Segmented Sleeve Roll Structure for Adjustable Fiber Web Dewatering
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Solution Overview
Problem
Existing sleeve rolls for fiber web machines face challenges in manufacturing small-sized rolls that conform to variable belt loop surfaces, require rigid axle beams, and are laborious to maintain, with limited versatility and high stress on actuator systems.
Innovation Solution
A sleeve roll design featuring a convex forming element with a lubricated sliding surface and actuator systems, including adjustable actuators and a rigid axle beam, allows for precise compensation of bending and easy maintenance, enhancing water removal efficiency and reducing friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the convex forming element is specially shaped to conform to variable belt loop surfaces, then the water removal efficiency is improved, but the machining becomes hard and time consuming
Solution Approach 1:
The forming element is divided into multiple segments that can be independently positioned and adjusted. Each segment can be manufactured with standard machining processes, and the segments are assembled to create the overall conforming shape, avoiding the need for complex monolithic machining
Solution Approach 2:
The forming element incorporates adjustable components that allow dynamic adaptation to different belt loop surfaces. The segments can be positioned at variable angles and distances from the axis, enabling the same forming element to conform to different radii and surface profiles without requiring custom machining for each configuration
2Adaptability or versatility
If the convex forming element is bent to adapt to different sizes, then the versatility is improved, but high stresses are caused to the actuator systems and a very rigid axle beam is required
Solution Approach 1:
The forming element consists of multiple segments that can be independently adjusted in position and angle. This segmentation allows the forming element to adapt to different sleeve roll sizes through controlled positioning rather than bending, avoiding high stresses on actuators and eliminating the need for an oversized rigid axle beam
Solution Approach 2:
The system allows changing geometric parameters of the forming element configuration (segment positions, angles, distances from axis) to adapt to different sleeve roll sizes. This parameter adjustment enables versatility without requiring the forming element to be bent, thereby avoiding excessive stresses on the actuator systems
3Adaptability or versatility
If the convex forming element is bent, then the adaptability to different sizes is improved, but the size of the sleeve roll increases
Solution Approach 1:
The segmented forming element allows adaptation to different sizes through positioning adjustments rather than physical bending or expansion. The segments can be reconfigured to match different radii, maintaining a compact sleeve roll size while achieving versatility across multiple applications
4Productivity
If the actuator systems are arranged to support the convex forming element, then the water removal efficiency is improved, but the maintenance and assembly become laborious
Solution Approach 1:
The actuator systems are arranged to support individual segments of the forming element rather than a monolithic structure. This segmentation allows actuators to be accessed, maintained, or replaced independently without requiring disassembly of the entire forming element, significantly reducing maintenance labor while preserving the dewatering efficiency provided by the segmented conforming structure
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
The design enables efficient dewatering with reduced energy consumption, gentler fiber web handling, and simplified maintenance, while allowing for precise adjustment and longer belt loop life.
Implementation Method 1
The forming element has a lubricated sliding surface for the belt loop and fabric support and lubrication of the forming element
Data Source
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AI summary
The invention relates to a sleeve roll for a forming section of a fiber web machine. The sleeve roll (21) has an axle beam (28) supporting a plurality of actuator systems (52) arranged side by side and attached to a convex forming element (22). Each actuator system (52) has an actuator (53), which in one or more actuator system (52) has an adjustable reach.