The rotary unloader is a dosing device specially designed for grinding raw materials in cement plants and as a trap air feeding device in positive or negative pressure conveying systems. Affected by the environmental medium, the slewing unloader shaft wear problem often occurs, so how to repair it in time?
First, let's take a look at the structural characteristics of the rotary unloader:
The rotary unloader is equipped with a hot air channel, when the feeding humidity is large, the bottom of the impeller may be stuck with a certain thickness of powdery material, then it should be through this higher temperature gas, so that the bottom of the material dry, not easy to bond to the bottom of the impeller, will not affect the amount of feed, when not used to blindly die in and out of the air outlet. Feeders above φ1800mm open one or two open inspection doors on one side of the housing, which may be opened if necessary to check the internal conditions and replace the anti-wear layer on this surface, as well as the anti-wear layer on the impeller. And with inspection holes, usually when debris enters the impeller or the occurrence of blockage and other accidents affecting the normal operation of the feeder, you can open the maintenance door for cleaning, or observe its specific conditions, you can also observe the feeding situation, the equipment bucket capacity is generally between 30-50%, can not be too much feeding, feeding situation and through the equipment leaf rotation speed to control. The faster the speed, the less the feed per bucket, the slower the speed, the more feed per bucket, the control can not be greater than 30-50%, and the bucket feed is greater than 50% is prone to jamming, so that the drive device is damaged. Pay attention to the direction of impeller rotation, to rotate in the direction marked can not be fed in the opposite direction, otherwise there will be jamming, impeller overload or impeller abnormality, need to install motor protection device, the end of the shaft should be equipped with a proximity switch, through the impeller rotation situation to send a signal, the operation of the impeller feeder monitoring.
Second, the rotary unloader shaft wear solution:
For wearing parts, such as bearings, general maintenance is relatively simple, directly using the replacement method for maintenance, disassembly is relatively simple, the maintenance cycle is short to achieve online repair, and the traditional maintenance method can be effectively solved. However, for the important components of the rotary unloader equipment, that is, the shaft wear traditional process is relatively difficult to solve, requiring a lot of disassembly, investing a lot of manpower and material resources and production time, etc., which has a serious impact on the production of enterprises.
The repair technology of Sorley Industrial Carbon Nanopolymer Materials uses the unique mechanical properties and targeted repair process of carbon nanopolymer materials to repair problems such as shaft wear of the rotary unloader online.
The repair process is simple: (1) according to the size of the spindle, with the processing of the corresponding repair tooling; (2) the use of tooling and carbon nano-polymer materials on site to restore the size of the shaft (3) the installation of the corresponding components, start-up operation.
Its advantages are that the material has good adhesion, good compressive properties and comprehensive mechanical properties such as elastic deformation of the metal to achieve online repair, high repair efficiency, no need to disassemble a large number of equipment, generally within 12 hours to complete the repair.
Third, on-site repair application cases:
