Segmented Bearing Elements in Torsional Vibration Damper
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Solution Overview
Problem
Existing torsional vibration dampers face challenges in optimizing the space within limited installation areas of engines and internal combustion engines, where the demand for effective damping is increasing, while maintaining the freedom of movement for the flywheel ring without collision with the damper chamber.
Innovation Solution
The design incorporates bearing elements with axial and radial sections that do not extend over the entire circumference, allowing for a larger shear gap filled with viscous fluid, which maximizes the usable space and optimizes the connection between the flywheel ring and the damper housing, using L-shaped bearing sections and material webs to facilitate assembly and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bearing elements extend over the entire circumference to provide continuous support, then the flywheel ring is securely mounted, but the space for viscous fluid coupling is reduced
Solution Approach 1:
The bearing element is segmented into multiple discrete bearing sections distributed around the circumference rather than forming a continuous ring. This segmentation allows the bearing sections to provide secure mounting support while leaving gaps between them that maximize the volume available for viscous fluid coupling, directly resolving the contradiction between mounting security and shear gap volume.
2Volume of stationary object
If bearing elements are made compact to save space, then more space is available for viscous fluid, but the bearing guidance capability is reduced
Solution Approach 1:
The bearing sections are designed with locally optimized geometry where each section provides concentrated bearing capability at critical locations. The sections have increased width and/or height at the bearing contact surfaces to maintain guidance capability while keeping the overall circumferential footprint minimal, allowing adequate shear gap volume elsewhere.
3Volume of stationary object
If the damper chamber is made compact to reduce installation space, then the damper fits better in engine constraints, but the flywheel ring movement freedom is limited
Solution Approach 1:
The bearing sections are nested within the damper chamber structure, positioned strategically to provide guidance without occupying excessive space. The segmented design allows the bearing elements to be tucked into available spaces while maintaining the flywheel ring's ability to move freely within the constrained chamber volume.
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 reduces the space occupied by the bearing elements, allowing for a more effective viscous coupling and improved damping performance, while ensuring the flywheel ring is centered and securely mounted, even under heavy loads.
Implementation Method 1
a viscous fluid - for example a silicone oil - which fills the narrow shearing gap. This coupling is elastic and subject to damping.
Data Source
Figure 1
Figure 2a
Figure 2b
AI summary
A viscous torsional vibration damper includes: a) an annular damper housing, which bounds a damper chamber; b) an inertia ring arranged in the damper chamber; c) a bearing device, which supports the inertia ring in the damper housing and which has at least one bearing element with an axial bearing region and/or a radial bearing region, d) a shear gap between the inertia ring and the damper housing, which shear gap is filled with a viscous fluid, e) wherein a plurality of the axial bearing segments and/or a plurality of the radial bearing segments is circumferentially distributed on the at least one bearing element.