The inner circle of bearing running is a common name, and there are many factors that it produces. It can cover the following points:

1. The size of the interference between the bearing and the shaft is compatible with the size of the load. If the amount of interference is insufficient, the friction between the bearing and the journal will be insufficient to run the inner ring.

2. The positioning of the shaft is not good, causing the shaft to move in the axial direction, causing the bearing to run inside the ring;

3. The axial fixation of the bearing is unreasonable, or the bearing’s inner ring and shaft shoulder (lock nut, shaft end retaining ring) are not axially fastened;

4. It may be lack of oil, resulting in poor bearing rotation, long time, bearing position wear.

For the shaft running inner ring, there is a way to beat the spot under emergencies, but it is only emergency; under conditions permitting repair welding machine processing, insert bushing plating, spraying, micro arc welding, laser welding, etc. The advantages and disadvantages of this kind of repair technology are simply analyzed for your reference.

●Heating process

The repairing process is a kind of emergency measure. Repairing the bearing inner ring and the shaft with only the point contact, so when the heavy-duty operation, pits easily wear and tear, repair failure.

● Brush plating process

Its advantage is that it can be repaired online. The disadvantages are very obvious. The brush plating process of the brush plating process is limited by the amount of wear. Generally, the brush plating thickness of the brush plating coating is less than 0.2 mm. When the wear amount is more than 0.2mm, the brush plating efficiency will decrease exponentially, and when the brush plating layer is too thick, the brush plating layer will fall off during use and the service life will be short.

● Thermal spray repair technology

Thermal spraying refers to a series of processes in which finely dispersed metallic or non-metallic coating materials, in a molten or semi-molten state, are deposited on the surface of a prepared substrate to form a kind of spray deposition. Floor. It uses a heat source (such as electric arc, plasma spraying or burning flame, etc.) to heat the powdered or filamentous metal or non-metal material to molten or semi-molten state, and then sprays it at a certain speed by means of flame leaving itself or compressed air. The surface of the pretreated substrate is deposited to form a surface coating with various functions. Utilize energy provided by fuel gas or arcs.

The biggest limitation of the thermal spraying process is the inability to perform on-site repairs, and the need for machining after spraying, which is inefficient, and has limitations for large shaft wear applications.

● repair welding machine processing technology

Repair welding machine repair process is the most common method in the traditional process repair process, which is characterized by high repair accuracy. The disadvantages of thermal stress on the material caused by the damage, easy to run during the phenomenon of broken axis, resulting in downtime or production stop accident.