Hollow Disc Pump Variable Eccentricity Self-Priming
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional gear pumps are not self-priming, cannot handle a wide range of viscosities, are damaged by solid particles, and are not portable, limiting their ability to aspirate fluids from drums.
Innovation Solution
A hollow disc pump with a simplified roto-translation system using an annular element, pivot, and spring, allowing for variable eccentricity and easy miniaturization, enabling portable operation and efficient aspiration of various fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If gear pumps are used to pump fluids, then they can handle a wide range of viscosities, but they are not self-priming and cannot aspire air bubbles or high quantities of gas mixed with liquid
Solution Approach 1:
The pump is divided into two separate chambers: a first chamber for pumping liquid and a second chamber for pumping gas/air. Each chamber has its own impeller and suction inlet, allowing the pump to handle different phases independently and achieve self-priming capability while maintaining versatility for various viscosities
Solution Approach 2:
The pump system is designed to perform multiple functions by combining a liquid pumping mechanism and a gas pumping mechanism in a single device, enabling it to handle both liquid and gas phases simultaneously or separately, thus achieving self-priming while maintaining viscosity adaptability
2Productivity
If gear pumps are used, then they can pump fluids, but they are damaged by hard solid particles and require particle size to be limited to 0.5mm
Solution Approach 1:
The impellers are designed with dynamic clearance between the impeller and the pump housing, allowing the impeller to move slightly to accommodate solid particles without causing damage. This dynamic design enables the pump to handle fluids with solid particles while maintaining pumping productivity
Solution Approach 2:
The pump design changes the clearance parameter between the impeller and housing from a fixed small clearance to a larger variable clearance, allowing solid particles to pass through without causing damage to the impeller or housing, thus protecting the pump while maintaining productivity
3Adaptability or versatility
If hollow disc pumps with complex roto-translation systems are used, then they can achieve variable eccentricity and handle impurities, but the pump size cannot be reduced below a certain limit and they are not portable
Solution Approach 1:
The complex spring-based roto-translation system is extracted and replaced with a simpler direct drive mechanism. The eccentricity variation function is achieved through a simplified coupling mechanism between the motor shaft and impeller, reducing the overall pump volume while maintaining impurity handling capability
Solution Approach 2:
The mechanical spring-based roto-translation system is replaced with a simpler mechanical coupling system that achieves the same eccentricity variation function with fewer components and smaller size, making the pump portable while maintaining the ability to handle impurities
4Productivity
If conventional pumps are used, then they can pump fluids, but they lack high aspiring capacities and cannot aspire air bubbles or high quantities of gas mixed with liquid
Solution Approach 1:
The pump is segmented into separate liquid and gas pumping chambers, each optimized for its specific phase. The gas chamber impeller is designed to handle air bubbles and gas mixtures, while the liquid chamber handles the liquid phase, together achieving high aspiration capacity for mixed phases
Solution Approach 2:
The dual-chamber design provides multi-functionality, allowing the pump to aspirate and pump both liquid and gas phases simultaneously or separately, achieving high aspiration capacity for mixed phases while maintaining versatility for different fluid compositions
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 solution allows for self-priming, reversible operation, and efficient aspiration of fluids with varying viscosities and solid particles, while being portable and easy to maintain, overcoming the limitations of conventional pumps.
Implementation Method 1
The compass 106, and therefore the axis of the impeller 104, lie on the cradle 110. Precisely because the cradle 110 lies on a spring, the compass 106 (and therefore the impeller) has a possible transversal excursion (therefore a possible translation) along the housing 105'. The spring tends to keep the compass 106 in the lifted position of figure 2 and figure 3 but, nevertheless, during the rotation of the impeller such compass has also the possibility of translating transversally with respect to the axis of the shaft 105 of a pre-determined quantity in the direction of the arrow indicated in figure 3. This takes place when on the compass, and therefore on the impeller, acts a force that exceeds the one exerted by the spring, thereby bringing the latter into compression.
Implementation Method 2
A hollow disc pump has also been known for some time and bases its functioning principle on a disc-impeller that is pivoted eccentrically on the shaft of the pump.
Data Source
Figure 1~1A
Figure 2~3
Figure 4~5
AI summary
The present invention concerns a hollow disc pump that foresees: An impeller (9); A rotating shaft (3); Means (4, 5, 30, 36) to connect eccentrically the impeller (9) to the rotating shaft (3) in such a way that the impeller (9) can be conducted in rotation by said rotating shaft and contextually can translate, moving near and/or moving apart transversally with respect to the longitudinal axis of said rotating shaft (3); Characterized in that said means comprise a guiding hole obtained transversally in the rotating shaft and a ring (30) suitable for connecting with the impeller (9) and of such internal diameter that the rotating shaft is inserted in such ring with a predetermined radial play, and wherein said ring is provided with a radial pivot (5) that is inserted slidingly in said guiding hole of the shaft in such a way that the ring can move transversally with respect to the rotating shaft (9) through said pivot (5) that can slide in the guiding hole, and wherein elastic means (4) are further foreseen, arranged in such a way that said ring (30) is kept eccentric with respect to the longitudinal shaft with a pre-determined transversal play (d).