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
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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