Protective structure capable of improving strength of main shaft of gyratory crusher

Abstract

The invention relates to a protective structure capable of improving the strength of a main shaft of a gyratory crusher in the technical fields of a mine and building material machinery. The protective structure comprises a press plate, a protective shaft sleeve, the main shaft, a main shaft nut, a locking steel wire, occlusal bolts and a compression part group, wherein the compression part group is arranged on the main shaft; the protective shaft sleeve is arranged on a shaft neck at the upper part of the main shaft; the main shaft nut is connected with a thread A on the protective shaft sleeve in a matching way so as to be used for fixing the compression part group; after being heated and expanded, the protective shaft sleeve is arranged on the main shaft; the press plate is arranged at the outer side of the end surface of the protective shaft sleeve; the eight occlusal bolts pass through the press plate and a hole formed in the end surface of the protective shaft sleeve and then are used for fixing the press plate and the protective shaft sleeve on the main shaft in the matching way. After the protective structure is adopted, the risk that the shaft neck at the upper part of the main shaft is exposed outside and is directly contacted with ore so as to be easily scratched by the ore in the prior art can be overcome, the problem that the fatigue strength of the main shaft is weakened due to the stress concentration at parts such as the root of the large-diameter thread at the upper part of the main shaft, and a tool withdrawal groove can be solved, the accident that the shaft is broken is avoided, and the economic losses of small factories and mines can be reduced.

Description

technical field [0001] The invention relates to a protection structure for improving the main shaft strength of a gyratory crusher in the technical field of mining and building materials machinery. Background technique [0002] At present, gyratory crushers and single-cylinder hydraulic cone crushers are a kind of crushing equipment, which are mainly used for crushing rocks and ores of various hardness. With the enlargement of mines and building materials and aggregate companies, the demand for the output per unit hour of the crusher is getting higher and higher, so the crusher is gradually developing into a larger size, with more complex structures, larger volumes, and harsher working conditions and load conditions. , higher requirements on the stability and reliability of the crusher. The main shaft is one of the most important parts of various large and medium-sized gyratory crushers and single-cylinder hydraulic cone crushers. Due to the high cost of processing, manufac...

AI Technical Summary

Problems solved by technology

The structure of large and medium-sized gyratory crushers and single-cylinder hydraulic cone crushers designed and manufactured today has the following disadvantages: the journal on the upper part of the main shaft is exposed, which is in direct contact with the ore, and there is a risk of being scratched by the ore; Stress concentration exists in the sipe, etc., which weakens the fatigue strength of the spindle

Once the spindle fracture accident caused by the above shortcomings occurs, it will seriously affect the production of factories and mines, cause huge economic losses, and even cause casualties.

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