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Mathematical model for studying volumetric losses of a three-rotor hydraulic machine with

bilateral lantern meshing: It has been selected a suitable mathematical model for studying of volumetric losses of a new type pump with bilateral lantern meshing that takes into account the influence of its main geometrical dimensions, operational parameters and properties of the fluid on the volumetric efficiency of the pump. For this purpose, the processes that occurring inside the pump have been examined, the quantities which in the fullest extent characterize the variation of the volumetric efficiency also have been defined and with the aid of the theory of similitude and dimensionalities analysis are derived their criteria of similitude. The geometric dimensions of the pump and especially their complexes impacting on the volumetric efficiency, are united in a common geometric factor valid for this class of pumps.

Key words: gear pump, lantern meshing, mathematical model, volumetric efficiency, main indicators, theory of similitude, dimensionalities analysis.

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:

2015 – –

[1].

86-92, ISSN 0861-9721 [2].

[3].

[4]. [5].

[6].

[7].

-

[8]. -52, ISSN 1314-2550.

[9]. [10].

--73.

[11].

[12]. -6.

-582, e-mail: nikolaev@uni-ruse.bg; -

-580, e-mail: gspopov@ uni-ruse.bg; -

- -mail: tujarov@uni-ruse.bg;

- -mail: tujarov@uni-ruse.bg;