Graphite copper sleeve is a kind of self-lubricating bearing embedded with graphite. It is a kind of solid lubricant with well-arranged and appropriate pores developed on the friction surface of the copper sleeve as the metal matrix, and embedded with graphite or molybdenum disulfide. Products with self-lubricating properties.
The working principle of the graphite copper sleeve bearing is to use its own oil absorption and oil discharge process to achieve the principle of self-lubrication. Generally, the graphite copper sleeve generates heat during the working process, so the oil originally sucked in will release the oil after being heated. To achieve the purpose of self-lubricating.
Generally, solid lubricants account for 20-30% of the friction surface area. The lubrication principle of graphite copper sleeve self-lubricating bearings is that during the sliding friction process between the shaft and the bearing, a part of the graphite particles is transferred to the friction surface of the shaft and the bearing to form a The solid lubricating diaphragm with a relatively stable layer prevents direct adhesive wear between the shaft and the bearing.
The graphite copper sleeve combines the respective performance advantages of metal alloys and non-metal anti-friction materials, and complements them. It not only has the high load-bearing capacity of metals, but also obtains the lubricating properties of anti-friction materials. Therefore, it is especially suitable for environments such as no refueling, less refueling, high temperature, high load or water. At present, graphite copper sleeves have been widely used in construction machinery, metallurgical machinery, mining machinery, locomotive supports, steel rolling equipment, ship machinery, mold equipment, textile machinery, gas turbines and other low-speed heavy-duty, high-speed light-duty applications.
Although there are so many advantages, the graphite copper sleeve is not perfect. Limited by the current manufacturing process, the cost of the graphite copper sleeve is relatively high. According to the response of senior people, due to the harsh domestic working environment, construction vehicles are often neglected to maintain, and the service life of the graphite copper sleeve is greatly affected. In actual use scenes, it does not show its wear-resistant and durable characteristics, and sometimes even more delicate than ordinary pin sleeves.
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