What's wrong with the high temperature of hydraulic oil?

Hydraulic oil is very commonly used in daily life and is usually used in construction machinery such as excavators. Therefore, it is very common for the hydraulic oil temperature to be too high. Therefore, it is particularly important to find a scientific and effective cooling method. Regularly cleaning the radiator, reasonably selecting hydraulic oil, adjusting the system pressure according to the standard, preventing pipe blockage and oil leakage, and timely repairing worn hydraulic components have good results in lowering the hydraulic oil temperature. Friends in need can give it a try.

1. The main reason for the high temperature of hydraulic oil

1. Improper oil selection. If the viscosity is too high, the internal friction will increase; if the viscosity is too low, the internal leakage will be serious, the lubricity will be reduced, and the power loss will increase. Both of these situations will cause the oil temperature to be too high.

2. The cooling water pressure is too low and has no cooling effect.

3. The oil pump, motor or bearing is damaged, worn and heated.

4. Too much or too little oil, resulting in a large number of bubbles in the oil.

2. Several cooling methods

1. Clean the radiator regularly

Whether it is an excavator or construction machinery, the working environment must be very poor, especially when there is too much dust. At this time, the outer surface of the radiator will absorb a lot of dust, which will seriously affect the heat dissipation effect of the radiator. The radiator should be cleaned regularly to remove dirt and maintain good heat dissipation performance.

2. Reasonable selection of hydraulic oil

Hydraulic oil should be selected according to the brand recommended by the manufacturer and the working environment and temperature factors of the machine. For some machines with special requirements, special hydraulic oil should be selected. In the winter in the north, it is best to use low-condensing hydraulic oil. When hydraulic components and systems are inconvenient to maintain, anti-wear hydraulic oil should be used.

3. Adjust system pressure according to standards

The components used for pressure regulation are mainly overflow valves and safety valves: in the fixed displacement pump system, the oil supply pressure of the hydraulic pump is regulated by the overflow valve; in the variable displacement pump system, the safety valve is used to limit the maximum pressure of the system to prevent system overload. The pressure value of the control valve must be adjusted strictly according to the standard to reduce energy loss.

4. Prevent pipeline blockage and oil leakage

The oil inlet filter and oil inlet pipe should be inspected and maintained regularly to prevent pipeline blockage and obstruction of oil flow. Tighten all joints of the oil pipes in time, check the oil seals of the pilot pump and main hydraulic pump drive shaft regularly, and replace damaged oil seals in time.

5. Timely repair of worn hydraulic components

Hydraulic pumps and motors should be checked regularly, and severely worn hydraulic components should be repaired in a timely manner.