EFFECTS OF MANUFACTURING DEVIATION ON THE PRESSURE PULSATION OF THREE SCREW PUMPS

Authors

  • Sunghun Kim RWTH Aachen University, Institute for Fluid Power Drives and Controls, Steinbachstr. 53, 52074 Aachen, Germany
  • Ulf Piepenstock RWTH Aachen University, Institute for Fluid Power Drives and Controls, Steinbachstr. 53, 52074 Aachen, Germany
  • Hubertus Murrenhoff RWTH Aachen University, Institute for Fluid Power Drives and Controls, Steinbachstr. 53, 52074 Aachen, Germany

Keywords:

screw pump, pulsation, manufacturing deviation, RALA

Abstract

When both, a low operating pressure and an extremely low pulsation is required screw pumps can be better than other machines. Due to their low pulsation, low noise level, good suction ability and high reliability, screw pumps are often the best solution. It is shown in this paper that pumps can vary in pressure pulsation very much depending on manufacturing deviations. Therefore this paper deals with a simulation model, which was verified by experimental tests. Then the calculated pressure pulsation according to cylindrical, conical and eccentric deviation in dimension of the manufactured parts from the design is presented. Precisely, each difference in pulsation characteristic can be explained with manufacturing deviations. Three screw pumps are very sensitive to eccentricity and pressure pulsation can be reduced by using the optimal length of the drive spindle. Additionally, the positive impact of a conical spindle is shown.

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Author Biographies

Sunghun Kim, RWTH Aachen University, Institute for Fluid Power Drives and Controls, Steinbachstr. 53, 52074 Aachen, Germany

Sunghun Kim Born on May 11th, 1977 in Korea. He received his degree in Mechanical Engineering with focus on Engineering Design from Korea Aviation University in 2004. After his graduation, he worked at the Korea Institue of Machinery and Materials (KIMM). And since 2007, he is member of the scientific staff of the Institute for Fluid Power Drives and Controls (IFAS) at RWTH Aachen University. His present research interests include hydraulic pump technology.

Ulf Piepenstock, RWTH Aachen University, Institute for Fluid Power Drives and Controls, Steinbachstr. 53, 52074 Aachen, Germany

Ulf Piepenstock Born on August 15th, 1978, he received his degree in mechanical engineering (Dipl.-Ing.) at RWTH Aachen University, Germany in 2005. Since 2005 he has been a member of the scientific staff and since 2006 he has been head of the research group “Pump and Motor Technology” at the Institute for Fluid Power Drives and Controls (IFAS) at RWTH Aachen University.

Hubertus Murrenhoff, RWTH Aachen University, Institute for Fluid Power Drives and Controls, Steinbachstr. 53, 52074 Aachen, Germany

Hubertus Murrenhoff Born on August 13th, 1953 in Germany, he is director of the Institute for Fluid Power Drives and Controls (IFAS) and dean of faculty of mechanical engineering at RWTH Aachen University, Germany. Main research interests cover hydraulics and pneumatics including components and the applications of fluid power in mobile and stationary equipment.

References

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Published

2011-03-01

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Section

Original Article

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