### Abstract

Oil hydraulic gear pumps are well known for yielding a pulsating flowrate which is theoretically determined by the geometry of gears. In the present paper, we aim to measure actual waveforms of a gear pump output with high-frequency pulsation. The measurement is based on detecting pressure differences kinetically induced by the motion of an oil column, and the accuracy of the method has proven satisfactory in advance of actual use. The findings are as follows: (1) Whether the pulsation impedance for the 1st harmonic at the pump outport is larger or smaller than that for the 2nd harmonic mainly dominates the waveforms of flowrate pulsation. (2) According to whether the impedance for the 1st harmonic is larger or smaller than that for the 2nd harmonic, the 2nd harmonic of pump output becomes larger and the 1st one smaller than the theoretical predictions, or vice versa. (3) This tendency becomes more marked as the line pressure increases.

Original language | English |
---|---|

Pages (from-to) | 2855-2862 |

Number of pages | 8 |

Journal | Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B |

Volume | 59 |

Issue number | 565 |

Publication status | Published - Sep 1993 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Mechanical Engineering

### Cite this

*Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B*,

*59*(565), 2855-2862.

**Measurement of pulsating flowrate from a gear pump.** / Washio, Seiichi; Yamaguchi, Satoshi; Takahashi, Satoshi.

Research output: Contribution to journal › Article

*Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B*, vol. 59, no. 565, pp. 2855-2862.

}

TY - JOUR

T1 - Measurement of pulsating flowrate from a gear pump

AU - Washio, Seiichi

AU - Yamaguchi, Satoshi

AU - Takahashi, Satoshi

PY - 1993/9

Y1 - 1993/9

N2 - Oil hydraulic gear pumps are well known for yielding a pulsating flowrate which is theoretically determined by the geometry of gears. In the present paper, we aim to measure actual waveforms of a gear pump output with high-frequency pulsation. The measurement is based on detecting pressure differences kinetically induced by the motion of an oil column, and the accuracy of the method has proven satisfactory in advance of actual use. The findings are as follows: (1) Whether the pulsation impedance for the 1st harmonic at the pump outport is larger or smaller than that for the 2nd harmonic mainly dominates the waveforms of flowrate pulsation. (2) According to whether the impedance for the 1st harmonic is larger or smaller than that for the 2nd harmonic, the 2nd harmonic of pump output becomes larger and the 1st one smaller than the theoretical predictions, or vice versa. (3) This tendency becomes more marked as the line pressure increases.

AB - Oil hydraulic gear pumps are well known for yielding a pulsating flowrate which is theoretically determined by the geometry of gears. In the present paper, we aim to measure actual waveforms of a gear pump output with high-frequency pulsation. The measurement is based on detecting pressure differences kinetically induced by the motion of an oil column, and the accuracy of the method has proven satisfactory in advance of actual use. The findings are as follows: (1) Whether the pulsation impedance for the 1st harmonic at the pump outport is larger or smaller than that for the 2nd harmonic mainly dominates the waveforms of flowrate pulsation. (2) According to whether the impedance for the 1st harmonic is larger or smaller than that for the 2nd harmonic, the 2nd harmonic of pump output becomes larger and the 1st one smaller than the theoretical predictions, or vice versa. (3) This tendency becomes more marked as the line pressure increases.

UR - http://www.scopus.com/inward/record.url?scp=0027663719&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027663719&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0027663719

VL - 59

SP - 2855

EP - 2862

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

SN - 0387-5016

IS - 565

ER -