The maintenance of hydraulic system mainly includes the following aspects:
Maintenance of hydraulic oil: Regularly check the viscosity, acid value, water content and impurity content of hydraulic oil to ensure that they are within the range required by the equipment. The viscosity change of hydraulic oil in normal operation should not exceed 10%-15% of the initial viscosity. If the viscosity decreases too much, it may be that the oil is contaminated or the oil temperature is too high, causing deterioration; if the viscosity increases, it may be mixed with incompatible oil or oxidative polymerization. In addition, the hydraulic oil should be replaced regularly, and the oil change cycle should be determined according to the working intensity and environmental conditions, generally between 3-6 months and 1-2 years.
Maintenance of hydraulic components: Regularly check the working status of the hydraulic pump, including sound, vibration and temperature, to prevent wear of internal parts and air inhalation. Check the sealing condition of the pump, replace the seals regularly, and ensure that the oil suction port is unobstructed. For hydraulic valves, clean them regularly to remove dirt and impurities to prevent the valve core from getting stuck or the valve port from getting blocked.
Control of oil temperature and oil quality: Install an oil temperature monitoring device to monitor the oil temperature in real time. The ideal working oil temperature is generally between 30-55℃. When the oil temperature exceeds 60℃, the oxidation rate of the oil will accelerate and the service life will be shortened. Cooling devices such as air-cooled or water-cooled coolers can be used to control the oil temperature.
Inspection of pipes and joints: Check whether the pipes and joints are leaking, damaged or loose, and clean or replace the oil filter regularly to prevent blockage. Ensure that the pipes and components are properly installed according to the installation diagram and circuit diagram, and avoid using inappropriate sealing materials.
Prevent impurities, moisture and air from entering the system: Keep the system clean and prevent contaminants from entering the oil tank. Use a system filter or a filter truck with a precision filter device to refuel. Prevent moisture and air from entering the hydraulic oil to avoid "cavitation" and mechanical wear.
Other maintenance measures: Clean the outside of the hydraulic system regularly to prevent dust and dirt from entering the system. Regularly remove bubbles in the system to ensure the normal operation of the system. Monitor the pressure and temperature of the system to ensure that they are within the normal range.
