Liquid Pump Diffuser Outlet Design for Pressure Enhancement
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Solution Overview
Problem
Conventional liquid pumps often operate at suboptimal efficiency due to low liquid pressure and excess output, leading to inefficient operation.
Innovation Solution
A liquid pump design featuring a diffuser outlet with a decreasing cross-sectional area from the pump chamber, an impeller with radially extending vanes, and a motor-driven shaft, optimizing the cross-sectional areas and diffusion coefficient to enhance pressure and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a conventional pump with a cylindrical outlet tube of constant cross-section is used, then a sufficient amount of liquid can be provided through the outlet tube, but the pressure of the liquid is low
Solution Approach 1:
The outlet tube cross-sectional area is changed along its length, transitioning from a constant cross-section to a variable cross-section that decreases in the axial direction. This parameter change creates a diffusion effect that converts kinetic energy to pressure energy, resolving the contradiction between low pressure and sufficient flow rate
Solution Approach 2:
The outlet tube is designed with a curved, tapered profile rather than a straight cylindrical shape. This curvature and gradual area reduction create smooth flow transitions that minimize turbulence while maximizing the conversion of liquid kinetic energy to pressure, addressing both pressure and flow rate requirements
2Quantity of substance
If a conventional liquid pump operates at peak efficiency, then it outputs more liquid than is required, leading to inefficient operation
Solution Approach 1:
The outlet tube cross-sectional area is made dynamic rather than static, varying along the axial direction to match the flow requirements. This dynamic geometry allows the pump to maintain optimal efficiency across different operating conditions by adapting the flow path to convert kinetic energy to pressure, preventing excessive liquid output and energy waste
Data Source
AI summary
A liquid pump has a pump housing defining a pump chamber. A motor is accommodated within the pump housing and separated from the pump chamber by an end cap. An impeller disposed within the pump chamber is driven by the motor. The pump chamber has an inlet and one or more outlets. The outlets are located on a sidewall of the pump chamber and extend in a direction substantially tangential to an outer circumference of the pump chamber. Each outlet has a first end near the pump chamber, and a second end remote from the pump chamber. A cross-sectional area S1 of the first end is smaller than a cross-sectional area S2 of the second end, forming a diffuser within the outlet.