Topic
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.
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Patent•
28 Dec 1978
TL;DR: A gear pump has a pair of externally meshed gears, and an inlet port and an outlet port on respective sides of the zone of mesh of the gears as discussed by the authors, and the gears have their non-working flanks relieved so as to increase an inter-tooth volume lying between two adjacent contact areas of the gear, this inter tooth volume first decreasing and then increasing as the gears rotate.
Abstract: A gear pump has a pair of externally meshed gears, and an inlet port and an outlet port on respective sides of the zone of mesh of the gears. The teeth of the gears have their non-working flanks relieved so as to increase an inter-tooth volume lying between two adjacent contact areas of the gears, this inter-tooth volume first decreasing and then increasing as the gears rotate. The relief of the non-working flanks is such that each successive inter-tooth volume communicates with the inlet port before that volume increases from its minimum value.
13 citations
TL;DR: The results underline that reliability and accuracy of this kind of model should be evaluated with respect to a population of pumps, defined on the basis of a statistical approach, since referring to a single pump sample may easily lead to an over/under-estimate of the quality of the proposed model.
13 citations
01 Apr 2013
TL;DR: In this paper, the authors studied the theoretical flowrate characteristics of conjugated internal gear pumps and obtained some generalized conclusions to guide the design of internal gear pump, and applied a double envelope concept to derive the mathematical models of the conjugation.
Abstract: The aim of this article is to study the theoretical flowrate characteristics of the conjugated involute internal gear pump. The conjugated involute internal gear pump has a different internal gear, the profile of which is completely conjugated to that of pinion, from the conventional involute internal gear pump. To describe briefly, the former pump is called ‘conjugated pump’ while the latter pump ‘conventional pump’. This structure makes the conjugated pump have smaller volumes of trapped fluid than the conventional pump, which indicates the conjugated pump has a better flowrate performance. Although there have been numerous investigations into gear pumps, none of them have dealt with the conjugated pumps yet. This article presents a systematic study on the theoretical flowrate characteristics of the conjugated pumps. It is expected to obtain some generalized conclusions to guide the design of internal gear pumps. Firstly, a double envelope concept is applied to derive the mathematical models of the conj...
13 citations
Patent•
17 Jun 1999
TL;DR: In this article, the authors propose to obtain high driving torque by a compact constitution and small structure space by providing a transmission device connecting with the front side of a differential gear with the axial direction through part and passing one of output shafts of the differential gear through the through part.
Abstract: PROBLEM TO BE SOLVED: To obtain high driving torque by a compact constitution and small structure space by providing a transmission device connecting with the front side of a differential gear with the axial direction through part and passing one of output shafts of the differential gear through the through part. SOLUTION: Rotation of a rotor 9 drives a sun gear 25 of a planetary gear 23 for enhancing torque integrated to a rotor shaft 17 via the rotor shaft 17, the sun gear 25 is supported by an engaging part 30 arranged in a fixed type of a hollow gear 31, a planetary gear 27 engaged to the sun gear 25 is driven and a planetary carrier 29 carrying this gear 27 is rotated. A differential gear casing 35 and a differential shaft 37 which are fixed/coupled to/with this carrier 29 are rotated, rotatable differential pinion 39 and differential side shaft gear 41 are engaged to the shaft 37, and output shafts 43, 45 are driven by a differential gear 33. The output shaft 45 is rotatably supported within the rotor shaft 17 as a hollow shaft 19. Therefore, the drive unit can be arranged between drive wheels by a compact structure. COPYRIGHT: (C)2000,JPO
13 citations