Radial-Grooved Side Liner for Centrifugal Pump Wear Reduction
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Solution Overview
Problem
Centrifugal slurry pumps experience high wear on side liners due to slurry migration and internal recirculation, leading to a short lifespan of these components, particularly in mill circuit duties with low flow rates.
Innovation Solution
The introduction of a side liner with radially extending grooves on its surface, which are designed to counteract the curvature of the impeller vanes, reducing localized wear by altering the flow pattern and minimizing slurry recirculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the side liner is made smooth without grooves, then the manufacturing is simpler and the surface is more uniform, but the wear resistance is reduced due to localized wear and gouging from slurry recirculation
Solution Approach 1:
The side liner surface is modified with grooves at specific locations where slurry recirculation causes localized wear. The grooves are positioned radially from the inner edge to the outer edge, creating localized flow paths that divert slurry away from high-wear areas. This local modification provides wear resistance without requiring complete redesign of the entire liner surface.
Solution Approach 2:
The side liner surface is segmented into multiple radial grooves that divide the flow path into separate channels. These grooves segment the slurry flow, preventing concentrated recirculation patterns and distributing the wear across multiple pathways. The segmentation creates a patterned surface that actively manages flow dynamics to reduce localized gouging.
2Reliability
If auxiliary or expelling vanes are added to the impeller, then the slurry flow recirculation is reduced and wear on side liners is decreased, but the device complexity increases
Solution Approach 1:
The radial grooves on the side liner act as an intermediary element that mediates between the slurry flow and the impeller vanes. Instead of modifying the impeller structure directly, the grooves provide a flow control mechanism that interacts with the slurry, creating a centrifugal field that reduces recirculation. This approach achieves wear reduction without adding complexity to the impeller assembly.
3Reliability
If the groove depth is increased, then the wear resistance is improved by better flow diversion, but the manufacturing complexity and potential impact on pump performance increase
Solution Approach 1:
The groove depth is optimized as a critical parameter to balance wear resistance with manufacturing feasibility and pump performance. By carefully selecting the groove depth, the design achieves sufficient flow diversion to prevent localized wear while avoiding excessive complexity in manufacturing. The parameter optimization ensures the grooves are deep enough to be effective but not so deep as to compromise liner strength or pump efficiency.
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 grooved side liner design significantly reduces wear on the side liners, extending their operational lifespan by dissipating energy and preventing gouging, thus improving the pump's durability and efficiency.
Implementation Method 1
The expelling vanes rotate the slurry in the gap creating a centrifugal field and thus reducing the driving pressure for the returning flow, reducing the flow velocity and thus the wear on the side liner
Implementation Method 2
The grooves of the side liner may reduce localized wear, or gouging, by extending a run time for the centrifugal pump between maintenance shutdowns
Data Source
AI summary
Disclosed is side liner for a centrifugal pump. The side liner comprises an aperture for access to a central chamber of the centrifugal pump through the side liner. The side liner also comprises a plurality of grooves on a surface contacting material pumped by the centrifugal pump, the plurality of grooves extending radially from an inner edge of the surface, located near the aperture, to an outer edge.