Medium and thick plate straightening machine intermediate roll assembly

Abstract

An intermediate roller assembly for a straightening machine for medium and thick plates is used for a sixfold type medium and thick plate straightening machine roller box in steel and nonferrous industries. An intermediate roller is provided with a spiral groove, two ends of the intermediate roller are provided with a thrust cylindrical roller bearing and a needle bearing, an end cover is arranged on the end face of the intermediate roller, the needle bearing and the thrust cylindrical roller bearing are arranged in a bearing casing, and the thrust cylindrical roller bearing is located axially. A lip opening of a sealing ring is attached to a sealing loop, the sealing ring is arranged on the bearing casing, an inner hole of the sealing loop is provided with an annular groove, a dustproof cover fastens the sealing loop on the intermediate roller through a screw, an inner conical face of the dustproof cover enables metal foreign matters to be thrown out in a centrifugal mode or fall freely, a top cover is connected with the bearing casing through a screw, the outer end face of the top cover is a spherical face, and the bearing casing is located axially through the end cover. The intermediate roller assembly has good sealing performance, can effectively prevent the foreign matters from entering the bearings, is high in bearing capacity, can reduce fault hidden danger and avoids tremendous economical loss caused by unexpected halt and overhauling.

Description

technical field [0001] The invention relates to the technical field of steel and non-ferrous metal industries, in particular to an intermediate roller assembly suitable for a six-fold medium-thick plate straightening machine. Background technique [0002] The six-fold plate straightening machine is used in steel and non-ferrous metal industries, and is used to straighten plates ( figure 2 No. 15) heavy-duty metallurgical equipment. Six-fold means that the upper roll box and the lower roll box each have three layers of rollers, that is, one layer of straightening rolls ( figure 2 No. 13), a layer of middle roller ( figure 2 No. 14), a layer of backup rollers ( figure 2 number 16). The intermediate roller assembly is composed of a single intermediate roller and other parts at both ends, its function is to improve the stress condition of the straightening roller 13 and the backup roller 16 during work, and at the same time protect the surface of the straightening roller 13 ...

AI Technical Summary

Problems solved by technology

[0004] image 3 , Figure 4 It is a representative structure of the prior art, and it has two problems: ① the bearing 17 or 18 is easy to get stuck; ② the plug 19 is easy to break from the root

Both of these phenomena will cause inflexible rotation of the intermediate roll, scratch the surface of the straightening roll and affect the surface quality of the straightening plate

There are two reasons for these two phenomena: ①The working environment is poor, there are metal powder and metal debris flying, and the lip of the sealing ring 20 fails after working for a period of time, and foreign matter will easily invade the inside of the bearing; ②Due to the It is required that the intermediate roller assembly can move freely in the axial direction, left or right, and has a certain axial impact, but the structure of the existing technology limits the selection of bearing models, and the bearing capacity is small, which is easy to cause heat generation

If any kind of failure occurs, even if it can be shut down and replaced in time, it will be a complicated and difficult task

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