Milling Drum Kinetic Mass Coupling for Vibration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Earth working machines, such as road milling machines, face challenges in adapting to different milling applications while maintaining smooth operation and reducing stress on the drive train, particularly at lower rotation speeds, which can lead to vibration, uneven running, and increased fuel consumption.
Innovation Solution
A shiftable coupling system allows the kinetic mass to be coupled or decoupled from the milling drum, enabling adaptation to various applications without complex installation operations, reducing stress on the drive train, and optimizing moment of inertia for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the milling drum rotation speed is reduced to decrease fuel consumption and wear on milling tools, then fuel consumption and tool wear are reduced, but the kinetic energy of the milling drum becomes insufficient causing vibration, uneven running, and potential damage to the machine
Solution Approach 1:
The patent applies a shiftable coupling that allows dynamic adjustment of the kinetic mass configuration on the milling drum. The coupling can shift between different engagement states to modify the moment of inertia of the milling drum during operation, enabling the system to adapt to varying operational requirements while maintaining smooth running at lower speeds.
Solution Approach 2:
The patent changes the physical parameter of moment of inertia by adjusting the position and configuration of the kinetic mass on the milling drum. By modifying the mass distribution parameters through the shiftable coupling mechanism, the system optimizes the kinetic energy at lower rotation speeds, preventing vibration and uneven running while reducing fuel consumption.
2Reliability
If additional ballast weights are added to increase the kinetic energy and smoothness of the milling drum, then smooth running is improved, but the machine weight increases requiring special transport arrangements and reducing versatility
Solution Approach 1:
The shiftable coupling enables dynamic reconfiguration of the kinetic mass distribution on the milling drum. Instead of permanently adding heavy ballast weights, the system can shift and reposition existing kinetic mass to achieve the required moment of inertia, maintaining smooth running while avoiding excessive permanent weight increase.
Solution Approach 2:
The kinetic mass is divided into separable components that can be independently positioned and configured on the milling drum. The shiftable coupling allows these segmented mass elements to be repositioned to optimize the moment of inertia for different operating conditions, providing versatility without requiring a single heavy fixed ballast weight.
3Strength
If the milling drum is designed with a greater wall thickness to improve smooth running, then structural strength is improved, but the manufacturing complexity and production cost increase significantly
Solution Approach 1:
Instead of permanently increasing the milling drum wall thickness, the system uses a shiftable coupling mechanism that dynamically adjusts the kinetic mass distribution. This dynamic approach provides the necessary structural strength and smooth running characteristics without requiring complex manufacturing processes or increased material thickness.
Solution Approach 2:
The shiftable coupling acts as an intermediary mechanism between the kinetic mass and the milling drum structure. It provides the necessary structural support and smooth running characteristics through dynamic mass distribution rather than requiring increased wall thickness, thereby simplifying manufacturing while maintaining strength.
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
This solution enables smooth running, reduced fuel consumption, decreased bit wear, and extended service life of drive train components by allowing adjustable kinetic energy, thereby improving operational efficiency and adaptability.
Implementation Method 1
a ballast element, constituting a kinetic mass (57), being provided in order to increase the kinetic energy of the milling drum (30)
Implementation Method 2
enabling adaptation to various applications without complex installation operations, reducing stress on the drive train, and optimizing moment of inertia for efficient operation
Data Source
AI summary
An earth working machine (10), in particular a road milling machine, a stabilizer, or the like, having a milling drum (30) that is mounted rotatably on a machine frame (11) and is populated or populatable on its outer circumference with working tools (31); the working tools (31) to come into contact, during working operation, with the ground that is to be worked to remove it; a drive unit (20) drives the milling drum (30) by means of a drive motor (21); an input drive shaft (33) couplable to the drive motor (21) is attached to the milling drum (30); and a ballast element, constituting a kinetic mass (57), increases the kinetic energy of the milling drum (30). The kinetic mass (57) is couplable to or decouplable from the rotatable milling drum (30), or a rotational member indirectly or directly coupled to the milling drum (30), via a shiftable coupling (55).