Flywheel Pendulum Absorber Layout for Wear-Resistant Vibration Damping
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Solution Overview
Problem
Centrifugal pendulum absorbers in flywheel arrangements for heavy-duty engines face durability issues due to wear and tear, particularly in high-power engines, leading to increased service costs and vibration problems in modern vehicles.
Innovation Solution
A flywheel arrangement with a centrifugal pendulum absorber design that separates the flywheel and ring member into different materials, allowing for tailored properties and improved durability, featuring a tautochrone curve pendulum path and lubrication to reduce friction, along with separate key members and a stopping element for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flywheel and ring member are made as separate parts with different materials, then the durability and contact stress resistance are improved, but the device complexity increases
Solution Approach 1:
The flywheel arrangement is divided into separate components: the flywheel body and the ring member, which can be manufactured from different materials optimized for their specific functions. The ring member is pressed onto the flywheel, creating an integrated assembly that combines the advantages of material specialization while maintaining structural unity.
Solution Approach 2:
The invention employs different materials for the flywheel and ring member based on their functional requirements. The flywheel is made from materials with high thermal conductivity to dissipate heat from clutch slip, while the ring member uses materials with high hardness and strength to withstand contact stresses from pendulum weight movement.
2Reliability
If the ring member is positioned radially outside the pendulum weight, then the bearing surfaces are lubricated during operation, but the manufacturing precision requirements increase
Solution Approach 1:
The lubrication system is designed to be self-activating during operation. The lubricant is introduced into the bearing surfaces, and the relative motion between the pendulum weight and ring member automatically distributes the lubricant across the contact surfaces through friction and motion, eliminating the need for external lubrication mechanisms.
3Temperature
If the flywheel is designed with high thermal conductivity to dissipate heat, then the thermal management is improved, but the contact stress resistance decreases
Solution Approach 1:
The flywheel assembly is segmented into two main components with different material properties: the flywheel body optimized for thermal conductivity and the ring member optimized for mechanical strength. This segmentation allows each component to be specialized for its primary function without compromising the other.
Solution Approach 2:
The invention uses composite construction where the flywheel body is made from materials with high thermal conductivity (such as cast iron or aluminum alloys) to dissipate heat from clutch slip, while the ring member is made from materials with high hardness and strength (such as steel) to withstand contact stresses from pendulum weight movement.
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 enhances the flywheel's ability to withstand contact stresses and dampen vibrations effectively, improving durability and reducing service costs by allowing for the use of materials optimized for thermal conductivity and hardness, while maintaining efficient vibration damping.
Implementation Method 1
Centrifugal pendulum absorbers for flywheels include a number of pendulum weights arranged circumferentially around a center axis of the flywheel, which pendulum weights are movable with respect to the flywheel, thereby dampening vibrations.
Implementation Method 2
the at least one pair of cooperating bearing surfaces together defining the predetermined pendulum path of the at least one pendulum weight
Implementation Method 3
the ring can perform a frictional sliding movement relative to the carrier disk by the pendulum motions
Implementation Method 4
A flywheel arrangement with a centrifugal pendulum absorber design that separates the flywheel and ring member into different materials, allowing for tailored properties and improved durability, featuring a tautochrone curve pendulum path and lubrication to reduce friction
Data Source
AI summary
A flywheel arrangement for an engine of a vehicle, includes:a flywheel configured to be connected to a crankshaft of the engine for common rotation around a center axis,a pendulum weight arranged between the center axis and a radially peripheral surface of the flywheel, the pendulum weight being movable with respect to the flywheel along a predetermined pendulum path,a ring member positioned radially outside of the pendulum weight, the ring member being connected for common rotation with the flywheel around the center axis, andat least one pair of cooperating bearing surfaces, each pair of cooperating bearing surfaces including an outer bearing surface provided on the ring member and an inner bearing surface provided on the pendulum weight, the at least one pair of cooperating bearing surfaces together defining the predetermined pendulum path.