Noise Simulation Analysis of a Variable Displacement External Gear Pump and Unloading Groove Optimization

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 pump trapped oil pressure and studying the impact of parameter changes on the pressure,and getting the natural frequencies and model shapes of the gear pump structural system,so that we can analysis external gear pump vibration and assess gear pump design optimization,while helping to find the effective measures to control gear pump noise and ease trapped oil phenomenon.

Download Full-text

Parameterization, Modeling, and Validation in Real Conditions of an External Gear Pump

Sustainability ◽

10.3390/su13063089 ◽

2021 ◽

Vol 13 (6) ◽

pp. 3089

Author(s):

Miquel Torrent ◽

Pedro Javier Gamez-Montero ◽

Esteban Codina

Keyword(s):

Working Conditions ◽

Test Bench ◽

Fluid Dynamic ◽

Graph Model ◽

Field Tests ◽

Black Box ◽

Gear Pump ◽

Volumetric Behavior ◽

External Gear Pump ◽

Standard Tests

This article presents a methodology for predicting the fluid dynamic behavior of a gear pump over its operating range. Complete pump parameterization was carried out through standard tests, and these parameters were used to create a bond graph model to simulate the behavior of the unit. This model was experimentally validated under working conditions in field tests. To carry this out, the pump was used to drive the auxiliary movements of a drilling machine, and the experimental data were compared with a simulation of the volumetric behavior under the same conditions. This paper aims to describe a method for characterizing any hydrostatic pump as a “black box” model predicting its behavior in any operating condition. The novelty of this method is based on the correspondence between the variation of the parameters and the internal changes of the unit when working in real conditions, that is, outside a test bench.

Download Full-text

The Research on Pure Water Hydraulic External Gear Pump

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.44-47.1767 ◽

2010 ◽

Vol 44-47 ◽

pp. 1767-1772

Author(s):

De Xin Zhao ◽

Rui Bo Yuan ◽

Jing Luo

Keyword(s):

Surface Treatment ◽

Structural Design ◽

Treatment Process ◽

Pure Water ◽

Spare Part ◽

Gear Pump ◽

Calculation Of Parameters ◽

Water Hydraulic ◽

Engineering Materials ◽

External Gear Pump

This article describes the structure of pure water hydraulic external gear pump, structural design and calculation of parameters,analysises the mai spare part material of pure water hydraulic external gear pump and determines the type of the new engineering materials. Besides the surface treatment process of pump are discussed. Pure water hydraulic external gear pump is simulated by FLUENT, obtaining the parameters of the influence of the pump's performance.

Download Full-text

Computer Prediction of Cyclic Excitation Sources for an External Gear Pump

Proceedings of the Institution of Mechanical Engineers Part B Management and engineering manufacture ◽

10.1243/pime_proc_1985_199_064_02 ◽

1985 ◽

Vol 199 (3) ◽

pp. 175-180 ◽

Cited By ~ 10

Author(s):

K Foster ◽

R Taylor ◽

I M Bidhendi

Keyword(s):

Computer Program ◽

Gear Pump ◽

Computer Prediction ◽

Pressure Distributions ◽

External Gear Pumps ◽

Theoretical Predictions ◽

Gear Pumps ◽

External Gear Pump

A description is given of a computer program for investigating the performance of the external gear pumps under varying conditions with the special emphasis on the examination of pressure distributions within the pump, i.e. excitation forces for the vibration of the pump case and the variation in flow generated by the pump. Measurements are presented for the variation with time of tooth space pressure and the results are compared with the theoretical predictions from the computer program.

Download Full-text

Experimental Investigation of Flowrate Irregularity in Rotary Gear Pumps

6th International Power Transmission and Gearing Conference: Advancing Power Transmission Into the 21st Century ◽

10.1115/detc1992-0035 ◽

1992 ◽

Author(s):

G. Mimmi

Keyword(s):

Experimental Investigation ◽

Flow Rate ◽

Experimental Tests ◽

Periodic Variation ◽

Experimental Results ◽

Gear Pump ◽

Gear Pumps ◽

Hot Film ◽

Instantaneous Flow Rate ◽

External Gear Pump

Abstract In a previous paper the author proposed a method to reduce the periodic variation in flow rate for an external gear pump. To verify the experimental results, a series of experimental tests on a expressly realized gear pump, was carried out. The pump was equipped with relieving grooves milled into the side plates. The tests were done on a closed piping specifically realized and equipped for measuring the instantaneous flow rate of the fluid through a wedge-shaped hot film probe.

Download Full-text