Ejector Nozzle Guide Maintains Coaxial Alignment
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Solution Overview
Problem
The existing ejector design with coaxial nozzles is prone to eccentricity during assembly, leading to unstable flow rates of the working and target fluids due to the lack of positional stability between the inner and outer nozzles.
Innovation Solution
Incorporating an interval restricting part, such as nozzle guides, in the gap between the inner and outer nozzles to maintain a desired positional relationship, ensuring stable injection of the working fluid and consistent flow rates of the target fluid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inner nozzle and outer nozzle are arranged coaxially, then the ejector can inject working fluid stably, but the nozzles may become eccentric during assembly, resulting in unstable flow rate
Solution Approach 1:
A nozzle guide is introduced as an intermediary component between the inner nozzle and outer nozzle. The nozzle guide includes a guide inner diameter that fits over the outer diameter of the inner nozzle, maintaining a restricted interval. This intermediary structure ensures the nozzles remain coaxial during assembly and operation, preventing eccentricity while enabling stable working fluid injection.
2Ease of manufacture
If the interval between the inner nozzle and outer nozzle is not restricted, then the nozzles can be easily assembled, but the gap may vary, causing unstable flow rate of working fluid
Solution Approach 1:
The nozzle guide acts as a mediator that standardizes the interval between the inner and outer nozzles. By providing a fixed guide inner diameter that restricts the interval to a predetermined value, the nozzle guide ensures consistent gap dimensions during assembly, thereby maintaining stable working fluid flow rate while preserving ease of assembly.
3Reliability
If the nozzle interval is restricted to maintain coaxial relationship, then the flow rate stability is improved, but the device complexity increases
Solution Approach 1:
The nozzle guide, while adding a component to the ejector structure, provides a simple and effective solution for maintaining coaxial alignment. The guide's straightforward cylindrical design with a predetermined inner diameter offers minimal complexity while significantly improving flow rate stability through reliable interval restriction between nozzles.
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 solution stabilizes the flow rate of the working fluid and ensures a desired flow rate of the target fluid by maintaining the nozzles in a coaxial relationship, preventing eccentricity and maintaining the flow rate consistency without increasing the ejector's dimensions.
Implementation Method 1
the ejector is configured to suck a target fluid by negative pressure that is generated by a working fluid injected from at least one of an inside of the inner nozzle and the gap
Data Source
AI summary
An ejector includes an inner nozzle, an outer nozzle internally provided with the inner nozzle, and an outer injection port between the inner nozzle and the outer nozzle. The ejector is operated to suck a target fluid by negative pressure generated by a working fluid injected from the inside of the inner nozzle or/and the outer injection port, and discharge the target fluid merged with the working fluid. The ejector further includes a nozzle guide placed in the gap between the inner nozzle and the outer nozzle and configured to restrict the interval of the outer injection port.