Publications
2022 |
Guerra Davide; Battarra Mattia; Mucchi Emiliano Kinematics and geometrical admissibility conditions of balanced vane pumps with twin lip vanes (Journal paper) Mechanism and Machine Theory, 167 (104534), 2022, ISSN: 0094114X. (Abstract | Links | BibTeX | Tag: Battarra M., Guerra D., Mucchi E.) @article{Guerra2022, title = {Kinematics and geometrical admissibility conditions of balanced vane pumps with twin lip vanes}, author = {Guerra Davide; Battarra Mattia; Mucchi Emiliano }, editor = {Mechanism and Machine Theory}, doi = {10.1016/j.mechmachtheory.2021.104534}, issn = {0094114X}, year = {2022}, date = {2022-01-14}, journal = {Mechanism and Machine Theory}, volume = {167}, number = {104534}, abstract = {The present work is devoted to analyze the kinematics of twin lip vanes adopted in balanced vane pumps. The work provides the analytical description of the vane motion according to its geometrical parameters and the cam ring profile. Attention is given to the duality of the solution, an intrinsic property of twin lip vanes that may be considered as followers with two symmetrical half-circular tips. Based on the linkage kinematics, the analytical dissertation is further deepened to define the geometrical admissibility of the vane design and its mathematical domain. In order to evaluate the proposed approach, an extended parametric study is performed on the basis of the Buckingham theorem, detailing how the twin lip configuration affects the machine kinematics. Additional calculations are proposed to determine the vane design configurations that satisfy the fundamental law of cam design and to highlight how this requirement dramatically reduces the subset of available choices in presence of cam ring with a precompression profile. Finally, design guidelines are proposed in order to overcome these drawbacks and expand the admissibility domain.}, keywords = {Battarra M., Guerra D., Mucchi E.}, pubstate = {published}, tppubtype = {article} } The present work is devoted to analyze the kinematics of twin lip vanes adopted in balanced vane pumps. The work provides the analytical description of the vane motion according to its geometrical parameters and the cam ring profile. Attention is given to the duality of the solution, an intrinsic property of twin lip vanes that may be considered as followers with two symmetrical half-circular tips. Based on the linkage kinematics, the analytical dissertation is further deepened to define the geometrical admissibility of the vane design and its mathematical domain. In order to evaluate the proposed approach, an extended parametric study is performed on the basis of the Buckingham theorem, detailing how the twin lip configuration affects the machine kinematics. Additional calculations are proposed to determine the vane design configurations that satisfy the fundamental law of cam design and to highlight how this requirement dramatically reduces the subset of available choices in presence of cam ring with a precompression profile. Finally, design guidelines are proposed in order to overcome these drawbacks and expand the admissibility domain. |
2021 |
Guerra Davide; Polastri Marco; Battarra Mattia; Suman Alessio; Mucchi Emiliano; Pinelli Michele Design Multistage External Gear Pumps for Dry Sump Systems: Methodology and Application (Journal paper) Mathematical Problems in Engineering , 2021 , 2021. (Abstract | Links | BibTeX | Tag: Battarra M., Guerra D., Mucchi E., Pinelli M., Polastri M., Suman A.) @article{Guerra2021, title = {Design Multistage External Gear Pumps for Dry Sump Systems: Methodology and Application}, author = {Guerra Davide; Polastri Marco; Battarra Mattia; Suman Alessio; Mucchi Emiliano; Pinelli Michele }, doi = {10.1155/2021/8888128}, year = {2021}, date = {2021-03-10}, journal = {Mathematical Problems in Engineering }, volume = {2021}, abstract = {Thanks to their manufacturing simplicity, robustness, and consolidated design knowledge, external gear pumps are widely adopted in the automotive fields. With the purpose of leading the design procedure of these positive displacement machines, within this work, the authors integrate in a comprehensive tool the salient equations adopted for the design of the major gear pump features. The presented procedure is devoted to the design of multistage external gear pumps characterized by a singular floating driving shaft supported by fluid-dynamic journal bearings. Focusing the attention on the procedure flexibility, it has been structured in three iterative calculation phases. The core section of the methodology concerns the geometrical design of the involute gear tooth profile. It is oriented to ensure a proper volumetric displacement while complying with the space requirement and the tooth manufacturing limitations. Thus, through the analytical pressure loads estimation combined with the operational parameters, the second calculation step provides the design of the driving shaft and the relevant dimensions of the journal bearings. Finally, by means of a power loss approach, the third macrosection of the procedure leads to estimating the clearances between gear tip and housing. The potentials of the methodology are exposed by describing its applications to a case study of multistage gear pump employed in the dry sump lubrication system of an automotive heavy-duty engine. Each calculation step application is outlined with reference to the proposed analytical formulation and the results of the parameters calibration are presented. Within this context, the procedure is assessed by means of a CFD analysis. The results highlight the accuracy of the methodology on the estimation of the required delivery flow rate. Aside from being accurate, flexible, and reliable, the procedure stands out for being an innovative tool within the multistage gear pump framework.