Centrifugal Screen Basket Carrier Welded Integration
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Solution Overview
Problem
Centrifugal screen apparatuses in high-wear environments, such as coal dewatering, face challenges with bolt or cap screw damage, making it difficult to balance and service the screening assemblies, leading to increased downtime and inventory costs due to the need for frequent replacement of basket carriers.
Innovation Solution
The integration of a basket carrier portion with radial webs on the working face, forming a hydrostatic zone, which reduces wear and allows for welding instead of bolting, eliminating the need for frequent replacement and enabling dynamic balancing as a single component, thus reducing maintenance and inventory costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If bolts or cap screws are used to attach the basket to the basket carrier, then the basket can be assembled and disassembled, but the bolts suffer from worn heads, bound threads and other in-service damage making the screening assemblies difficult to service
Solution Approach 1:
The basket carrier portion is integrally formed with the basket portion, creating a single welded structure. This eliminates the separate fastening components (bolts or cap screws) that were previously used to attach the basket to the carrier, thereby removing the problems of worn heads, bound threads, and servicing difficulties while maintaining structural integrity through welding
2Duration of action of stationary object
If the basket carrier is designed to outlast 2-3 baskets, then dimensional and mechanical stability is ensured, but the cost of the basket carrier increases the inventory cost
Solution Approach 1:
By integrally forming the basket carrier with the basket portion through welding, the design allows both components to be replaced together as a single assembly. This eliminates the need to maintain expensive basket carriers in inventory for extended periods, as the integrated design simplifies the replacement strategy to matching basket life cycles, thereby reducing inventory costs
3Duration of action of stationary object
If the basket carrier is designed to outlast 2-3 baskets, then dimensional and mechanical stability is ensured, but it becomes difficult to produce a balanced set on site and requires field repair
Solution Approach 1:
The integral formation of the basket carrier with the basket portion through welding creates a unified structure that can be dynamically balanced as a single component during manufacturing. This eliminates the need for complex field repairs and balancing operations on site, as the integrated design ensures dimensional and mechanical stability while simplifying maintenance to straightforward replacement of the complete assembled unit
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 significantly reduces wear on the basket carrier and wear ring, extending the life of the basket carrier to match the screening basket, minimizing downtime and inventory costs while ensuring balanced operation.
Implementation Method 1
forming a wear reducing hydrostatic zone against the working face in use
Implementation Method 2
centrifugal screen apparatus for use in separating particulates from water
Data Source
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AI summary
Screening apparatus includes a driving a shaft (12) into a screen housing (13) having a removable closure (14) and dividing wall (15) forming an underflow chamber (16) and an overflow chamber (17). The shaft (12) supports and drives an screen (21) comprising a plate steel basket carrier portion (22) axially spaced from intermediate ring frames (23) and an outer frame ring and flange (24), all interconnected by circumferentially spaced stringers (25) to form an all-welded, integral, generally truncated-conical screen (21) cage. The cage supports a wedge wire screening surface (26). The closure (14) and housing (13) mutually support an inlet assembly (27) comprising a chute (32) feeding the water and coarse coal to the inner end of the screen assembly (21). The integral, all welded screen (21) may be replaced as a unit without refurbishment.