Substantiation and development of the procedure for calculating a hydraulic balancing device under condition of minimal energy losses

Here we report the procedure for calculating a hydraulic balancing device from the condition of minimum of energy losses for the accepted value of static characteristic rigidity. The procedure proposed is different from those existing by that its basis is formed by a closed system of equations by the geometric parameters of a hydraulic balancing device, which is obtained from the condition of the minimum of energy losses for the accepted value of statistic characteristic rigidity. In order to determine the energy losses on the node of a hydraulic balancing device, we received calculation formulas for energy losses in the cylindrical and face chokes of a hydraulic balancing device, using an analogy of determiining the energy losses in a cylindrical pipe with round cross section. Results of the work are represented in the form of the given procedure for the calculation of a hydraulic balancing device and proposed mechanism of its realization that make it possible to obtain a unique solution of the closed system of equations for determining the geometric parameters of a hydraulic balancing device. Geometric parameters of a hydraulic balancing device, received in this way, provide for its reliable operation at minimal energy losses on it.The verification of the procedure for calculation and the study based on the calculation procedure from the condition of the minimum of energy losses are performed using the feed pump PE 600-300 (AO "Sumy Plant "NasosEnergoMash", Ukraine). Research results might be used for calculating the nodes of axial load of the rotor of a multistage centrifugal pump under condition of the minimum of energy losses at the accepted value of static characteristic rigidity of a hydraulic balancing device. In the present work we obtained a closed system of equations for finding the geometric parameters of a hydraulic balancing device from the condition of the minimum of energy losses for the accepted statistic characteristic rigidity.
Запропонована методика статичного розрахунку вузла врівноваження осьової сили в багатоступеневому насосі – гідравлічній п’яті. В основі методики розрахунку покладена замкнена система рівнянь, які отримані з умови досягнення мінімального значення втрат енергії в гідроп’яті при прийнятій жорсткості статичної характеристики. Наведені результати експериментальної перевірки запропонованої методики
Предложена методика статического расчета узла уравновешивания осевой силы многоступенчатого насоса – гидравлической пяты. В основе методики расчета положена замкнутая система уравнений, полученных из условия достижения минимального значения потерь энергии в гидропяте при принятой жесткости статической характеристики. Приведены результаты экспериментальной проверки предложенной методики