Understanding the sealforce behavior is critical in determining the reliability/operability and vibration of centrifuge pumps. In order to study the effect of different labyrinth seal structure on rotordynamic, the Madyn2000 is used to compute the stiffness coefficient, damping coefficient and critic speed for several types of tooth height, tooth pitch, tooth thickness. And the sensitivity of different parameters is investigated. The results show that the sealforce of annular seal is stronger than the labyrinth sea. The influence of tooth height on critical speed is more sufficient than tooth pitch and tooth thickness. As tooth height increases in labyrinth seal, the direct stiffness coefficient (k) and cross stiffness coefficient(kq) decrease, while the direct damping coefficient(m) and direct damping coefficient(mq) change softly.
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The Study of Labyrinth Seal Force Behavior of Multistage Centrifugal Pumps[J].China Rural Water and Hydropower, 2021(1): 158-161
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