An analytical model of claw rotor profiles and working process model with the mixing process for claw vacuum pumps

Wang, Jun; Song, Yongxing; Jiang, Xitong; Cui, Dong; Qu, Yan

doi:10.1016/j.vacuum.2014.12.029

Cited by 21 publications

(4 citation statements)

References 9 publications

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“…Therefore, the oil-free hydrogen circulating pump is the key equipment in the PEMFC. The claw pump [4], which is a new type of hydrogen circulating pump, shows significant advantages in terms of simple manufacturing, oilfree and high reliability over other hydrogen circulating pumps. Therefore, the claw pump is well-suited for the PEMFC system.…”

Section: Introductionmentioning

confidence: 99%

Pressurization process and performance analysis of gear-claw hydrogen circulating pump used in PEMFC system

Pan,

Wang,

Zhao

et al. 2024

J. Phys.: Conf. Ser.

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Owing to the structure of the gear-claw rotor, working chambers of claw pumps are divided into small multi-chambers by a pair of intermeshing claw rotors in the mixing process, and the transient flow in multi-chambers is complicated, which results in the increase of the pump consumption. Hence, it is necessary to study the transient flow and working process of gear-claw hydrogen circulating pumps to optimize the pump performance. In this study, the meshing model of a high-order curve and its conjugate curve was proposed, and the profile composition of the gear-claw rotor was introduced. The influence of the radius ratio of claw addendum arc on the performance including relative carryover, built-in volume ratio and volume utilization was analyzed. The flow field of gear-claw hydrogen circulating pump including pressure and velocity field was analyzed by using numerical simulations. Furthermore, the p-V diagram of pumps was obtained. It is found that the gas in the compression chamber is mixed with the gas in the carryover, and the initial pressure in the compression chamber is 130.78kPa, which increases by 29.07% compared to the original initial pressure in the compression chamber. Therefore, an overcompression phenomenon at the end of the compression process (at the beginning of the discharge process) occurs.

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Section: Introductionmentioning

confidence: 99%

Pressurization process and performance analysis of gear-claw hydrogen circulating pump used in PEMFC system

Pan,

Wang,

Zhao

et al. 2024

J. Phys.: Conf. Ser.

Self Cite

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“…The CFD method was more accurate in predicting flow and power consumption. Wang et al 18,19 constructed a new type of rotor profile to solve the problem of non-smooth connection points in various claw vacuum pump rotor profiles. The new profile showed much better mechanical properties and performance during the meshing process.…”

Section: Introductionmentioning

confidence: 99%

Effects of clearances size and fluid medium components on the thermodynamic performance of a claw pump for fuel cell vehicle

Zhao

Wei

Zhang

et al. 2022

Intl J of Energy Research

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Claw-type pump is one of the most promising candidates in the circulating system of the hydrogen fuel cell because of its compact structure and high reliability. In this paper, claw-type hydrogen circulating pump with a rated flowrate of 0.4 Nm 3 Ámin À1 was designed and fabricated. An internal flow model of the claw pump was established to investigate the thermodynamic performances with air. Then, a test rig was carried out to validate the feasibility of the numerical model with air. Finally, the numerical model was used to

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“…In addition, Hsieh [19] first proposed a simple method to get a conjugate claw rotor profile without deriving the meshing equation and discussed the geometric parameter design influences on the gas port, pump performance and interference conditions. Subsequently, based on this method, Wang et al [20,21] proposed a novel circular arc claw rotor profile to lower the rotor stress condition. They also analyzed the flow characteristics during the pump working process by employing the FLUENT package.…”

Section: Introductionmentioning

confidence: 99%

“…In the fluid analysis, these studies [13e16, 20,21] primarily developed two-dimensional numerical approaches using CFD methods or CFD tools for cylindrical type rotary pumps. Although the industry commonly uses rotary pumps with a cylindrical or screw design, there is no survey or paper applying a three-dimensional numerical approach to the rotary pump's flow performance.…”

Section: Introductionmentioning

confidence: 99%

Fluid analysis of cylindrical and screw type Roots vacuum pumps

Hsieh

Zhou

2015

Vacuum

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An analytical model of claw rotor profiles and working process model with the mixing process for claw vacuum pumps

Cited by 21 publications

References 9 publications

Pressurization process and performance analysis of gear-claw hydrogen circulating pump used in PEMFC system

Pressurization process and performance analysis of gear-claw hydrogen circulating pump used in PEMFC system

Effects of clearances size and fluid medium components on the thermodynamic performance of a claw pump for fuel cell vehicle

Fluid analysis of cylindrical and screw type Roots vacuum pumps

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