Dual Arc Vane Pump Rotor Design for Heavy Fluid Handling
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Solution Overview
Problem
Existing rotary positive displacement pumps are limited in their ability to handle heavy fluids or fluids with solids due to the size and design of their rotors and vanes, which restricts their application range.
Innovation Solution
A rotary pump design featuring a rotor with diametrically opposed pockets and pivotally mounted vanes that extend and retract, allowing for a smaller rotor diameter with larger vanes, enabling efficient fluid handling and operation with fluids containing solids, and accommodating both liquids and gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the rotor diameter is increased to handle heavy fluids or fluids with solids, then the pump's capability to handle such fluids is improved, but the pump size and complexity increase
Solution Approach 1:
The vanes are made pivotal rather than fixed, allowing them to dynamically adjust their position between extended and retracted states. This dynamic configuration enables the same rotor to effectively handle different fluid types including heavy fluids and fluids with solids, eliminating the need for larger rotors for different applications.
Solution Approach 2:
The rotor is divided into multiple segments with separate pockets for each vane, allowing independent movement and configuration of each vane. This segmentation enables optimized fluid handling for specific applications while maintaining a compact rotor overall size.
2Adaptability or versatility
If the vane size is increased to improve fluid handling capability, then the pump's ability to move heavy fluids is improved, but the rotor diameter must be increased
Solution Approach 1:
The vanes utilize the axial dimension by extending beyond the rotor surface in the radial direction rather than increasing rotor diameter. The pivotal vanes can extend outward to provide sufficient surface area for fluid handling while the rotor itself remains compact in diameter.
3Volume of moving object
If the rotor diameter is decreased to reduce pump size, then the pump becomes more compact, but the ability to handle heavy fluids or fluids with solids is reduced
Solution Approach 1:
The pivotal vanes provide dynamic adjustment capability that compensates for the smaller rotor diameter. When handling heavy fluids or fluids with solids, the vanes can extend to maximize contact area and displacement volume, maintaining effectiveness despite the compact rotor size.
Solution Approach 2:
The pump's effective displacement parameters change based on vane position rather than rotor size. By adjusting vane extension through pivotal movement, the pump can optimize its displacement volume for different fluid types while maintaining a compact rotor diameter.
Data Source
AI summary
A rotary, positive displacement pump for fluids, having a pair of diametrically opposed vanes secured to a rotor in equally spaced, similarly contoured pockets, for movement between an extended position with a portion of the vane extending outwardly beyond the cylindrical surface of the rotor and a retracted position wherein the vane is seated entirely within its corresponding pocket. Each vane is formed of a top curved portion and a bottom curved portion, these portions meeting along a longitudinally extending line. The top portion extends from a pivot to the line and is curved so that when the vane is in retracted position it sits in a peripheral depression extending longitudinally along the rotor surface, the outer surface of this top portion of the vane conforming to the cylindrical surface of the rotor. The bottom portion is curved along a radius from that pivot, so that this lower portion is seated in and fills its corresponding pocket when the vane is in retracted position. The pump construction according to the present invention permits the use of smaller rotors and relatively larger vanes.