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Xuzhou Futai Construction Machinery Trading Co., Ltd.

Tel: 0516-85756970
Mobile: 18605166872 (manager Li)
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Address: Xiliangyuan Hotel North, Tongshan District, Xuzhou City, Jiangsu Province (north of national highway 310)

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General knowledge of loader accessories (IV)

2022-05-16 16:18:06
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As we all know, the oil temperature of the loader's hydraulic system is between 35 ℃ and 55 ℃. Once the temperature rises to more than 60 ℃, the performance of the hydraulic system will be greatly reduced. Machine tool equipment failures continue to occur. The ideal working oil temperature of the hydraulic system is between 45 ℃ and 50 ℃. The reason is that the hydraulic system is designed according to a selected pressure oil viscosity, but the viscosity will change with the oil temperature, thus affecting the working components in the system, Such as oil cylinder, hydraulic valve, etc. Next, the manufacturer of XCMG accessories will introduce the precautions for the selection of hydraulic oil.
1. Hydraulic oil has good anti emulsification and anti foaming properties. Demulsibility refers to the ability of oil mixed with water and stirred to become emulsion and water separated from it. Anti foaming property refers to the ability to separate bubbles from oil when air is mixed into the oil and stirred to form emulsion. After mixing with water or air, the volume modulus of the oil is reduced, the compressibility is increased, the hydraulic components of the loader are slow, and are prone to impact and vibration.
2. Good anti-oxidation safety shall be considered when selecting hydraulic oil for loader. Anti oxidation safety refers to the ability of low resistance to react with oxygenates when the temperature of hydraulic oil rises. The practice shows that the chemical reaction speed of hydraulic oil increases about twice when the oil temperature increases by 10 ℃. The hydraulic oil with good anti-oxidation stability is not easy to oxidize and deteriorate after being used in the loader for a long time, which can ensure the normal circulation of the hydraulic oil.
3. Proper viscosity of hydraulic oil. Viscosity refers to the frictional resistance between molecules when oil flows. When the viscosity of hydraulic oil is too high, it will increase the transmission resistance in the pipeline, increase the energy loss during the operation of the loader of China first heavy industry, increase the no-load loss of the main engine, increase the temperature rise quickly and the operating temperature is high, and "cavitation" may occur at the oil suction end of the main pump; If the hydraulic oil viscosity of the loader is too small, good lubrication conditions cannot be guaranteed, which intensifies the wear of parts and the increase of system leakage, resulting in the decline of the volumetric efficiency of the oil pump. The specific application depends on the working pressure, working temperature and the moving speed of the actuator of the hydraulic system of the small forklift.
The above is the information compiled by the manufacturers of construction machinery parts. I hope it can help you.

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