Strip Sealing Gate Roller Design for Pressure Differential
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Solution Overview
Problem
Existing tape locks struggle to achieve a consistent sealing effect across different tape widths, requiring time-consuming adjustments and often resulting in suboptimal sealing results.
Innovation Solution
The tape lock design incorporates rollers with flexible, elastic material jackets, featuring an inner core with a cylindrical central area and radially widened edge regions, allowing for adjustable sealing and adaptation to varying tape widths through axially displaceable parts and optional concave sealing surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cylindrical sealing rollers are used, then the structure is simple, but the sealing effect at tape edges is insufficient
Solution Approach 1:
The roller is designed with differentiated local properties: the central area has a cylindrical contour for standard sealing, while the edge regions have radially widened contours to provide enhanced sealing at the critical tape edges. This local quality variation resolves the contradiction by improving edge sealing without unnecessarily complicating the overall roller structure.
Solution Approach 2:
The roller combines a rigid inner core with a flexible outer jacket made of elastic material. This composite structure allows the rigid core to maintain the desired contour shape (cylindrical central area with radially widened edge regions) while the flexible jacket adapts to the tape surface, improving sealing effectiveness without excessive structural complexity.
2Adaptability or versatility
If the tape lock is designed for a specific tape width, then the sealing precision is high, but the adaptability to different tape widths is poor
Solution Approach 1:
The inner core is designed with two parts that can be displaced relative to each other in the axial direction, allowing dynamic adjustment of the roller's effective sealing width. The cylindrical central area can be positioned at different locations along the roller axis to match different tape widths, while the radially widened edge regions ensure proper sealing at the tape edges regardless of the central area position. This dynamic adjustability resolves the contradiction between adaptability and sealing precision.
3Reliability
If the roller circumference is fully covered with elastic material, then the sealing contact area is increased, but the manufacturing complexity and cost increase
Solution Approach 1:
The elastic jacket is applied selectively rather than uniformly across the entire roller circumference. The jacket coverage is concentrated in the regions where sealing is most critical, particularly at the edge regions with radially widened contours. This local quality approach improves sealing contact where needed while reducing the amount of elastic material required and simplifying the manufacturing process compared to full circumferential coverage.
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 configuration significantly enhances sealing efficiency at tape edges and allows for universal use across different widths, reducing wear and maintaining effective sealing across varying pressure differences and media.
Implementation Method 1
at least one of the rollers (5, 6) is provided with a flexible, elastic material (7) at least in sections on its circumference, the at least one roller (5, 6) having an inner core (8) which is provided with a jacket (7) made of the flexible, elastic material, the core (8) being expandable in its edge regions (11, 12) in the radial direction
Implementation Method 2
A sealing element (16) can be arranged in the axial end region of the at least one roller (5, 6), which sealing element (16) contacts the end face (17) of the at least one roller (5, 6). The sealing element (16) can be arranged in such a way that it bears against the end face (17) of the at least one roller (5, 6), being elastically prestressed in the axial direction (a) by means of a spring element (18).
Data Source
Figure 1~2
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Figure 4
AI summary
The invention relates to a strip sealing gate (1) for sealing a first chamber (2) with a first pressure level (p1) in relation to a second chamber (3) with a second pressure level (p2) that differs from the first, a strip (4), in particular a metal strip, passing through both chambers (2, 3). According to the invention, at least two rollers (5, 6) are provided for sealing the chambers (2, 3), said rollers resting in a sealing manner on either side of the strip (4). The aim of the invention is to improve the sealing action. To achieve this, at least some sections of the circumference of at least one of the rollers (5, 6) are covered with a flexible elastic material (7) and said roller or rollers (5, 6) have an inner core (8) that is covered with a jacket consisting of the flexible elastic material (7). A central region (9) of the inner core (8) has a cylindrical contour (10) and the edge regions (11, 12) of the core (8) are flared.