In the hydraulic transmission of the grader, the hydraulic oil can also play a sealing role in some components. In order to ensure the reliable, effective and economic operation of the hydraulic system, there are requirements for the quality of the hydraulic oil. The taxi staff of the cold regeneration machine will introduce it to you now.
1. Good viscosity temperature characteristics. Viscosity temperature characteristic refers to the degree to which the viscosity of oil changes with temperature rise and fall, usually expressed by viscosity index. The greater the viscosity index is, the smaller the decrease of oil viscosity in the hydraulic system with the increase of temperature, so as to ensure that the internal leakage of the hydraulic system is small. The viscosity index shall not be less than 90.
2. Good shear stability. In order to improve the viscosity index of the oil, high molecular polymers such as polymethylmethacrylate and polyisobutylene are often added to the oil. These substances have long molecular chains. When the oil flows through the slit of the hydraulic element, it will be subject to great shear, which will break the molecular chains and reduce the viscosity temperature of the oil.
3. High chemical reaction stability, not easy to oxidize and deteriorate. Practice has proved that the chemical reaction speed of the grader will increase about twice every 10 ℃ increase in the oil temperature of the grader. The hydraulic oil with good oxidation stability is not easy to be oxidized and deteriorated after being used for a long time, which can ensure the normal circulation of hydraulic oil.
4. Viscosity. The viscosity represents the friction resistance between molecules when oil flows. When the viscosity is too high, the oil flow resistance is large, the energy loss is large, and the system efficiency is low. At the same time, the no-load loss of the main engine becomes larger, the temperature rises quickly, and the working temperature is high, and the "cavitation" phenomenon is easy to occur at the oil suction end of the main pump; When the viscosity is too small, the good lubrication condition of hydraulic components cannot be guaranteed, the wear of components will be increased, and the efficiency of hydraulic system will be reduced.
5. Good demulsibility, not easy to produce foam. The demulsibility refers to the ability to prevent water and emulsion from separating from oil when water is mixed in the oil and stirred; The anti foam property refers to the ability that the emulsion and bubbles will not form after the oil is mixed with air and stirred, which will lead to their separation from the oil.
The above are some requirements on the performance of the hydraulic oil of the grader, and I hope they can be helpful to your use. Our company is a professional machinery leasing company. If you need, you can contact us http://www.tclqgc.com 。
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