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Three main sources of contamination in lubrication systems - Spectro Scientific
Contamination control can be divided into two main parts: ingress prevention and disposal. Since none of the methods alone is sufficient, both should be considered as a good pollution control strategy.
To prevent contaminants from entering, it is very important to understand the possible sources of contamination and their penetration into the system. External contaminants can be introduced through any penetration point, such as a breather, seal, port, hatch or other inlet.
Although most people think that pollutants come only from an external source, they can also come from within. In addition, you should not discount the probability of human interaction with the system as a source of pollution. Thus, we are dealing with three sources of oil pollution:
- pollutants entering the system,
- pollutants formed inside it,
- and pollution created by human interaction.
Contaminants can enter the system due to poor seal design, worn seal materials, and operating or environmental conditions. External impurities can penetrate through damaged shaft seal points. For hydraulic components, windshield wiper seals and rods will inevitably be the source of this problem, since contaminants damage the seal materials during prolonged use. Therefore, it is necessary to control how the amount of contaminants in the oil in order to replace these seals in time, thus preventing further deterioration of the oil condition and destruction of the mechanism. For this purpose, as a rule, particle counters are used, such as the particle counters of the LNF series, which are included in the Minilab 53 and Minilab 153 mini-laboratories. They allow you to track the accumulation of polluting particles, classify them and control their size.
Any breathable free space also provides the possibility of road dust, soil, stone dust, moisture or other contaminants entering the system. Even if the machine is equipped with a suitable breather, if in hatches, ports, etc. there are gaps, air is more likely to be ''inhaled'' in these areas with the least resistance and lead to oil pollution. Therefore, it is therefore necessary to monitor the timely addition of oil, as one of the ways to combat its pollution.
Over time, any oil will oxidize or thermally decompose and, if not replaced on time, the components of the lubricant can turn into abrasive contaminants. This can lead to oxidation of insoluble substances, sediment, loss of additives, etc. Rust is a symptomatic contaminant when water enters. This can lead to corrosion of iron and the formation of its oxides. Soot is a small insoluble carbon that often forms as a result of the thermal decomposition of hydrocarbons. To control these types of contamination, it is most advisable to use the 1100 IR analyzer, the main instrument of the Minilab series minilabs. It identifies pollutants such as water, oil oxidation, glycol and fuel.
Fibers from seals, hoses, filters, or other materials can also leave contaminants to enter the system.
In addition, friction can lead to the formation of particles as a result of adhesive, abrasive or fatigue wear. In this case, it will be useful to use the 6000 series magnetometers that are part of the Minilab 33 mini-laboratories.
When oil or grease is added to the system, the new grease is often not clean and may contain various potential contaminants. Similarly, since machines require internal work, such as replacing bearings and seals, the fluid reservoir can be opened. Processing chips, welding sprays and sealants or adhesive materials are all examples of debris that may remain after human interaction with equipment. Therefore, all equipment maintenance work should be properly monitored and regulated in terms of preventing contamination.
Training courses on the topics of NO-2010 ''The concept of'' Reliable equipment ''(developer Romanov Roman Alexandrovich, 921-757-90-51) and'' TOP-105 Fundamentals of the theory of lubrication of machines. Tribodiagnosis. The oil analysis method under operating conditions ”is carried out within five working days and lasting forty academic hours.
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