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China's mini excavator market is currently in the peak period of infrastructure construction in terms of urban construction, energy and water conservancy, and road transportation. The market demand for mini excavators is increasing year by year, and it has become one of the largest consumption markets in the world. The following is the relevant content Details. The main reason for the high hydraulic oil temperature of mini excavators is that the heat is generated too quickly, the heat dissipation is too slow, and the two are relatively uneven.
1. The interior of the hydraulic oil radiator is blocked or the appearance of the radiator is too dirty, which affects the heat dissipation effect (that is, the radiator cannot work).
2. The hydraulic oil tank lacks hydraulic oil or the hydraulic oil is too dirty, and the hydraulic filter element is clogged, resulting in excessive temperature (if it is not maintained for a long time, the quality of the hydraulic oil will decline, the cycle performance will deteriorate, and excessive heat will be generated).
3. Too much leakage of hydraulic oil in the hydraulic system leads to excessive leakage of hydraulic oil, excessive wear gap of hydraulic parts of each valve core, large amount of heat generated and excessive temperature;
4. The oil return one-way valve is damaged (spring is damaged or the valve is stuck), resulting in no resistance to oil return or direct return of oil without passing through the radiator;
5. False alarms due to circuit system failure, sensor or circuit problems;
6. There is too much internal leakage of the hydraulic pump, and the working device moves slowly, causing the temperature to be too high;
7. Insufficient engine power does not match the hydraulic pump. The insufficient oil supply of the hydraulic pump increases the load of the hydraulic system, increases the resistance of the working device, and causes high temperature;
8. For large and mini excavators, the hydraulic system has a separate hydraulic fan motor, hydraulic fan pump and hydraulic fan solenoid valve. The damage of these three components will cause the hydraulic pressure to be too high.
Classification of mini excavators
1. According to the driving method, there are internal combustion engine driven mini excavators and electric mini excavators. Electric mini excavators are mainly used in flammable and explosive places such as plateau hypoxia and underground mines.
2. mini excavators are divided into crawler-type mini excavators and wheel-type mini excavators according to the walking mode.
3. mini excavators are divided into hydraulic mini excavators and mechanical mini excavators according to the transmission mode. Mechanical mini excavators are mainly used in some large mines.
4. mini excavators can be divided into general mini excavators, mining mini excavators, marine mini excavators, special mini excavators and other different categories according to their uses.
5. mini excavators are divided into front shovel mini excavators and backhoe mini excavators according to the bucket.
The front shovel mini excavator is mainly used to excavate the material above the surface, and the backhoe mini excavator is mainly used to dig the material below the surface. The above are all the answers in this article. If you have any questions or suggestions, you can contact us at any time. How to solve the abnormal vibration of mini excavators?