Vane Pump With Full-Diameter Vanes for Wear Reduction
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Solution Overview
Problem
Existing rotary pumps face issues with abrasion, noise, and efficiency due to the design of vanes that extend minimally beyond the radius of the pump housing, leading to uneven flow and potential rotor stalling, especially when pressure rises at the discharge side.
Innovation Solution
A rotary pump design featuring vanes that extend fully across the diameter of the pump housing, with a non-circular cross-section and eccentric rotor placement, allowing for a larger contact area and reduced local compressive forces, which minimizes wear and eliminates the need for forced motioning of vanes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If vanes extend minimally beyond the radius of the pump housing, then the pump structure is simpler, but wear and abrasion increase
Solution Approach 1:
The vanes are extended in the radial dimension to span the entire diameter of the pump housing, transforming from short radial extensions to full-diameter elements. This dimensional change increases the contact area between vanes and housing, distributing wear more evenly and reducing localized abrasion while maintaining structural simplicity
Solution Approach 2:
The vane design implements local quality by extending the contact region between vanes and housing wall. Instead of minimal contact at the vane tip, the entire vane length now contacts the housing, creating a distributed wear pattern that reduces abrasion rates and improves reliability
2Device complexity
If vanes extend minimally beyond the radius of the pump housing, then the pump design is simpler, but noise increases
Solution Approach 1:
Extending the vanes to full diameter changes the dimensional characteristics of the pumping action, creating a more balanced and uniform flow pattern. This reduces turbulence and vortex formation that generate noise, while the simpler full-span vane design actually reduces complexity compared to complex guidance mechanisms
Solution Approach 2:
The eccentric positioning of the rotor creates an asymmetric configuration where the vanes sweep through varying radial distances. This asymmetric motion pattern, combined with full-diameter vanes, creates smoother flow transitions and reduces noise-generating turbulence compared to symmetric designs
3Device complexity
If vanes extend minimally beyond the radius of the pump housing, then the pump structure is simpler, but pump efficiency decreases
Solution Approach 1:
The full-diameter vane extension creates effective sealing surfaces that span the entire radial dimension. This dimensional change enables proper formation of pumping chambers and discharge zones, ensuring efficient medium transport while the simple vane structure maintains low complexity
Solution Approach 2:
The extended vanes create localized sealing zones along their entire length where they contact the housing wall. This distributed sealing quality prevents backflow and leakage, maintaining pump efficiency without requiring complex sealing mechanisms
4Reliability
If forced motioning of vanes is used, then continuous contact with housing is achieved, but device complexity increases
Solution Approach 1:
The vanes automatically maintain continuous contact with the housing wall through their own centrifugal force and pressure differential during rotation. The full-diameter design ensures that the vanes self-generate the necessary contact pressure without external forcing mechanisms, eliminating guides, springs, or pistons while maintaining reliable contact
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 reduces wear and noise, maintains pump efficiency by ensuring continuous sealing and preventing backflow, and allows for the use of the pump as a compressor, extractor, or vacuum pump without the risk of rotor stalling.
Implementation Method 1
the rotor (10) is arranged on an axle (9) mainly eccentrically placed related to the inner wall surface (2) of the rotor housing (1)
Data Source
Figure 1
Figure 2a~2b
Figure 2c
AI summary
Pump with a rotor (10) comprising one or more vanes (12a, 12b, ...), wherein each vane (12a, 12b, ...) is arranged to run each in a corresponding diametrical slot (141, 142 ...) in the rotor (10), each vane (12a, 12b, ...) extends from an end edge (17a1, 17b1, ...) to the opposite end edge (17a2, 17b2 ...) substantially across the entire inner diameter (Ø) of the rotor housing, between two opposite sides of the inner wall surface (2) for all rotation angles of the rotor (10), and wherein the cross-section of the cylindrical rotor housing (1) is non circular with a radius (R) from the center of the rotor (10) to the inner wall surface (2), increasing from a base radius (R0) with a given rate (DeltaR) per arclength counted from a top point (T) to 180 degrees-from the top point (T), and decreases with an equivalent rate continuously for the increasing arclength further to the top point (T).