Efficiency improvement of Roots vacuum pump working process

Бурмистров, А. В.; Raykov, A.; Исаев, А. А.; Salikeev, S.; Kapustin, E.; Fomina, M.

doi:10.1002/vipr.202200780

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…The error might be caused by a difference in the layout of the water inlet pipe between the actual experiment and the installation of the measuring instrument. The error is within the acceptable range [21]. The study findings reveal that the accuracy and reliability of the numerical calculation model have been verified.…”

Section: Calculation Model Reliability Analysissupporting

confidence: 55%

Hydrodynamic Characteristic Analysis and NSGA-II Optimization of a Vacuum Fish Pump

Hong

Zhu

Zhang

et al. 2023

JMSE

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The fish pump is an important piece of power equipment for aquaculture, especially for deep-sea engineering vessels and cage culture. Fish pump research focuses on reducing fish body damage, improving survival rates, and increasing fish lifting efficiency. The research object in this paper is a new type of vacuum fish pump, with the aim of improving the hydraulic performance of the vacuum fish pump and reducing the damage to the fish body. The dependent variables include the dynamic change process of the flow state and flow field under diachronic conditions, the fluid simulation analysis of the vacuum pump body and the flow channel structure, the inlet flow rate of the fish pump, the negative pressure of the pipeline, and the impact force of the water flow on the inner wall of the tank. The independent variables include the operating conditions of the pump body and the fish pump. The Latin hypercube sampling method is used to extract 167 sets of calculation models for the independent variables, and multi-objective optimization is performed based on the NSGA-II algorithm for the hydrodynamic performance of the fish pump. On the basis of ensuring the fish body damage rate, the structural parameters of the vacuum fish pump with the optimal hydrodynamic performance under 167 sets of parameter values were obtained. The optimized parameters were then entered into the solver again, and the results showed that, in the optimal structural parameters under certain conditions, the direction of the incident water flow in the vacuum fish pump tank is close to the upper end of the tank body, which will reduce the speed of the fish-water mixed flow when entering the tank, thereby reducing the collision damage to the fish body. Currently, the water flow velocity at the water inlet is about 2.5 m/s, and the negative pressure value distribution gradient between the tank body and the water inlet pipeline is quite consistent, which can achieve good fish suction and fish lifting effects.

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Section: Calculation Model Reliability Analysissupporting

confidence: 55%

Hydrodynamic Characteristic Analysis and NSGA-II Optimization of a Vacuum Fish Pump

Hong

Zhu

Zhang

et al. 2023

JMSE

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“…It is extremely important for pumping light gases, such as hydrogen and helium, because the conductance of the rotor mechanism clearances and the backward flow are very high. many factors influence Roots pump characteristics, but the most important of them are the cut-off volume and the conductance of the rotor mechanism clearances depending on the rotors profile [4,5].…”

Section: Introductionmentioning

confidence: 99%

Roots multi‐lobe vacuum pumps with external compression

Raykov,

Salikeev,

Burmistrov

et al. 2024

Vak Forsch Prax

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SummaryThe influence of the number of lobes on the working process of Roots vacuum pump is examined using the production vacuum pump NVD‐200 with a rotor profile based on an elliptical curve as a prototype. Design with two‐lobe, three‐lobe and four‐lobe rotor profiles was considered. Calculation of the main parameters characterizing profile quality (area‐utilizing ratio and conductance of rotor mechanism clearances) was carried out. The influence of rotor “plumpness” on pumping characteristics was studied. It is shown that the number of lobes providing the maximal pumping speed is different depending on the geometric parameters of the rotor.

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“…At present, there are several approaches to modeling of displacement vacuum pumps working processes. Most information about their working process can be obtained by computational hydraulic gas dynamics methods (CFD) [3,4]. But most of the available software products cover only viscous and near viscous gas flow.…”

Section: Introductionmentioning

confidence: 99%

Non‐contact vacuum pumps

Raykov,

Salikeev,

Burmistrov

et al. 2023

Vak Forsch Prax

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SummaryAn overview of the main methods for mathematical modeling of the working process of non‐contact vacuum pumps is given. The specifics and the main stages of mathematical model development for screw, scroll, claw and Roots vacuum pumps are considered. The results of mathematical modeling of pump characteristics are presented and compared with experimental data. The mathematical modeling technique presented here can be recommended for analyzing the influence of pump geometry and operating conditions on the pump characteristics of non‐contact oil‐free vacuum pumps.

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Efficiency improvement of Roots vacuum pump working process

Cited by 3 publications

References 13 publications

Hydrodynamic Characteristic Analysis and NSGA-II Optimization of a Vacuum Fish Pump

Hydrodynamic Characteristic Analysis and NSGA-II Optimization of a Vacuum Fish Pump

Roots multi‐lobe vacuum pumps with external compression

Non‐contact vacuum pumps

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