Centrifugal Pendulum Absorber Radial Stop for Bumper Strain 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 potential damage.
Innovation Solution
Incorporating a radial travel stop connected to the pendulum masses, radially outward of the resilient bumpers, which aligns with the bumpers during rotation and prevents further outward expansion, thereby limiting strain and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the centrifugal pendulum absorber operates at high rotational speeds, then the vibration absorption capability is improved, but the resilient bumpers experience destructive deflection and strain
Solution Approach 1:
The radial travel stop is pre-positioned to limit the maximum radial displacement of the resilient bumper before destructive deflection can occur. By establishing this preliminary constraint, the system prevents the harmful effect (bumper damage) from occurring in the first place, allowing high-speed operation without compromising bumper integrity.
Solution Approach 2:
The radial travel stop acts as an intermediary component between the resilient bumper and the centrifugal force generated during rotation. It mediates the interaction by providing a mechanical stop that limits the force transmission to the bumper, thereby protecting it from destructive strain while still allowing the system to operate at high speeds.
2Reliability
If the resilient bumper allows greater displacement to absorb vibration, then the vibration absorption effectiveness is improved, but the bumper is more prone to damage at high speeds
Solution Approach 1:
The radial travel stop pre-establishes a safe displacement limit for the resilient bumper. This preliminary constraint ensures that the bumper can absorb vibration through controlled displacement while preventing displacement beyond the safe threshold that would lead to damage, thus simultaneously achieving reliability and preventing harmful effects.
Solution Approach 2:
The radial travel stop provides beforehand protection by limiting the maximum displacement of the resilient bumper before damage can occur. This prior constraint acts as a cushion against potential bumper failure, allowing the system to exploit the bumper's elastic properties for vibration absorption while being protected from exceeding safe limits.
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 radial travel stop effectively limits the outward deflection of the resilient bumpers, enhancing their durability and service life by preventing excessive strain and damage from high rotational speeds.
Implementation Method 1
a first radial travel stop connected to the first pendulum mass or to the second pendulum mass, located radially outward of the first resilient bumper, radially aligned with at least a portion of the first resilient bumper
Implementation Method 2
resilient bumpers to soften contact between pendulum masses as the masses displace in reaction to rotation of the absorber
Implementation Method 3
High rotational speeds of the absorber cause destructive deflection and strain on the resilient bumpers
Data Source
AI summary
A centrifugal pendulum absorber, including: a first pendulum mass; a second pendulum mass; a center plate axially located between the first pendulum mass and the second pendulum mass, connected to the first pendulum mass and the second pendulum mass, and arranged to receive rotational torque; a first resilient bumper axially located between the first pendulum mass and the second pendulum mass, and connected to the first pendulum mass and the second pendulum mass; and a first radial travel stop connected to the first pendulum mass or to the second pendulum mass, located radially outward of the first resilient bumper, radially aligned with at least a portion of the first resilient bumper, and free of contact with the first resilient bumper when the centrifugal pendulum absorber is at rest.