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Gear pump

About: Gear pump is a research topic. Over the lifetime, 7490 publications have been published within this topic receiving 38837 citations. The topic is also known as: Gear pump.


Papers
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Journal ArticleDOI
TL;DR: In this paper, a gear micropump with alternate rotors of a polymer composite material (PCM): PEEK, PPSGF40, POM-C, and PA6 was studied.

13 citations

Patent
13 Mar 1998
TL;DR: In this paper, a positive displacement gear pump using a drive gear and an idler gear is described, where the drive gear has symmetrical teeth and the idler has asymmetrical teeth.
Abstract: A positive displacement gear pump useful for pumping hydraulic fluid includes a drive gear and an idler gear. In a first embodiment, the drive gear has symmetrical teeth, whereas the idler gear has asymmetrical teeth. The asymmetrical teeth of the idler gear include working surfaces which have a profile corresponding to the profile of the working and non-working surfaces of the drive gear, but have a non-working surface which has been relieved so as to be substantially flat. Consequently, in the zone of the pump where the gears mesh, a large backlash is created which substantially prevents bubble formation. In a second embodiment, the drive gear, as well as the idler gear, have non-contact surfaces which are substantially flat to create even a larger backlash for relieving cavitation when the teeth are made wider in the axial direction. By preventing bubble formation, cavitation which occurs at high pump speeds is substantially eliminated, thus avoiding pump damage which results from cavitation.

13 citations

Patent
05 Mar 1993
TL;DR: In this paper, an apparatus for automatically assembling an inner rotor and an outer rotor substantially applied to an inscribe-type gear pump is described, in such a way that a holding pin which is pressed into a central hole of inner rotor descends together with the inner rotor until the accompanying inner rotor is filled into outer rotor.
Abstract: An apparatus for automatically assembling an inner rotor and an outer rotor substantially applied to an inscribe-type gear pump. Described is the construction and the function of the apparatus for incorporating inner rotors into outer rotors in such a manner that a holding pin which is pressed into a central hole of inner rotor descends together with the inner rotor until the accompanying inner rotor is filled into outer rotor. While the holding pin is lowered together with inner rotor, it is rotated so that gear portions of both rotors can be aligned properly and engage.

13 citations

Journal ArticleDOI
01 Mar 1994-Wear
TL;DR: In this article, it is confirmed that wear occurs at regions of close clearance and a proposal is given to aid the evolution of fundamental wear modelling as applied to an actual external gear pump.

13 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202320
202251
202154
2020137
2019198
2018276