Axial Torsion Spring Layout for Stiffer Vibration Dampers
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Solution Overview
Problem
Existing torsional vibration dampers lack sufficient torsion stiffness, making them suboptimal for their applications, and the addition of radial torsion springs increases design and manufacturing complexity.
Innovation Solution
A torsional vibration damper with an axially aligned additional torsion spring, which is either a solid or hollow shaft, or an arrangement of bar elements, providing enhanced torsion stiffness while maintaining a simple design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If radial torsion springs are added to enhance torsion stiffness, then the torsion stiffness is improved, but the design and manufacturing complexity increases
Solution Approach 1:
The patent inverts the conventional radial arrangement of torsion springs to an axial alignment. Instead of placing springs radially outward from the rotation axis, the springs are positioned parallel to the damping device and aligned with the axial direction, fundamentally changing the spatial configuration to simplify design while maintaining torsion stiffness enhancement
Solution Approach 2:
The axially aligned torsion spring is integrated directly into the existing damper structure between the hub part and inertia ring, merging the torsion spring function with the damping device assembly. This consolidation eliminates separate radial mounting structures and simplifies the overall design
2Strength
If radial torsion springs are added to provide sufficient torsion stiffness, then the torsion stiffness is improved, but the design is not simplified
Solution Approach 1:
The patent inverts the conventional radial arrangement of torsion springs to an axial alignment. Instead of placing springs radially outward from the rotation axis, the springs are positioned parallel to the damping device and aligned with the axial direction, fundamentally changing the spatial configuration to simplify design while maintaining torsion stiffness enhancement
Solution Approach 2:
The axially aligned torsion spring serves multiple functions within the same space: providing torsion stiffness enhancement while maintaining a compact design that can be adapted to various applications through simple design tests and calculations
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 axially aligned additional torsion spring enhances the torsion stiffness of the damper, allowing for a more cost-effective and simplified design that can be adapted to various applications.
Implementation Method 1
The additional torsion spring is aligned essentially axially in relation to the torsional vibration damper. Its spring effect is mainly based on torsion about an axial direction
Implementation Method 2
The damping device may, for example, be a visco-elastic fluid, such as silicone oil, which is accommodated in a chamber between the primary part and the secondary part
Data Source
AI summary
A torsional vibration damper has a hub part, also referred to as primary mass, which can be fastened on a drive shaft of an engine, and an inertia ring, also referred to as secondary mass, which surrounds the hub part in the radially outer region. A damping device is provided between the hub part and the inertia ring. The torsional vibration damper includes an additional torsion spring, wherein the additional torsion spring is axially aligned.