Sealing Strip With Segmented Material Sections For Suction Roll
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional sealing strips in suction or blowing rollers face issues with abrasion resistance and the risk of material breakage due to frictional contact, as they are made of materials optimized for high abrasion resistance but are hard and brittle, leading to inefficiencies in lubricant distribution and potential damage.
Innovation Solution
The sealing strip is designed with two distinct material sections: a first material for the sealing surface and a second material for the front wall, differing in physical properties like modulus of elasticity, abrasion resistance, and hardness, allowing for optimized adaptation to reduce wear and prevent breakage, with the second material being more elastic and capable of absorbing mechanical stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the sealing strip is made of material optimized for high abrasion resistance, then abrasion resistance is improved, but the material becomes hard and brittle leading to increased risk of breakage
Solution Approach 1:
The sealing strip is divided into multiple material sections with different properties: a first material section for the sealing surface optimized for abrasion resistance, and a second material section for the front wall optimized for elasticity and breakage resistance. This segmentation allows each section to have tailored properties for its specific function.
Solution Approach 2:
Different sections of the sealing strip are made from materials with different physical properties matched to their specific functional requirements. The sealing surface uses hard, abrasion-resistant material, while the front wall uses more elastic, breakage-resistant material. This local optimization resolves the contradiction between abrasion resistance and brittleness.
2Productivity
If the front wall material section is brought into frictional contact with the roll shell to improve lubricant discharge effectiveness, then lubricant distribution is improved, but the hard and brittle material is prone to breaking out
Solution Approach 1:
The front wall is specifically made from a second material with higher elasticity and lower brittleness, tailored for frictional contact and lubricant discharge. This local material optimization allows the front wall to withstand frictional contact without breaking, while maintaining effective lubricant distribution.
Solution Approach 2:
The sealing strip uses composite construction with at least two different materials having different physical properties. The combination of hard abrasion-resistant material for sealing and elastic breakage-resistant material for the front wall creates a composite structure that simultaneously achieves effective lubricant discharge and high reliability.
3Ease of manufacture
If the same material is used for both the sealing surface and front wall, then manufacturing is simplified, but the front wall becomes prone to breakage due to its small thickness and mechanical stress
Solution Approach 1:
The sealing strip is segmented into at least two material sections: a first material section for the sealing surface and a second material section for the front wall. This segmentation allows optimization of each section's material properties for its specific function while maintaining manufacturability through defined interfaces between sections.
Solution Approach 2:
Instead of using uniform material throughout, the invention applies different materials locally where needed: the front wall uses elastic, breakage-resistant material, while the sealing surface uses abrasion-resistant material. This local differentiation resolves the contradiction between manufacturing simplicity and breakage resistance.
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 the sealing strip's durability and lubricant distribution efficiency, preventing material breakage and ensuring consistent performance by matching material properties to specific requirements, thereby improving the sealing and lubrication process.
Implementation Method 1
the lubricant is fed directly into the inlet gap between the sealing surface and the inside of the roll shell
Implementation Method 2
the sealing surface is placed against the inside of the roll shell and moves with the inside of the roll shell when the roll shell rotates in frictional contact
Data Source
Figure 1~2
Figure 3~5
Figure 4
AI summary
The invention relates to a sealing strip (1) for a sealing device for sealing off a positive or negative pressure zone of a suction or blowing roller of a machine which processes and/or produces web materials, particularly a paper, paperboard or tissue machine, said sealing strip (1) having a sealing surface that can be placed, for the purpose of sealing the positive or negative pressure zone, against the inner side (3) of a roller sheath (4) and that comes into frictional contact therewith when the roller sheath (4) is rotated, said sealing strip (1) comprising a lubricant channel (5) which is formed from a cut-out from the sealing strip, is open towards the inner side of the roller sheath, comprises a front and a rear wall (6, 7), and by means of which lubricant can be brought into the intake gap between the sealing surface (2) and the inner side (3) of the roller sheath. When viewed in the rotational movement direction (D) of the roller sheath (4), the lubricant channel (5) is arranged in front of the sealing surface (2), and the front wall (6) is arranged in front of the rear wall (7). The sealing strip (1) comprises a first material section which forms at least the sealing surface (2) and consists of a first material, and a second material section at least some sections of which form at least the front wall (6) and which consists of a second material, said first and second materials differing from one another in terms of at least one physical property such as, for example, elasticity modulus, abrasion resistance, hardness, or brittleness.