Adjustable Ejector Nozzle for Pump Priming
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Solution Overview
Problem
Existing pump priming devices using air ejectors suffer from excessive compressed air consumption and inability to adjust suction capacity and vacuum levels, making them inefficient, particularly in small and medium-sized ships where energy efficiency is a concern.
Innovation Solution
An adjustable injection nozzle with a conical annular channel formed by two movable parts allows for optimization of compressed air flow and vacuum generation, enabling precise control of air suction capacity and vacuum levels by varying the flow section area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a fixed injection nozzle is used in the ejector, then the device structure is simple, but the compressed air consumption is excessive and cannot be optimized
Solution Approach 1:
The injection nozzle is designed with two movable parts (first part and second part) that can adjust relative to each other along the axis of the ejector conduit. This dynamic structure allows the flow section area of the annular channel to be varied, enabling optimization of compressed air consumption according to actual priming requirements while maintaining a relatively simple overall device structure.
2Adaptability or versatility
If a fixed injection nozzle with predetermined flow section is used, then the manufacturing is simple, but the suction capacity and vacuum level cannot be adjusted
Solution Approach 1:
The injection nozzle employs a dynamic adjustment mechanism where the second part can move relative to the first part along the ejector axis. This allows the annular channel's flow section area to be adjusted, providing adaptability in suction capacity and vacuum level control while maintaining straightforward manufacturing processes for each individual component.
Solution Approach 2:
The injection nozzle is divided into two separate parts (first part and second part) that can be manufactured independently and then assembled. This segmentation allows for easier manufacturing of each component while enabling the overall system to achieve adjustability through their relative movement.
3Adaptability or versatility
If the injection nozzle flow area is fixed, then the device operation is simple, but the priming cannot be optimized for specific installation requirements
Solution Approach 1:
The adjustable injection nozzle allows operators to customize the flow section area by moving the second part relative to the first part. This provides adaptability for different installation requirements and priming conditions while keeping the operation straightforward through direct mechanical adjustment along the ejector axis.
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 reduces compressed air consumption and enhances energy efficiency by allowing for customizable priming according to specific installation requirements, ensuring effective pump priming while minimizing air usage.
Implementation Method 1
The injection of said high speed fluid occurs downstream of inlet nozzle and due to the Venturi effect produces vacuum or low pressure zone, depending by the speed of the injected fluid, able to suck the air at the ejector inlet
Implementation Method 2
using the vacuum effect produced inside the said ejector by mean the passage of compressed air
Data Source
AI summary
Pumps priming adjustable device, realized with an ejector provided of a suction inlet and an outlet communicating through a conduit for conveying and exhausting a fluid that has been aspired from a pump or from its suction pipe, using the vacuum effect created inside the ejector itself by the flow of compressed air. The suction inlet of said ejector communicating with the pump and/or the pipe through an on-off valve which, with its opening and closing action, permits the flow of fluid aspired from pump or from its pipe into the said ejector or prevents such flow. To permit the operation of ejector is also provided an external source of compressed air connected to a feeding valve of the ejector, and between said suction inlet and said outlet there is an injection nozzle injecting compressed air into the conduit, having the injection nozzle a predetermined flow section. The injection nozzle is adjustable in said flow section, which consists of an annular channel in the peripheral wall of said conduit, which in turn being composed of two parts, a first part static and a second part movable, which may be moved towards and/or away from each other to change the flow section of the channel of injection nozzle.