【Daily Question】Pump Equipment Technical Exchange Edition 20180206

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This post was last edited by foam_ZPTK on 2018-2-6 at 10:08. Participants: Reward 3 Wealth； Correct answer: Reward of 10 wealth points ； Note: A reward of 10 wealth points will be given for correct answers within 48 hours; this post is valid for 48 hours. Multiple-choice question: As shown in the figure, this pump is a ZE series single-stage, single-suction cantilever pump; the closed impeller uses an oral ring and balance holes to balance the axial force. With the pump structure remaining unchanged, if the inlet pressure of the pump reaches 4 MPa, the direction of the axial force acting on the pump during operation is (). A points to the inlet side; B points to the coupling side; C: no axial force. Correct answer: B. Due to the high inlet pressure, the coupling side is at atmospheric pressure, and the force exerted by the inlet pressure on the hub area points toward the coupling side. The axial force generated by the impeller itself can be essentially balanced, and the residual axial force within the impeller is much smaller than the force exerted on the hub by the inlet pressure. https://attach01.hcbbs.com/forum/201801/05/235057wnwxbzxb311ikvvz.jpg.thumb.jpg