Dust Separator with Concentric Outlet Pipe to Reduce Flow Losses
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Solution Overview
Problem
Conventional dust separation systems, such as cyclones, suffer from high flow losses due to narrow internal dip tubes, leading to unfavorable energy balances and inefficiencies in separating finer dust particles.
Innovation Solution
A dust separator design featuring a tapered separation volume with a large cross-sectional outlet pipe surrounding the inlet pipe, allowing for efficient dust separation with reduced flow losses and increased separation efficiency by leveraging a conical shape and strategically placed openings to enhance airflow direction and separation area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a narrow cross-section dip tube is used for suction in conventional cyclones, then the device structure is simple, but flow losses increase significantly leading to unfavorable energy balance
Solution Approach 1:
The patent transitions from a one-dimensional narrow dip tube suction approach to a three-dimensional volumetric suction approach. The outlet pipe surrounds the inlet pipe concentrically, creating an annular separation volume that utilizes radial and axial dimensions simultaneously. This dimensional expansion allows for a large effective suction area without increasing linear dimensions, thereby reducing flow losses while maintaining structural efficiency.
Solution Approach 2:
The outlet pipe is positioned concentrically around the inlet pipe, with the outlet pipe's inner lateral surface forming the boundary of the separation volume. This nested arrangement allows the suction function to encompass the inlet function, creating an annular gap that serves as the separation zone. The nesting principle enables the system to achieve a large effective suction area without proportionally increasing the overall device size.
2Manufacturing precision
If a tapered separation volume with large cross-section outlet pipe is used, then separation efficiency for fine dust particles increases, but device dimensions and volume increase
Solution Approach 1:
The outlet pipe surrounds the inlet pipe concentrically, creating a nested configuration where the separation volume is formed in the annular gap between the two pipes. This nesting approach allows the system to achieve a large effective separation volume without proportionally increasing the external dimensions of the device, as the separation occurs within the nested structure rather than requiring additional external space.
Solution Approach 2:
The patent utilizes the radial dimension by positioning the outlet pipe around the inlet pipe, creating an annular separation volume that extends radially outward. This dimensional utilization allows the system to achieve a large separation area without increasing the axial or diametral footprint of the device, thereby improving separation efficiency while controlling overall device volume.
3Use of energy by moving object
If conventional cyclone design is used, then the structure is compact, but motor power must be increased to compensate for flow losses
Solution Approach 1:
The dust separator is segmented into distinct functional zones: the inlet pipe for contaminated air supply, the annular separation volume for particle-air separation, and the outlet pipe for cleaned air discharge. This segmentation allows each component to be optimized for its specific function, with the separation volume configured to minimize flow resistance and maximize separation efficiency, thereby reducing the motor power required to overcome flow losses.
Solution Approach 2:
By transitioning from a narrow dip tube suction approach to a volumetric annular separation volume, the patent increases the effective suction area in the radial dimension. This dimensional change reduces flow velocity and associated flow losses, allowing the system to operate with lower motor power consumption while maintaining effective dust separation performance.
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 design achieves a high separation rate with low motor power consumption, resulting in an energy-efficient dust separator capable of effectively separating fine dust particles while minimizing flow-related losses.
Implementation Method 1
standard cyclones are often used for bagless dust separation systems in vacuum cleaners, in which the air is first introduced tangentially into a cylinder. This creates a twist along the lateral surface of the cylinder, so that the air flows in a spiral to the outlet of the cylinder
Implementation Method 2
the air flows in a spiral to the outlet of the cylinder... directs the particle-filled contaminated air to a distant opening of a dip tube inside the conical area, where it is cleaned of heavier particles contained in the airflow by abruptly redirecting the airflow
Implementation Method 3
the heavier particles are separated from the lighter air flow and fall through an opening at the end of the hopper into a flow-calmed dust collection box located below this opening
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The dust collector (10) has an inlet pipe (12) for supplying a polluted air to a collection volume (14) in an intake direction (16). An outlet pipe (20) partially concentrically encloses the inlet tube for sucking the air which enters into the collection volume along inlet direction. The collection volume is tapered conically in the inlet direction.