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      An Empirical Model for the Churning Losses Prediction of Fluid Flow Analysis in Axial Piston Pumps

      research-article
      1 , 2 , 1 , 1 , 1 , *
      Micromachines
      MDPI
      axial piston pumps, churning losses, prediction model

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          Abstract

          The manufacturing development of axial piston pumps usually takes the trend of high speed and miniaturization, and increases power density. Axial piston pumps are usually characterized as high speed to improve the power density; thus, high-speed churning losses caused by the internal rotating components stirring the oil can increase significantly. In order to improve the efficiency, more attention should be given to the churning losses in axial piston pumps, especially in high-speed conditions. Using the method of least-squares curve fitting, this paper establishes a series of formulas based on the churning losses test rig over a wide range of speeds, which enable accurate predictions of churning losses on the cylinder block and pistons. The reduction coefficient of flow resistance of multi-pistons as calculated. The new churning losses formula devoted to the cylinder block and rotating pistons was validated by comparison with experimental evidence in different geometries of axial piston pumps. According to the prediction model of churning losses, some valuable guidance methods are proposed to reduce the energy losses of the axial piston pump, which are the theoretical support for the miniaturization of axial piston pump manufacturing.

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          Most cited references28

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          REVIEW—Review of Flow Interference Between Two Circular Cylinders in Various Arrangements

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            Characteristics of the Flow around Two Circular Cylinders Arranged in Tandem : 1st Report

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              Flow induced oscillations of two interfering circular cylinders

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                Author and article information

                Contributors
                Role: Academic Editor
                Journal
                Micromachines (Basel)
                Micromachines (Basel)
                micromachines
                Micromachines
                MDPI
                2072-666X
                03 April 2021
                April 2021
                : 12
                : 4
                : 398
                Affiliations
                [1 ]School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China; yingli@ 123456ysu.edu.cn (Y.L.); chenxing@ 123456stumail.ysu.edu.cn (X.C.); luohaolh@ 123456stumail.ysu.edu.cn (H.L.)
                [2 ]State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
                Author notes
                [* ]Correspondence: author: zhangjin@ 123456ysu.edu.cn
                Author information
                https://orcid.org/0000-0002-4077-1075
                https://orcid.org/0000-0002-3828-1085
                https://orcid.org/0000-0003-0512-6051
                Article
                micromachines-12-00398
                10.3390/mi12040398
                8066296
                fb64e73e-2ef8-47d0-951f-3cd75f8e5d06
                © 2021 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( https://creativecommons.org/licenses/by/4.0/).

                History
                : 03 March 2021
                : 01 April 2021
                Categories
                Article

                axial piston pumps,churning losses,prediction model
                axial piston pumps, churning losses, prediction model

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