Vibration Damping System with Friction Brake Flyweight
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Solution Overview
Problem
Current vibration damping systems for torque transmission devices, such as those using pendulum-type damping systems with flyweights, are inefficient in absorbing kinetic energy and can cause a 'rebound' effect leading to system instability and accelerated degradation, while also being costly due to precise synchronization requirements of end and central stops.
Innovation Solution
A vibration damping system featuring a rotating disc with flyweights and brakes that move in opposite directions, utilizing springs to maintain frictional contact and absorb kinetic energy, thereby preventing 'rebound' and simplifying the system architecture with fewer parts, reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional stops with buffers are used to stop flyweights, then the flyweights can be stopped in clockwise or counterclockwise direction, but the stops only absorb a very small part of the kinetic energy and cause a rebound effect leading to system instability
Solution Approach 1:
A brake device is introduced as an intermediary element between the flyweight and the stop. The brake device includes a friction surface that contacts the flyweight during deceleration, acting as a mediator to gradually dissipate kinetic energy through friction before the flyweight reaches the stop, thereby preventing rebound and improving system stability
Solution Approach 2:
The brake device provides beforehand cushioning by progressively absorbing kinetic energy through frictional contact before the flyweight impacts the stop. This pre-cushioning effect prevents the sudden impact and rebound that would otherwise occur, ensuring smoother deceleration and reducing stress on system components
2Loss of energy
If central stop and end stops act simultaneously to stop flyweights, then maximum kinetic energy can be absorbed by each abutment, but precise dimensioning is required resulting in high manufacturing cost
Solution Approach 1:
The system transitions from a static stop configuration requiring precise synchronization to a dynamic brake-based system. The brake device automatically adjusts its frictional engagement based on the flyweight's motion, dynamically absorbing energy without requiring precise dimensional coordination between multiple stops, thereby simplifying manufacturing
Solution Approach 2:
The brake device extracts the energy absorption function from the stop mechanism. Instead of relying on multiple precisely positioned stops to simultaneously absorb energy, the brake device independently handles energy dissipation through friction, freeing the stop from synchronization requirements and reducing manufacturing complexity
3Reliability
If multiple damping elements and stops are used to damp vibrations, then vibration absorption capability is improved, but the system complexity and number of parts increases
Solution Approach 1:
The brake device merges multiple functions into a single component: it provides friction-based energy dissipation, guides flyweight motion through its structural design, and works in coordination with the stop mechanism. This consolidation reduces the number of separate damping elements and stops needed, simplifying the overall system architecture while maintaining effective vibration damping
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 system effectively absorbs kinetic energy stored by flyweights, prevents 'rebound' and system instability, and reduces noise pollution, while offering adjustable braking intensity and simplified, cost-effective design.
Implementation Method 1
a brake having a friction surface intended to be in frictional contact with a friction surface integral with the disc
Implementation Method 2
utilizing springs to maintain frictional contact
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A damping system (5) for a torque transmission device (3) comprising a rotating disc (4), said damping system (5) comprising a flyweight (6) having a primary end (7) and a secondary end (8), said flyweight (6) being mounted movable relative to the disc (4), the damping system (5) comprising a brake (9) having a friction surface (10) intended to be in frictional contact with a friction surface (11) rigidly connected to the disc (4), the brake (9) having a primary stop surface (12) and a secondary stop surface (13), the brake (9) being mounted movable in two opposing directions, i.e.: a primary direction under the action of the primary end (7) coming into contact with the primary stop surface (12); a secondary direction under the action of the secondary end (8) coming into contact with the secondary stop surface (13).