螺旋挤浆机是制浆造纸厂黑液综合利用理想的提取设备，用于木，竹，蔗渣，麦草，芦苇等为原料的纸浆黑液提取，同时也可用于废纸脱黑浆的黑液提取。由于螺旋挤浆机在运转过程中受到的轴向力特别大，所以容易导致轴承的损坏，进而造成轴承位的磨损。传统维修方法是拆卸设备，补焊后机加工，但是补焊高温产生的热应力无法完全消除，或对轴承位进行镶套处理，费时费力，也无法保证良好的配合。当前，发达国家针对上述设备问题多采用高分子复合材料进行现场维修，其中应用成熟的有美嘉华技术体系。相对传统方法，该维修方式可以做到免拆卸、免机加工现场修复，维修费用低、周期短、大大减轻了维修人员劳动强度。同时由于材料具有优异的综合机械性能和粘着力，不会产生高温应力，完全满足设备运行要求，可确保轴承室与轴承的良好配合，避免再次出现间隙的可能。

Spiral squeeze pulp machine is an ideal equipment for comprehensive utilization of black liquor in pulp and paper mills. It can be used to extract black liquor from wood, bamboo, bagasse, wheat straw, reed and other raw materials. It can also be used to extract black liquor from deinking pulp of waste paper. Because the axial force of the spiral squeeze pulp machine in operation is very large, it is easy to cause bearing damage, and then cause bearing wear. The traditional maintenance methods are dismantling equipment and machining after repair welding, but the thermal stress caused by high temperature of repair welding can not be completely eliminated, or the bearing position is treated by insertion, which is time-consuming and laborious, and can not guarantee good coordination. At present, the developed countries mostly use polymer composites for on-site maintenance to solve the above equipment problems, among which the mature Megawa technology system is applied. Compared with the traditional method, this maintenance method can achieve on-site repair without disassembly and machining. It has the advantages of low maintenance cost and short cycle，and greatly reduces the labor intensity of maintenance personnel. At the same time, because the material has excellent comprehensive mechanical properties and adhesion force, it will not produce high temperature stress, fully meet the requirements of equipment operation, can ensure good coordination between bearing chamber and bearing, and avoid the possibility of re-emergence of clearance.