Article No. 1003 month conveyor belt drive roller often appears loose and retracted in the operation of the conveyor. Some drums are used less than half a month after replacement, the bolts will loosen and retreat, seriously affecting production, in human resources and financial resources. Caused a lot of waste for this question. After many on-site measurements, the technician checked the size of the paper 4 and finally found the original flash of the bolt loosening and retreating, and developed a treatment method. The modified drum did not show loosening and retreating of the bolt during operation.

1 Drive roller bolt loosening and uncut reason analysis Drive roller structure such as the cabinet 1.1 transmission roller shaft welcoming the flat key and the hub into a body, the hub is connected with the rolling plate by bolts, thus assembling into a unitary roller. By measuring the dimensions of the various sections of the drum, it was found that the main reason for the looseness of the bolt was the change in size between the hole in the drum web and the shaft on the hub to which it was fitted.

According to the paper size, the clearance between the hole on the web and the hub is 6 1. The actual gap is 13 is fully explained.

The holes in the web are ground and the drum is not concentric with the shaft. During the operation of the hub sill, Zhou Fangfa is relatively remote, connecting the web and the hub to move outward, and when retreating to a certain extent, the individual bolts are first sheared. Finally, after the bolts are all cut, a string is generated. The drum is damaged and the belt conveyor is completely stopped.

2 processing method The first processing method ratio. When repairing the roller, firstly align the roller shaft on the lathe, make the roller shaft concentric, and try to ensure the matching gap between the plate hole and the wheel of the paper. However, the following measures are taken to prevent the snail from loosening 0. Two positioning ridges are assembled on the web and the hub 12. Its function is to ensure the positioning during assembly, which is to limit the relative movement of the web and the hub during the operation. Three positioning keys are welded in the direction of the web in the direction of 120, and three keyways are milled at corresponding positions on the hub. The key cooperates with the keyway on the hub to ensure that the matching clearance does not change, so that the hub and the web no longer have relative motion; the original coupling bolt is changed from PCT 24 to PCT 30 to increase the bolt strength.

The second method is to weld the hub and the web plate into a gap on the lathe with the rolling plate hub and the gap, and to avoid relative movement between the hub and the web. In order to avoid secondary scrapping of the drum, the drum shaft can be pressed out, and it is easy to reassemble, and the drum shaft can be modified. 1 Since the hub is welded to the web, it is impossible to reproduce the shaft in the axial direction. Therefore, the drum shaft is The shoulders are all gone, so that the roller shaft is pressed out and loaded 2 because the roller shaft and the hub are connected by a key, the hub light. Dead assembly is more difficult. Therefore, the first end of the wheel hub is welded to the shaft, and then the other end of the wheel is welded.

The above two treatment methods have many processing steps, and the latter is difficult to assemble, and the keys and the key grooves are not easily aligned. Go to page 9 Jiaozuo Mining Institute, now engaged in electromechanical management.

5 As the load increases and the power consumption time increases, the proportion of variable loss in the total loss becomes more and more nine, and the proportion of the loss is smaller and smaller. The above analysis is performed, when the load is an arbitrary value. According to Equation 1, the ratio of constant loss to total loss can be obtained. That is, the thickness of the heart is thicker. The type of (2) is replaced by the heart and the damage is reduced. Under the total load, the loss rate and economic load are known. The economic loss rate is related to the ratio 2 of the total loss of non-cargo loss. It is considered that the vertical axis draws its curve 2, and the distribution is economically in the range where the loss rate does not exceed the economic loss rate of 10, that is, the economic operation zone of the distribution. Within 65 households wide 1.53.

2 The choice of distribution capacity is analyzed by analysis. The economic operation area of ​​the distribution is based on the operating conditions in the day, so y, ri5PpS, 5.S, 5, the minimum apparent power, for convenience, 1 List 3 series power transformer economic operation area load kW, for example, a factory calculation load 5 = 480 political shift production.

3 Conclusion This choice enables the selected distribution to operate within the economic operating zone and is closest to the apparent power of the calculated load, enabling the company to edit Lin Chunfeng with minimum responsibility. For a longer period of time, 1 can save 2 drums, each drum 120,000 yuan, can save 240,000 yuan, which does not include the loss caused by the replacement of the drum, and the cost of working materials for replacing the drum. The whole mine uses a total of 12 belt conveyors. Each year, only the drum reconstruction project can save about 288,000 children. The responsibility is compiled. Lin Chunfeng is connected to the 25th page. 3 Economic Benefit Analysis After the restructuring, the rolling rafts are respectively loaded into the rice dumplings. After the lane and the 18041 lane, the effect was good and no problems occurred. After the drum is improved, the drive roller is at least 1; 1 even

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