Water Pump Anti-Cavitation Adjusting Apparatus
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Solution Overview
Problem
Existing adjusting apparatuses for water pumps have a narrow adjusting range and poor anti-cavitation efficiency, leading to ineffective anti-cavitation effects.
Innovation Solution
The design incorporates a first and second pressure adjusting cavity to provide a higher and more stable pressure liquid jet for a centrifugal impeller, utilizing an adjusting device and jet device to adjust anti-cavitation effects across various operating conditions, with a controller monitoring and adjusting flow and pressure to improve cavitation inhibition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single pressure adjusting cavity is used to spray liquid to the impeller inlet, then the anti-cavitation effect is improved, but the adjusting range remains narrow and pressure stability is insufficient
Solution Approach 1:
The single pressure adjusting cavity is divided into two separate pressure adjusting cavities: a first pressure adjusting cavity connected to the impeller inlet and a second pressure adjusting cavity connected to the impeller front edge. This segmentation allows independent pressure control for different regions, expanding the adjusting range and improving adaptability to various operating conditions while maintaining anti-cavitation effectiveness.
Solution Approach 2:
The patent introduces adjustable flow control valves in each pressure adjusting cavity, enabling dynamic adjustment of liquid flow rates and pressures according to different operating conditions. This dynamic control capability expands the adjusting range and allows the system to adapt to varying cavitation risks at different operating points.
2Object-affected harmful factors
If high-pressure liquid is sprayed to the impeller inlet, then cavitation is suppressed, but the pressure stability of the liquid jet is insufficient
Solution Approach 1:
The patent designs a pressure stabilizing structure in the form of pressure adjusting cavities with sufficient volume, which act as pressure buffers. These cavities cushion pressure fluctuations before the liquid reaches the impeller, providing more stable pressure conditions for effective cavitation suppression.
Solution Approach 2:
The pressure adjusting cavities serve as intermediary chambers between the water source and the impeller surface. These intermediaries smooth out pressure variations and provide consistent high-pressure liquid jets, improving pressure stability while maintaining cavitation suppression capability.
3Object-affected harmful factors
If the liquid jet pressure is increased to improve anti-cavitation effect, then cavitation suppression is enhanced, but the energy consumption increases
Solution Approach 1:
Instead of increasing pressure uniformly throughout the entire water delivery system, the patent applies high pressure locally only at the two critical locations (impeller inlet and front edge) where cavitation occurs. This localized pressure application achieves effective cavitation suppression while minimizing overall energy consumption.
Solution Approach 2:
The patent uses partial action by directing liquid jets to only the specific areas of the impeller where cavitation is most severe (inlet and front edge), rather than spraying the entire impeller surface. This targeted approach reduces the total volume of high-pressure liquid required, thereby reducing energy consumption while maintaining effective cavitation suppression.
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
This solution provides a wider adjusting range and significantly enhances the anti-cavitation efficiency and stability of the water pump, effectively addressing the limitations of prior art by optimizing the liquid jet's pressure and direction for improved performance.
Implementation Method 1
improving an anti-cavitation effect of a water pump
Implementation Method 2
guiding high-pressure water at the back pressure side of the water pump or a pumping chamber to an inlet of an impeller
Data Source
AI summary
The present invention discloses an adjusting apparatus for improving an anti-cavitation effect of a water pump. The adjusting apparatus comprises a centrifugal impeller (10), a volute (20), an adjusting device (30), a jet device (40), a pressure and/or flow monitoring device, and a controller. The centrifugal impeller comprises a rear side labyrinth seal (15) and a front side labyrinth seal (16), and the volute comprises a first sealing portion (21), a first pressure adjusting cavity (22), a second sealing portion (23) and a second pressure adjusting cavity (24), where the position of the first sealing portion is provided with the first pressure adjusting cavity, the position of the second sealing portion is provided with the second pressure adjusting cavity, the second pressure adjusting cavity is in communication with the first pressure adjusting cavity through the first pipeline.