Deformable Nozzle Regulator for Venturi Pump Backpressure
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Solution Overview
Problem
Existing venturi pumps face issues such as inability to pump fluids higher due to high fluid head, decreased performance from debris or contaminants blocking inlets, and potential blockage by rigid foreign objects, which are not effectively addressed by their fixed and rigid designs.
Innovation Solution
A deformable nozzle regulator made of a material like rubber, which automatically adjusts its output area in response to backpressure, increasing suction force by decreasing its output area to dislodge debris and handle obstructions, and increasing fluid velocity to overcome high fluid heads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the outlet nozzle area is fixed in existing venturi pumps, then the pump structure is simple, but the pump cannot overcome high fluid head at the outlet
Solution Approach 1:
The outlet nozzle is made of deformable material that automatically changes its cross-sectional area in response to backpressure from high fluid head. When head increases, the nozzle deforms to reduce outlet area, maintaining optimal area ratios and suction force without requiring complex mechanical adjustment mechanisms.
Solution Approach 2:
The nozzle's physical parameter (cross-sectional area) changes automatically in response to operating conditions. The deformable material allows the nozzle to adjust its area ratio relative to the throat based on backpressure, optimizing pump performance across varying head conditions without fixed rigid dimensions.
2Reliability
If the inlet and throat areas are fixed in existing venturi pumps, then the pump structure is simple, but debris blocking the secondary inlet decreases pump performance
Solution Approach 1:
The deformable nozzle provides automatic feedback response to backpressure caused by debris blockage. When debris partially blocks the inlet, backpressure increases, causing the nozzle to deform and reduce outlet area, which increases suction force at the inlet to help dislodge the debris and restore flow.
Solution Approach 2:
The pump system uses its own backpressure signal to automatically adjust the nozzle area and generate increased suction force, enabling self-cleaning action against debris blockage without requiring external control systems or additional mechanical components.
3Adaptability or versatility
If the outlet nozzle has fixed area ratio to throat, then the pump design is simple, but viscous fluid requires greater suction than less viscous fluid
Solution Approach 1:
The nozzle's cross-sectional area parameter changes automatically based on backpressure, which varies with fluid viscosity. When viscous fluid is pumped, higher backpressure causes greater nozzle deformation and reduced outlet area, increasing the area ratio and suction force needed to handle the more viscous fluid effectively.
4Reliability
If the outlet nozzle is rigid, then the pump structure is simple, but rigid foreign objects may lodge in the nozzle and block the outlet
Solution Approach 1:
The outlet nozzle is constructed from deformable material that can flex and deform to accommodate rigid foreign objects. When an object enters the nozzle, the flexible material deforms around it, allowing passage without complete blockage, and returns to its original shape after the object passes through.
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 deformable nozzle regulator enhances venturi pump performance by increasing suction force, effectively dealing with debris and obstructions, and allowing the pump to handle higher fluid heads without undue complexity or cost, ensuring reliable operation.
Implementation Method 1
automatically decreases its output area as needed to decrease the pressure at an inlet of the venturi pump
Implementation Method 2
nozzle regulator constructed of a deformable material and for use in a venturi pump that automatically adjusts its output area
Implementation Method 3
a venturi is a short tube having a tapering constriction (or throat) at or near the middle of the tube. This constriction causes the velocity of the fluid at the throat to increase and a corresponding decrease in fluid pressure
Implementation Method 4
The increased velocity of the water through the venturi causes a corresponding drop in pressure
Data Source
AI summary
The automatically deformable nozzle regulator described herein is for use in a venturi pump. The automatically deformable nozzle regulator automatically adjusts its output area as needed to provide an increased suction force at a venturi pump inlet. The nozzle regulator includes an outer tubular cylinder and an inner tubular cylinder, concentrically arranged, and an inlet section join the two cylinders at one end. The nozzle regulator is constructed of a flexible material, such that when a constricting force is applied an output area of the nozzle regulator is decreased. Fluid backpressure at the nozzle regulator caused by obstructions at the pump inlet or the head at the outlet cause backpressure and the resultant constricting force. Because the nozzle is deformable, the output area is reduced, thereby increasing suction force at the inlet to remove the obstruction and increased velocity at the outlet to increase the head at the outlet.