The high cost of general construction equipment, so we have to take good care of construction machinery, engineering machinery prolong life.

In addition to minimizing the impact of harmful factors, it should also ensure the normal work load in the use of construction machinery. Here to explain in detail

1, to reduce the influence of temperature

In operation, the temperature of each component has its own normal range. Such as the cooling water temperature is generally 80-90 ℃, temperature of the hydraulic drive system of hydraulic oil is 30-60 ℃, less than or greater than this range will accelerate wear parts, causing deterioration of the lubricating oil, causing changes in material properties, and so on.

Tests showed that a variety of engineering machinery main drive gear and bearing lubricants operate at -5 ℃ in operation than in the lubricating oil 3 ℃, the wear and tear should be increased 10-12 times. But when the temperature is too high, will accelerate the deterioration of lubricating oil such as engine oil temperature exceeds 55-60 ℃, the oil temperature is increased by 5 ℃, the oxidation rate of the oil will be doubled. To this end, the engineering machinery in use, one to prevent overload performed at a low temperature, to ensure the normal operation of the low-speed pre-heating phase, the mechanical reach the required temperature before traveling or working, not because there was not a problem while ignoring its important role; Second, we must prevent the mechanical operation at high temperatures, mechanical process run should always check the values on the various thermometers, identify problems immediately stop inspection, found fault immediately removed. For reasons not find, we must not fail treated and still make mechanical work sick. In the usual work, pay attention to check the working conditions of the cooling system. For water-cooled machine, must be checked daily before work, and refresh the cooling water; for air-cooled machines, also regularly clean up the dust on the air cooling system to ensure the smooth flow of cooling air duct.

2, to reduce the effects of mechanical impurities

Mechanical impurities generally refers to some metal shavings, wear products and other dust, soil and other non-metallic materials and mechanical engineering in the course of self-generated. Once these impurities machinery inside, between the mating surfaces of machinery arrives, the harm is great, not only block out the relative motion, accelerated wear and tear of parts, and will scratch the mating surfaces, destroy the lubricant film, so that part temperature rise high and lubricants deterioration.

According to the determination, lubrication of mechanical impurities to 0.15%, the engine of the first piston ring wear rate is 2.5 times larger than normal; when the roll axis with entering foreign particle, its life will be reduced by 80% -90%. Thus, for work in harsh environments, conditions are very complex places of construction machinery, the one you want to use high-quality, supporting parts and lubricants, greases, blocking the source of harmful impurities; Second, we must do the work site of mechanical protection work to ensure that the appropriate bodies can work to prevent all kinds of impurities into the machinery inside. Mechanical malfunction, try to place a regular repair repair. When on-site repair, should take appropriate precautions to prevent the field repair and replacement of parts before entering the machine from dust and other impurities.

3, to reduce the corrosive effects of all kinds

The metal surface and the surrounding medium chemical or electrochemical action and the damage to occur phenomenon known corrosion. Such corrosion effect will not only affect the normal operation of mechanical equipment appearance, and will corrode the mechanical parts inside. Such as rain, air, chemicals and other mechanical parts through foreign channels, cracks, etc. into the machinery inside, corrosion, mechanical parts inside, accelerated mechanical wear, increased mechanical failure. Because of this corrosive effect sometimes invisible, intangible, easily overlooked, and thus greater the harm. In use, management and operations staff according to prevailing local weather conditions, air pollution and take effective measures to reduce the impact of chemical corrosion on the machinery, the focus is to prevent rain water and air in the chemical composition on the mechanical intrusion.

4, to ensure normal work load

The size and nature of construction machinery work load on the mechanical loss process has an important impact. In general, increasing the proportion to the wear of the parts with the load increased. When the parts to withstand the load is higher than the average design load, the wear will increase. In addition, under other conditions, stable load is smaller than the dynamic load wear, less failure, low life. Tests showed that the engine operate at relatively unstable load and stable work load, the cylinder wear will increase 2 times. Under normal work load of the engine, its failure rate is low, and life expectancy. Instead, overloaded engine, significantly increased the incidence of failure, life will be less than in the design specifications. Often in a wide range of load variation of the mechanical wear is greater than the mechanical stability of the continuous.