Flywheel Centrifugal Pendulum with Spring Brake Damping
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Solution Overview
Problem
Existing centrifugal pendulum designs face challenges in effectively damping torsion vibrations across a wide speed/frequency range while minimizing component damage and noise, particularly due to conflicts between achieving a large repayment effect and avoiding intense contact at the end of the railway, which often require additional friction or brake devices that increase installation space and wear.
Innovation Solution
A centrifugal pendulum with a spring brake element featuring a bending spring made of sheet metal, positioned outside the axis of rotation, which is pre-tensioned during assembly to apply a force that brakes and dampens the pendulum mass's movement, using a plate spring design with fastening elements to support the spring force and reduce wear through friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional friction or braking devices are used to dampen pendulum movements, then sufficient damping effect is achieved, but axial installation space increases and component wear increases
Solution Approach 1:
The patent combines the braking function with the spring element that is already present in the centrifugal pendulum design. The spring element serves dual purposes: providing the restoring force for pendulum motion and acting as a brake element through friction contact with the pendulum mass. This merging eliminates the need for separate braking devices, thereby maintaining sufficient damping effect while reducing axial installation space.
Solution Approach 2:
The spring element is designed to perform multiple functions simultaneously: it acts as both the restoring force mechanism for the pendulum and as a brake element. By making the spring element universal, the design achieves damping and braking functions without requiring additional dedicated components, thus optimizing space utilization while maintaining reliability.
2Reliability
If additional friction or braking devices are used to dampen pendulum movements, then sufficient damping effect is achieved, but component wear increases
Solution Approach 1:
The braking function is merged with the existing spring element rather than adding separate friction-based braking devices. This integration reduces the number of friction contact interfaces, thereby minimizing wear on individual components while maintaining the necessary damping effect through the spring-friction interaction.
3Reliability
If roller conveyor shapes are optimized for high damping effect, then damping performance improves, but contact force ratios worsen and intensive impacts occur
Solution Approach 1:
The spring element acts as a cushioning mechanism that prepares for and absorbs impacts before they become harmful. By incorporating the spring-brake system, the design provides gradual resistance through friction and elastic deformation, preventing sudden intense impacts on the roller conveyor while maintaining effective damping of pendulum movements.
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 solution effectively dampens torsion vibrations with low wear and noise, allowing for efficient vibration repayment and reduced operational noise and wear, while also simplifying assembly and design by utilizing the spring force indirectly on the pendulum flange.
Implementation Method 1
The spring brake element primarily serves to decelerate and/or dampen the pendulum mass. It acts as a spring and/or hysteresis device to decelerate and dampen the pendulum mass oscillations at the pendulum flange.
Implementation Method 2
the spring brake element has at least one sheet metal bending spring which rests on the outside of the pendulum mass in the direction of the axis of rotation
Implementation Method 3
the spring brake element has at least one sheet metal bending spring which rests on the outside of the pendulum mass in the direction of the axis of rotation, is fixed to the pendulum flange by means of at least one fastening element
Data Source
Figure 1~5
AI summary
Centrifugal pendulum (1) for damping torsional vibrations, in particular for a flywheel (22), comprising a pendulum flange (4) rotatable about an axis of rotation (2) and which can be connected to a drive train element (3) of the drive train, in particular the flywheel (22), in a rotationally fixed manner, and at least one pendulum mass (5) which is movable to a limited extent relative to the pendulum flange (4), wherein the centrifugal pendulum (1) has at least one spring brake element (8) for braking and damping the movements of the pendulum mass (5) relative to the pendulum flange (4), characterized in that the spring brake element (8) has at least one sheet metal bending spring (9) which bears against the outside of the pendulum mass (5) in the direction of the axis of rotation (3), is fixed to the pendulum flange (4) by means of at least one fastening element (11) and which is supported on the drive train element (3) during assembly with or on the drive train element (3) by increasing the tension of the bending spring (8).