Geometric design and performance analysis of conical-rotor screw vacuum pump with adjustable flow field clearances

Zhang, Li; Liu, Yang; Yong-ju, Zhang; Liu, Wenfei; Chen, Ziyun

doi:10.1016/j.vacuum.2023.112201

Cited by 6 publications

(2 citation statements)

References 39 publications

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“…This reduces the ultimate vacuum degree and pumping efficiency of the vacuum pump. To avoid the above contradiction, Zhang et al [80] proposed an optimized design of the conical rotor profile with a tunable flow field gap, establishing a mathematical model of the geometry and performance characteristics of the conical rotor pump. Experiments undertaken showed that the axial power of the tail rotor was less than the two cylindrical rotors compared with the fixed-pitch and variable-pitch cylindrical rotors.…”

Section: An Overview Of the Screw-type Hydrogen Circulating Pumpmentioning

confidence: 99%

A Review of the Research Progress and Application of Key Components in the Hydrogen Fuel Cell System

Li,

Wu,

Cheng

et al. 2024

Processes

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The hydrogen cycle system, one of the main systems used for hydrogen fuel cells, has many advantages. It can improve the efficiency, the water capacity, and the management of thermal fuel cells. It can also enhance the safety of the system. Therefore, it is widely used in hydrogen fuel cell vehicles. We introduce the structure and principles of hydrogen cycle pumps, ejectors, and steam separators and analyze and summarize the advantages of the components, as well as reviewing the latest research progress and industrialization status of hydrogen cycle pumps and ejectors. The technical challenges in hydrogen circulation systems and the development direction of key technologies in the future are discussed. This paper aims to provide a reference for research concerning hydrogen energy storage application technology in hydrogen fuel cell systems.

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Section: An Overview Of the Screw-type Hydrogen Circulating Pumpmentioning

confidence: 99%

A Review of the Research Progress and Application of Key Components in the Hydrogen Fuel Cell System

Li,

Wu,

Cheng

et al. 2024

Processes

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“…Vacuum pump refers to a device or equipment that uses mechanical, physical, chemical, or physicochemical methods to extract air from the container being pumped and obtain a vacuum environment. Many researchers have conducted a lot of studies on vacuum pumps: Li Zhang et al [ 1 ] designed a conical rotor screw vacuum pump with more superior performance and adjustable flow field clearance. Jun Wang et al [ 2 ] optimized the new rotor of the claw vacuum pump, optimized the performance of the vacuum pump, and effectively alleviated the adverse effects of the mixing process.…”

Section: Introductionmentioning

confidence: 99%

Study on the Pumping Performance and Structure Parameters Optimization of High-Speed Small Compound Molecular Pump

Chen,

Zhang,

et al. 2024

Micromachines

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A molecular pump is the core component of vacuum systems in portable mass spectrometers and other analytical instruments. The forms of the existing molecular pumps mainly are the combinations of vertical bleed and compression channel, which have the shortcomings of heavy mass and large volume, which seriously restricts the application and development of portable mass spectrometers. Aiming at the problems of low strength and insufficient pumping performance under the miniaturization constraints (mass of 1.8 kg; exhaust diameter of 25 mm) of molecular pumps, a compound pump consisting of a horizontal bleed channel and multi-stage spiral compression channel is proposed. The pumping principle of the compound molecular pump is analyzed to obtain its preliminary structural size parameters. The test particle Monte Carlo method is presented for establishing an aerodynamic model for a high-speed small compound molecular pump, which can be used to investigate the pumping performance of bleed blades and compression channels in a thin air environment. On the basis of the aerodynamic model, the NNIA multi-objective optimization algorithm is presented to optimize the structural parameters of the compound molecular pump. After structural parameter optimization, the maximum flow rate and compression ratio of the compound molecular pump are increased by 13.6% and 41.6%, respectively. The experimental results of the pumping performance show that the predicted data of the aerodynamic model are in good agreement with the experimental data, with an error of 12–27%. Namely, the established aerodynamic model has high accuracy and the optimized structural parameters of the compound molecular pump can provide basic conditions for the large-scale application and promotion of portable mass spectrometers.

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Effect of niobium content on microstructure and wear and corrosion resistance of laser-clad FeCo0.5CrNi1.5B0.5Nbx coatings on ductile iron

Chen,

Zhang,

Zhang

et al. 2024

Surface and Coatings Technology

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Geometric design and performance analysis of conical-rotor screw vacuum pump with adjustable flow field clearances

Cited by 6 publications

References 39 publications

A Review of the Research Progress and Application of Key Components in the Hydrogen Fuel Cell System

A Review of the Research Progress and Application of Key Components in the Hydrogen Fuel Cell System

Study on the Pumping Performance and Structure Parameters Optimization of High-Speed Small Compound Molecular Pump

Effect of niobium content on microstructure and wear and corrosion resistance of laser-clad FeCo0.5CrNi1.5B0.5Nbx coatings on ductile iron

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