A vacuum generator is a new type of high-efficiency, clean, economical, and small vacuum component that uses a positive pressure air source to generate negative pressure. It becomes very easy and convenient to obtain negative pressure in places. Vacuum generators are widely used in industrial automation in the fields of machinery, electronics, packaging, printing, plastics and robotics.
Brief introduction of the vacuum generator
Vacuum components use vacuum pressure as a power source, as a means to achieve automation, and have been used in electronics, semiconductor component assembly, automobile assembly, automatic handling machinery, light industrial machinery, food machinery, medical machinery, printing machinery, plastic products machinery, packaging. Machinery, forging machinery, robots and many other aspects have been widely used.
There are two types of vacuum generators: vacuum pumps and vacuum generators. A vacuum pump is a machine that forms a negative pressure at the suction port, the exhaust port is directly connected to the atmosphere, and the pressure ratio between the two ends is very large. The vacuum generator is a pneumatic component that uses the flow of compressed air to form a certain degree of vacuum. Compared with the vacuum pump, it has a simple structure, small volume, lightweight, low price, convenient installation, easy compounding with accessories, and vacuum generation. It is suitable for intermittent work with small flow, and suitable for scattered use.
Principle of the vacuum generator
A vacuum generator is a new type of high-efficiency, clean, economical, and small vacuum component that uses a positive pressure air source to generate negative pressure. It becomes very easy and convenient to obtain negative pressure in places. The traditional use of vacuum generators is to cooperate with suction cups for adsorption and handling of various materials, especially suitable for adsorption of fragile, soft, thin non-ferrous, non-metallic materials or spherical objects. In this type of application, a common feature is that the required pumping volume is small, the vacuum degree is not required, and the operation is intermittent. The analysis and study of the suction mechanism of the vacuum generator and the factors affecting its working performance have practical significance for the design and selection of the positive and negative pressure gas paths. Quick and easy automatic selection of vacuum generators is included.
Classification of the vacuum generator
According to the nozzle outlet Mach number M1 (the ratio of the outlet flow rate to the local sound speed), the vacuum generator can be divided into subsonic nozzle type (M1<1), sonic nozzle type (M1=1), and supersonic nozzle type ( M1>1). Both subsonic nozzles and sonic nozzles are shrinking nozzles, while the supersonic nozzle type must be a first-shrinking and then expanding nozzle (ie, a Laval nozzle). In order to obtain the maximum suction flow or the highest suction pressure, the vacuum generators are designed as supersonic nozzles.
Features of the vacuum generator
1. The type with a mechanical vacuum switch.
2. The vacuum generator has a simple structure and long service life.
3. There are chemical-resistant and gas-resistant materials, which can be used in various environments. The vacuum degree produced by the vacuum generator can reach more than 90Kpa, which can be customized and mass-produced according to customer requirements.
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