Variable-Area Ejector Nozzle for Flow Rate and Ejection Speed
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Solution Overview
Problem
Existing ejectors face challenges in achieving optimal performance across a wide range of flow rates, requiring different designs for varying flow rates due to limitations in nozzle size affecting speed and flow rate.
Innovation Solution
A nozzle design with an adjustable spray hole area, utilizing an elastic material and structural features like cut portions and elastic springs to adjust the flow rate and speed, allowing for optimal performance across varying flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the nozzle is made small to eject fluid at high speed, then the ejection speed is improved, but the flow rate decreases
Solution Approach 1:
The spray hole area is made dynamically adjustable through an elastic diaphragm that responds to fluid pressure. The diaphragm can deform to change the spray hole area from a first area (for high speed) to a second area (for high flow rate), allowing the nozzle to adapt its characteristics based on operating conditions rather than being fixed.
Solution Approach 2:
The physical parameter of spray hole area is changed by utilizing elastic deformation of the diaphragm. When fluid pressure increases, the diaphragm deforms to enlarge the spray hole area, thereby increasing flow rate while maintaining appropriate ejection speed. This parameter change allows a single nozzle to perform optimally across different flow rate requirements.
2Quantity of substance
If the nozzle is made large to increase flow rate, then the flow rate is improved, but the ejection speed decreases
Solution Approach 1:
The nozzle employs a dynamic spray hole area adjustment mechanism where the elastic diaphragm can contract to reduce the spray hole area when high ejection speed is required, or expand to increase flow rate when needed. This dynamic adjustment resolves the contradiction between flow rate and speed by allowing the system to optimize for each parameter independently based on operational requirements.
Solution Approach 2:
The spray hole area parameter is changed through elastic deformation of the diaphragm structure. By controlling the deformation state of the diaphragm, the system can switch between different spray hole areas to achieve either high flow rate or high ejection speed, thereby resolving the trade-off between these two parameters.
3Ease of manufacture
If a fixed nozzle design is used, then the manufacturing is simple, but the adaptability to different flow rates is poor
Solution Approach 1:
The nozzle incorporates a dynamic element (elastic diaphragm) that allows the spray hole area to adjust automatically based on fluid pressure conditions. This dynamic feature provides adaptability to different flow rates while maintaining a relatively simple overall structure, as the adjustment mechanism is integrated into the nozzle body rather than requiring complex external control systems.
Solution Approach 2:
The nozzle design incorporates elastic deformation capability that automatically changes the spray hole area parameter in response to fluid pressure variations. This parameter change mechanism provides versatility across different flow rate applications while keeping the manufacturing process relatively simple, as it utilizes the inherent elastic properties of the diaphragm material rather than requiring complex mechanical adjustments.
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 nozzle design enhances fluid transfer performance by maintaining efficiency across different flow rates, increasing contact area and improving durability through elastic adjustments.
Implementation Method 1
The second nozzle body wall may comprise an elastic material configured to cause an area of the spray hole to change based on a flow rate of the received fluid
Data Source
AI summary
A nozzle includes an intake portion into which a fluid is introduced and a connecting portion having one side connected to the intake portion and the other side having a spray hole, wherein the spray hole has an area changing, depending on the introduced fluid.