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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.


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Patent
Voigt Dieter Dipl Ing1
29 Jun 1989
TL;DR: In this article, the meshing engagement of a gear pump gear wheel is adjusted by means of a piston, so as to be displaceable in the direction of the distance between the shafts (4, 5) of the two meshing wheels.
Abstract: In a gear pump, for the purpose of delivery rate control, one of the two meshing pump gear wheels (2, 3) is mounted, by means of a piston, so as to be displaceable in the direction of the distance between the shafts (4, 5) of the two gear wheels (2, 3), in order to vary the meshing engagement (Figure 1).

15 citations

Patent
15 Jul 1980
TL;DR: In this article, a hydraulic fluid drive for a land motor vehicle having front and rear drive wheels is described, where the first pump is connected to a hydraulic motor that drives a rear steerable wheel of the vehicle and a manually operated control is used to adjust the speed and torque of the front wheels.
Abstract: A hydraulic fluid drive for a land motor vehicle having front and rear drive wheels. An internal combustion engine drives a pair of positive displacement pumps. A first pump is connected to hydraulic motors that drive the front wheels of the vehicle. A second pump is connected to a hydraulic motor that drives a rear steerable wheel of the vehicle. A manually operated control is used to adjust the speed and torque of the motors for the front wheels. A front and rear wheel drive equalizing control operates in response to differences in hydraulic fluid pressure supplied to the front and rear hydraulic motors to equalize the fluid pressure pumped to the front and rear hydraulic motors so as to maintain the torque and speed of the front and rear wheels substantially constant. A foot operated lever is used to operate the control for the first pump for changing the supply of fluid pressure to the front wheel motors. The control apparatus includes a piston and cylinder assembly that interconnects the controls for the first and second pumps to control the second pumps in response to the hydraulic fluid output pressure of the first pump.

15 citations

Patent
09 Feb 1994
TL;DR: In this article, an improved apparatus for spraying hot melt adhesive includes a gear pump for providing a metered flow of hot-melt adhesive, which is applied to spray hot melt adhesives.
Abstract: An improved apparatus for spraying hot melt adhesive includes a gear pump for providing a metered flow of hot melt adhesive. When a valve member is in a first position, a predetermined rate of flow of hot melt adhesive is conducted from the gear pump to a nozzle. When the valve member is in the first position, the valve member blocks a flow of adhesive to a recirculation passage. When the valve member is in a second position, the valve member directs the flow of adhesive from the gear pump to the recirculation passage and blocks a flow of adhesive to the nozzle.

15 citations

Patent
04 Oct 2012
TL;DR: In this article, the authors proposed a permanent magnet generator-motor that eliminates the need for separate oil circulation device, a separate oil cooling device, and outside installation of oil pipes, that allows oil pipes to be routed in a simple configuration, and that has high cooling effect.
Abstract: PROBLEM TO BE SOLVED: To provide a permanent magnet generator-motor that eliminates the need for a separate oil circulation device, a separate oil cooling device, and outside installation of oil pipes, that allows oil pipes to be routed in a simple configuration, and that has high cooling effect.SOLUTION: A permanent magnet generator-motor includes: a housing 18; a bracket 2; a stator 1 that has a stator core 110 and armature windings 14; a rotor 130 that has a rotor core 131, a plurality of permanent magnets 133, and a shaft 6 that is rotatably supported by a bearing 5; and an oil reservoir that is formed by the housing 18 and the bracket 2. The housing 18 has a cooling water path 9 inside. In the bracket 2, a gear pump 4 is provided in conjunction with the bearing 5. The oil reservoir has: a main oil reservoir 7 where the armature windings 14 and the stator core 110 arranged at lower positions are immersed in oil; and an auxiliary oil reservoir 8 that is connected to the main oil reservoir 7 through a small hole 16. The gear pump 4 pumps oil up from the auxiliary oil reservoir 8 through an oil pipe 301 fitted in the small hole 16, and ejects the oil toward the armature windings 14 arranged at upper positions.

15 citations

Patent
19 Oct 2001
TL;DR: A sanitary pump with gear shaft bearing blocks in opposed cylindrical portions of a pump body bore, blocks constituting hand removable structural pump ends, sealed by O-rings and clamp plates.
Abstract: A sanitary pump with gear shaft bearing blocks in opposed cylindrical portions of a pump body bore, blocks constituting hand removable structural pump ends. Gear shaft bearings extending completely through blocks for easy cleaning, sealed by O-rings and clamp plates. Oval gear cavity bore between cylindrical portions of body bore extends only length of largest of interchangeable gears. Seals at end of gear cavity eliminate entrapment zones. Minimal intrusion of bearing blocks into gear cavity allows large operating temperature range. Shaft seals are contained in a hand removable cartridge. Complete pump disassembly by one manually operated clamp. Gear shaft diameters differ assuring correct assembly. Mount receives pump, tie rods sealing pump and securing to mount. Mount allows pump removal without changing pump-drive alignment. Pin and groove engagement of pump to mount allows 90° interval pump ports orientation. Pump displacement is altered with interchangeable gears and drive end bearing blocks.

15 citations


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