【Mechanical Equipment Technology Exchange Edition】Mechanical Equipment 【Daily Question】20201110
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This post was last edited by wyr261 on 2020-11-10 at 13:24. The balance device of a centrifugal pump is designed to counteract the (B) of the pump rotor. A Radial force B Axial force C Liquid pressure D Turbine vibration
Choose B. Explanation: When a centrifugal pump is in operation, it creates a certain degree of negative pressure, which causes the impeller and the axial motor to shift. If no technical measures are taken to control this displacement, friction will occur between the impeller, the guide vanes, as well as the casing and seals. This wear can quickly cause the water pump to lose its normal operating capacity, or even result in its complete destruction. Therefore, during design, an additional balance disk is added behind the first stage at the end of the impeller, in order to balance the axial thrust between the suction and discharge sides and achieve equilibrium.