A testing platform for active control of cavitation vibration frequency inside a centrifugal pump

Abstract

The invention discloses a detection platform for realizing active control of cavitation vibration frequency inside a centrifugal pump, comprising: fixing a water tank (2) on an excitation table (3) containing a vibration holding device, and passing through the water tank (2) inlet and outlet The pipeline flexible connection device (7) is installed in the pipeline of the centrifugal pump system, and the vibration table (3) is relatively fixedly installed on the base (1) through the fixed guide column (9) and the spring (10) which plays a role in balancing vibration. The frequency-modulated detection platform realizes the active vibration of the excitation table, and can detect the characteristics of strong vibration of the pump system pipeline caused by cavitation and unstable flow inside the centrifugal pump, so as to conduct in-depth analysis on the performance and fault diagnosis of the centrifugal pump. The invention can be applied to detect the occurrence and development of centrifugal pump cavitation and different vibration characteristics when cavitation is severe, and can fully understand the operating state and performance of the centrifugal pump, so as to guide the operation of the centrifugal pump, and at the same time realize the diagnosis of the cavitation state of the centrifugal pump active control.

Description

technical field [0001] The invention relates to a device for adjusting vibration frequency characteristics generated by cavitation of a centrifugal pump, in particular to a detection platform for detecting faulty operation of a centrifugal pump. Background technique [0002] Centrifugal pumps are widely used in important national economic fields such as aerospace, petroleum, chemical industry, and water conservancy. They have the advantages of simple structure, reliable performance, and convenient maintenance. When the pump is operated under design conditions, especially in small flow conditions, backflow is likely to occur at the inlet of the centrifugal pump, and the pressure in the center of the backflow vortex is extremely low, and a low-pressure area is likely to appear in the suction pipeline, and the low-pressure area will cause When cavitation is serious, it will induce low-frequency pressure pulsation in the centrifugal pump and its pipeline system, resulting in str...

AI Technical Summary

Problems solved by technology

When the pump is operated under design conditions, especially in small flow conditions, backflow is likely to occur at the inlet of the centrifugal pump, and the pressure in the center of the backflow vortex is extremely low, and a low-pressure area is likely to appear in the suction pipeline, and the low-pressure area will cause When cavitation occurs, it will induce low-frequency pressure pulsation in the centrifugal pump and its pipeline system in severe cases, resulting in strong mechanical vibration, consuming energy, and reducing the operational reliability and performance of the pump.

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