How to deal with hydraulic oil at high temperature and getting black with bubbles?
June 27, 2022
There is a hazard of bubbles in hydraulic oil 1. Machine action abnormal: In short, if there is a bubble in the hydraulic oil, the first impact is the transmission efficiency. The more straightforward talk about the construction action of the machine will appear abnormal! 2. Symphony of hydraulic system: If the machine can obviously hear the large pump that is different from normal construction in the cab, it is likely that the bubbles increase the vibration and noise generated by the system! 3. High temperature of hydraulic oil: Many machine owners have doubts, why is the high temperature failure of the emergency hydraulic oil at the end of the machine? In fact, what is chaotic is the bubbles walking in hydraulic oil! When these bubbles travel through high -pressure areas, they will quickly be compressed from the normal pressure state, causing the local temperature to rise suddenly. The long oil will deteriorate under high temperature conditions, which is our common hydraulic oil black! How to check hydraulic oil bubbles? Since the cause of the failure is the bubbles, we also understand the harm of bubbles to the machine, then what we want to understand immediately is how to quickly check and remove these bubbles? 1. First check whether the oil level of the hydraulic fuel tank is lower than the dual -connected pump or the oil inlet of the fuel pump. If the fuel level is low, the air must be in the oil inlet, so at this time, you should immediately add hydraulic oil until the standard oil level, and the air should be discharged through the exhaust valve in time! 2. If the oil level is within the standard range, but there is still air in the oil, then consider the leakage of sealing, you can use the air pressure gauge on the top The pump into the oil pipe, the pilot gear pump in the oil pipe and the shell of the two pumps observe the air leakage point. 3. If there is an air leakage point, you can observe that the air bubbles are discharged from different sizes when the air pressure is injected. Find the leakage place, you can solve the symptoms according to different situations.
Oil temperature of hydraulic oil is abnormally elevated What is high temperature of hydraulic oil? For excavators, when the temperature of the hydraulic oil is 50 ~ 80 ° C, the viscosity and abrasion resistance of hydraulic oil are in the best state, and the work efficiency is the highest. When the temperature of the hydraulic oil exceeds 95 ° C, the efficiency of the excavator decreases, the movement is inaccurate and slow, and the excavator cannot work. Solving hydraulic oil temperature can start with hydraulic oil radiator, hydraulic system, hydraulic oil, and driver operation: Hydraulic radiator is blocked The working environment of the excavator is relatively harsh, soil on sunny days, and there are wipes and insects in spring. The periphery of the radiator of the hydraulic system is easily blocked, which will cause poor heat dissipation in the hydraulic system. Therefore, the hydraulic system radiator should be cleaned on a regular basis, and a layer of dust net is installed outside the radiator. Inside the radiator, after a long time of wear and hydraulic oil carbonizing, some solid impurities will also produce like a water tank. These impurities are accumulated inside the scatter, and in severe cases, the internal pipeline will be completely blocked. Hydraulic system failure When the hydraulic system is high in the hydraulic system, the back pressure valve and the bypass valve should be monitored. If the bypass valve is in a regular open state, or the back pressure valve is closed, the hydraulic oil does not pass through the hydraulic oil radiator through the hydraulic oil radiator Cooling directly back to the hydraulic oil tank will cause the hydraulic oil temperature to be too high. The selection of hydraulic oil types is unreasonable Symatic oil with appropriate viscosity can reduce frictional losses. In summer, hydraulic oils with slightly viscosity should be selected to reduce internal leakage. In winter, hydraulic oil should be used to reduce pressure loss. The hydraulic oils of different brands and different types of hydraulic oils of the same brand have different basic oils and additives and do not have compatibility. After the hydraulic oil is mixed, the additive will react, causing the additive to fail, and the granular and foam will be generated, which will reduce the efficiency of the hydraulic element such as pumps, motors, and valves. Improper driver operation If the driver's manipulation of the excavator is too fierce and the movement is not coherent, the temperature of the hydraulic system will be too high. In the long -term high pressure state of the hydraulic system, in addition to the power loss of the pump, motor, overflow valve, and pipeline system, the power loss of the balance valve, buffer valve, and single section valve is also very large High temperature of hydraulic oil. When hydraulic oil foam increases, the car is mainly treated and treated in time. It is necessary to find the cause first and not blindly add anti -foaming agents. At the same time, in life, you need to analyze the performance of oil products, such as the release of the air and the anti -foamability of the hydraulic oil. If such problems still occur, you should check the design of the hydraulic oil index and fuel tank.
