Roots vacuum pump manufacturers found that the common faults of Roots pumps are mainly divided into the following two categories:

　　Bearing position wear: The wear of transmission parts is a common problem in Roots pumps, and the number is large and the damage is frequent, including bearing positions, bearing seats, bearing chambers, keyways and threads. The traditional processing method of repair welding machine is easy to cause material damage, resulting in deformation or fracture of parts, which has great limitations; the methods of brush plating and spraying and re-machining often require outsourcing, which not only has a long repair cycle and high cost, but also has large repair costs. The material is still a metal material, which cannot fundamentally solve the cause of wear.

　　Roots vacuum pump manufacturers found that the latest method is to use polymer composite materials, which have super adhesion, excellent compressive strength, wear resistance and corrosion resistance and other comprehensive properties.

　　Roots vacuum pump manufacturers consider the repair steps:

　　1. Mold processing: make standard split molds. 2. Surface treatment: degreasing, grinding and cleaning to ensure that the surface is clean, dry and firm. 3. Harmonizing materials: the proportion is accurate and the harmony is uniform. 4. Roots vacuum pump manufacturers Coating material: ensure bonding, filling and thickness. 5. Install the mold: apply mold release agent, install and fix it, and ensure that the excess material is extruded. 6. Demoulding: After curing, disassemble the mold to clean up the excess material. The material can not be knocked. It can be removed by tools such as a grinder and a file to meet the installation requirements.