Mathematical simulation of the oil-free screw vacuum pump operation

The paper considers options in mathematical and numerical simulation of the oil-free screw vacuum pumps, their advantages and disadvantages. It substantiates the necessity to create a mathematical model of such pump working process. The most frequently encountered types of rotor profiles of the screw vacuum pump are described. The paper presents a block diagram of the mathematical model and equations underlying it. Main assumptions used in the mathematical model creation are provided. Computation method of heat exchange in the screw vacuum pump flow part is considered. Mathematical simulation makes it possible to obtain main characteristics of the screw vacuum pump; they are compared with those experimental. To define more exactly the mathematical model, numerical and natural experiments were conducted. The paper establishes that the mathematical model makes it possible to predict the screw vacuum pump characteristics quite accurately resulting in its possible introduction in design and experimental-design work on creation of the new oil-free screw machines.
EDN: MMOPJB, https://elibrary/mmopjb

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