Revisiting the selection of the optimal axial end clearance in the rotary vane pump with semi-open impellers

At this stage of hydraulic machinery construction development there is a principle that for the vehicles with similar characteristics the common value of the axial end clearance between the impeller and the branch connection casing is accepted. However, under this approach they do not take into account the fact that the axial end clearance optimal for one vehicle is not optimal for another one. For visual reference and resolving this problem this article carries out the dispersion of two design values (the rotational frequency and the number of blades) by means of LP-tau method and performs the search of the optimal axial end clearance under various combinations of these two parameters. We define the value of the optimal axial end clearance by the criterion of ensuring the minimal energy losses.

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