Hydraulic Oil Requirements for Underground Loaders

Underground loaders operate in harsh environments and under high workloads. As the core of the machine, the hydraulic system places strict and specific requirements on the performance of hydraulic oil. The key requirements are as follows:

1. Excellent Lubrication Performance
The hydraulic system of an underground loader contains numerous components such as pumps, motors, and cylinders. When running at high speed and under heavy loads, friction and wear occur on contacting surfaces. Good lubrication allows the hydraulic oil to form a stable oil film on these surfaces, reducing friction and wear, lowering energy loss, extending component service life, and ensuring long-term reliable operation of the hydraulic system.

2. Superior Anti-Wear Properties
Underground loaders frequently operate under heavy loads and strong impacts, with hydraulic systems working at high pressure. This requires hydraulic oil with outstanding anti-wear performance, capable of preventing surface wear and scratches on hydraulic components under conditions of high pressure and high-speed friction. This protects critical parts, maintains system pressure and flow, and ensures stable operation.

3. Excellent Oxidation Stability
The underground environment often has high temperatures, and hydraulic oil itself heats up due to friction during operation. At elevated temperatures, hydraulic oil easily oxidizes when exposed to air, producing acidic substances and deposits. This leads to oil degradation, corrosion of components, filter blockages, and reduced system performance. Therefore, hydraulic oil must have excellent oxidation stability to slow down the oxidation process and extend the service life of the underground loader.

4. Good Anti-Foaming and Air Release Properties
During operation, hydraulic oil inevitably mixes with air, forming bubbles. Poor anti-foaming properties allow excessive bubbles to form and accumulate, reducing transmission efficiency and stability, and even causing cavitation damage to components. Good air release performance ensures that entrained air is quickly separated and released, preventing bubbles from harming the hydraulic system.