Continued from page 16
The oil must then be tested in a full-scale turboshaft engine to evaluate its serviceability and to ensure that engine components are compatible with the lubricating oil. The post-test condition of the engine shall not indicate excessive or unusual deposits, wear or corrosion which are attributed to the test oil.
ASTM D4636: oxidation and corrosion test, 204°C – 72 h
temperatures of up to 160°C, or even more in the valves of the discharge section, especially in case of failure. The generation of carbonaceous deposits has been a matter of concern as it may lead to dangerous auto-ignition or valve sticking phenomena. Esters may be used to deliver added durability and ensure cleanliness. In addition, their low volatility will contribute to the production of cleaner compressed air.
Thermogravimetry – Nitrogen, 250°C
PAO 4
Nycobase® ISO VG 15
Diester
Nycobase® ISO VG 22
Neopolyol Ester
Extension to high performance industrial applications Aviation is not the only area of lubrication showing such severe requirements. In industrial lubrication too, equipment may operate in extreme conditions, some of which are close to those found in jet engines. Consequently, it is possible to utilise the acquired know-how and technologies developed for the design, production and formulation of neopolyol esters to demanding industrial applications. The most obvious illustration of that is the use of jet engine oils in ground turbines for power generation, especially those that are aero-derivated.
High temperature chains and conveyors are typically found in furnaces, ovens or dryers used in the production of construction materials like glass fibers or cement, laminated particle boards and flooring, plastics, ceramics, stretch film, and even baked products, where temperatures exceeding 300°C may be found. Lubricants showing insufficient resistance to heat may evaporate, causing lack of lubrication, or decompose, leaving sticky residues leading to mechanical failures, fire outbreaks, potential production downtime or increased maintenance costs. Neopolyol esters, especially when combined with oligomer anti-oxidants developed for aviation lubrication, deliver reduced volatility and excellent deposit control, resulting in cleaner operation, reduced downtime, less consumption, and added fire safety. In high compression rate air compressors,
18 LUBE MAGAZINE NO.143 FEBRUARY 2018
Finally, in some passenger car engines, turbochargers may submit the engine oil to extreme temperatures too. The TEOST 33C oil tests evaluate the ability of the oil to resist such temperatures in the turbocharger area of the engine, while generating minimal deposits, through oxidation cycle using temperatures ranging from 200 to 480°C. High performance esters, in addition to their contribution to reduced volatility and friction, are able to improve engine cleanliness.
However, the one aspect of neopolyol esters that has not been taken advantage of in the aviation industry is their excellent environmental profile, combining biodegradability, renewability and non-toxicity features; such specific properties are being increasingly exploited in low environmental impact, high performance industrial products.
Will we see, in the future, equipment manufacturers of the aviation industry willing to make the most of neopolyol esters and their unique technical performance/environmental profile combination?
LINK
www.nyco.fr/en/
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76
