Torsional Vibration Damper Sealing for Fluid Retention and Heat Dissipation

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Solution Overview

Problem

Existing torsional vibration dampers with outwardly offset inertia rings face issues with fluid escape and limited heat dissipation due to encapsulation, leading to friction and reduced durability.

Innovation Solution

The sealing elements are vulcanized onto external axial and radial sides of the rings, forming a secure and durable connection without internal interference, using high-temperature-resistant elastomers like silicone, and incorporating a cover plate for protection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If sealing elements are fastened to internal faces of rings, then sealing effectiveness is improved, but the space between rings is reduced and moments of inertia of the inertia ring are decreased

Engineering Contradiction:

Improvesealing effectivenessVSAvoidmoments of inertia

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The sealing elements are inverted from the conventional arrangement where they are fastened to internal faces of rings, and instead are fastened to external axial sides and radial sides of the rings. This inversion resolves the contradiction by achieving effective sealing without occupying internal space that would reduce the inertia ring's moment of inertia.

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If sealing elements are fastened to rotating parts, then sealing is achieved, but friction occurs reducing durability

Engineering Contradiction:

ImprovesealingVSAvoiddurability

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The sealing elements serve as intermediaries that are fastened to non-rotating ring structures rather than directly to rotating parts. This intermediary arrangement achieves effective sealing while eliminating direct friction between sealing elements and rotating components, thereby improving durability.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Strength

If the inertia ring is encapsulated in a separate housing, then structural support is improved, but heat dissipation is limited

Engineering Contradiction:

Improvestructural supportVSAvoidheat dissipation

Core Design Contradiction:

StrengthVSTemperature

Solution Approach 1:

The sealing elements are extracted from the internal encapsulation arrangement and repositioned on external surfaces of the rings. This extraction allows the inertia ring to remain partially exposed for better heat dissipation while maintaining structural support through the ring-based sealing configuration.

Inventive Principle:

Principle #2Taking out (Extraction)

4Loss of substance

If sealing elements are positioned to cover internal faces, then fluid escape is prevented, but the space for inertia ring is reduced

Engineering Contradiction:

Improvefluid escape preventionVSAvoidspace between rings

Core Design Contradiction:

Loss of substanceVSVolume of stationary object

Solution Approach 1:

The sealing element positioning is inverted from internal face coverage to external surface fastening. This inversion prevents fluid escape through effective sealing while preserving the internal space between rings for the inertia ring structure.

Inventive Principle:

Principle #13The other way round (Inversion)

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 design ensures effective sealing without friction, maintains gap integrity, enhances inertia ring moments, and improves durability under mechanical stress, suitable for high-temperature environments.

Implementation Method 1

the respective sealing element has been vulcanized onto a respective external axial side of the first and second ring by fastening portions

Methodology Applied

Scientific EffectVulcanization:

Data Source

PatentUS12510131B2Torsional vibration damper

Publication Date: 2025.12.30 HASSE & WREDE GMBH

AI summary

A torsional vibration damper has a hub part (primary mass) that is able to be fastened to a driveshaft of a motor, and an inertia ring (secondary mass) that surrounds the hub part in the radially outer region, wherein a fluid-filled gap and sealing devices, by which the escape of the fluid is intended to be avoided, are provided between the hub part and inertia ring. The sealing devices each have a first ring, tightly connected to the hub part, and each have a second ring, tightly connected to the inertia ring, and each have a sealing element made of an elastomer, which is connected in each case sealingly to the first ring on one side and in each case to the second ring on the other side. The damper is configured such that the respective sealing element has been vulcanized onto a respective external axial side of the first and second ring by fastening portions.