Centrifugal Pump Vibration Control for Pressure Pulsation Stability
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Solution Overview
Problem
Existing methods for monitoring and controlling the internal state of centrifugal pumps are inadequate, leading to inefficiencies and fluctuations in fluid pressure and flow, which can result in poor product quality and increased energy consumption.
Innovation Solution
A system and method that utilizes sensors to detect fluid pressure pulsations and impeller position, combined with digital signal processing, to provide real-time monitoring and control of the centrifugal pump's internal state, optimizing its operation and reducing pressure pulsations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional monitoring methods are used, then device complexity is reduced, but measurement precision of pump internal state is insufficient
Solution Approach 1:
The patent replaces traditional mechanical monitoring methods with vibration-based detection and digital signal processing. Sensors detect vibrations from the pump impeller and fluid flow, which are then processed through FFT algorithms to extract operational parameters, substituting direct mechanical measurement with indirect vibration analysis.
Solution Approach 2:
The patent introduces vibration signals as an intermediary parameter to infer the internal state of the pump. Instead of directly measuring flow rate or pressure internally, the system uses vibration characteristics as a mediator that correlates with pump operating conditions, enabling indirect but precise monitoring.
2Productivity
If pump operates away from best efficiency point, then productivity increases, but use of energy increases
Solution Approach 1:
The patent implements a feedback control system that continuously monitors pump vibrations and compares the operating point against the best efficiency point (BEP). When deviations are detected, the system provides feedback to adjust the pump operation, ensuring it returns to optimal efficiency while maintaining required productivity levels.
Solution Approach 2:
The patent enables dynamic adjustment of pump operating parameters based on real-time vibration analysis. The system adapts the pump's operational state by modifying flow rate or head pressure dynamically, allowing the pump to operate at or near the BEP under varying conditions rather than at fixed settings.
3Productivity
If pump operates at high flow rate, then productivity increases, but pressure stability decreases
Solution Approach 1:
The patent utilizes periodic vibration patterns characteristic of pump operation to detect and correct pressure fluctuations. By analyzing the periodic nature of impeller vibrations and their relationship to fluid flow, the system identifies instability patterns and adjusts operation to maintain pressure stability during high-flow conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves the efficiency and stability of the pumping process by maintaining the pump at its best efficiency point, reducing energy consumption, and ensuring consistent fluid flow, thereby enhancing the quality of fluid delivery.
Implementation Method 1
a sensor (70) mounted on the casing (62) by the outlet for generating a vibration signal (SEA), SMD, dependent on pressure pulsation (PFP) in the fluid material (30) delivered from the pump (10)
Implementation Method 2
The pressure for achieving the required head is produced by centrifugal acceleration of the fluid in the rotating impeller
Implementation Method 3
The signal processing may include processing for generating information indicative of an internal state of a centrifugal pump
Data Source
AI summary
A method of operating a centrifugal pump (10) having a casing forming a volute (75) in which a rotatable impeller (20) is disposed for urging a fluid material (30) into the volute, the method comprising: monitoring a fluid pressure pulsation event inside the pump casing; generating, based on said monitoring, a vibration signal indicative of occurrence of said first fluid pressure pulsation event; generating a reference signal indicative of a rotational reference position of said rotating impeller; determining a temporal relation value (FI, FI(r)) based on time of occurrence of said fluid pressure pulsation event (SP(r)) and said reference signal.