Vibrating Screen Mechanical Vibrator Removable Bearing Case
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Solution Overview
Problem
Existing mechanical vibrators for vibrating screens, with two or three shafts mounted through opposing sidewalls, complicate maintenance due to their structural integration within the screen, leading to time-consuming and costly disassembly and assembly processes, especially in polluted environments, and result in heavier, more expensive equipment.
Innovation Solution
A mechanical vibrator design featuring two transversal shafts with eccentric weights, supported by a removable bearing case mounted on transversal beams, allowing easy assembly and disassembly, and eliminating the need for sidewall fixation, enabling quick maintenance and replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If mechanical vibrator is mounted through sidewalls of vibrating screen, then structural integration is achieved, but maintenance complexity increases and disassembly time increases
Solution Approach 1:
The mechanical vibrator is divided into separate modular components: bearing cases that can be independently removed from the sidewalls, shafts, and eccentric weights. This segmentation allows maintenance personnel to access and service individual components without disassembling the entire vibrating screen structure, directly resolving the contradiction between structural integration and maintenance ease.
Solution Approach 2:
The bearing cases are extracted as removable components from the fixed sidewall structure. By taking out the bearing cases, the shafts and eccentric weights become accessible for maintenance while the sidewalls remain intact. This extraction principle enables easy maintenance while preserving the overall structural integrity of the vibrating screen.
2Shape
If three shafts are used to produce elliptical movement, then desired elliptical movement is achieved, but device weight increases and cost increases
Solution Approach 1:
Instead of using three shafts with symmetric arrangement, the invention employs two shafts with asymmetric eccentric weight configurations. The eccentric weights are positioned at different radial distances from the shaft centers, creating the necessary elliptical movement pattern. This asymmetric approach achieves the same functional result with fewer components, reducing weight and cost.
Solution Approach 2:
The functions of three separate shafts are merged into two shafts by strategically positioning eccentric weights on the shafts. The eccentric weights work in combination to produce the elliptical movement that would otherwise require three shafts, thereby reducing the number of components and the overall weight of the vibrator assembly.
3Reliability
If more gears are used to synchronize shafts, then shaft synchronization is achieved, but device complexity increases and cost increases
Solution Approach 1:
Instead of using complex gear trains to synchronize three shafts, the invention uses two shafts with eccentric weights that replicate the synchronized motion pattern. The eccentric weights are positioned and dimensioned to create the same elliptical movement effect as three synchronized shafts would produce, eliminating the need for complex gear synchronization mechanisms.
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 simplifies maintenance, reduces equipment weight and cost, and maintains efficient elliptical movement of the screen deck, ensuring constant bulk material flow while minimizing operational interruptions.
Implementation Method 1
Each end portion of each shaft carries at least one eccentric weight, the shafts being rotated in opposite directions and with the same frequency and in determined phases, which define the inclination of the direction of reciprocating linear movement
Implementation Method 2
The vibratory movement imparted to the vibrating screen and to its separation screen deck is intended to cause the bulk material to be moved over the screen deck and also an upward thrust to the translational material to prevent that a particle, not passing through a hole in the screen deck, remains permanently stuck in a screen hole
Data Source
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AI summary
The vibrating screen (PV) have a screen deck (11), two sidewalls (12) and a mechanical vibrator (VM) comprising two shafts (20), rotating at the same rotation and in opposite directions, each one of the end portions (20a) of each shaft (20) carrying an eccentric weight (30) and being supported on bearings (21) which are supported in the sidewalls (12) of the vibrating screen (PV). The shafts (20) have their end portions (20a), adjacent to each other, supported on bearings (40) mounted to a same bearing case (50) fixed to beams (13), transversal and having opposite ends fixed to the sidewalls (12) of the vibrating screen (PV). Each end portion (20a) of a shaft (20) carries an eccentric weight (30) with a total mass different from that one of the eccentric weights (30) of the end portions of the other shaft (20), said shafts (20) rotating in determined phases, defining the inclination of the major axis of an elliptical movement imparted to the screen deck (11).