Influence of manufacturing and assembly accuracy of Spreader Parts
1. The manufacturing and assembly accuracy of parts is low, which will affect the gravel distribution accuracy. Because the hopper, distribution drum and distribution plate of the gravel spreader are mostly made of thin steel plate after cutting, bending and other processes, the welding deformation is large and the manufacturing and assembly accuracy is low. When the roundness or cylindricity error of the distribution drum is too large, it will lead to uneven distribution of crushed stones; When the position error of welding material threshold block is too large, the opening of each material door will be inconsistent, resulting in uneven distribution of gravel; When the axis of the distribution drum is not parallel to the lower edge of the blanking opening, the gravel accumulation along the axis will be different. When the distribution drum rotates, the gravel flow under the belt will also be different, resulting in uneven gravel distribution and affecting the gravel distribution accuracy.
2. The smoothness of the surface of the spreader through which the gravel flows will also affect the gravel distribution accuracy. When the surface of the hopper bottom plate is not smooth, the randomness of gravel flow will increase, the distribution amount will fluctuate, and the uneven distribution of gravel may also be caused.
3. The surface of the guide chute shall be free of raised welds, bosses, grooves, etc., and all splices and bends shall be smooth. Otherwise, it is easy to block the flow of gravel, and the poor flow of gravel will affect the distribution accuracy.
The influence of physical properties, particle size and bouncing condition of crushed stone on the pavement
When the physical properties of crushed stone vary greatly and the particle size is uneven, the amount of crushed stone falling from each material gate is different; At the same time, the gravel will bounce up after falling to the ground, forming gravel splash, resulting in poor gravel distribution uniformity; And so on, will affect the distribution accuracy, but its influence is far less significant than that of the previous factors.
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