The diameter of the screw conveyor determines the size of the conveying volume
In order to improve the conveying efficiency of the screw loading conveyor, we decided to make a great improvement in the design structure of the screw conveyor. Through the application in different industries and accumulated a lot of practical experience, the specific methods are also different. To improve the conveying efficiency of the screw loading conveyor and reduce the maintenance workload, the key is to adapt its structure to the requirements of low-speed full-load operation.
This is to replace the stirring material conveying method with the pushing material conveying method, which can not only improve the material conveying capacity, but also reduce the energy consumption per ton of material conveying , reduce business operating costs.
Take the screw conveyor as an example, the common structure of the screw conveyor is to use the motor + reducer + intermediate section to adopt the structure of the hanging bearing, which is For screw conveyors with long conveying distances. Agricultural screw conveyors are of a light-duty structure, and this screw conveyor is only used for a relatively short period of time, about 4--6 weeks per year.
Generally, its working load is only 15-30% of full load, but its running speed is very high. Its spiral blades are mostly made of flat steel strips, or the drawn spiral blades are installed into the continuous spiral grooves of the spiral tube shaft by the rolling method. The industrial screw conveyor is required to operate at full load and low speed, and the distance between the suspension supports is large. It is best to cancel all the suspension supports in order to improve the conveying capacity of the screw conveyor and reduce the maintenance amount. Experiments show that the maintenance focus of the screw conveyor is the suspension support. Our purpose is to improve the conveying efficiency of screw conveyors.
Therefore, we must understand the factors that affect the conveying efficiency of the screw conveyor:
1, The properties of the conveyed materials, such as abrasiveness, etc., must be considered in the design. Conveying abrasive materials, such as bauxite, quartz stone or limestone, to screw conveyors equipped with suspended supports. Convey non-abrasive materials such as chaff and baking soda. The material characteristics become the key factor affecting the conveying capacity. The viscosity and water content of the material determine the difference in the conveying method of the material.
2. The running speed of the screw loading conveyor also determines the size of the conveying amount. The operating speed of the screw conveyor is related to the particle size of the conveyed material, and the particle size of the material affects the slippage, impact and abrasion. The higher the number of revolutions, the greater the slippage of the material. However, the increase in the number of revolutions will cause the material to rotate with the rotation of the screw, which is an undesired material movement. In addition, the increase of the speed will also produce serious material impact, which will accelerate the serious wear of the spiral blade and one side of the groove body.
3. The diameter of the screw conveyor also determines the size of the conveying volume. For trough screw conveyors, it is the width of the conveyor trough. The key to using a long-distance screw conveyor with a large diameter pipe shaft is the use of a large diameter pipe shaft, which can not only improve the torsional strength of the pipe shaft, but also greatly reduce the bending degree of the pipe shaft. This helps to reduce the number or no of the suspension mounts, thereby reducing the manufacturing cost.
4. The size of the motor power also determines the conveying capacity of the screw conveyor. If the power of the motor selected is too small, the running speed of the material in the tube or the groove will be too slow, which will seriously affect the conveying efficiency, and the motor may be burned due to excessive load. On the contrary, if the motor power is too large, it will increase the power consumption and increase the production cost of the enterprise.
From this, we can know that to improve the conveying efficiency of the screw conveyor, firstly, the conveyor should be fully loaded; The body or pipe diameter should be larger to be able to fill more materials; thirdly, the motor power should be selected appropriately to support full-load operation; finally, the operating speed of the screw conveyor should be high, in order to transport more materials per unit time. Therefore, when designing a screw conveyor, it is necessary to have a certain understanding of the material characteristics. And to meet some requirements put forward by users, it is necessary to fully consider the above factors, including the selection of some components, and related technical requirements.
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