Bentonite Mill

Bentonite Mill

According to the failure of Bentonite Mill reducer damaged parts, our engineers decided to repair on-site, and can reduce maintenance costs, easy to supervise the quality of repair process. Removal and replacement of 16 M42-8.8 high strength bolts fractured, due to the original transmission torque 12 50mm cylindrical pin hole wear elliptical deformation, to improve the strength of cylindrical pins, drilling reaming, reaming cylindrical pins, grinding local broken teeth below the working meshing surface, output flange seal labyrinth deformation repair circle Avoid installing and running scraping card friction.

Maintenance plan for Bentonite Mill reducer

  • 1. Clean the parts, install the concentricity between the planetary frame and the output flange of the Bentonite Mill reducer, measure and adjust the clearance between the two vertical stops, and the error is not more than 0.10mm. Then, eight M42 bolts are used to symmetrically hold the planetary frame and the output flange of the compact Bentonite Mill reducer, and there is no gap between the planetary frame and the output flange in principle. (Considering the slight deformation of the disassembly and assembly, the horizontal joint surface can be inspected with a 0.03 mm stopper gauge at a depth not exceeding 10 mm to be qualified).
  • 2, improve the size of the pin data. Because of the serious deformation of the original pin hole, the data size can not be repaired and guaranteed. At the same time, in order to improve the strength of the shearing cylinder pin, the drive pin was improved. The diameter of the pin hole was expanded from 50mm to 59mm, and then reamed to_60mm.
  • 3. Mark the drilled hole and reamed pin hole in order. The hardness of 40Cr grinding material is HB=300 and the grinding dimension of inner thread cylinder pin is 60H7/K6mm.
  • 4. Bentonite Mill reducer output flange seal labyrinth in the vertical lathe alignment, to ensure that each groove diameter size meets the installation requirements, the deformation of each groove spare part of the car off, to ensure that the Bentonite Mill reducer shell seal labyrinth combination does not occur interference friction.
  • 5. To ensure smooth assembly, all grinding cylindrical pins are placed in a refrigerator at - 10 C for cooling and contracting for 3 hours, and then assembled symmetrically according to the marks.
  • 6, mapping and manufacturing the inner support of the center cover of the planet carrier, and installing the copper block firmly.
  • 7. Under the condition of guaranteeing the meshing contact strength, grinding the three-stage inner gear ring, planetary gear and the outer gear of gear coupling with partial broken teeth, knocking down the cracked broken teeth, preventing the other parts from being damaged after installation and running again, and grinding the rest of the broken teeth below the working contact surface so as to prevent them from being damaged in operation. Force damages other tooth surfaces.
  • 8. Clean and scrape the scratch marks on the working face of the planetary frame journal bearing with a scraper to achieve the precision required by the drawing contact technology; check that the parts of the thrust pad are not harmed, clean and lubricate the oil supply hole with compressed air to keep the smooth.
  • 9. Clean the gears and bearings inside the Bentonite Mill reducer with a high-pressure cleaner and check the clearance and appearance of wear, make a good record, and continue to use the bearings that meet the technical requirements after cleaning.
  • 10, improve connection bolt type and loosening prevention measures. The bolt tightening and anti-loosening measures must be checked after assembling the parts. The output flange of the Bentonite Mill reducer is connected with the planetary frame bolt (the original bolt hexagonal head has two 8mm steel wire anti-loosening holes crossed. From the section of the broken bolt head, this hole weakens the bolt strength, this time the hexagonal head of the bolt is not in a string. After tightening, it is better to adopt 10mm steel bar to form a circle and fix it by welding. The connection bolts of the output flange of the mill disk and the Bentonite Mill reducer are also welded and fixed in a circle with steel bars to prevent loosening.
  • 11. After the Bentonite Mill reducer is installed in place, after 8 hours of no-load operation, all kinds of operating parameters are normal, and after 24 hours of gradual loading operation, the anchor bolts of the Bentonite Mill reducer are again anti-tightening.