Results 241 to 250 of about 26,083 (287)

The Optimal Design in External Gear Pumps and Motors

IEEE/ASME Transactions on Mechatronics, 2011
To improve the system performance of hydraulically assisted mechatronic systems, the research investigates the instantaneous pressure of the meshing action in the external gear pumps and motors. The undesired large pressure overshoots or spikes could be excited by virtue of the sudden volumetric change of meshing pockets.
Shu Wang, Hisatoshi Sakurai, Aditya Kasarekar   +2 more
openaire   +3 more sources

Efficiency of External Gear Pump

Proceedings of Higher Educational Institutions. Маchine Building, 2021
The purpose of the research was to analyze the load characteristics of external gear pumps. As the initial data, the results of factory tests of the NMSH and SH pumps, provided by HMS Livgidromash JSC, were used. The load characteristics of the gear pump NMSH32-10 were constructed, and the dependence of this pump efficiency on the dimensionless ...
N.L. Velikanov, V.A. Naumov
openaire   +1 more source

A Design Procedure for Multistage External Gear Pumps

BATH/ASME 2020 Symposium on Fluid Power and Motion Control, 2020
Abstract In 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
Guerra D., Polastri M., Battarra M., Suman A., Mucchi E., Pinelli M.   +5 more
openaire   +2 more sources

Analysis of External Gear Pump Failure

Advanced Materials Research, 2013
Several typical failures of external gear pump are presented. The reasons of the pump failure are analyzed in detail. Solutions of the failure are proposed. In order to improve the efficiency of pumps maintenance and reparation, a new kind of tool is mentioned which could predict the life of gear pump before failure occurred.
Wen Guang Zhang, Guo Min Lin, Miao Shang, Qian Chen   +3 more
openaire   +1 more source

External Gear Pump Model and Simulation

Applied Mechanics and Materials, 2011
This paper describes the development of gear pumps and the main causes of noise,and establish the overall dynamic model of external gear pump,mainly including the trapped oil model,the gear mesh model and the shell model and then go on with simulation analysis and research.Through establishment the gear pump model,it is benefit for predicting the gear ...
Hui Wang, Sha Sha Du
openaire   +1 more source

Modeling Run in Process in External Gear Pumps

Volume 3: Dynamic Systems and Controls, Symposium on Design and Analysis of Advanced Structures, and Tribology, 2006
In this work, the authors have developed a mathematical model that simulates the run in of external gear pumps, as an useful tool in the optimization of this time-consuming process. The model calculates the wear profile of the case by enveloping the tip circle of the gears concerning all the run in steps.
DALPIAZ, Giorgio, D'ELIA, Gianluca, MUCCHI, Emiliano, A. FERNANDEZ DEL RINCON   +3 more
openaire   +2 more sources

A Robust Design Optimization Methodology for External Gear Pumps

ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, Volume 4, 2010
This work addresses the topic of external gear pumps for automotive applications, which operate at high speed and low pressure. In previous works of the authors, a hybrid lumped-parameter/finite-element model has been developed, in order to foresee the pump dynamic behaviour in terms of gear and casing acceleration.
MUCCHI, Emiliano, TOSI, Gabriele, R. d’Ippolito, DALPIAZ, Giorgio   +3 more
openaire   +2 more sources

Formulation and optimization of involute spur gear in external gear pump

Mechanism and Machine Theory, 2017
Abstract External gear pumps (EGPs) have gained popularity among applications in many fields like fluid power transmissions and systems, automotive, aerospace thanks to their advantage of simplicity, robustness and low cost. Several studies were performed to analyze and innovate the gear profiles of EGPs to achieve better performance, in terms of ...
Xinran Zhao, Andrea Vacca
openaire   +1 more source

Wear in external gear pumps: A simplified model

Wear, 1994
Abstract Wear in external gear pumps, as used in hydraulic systems, is not uniformly distributed over the sliding surfaces. It is confirmed that wear occurs at regions of close clearance. Flow between these surfaces is complex, and existing fundamental wear models are not satisfactory.
R.H. Frith, W. Scott
openaire   +1 more source

CFD Model of an External Gear Pump

2017
The paper presents a CFD model of an external gear pump. To investigate the fluid flow phenomena that occur in external gear pumps, one of the commercial CFD software packages was selected. The immersed solid method was used to simulate the flows induced by the rotation of gears.
Paulina Jędraszczyk, Wiesław Fiebig
openaire   +1 more source