The Modengy company have been closely cooperating with many research universities of Russia and of the CIS countries during the entire period of its activity.
As a part of joint work with the research university that develops the petal gas-dynamic bearings for the space-saving energy machines, MODENGY anti-friction solid-film coatings were applied onto the working surfaces of the parts.
The principle of operation of the petal gas-dynamic bearings is based on forming an air wedge which the energy plant shaft is ‘floating’ on. Thin resilient metal plates form the bearing carrying surface.
Value of developing such bearings is in functioning without using any renewable lubricating materials what enables to operate them at very high temperatures increasing productivity of micro-turbine plants. Such bearing type also has high load-carrying capacity, stabilizing properties, no wear in the operating mode of the micro-turbine.
Efficient gas lubricant is provided when the shaft achieves high rotation speeds where the air wedge completely separates the shaft’s and the bearing’s surfaces.
One of the important requirements towards providing operability of the petal gas-dynamic bearings at their development and production is applying anti-friction coating with low friction coefficient onto the work surfaces of the petals in order to prevent the parts from wearing within transitional operating modes of the energy plants, that is at the moments of starting-stopping when a steady gas wedge has not formed yet.
MODENGY 1014 and MODENGY 1009 anti-friction solid-film coatings applied onto the work surfaces of the plates at the Modengy Engineer Center meet the requirements of the developers of the petal gas-dynamic bearings, and enable to effectively reduce parts wear.
They form a thin lubricating layer on the plates that reduces friction, and prevents damages from forming at contact between the petals and the shaft surface as well as provides fast forming of the air wedge at turbine transition to the operating mode.
Use of MODENGY anti-friction solid-film coatings provides efficient and long operating of the micro-turbines petal gas-dynamic bearings under conditions of the ultrahigh speed and pressures.