When pumping liquid, the process of suction is the same as that of gas. On the left side of the sickle shaped space of the pump (the side of the pressure outlet), the speed of the liquid is increased due to the decrease of the water cross section.
According to Bernoulli's equation, when the speed increases, the pressure will decrease. When the liquid continues to flow forward and flows to the pressure outlet, the pressure will increase suddenly. As a result, the liquid passing through the pressure outlet will be obstructed and the speed will be slowed down. The sudden increase of pressure and deceleration will bring huge hydraulic loss, so the efficiency of water ring pump in pumping liquid is very low (compared with that of pumping gas) The efficiency is not more than 15 ~ 20%, because of the huge hydraulic loss and the "water conveyor effect" (when the liquid flows to the pressure outlet area, the liquid flows from the place with large radius to the place with small radius, and the liquid transfers its own energy to the impeller, just like the water conveyor), in fact, the head is much smaller. The head of water ring pump is smaller than that of centrifugal pump of the same size.
CL Sereis Cone Liquid Ring Vacuum Pump
Roots Blowers
Roots Vacuum Pump
没有评论:
发表评论