Belt conveyor is the main equipment for coal transportation, which plays an important role in coal production. As a part of belt conveyor driving belt, drum has an important impact on the operation stability of belt conveyor. With the improvement of coal mining efficiency, the conveying performance of belt conveyor is also developing towards the direction of large-scale, which puts forward higher requirements for the operation of rolling Jane. Due to the long service life of belt conveyor in the process of coal conveying, the drum is easy to wear and failure in the actual production process, which has a certain impact on the coal conveying production. High performance and wear-resistant drum is the key research and development direction. Analyzing the drum wear and taking corresponding measures to control the drum wear is of great significance to avoid the occurrence of drum failure and ensure the stable operation of belt conveyor.
1 Analysis of rubber surface wear of drum
As a driving and braking component, the outer shell of the drum will also produce certain wear in the contact process with the conveyor belt. It is often coated on the outer surface to avoid the wear of the drum. In the actual use process, the outer coating also has wear. The abrasion of the rubber surface is easy to cause the damage of the belt conveyor or the deviation of the conveyor belt, which is not conducive to the transportation of coal. The main cause of rubber surface wear is the sliding between the roller and the conveyor belt, resulting in wear.
There are many factors causing sliding during the use of the drum, including the tension of the conveyor belt, the sliding angle of the drum and the structural form of the conveyor belt Friction coefficient, these different factors act on the rubber surface on the outside of the drum, making the drum slip and cause the wear of the rubber surface. In addition, in the process of coal transportation, when there are scattered coal particles between the conveyor belt and the drum, under the pressure of the conveyor belt, the particles will accelerate the wear of the rubber surface of the drum, and the particles are coated on the rubber surface of the drum, damaging the rubber surface of the drum, resulting in uneven wear of the rubber surface, reduced tensile strength and intensified wear of the rubber surface.
Avoid abrasion caused by particles on the rubber surface, and ensure that the drum is as closed as possible in use to reduce the adhesion of particles.
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2 Simulation analysis of rubber surface wear
In view of the factors affecting the roller slip, the simulation calculation is carried out by means of quantitative analysis. According to the model of a belt conveyor, the diameter of the roller is 200 mm, the friction coefficient is 0.3, and the tensile strength of the rubber surface of the roller is 2GPa.
2.1 Wear analysis caused by sliding angle
The sliding angle has an important influence on the wear of rubber surface. Set the state of the drum in MATLAB software, calculate the rubber surface wear under different sliding angles, and under the working condition of stable conveyor belt tension. In the process of gradually increasing the sliding angle, the wear of the rubber surface of the drum shows a linear growth trend, and the increase of the wear rate is almost the same in the process of changing the angle. Therefore, in the rubber surface wear, the sliding angle has a great influence, so it is necessary to control the sliding angle of the drum. In the process of use, when there is serious wear, the position of the drum can be adjusted according to the actual working conditions, so as to reduce the sliding angle and reduce the rubber surface wear of the drum.
2.2 Wear analysis caused by conveyor belt tension
Changing the sliding angle will have an impact on the tension of the conveyor belt. Increasing the tension of the conveyor belt is conducive to improving the traction and conveying capacity of the belt conveyor, but it will also increase the sliding Angle, which is not conducive to reducing the wear of the rubber surface of the roller. Therefore, the simulation analysis is conducted for the tension effect of the conveyor belt.
MATLAB software is used to set the state of the drum, and the rubber surface wear of the drum is analyzed under different tension. When the tension force is low, the roller wear is small, and when the tension force increases to a certain value, the roller wear increases exponentially. In the tensioning process of the drum, the optimal value of the conveyor belt tension force should be determined to avoid greater wear of the drum.
Because the sliding angle is related to the tension of the conveyor belt, in order to intuitively observe the influence of both on the rubber surface wear of the drum, the wear of the drum is simulated in the process of both changing at the same time. Between them, the tension of the conveyor belt has a great influence on the wear of the drum. Controlling the tension of the conveyor belt is the priority method to reduce the wear. The tension of the conveyor belt is generally adjusted by the tensioning drum. Therefore, the position of the tensioning drum has an important impact on reducing the wear of the rubber surface of the drum. Therefore, it is necessary to select the appropriate position of the tensioning drum.
2.3 Wear analysis of conveyor belt steel wire diameter
During the design of belt conveyor, the conveyor belt is selected according to the volume of transport, but in the process of use, the diameter of steel wire inside the conveyor belt has a great influence on the tensile strength of the conveyor belt. The diameter of the conveyor belt steel wire is different, and the pressure of the conveyor belt on the drum is different, which affects the rubber surface wear of the drum. Simulation analysis is carried out for the change of steel wire diameter of conveyor belt.
MATLAB software is used to set the working conditions of drum and conveyor belt. In the process of the change of steel wire diameter of the conveyor belt, the rubber surface wear of the drum shows a trend of rapid decrease. Larger steel wire diameter is beneficial to reduce the rubber surface wear of the drum, and when the steel wire diameter reaches a certain value, the wear effect on the drum is small. Therefore, in the process of conveyor belt design selection, we should choose a larger steel wire diameter, determine a reasonable conveyor belt strength, reduce the rubber surface wear of the roller.
In the process of using belt conveyor, due to the slip between the roller and the conveyor belt, it is easy to cause the rubber surface of the roller surface wear, causing the deviation of the belt conveyor operation, affecting the delivery of coal. MATLAB is used to simulate and analyze the factors of roller skid of belt conveyor. The results show that the sliding Angle, tension of conveyor belt and conveyor belt wire diameter for rubber roller surface wear has bigger effect, reduce the sliding Angle, conveyor belt conveyor belt tension and increase the wire diameter is helpful to decrease roller surface wear, slip Angle and the conveyor belt tension relate to each other, should be given priority to reduce the conveyor belt tension adjustment. By taking corresponding measures to control the rubber surface wear of the roller, the service life of the roller can be prolonged and the operation stability of the belt conveyor can be improved, so as to better transport coal.
China belt lacing tools manufacturer