VSI Crusher Slide Plate Angle Optimization
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Solution Overview
Problem
Vertical shaft impact crushers face inefficiencies and maintenance issues due to problems in feeding the second material flow, leading to reduced crushing efficiency and increased maintenance needs, particularly when processing materials with flaky or wet consistency and large or needle-like objects.
Innovation Solution
A vertical shaft impact crusher design where the second material flow is fed to slide over a wear-resistant, low-friction slide plate at an adjustable angle of 35-70°, ensuring efficient introduction into the path of the accelerated first flow, preventing material pileup and outlet blocking, and allowing for adjustable open area outlets to optimize material flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the second material flow is fed directly into the path of the accelerated first flow without a slide plate, then the structure is simpler, but material piles up at the outlet and blocking occurs
Solution Approach 1:
A slide plate is introduced as an intermediary component between the second material flow outlet and the crushing zone. The slide plate directs the second material flow at an angle of 35-70° relative to the horizontal plane, preventing material pileup and ensuring efficient introduction into the path of the accelerated first flow, thereby resolving the contradiction between structural simplicity and crushing efficiency
2Speed
If the slide plate angle is set to less than 35°, then material flow speed is reduced, but material piles up on the slide plate itself
Solution Approach 1:
The angle of the slide plate is optimized to a specific range of 35-70° relative to the horizontal plane. This parameter change ensures that the second material flow achieves sufficient speed to prevent pileup while maintaining efficient introduction into the crushing zone. The optimal angle balance prevents both material accumulation on the slide plate and ineffective crushing
3Speed
If the slide plate angle is set to more than 70°, then material flow speed increases, but the tangential component is reduced and crushing efficiency decreases
Solution Approach 1:
The slide plate angle is precisely controlled within the range of 35-70° to optimize the balance between material flow speed and tangential component. This parameter optimization ensures that the second material flow maintains sufficient speed to prevent pileup while preserving enough tangential component for effective introduction into the path of the accelerated first flow, thereby maximizing crushing efficiency
4Device complexity
If the outlet open area is fixed, then the device is simpler, but the amount of second material flow cannot be varied
Solution Approach 1:
The outlet open area is made adjustable through a movable partition wall that can be positioned at different locations. This dynamic adjustment capability allows the amount of second material flow to be varied according to different material properties and crushing requirements, providing adaptability while maintaining relatively simple structure
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 enhances crushing efficiency by maintaining a high-speed, even flow of the second material, reducing material pileup and wear on the slide plate, and allowing for adjustments based on material properties to prevent sticking and improve processing of various materials.
Implementation Method 1
said slide plate is provided with a wear resistant coating on that surface on which said second flow of material is operative to slide. The wear resistant coating increases the life of the slide plate. More preferably the wear resistant coating has a low coefficient of friction, to further increase the speed at which the second flow of material slides over the slide plate.
Implementation Method 2
a rotor for accelerating a first flow of material to be crushed
Implementation Method 3
a housing comprising a circumferential impact wall section against which the accelerated first flow of material may be crushed
Implementation Method 4
a second feed means for feeding a second flow of material to be crushed into the path of the accelerated first flow of material
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A vertical shaft impact crusher comprises a rotor for accelerating a first flow of material to be crushed, a first feed means for feeding the first flow of material to the rotor, a housing against which the accelerated first flow of material may be crushed, and a second feed means for feeding a second flow of material to be crushed into the path of the accelerated first flow of material. The second feed means comprises an inner hopper (8) and an outer hopper (10). An outlet (14) is formed in said inner hopper (8) for allowing said second flow of material to enter a space (12) formed between said inner and outer hoppers (8, 10). A slide plate (36) is located in said space (12) adjacent to the outlet (14), the slide plate (36) being inclined in a direction being substantially tangential in relation to the rotor.