This paper mainly analyzes the causes of apron feeder bearing wear and common repair processes, and analyzes how online repair technology uses polymer metal repair materials to solve the wear repair of plate feeder bearing position on site. Its biggest advantage is that it can realize on-site repair, with high repair efficiency and less manpower and material resources. The service life after repair even exceeds that of new parts.
A, plate feeder equipment introduction
Apron feeder (apron feeder) is a type of continuous material conveying machine, used in the horizontal or inclined direction of the crusher, conveyor or other working machinery to distribute and run the material continuously and evenly. It is suitable for loose, block and large quantity feeding process in large and medium-sized cement production line, and can work reliably in high temperature and high humidity and harsh environment, especially for transporting large, high temperature and sharp materials, and can work in open air and wet and harsh environment.
Second, apron feeder common failure phenomenon and cause analysis
1. Because runs with high load for a long time, metal fatigue will occur in the bearing position, which will affect the safe operation of the equipment.
2, Operation torque is very large, so in the design of the bearing position is generally used with the discharge sleeve, when the gap between the discharge sleeve and the shaft error, with a long time of use, will inevitably lead to the liking of the bearing, and then aggravate the bearing wear.
3, Because the bearing is installed on the release sleeve, the axial force positioning is mainly by the front end of the reducer against the spacing sleeve positioning, when the reducer appears to move, it affects the stability of the bearing fixed, resulting in axial movement, and then bearing wear. Three bearing wear of several repair methods
1, The advantages of brush plating process are that it can achieve online repair, but the disadvantages are also very obvious. The brush coating is limited by the amount of wear, and the brush thickness of the general brush coating is less than 0,2m. When the wear amount is greater than 0.2m, the brushing efficiency will be doubled down, and when the brushing layer is too thick, the brush coating is easy to fall off during use, and the service life is short.
2, The repair welding machine repair process is the most common way in the traditional process repair process, which is characterized by high repair accuracy. Its disadvantage is that it is easy to cause stress concentration or bending deformation of shaft in the repair process of small shaft. For the repair of large shafts such as apron feeder, online repair cannot be carried out. Disassembly and transportation will increase the repair cost and repair cycle, and the requirements for machining equipment are extremely high, and the comprehensive cost performance is low, which will affect the normal production of enterprises and increase the maintenance cost. At the same time, the repair welding process cannot avoid the problem of thermal stress, resulting in the risk of cracks or even fractures during the use of the shaft, increasing the production safety potential.
3, Replacement of new parts for the wear of apron feeder, the use of replacement parts is not only high cost, but also the supply cycle and disassembly cloud transport are relatively high, less than a last choice enterprise generally do not adopt.
4. On-site repair of polymer composite materials