Roller shaft assembly having air cooling structure and used for crushing machine and air cooling roller shaft type crushing machine

Abstract

The invention relates to a roller shaft assembly having an air cooling structure and used for a crushing machine and an air cooling roller shaft type crushing machine. The roller shaft assembly comprises a core pipe and a roller sleeve which is fixedly sleeved with the core pipe and is composed of a plurality of parallel gear-shaped rollers, wherein one end of the core pipe is connected with a driving speed-reducing motor by a driving end shaft head and the other end of the core pipe is supported on a bearing seat by a follow-up end shaft head. The roller shaft assembly is characterized in that an inner end opening of the follow-up end shaft head is connected with an air guide pipe; each gear-shaped roller is internally provided with a roller air passing channel and forms a roller sleeve air passing channel; one end, which is close to a follow-up end of the core pipe, of the roller sleeve is provided with an air inlet end sleeve; the other end, which is close to a driving end of the core pipe, of the roller sleeve is provided with an air outlet end sleeve with a plurality of air outlets; the core pipe is provided with a core pipe air passing hole which is communicated with the follow-up end air inlet end sleeve and the air passing channel of at least one gear-shaped roller. The air cooling roller shaft type crushing machine is characterized in that the roller shaft assembly having the air cooling structure is adopted. The roller shaft assembly having the air cooling structure and the air cooling roller shaft type crushing machine have the advantages that the product performance is improved, the cost is reduced and the service life is prolonged.

Description

technical field [0001] The invention relates to a roller shaft crusher used in the cement industry, in particular to an air-cooled structure roller shaft assembly for the crusher and the air-cooled roller shaft crusher. Background technique [0002] In recent years, the grate cooler used by cement production enterprises to cool clinker has developed into a two-stage grate bed cooler with a roller crusher in the middle, which has significantly improved energy saving and consumption reduction and clinker cooling effect. Some roller crushers mainly include 2-3 pairs of roller shaft assemblies arranged in parallel horizontally or 1 feed roller for conveying materials reconfigured as needed. The roller shaft assembly is equipped with a roller shaft, and the roller shaft includes a core tube. And the roller sleeve formed by several parallel toothed rollers is fixed on it through the key, the axial end of the roller shaft is connected with the limit flange coaxially arranged with t...

AI Technical Summary

Problems solved by technology

When working, each pair of rollers crushes the bulk material to particles with a particle size below 25mm during the rotation process. Since the temperature of the rollers can reach about 450°C when the material temperature is as high as 500-600°C, this is required. The roller sleeve of this type of roller crusher must be resistant to high temperature and wear, so the material selection is very strict. Generally, high-strength alloy materials such as high chromium and high nickel must be used to manufacture roller sleeve castings, and the price is as high as 50,000-60,000 yuan / ton, high manufacturing cost

However, its hardness is about 40HRC, and its wear resistance decreases after high temperature, and it is prone to cracks. Once the wear is serious, it cannot be repaired and can only be replaced with a new one, so the operating cost is also high.

Moreover, working at high temperature will cause the bearing to overheat and cause damage. Moreover, the existing roller sleeve is a solid body, which requires many consumables and high product cost.

[0003] In addition, as mentioned above, there is an expansion gap between the roller sleeve and the limit flange, but because of the rigid connection, under the action of the rotating radial force component, the roller sleeve will move to the shaft end, and the workpiece will be caused by hard contact. damage

In particular, the shaft body also bears the bending force formed by the weight pressure of the roller sleeve, the lateral pressure of the extruded material and its own gravity, which also leads to its easy deformation and damage, which affects the service life

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