The shaft of the paper machine dryer is worn, and the temperature is about 100 degrees, how to repai

The wear of the dryer shaft can be repaired according to the situation of the shaft, and the process is not the same, which can be roughly divided into two kinds: one is the tooling repair process, and the other is the standard model ruler process.

In 2016, Huatai Co., Ltd. **** a branch of the paper machine overhaul process, found a large number of paper machine dryer wear problems, if the traditional process repair needs to be removed dozens of dryers and transported to the outsourcing unit for repair welding machine processing, the repair cycle is relatively long, and the enterprise will invest a lot of manpower and material resources, which will greatly increase the maintenance cost of the enterprise, and have a serious impact on the entire maintenance plan.

In this context, the relevant person in charge of Huatai Co., Ltd. used Soray carbon nanopolymer materials to carry out the repair operation, and the technical personnel of Soray industry went to the enterprise to complete the repair of more than a dozen dryer bearings in only 36 hours, and the equipment was very stable in the later application process.

The on-site maintenance operation process is simple and convenient

Customized processing tooling according to equipment drawings.

The worn surface of the shaft is degreased and polished, revealing the original color of the metal.

I blend and paint Soray SD7104 material.

The tooling is fixed, and the tooling is disassembled and processed after the material is cured.

Hot-mounted bearings. <>

Dryer composite non-stick coating is a unique thermal spraying process of evergreen metal thermal spraying, since the innovation, after many times of actual preparation, the user response is very good, and now the process is very mature. After the completion of thermal spraying, the surface of the dryer is required to have good peeling and non-stickiness, excellent scratch resistance and corrosion resistance.

It can be repaired with Soray carbon nanomaterials, which are high-performance epoxy two-component composites reinforced by nanoinorganic materials and carbon nanotubes. The biggest advantage of this material is that the special nano-inorganic material is bonded with the oxygen of the epoxy ring molecule to improve the intermolecular bonding force, thereby greatly improving the comprehensive properties of the material, and can be well adhered to various metals, concrete, glass, plastics, rubber and other materials. It has good resistance to high temperature and chemical corrosion.

At the same time, good machinability and wear resistance can serve the wear regeneration of metal parts.

Applications: Wear repair of various bearing positions, bearing chambers (seats), keyways, threads, etc.; casting defects, cracks, transformer oil leakage; Protection of pumps, turbines, tanks, condensers, etc.

Cases related to the repair of wear and tear of paper machine dryer shaft heads.

The use of polymer composite materials (2211F metal repair materials) for on-site repair, the use of Fu ** mold with repair materials can be completed within 10 hours, which ensures the repair accuracy and operating conditions to the greatest extent, and the repair of the dryer bearing position has a good application effect, which is the preferred solution for on-site repair.

Four-point positioning repair method:

Mold repair method:

The acetylene gun is oiled and the surface is sanded with a polisher to reveal a metallic luster. According to the amount of wear, the auxiliary positioning point is welded on the shaft surface, and the unworn datum plane of the shaft is used to locate the knife edge ruler. First, the blended material 2211F is coated, and the datum is scraped with a knife edge ruler.

The inner diameter of the return sleeve purchased by the enterprise is not suitable for secondary treatment due to installation. The inner wall of the withdrawal sleeve is brushed with a release agent. After the repair material is cured, the surface is cleaned and re-coated with one group of materials, and the shaft surface size is repaired twice by using the withdrawal sleeve.

Install the bearing chamber and coat a small amount of material again, install the bearing to fasten the withdrawal sleeve, the bearing clearance is left and right, and the enterprise is required to weld the withdrawal sleeve firmly to prevent loosening and affecting the repair effect.