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Understand the function knowledge of roller parts
16,Dec,2019Visits: 2

  Idler is an important part of belt conveyor, which has many kinds and large quantity. It accounts for 35% of the total cost of the belt conveyor and produces more than 70% resistance. Therefore, the quality of idler is particularly important.

  

  The function of idler is to support the weight of conveyor belt and material. The operation of idler must be flexible and reliable. Reducing the friction between conveyor belt and supporting roller plays a key role in the service life of conveyor belt, which accounts for more than 25% of the total cost of conveyor belt. Idler is a small part of belt conveyor, its structure is not complex, but it is not easy to produce high quality idler.

  

  There are several criteria to judge the quality of supporting roller: radial runout of supporting roller; flexibility of supporting roller; axial displacement.

  

  Basic types of idlers

  

  Idler is an important part of belt conveyor, which has many kinds and large quantity. The function is to support the belt, reduce the running resistance of the belt, and make the verticality of the belt not exceed a certain limit to ensure the smooth running of the belt.

  

  Roller can be divided into centering roller, buffer roller, groove roller and parallel roller according to its application. The function of the adjusting roller is to correct the deviation of the belt conveyor. In general, the center roller of the rotary groove is installed in the heavy-duty section of the conveyor, and the parallel center roller is installed in the no-load section. The tailstock adopts buffer roller according to the actual situation. When receiving materials, it can reduce the impact of materials on the belt, which is conducive to the service life of the belt along the long belt. Slot type idler generally consists of two side idler and flat idler. The groove angle is generally 30 degrees. For the transportable belt conveyor, the three idlers of the trough type idlers are hinged to each other, which is called the articulated idlers. The parallel idler is generally a long roller, which is installed at the lower end of the pressure, so it is called the lower idler.

  

  Roller in the material is divided into steel and plastic roller two kinds. There are three kinds of bearing blocks for idler, i.e. cast iron bearing block, steel plate bearing block and phenolic plastic bearing block.

  

  The seal of idler includes steel and plastic. Their seals are internally filled with grease. The quality of idler directly affects the power consumption of belt conveyor and the life of belt. Therefore, reliable dust-proof seal and good lubrication are important use standards.

  

  Idler accounts for 35% of the total cost of belt conveyor, and the resistance is more than 70%. Therefore, the quality of idler is particularly important.