The anti-wear performance of semi-synthetic air compressor oil is crucial to the stable operation and service life of the air compressor. Good anti-wear performance can reduce friction between components, reduce energy loss, and extend the maintenance cycle and service life of the equipment. Therefore, it is of great practical significance to understand how to detect and improve its anti-wear performance.
The four-ball tester is a common device for testing the anti-wear performance of compressor oil. In the test, three fixed steel balls and one rotating steel ball are immersed in the oil sample and run under the specified load, speed and time. After the test, the wear spot diameter of the steel ball is measured to evaluate the anti-wear performance of the oil. The smaller the wear spot diameter, the better the anti-wear performance of the oil. This method is simple and intuitive, and can quickly obtain relatively accurate results. It is widely used in laboratories and production quality control.
The Timken tester is also an important detection method. It allows the test ring and the test block to rub against each other in the oil sample under certain load, speed and time conditions to observe the wear of the test block and the test ring and the load-bearing capacity of the oil film. The anti-wear performance of the oil is evaluated based on whether scratches, sintering and other phenomena occur during the test and the load size when the specified wear amount is reached. The Timken test machine method can be closer to the actual working conditions and is of great significance for evaluating the anti-wear performance of compressor oil under high load.
In addition to the above standard laboratory test methods, the test can also be carried out by simulating the working conditions of the actual air compressor. For example, a small air compressor test bench is built to operate under different pressures, temperatures, speeds and other working conditions, and the wear of the components is regularly disassembled and checked, and the content and size of the wear metal particles in the oil sample are analyzed. Although this method is closer to the actual use, it is more expensive and has a longer cycle. It is generally used in the in-depth research and development stage of the product.
Base oil is one of the key factors affecting the anti-wear performance of semi-synthetic air compressor oil. Selecting high-quality base oil, such as a mixture of synthetic hydrocarbon base oil with good lubricity and antioxidant properties and refined mineral oil, can provide a better anti-wear basis for the oil product. At the same time, adjusting the viscosity and viscosity-temperature characteristics of the base oil so that it can maintain a suitable oil film thickness at different operating temperatures helps to improve the anti-wear performance.
Anti-wear additives are an important means to improve the anti-wear performance of semi-synthetic air compressor oil. Common anti-wear additives include zinc dialkyl dithiophosphate (ZDDP), organic molybdenum compounds, etc. ZDDP forms a chemical reaction film on the metal surface, which can effectively reduce the friction coefficient and reduce wear. Organic molybdenum compounds can decompose at high temperatures to generate molybdenum sulfides with lubricating effects, further improving the anti-wear performance of oil products. Reasonable selection and compounding of anti-wear additives can significantly improve the anti-wear ability of compressor oil.
There are various methods for testing the anti-wear performance of semi-synthetic air compressor oil, each with its own characteristics. Its anti-wear performance can be fully evaluated through laboratory testing and simulation of actual working conditions. By optimizing the base oil and adding appropriate anti-wear additives, its anti-wear performance can be effectively improved, thereby ensuring the reliable operation of the air compressor and improving the overall performance and service life of the equipment. In actual applications, it is necessary to comprehensively consider the methods for testing and improving the anti-wear performance according to the specific use requirements and working conditions, so as to select and use the appropriate semi-synthetic air compressor oil.
