T-Shaped Polymer Sealing Ring for Friction Reduction
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Solution Overview
Problem
Existing sealing arrangements for moving machine elements face challenges in simplifying assembly, reducing friction, and optimizing manufacturing technology and economy due to complex geometries and high frictional forces, which affect the longevity and performance of seals.
Innovation Solution
A T-shaped sealing ring with a radially configured first sealing part and an axially extending second sealing part, designed for floating installation in a congruent groove, featuring end-face channels for pressurization and rounded transitions to minimize friction and enhance sealing efficiency, using polymer materials like NBR or thermoplastic elastomers for durability and ease of production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing ring is designed with a complex geometry to improve sealing performance, then sealing reliability is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The sealing ring is divided into two distinct sealing parts: a first sealing part with a first cross-sectional shape for sealing against the groove, and a second sealing part with a second cross-sectional shape for sealing against the machine element. This segmentation allows each part to be optimized independently for its specific sealing function while maintaining overall simplicity in the design and manufacturing process.
2Force
If the first sealing part is designed to clamp the second sealing part radially to improve sealing force, then sealing pressure is improved, but frictional forces increase
Solution Approach 1:
Instead of the first sealing part clamping the second sealing part radially outward against the machine element surface, the design inverts this approach by allowing the second sealing part to extend axially beyond the groove boundaries, with the first sealing part providing axial clamping force. This inversion reduces radial friction while maintaining sealing effectiveness through axial positioning.
Solution Approach 2:
The sealing mechanism transitions from primarily radial clamping to axial clamping and positioning. The second sealing part extends axially beyond the groove in the direction of machine element movement, and the first sealing part applies clamping force in the axial direction rather than radially, reducing frictional contact with the machine element surface.
3Reliability
If the second sealing part extends axially beyond the groove boundaries to improve sealing contact, then sealing effectiveness is improved, but assembly precision requirements increase
Solution Approach 1:
The first sealing part serves a dual function: it seals against the groove and simultaneously provides clamping force to position the second sealing part axially. This self-service mechanism automatically positions the second sealing part in the correct axial location during assembly, reducing the need for high precision assembly while ensuring the second sealing part extends beyond the groove boundaries for effective sealing contact.
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 solution reduces frictional forces, minimizes abrasive wear, and allows for sensitive movement of machine elements under varying pressure differences, ensuring reliable sealing with reduced assembly errors and extended service life.
Implementation Method 1
the channels (13, 14) extend at least partially into the area of the first sealing part (6) for pressurizing the first sealing part (6) on the front side in each case
Implementation Method 2
the first and the second sealing part being formed in one piece, merging into one another and consisting of elastomeric material
Data Source
Figure 1
Figure 2
AI summary
The sealing ring (1), between two machine parts (2,3) moving against each other, has a T-shape fitting into the gap (4) between them and with its stem (6) floating within a groove (5) in one part (2). The axial sealing head (7) moves against the surface (8) of the other part (3). The sealing ring axial surfaces (9,10) bear against the surfaces (11,12) of the groove, leaving a channel (13,14) around the stem for a pressure to be applied to it. The sealing ring is in one piece, of a polymer material.