Runnability Component Protruding Deviation Shape Air Removal
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Solution Overview
Problem
Existing runnability components in paper and board machines face challenges in creating and maintaining effective underpressure in pocket spaces, leading to inefficiencies in air removal and increased energy consumption.
Innovation Solution
A runnability component with an elongated box-like body featuring a protruding deviation shape on its exit side surface, which creates a narrow passage with the adjacent drying cylinder, enhancing air removal efficiency and reducing suction requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional runnability components are used without protruding deviation shapes, then the structure is simpler and easier to manufacture, but air removal efficiency is insufficient and energy consumption increases
Solution Approach 1:
The invention introduces a protruding deviation shape on the exit side surface of the runnability component, adding a three-dimensional feature that creates a narrow passage between the component and the drying cylinder. This dimensional change enhances air removal efficiency by creating a focused flow path without requiring complex internal structures.
Solution Approach 2:
The protruding deviation shape is strategically positioned on the exit side surface closer to the first junction, creating a localized narrow passage specifically where air needs to be efficiently removed. This local modification targets the specific functional requirement of air removal without complicating the entire component structure.
2Reliability
If the distance between the runnability component and drying cylinder is increased, then air flow is less restricted and the component is easier to install, but underpressure is reduced and air removal efficiency decreases
Solution Approach 1:
The protruding deviation shape creates a narrow passage in the horizontal dimension while maintaining the vertical spacing between components. This allows the component to be installed at standard distances while still creating an effective air removal path through the three-dimensional structure.
Solution Approach 2:
The protruding deviation shape acts as an intermediary structure that mediates between the runnability component and the drying cylinder. It creates a controlled narrow passage that maintains underpressure effectiveness without requiring the components to be in direct contact or at very close distances.
3Productivity
If suction through the turning roll is increased to improve air removal, then air removal efficiency improves, but energy consumption increases
Solution Approach 1:
The invention extracts the air removal function from the turning roll and relocates it to the runnability component itself through the protruding deviation shape. This allows air to be removed directly from the pocket space without requiring increased suction through the turning roll, thereby reducing energy consumption.
Solution Approach 2:
The runnability component with the protruding deviation shape creates its own narrow passage for air removal, making the system self-sufficient. The component itself facilitates air removal through its structured geometry rather than relying on external suction forces from the turning roll.
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 protruding deviation shape improves air removal from pocket spaces, potentially reducing energy consumption and maintaining high underpressure, making it suitable for various drying sections, including existing machines.
Implementation Method 1
the air removal from the pocket space is intensified and accelerated as the boundary layer of air associated with the moving wire facilitates the air movement in the narrow passage and away from the pocket space
Data Source
Figure 1
AI summary
The present invention relates to a runnability component for a drying section of paper machine, board machine or the like, as well as to an arrangement comprising such runnability component. The runnability component has an elongated box-like body with an entry side surface comprising at least one sealing element and an exit side surface, arranged to a distance from the entry side surface in a horizontal direction. The runnability component further comprises a lower surface, which extends from the entry side surface to the exit side surface, and which ends at a first junction, and an upper surface, which extends from the entry side surface to the exit side surface, and which is connected to the exit side surface at a second junction. The exit side surface of the runnability component comprises a protruding deviation shape with a main surface, which protruding deviation shape is arranged closer to the first junction than to the second junction.