Rotating Orifice Wheel Disc for Stronger Hydrodynamic Cavitation
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Solution Overview
Problem
Current hydrodynamic cavitation generating devices with orifice plate and venturi tube structures suffer from weakened cavitation effects over time, and those with centrifugal impeller structures are difficult to apply in material processing due to internal cavitation challenges.
Innovation Solution
A hydrodynamic cavitation generating device with a wheel disc having flow passages, an orifice plate, and a driving mechanism that induces unsteady-state cavitation by rotating the wheel disc, allowing water to transition from static to flowing state, generating intense and continuous cavitation bubbles through aligned flow passages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional orifice plate or venturi tube structures are used for hydrodynamic cavitation, then the device structure is simple, but the cavitation effect weakens over time and is not intense enough
Solution Approach 1:
The patent employs a rotating wheel disc structure that transforms static flow into dynamic rotating flow. The wheel disc rotates at controlled speeds (e.g., 10-100 rpm) to generate unsteady-state cavitation, which maintains intense cavitation effects throughout the process rather than allowing them to weaken over time as in steady-state systems.
Solution Approach 2:
The rotating wheel disc creates periodic flow patterns that generate continuous cavitation bubbles. The periodic motion of water entering and leaving the flow passages through rotation ensures sustained cavitation generation, improving both intensity and duration of the cavitation effect.
2Productivity
If centrifugal impeller structure is used for cavitation generation, then cavitation can be produced, but the cavitation occurs inside the cavity making it difficult to apply in material processing
Solution Approach 1:
The wheel disc is divided into multiple independent flow passages (e.g., 6-12 passages) arranged around the circumference. Each flow passage can independently generate cavitation bubbles that are then discharged outward, allowing the cavitation effect to be applied to external materials rather than being confined to an internal cavity.
Solution Approach 2:
The flow passages act as intermediaries that transfer cavitation bubbles from the internal water flow to the external environment. The passages serve as conduits that allow cavitation bubbles to be discharged toward material processing targets, enabling the application of cavitation effects outside the device cavity.
3Device complexity
If steady-state cavitation is used, then the device structure is simple, but the cavitation effect is not good and lacks intensity
Solution Approach 1:
The patent introduces dynamic rotation to the traditionally static orifice plate structure. The wheel disc rotates to create unsteady-state flow conditions, which significantly enhances cavitation intensity while maintaining relatively simple device structure. The dynamic effect generates more energetic cavitation bubbles compared to steady-state flow.
Solution Approach 2:
The patent changes the flow regime parameter from steady-state to unsteady-state by introducing rotation. This parameter change transforms the cavitation characteristics, producing more intense and energetic bubbles. The rotation speed and flow rate parameters are optimized to achieve the desired cavitation effect.
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
The device achieves higher intensity and pressure cavitation effects, facilitating application in material processing by allowing cavitation bubbles to flow out and interact with external materials, enhancing processing efficiency.
Implementation Method 1
the water in the wheel disc can be converted from a static state to a flowing state through the rotation of the wheel disc driven by the driving mechanism
Implementation Method 2
when the wheel disc rotates until a set flow passage is aligned with the water-inlet pipe, the water in the set flow passage is converted from static to flowing according to a set speed, generating cavitation bubbles
Data Source
AI summary
A hydrodynamic cavitation generating device and a method, including: a wheel disc, being provided with a plurality of flow passages, an orifice plate is provided inside the flow passages, and a throat orifice is provided on the orifice plate; a driving mechanism, being connected to the wheel disc, and configured to drive a rotation of the wheel disc; and a water-inlet pipe, being arranged fixedly, fitting with a first side end face of the wheel disc, and may inject water into the flow passage when being aligned with the flow passage; the cavitation effect obtained by using the hydraulic cavitation generating device is better.