Dewatering Device Inner Pipe Segmentation Wear Reduction
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Solution Overview
Problem
Existing dewatering devices for pourable or free-flowing feed materials face issues with high wear due to high pressure forces, leading to frequent replacements and downtime, and are not adaptable to varying feed material properties.
Innovation Solution
The device features a separable, slim inner pipe with passage openings designed for efficient drainage, allowing for adaptation to different materials and reducing wear by focusing maintenance on the most stressed areas, with the inner pipe being easily replaceable and made of high-strength materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high compression is applied to dewater feed material, then dewatering efficiency is improved, but wear on screw helix and jacket tube increases
Solution Approach 1:
The device is divided into modular components: the jacket tube, inner pipe, and screw shaft are separate replaceable parts. This segmentation allows individual components to be replaced without replacing the entire device, addressing wear issues while maintaining high compression capability for effective dewatering.
Solution Approach 2:
The inner pipe is designed with specific local properties (smooth surface, appropriate thickness) to reduce wear in high-stress areas. The jacket tube has reinforced sections at critical locations. This local optimization allows high compression forces to be applied effectively while managing wear at specific critical points.
2Device complexity
If fixed geometry elements are used for dewatering, then device structure is simplified, but adaptability to changing feed material is lost
Solution Approach 1:
The device incorporates adjustable elements including variable pitch screw helices and replaceable inner pipes with different geometries. These dynamic features allow the device to adapt to different feed material characteristics while maintaining a relatively simple overall structure through modular design.
Solution Approach 2:
The jacket tube serves multiple functions: structural support, compression force application, and wear resistance. The inner pipe provides both structural definition and a smooth surface for material flow. This multi-functionality reduces the need for additional components, maintaining structural simplicity while enhancing adaptability.
3Reliability
If frequent replacement of worn components is performed, then device reliability is maintained, but downtime and operational cost increase
Solution Approach 1:
The screw shaft, inner pipe, and jacket tube are designed as separable modular components that can be independently replaced. This segmentation enables quick replacement of only the worn component without disassembling the entire device, significantly reducing downtime while maintaining reliability.
Solution Approach 2:
The inner pipe is designed as a relatively simple, replaceable component that can be economically replaced when worn. This approach is more cost-effective than attempting to repair or refurbish complex components, reducing both downtime and operational costs while maintaining device reliability.
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 design enhances economic efficiency by reducing wear and maintenance intervals, allowing for better adaptation to changing feed materials and preventing clogging, thus improving the overall operational efficiency and longevity of the device.
Implementation Method 1
a worm shaft with a rotating spiral rotates, which transports the still loose feed material in cooperation with axially aligned conveyor strips
Implementation Method 2
As a result of the jacket tube tapering conically towards this end or the decreasing pitch of the screw helix, the feed material is strongly compressed and the residual water present in the feed material is squeezed out
Implementation Method 3
The crushed water is discharged through openings in the casing pipe, which are adapted in shape and size to the type of feed material
Data Source
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AI summary
The device has a housing (3) arranged along a rotational axis (2), which includes a feed area (4) and a conveying and compaction area (10) extending axially within a casing tube (9, 9'). A coaxial drive shaft (8) with circumferentially rotating helixes (16) rotates within the housing (3), compacting the feed material as it is transported from the feed area (4) through the conveying and compaction area (10). Residual water (38) present in the feed material is discharged from the device through radial openings in the casing tube (9, 9').According to the invention, it is provided that at least in a partial area the outer casing (9,9',18) is provided with passages (29,29') and an inner tube (30,30',30") is arranged inside the outer casing (9,9',18), which at least partially abuts the inner circumference of the outer casing (9,9',18) with its outer circumference and which has passage openings (35,35') at least in the area of the passages (29,29') that are many times smaller than the passages (29,29') in the outer casing (9,9',18).