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First, try to reduce the impact of harmful factors 1, to reduce the impact of continued impurities Mechanical impurities generally refers to dust, soil and other non-metallic materials and construction machinery during the rise of some of the metal shavings, wear and tear products. Once these impurities enter the machine to reach the mechanical mating surface, the harm is great, not only the relative movement out of the block, accelerate the wear and tear parts, and will scratch with the surface, the destruction of lubricating film, so that parts temperature rise High, deterioration of oil. It is determined that when the mechanical impurities in lubricating oil increase to 0.15%, the wear degree of the first piston ring of the engine will be 2.5 times larger than normal; when the rolling bearing enters the impurity particles, its life will be reduced by 80% to 90%. Therefore, for construction machinery working in harsh environment and complicated conditions, it is necessary to use high-quality and matched spare parts, lubricating oil and grease to block the source of harmful impurities. Secondly, we must do a good job of mechanical protection work on site , To ensure that the appropriate agencies to work properly to prevent all kinds of impurities into the machine. The failure of the machinery, as far as possible to repair the regular repair sites coal mill. On-site repair, but also to make protective measures to prevent on-site repair of parts replaced by dust and other impurities before entering the machinery of pollution. 2, to reduce a variety of corrosion Metal surface and the surrounding medium chemical or electrochemical reaction suffered damage phenomenon called corrosion Raymond mill. This corrosion will not only affect the normal operation of the mechanical surface equipment, but also corrosion to the mechanical parts inside. Such as rain, chemicals in the air through the mechanical parts of the external channels, cracks and other internal access to the machine, corrosion of internal mechanical parts, accelerated mechanical wear and tear, increase the mechanical failure of cement production equipment. Because of this corrosion is sometimes invisible. Touching, easily overlooked, so its more harmful composite crusher. In use, management and operation personnel should take effective measures according to local weather conditions and air pollution at the time to reduce effective measures and reduce the impact of chemical corrosion on machinery. The key point is to prevent rainwater and airborne chemical components from invading machinery . 3, to reduce the impact of temperature At work, the temperature of each component has its own normal range of double-roll crusher. Such as the general cooling water temperature is 80 ~ 90 ℃, hydraulic transmission system hydraulic oil temperature is 30 ~ 60 ℃, below or beyond this range will accelerate the wear and tear of parts, causing deterioration of lubricants, resulting in changes in material properties and so on. Tests showed that all kinds of construction machinery, the main drive gear and bearings in the -5 ℃ lubricant running at 3 ℃ in the lubricating oil operation, wear to increase 10 to 12 times lithotripsy. But when the temperature is too high, it will speed up the deterioration of oil, such as oil temperature check 55 ~ 60 ℃, the oil temperature increased by 5 ℃, the oxidation rate of oil will be doubled. To this end, the construction machinery in the process, we must prevent overload under low temperature operation, to ensure the normal operation of low-speed pre-temperature phase, so that machinery to reach the required temperature before driving or working, not because there was no problem at the time and ignore its Important to do; Second, to prevent mechanical operation at high temperatures, the mechanical operation process should always check the value of a variety of thermometers and found the problem immediately shut down and found that failure even ruled out on the roller break. For reasons that can not be found for a while, we must not untangle the machinery and still bring the sick to work. In normal work, pay attention to check the working condition of the cooling system compound crusher. On the water-cooled machinery, daily work must be checked, add additional cooling water; air-cooled machinery, but also to regularly clean the dust on the air-cooled system to ensure smooth cooling air duct.