Replacing method of light ash calcine furnace rolling ring

Abstract

A light ash calciner race ring replacement method comprises a light ash calciner furnace body consisting of a feeding packing auger, a free end race ring, a gear ring and a fixed end race ring. The replacement method is that the feeding packing auger is extracted from the furnace body and the free end race ring, a gear ring base and the fixed end race ring are sheathed on a furnace end. The structure of the gear ring base is that a plurality of groups of gear ring base plates are retrofitted between the gear ring and the furnace body; the gear ring base plates are welded directly on the furnace body; the gear ring base is adjusted through a drill key and an alignment of a big gear ring is conducted by the gear ring base. The invention has the advantages that the adoption of the technical scheme ensures that the average time for replacing a race ring is 15 days when a monomer of the light ash calciner is overhauled; after the overhaul, the running of the light ash calciner is steady; not only the replacement of the race ring and the gear ring in the future does become convenient by remodeling the race ring, a race ring base plate, the gear ring and the gear ring base plate, but alsothe service lives of the race ring, the gear ring, a carrying wheel and the calciner furnace body are greatly prolonged.

Description

technical field [0001] The invention relates to a method for replacing rolling rings of a light ash calciner. Background technique [0002] The entire weight of the light ash calciner body is transmitted to the two sets of supporting wheels through the rolling rings, so the rolling rings and the supporting wheels must bear a large contact stress, and the friction and pressure generated by the operation will damage the rolling rings, mainly The geometric accuracy of the surface is destroyed, and the long-term heavy-duty operation aggravates the wear of the outer surface of the rolling ring. Due to the large extrusion stress during the rotation, a large area of ​​pits appear on the outer surface of the rolling ring and parallel to the axis of the furnace body. When the furnace body is running, there will be serious vibration. If it is not repaired in time, the service life of the supporting wheel bearing will be greatly shortened. Usually, the method of turning the rolling ri...

AI Technical Summary

Problems solved by technology

Usually, the method of turning the rolling ring is mainly based on the model turning. Although the vibration is reduced, the surface hardness of the rolling ring will be reduced, and the wear of the rolling ring will be aggravated. Each turning needs to reduce the speed of the furnace body to To achieve the turning effect, the normal speed of the furnace body is 3.8 rpm, and the speed drops to 2.2 rpm during turning. The output is 42 tons / hour at normal speed, and 24 tons / hour during turning. It takes an average of 72 hours for each turning Above, after 6-9 turnings per year, the thickness of the rolling ring is reduced from the designed 225 mm to less than 180 mm, and the production efficiency is reduced at the same time

But the disadvantages are more obvious. To dismantle the steam chamber as a whole is to disconnect the steam chamber and the main heating pipe. The workload of dismantling is very large. When restoring, since the heating pipe is welded to the steam chamber by expansion welding at the initial stage of installation, the heating pipe must be welded. Deformation, the structure of the metal base metal has also been destroyed, which is not conducive to welding again. Even if it can be welded, the maintenance period is long, and the general overhaul period is 45 days

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