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

Kalinichenko, Pavlo Mykhailovych; Gusak, Oleksandr; Khovanskyy, Sergey; Krutas, Yuliya

doi:10.15587/1729-4061.2017.97162

Cited by 8 publications

(7 citation statements)

References 3 publications

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“…Снизить скорость адгезионного износа деталей гидропяты при работе секционного насоса в переходных режимах возможно с помощью увеличения их размеров, так как это ведет к уменьшению контактного давления [25,32,34]. В то же время опыт эксплуатации секционных насосов главной водоотливной установки подземного кимберлитового рудника «Удачный» показал, что применение заводских гидропят повышенного диаметра не всегда положительно сказывается на эффективности применения насосов.…”

Section: результаты проверки на полноту собранного материалаunclassified

“…Кроме работы секционного насоса в переходных режимах процесс адгезионного изнашивания деталей гидропяты сильно активизируется при критическом смещении ротора насоса [30,34,35]. Для защиты от интенсивного адгезионного изнашивания деталей гидропяты секционного насоса рекомендуется устанавливать вибродатчик на трубе разгрузки, с помощью показаний которого можно оперативно идентифицировать критический осевой сдвиг ротора, тем самым свести затраты на ремонтные работы по восстановлению работоспособности деталей гидропяты к минимуму [10,30].…”

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One of the ways to increase the durability of the sectional pump balancing ring

Ovchinnikov

2021

PMI

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The article presents the results of scientific research aimed at struggling the adhesive wear of parts of sectional pumps balancing ring, where the drainage units pumping equipment of the Russian Federation underground kimberlite mines was used as an object of research. It has been theoretically proven and experimentally confirmed that if there is data on the total operating time of a sectional pump in transient modes per day, using the constructed regression model, it is possible to calculate with high accuracy the average operating time of its balancing ring unit to failure. The constructed regression model is applicable only to sectional pumps of drainage units of underground kimberlite mines in the Russian Federation. It is possible to increase the durability of the balancing ring by reducing the acceleration and deceleration time of the sectional pump; for safe operation, it should be at least 10 s. Pilot tests carried out indicate the effectiveness of the proposed method for prompt identification of the critical axial displacement of the sectional pump rotor through the vibration of the discharge tube. The introduction of this method will reduce the cost of repair work to restore the performance of parts of the hydraulic foot to a minimum.

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Section: результаты проверки на полноту собранного материалаunclassified

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One of the ways to increase the durability of the sectional pump balancing ring

Ovchinnikov

2021

PMI

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“…Application of the regression analysis additionally allows evaluating the unknown parameters of the following analytical dependence for determining the hydraulic losses [28,29]: This dependence is an identical modification of the Darcy-Weisbach equation [30], widely used for solving the applied problems in the field of hydroaeromechanics.…”

Section: Hydraulic Lossesmentioning

confidence: 99%

“…Application of the regression analysis additionally allows evaluating the unknown parameters of the following analytical dependence for determining the hydraulic losses [28,29]:…”

Section: Hydraulic Lossesmentioning

confidence: 99%

Solving the Coupled Aerodynamic and Thermal Problem for Modeling the Air Distribution Devices with Perforated Plates

et al. 2019

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The article is focused on the comprehensive analysis of the aerodynamics of air distribution devices with the combined heat and mass exchange, with the aim to improve the following hydro- and thermodynamic parameters of ventilation systems: flow rate, air velocity, hydraulic losses, and temperature. The inadequacy of the previously obtained characteristics has confirmed the need for more rational designs of air distribution systems. Consequently, the use of perforated plates was proposed to increase hydraulic losses for reducing the average velocity and ensuring a uniform distribution of the velocity field on the outlet of the device. The effectiveness of one of the five possible designs usage is confirmed by the results of numerical simulation. The coefficient of hydraulic losses decreased by 2.5–3.0 times, as well as the uniformity of the outlet velocity field for the air flow being provided. Based on the three-factor factorial experiment, the linear mathematical model was obtained for determining the dependence of the average velocity on the flow rate, plate’s area, and diameter of holes. This model was significantly improved using the multiparameter quasi-linear regression analysis. As a result, the nonlinear mathematical models were obtained, allowing the analytical determination of the hydraulic losses and average velocity of the air flow. Additionally, the dependencies for determining the relative error of measuring the average velocity were obtained.

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“…Application of artificial neural network for identification of bearing stiffness characteristics in rotor dynamics analysis is proposed in the paper [10]. Effective modes of axial balancing of centrifugal pump rotor are obtained, as well as new design solutions of balancing devices based on hydrostatic seals, as well as the development of the procedure for numerical simulation of the automatic balancing device under the condition of minimal energy losses are presented in paper [11]. General approach for using artificial neural networks for dynamic analysis of the rotors is presented in work [12].…”

Section: Literature Reviewmentioning

confidence: 99%

Estimation of the Reliability of Automatic Axial-balancing Devices for Multistage Centrifugal Pumps

Pavlenko

Trojanowska

Gusak

et al. 2018

Period. Polytech. Mech. Eng.

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The permanent increase of operating parameters of modern multistage centrifugal pumps requires more precise modelling for estimation their dynamic reliability and needs to develop new approach and methodology for the related calculations. It is necessary to change the approach assuming empirical coefficients to another one based on the probabilistic design for analysis of reliability for pumps and their nodes. In this case, the probabilistic parameters of the design features and fluid flow are significant for the calculation (e. g. geometry of gap seals, boundary conditions, material properties) and should be considered. The automatic axial-balancing device of the rotor is one of the most important nodes of multi-stage centrifugal pumps. It operates as the balancing disc for the axial force up to 1 MN. This paper presents the methodology for the numerical calculation of the balancing disc and its influence on the reliability of multistage centrifugal pumps. The proposed approach is based on the criterion of the permissible amplitudes of axial oscillations of the rotor with the automatic axial-balancing device considering probabilistic origin of main geometrical, hydromechanical and operating parameters.

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

Cited by 8 publications

References 3 publications

One of the ways to increase the durability of the sectional pump balancing ring

One of the ways to increase the durability of the sectional pump balancing ring

Solving the Coupled Aerodynamic and Thermal Problem for Modeling the Air Distribution Devices with Perforated Plates

Estimation of the Reliability of Automatic Axial-balancing Devices for Multistage Centrifugal Pumps

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