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Development of a rotary clap mechanism for positive-displacement rotary pumps: Experimental verification and optimization

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Abstract

We have developed a new positive-displacement type rotary clap pump. Its structure, working principles and pumping performances have been introduced and analyzed in the previous studies. In this study, the experiment using prototype rotary clap pump was conducted to verify the analyzed pump performances. The simulated flow rate, differential pressure, driving torque, and efficiencies for the prototype rotary clap pump were compared with the measurement results. We confirmed the applicability of the analysis model, because the most of simulated values agreed well with the measured values. The parametric study for the prototype rotary clap pump was conducted using the analysis model. The used parameters were the clearance between the rotor jaws and chambers, the number of jaws, the jaw width, and the jaw height, which are known as the important variables in the pump performance. Base on the parametric study, we found optimized condition that can increase overall efficiency up to 96.3%. The rotary clap pump generates relatively low pressure pulsation and can increase its displacement with low vibration and power loss compared to the reciprocating pump. This pump could be a better option for high-viscosity fluids at a high flow rate than any other positive-displacement pumps.

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Abbreviations

ΔpFM :

Pressure head caused by the flowmeter, Pa

Q:

Flow rate, m3/sec

ρ:

fluid density, kg/m3

f6-7,d, f6-7,s :

Friction factors in discharge and suction pipe

l6-7,d, l6-7,s :

Length of discharge and suction pipe, m

D6-7,d, D6-7,s :

Diameter of discharge and suction pipe, m

Q6-7,d, Q6-7,s :

Flow rate in discharge and suction pipe, m3/sec

A6-7,d, A6-7,s :

Cross section area of discharge and suction pipe, m2

K:

Loss coefficient for pipe component

h6-7,d, h6-7,s :

Height of discharge and suction pipe, m

δ1, δ2 :

Clearances between chamber and rotor jaws, m

N:

Number of jaws

Wj :

Width of jaw, m

h:

Jaw height, m

ηv :

Volumetric efficiency

ηt :

Torque efficiency

η:

Overall efficiency

p7,d–p6,d :

Differential pressure in the discharge pipe, Pa

p7,s–p6,s :

Differential pressure in the suction pipe, Pa

p0 :

Gas charging pressure, Pa

pm :

Mean pressure of the pump system, Pa

References

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Author information

Authors and Affiliations

  1. Upland-field Machinery Research Center, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu, 41566, South Korea

    Sung-Bo Shim

  2. Department of Biosystems and Biometerials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea

    Young-Jun Park & Kyeong-Uk Kim

  3. Research Institute for Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea

    Young-Jun Park

  4. Department of Biosystems Engineering, Kangwon National University, 1 Kangwondaehak-gil, Chuncheon-si, Gangwon-do, 24341, South Korea

    Ju-Seok Nam

  5. Department of System Reliability, Korea Institute of Machinery and Materials, 1156, Gajeongbuk-ro, Yuseong-gu, Daejeon, 34103, South Korea

    Su-Chul Kim

  6. ClapMC Co., Ltd., 156, Gajeongbuk-ro, Yuseong-gu, Daejeon, 34103, South Korea

    Jong-Mun Kim

Authors
  1. Sung-Bo Shim
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  2. Young-Jun Park
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  3. Ju-Seok Nam
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  4. Su-Chul Kim
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  5. Jong-Mun Kim
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  6. Kyeong-Uk Kim
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Corresponding author

Correspondence to Sung-Bo Shim.

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Shim, SB., Park, YJ., Nam, JS. et al. Development of a rotary clap mechanism for positive-displacement rotary pumps: Experimental verification and optimization. Int. J. Precis. Eng. Manuf. 18, 587–597 (2017). https://doi.org/10.1007/s12541-017-0070-z

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  • DOI: https://doi.org/10.1007/s12541-017-0070-z

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