Rotary multi-stage pump rotor rotor with a certain eccentricity in the multi-stage pump housing and pump housing fixed surface close to the surface, the rotor groove with two (or more) rotary blade, when the rotor rotates The vane can slide back and forth along its radial groove and always contact with the inner wall of the casing. The vane rotates with the rotor to divide the pump chamber into several variable volumes. Rotary vane pump is a low multi-stage pump. It can be used alone or as a foreline pump for other high vacuum pumps or ultra-high multi-stage pumps. Rotary multi-stage pump for small and medium-sized pump, the product has been serialized. Rotary vane pump has a single-stage and two-stage, generally made more than two-stage, in order to obtain a higher pump. Rotary multi-stage pump is the vast majority of single-chamber structure, commonly used two radial vane, but also useful for three inclined vane. Multi-stage pump through the vane also has applications.
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