Gear rotary pumps for hydroficated machines and petrochemical industry
The article considers gear rotary pumps for various technological applications, which are widely used in different technical units, such as road or hoisting machines, petrochemical industry units and so on. Their main advantages are design simplicity, compactness, reliability and comparatively high efficiency, ability to use units at a high rotation speed of the drive shaft (to 100 sec <sup>-1</sup>). Nevertheless, gear rotary pumps have some disadvantages such as sensitivity to mechanical impurities in the pumped power fluid; pulsation of the supercharge operating pressure and irregularity of power fluid supply; vibroacoustic hyperactivity (there is a clear connection between gear pumps pulsation performance of and their acoustic noise level). One of the ways to ensure efficient performance of hydroficated machines and to increase its efficiency is to improve the design of these unites. The article gives a detailed analysis of scientific and technical literature and patents that reveals contemporary trends in gear rotary pumps designs development, namely design simplification; serviceability and maintainability; reduction of weight, overall dimensions, noise and vibration making; reliability, operation life, mechanical and volumetric efficiency enhancement.