Dewatering Screw Housing with Vertical Half-Shells
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing dewatering devices for pourable or free-flowing materials like wood chips suffer from high wear and maintenance costs due to the need for frequent replacement of screw and jacket components, resulting in lengthy downtimes and increased operational expenses.
Innovation Solution
The device features a casing tube with vertically arranged half-shells and a detachable side wall on the feed chute, allowing for easy side removal of the auger without extensive disassembly, reducing space requirements and enabling a more compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the screw and compression housing are designed for high compression of feed material, then dewatering efficiency is improved, but wear on the screw helix and jacket tube increases
Solution Approach 1:
The patent applies surface hardening (a parameter change in material properties) to the screw helix and jacket tube to increase their wear resistance while maintaining the high compression capability. This allows the device to achieve both high dewatering efficiency and reduced wear through modification of material parameters rather than changing the compression mechanism itself.
2Ease of repair
If the screw is designed to be removable for maintenance, then ease of repair is improved, but device complexity increases due to additional disassembly requirements
Solution Approach 1:
The compression housing is segmented into two separable halves that can be detached from each other. This segmentation allows the screw to be accessed and removed without requiring complete disassembly of the entire device, including the thrust bearing and reduction gear. The housing acts as two independent parts that can be separated to provide access to the screw while maintaining structural integrity during operation.
3Strength
If the housing is designed as a single piece for structural integrity, then strength is improved, but ease of repair deteriorates due to difficult screw access
Solution Approach 1:
The housing is divided into two halves that can be separated to provide access to the screw. During normal operation, the housing functions as a unified strong structure. For maintenance, the segmentation allows one half to be detached, providing direct access to the screw while the other half remains in place, maintaining structural support and reducing the complexity of maintenance operations.
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 facilitates quicker and less labor-intensive screw exchanges, reducing downtime and maintenance costs while minimizing wear on components, thus enhancing operational efficiency and reducing the stick-slip effect for smoother operation.
Implementation Method 1
by compressing it with a housing with a casing tube in which a shaft with spirals running around the circumference rotates about an axis of rotation, the feed material being transported through the housing and compacted
Implementation Method 2
a shaft with spirals running around the circumference rotates about an axis of rotation, the feed material being transported through the housing
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a device for dewatering free-flowing or free-flowing feed material, for example wood chips, by compacting it with a housing (10) comprising a casing tube (18, 21) in which a shaft (12) with circumferentially rotating helixes (13) rotates about an axis of rotation, the feed material being transported and compacted through the housing (10), and the residual water being discharged from the device through openings (15) in the casing tube (18, 21), and a feed chute (9) for supplying the feed material to be dewatered. It is characterized primarily in that the casing tube consists of two half-shells (18, 21) whose longitudinal flanges (17) are arranged vertically one above the other, and that the feed chute (9) has a removable side wall (22) whose shape and design allow the screw (12) to be removed.