Abstract
Introduction. Gear pumps are one of the main sources of hydraulic energy for hydraulic fluid power of a number of machines for national and special applications. Improving the characteristics of the gear pump of the external gearing is based on a search for the gearing parameters of the gear pump in terms of reducing the overall size while maintaining the value of the working volume set by the customer, which is the subject of the formulation and solution of multicriteria optimization problemsProblem. Improving the characteristics of the gear pump of the external gearing is based on the search for the parameters of the gearing of the gear pump in terms of reducing the overall size while maintaining the value of the working volume set by the customer. In the studies of a number of authors, the problems of reducing velocity and pressure pulsations, optimizing gearing parameters, and determining the geometry of gear pump cavities are separately solved. However, a multicriteria approach to gear pump is absent, which narrows the range of positive results obtained by studying the quality of the developed design.Method. A method for studying the parameter space for a gear pump is proposed. This method makes it possible to work with models of various nature due to the absence of any restrictions imposed on functions, including quality functions (smoothness, continuity), the designer is not required to rank criteria, assign weighting factors, limits and restrictions, it is possible obtaining information about the behavior of the criteria and restrictions in the parameter space under study with the minimum calculation time due to the simplicity of data analysis.The practical results. The mathematical model of the gear pump is improved by introducing the equations of the radial and normal lateral gaps, which increased its adequacy to the full-scale sample. As a result of the multicriteria optimization, the overall dimensions of the pump were reduced by 7% while ensuring a given value of the working volume.
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