Wear in external gear pumps: A simplified model

Frith, Robert; Scott, W

doi:10.1016/0043-1648(94)90279-8

Cited by 14 publications

(6 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The absolute pressure at the suction and pressure side of the pump is measured with pressure transducers. The torque (12) and the pump speed (13) are measured with a torque measuring flange which is located between the electric motor and the magnetic coupling of the pump. The pump discharge flow is measured with a high-precision turbine wheel flow meter (5).…”

Section: Experimental Set-upmentioning

confidence: 99%

Development of a novel miniature high-pressure fuel pump with a low specific speed

Schiffer

Benigni

Jaberg

2013

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

Whenever a small amount of fluid has to be pumped against a high differential pressure, various types of piston pumps are typically used. However, the need for excellent suction behaviour, for the possibility of a dry run and for minimal manufacturing costs requires the development of alternative pump concepts. This paper presents the development of a novel miniature high-pressure fuel gear pump to replace the feed pump as well as the high-pressure pump in gasoline direct-injection fuel systems. It was found that the clearance between the housing and the rotating gears has to be reduced to a minimum in order to keep the internal leakage at a reasonable level. Based on theoretical predictions a radially and axially pressure-compensated pump concept was developed by incorporation of a floating sealing element able to minimize the tip and face leakages. The design of this sealing element was optimized in the course of experimental investigations. The experiments were carried out using a specifically developed test rig, and the obtained results prove that the optimized pump is able to generate the required differential pressure Dp = 40-50 bar at a specific speed n q = 0.005-0.400 r/min. The measured Dp-Q curves were almost vertical beyond a certain pressure level, yielding a nearly pressure-independent volumetric efficiency of approximately 75%. The developed pump concept finally offers outstanding performance characteristics in an operation range where conventional gear pump concepts usually lose importance owing to unacceptably high volumetric losses.

show abstract

Section: Experimental Set-upmentioning

confidence: 99%

Development of a novel miniature high-pressure fuel pump with a low specific speed

Schiffer

Benigni

Jaberg

2013

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

show abstract

“…Some related works on the subject have addressed the issue of modeling a gear pump and its degradation modes. For example, Casoli et al [14] have proposed a method to model a gear pump with AMESim ® and Fritz and Scott have developed a wear model [15]. In this paper, the model is built with the software AMESim ® , based on the Bond Graph theory.…”

Section: B System Modelingmentioning

confidence: 99%

“…The Kriging surrogate model gives the estimation of the values of wBSV, wTBV and wHPSOV in function of both the context parameters and the degradations so is replaced by ( , , ) in Equ. 15. The design sites are constructed via a Latin hypercube sampling with = 400 .…”

Section: Kriging Modelmentioning

confidence: 99%

Diagnostics of an aircraft engine pumping unit using a hybrid approach based-on surrogate modeling

Lamoureux¹,

Massé²,

Mechbal

2013

2013 IEEE Conference on Prognostics and Health Management (PHM)

View full text Add to dashboard Cite

This document introduces a hybrid approach for fault detection and identification of an aircraft engine pumping unit. It is based on the complementarity between a model-based approach accounting for uncertainties aimed at quantifying the degradation modes signatures and a data-driven approach aimed at recalibrating the healthy syndrome from measures. Because of the computational time costs of uncertainties propagation into the physics based model, a surrogate modeling technic called Kriging associated to Latin hypercube sampling is utilized. The hybrid approach is tested on a pumping unit of an aircraft engine and shows good results for computing the degradation modes signatures and performing their detection and identification.

show abstract

“…The schematic diagram of the gear pump is shown in Figure 2. According to Rrith [3], where . Ps is the inlet pressure, Po is the outlet pressure, Qout is the flow at the gear pump outlet, b is the gasket width of the gear pump, L is the gear gap length, h; is the gear gap height of gears at discharge, U is the relative speed of gears and gaskets, ho is the minimal gear gap height, Oh is the change in gear gap of the high molecule solution, 1J.…”

Section: Gear Pumpmentioning

confidence: 99%

“…Defining input and output variants: In the article, the extruder screw speed, gear pump speed, and winding speed are observed, and the tensile strength and yarn count (denier) of as-spun fibers Defining fuzzying conditions of variants: input and output variants and the scope of the operation are considered according to the actual situation to determine the universe of discourse of every variant. The linguistic expressions and corresponding membership functions are assigned 3…”

mentioning

confidence: 99%

Using Fuzzy Theory to Predict the Properties of a Melt Spinning System

Kuo

Hsiao

2004

Textile Research Journal

View full text Add to dashboard Cite

Though the extruder screw speed of melt spinning, the gear pump's gear speed, and the winder's winding speed are the major factors affecting the tensile strength of as-spun fibers and yarn count (denier), no mathematical model has been proposed to describe the cause and effect of these phenomena. In general, chemical fiber manufacturers often adjust such speeds according to their experience, which is both time consuming and uneconomical. Moreover, once the input parameters are set, manufacturers rarely readjust them. Thus, it is difficult to satisfy the demand for product diversity in small quantities. In this paper, a mathematical model for calculating extruder screw speed, gear pump speed, and winder speed is proposed according to fuzzy theory to improve the quality of as-spun fibers and to make the process economically efficient.

show abstract

Wear in external gear pumps: A simplified model

Cited by 14 publications

References 2 publications

Development of a novel miniature high-pressure fuel pump with a low specific speed

Development of a novel miniature high-pressure fuel pump with a low specific speed

Diagnostics of an aircraft engine pumping unit using a hybrid approach based-on surrogate modeling

Using Fuzzy Theory to Predict the Properties of a Melt Spinning System

Contact Info

Product

Resources

About