How to choose hydraulic oil to prevent pipe explosion? Hydraulic system is an important part of construction machinery, and the selection of hydraulic oil is a key issue. Most of the faults in the operation of hydraulic system are caused by the pollution and improper selection of hydraulic oil, of which improper selection of hydraulic oil is an important aspect. Therefore, the correct selection of hydraulic oil is of great significance to improve the reliability and economy of the operation of hydraulic equipment, extend the service life of the system and components, ensure the safe operation of the equipment and prevent accidents. Causes of pipe explosion of excavator: Tubing aging There are few cases of pipe explosion in the new machine, and the problem of oil leakage and pipe explosion slowly begins after 4-5 years of use, which is actually due to the failure caused by the aging of the tubing. It is usually to replace the damaged oil pipe, in fact, you can consider replacing the whole car oil pipe, which can save the time of stopping after the explosion. Excessive line pressure Hydraulic pipe often burst phenomenon, it is necessary to consider whether the hydraulic system pressure is too large and lead to tube explosion, this situation must first use the pressure gauge to measure whether the corresponding pipe pressure is too large. If the pipe pressure is too large, check the corresponding components such as the relief valve and adjust the pressure to the appropriate level. High frequency vibration Hydraulic pumps, motors and other devices will have vibration when working, this high frequency vibration can not be completely eliminated, long-term abnormal vibration will lead to fatigue and wear of hydraulic tubing. Therefore, always check the clamp and protective sleeve of the hydraulic pipe. If the hydraulic oil is insufficient, there will be suction phenomenon, but also cause a lot of vibration.
Hydraulic oil high temperature Hydraulic oil often high temperature will burst pipe failure, in the daily work of the excavator must pay attention to whether the hydraulic oil temperature is too high. High temperature will not only affect the oil pipe, but also affect the service life of the hydraulic components. Contact oil Most of the external hydraulic pipes have a certain corrosion resistance, but the long-term contact of rubber products with oil will make the rubber hose deteriorate, resulting in a certain corrosion effect; Try not to let the hose contact these oil products, to keep clean. General rubber tubing long-term contact, soaking in the waste oil products will lead to corrosion, decomposition and aging, and eventually lead to tubing burst. In the selection of anti-wear hydraulic oil need to consider the following aspects: 1. Wear resistance: hydraulic system work, hydraulic oil under high pressure to withstand the hydraulic pump inertia force and system spool friction resistance, as well as the friction resistance of the hydraulic cylinder, so the hydraulic oil should have good wear resistance, to ensure the normal operation of the system. 2. Anti-rust and anti-oxidation properties: hydraulic oil should have good anti-rust and anti-oxidation properties, which can reduce the corrosion and oxidation of the internal parts of the hydraulic system, thereby extending the service life of the system. 3. Anti-foam performance: the hydraulic oil should have good anti-foam performance to avoid pressure instability caused by excessive foam in the oil when working at high speed. 4. Temperature characteristics: the flow performance, viscosity, flow and other characteristics of hydraulic oil are different at different temperatures, so it is necessary to choose suitable hydraulic oil to maintain stable performance at different working temperatures.
