Under the impact of the ore, the bearing in the chain plate and supporting roller system of the heavy apron feeder for sale is often damaged, so that the heavy apron feeder for sale frequently fails. In this paper, the finite element analysis software is used to simulate the impact chain plate and the support mechanism (the force structure composed of channel steel and I-steel). It is known that the stress at the rigid support of the chain plate is great in the impact process. The deformation of the chain plate and supporting mechanism makes the original 5-point support become 2-point support at both ends, which intensifies the damage of the chain plate and roller bearing. Through the analysis of the impact characteristics of the chain plate supporting mechanism of heavy apron feeder for sale, it has a certain guiding role for the improvement of heavy apron feeder for sale.
apron feeder for sale is a kind of heavy equipment widely used in mine feeding. Its main function is to evenly feed the ore from the ore funnel to the belt conveyor. In the actual production work, the bearing in the chain plate and its supporting roller system is often damaged, so that the heavy apron feeder for sale frequently fails. Through long-term observation and analysis, it is found that there are two direct factors affecting the failure of heavy apron feeder for sale: first, if the chain plate is empty, the ore will directly impact the chain plate from 10m height, and the impact force is enough to deform or even fracture the chain plate and support roll: Second, under normal working conditions, the middle part of the lining plate of the chain plate and the supporting foundation of the idler will deform and sink after a period of work (impact), leading to the theory that there are 5 idlers supporting the chain plate in each row, but in fact, it is mainly the outside 2 work, which shortens the service life of the idler. The indirect factor is mainly the sense of responsibility of the operators. Experienced and responsible positions will always leave a certain thickness of ore on the surface of the chain plate for the next mine breaking, which can play a buffer role to a large extent, thus protecting the chain plate. In this paper, the impact of ore on the chain plate and the supporting mechanism (I-beam, channel steel) is analyzed and studied, which has a certain guiding role in improving the heavy apron feeder for sale.
The ore falls freely from the height and has an impact on the chain plate. The chain plate is supported by 5 supporting rolls, and the stress distribution of the chain plate after the impact will affect the stress status of each supporting roll. Therefore, the stress distribution of the chain plate after the impact of the ore on the chain plate should be analyzed. The ore in the whole process of transport in a height of 10m free fall, finally landed on the chain plate. Because the purpose of the analysis is to observe the stress distribution of the chain plate under the impact, the ore can be regarded as the rigid body and the rigid support roll as the rigid support. In addition, the motion of a free falling body with an altitude of 10m is equivalent to the motion of a vertical fall with an initial velocity of %. The whole impact model is simplified. In order to make the analysis more representative, the shape of the ore is set as a sphere with a diameter of d=350mm. Its size and weight are similar to the size and weight of the actual ore. In this way, the impact stress is relatively concentrated. In addition, the rigid support is the support roll, which is in line contact with the chain plate.
1) During the impact of ore on the chain plate, the stress at the rigid support of the chain plate is great, which will lead to the failure of the bearing of the support roll. The maximum stress occurs near the middle of the chain plate (impact point), and the stress value exceeds the tensile strength of high manganese steel, which will lead to the deformation and failure of the chain plate. 2) The deformation of the chain plate and the supporting mechanism will make the supporting rolls not at the same level, and the three supporting rolls in the middle will sink and cannot be supported normally. The bearing on both sides is stressed too much and often fails. 3) For the support mechanism, the maximum stress occurs at both ends of the support, and the maximum stress value exceeds the tensile strength of 45 steel, which further proves the fact that less than 5 backup rolls in actual work will aggravate the damage of gear train bearings. As the simplified model is adopted above, the stress distribution characteristics of the chain plate support mechanism are preliminarily analyzed. However, the chain plate support mechanism is also subject to other constraints in the actual working process, which will have an impact on its stress distribution, and also cause the stress generated in the simulation analysis to be many times greater than the allowable stress. In the actual work, the buffer can be realized by designing the intermediate buffer device and appropriately increasing the material thickness, as well as changing the work scheduling, so as to avoid the material falling directly from 10m height once the chain plate is empty, which will cause impact damage to the chain plate supporting mechanism of apron feeder for sale. In addition, rib plates can be added on both sides of the I-beam to improve the strength of the I-beam, and then improve its bending capacity. In order to prolong the service life of the I-beam in the process of the feeder, improve the work efficiency, reduce economic losses.
