Reasons and preventive measures for the high temperature of hydraulic oil
Summary:Improper choice of oil The brand, quality and viscosity grade of the oil do not meet the requirements, or the hydraulic oil of different grades is mix...
Improper choice of oil
The brand, quality and viscosity grade of the oil do not meet the requirements, or the hydraulic oil of different grades is mixed, resulting in the hydraulic oil viscosity index being too low or too high. If the oil viscosity is too high, the power loss will increase and the oil temperature will rise; if the viscosity is too low, the leakage will increase and the oil temperature will rise.
Preventive measures: The selection of oil should be determined according to the grade recommended by the manufacturer, the working environment where the machine is located, and temperature factors. For some machines with special requirements, special hydraulic oil should be used; when the maintenance of hydraulic components and systems is inconvenient, anti-wear hydraulic oil with good performance should be used.
The construction site environment is harsh. With the increase of the working time of the machine, impurities and dirt are easily mixed into the oil. The contaminated hydraulic oil enters the matching gap of the pump, motor and valve, which will scratch and destroy the accuracy and roughness of the matching surface. , so that the leakage increases and the oil temperature rises.
Preventive measures: Generally, change the oil after more than 1000 hours of accumulated work. When changing the oil, pay attention not only to drain the old oil in the fuel tank, but also to replace the old oil of the entire system pipeline and working circuit; it is best to use a filter screen of 120 mesh or more when refueling, and add enough oil according to the regulations, so that the The oil has sufficient circulating cooling conditions. In case of sudden failure caused by hydraulic oil pollution, be sure to filter or replace the oil used in the hydraulic system.
The oil level in the hydraulic tank is too low
If there is too little oil in the hydraulic oil tank, the hydraulic system will not have enough flow to take away the heat it generates, resulting in an increase in oil temperature.
Preventive measures: In the actual operation and maintenance process, strictly abide by the regulations on the hydraulic oil level in the operating procedures.