Shaft wear is a common problem in the management of production equipment in enterprises. For a long time, it is difficult for enterprises to repair the wear of large shafts by traditional methods. Many enterprises often deal with this problem by replacing spare parts. The disassembly of spare parts is only high cost, heavy weight and a large number of spare parts in stock, which brings great pressure and intangible economic losses to the cash flow of enterprises. The carbon nano-polymer technology introduced by Suolei Industry is not popularized, which provides a brand-new solution for enterprise equipment managers in the aspect of large-scale shaft wear, which can repair large-scale shaft wear on site, greatly saving the disassembly and transportation time and a lot of maintenance costs of enterprises.

In addition, some enterprises use repair welding technology to repair, which easily leads to thermal stress and shaft fracture. The carbon nano-polymer repairing material of the invention has good comprehensive mechanical properties and plasticity, rigidity and excellent yield, and is simple to operate. It can repair the problems of bearing position wear and bearing cavity wear in a short time, shorten the downtime of enterprises and reduce personal workload.

Comparison of repair technologies for large shaft wear

The traditional processing method of repair welding machine is easy to cause material damage and lead to deformation or fracture of parts, which has great limitations; The methods of brush plating and spray reprocessing often need external cooperation, which only requires a long repair cycle and high cost, and because the repaired materials are still metal materials, the causes of wear (poor impact resistance and metal concession) can be fundamentally solved; Many parts can only be scrapped and replaced, which greatly increases the production cost and spare parts inventory, and makes the enterprise's good resource advantage idle and wasted.

The repair technology of sore carbon nano-polymer is a mature and cost-effective metal repair and maintenance scheme. The main characteristics of this technology are short time, low cost and good effect. Soleil carbon nano-polymer technology is a high-performance epoxy two-component composite reinforced by nano-inorganic materials and carbon nanotubes. The biggest advantage of this material is that it is bonded with special nano-inorganic materials, and it does not contain epoxy cyclic molecular oxygen, which improves the bonding force between molecules, thus greatly improving the comprehensive properties of the material, and can be well bonded with various materials such as metal, concrete, glass, plastic and rubber. It has good high temperature resistance and chemical corrosion resistance. At the same time, good machinability and wear resistance can serve the wear and repair of metal parts.

Repair technology of large shaft wear

1, equipment size, speed, and wear factors, and select the corresponding "machining", "tooling" and "scraping" repair processes.

2. Make preparations before construction, such as tools and materials.

3. Surface degreasing.

4. Rough surface treatment.

5. Mix SD7 10 1H carbon nano-repair materials in strict proportion, and fully mix until the color is even and consistent without chromatic aberration.

6. Fill the material according to the wear and restore the size according to the selected "repair process".

7. Sufficient curing time. The specific curing time shall be based on the site temperature and refer to the material technical data sheet. On-site repair case of large shaft wear

In July of 20 15, the bearing parts of the roller press in the enterprise were worn, which led to the suspension of production. Details are as follows:

Equipment specific parameters: Zhong Chao roller press, model 120-60, journal 480mm, cone 1: 12, bearing model 23296CAK/w33, and shaft wear size 2-3mm.

From 2065438 to June 2005, the roller press HFCG 160- 140 of Hefei Institute of Cement Clinker Grinding Line was seriously worn, which led to the shutdown. The specific data are as follows:

Equipment parameters of roller press: Hefei Institute HFCG 160- 140, bearing model 232/750CAKF 1/W33C3, journal 750mm-

790mm, 1: 12 cone, bearing wear of fixed roller and movable roller on conveying side is 1-2mm and 3-4mm respectively, and bearing wear of fixed roller on supporting side is 2-3 mm. ..