Viscoelastic Damper for Roller Block Vibration Control
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Solution Overview
Problem
Track-type machines experience bouncing and disturbances during service due to the transmission of loads between the roller block and the frame, which is not effectively addressed by existing technologies.
Innovation Solution
A roller mounting assembly that includes a damper positioned between the roller block and the frame, which is resiliently deformable to dampen loads and reduce vibrations and shocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid connection is used between the roller block and the frame, then structural strength and stability are improved, but shocks and vibrations are transmitted directly causing bouncing and disturbances
Solution Approach 1:
A viscoelastic damper is introduced as an intermediary element between the roller block and the frame. This damper serves as a mediator that transmits necessary structural forces while filtering out harmful shocks and vibrations, thus resolving the contradiction between maintaining structural strength and eliminating harmful vibrations.
Solution Approach 2:
The damper is constructed from viscoelastic composite materials that combine viscous damping properties with elastic recovery. This composite material structure allows the damper to simultaneously provide structural support and dissipate vibrational energy, addressing both the strength requirement and the vibration reduction need.
2Adaptability or versatility
If spacers are repositioned to adjust vertical location of the idler, then adaptability is improved, but bouncing and disturbances during operation are not addressed
Solution Approach 1:
The viscoelastic damper acts as an intermediary between the roller block and frame, providing vibration damping while accommodating the vertical position adjustment capability. This allows the system to maintain adaptability for different operating conditions while simultaneously reducing bouncing and disturbances that were not addressed by spacer repositioning alone.
Solution Approach 2:
The damper's viscoelastic properties change with temperature and frequency, allowing the system to adapt to different operating conditions. This parameter change capability complements the vertical position adjustment, providing both geometric adaptability and dynamic vibration control across varying operational parameters.
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 damper effectively attenuates shocks and vibrations, improving the stability and performance of track-type machines, especially during fine operations like grading, by limiting vertical movement between the roller block and the frame.
Implementation Method 1
The damper is resiliently deformable, relative to the roller block, to dampen loads transmitted between the roller block and the frame
Implementation Method 2
The damper is resiliently deformable, relative to the roller block, to dampen loads transmitted between the roller block and the frame
Data Source
AI summary
A roller mounting assembly for a ground-engaging track system includes a frame, and a roller block coupled to the frame and including a shaft support surface extending through the roller block. The roller mounting assembly further includes a damper resiliently deformable, relative to the roller block, to dampen loads transmitted between the roller block and the frame. Embodiments of a roller block assembly and a damping shim assembly are also disclosed.