Because the chain scraper conveyor is very stable and reliable in material transportation, it has the advantages of long conveying distance and centralized control of automatic operation. As one of the main types, the chain scraper conveyor has complicated working conditions when conveying materials. During operation, the positive and negative powers of the motors are staggered, which places high requirements on the installation, design and operation of the entire conveying equipment. Especially for belt conveyors with large inclination angles (downward slope greater than 18 degrees and use of smooth belts), the design is more difficult, and problems such as motor out of control and material slippage are prone to occur. To this end, our company's technology provides some practical ideas for the design of chain scraper conveyors, and provides design examples of relevant conveyor components, and discusses with colleagues.
When designing a scraper chain conveyor, it is necessary to know the working environment and physical characteristics of the material to be transported. The point-by-point calculation and power calculation of the bandwidth and tension of the belt conveyor must be known in advance. Not only that, it also includes the calculation of the cassette, the vertical calculation and the weight calculation of the truck tensioner. In addition, in the design and calculation of the reducer, it is also necessary to know the motion parameters and dynamic parameters, such as calculating the rotation speed of each shaft, calculating the shaft power of each shaft and the torque of each shaft. The calculation of the driven shaft is divided into the material of the shaft, the small diameter calculated according to the torsion strength, the structural design of the shaft, the diameter and length of each part of the shaft, and the length of each shaft.
When determining the structure design of the scraper chain conveyor shaft, it is necessary to make sure that the components on the chain scraper conveyor shaft are arranged in the center of the box, the bearings are arranged symmetrically on both sides, and the shaft is installed on the outer shaft end with couplings, teeth Ring and sleeve. The shaft is positioned and fixed by flat key connection and interference fit H7/r6 for fixation. In order to facilitate assembly, disassembly and adjustment, the shaft is usually designed as a stepped shaft. According to the principle of determining the diameter of each part of the shaft, the size of the stepped shaft is determined in the order from small to large and from both ends to the center. The diameter of the seal and rolling bearing should be the same as the inner diameter of the seal and bearing. The bearings of the two upper fulcrums on the shaft of the scraper chain conveyor should be as the same as possible to facilitate the processing of the bearing seat hole.
