0
research-article

Efficiency of a Fixed Displacement Pump with Flow Control Using an Inlet Metering Valve

[+] Author and Article Information
Hasan Ali

Mechanical and Aerospace Engineering, University of Missouri-Columbia, Columbia, MO
hha2mf@mail.missouri.edu

Julie Wisch

Mechanical and Aerospace Engineering, University of Missouri-Columbia, Columbia, MO
julie.wisch@fayar.net

Roger Fales

Mechanical and Aerospace Engineering, University of Missouri-Columbia, Columbia, MO
falesr@missouri.edu

Noah Manring

Mechanical and Aerospace Engineering, University of Missouri-Columbia, Columbia, MO
ManringN@missouri.edu

1Corresponding author.

ASME doi:10.1115/1.4041606 History: Received April 17, 2017; Revised September 25, 2018

Abstract

Axial piston pumps with variable volumetric displacement are often used to control flow and pressure in hydraulic systems. The displacement control mechanism in these pumps occupies significant space and accounts for significant cost in the pump design. Fixed displacement pumps have lower cost and a more compact design but suffer from a significant energy consumption disadvantage due to the need to control flow and pressure by throttling flow and bypassing unused flow to pressures below the discharge pressure. An inlet metering valve controlled pump marks a recent development in pumping technology for hydraulic systems. In this design, an inlet metering valve restricts inlet flow reducing inlet pressure so that the specific volume of the fluid is increased as it enters a fixed displacement pump. By altering the specific volume of the working fluid, the inlet metering valve permits precise control over the pump discharge flow. This paper presents a theoretical model for inlet metered pump efficiency. The work considers additional sources of energy loss unique to the inlet metering system. Experimental results associated with inlet metered pump efficiency are presented. A comparison of the theoretical model and the experimental results is also included. It is determined that the current efficiency model accurately predicts efficiencies determined using experimental data.

Copyright (c) 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In