Abstract
In order to study the tribological properties of different hydraulic oils under different motion modes, four-ball tester and block-on-ring tester were used to optimize the test parameters and evaluate performance of commercial hydraulic oils. The results showed that the optimized test methods under the form of point and line motion modes can better evaluate the extreme pressure and anti-wear performance of hydraulic oi. There was a negatively correlation between extreme pressure and anti-wear performance; this method can provide a basis for the reasonable selection of lubricating oil in hydraulic system.
Highlights
As an important part of the hydraulic system, hydraulic oil is the medium of energy transfer, conversion and control of auxiliary valves, and plays the role of cooling, cleaning, lubrication and sealing
The hydraulic system of construction machinery has been developing towards high pressure, high speed, high power, high performance, high precision, large flow and system control to a more complex and flexible direction [1,2,3]
In order to effectively ensure the normal operation of hydraulic components under the harsh conditions of high pressure, high speed, heavy load and impact, higher requirements are put forward for the extreme pressure and anti-wear performance of the matching hydraulic oil
Summary
As an important part of the hydraulic system, hydraulic oil is the medium of energy transfer, conversion and control of auxiliary valves, and plays the role of cooling, cleaning, lubrication and sealing. In order to effectively ensure the normal operation of hydraulic components under the harsh conditions of high pressure, high speed, heavy load and impact, higher requirements are put forward for the extreme pressure and anti-wear performance of the matching hydraulic oil. The excellent extreme pressure and anti-wear performance of hydraulic oil can reduce the wear of hydraulic components, prolong the service life, reduce the leakage and burst probability, and improve work efficiency [4]. In order to effectively evaluate the extreme pressure and anti-wear performance of hydraulic oil from multiple angles, this paper investigates the tribological properties of point and line motion modes. By using four-ball tester and block-on-ring tester (Timken tester), through reasonable optimization of test parameters and evaluation indexes, the extreme pressure and anti-wear performance of hydraulic oils of different quality grades can be effectively distinguished and controlled
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