Chelyabinsk, Chelyabinsk, Russian Federation
It was revealed that installation of hydroaccumulator provides oil feed of bearings of the rotor with regular parameters of giving and pressure of oil at sharp reduction of turns of crankshaft under engine overloads, but by 30-40 % increases rotor coast, predetermining the increase in dimensions of the hydroaccumulator. In the braking mode of air flow, the brake damper increases the braking torque, which determines the deceleration of the rotor of the turbocharger and shortens the run-up time of its rotor to a value lower than the duration with free run-out of the rotor with a regular engine lubrication system. Operational tests of 15 K-700A tractors with YaMZ-238NB engine equipped with TKR-11-238NB turbocompressors were carried out. At the research with regular lubrication system of 95 % confidential interval made 3701; 4074 the motor-h. After the in-stallation of autonomous lubricating and braking de-vice in the lubrication system of a turbocharger, the mean time between failures exceeds 1.85 times the average operating time for failure with a regular lubri-cation system.
engine, turbocompressor, greasing, reliability, operating time, failure
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