It is important for concrete pump truck to choose the correct grade of hydraulic oil:
The main function of the tank is to store hydraulic oil. It also has the function of heat dissipation, precipitation impurities and water separation. Because the concrete mixing pump truck is a mobile hydraulic equipment, the volume of the oil tank is generally about twice the flow of the hydraulic pump, therefore, the heat dissipation area of the oil tank and the amount of oil storage is too small, will affect the heat dissipation of the equipment, it will reduce the heat dissipation effect of the hydraulic system of the pump truck, resulting in the system heating.
Some concrete pump truck oil tank in the structure of the design is not reasonable, suction pipe mouth and return pipe mouth is close, and there is no partition in the middle, so as to shorten the cooling cycle and precipitation of impurities in the oil tank path, and even cause most of the return oil directly into the suction pipe, so that the heat dissipation effect of the tank is reduced, oil temperature rise. The solution is to appropriately increase the volume of the oil tank of the pump truck, and try to increase the distance between the suction pipe mouth and the return pipe mouth, suction and return pipe should be set up between the partition, in order to ensure the heat dissipation power of the oil tank.
The fluidity of different grades of hydraulic oil is not the same, the higher the viscosity of hydraulic oil, the more heat generated by friction when working. Therefore, the hydraulic oil label used by the pump truck is also strictly controlled.
At present, most pump truck brands are using no. 46 anti-wear hydraulic oil. At the same time, different grades of hydraulic oil can not be mixed, which will also lead to changes in the viscosity of hydraulic oil. After the oil temperature rises, it will in turn reduce the viscosity of hydraulic oil, resulting in its failure to meet the viscosity requirements of normal work. Therefore, it is very important to choose the correct grade of hydraulic oil. At the same time to prevent hydraulic oil temperature rise, damage to the system.
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