multistage series, can improve the vacuum degree and suction flow。

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