What requirements should the impeller of water ring vacuum pump meet in the design? The design requirements of impeller of water ring vacuum pump must meet:
(1) The stress requirement is determined by the strength limit of the material. Therefore, it is necessary to accurately predict the steady state of the impeller and the vibration stress of the impeller with complex shape and high speed.
(2) The requirement of fluid power is to solve the problem of large turning and large expansion of impeller at high flow rate, and to solve other troubles when passing through small channel with high efficiency and high pressure.
(3) Although the impeller can achieve high efficiency, component matching is a basic aspect of design. Often, due to improper matching, impeller has to be redesigned, and sometimes, in order to achieve the optimal matching, it is better to sacrifice the high efficiency of impeller.
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