The hazards of excessive hydraulic oil temperature are as follows.
1. Hydraulic oil viscosity, volumetric efficiency and hydraulic system working efficiency are all reduced, leakage increases, and even mechanical equipment can not work properly.
2. The parts of the hydraulic system expand due to overheating, which destroys the original normal fit clearance of the relative moving parts, resulting in increased frictional resistance and easy seizure of the hydraulic valve. At the same time, the lubricating oil film becomes thinner and mechanical wear increases, resulting in pumps and valves. Precision mating surfaces of motors, motors, etc. are disabled or scrapped due to premature wear.
3. Accelerate the deterioration of the rubber seals, shorten the service life, and even lose its sealing performance, causing serious leakage of the hydraulic system.
4, oil vaporization, water evaporation, easy to make the hydraulic components cavitation; oil oxidation to form a gel-like deposit, easy to block the oil filter and small holes in the hydraulic valve, so that the hydraulic system can not work properly.
Therefore, the excessive temperature of the hydraulic oil will seriously affect the normal use of the machine, reduce the service life of the hydraulic components, and increase the maintenance cost of the construction machinery.
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