Quantitative Assessment of the Turbine Flow Generator Parameters Based on the Requirements for Respiratory Systems

The article considers the experience of designing a turbine-type flow generator (also known as "turbine", "blower", "centrifugal fan", etc.) for artificial respirators. The system requirements for such a device have been transformed into the geometric and mechanical parameters of the blower in the form adopted in turbomachinery world. These requirements affect not only the pressure and performance indicators, but also the acceleration time (reaching the required operating mode) and the sound pressure level. Special attention is paid to the choice of aerodynamic parameters of the turbo blower, as well as to the specifics of its operation considering the effect of the electric motor torque on its characteristics. The concept of monitoring the residual life of the motor by a vibration sensor and a resistance thermometer, allowing introducing emergency settings in the algorithm controlling the ventilator, is considered. All this will make it possible more reasonable interpretation of the solutions and products presented currently on the market, as well as more detailed considering the specifics of a particular device when developing technical requirement for a blower.

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