Suction Roll Sealing Strip Lubrication System
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Solution Overview
Problem
Existing suction roll sealing strip systems face issues with uneven lubrication and cleaning, leading to wear and tear, vacuum fluctuations, and potential machine downtime due to the reliance on a single spray tube for multiple sealing strips with varying lubrication needs and soiling over time.
Innovation Solution
Implementing separate lubricant supply lines and control systems for each sealing strip, allowing for targeted lubrication and cleaning, with options including spray tubes and integrated distributor channels, connected to a lubricant supply device for efficient regulation and monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single spray tube is used to lubricate all sealing strips, then the device complexity is reduced, but the lubrication uniformity deteriorates
Solution Approach 1:
The single spray tube system is segmented into multiple spray tubes, with each tube dedicated to lubricating a specific sealing strip. This segmentation allows each spray tube to be positioned and adjusted independently, ensuring uniform lubrication distribution across all sealing strips while maintaining manageable system complexity through modular design.
Solution Approach 2:
Each spray tube is configured with specific nozzle orientations, spray patterns, and lubricant flow rates tailored to the local requirements of its assigned sealing strip. This local quality approach ensures that each sealing strip receives optimally tuned lubrication, accounting for variations in contact pressure, speed, and contamination levels at different positions along the roll.
2Manufacturing precision
If separate lubrication systems are provided for each sealing strip, then the lubrication precision is improved, but the device complexity increases
Solution Approach 1:
The lubrication system incorporates dynamic control capabilities where each spray tube can independently adjust its lubricant delivery parameters in response to real-time operating conditions. This dynamic adjustment allows the system to maintain high lubrication precision while adapting to varying speeds, loads, and contamination levels without requiring excessive static complexity.
Solution Approach 2:
The control system is designed with universal components and standardized interfaces that can be replicated across multiple spray tubes. This multi-functionality approach allows a single control architecture to manage all lubrication points, reducing overall system complexity while maintaining the ability to independently control each sealing strip's lubrication requirements.
3Ease of operation
If sealing strips are not cleaned during operation, then the ease of operation is maintained, but the reliability deteriorates
Solution Approach 1:
The lubrication system continuously delivers lubricant to the sealing strips during operation, providing ongoing protection and cleaning action. This continuous useful action prevents contamination buildup that would compromise vacuum seal integrity, allowing the system to maintain reliability without requiring shutdowns for cleaning while preserving ease of continuous operation.
Solution Approach 2:
The lubricant acts as an intermediary substance that not only reduces friction but also carries away contaminants from the sealing strip surfaces. This intermediary function allows the sealing strips to be cleaned during operation without direct mechanical intervention, maintaining both ease of operation and reliability by preventing contamination-induced vacuum fluctuations.
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
Ensures consistent and reliable lubrication and cleaning of all sealing strips, extending their service life and maintaining vacuum integrity, reducing unplanned machine downtimes and improving maintenance efficiency.
Implementation Method 1
The spray pipes are each designed to apply lubricant to at least one sealing strip (4) on its run-up side in such a way that the lubricant (6) is transported by rotation of the roll shell (2) to the sealing surfaces (24)
Implementation Method 2
Each of the sealing strips (4) has at least one separate feed line (7) for the lubricant (6)... ensuring that each individual sealing strip (4) is sufficiently lubricated
Data Source
Figure 1
Figure 2~3
AI summary
A system for sealing at least one suction box (3), which adjoins a moving roll sleeve (2) of a suction roller (1) in a machine for producing or processing a fibrous web, such as a paper, tissue or cardboard machine, comprises at least two sealing strips (4) which lie in a sealing manner against the moving roll sleeve (2) via a sealing surface (24) in each case. In the region of the sealing surfaces (24) of the at least two sealing strips (4) and/or on the at least two sealing strips (4) and/or in the at least two sealing strips (4), at least one device (5) for discharging a lubricant (6) coating the at least two sealing strips (4) is provided in each case, said at least one device (5) having a supply line (7) connected thereto, through which the lubricant (6) can be supplied and wherein a separate supply line (7) is provided for each of the devices (5) of the at least two sealing strips (4). The devices (5) for discharging the lubricant (6) are each arranged such that the lubricant (6) can be applied on the run-in side to the at least two sealing strips (4) and, by rotation of the roll sleeve (2), can be transported onto the sealing surfaces (24).