Mother multistage centrifugal pump impeller lock tight as possible?

10 - 07

mother multistage centrifugal water pump impeller lock tight as possible?

mechanical seal leakage, the sleeve and the shaft leakage between ( The leakage of the shaft between) Is more common.

it is generally believed that the leakage of the shaft between the impeller is mother didn't lock, lock in fact lead to the leakage of the shaft between many factors, such as axial failure, migration, contains impurities between shaft, shaft and shaft sleeve with larger shape error, contact surface damage, shaft have clearance between components, shaft thread is too long can lead to leakage between shaft. Mother lock lock will only cause axial mat premature failure, on the contrary moderate lock to lock the mother, the shaft between the mat keeps certain compression elasticity, lock the mother in operation will automatically lock timely, remain the state of good sealing between the shaft.

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