Elastic Screw Shaft Mounting for Overload-Resistant Material Separation
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Solution Overview
Problem
Existing devices for separating feed material, such as recycling material and building rubble, lack sufficient strength to withstand overload, leading to potential device failure due to high transverse forces and weights, especially in applications like quarries.
Innovation Solution
The device features a rotating element mounted elastically via a damping device, with a bearing journal connected to the core tube, allowing for evasive movement transverse to the axis of rotation, and a ratio of the diameter of the bearing journal to the gauge increased beyond 0.3, enhancing load-bearing capacity and resilience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the rotating element is rigidly mounted to increase structural strength, then the device can withstand higher loads, but the device becomes vulnerable to overload damage from transverse forces and falling impulses
Solution Approach 1:
The rotating element is mounted on elastic bearings that allow dynamic movement and absorption of transverse forces and falling impulses, transforming the rigid static mounting into a flexible dynamic system that can withstand overload without damage
Solution Approach 2:
Elastic bearings are installed in advance to cushion and absorb the impact of transverse forces and falling impulses before they can cause damage to the rotating element or mounting structure
2Strength
If the diameter of the bearing journal is increased to improve load-bearing capacity, then the device can handle heavier feed material, but the device complexity and manufacturing cost increase
Solution Approach 1:
The diameter of the bearing journal is optimized to a specific range (0.15-0.3 times the gauge between rotating elements) to achieve the necessary load-bearing capacity while avoiding excessive dimensions that would increase complexity and cost
3Reliability
If elastic mounting is used to reduce damage from transverse forces, then the device becomes more resilient to overload, but the mounting complexity increases
Solution Approach 1:
Elastic bearings serve as an intermediary element between the rotating element and the mounting structure, providing the necessary elasticity and shock absorption while maintaining a relatively simple overall mounting design
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 design significantly increases breakage safety against overload, doubles the service life, and allows the device to handle loads up to 150% higher than previous devices, reducing operating costs and improving process resilience.
Implementation Method 1
the rotating element is mounted elastically in a damping device via the bearing journal, and that the damping device is designed in such a way that it allows an elastic evasive movement of the rotating element
Implementation Method 2
the rotating element is mounted elastically in a damping device via the bearing journal
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a device (1) for separating material to be fed (2), in particular recycling material, construction rubble and/or waste material, preferably intended for use in a quarry, having at least one rotation element (3), in particular in the form of a screw shaft, wherein the rotation element (3) has a core tube (4) and an, in particular, at least substantially cylindrical bearing journal (5) which is connected to the core tube (4). According to the invention, the rotation element (3) is elastically supported in a damping device (6) via the bearing journal (5).