Replaceable Load Beam Inserts for Dry Coal Extrusion Pumps
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Solution Overview
Problem
Current dry coal gasification processes face inefficiencies in mechanical solids pumping, particularly in preventing solids backflow and blowout, which reduces the overall mechanical efficiency and thermal performance.
Innovation Solution
A load beam assembly and track system for a dry coal extrusion pump is designed with specific geometries and materials to minimize mechanical stress and maximize efficiency, featuring parallel and opposed track assemblies, scraper seals, and adjustable tension to maintain a linear passageway and prevent stagnation, allowing for near isentropic conditions and efficient particulate transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional load beam assemblies are used in dry coal extrusion pumps, then the basic pumping function is maintained, but mechanical solids pumping efficiency is reduced due to solids backflow and blowout
Solution Approach 1:
The load beam assembly is segmented into modular components including interchangeable inserts (wear plates, tension plates, bearing plates) that can be independently replaced. This segmentation allows optimization of each component's function to reduce solids backflow and blowout, thereby improving mechanical solids pumping efficiency without increasing overall energy loss
Solution Approach 2:
The patent implements adjustable tensioning mechanisms and interchangeable inserts with varying material properties and geometries. By changing parameters such as insert material hardness, thickness, and tensioning force, the system optimizes the balance between preventing solids backflow (improving productivity) and minimizing mechanical work on solids (reducing energy loss)
2Reliability
If wear-resistant materials are used in load beam inserts, then durability is improved, but device complexity increases due to multiple interchangeable components
Solution Approach 1:
The interchangeable inserts are designed with universal mounting interfaces and standardized dimensions, allowing the same basic insert design to serve multiple functions (wear protection, tension adjustment, bearing support). This universality reduces device complexity despite the presence of multiple interchangeable components, while maintaining improved durability through selective material usage
3Productivity
If tight tolerances are applied to track alignment, then backflow and blowout are minimized, but manufacturing precision requirements increase
Solution Approach 1:
The patent incorporates adjustable and movable components (tensioning mechanisms, positionable inserts) that allow dynamic adjustment of track alignment during operation. This dynamic capability enables the system to compensate for manufacturing tolerances and maintain optimal alignment for preventing backflow and blowout without requiring extremely tight manufacturing precision
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A track assembly (28A) for a particulate material extrusion pump (10) includes a link assembly (30) with a roller bearing (34). An insert (76) is mounted to a load beam (18A) located such that the roller bearing (34) contacts the insert (76).