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Analysis of the Skills of Initiating Sliding Bearings (III)

Source: China Bearing Network Time: 2013-10-04

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3. Damage to the shaft and bearing bush by moving foreign objects:
There is a large foreign object between the bearing bush and the inner wall of the hole of the tile device; the movement of the bearing bush will have a convex appearance; when the shaft is working; the abnormal wear will start from the convex point; and expand to the periphery; Early damage of the bearing bush, if there is a large foreign object between the moving surface of the bearing bush and the shaft; the device will be embedded in the alloy layer of the bearing bush after the device; when working, the bearing shaft will also damage the bearing bush, the shaft and the tile and the device hole, etc. If the associated part has bumps and bumps, it will damage or damage the shaft and the tile.
Reasons for occurrence and avoidance: Oxidation or sedimentation of shaft, bearing bush, bushing hole (body, connecting rod); careful inspection and removal before installation; especially oil passage and tubing cavity, it is necessary to keep away from the site. In places where dust is flying and debris is splashed, the equipment used should be clean and hygienic; and the necessary protection measures should be adopted; avoid re-contamination; the smooth oil used in the installation should be hygienic; avoid dust mixing, shafts and bushings and bushing holes. The registration and installation; to ensure that it does not touch any metal objects and must not have any touch operations.
Second, the cause of the smooth system constitutes the damage and damage of the shaft and bearing bush:
1. Damage and damage appearance caused by poor smooth action:
When the smoothing effect of the shaft and the bearing bush does not meet the demand; there will be various fault characteristics. For example, the oil pressure is low; the part between the shaft and the bearing bush will cause damage and damage to the sports appearance due to the dry conflict of the direct touch; At the moment, the outer surface of the shaft is blue. If the smooth oil fails or the pressure cannot be built up; the appearance of the movement completely loses the protection of the oil film; the straight touch touches the dry conflict. The temperature rises the alloy layer of the bearing shell to melt; The appearance of "wa"; not stopping in time will constitute more severe damage to the parts.
The reason for the occurrence is: the oil level is too low or the smooth oil passage breaks, the oil suction filter, oil passage, oil hole is blocked, the oil pump wears or the oil suction line leaks, the pressure regulating valve and the pressure limiting valve are damaged, and the starter idles. If the time is too long, the high-speed work and full-load operation will be directly carried out without the warming work after the start-up of the start-up machine. After the full-load operation, if the temperature is high, it will stop without the idle load in the low-speed work; Heat accumulation; temperature rise, no standard oil is selected according to the rules and oil is changed regularly.
2. There is water in the smooth oil; damage and damage to the shaft and bearing bush are formed:
The damage of the water in the smooth oil to the shaft and the bearing bush is severe; the water will make the smooth oil damper damage the oil film. The outer surface of the alloy layer of the bearing bush has a hole-like gray material at the margin of the conflict surface; and it forms a black corrosion on the alloy surface. The outer surface of the bearing alloy conflicts with irregular pits and partial flakes.

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