Crusher Fixed Bit Positioning for Fine Grain Size
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Solution Overview
Problem
Existing crushers face limitations in achieving fine crushing of materials due to the mechanical layout, resulting in inefficient crushing efficiency and reduced grain size quality, as the support point and smashing point tend to be far apart, leading to rough crushing and longer processing times.
Innovation Solution
A crusher design incorporating a pressing feeder unit with a fixed bit positioned closer to the crushing rotor than the pressing roller, which acts as both a support point and a fixed bit to press the materials toward the feed conveyor side, enhancing the proximity of the support and smashing points and utilizing the bumping surface to facilitate finer crushing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the support point is positioned closer to the smashing point, then the target materials can be crushed into finer chips, but the mechanical layout becomes more complex due to the arrangement of the pressing roller and crushing rotor
Solution Approach 1:
The invention divides the crushing function into two separate components: a pressing roller that provides the support point and a fixed bit that provides the smashing point. This segmentation allows each component to be optimized independently for its specific function while maintaining the required proximity between support and smashing points, thereby achieving fine grain size quality without excessive mechanical layout complexity.
Solution Approach 2:
The fixed bit acts as an intermediary element between the pressing roller and the rotating crushing rotor. It is positioned at a specific location outward of the crushing rotor in the radial direction, serving as a stationary smashing surface that works in conjunction with the pressing roller to achieve fine crushing while simplifying the overall mechanical layout compared to moving the pressing roller closer to the rotor.
2Device complexity
If the support point and smashing point are located away from each other, then the mechanical layout is simplified, but the target materials cannot be finely crushed and require longer processing time
Solution Approach 1:
By segmenting the crushing function into pressing (support) and smashing operations performed by separate components positioned close to each other, the invention achieves fine crushing in a single pass through the crushing chamber. This eliminates the need for multiple crushing stages and reduces processing time, thereby improving productivity while maintaining simplified mechanical layout.
Solution Approach 2:
The pressing roller performs preliminary compression of the target materials before they reach the fixed bit for smashing. This preliminary action prepares the materials for more efficient crushing by the fixed bit, enabling finer grain size quality to be achieved in one pass rather than requiring multiple passes or longer processing times.
3Manufacturing precision
If the support point is positioned closer to the smashing point, then finer crushing is achieved, but the arrangement of the pressing roller and crushing rotor becomes more difficult
Solution Approach 1:
The fixed bit serves as a stationary intermediary component that is easier to manufacture and position than a移动的 pressing roller. It can be fixed to the crusher housing at the optimal position outward of the crushing rotor, providing the smashing surface without requiring complex adjustable mechanisms, thereby improving ease of manufacture while maintaining fine grain size quality.
Solution Approach 2:
Instead of moving the pressing roller closer to the crushing rotor to achieve fine crushing, the invention inverts the approach by keeping the pressing roller in its conventional position and adding a fixed bit as the smashing element. This inversion simplifies the mechanical layout and ease of manufacture while achieving the same fine crushing result.
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 allows for more effective crushing, producing smaller grain sizes with higher efficiency by bringing the support and smashing points closer, resulting in improved crushing efficiency and better grain size quality of the crushed materials.
Implementation Method 1
the crushing bit smashes against the target materials to be crushed from below
Implementation Method 2
a pressing roller for pressing the target materials to be crushed from above
Implementation Method 3
the fixed bit having a bumping surface, against which the target materials bump
Data Source
AI summary
A crusher comprises a crushing rotor being rotatable and having a crushing bit to crush target materials to be crushed, a feed conveyor for conveying the target materials toward the crushing rotor, and a pressing feeder unit including a pressing roller disposed above the feed conveyor and introducing the target materials on the feed conveyor toward the crushing rotor while pressing the target materials from above, and an anvil disposed at a position which is closer to the crushing rotor than a point where the pressing roller presses the target materials and which is outward of the crushing rotor in the radial direction. The fixed bit has a bumping surface, against which the target materials bump, disposed in an opposed relation to the rotating direction of the crushing bit, thereby crushing the target materials introduced toward the crushing rotor.