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Wholesale Cryogenic centrifugal pump tells about the cause of centrifugal pump vibration

Wholesale Cryogenic centrifugal pump tells about the cause of centrifugal pump vibration

  • Categories:Industry News
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  • Time of issue:2021-09-29 08:02
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(Summary description)Pumps with very long shafts are prone to insufficient shaft rigidity, too much deflection, and poor shaft straightness, causing friction between the moving part (drive shaft) and the static part (sliding bearing or mouth ring), resulting in vibration. In addition, the pump shaft is too long and is greatly affected by the impact of the flowing water in the pool, which increases the vibration of the underwater part of the pump. Excessive clearance of the balance disc at the shaft end or improper adjustment of the axial working displacement will cause the shaft to move at low frequency and cause the bearing bush to vibrate. The eccentricity of the rotating shaft will cause bending vibration of the shaft.

Wholesale Cryogenic centrifugal pump tells about the cause of centrifugal pump vibration

(Summary description)Pumps with very long shafts are prone to insufficient shaft rigidity, too much deflection, and poor shaft straightness, causing friction between the moving part (drive shaft) and the static part (sliding bearing or mouth ring), resulting in vibration. In addition, the pump shaft is too long and is greatly affected by the impact of the flowing water in the pool, which increases the vibration of the underwater part of the pump. Excessive clearance of the balance disc at the shaft end or improper adjustment of the axial working displacement will cause the shaft to move at low frequency and cause the bearing bush to vibrate. The eccentricity of the rotating shaft will cause bending vibration of the shaft.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2021-09-29 08:02
  • Views:
Information

Do you know what causes the vibration of the centrifugal pump? Follow the editor of Wholesale Cryogenic centrifugal pump to have a simple understanding!
One, axis
Pumps with very long shafts are prone to insufficient shaft rigidity, too much deflection, and poor shaft straightness, causing friction between the moving part (drive shaft) and the static part (sliding bearing or mouth ring), resulting in vibration. In addition, the pump shaft is too long and is greatly affected by the impact of the flowing water in the pool, which increases the vibration of the underwater part of the pump. Excessive clearance of the balance disc at the shaft end or improper adjustment of the axial working displacement will cause the shaft to move at low frequency and cause the bearing bush to vibrate. The eccentricity of the rotating shaft will cause bending vibration of the shaft.
2. Motor
The motor structure is loose, the bearing positioning device is loose, the iron core silicon steel sheet is too loose, and the bearing stiffness decreases due to wear, which will cause vibration. Mass eccentricity, uneven rotor mass distribution caused by rotor bending or mass distribution problems, resulting in excessive static and dynamic balance.


Three, impeller
The centrifugal pump impeller is eccentric in mass. Poor quality control during the manufacturing process of the impeller, such as unqualified casting quality and processing accuracy; or the conveyed liquid is corrosive, and the impeller flow passage is eroded and corroded, resulting in eccentricity of the impeller. The number of blades of the centrifugal pump impeller, outlet angle, wrap angle, whether the radial distance between the throat tongue and the impeller outlet edge is appropriate, etc. In use, between the impeller mouth ring and the pump body mouth ring of the centrifugal pump, between the interstage bushing and the diaphragm bushing, the friction at the beginning will gradually become mechanical friction and wear, which will aggravate the vibration of the centrifugal pump. .
The above is the introduction by the editor of Wholesale Cryogenic centrifugal pump: the reasons for the vibration of the centrifugal pump.

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