Flow state of vacuum system of stainless steel vacuum pump

For some meteorological terms, we may not understand, such as airflow, it refers to the movement of air flow, that is, the force of air on objects, in some closed working environment or equipment has an important role and influence. The following is mainly for you to introduce the stainless steel vacuum pump vacuum system flow state knowledge.
1. The turbulence.
Turbulence occurs only for a short period of time at the beginning of the operation of the pump vacuum system. The pressure and velocity of gas in the pipeline are high, and the flow is in an unstable state. Turbulent streamlines have no rules and vortices, particle velocity changes rapidly, acceleration is large, and inertial forces play a dominant role in the flow.
2. Sticky flow.
When the gas pressure in the pipeline decreases gradually, the flow line starts to become regular and changes with the shape of the pipeline, and the flow becomes a flow layer with different speeds. This gas flow state is called viscous flow. At this point, internal friction begins to dominate the flow.
Stainless steel vacuum pump
Molecular flow.
Further reduction when the gas pressure, gas molecules when the mean free path of pipe diameter, the collision of gas to negligible levels, less thermal motion of the gas molecules depend on itself, the tube wall collision, molecular density gradient in the vacuum pump vacuum system pipeline, is composed of high voltage side to low voltage side, is the comprehensive effect of large molecular single movement.
4. Transition flow (turbulence - viscous flow, viscous - molecular flow)
Transition flow is an intermediate flow state, turbulence - viscous flow, due to the short turbulence is generally not considered; However, viscous - molecular flow, which spans the two fields of fluid mechanics and statistical mechanics, lacks systematic theory and generally adopts the method of revising existing theories or semi-empirical formula.
The above is the stainless steel vacuum pump vacuum system of four air states, for this kind of equipment with high sealing requirements, its air control is very important work, because it will affect the internal pressure, thus affecting the working state of the equipment, so we need to pay more attention.

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