A kind of repair method of reducer bearing seat

Abstract

A speed reducer bearing block repair method includes the steps: (1) disassembling a speed reducer, cleaning a bearing block, detecting the size of the bearing block, determining a damaged portion and abrasion loss and removing a fatigue layer; (2) pre-coating the surface of a substrate of the bearing block with pure carbon powder mixed with white emulsion, and performing plasma arc cladding; (3) pre-coating the surface of an inner hole of the bearing block having a carbon powder layer with prepared alloy powder by plasma arc cladding; (4) performing machining and flaw detection for the clad bearing block to obtain the bearing block with the size and tolerance meeting requirements and assemble the speed reducer. The alloy powder comprises, in weight percent, 0.3%-0.5% of C, 14%-16% of Cr, 16%-18% of Fe, 2%-2.8% of P, 2.5%-3% of Si, 1%-3% of W and the balance Ni. The repair method is simple in process, high in controllability and less in energy consumption, the service life of the bearing block is obviously prolonged, and reliability of the bearing block is obviously improved.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and in particular relates to a method for repairing a bearing seat of a reducer. Background technique [0002] The reducer is an important transmission equipment widely used in the industrial field. During the long-term use of the reducer, due to factors such as harsh working conditions, metal fatigue, and wear, the bearing seat is prone to heat, noise, and oil leakage, and even the phenomenon of "outer ring rotation" of the bearing occurs. If it is not repaired in time , Seriously affect the safe operation of the reducer, causing production accidents. [0003] Due to the high strength, high hardness and high running precision of the bearing material, it is required that the bearing seat of the reducer has moderate hardness, good impact resistance and shock absorption. The bearing seat of the reducer is mainly made of gray cast iron, which has poor weldability and is prone to white structur...

AI Technical Summary

Problems solved by technology

The bearing seat of the reducer is mainly made of gray cast iron, which has poor weldability. It is easy to produce white structure, pores and cracks during welding. The conventional welding method is not suitable for repairing the bearing seat.

[0004] At present, there are mainly two repair methods for the bearing seat of the reducer: one is to use the sleeve method to add a sleeve between the worn bearing seat and the bearing, but this method has obvious disadvantages. The gap between the sleeve and the bearing is too small, which may easily cause the bearing to heat up. On the contrary, it is easy to cause the bearing to slip, and the number of repairs is limited; the second method is to use the brazing method, but this method is complicated in process, long in construction period, high in cost, and the copper alloy is relatively soft, and it is easy to wear and peel after repairing, resulting in the occurrence of bearing damage. Partial wear and heating phenomenon

The above-mentioned repair technology can no longer meet the long-life and high-quality requirements of industrial and mining enterprises for the repaired reducer bearing seat, and there is an urgent need for a repair method with low energy consumption, low cost, environmental protection, long life, and strong process controllability