Knowledge to Answer
Bearing early analysis of the causes of damage
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As a sliding bearing and bearing the main link kilowatts, using the most common failure is a spin-off or wear-resistant alloy layer burning, as well as the early bearing wear.
If the diesel engine after a short-term operation, the bearing surface that is the rapid wear and tear or serious damage, most of the reasons for not bearing its own, and was mainly due to the use of conditions or with parts or technical condition caused by poor. A survey showed that the material, bearing 44.9 percent of the causes of damage is caused by impurities, is 13.4 percent non-performing assembly, 12.7% concentricity is bad, bad lubrication is 10.8 percent, 9.5 percent is overload, the rest are other factors such as corrosion.
In the diesel engine start-up, parking, often at a critical bearing lubrication, oil film can stop direct contact with the surface friction. Even if the diesel engine in normal operation, due to factors such as instability in the load, and the journal bearings are also difficult to maintain a continuous and homogeneous liquid lubrication. In addition, the new diesel engine in the assembly failed to completely remove sand and iron filings may be operating in the process of dust into the dirt, but also to accelerate the wear and tear, causing the main reason for bush-burning lava.
Bearing off was mainly due to fatigue damage. Bearing load suffered because of the size and direction of change over time, when the load of instability, friction bearings on the surface can not be maintained evenly in a row between the film and the film is also pressure pulse to change. In the minimum film thickness, surface carrying the local high temperature in the region have greatly reduced the alloy layer of anti-fatigue. In addition, the bearing assembly to create its own non-performing, but also led to the alloy layer peeling off the direct cause.
In addition to the wear and peeling off, sliding bearings is also worth noting that the corrosion problem, largely depends on the quality of the oil, temperature, pressure and load bearing. The high-load bearing parts of the most vulnerable to corrosion, and the lubricating oil at a high temperature and the deterioration of the organic acid generation and bearing sulfide corrosion is caused by the direct cause.
Bearing the burning, that is usually described as "bush-burning," The main reason is that space is too small, lubrication and the use of non-performing operations in question.
If the diesel engine after a short-term operation, the bearing surface that is the rapid wear and tear or serious damage, most of the reasons for not bearing its own, and was mainly due to the use of conditions or with parts or technical condition caused by poor. A survey showed that the material, bearing 44.9 percent of the causes of damage is caused by impurities, is 13.4 percent non-performing assembly, 12.7% concentricity is bad, bad lubrication is 10.8 percent, 9.5 percent is overload, the rest are other factors such as corrosion.
In the diesel engine start-up, parking, often at a critical bearing lubrication, oil film can stop direct contact with the surface friction. Even if the diesel engine in normal operation, due to factors such as instability in the load, and the journal bearings are also difficult to maintain a continuous and homogeneous liquid lubrication. In addition, the new diesel engine in the assembly failed to completely remove sand and iron filings may be operating in the process of dust into the dirt, but also to accelerate the wear and tear, causing the main reason for bush-burning lava.
Bearing off was mainly due to fatigue damage. Bearing load suffered because of the size and direction of change over time, when the load of instability, friction bearings on the surface can not be maintained evenly in a row between the film and the film is also pressure pulse to change. In the minimum film thickness, surface carrying the local high temperature in the region have greatly reduced the alloy layer of anti-fatigue. In addition, the bearing assembly to create its own non-performing, but also led to the alloy layer peeling off the direct cause.
In addition to the wear and peeling off, sliding bearings is also worth noting that the corrosion problem, largely depends on the quality of the oil, temperature, pressure and load bearing. The high-load bearing parts of the most vulnerable to corrosion, and the lubricating oil at a high temperature and the deterioration of the organic acid generation and bearing sulfide corrosion is caused by the direct cause.
Bearing the burning, that is usually described as "bush-burning," The main reason is that space is too small, lubrication and the use of non-performing operations in question.
