Restoring method of eccentric bushing and eccentric bushing

Abstract

The invention relates to a restoring method of an eccentric bushing, which comprises a cast steel matrix on which Babbitt alloy composite layers are poured and comprises the following steps of A, preparing, cleaning and washing a to-be-restored eccentric bushing and manufacturing a restoring tool; B, removing the original Babbitt alloy composite layers; C, performing flaw detection on the cast steel matrix subjected to the treatment in the step B; D, protecting a non-welding position; E, blocking slots and holes on the cast steel matrix by welding; F, overlaying the cast steel matrix by aluminum bronze to prepare a semi-finished product of the eccentric bushing; and G, machining. The method has the beneficial effects that the operation is simple, and field operation is facilitated; the restoring period is short, and the cost is low; the restored eccentric bushing is good in bonding strength; local or overall repeated restoration utilization is realized. The invention also discloses the eccentric bushing, which comprises the cylindrical cast steel matrix, and the inner wall and the outer wall of the cast steel matrix are overlaid with the Babbitt alloy composite layer respectively. The eccentric bushing has the benefit that the service life is prolonged by more than one time that of the original product.

Description

technical field [0001] The invention relates to a cone crusher, in particular to a repair method for an eccentric sleeve of the cone crusher and the eccentric sleeve. Background technique [0002] The eccentric sleeve is one of the important parts in the crusher system. It is responsible for the power transmission of the coarse crushing of the raw ore. Under actual working conditions, it bears great impact force, shear force and extrusion force, etc. Periodic action of alternating stress. Its frequent work cycle, complex stress state and harsh working environment determine that the eccentric sleeve must have high processing quality. The current eccentric sleeve includes a cast steel matrix, on which a Babbitt alloy inner sleeve and a semicircular arc-shaped outer sleeve are poured. In order to improve the bonding strength between the Babbitt alloy and the cast steel matrix, a A plurality of through holes are set radially, and a plurality of grooves are set on its inner wal...

AI Technical Summary

Problems solved by technology

Its frequent work cycle, complex stress state and harsh working environment determine that the eccentric sleeve must have high processing quality

The current eccentric sleeve includes a cast steel matrix, on which a Babbitt alloy inner sleeve and a semicircular arc-shaped outer sleeve are poured. In order to improve the bonding strength between the Babbitt alloy and the cast steel matrix, a A plurality of through holes are set radially, and a plurality of grooves are set on its inner wall, the purpose is to improve the bonding strength between the Babbitt alloy and the cast steel matrix, so that although the manufacturing cost is increased, it still cannot solve the problem of the fastness of the eccentric sleeve. Failure problem, generally the normal service life is only 6 months or even less than one month

The early failure of the eccentric sleeve is mainly due to the shedding and cracks of the Babbitt alloy layer, which cannot meet the requirements of use, but the cast steel matrix is ​​generally still intact, and now it is repaired by returning the eccentric sleeve to the manufacturer for recasting

Due to the large volume and weight of the eccentric sleeve, the transportation and maintenance costs are very high. For example, the cost of repairing an eccentric sleeve with a length of 1.8 meters is 130,000 to 160,000 yuan, and the service life is still not long, which greatly increases reduce the production cost of equipment users

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