Abstract
The purpose of the article is to describe the design and research of the new Rotrex superchargers of C15 series. In superchargers to ensure high boost pressure and efficiency centrifugal compressor wheel, shockless planetary gear of the original design, a special lubrication-cooling system were used. The article describes the design features of Rotrex centrifugal superchargers and the results of experimental researches of the C15 series supercharger on a motor less stand. The design feature of the C15 series superchargers is compactness and high speed - the compressor wheel speed reaches 200 000 rpm. In a planetary gear, cylindrical rollers on ball bearings are used instead of gear satellites. The gear ratio from the shaft of the stand motor to the shaft of the compressor wheel was 43. Tests of the C15-20 supercharger are performed in static modes. Characteristics of the consumer of boost air were modeled with special washers with minimum diameters of 10,1 ... 14,0 mm. The maximum overpressure of 1.1 ... 1.3 MPa was achieved at a flow rate of 460 ... 250 kg/h, respectively. The tests confirmed the efficiency of the stand for gas-dynamic research of centrifugal compressors, the electronic control system of the electric motor current frequency reliably worked. Characteristics of the C15-20 supercharger, test results confirmed its purpose for spark-ignition car engines. They can be used in combined boost systems of both gasoline engines and diesel engines. KEY WORDS: INTERNAL COMBUSTION ENGINE, BOOST, CENTRIFUGAL SUPERCHARGER, BOOST TESTS
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