Due to the unreasonable design of the hydraulic system, the hydraulic system will be heated.
Due to the unreasonable design of the hydraulic system, the hydraulic system will be heated. The specific causes and solutions for fever are detailed in the following five points:
1. The oil number of the hydraulic oil is improperly selected, which may cause the hydraulic system to heat up. When the oil temperature is low, the system works normally. However, after the system works for a period of time, the oil temperature rises and the viscosity of the hydraulic oil decreases, causing the internal leakage of the system to increase, and the increase of the leakage causes the oil temperature to rise. A vicious cycle of oil temperature is formed.
The solution is to select the hydraulic oil of the appropriate viscosity according to the load of the system and the normal working temperature requirements.
2, the fuel tank design is unreasonable, so that the heat dissipation effect of the hydraulic system is reduced. The main function of the heating oil tank is to store hydraulic oil, but it also has the functions of heat dissipation, precipitation of impurities and separation of moisture.
The fuel tank design is unreasonable, mainly in two aspects:
1The volume of the fuel tank is too small, and the volume of the fuel tank is generally about twice the flow of the hydraulic pump. Therefore, the heat dissipation area and oil storage capacity of the fuel tank are small;
2 Some fuel tanks are unreasonably designed in structure, the oil suction pipe and the oil return pipe are close, and there is no partition in the middle, which shortens the cooling circulation of the oil in the oil tank and the path of sedimentation impurities, and even causes most of the oil return. Directly enter the suction pipe, so that the heat dissipation effect of the fuel tank is reduced and the oil temperature is increased.
The solution is: increase the volume of the fuel tank properly, so that the volume of the fuel tank is (1125~115) Q, and increase the distance between the suction pipe and the return pipe. The partition between the suction and return pipes should be provided to ensure the fuel tank. The heat dissipation power that should be available.
3. The heat dissipation flow is small, and the installation position of the cooler is unreasonable, which reduces the heat dissipation capability of the system. There are two types of cooling methods: air cooling and water cooling. Users can choose according to the actual situation, but generally use more air cooling. Some need to consider the pressure requirements of the cooler, set the cooler on the oil return road of the mixing system, and only cool the oil of the stirring system. Because the flow rate of the stirring system is small, the cooling effect of the whole system is poor, and the system is heated. .
Solution: First, an independent cooling circuit can be used to improve the cooling effect. The second is to set the cooler on the total oil return road of the system to increase the heat dissipation flow and improve the cooling effect.
4. Improper selection of hydraulic components causes the system to heat up. The hydraulic system is generally a high-pressure and high-flow system. If the hydraulic components in the system are mainly unreasonable for the selection of the reversing valve, the relief valve and the sequence valve, the large flow requirement cannot be met, so that the flow rate of the valve port is used during use. Too high, causing a large pressure loss and raising the oil temperature.
Solution: When designing the hydraulic components in the design of the hydraulic system, the components must be selected according to the highest working pressure of the hydraulic components, the maximum flow rate passed, and the required pressure and flow adjustment range. Loss of mouth pressure, thereby reducing system heating caused by unreasonable selection of hydraulic components.
5, pipeline design, installation is unreasonable, resulting in large pressure loss, so that pressure energy can be converted into heat energy in the design of the hydraulic system, the design and installation of the pipeline can not be ignored, the pipeline diameter should be strictly according to its working pressure and flow The design is carried out to avoid the tube diameter design being too small, causing the flow rate to be too high, and the pressure loss along the path is too large, causing heat. At the same time, it should also pay attention to the installation of the pipeline, not only to have a neat appearance, but also to avoid the accumulation of pipelines and the sharp turn of the pipeline, affecting the natural heat dissipation of the pipeline or causing excessive heat loss due to excessive partial pressure loss.
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