Studuing Lubrication System of Turbocompressor Rotor with Integrated Electronic Control

Abstract

Forcing of engines together with positive properties – uprating within 5–50 % has a considerable drawback, i.e. the decrease of its service reliability. The performed analysis of literature points at a considerable increase in the number of turbocompressor failures. The main causes are as follows: nonobservance of the startup and shutdown modes by the operators; breach of the maintenance standards; high randomness of the load modes of 10-150%. The operability and increase of the failure-free performance of the turbocompressor and its elements can be achieved by the application of the suggested lubrication system of the turbocompressor internal combustion engines. The use of the lubrication system of the turbocompressor internal combustion engines with an autonomous lubrication-brake device and an autonomous control system of the turbocompressor rotor braking prevents coking of lubricant oil residues in channels of the turbocompressor lubrication system in case of a sudden (emergency loaded) shutdown of the internal combustion engine in the mode of the turbocompressor rotor rundown, and implies a regulated supply (by the volume, time and temperature) of oil in the turbocompressor bearing, as well as a regulated (by temperature) supply of the air compressed by the turbocompressor pump wheel to the inlet of the turbocompressor turbine wheel, which reduces the temperature of the turbine parts with the temperature of 600–700oС, wherein the service reliability of the bearings, rotor, body and the turbocompressor in general is increased. The application of engineering samples of the autonomous lubrication-brake device on car-and tractor and combine machine diesel engines of vehicles allows decreasing the number of turbocompressor failures by 10–15 %. The estimated economic effect comprises 50–80K rubles per season of operation of mobile energy-converting machinery with the increased unit capacity.