}, keywords = {Battarra M., Guerra D., Mucchi E., Pinelli M., Polastri M., Suman A.}, pubstate = {published}, tppubtype = {article} } Thanks to their manufacturing simplicity, robustness, and consolidated design knowledge, external gear pumps are widely adopted in the automotive fields. With the purpose of leading the design procedure of these positive displacement machines, within this work, the authors integrate in a comprehensive tool the salient equations adopted for the design of the major gear pump features. The presented procedure is devoted to the design of multistage external gear pumps characterized by a singular floating driving shaft supported by fluid-dynamic journal bearings. Focusing the attention on the procedure flexibility, it has been structured in three iterative calculation phases. The core section of the methodology concerns the geometrical design of the involute gear tooth profile. It is oriented to ensure a proper volumetric displacement while complying with the space requirement and the tooth manufacturing limitations. Thus, through the analytical pressure loads estimation combined with the operational parameters, the second calculation step provides the design of the driving shaft and the relevant dimensions of the journal bearings. Finally, by means of a power loss approach, the third macrosection of the procedure leads to estimating the clearances between gear tip and housing. The potentials of the methodology are exposed by describing its applications to a case study of multistage gear pump employed in the dry sump lubrication system of an automotive heavy-duty engine. Each calculation step application is outlined with reference to the proposed analytical formulation and the results of the parameters calibration are presented. Within this context, the procedure is assessed by means of a CFD analysis. The results highlight the accuracy of the methodology on the estimation of the required delivery flow rate. Aside from being accurate, flexible, and reliable, the procedure stands out for being an innovative tool within the multistage gear pump framework. |
2020 |
Guerra Davide; Polastri Marco; Battarra Mattia; Suman Alessio; Mucchi Emiliano; Pinelli Michele A design procedure for multistage external gear pumps (Conference) BATH/ASME 2020 Symposium on Fluid Power and Motion Control, FPMC 2020, (V001T01A048), 2020, ISBN: 978-079188375-4. (Abstract | Links | BibTeX | Tag: Battarra M., Guerra D., Mucchi E., Pinelli M., Polastri M., Suman A.) @conference{2020l, title = {A design procedure for multistage external gear pumps}, author = {Guerra Davide; Polastri Marco; Battarra Mattia; Suman Alessio; Mucchi Emiliano; Pinelli Michele}, doi = {10.1115/FPMC2020-2797}, isbn = {978-079188375-4}, year = {2020}, date = {2020-09-09}, booktitle = {BATH/ASME 2020 Symposium on Fluid Power and Motion Control, FPMC 2020}, number = {V001T01A048}, abstract = {n this work, the authors present a robust and integrated procedure for the design of multi-stage gear pumps to be used in dry sump system applications. Based on the target delivery flow rate, rotational speed and fluid properties, the developed iterative method enables to directly obtain the geometrical features and the working parameters of the pump components, such as gearpair specifics, shaft and journal bearing dimensions, clearance values. The methodology is then applied to a case study in order to highlight its features and detail the achievable outcomes. Quality of the results is assessed by means of a CFD analysis, demonstrating the capability to obtain the expected volumetric efficiency}, keywords = {Battarra M., Guerra D., Mucchi E., Pinelli M., Polastri M., Suman A.}, pubstate = {published}, tppubtype = {conference} } n this work, the authors present a robust and integrated procedure for the design of multi-stage gear pumps to be used in dry sump system applications. Based on the target delivery flow rate, rotational speed and fluid properties, the developed iterative method enables to directly obtain the geometrical features and the working parameters of the pump components, such as gearpair specifics, shaft and journal bearing dimensions, clearance values. The methodology is then applied to a case study in order to highlight its features and detail the achievable outcomes. Quality of the results is assessed by means of a CFD analysis, demonstrating the capability to obtain the expected volumetric efficiency |