hydraulic oil is the blood of the Hydraulic System, its quality directly affects the efficiency and service life of the hydraulic pump. With time, hydraulic oil will inevitably experience oxidation, pollution, and other deterioration phenomena, which will cause serious damage to the hydraulic system. Therefore, regular inspection of the quality of hydraulic oil, timely detection and treatment of deterioration problems, to ensure the stable operation of the hydraulic system is essential.
Appearance changes:
Emulsification: the hydraulic oil appears milky white or yellow cloudy, indicating that the oil is mixed with a large amount of water, resulting in emulsification.
Discoloration: Hydraulic oil becomes darker in color, or even black sediment appears, indicating that the oil has oxidized and deteriorated.
Turbidity: If the hydraulic oil becomes cloudy, the oil contains impurities.
Change in performance:
Viscosity changes: too high or too low viscosity can affect the performance of the hydraulic pump.
Increased acid value: Increased acid value indicates severe oxidation and increased corrosiveness of the oil.
Increased moisture content: Increased moisture content can lead to rust, and emulsification, affecting the lubricating properties of the hydraulic system.
Increased air bubbles: increased air bubbles in the hydraulic oil will affect the stability of the hydraulic system, resulting in noise.
Visual inspection:
Color: Compare with the new oil, and observe whether the color changes.
Transparency: Observe whether the oil is clear and transparent and whether there are impurities.
Sediment: Check whether there is sediment in the oil sump.
Sensory inspection:
Odor: Smell the hydraulic oil whether there is an odor, such as burnt flavor, or sour smell.
Viscosity: Dip your finger into a small amount of hydraulic oil, and feel whether the viscosity changes.
Physical test:
Moisture test: Use a moisture meter to measure the moisture content in the hydraulic fluid.
Acid Test: Measure the acid value of the hydraulic fluid using an acid tester.
Viscosity Test: Measure the viscosity of the hydraulic fluid using a viscometer.
Particle Size Test: Measurement of the particulate matter content of the hydraulic fluid using a particle size tester.
Oxidation: Hydraulic oil comes into contact with air and oxidizes at high temperatures and pressures.
Contamination: Hydraulic system sealing is poor, and external impurities into the hydraulic oil.
Thermal decomposition: Thermal decomposition of hydraulic fluid at high temperatures.
Water intrusion: The hydraulic system is not sealed properly and water enters the hydraulic fluid.
Increased wear: deteriorated hydraulic oil lubrication performance is reduced, accelerating the wear of Hydraulic Components.
Reduced system efficiency: hydraulic oil deterioration will increase the pressure loss of the hydraulic system, reducing system efficiency.
System failure: Serious failure of the hydraulic system, or even shutdown.
Regular replacement of hydraulic oil: According to the equipment instruction manual, regular replacement of hydraulic oil.
Select high-quality hydraulic oil: Select high-quality hydraulic oil that meets the requirements of the equipment.
Strengthen the seal: check the hydraulic system seals, and timely replacement of aging or damaged seals.
Installation of oil filters: install efficient oil filters to prevent impurities from entering the hydraulic system.
Control oil temperature: take measures to reduce the temperature of the hydraulic oil, such as increasing the cooling device.
Regular inspection: regularly check the quality of hydraulic oil, timely detection and treatment of problems.
Hydraulic oil deterioration is a common problem in hydraulic systems but can be avoided by taking effective preventive and treatment measures. Regularly checking the quality of hydraulic oil and timely replacement of deteriorated hydraulic oil can effectively extend the service life of the hydraulic system and ensure the normal operation of the equipment.
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