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 Nov 1989TL;DR: In this article, a marine contra-rotating propeller system consisting of a large gear driven by an engine, and a plurality of small gears disposed so as to respectively mesh with the large gear at fixed positions along the circumference of the large gears.
Abstract: A marine contra-rotating propeller system comprises a large gear driven by an engine, and a plurality of small gears disposed so as to respectively mesh with the large gear at a plurality of fixed positions along the circumference of the large gear. Planet gears are respectively mounted to the gear shafts of the small gears. A sun gear and an inner-toothed gear are respectively meshed with the planet gears. A rear propeller is mounted to an inner shaft serving as a gear shaft of the sun gear. A front propeller is mounted to a tubular outer shaft serving as a gear shaft of the inner-toothed gear. The present invention can eliminate, with the simple construction, the inconvenience caused by a differential planetary gear operations in the prior art, can derive a propeller efficiency to the maximum extent.
21 citations
Patent•
24 Nov 1936
TL;DR: In this article, a hydraulic change speed and reversing gear of the type consisting of a pump and motor each having pistons or vanes carried in radial cylinders or slots in the pump and motors bodies and in which the pump body is driven by the driving shaft, the motor body being carried...
Abstract: This invention relates to hydraulic change speed and reversing gear of the type consisting of a pump and motor each having pistons or vanes carried in radial cylinders or slots in the pump and motor bodies and in which the pump body is driven by the driving shaft, the motor body being carried...
21 citations
Patent•
10 Jan 1986TL;DR: A two stage mixing gear pump for dispersing a gas into a liquid is described in this article, where a metered quantity of liquid from the first stage of the pump is supplied to gas filled intertooth spaces of the second stage pump.
Abstract: A two stage mixing gear pump for dispersing a gas into a liquid wherein a metered quantity of liquid from the first stage of the pump is supplied to gas filled intertooth spaces of the second stage pump The gas is introduced into the intertooth spaces of the second stage of the pump through a gas inlet which is adjacent the low pressure side of the gear teeth meshing zone of the second stage of the pump and the liquid enters the gas containing intertooth spaces downstream of the gas inlet
21 citations
TL;DR: In this paper, an external noncircular gear drive is proposed to cancel low-frequency and large-amplitude flow ripples given by non-circular rotors completely, whose pitch curves are identified by the residue theorem.
21 citations
Patent•
07 Jun 1995
TL;DR: In this article, a coextrusion system employs two or more extruders, each with a gear pump at its output connected to a co extrusion die, and the gear pumps permit precise variation of the relative content of the materials extruded by the several extruders lengthwise along the extrudate.
Abstract: A coextrusion system employs two or more extruders, each with a gear pump at its output connected to a coextrusion die. Different materials are extruded by each extruder. Varying the speed of one or both gear pumps varies the content of the extrudate. The gear pumps permit precise variation of the relative content of the materials extruded by the several extruders lengthwise along the extrudate. A display of a cross sectional dimension of the extrudate along a length of the extrudate permits observation of the lag that occurs between alteration of gear pump speed (or air pressure in the case of tubular or blown sheet extrudates) and the resultant change in dimension, so that a speed correction can be made at the appropriate time to compensate for differing shrinkage and stretching characteristics between the several extruded materials.
21 citations