hydraulöljyihin

Hydraulic oils, also known as hydraulic fluids, are specialized lubricants designed for use in hydraulic systems. These systems are commonly found in heavy machinery, such as excavators, bulldozers, and cranes, as well as in various industrial applications like presses and milling machines. The primary function of hydraulic oil is to transmit power from a pump to actuators, such as cylinders and motors, while providing lubrication to reduce wear and tear.

Hydraulic oils must meet specific performance criteria, including viscosity, pour point, and resistance to shear and oxidation. They are typically classified into groups based on their viscosity index, with the most common groups being ISO VG 32, VG 46, and VG 68. The choice of hydraulic oil depends on the operating conditions, such as temperature and pressure, as well as the specific requirements of the equipment.

Key properties of hydraulic oils include:

Viscosity: Hydraulic oils must have a consistent viscosity to ensure proper flow and power transmission under varying loads and temperatures.

Pour point: The pour point is the lowest temperature at which the oil will flow. A lower pour point is desirable for cold weather operation.

Shear stability: Hydraulic oils should maintain their viscosity under shear stress to prevent leakage and ensure consistent performance.

Oxidation stability: Hydraulic oils are susceptible to oxidation, which can lead to the formation of sludge and varnish. High-quality oils are formulated to resist oxidation and maintain their performance over time.

Hydraulic oils are typically mineral-based or synthetic, with synthetic oils generally offering better performance and longer life. They are designed to be compatible with the seals and other components in the hydraulic system, ensuring reliable operation and minimizing maintenance requirements.

Proper maintenance of hydraulic oils, including regular monitoring of viscosity, contamination levels, and temperature, is essential for the longevity and performance of hydraulic systems. Contamination, such as water or dirt, can significantly degrade the performance of hydraulic oils and lead to system failures. Therefore, it is crucial to use clean, dry hydraulic oil and to follow recommended maintenance schedules to ensure the safe and efficient operation of hydraulic equipment.