[Proficient in hydraulics] - What is the cause of hydraulic fittings?

According to statistics, 70% of hydraulic components are related to hydraulic oil, and about 90% of this 70% is caused by impurities. The main contents of the hydraulic oil inspection are the following: the cleanliness, color, viscosity and consistency of the hydraulic oil; in addition to the smell. When hydraulic oil flows from the high pressure side to the low pressure side flow without mechanical work, heat is generated in the hydraulic system. If the temperature of the hydraulic oil is too high, the expensive seal will deteriorate and the oil will oxidize to failure, which will cause corrosion and deposits, which will block the wear of the orifice and the accelerating valve. Excessive temperature will cause the valve and pump to be stuck. High temperature hydraulic parts can also cause safety problems. With the inspection of the oil temperature in the tank, it is sometimes possible to eliminate system failures before serious hazards occur.

In most systems, the relief valve is the main source of heat, and the flow through the pressure relief valve of the hydraulic fitting is too large to cause another cause of heat. Since the low efficiency is related to the energy loss, it is known whether there is a problem of low efficiency by checking the working temperature. For the hydraulic system, the control of the pollutants in the oil is a major task, and the sources of the pollutants of the hydraulic components are mainly The following aspects:

1. Enter with new oil.

2. Inside the system during the assembly process.

3. Enter with the surrounding air.

4. The internal wear of the hydraulic components.

5. Enter through a leaky or damaged seal.

6. Brought in during the inspection.