DEVELOPMENT OF TECHNOLOGY OF DESIGNING AND MANUFACTURING OF TURBOKOMPRESORA WORKING WHEELS
Keywords:
computer simulation, turbocharger impeller, design technology, geometrical modeling, areas of normal sections of the blade, Computer Numerical Controlled Lathe MachineAbstract
In this paper, we propose a technique for forming a computer geometric model of a turbocharger impeller with predefined geometric characteristics developed for the use in the department of the chief designer of limited liability company Melitopol Plant of Turbochargers. This will allow creating geometric models of products that are limited by complex functional surfaces. The method is based on the use of the method developed by us, which allows improving the dynamic qualities of the interblade channel by optimizing the schedule for changing the areas of the normal cross sections of the interlop channel. The cross-sections have been corrected by changing the shape of the generating lines of the turbocharger cover and the impeller hub. The functional surface of the blade of the wheel is formed on the basis of the frame, the linear elements of which according to the working drawings are given by an ordered array of points. Providing a second order of smoothness and monotonous variation of differential geometric characteristics along the lines forming the surface skeleton prevents the occurrence of secondary flows within the interlop channel and contributes to the laminar nature of the flow around the blade surface by the medium. The technology for processing the functional surfaces of the impeller on a Computer Numerical Controlled Lathe machine has been developed. The initial data for the development of the control program is the generated geometric model of the product. The technology provides for the manufacture of the impeller on a five-axis machine and ensures the accuracy of the surface treatment that satisfies the operating conditions of the turbocharger. The impeller part obtained as a result of machining on a Computer Numerical Controlled Lathe machine is used as input data to create a "reverse" model and a mold for making impellers. As a result of the studies proposed in the work, the turbocharger output increased by 6.9%.
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