The main reasons for the excessively high oil temperature in a hydraulic system include poor heat dissipation, improper oil selection, system design flaws, and environmental factors, etc.
The main reason
Poor heat dissipation: The fuel tank is designed too small or the cooler is ineffective, resulting in poor oil circulation and insufficient heat dissipation capacity.
Improper selection of oil: The brand, quality, and viscosity grade of the hydraulic oil used do not meet the requirements, or different grades of hydraulic oil are mixed, resulting in excessively high or low viscosity of the oil, which in turn causes the oil temperature to rise.
System design flaws: The hydraulic system lacks an effective unloading circuit, or the oil pipes are too thin or too long, resulting in energy loss and heat generation.
Environmental factors: Hydraulic oil is prone to overheating when working in high-temperature environments, especially in summer.
Severe leakage: There is leakage in the system, which causes energy loss to be converted into heat and increases the oil temperature.
Air or moisture entry: Mixing air or moisture into the hydraulic oil can lead to an increase in heat, causing overheating.
Reversing and speed shock: The shock generated during reversing or speed changes can also cause the oil temperature to rise.
"Influence"
Performance decline: Excessively high oil temperature can lead to a decrease in the viscosity of the hydraulic oil, increased leakage, and reduced system efficiency.
Component damage: High temperatures can accelerate the aging of rubber seals, leading to leakage and even damage to hydraulic components.
Increased maintenance costs: Excessively high oil temperatures will shorten the service life of hydraulic oil and increase the maintenance costs of equipment.
Preventive Measure
A well-designed fuel tank: Ensure that the fuel tank has sufficient capacity and consider installing a cooler to enhance heat dissipation.
Regularly change the hydraulic oil: Keep the hydraulic oil clean and change it regularly to prevent contamination.
Optimize system design: Improve the system design to ensure the normal operation of the unloading valve and reduce unnecessary energy loss.
Select the appropriate hydraulic oil: Choose the appropriate hydraulic oil according to the equipment requirements and ensure its viscosity is moderate.
Through the above measures, the problem of excessively high oil temperature in the hydraulic system can be effectively prevented, ensuring the normal operation of the system and extending the service life of the equipment.
