What are the main factors that affect the performance of the Vacuum Generator?

The performance of the Vacuum Generator is related to the diameter of the nozzle, the shape of the constriction and diffusion tube, the diameter of the tube and its corresponding position, and the pressure of the gas source. A Vacuum Generator suction inlet pressure, suction flow, gas consumption, and the relationship between the supply pressure curve, the supply pressure reaches a particular value, and the suction inlet pressure is low. Even if the suction flow reaches a large when the supply pressure continues to increase, the suction inlet pressure increases, and the suction flow decreases.

1. Inhalation flow characteristics analysis: the more ideal Vacuum Generator characteristics required in the standard supply pressure range (P01 = 0.4 – 0.5MPa), when in high values, and with the P01 changes smoothly.
2. Characterization of the pressure Pv at the suction inlet: The Pv characteristics of the more desirable Vacuum Generator require that in the standard supply pressure range (P01=0.4–0.5MPa), Pv is at a small value and changes gently with Pv1.
3. Under the condition that the inlet noises are entirely closed, the relationship between the pressure at the suction inlet Pv and the suction flow rate under the conditions, to obtain an ideal matching relationship between the pressure service at the suction inlet and the suction flow rate, it can be designed as a multi-stage Vacuum Generator combined in series.
4. The length of the diffusion tube should ensure that the nozzle outlet of a variety of wave systems is fully developed so that the export section of the diffusion pipeline can get an approximate uniform flow. But the pipeline is too long, and the tube wall friction loss increases—general pipework for the pipe diameter of 6 — 10 times more reasonable. An expansion angle of 6 ° to 8 ° can be added to the diffusion pipeline outlet to reduce the energy loss.
5. The adsorption response time is related to the volume of the adsorption chamber, including the diffusion chamber, the adsorption piping, the suction cup or closed chamber capacity, etc. The amount of adsorption surface leakage is related to the required pressure at the suction inlet. For the pressure requirement at the suction inlet, the smaller the capacity of the adsorption chamber, the smaller the response time; if the pressure at the suction inlet is more significant, the smaller the adsorption capacity, the smaller the surface leakage, the shorter the suction response time; if the adsorption capacity is large and the suction rate should be fast, the larger the nozzle diameter of Vacuum Generator should be.