Dual Spindle Helical Pump Mixer Section for Particle Prevention
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Solution Overview
Problem
Screw pumps used in mixing liquids with powders can experience particle formation due to insufficient reaction, prolonging the process or causing blockages when undissolved particles form.
Innovation Solution
Incorporating a mixer section with mixing elements on the shafts within the pump housing, allowing for shearing movement without altering the conveying direction, which prevents particle formation and enhances homogenization by destroying lumps before they enter the conveyor screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a screw pump is used to mix liquids with powders, then the pump can convey the mixture, but particle formation occurs due to insufficient mixing action
Solution Approach 1:
The patent combines the conveying function and mixing function into a single integrated pump unit. The mixing elements are incorporated directly into the pump housing, allowing the pump to both convey the liquid-powder mixture and perform mixing actions simultaneously, eliminating the need for separate mixing equipment and preventing particle formation during conveying.
Solution Approach 2:
Mixing elements are introduced as intermediary components within the pump housing. These elements act as mediators between the conveyed mixture and the pump system, providing the necessary shear forces and mixing action to prevent particle formation while allowing the conveying process to continue uninterrupted.
2Reliability
If additional mixing elements are added upstream to prevent particle formation, then mixing improves, but device complexity increases
Solution Approach 1:
The patent merges the mixing function into the pump housing itself, eliminating the need for separate upstream mixing equipment. The mixing elements are integrated directly into the pump structure, reducing the total number of components and simplifying the overall system while maintaining effective mixing action.
Solution Approach 2:
The pump housing is designed to serve multiple functions: it not only conveys the liquid-powder mixture but also provides mixing action through integrated mixing elements. This multi-functionality eliminates the need for separate mixing devices and reduces system complexity.
3Reliability
If the pump processes liquid-powder mixtures without adequate mixing, then the process time extends, but adding mixing equipment increases loss of time for setup and operation
Solution Approach 1:
The mixing elements provide continuous mixing action throughout the conveying process. As the liquid-powder mixture passes through the pump housing, the mixing elements continuously act on the mixture, ensuring homogeneous distribution without interrupting the conveying flow, thus maintaining continuous useful action throughout the process.
Solution Approach 2:
The mixing elements perform preliminary mixing action on the liquid-powder mixture as it enters the pump housing, breaking up clumps and distributing the powder before the main conveying action. This preliminary action prevents particle formation during conveying and reduces the overall time needed to achieve homogeneous mixing.
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 solution eliminates the need for additional mixing elements and effectively prevents particle formation, ensuring smooth operation and efficient mixing by introducing shear forces into the liquid.
Implementation Method 1
the mixing elements are arranged in such a way that a shearing movement can be generated in the medium to be pumped
Data Source
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AI summary
The invention relates to a twin-spindle screw pump (10) in a single-flow design with a pump housing (11) comprising a pump section (12), a bearing section (16), and a gearbox section (17) with a gearbox chamber (32), wherein the bearing section (16) and the pump section (12) are designed separately from one another, with a conveying housing part (13) as a component of the pump section (12) in which two conveying screws (24, 25) arranged on shafts (22, 23) are provided, wherein the shafts (22, 23) are supported in the bearing section (16) (external bearing) and extend into the gearbox section (17). The object of the invention is to improve the aforementioned pump (10) in such a way that particle formation is avoided.The problem is solved by the pump housing (11) having a mixer section (14) which is connected to the pump section (12), by providing a mixer housing part (15) into which the shafts (22, 23) extend, and by providing mixing elements (18, 19) on the shafts (22, 23).