External Unbalanced Screen Drive With Stationary Synchronization
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Solution Overview
Problem
Existing screen machine drives with unbalanced transmission gears require large space and have high 'dead' mass due to unnecessary components, limiting throughput capacity and increasing costs.
Innovation Solution
A drive system with a stationary motor and synchronous transmission connected to antiphase output shafts with unbalance elements, supported by bearing elements on cross members, eliminating internal synchronization gears and lubrication systems, and allowing modular adjustment of unbalance mass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If internal synchronization gears and lubrication systems are used in unbalanced transmission gears, then reliable synchronized operation is achieved, but device complexity and dead mass increase
Solution Approach 1:
The patent extracts and removes the internal synchronization gears and lubrication systems from the unbalanced transmission gear assembly. The synchronous transmission is separated into a stationary external unit, leaving only the unbalanced disks and their shafts within the screen body. This extraction eliminates the complex internal gearing while maintaining synchronized operation through the external transmission.
Solution Approach 2:
The patent introduces a stationary synchronous transmission unit as an intermediary between the drive motor and the unbalanced disks. This external transmission acts as a mediator that provides synchronized rotation to multiple unbalanced disks without requiring internal gears within each disk assembly. The intermediary transmission handles the synchronization function externally, simplifying the internal structure.
2Reliability
If internal synchronization gears and lubrication systems are included, then synchronized operation is ensured, but weight and space requirements increase
Solution Approach 1:
The patent extracts the heavy synchronization components (gears and lubrication systems) from the moving unbalanced modules and places them in a stationary external transmission unit. This extraction removes unnecessary dead mass from the oscillating parts while maintaining synchronized operation through the external transmission system.
3Speed
If unbalanced modules are arranged in axis parallel groups on cross members, then sufficient oscillation rate is achieved, but space consumption increases
Solution Approach 1:
The patent arranges unbalanced disks in a compact configuration where shafts are positioned both within and outside the screen body, utilizing three-dimensional space more efficiently. The shafts extend through the screen body thickness, allowing unbalanced disks to be positioned in multiple layers rather than only in planar arrangements, thereby achieving sufficient oscillation rate with reduced footprint.
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 reduces space and weight requirements, enabling higher throughput rates, cost savings, and adaptable unbalance mass configurations for various screen machine sizes, facilitating easier transportation and improved performance.
Implementation Method 1
connected to the output shaft by means of a rotationally rigid universally jointed shaft
Implementation Method 2
unbalance elements, and which is connected to the output shaft by means of a rotationally rigid universally jointed shaft
Implementation Method 3
each output shaft has a single associated horizontal shaft which has unbalance elements
Data Source
AI summary
A drive device is provided for a screening body of a screening machine, in particular for mineral materials for crushing, such as oil sand, with a drive motor, a synchronous transmission gear which is operatively connected thereto and has at least two output shafts which rotate in pairs in antiphase at the same rotation speed with respect to one another. The drive motor and the synchronous transmission gear are mounted in a stationary manner, separately from the screening body, at the side alongside the screening body, and do not oscillate therewith. Each output shaft has a single associated horizontal shaft which has unbalance elements, and which is connected to the output shaft by means of a rotationally rigid universally jointed shaft and is arranged with its axis parallel to the adjacent shaft and transversely with respect to the conveying direction of the screening body. The unbalance elements are arranged in the horizontal direction between the side walls of the screening body, the shaft is supported by bearing elements on a cross member which is connected to the side walls, the unbalance elements are arranged exclusively directly on the shafts, the bearing elements are arranged exclusively on the shafts in the axial direction of the shafts between the unbalance elements, and the bearing elements are supported on a cross member which is connected to the side walls.