Composite Pendulum Absorber Bumper for High-Speed Deflection Control
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Solution Overview
Problem
Centrifugal pendulum absorbers experience destructive deflection and strain on resilient bumpers due to high rotational speeds, leading to decreased impact absorption capabilities and potential damage from excessive outward deflection.
Innovation Solution
A centrifugal pendulum absorber design featuring a metal core enclosed by a polymer casing, where the core extends partially around a fastener, with a gap between its ends that fills with the casing, limiting outward deflection and reinforcing the bumper to enhance impact absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high rotational speeds are used in the centrifugal pendulum absorber, then the vibration absorption capability is improved, but the resilient bumper experiences destructive deflection and strain
Solution Approach 1:
The bumper is constructed as a composite structure with an inner resilient material layer providing shock absorption and an outer reinforcement layer providing structural strength. This composite design allows the bumper to withstand high rotational speeds and impact forces while maintaining its shock absorption capability, resolving the contradiction between speed and strength.
2Strength
If the resilient bumper is made entirely of soft material, then impact absorption is improved, but excessive outward deflection occurs at high speeds
Solution Approach 1:
The bumper combines a soft inner layer for impact absorption with a rigid outer layer that constrains excessive deflection. The layered composite structure allows the soft material to perform its shock absorption function while the outer layer prevents excessive outward deflection at high rotational speeds.
Solution Approach 2:
Different regions of the bumper have different material properties - the inner region is soft and compliant for impact absorption, while the outer region is rigid and restrictive to control deflection. This spatial variation in material quality resolves the contradiction between impact absorption and deflection control.
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 design increases the durability and service life of resilient bumpers by preventing excessive strain and improving impact absorption, thus enhancing the overall performance of the centrifugal pendulum absorber.
Implementation Method 1
resilient bumper to soften contact between pendulum masses as the masses displace
Implementation Method 2
High rotational speeds of the absorber cause destructive deflection of and strain on the resilient bumpers
Data Source
AI summary
A centrifugal pendulum absorber includes a center plate arranged to receive a torque, a first pendulum connected to the center plate, a second pendulum mass connected to the center plate, and a resilient bumper disposed between the first and second pendulum masses. The first pendulum mass and the second pendulum mass axially bracket the center plate. The resilient bumper is connected to the first and second pendulum masses. The resilient bumper includes a core enclosed by a casing. The core is a metal and the casing is a polymer.