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.

Fundamental gear system architecture

Abstract: A fan drive gear system for a gas turbine engine includes a gear system that provides a speed reduction between a fan drive turbine and a fan and a mount flexibly supporting portions of the gear system A lubrication system supporting the fan drive gear system provides lubricant to the gear system and removes thermal energy produced by the gear system The lubrication system includes a capacity for removing thermal energy equal to less than about 2% of power input into the gear system

Continuous gear change mechanism

Abstract: Acontinuous gear change mechanism which includes an input shaft, an output shaft, interlocking cogged wheels, a hydrostatic transmission and a epicycloidal gear. The hydrostatic transmission includes both a hydraulic pump and a motor being at least one of these components of the hydrostatic transmission in gear with one of the epicycloidal gear components. Two other components of this epicycloidal gear interlock with separate and independent portions of the input shaft. At least, in addition, the pump is of variable-flow type and is reversible in its operation.

Gear pump with low pressure shaft lubrication

Abstract: A gear pump is disclosed wherein the shafts of at least a pair of intermeshing gears are rotatably supported in bushings each with an axially extended lubrication groove formed in the bore of the bushing, one end of the lubrication groove being communicated through a low pressure chamber defined in the inner end face of the bushing with a portion of a suction port located adjacent to the root or dedendum circle of the gear while the other end of the lubrication groove being communicated with the suction port through a hole extended through the bushing or casing or notch formed therein, whereby part of the liquid drawn through the suction port upon rotation of the intermeshing gears is forced into the pressure chamber because of the fact that the liquid drawn into each tooth space of the gear is imparted with the impact speed directed in the radial direction of the tooth space due to the difference between the speed with which the liquid is drawn into the gear pump and the rotational speed of the intermeshing gears, and the liquid is circulated from the low pressure chamber through the lubrication groove, thereby lubricating and cooling the shafts rotating in the bushes.

Liquid power driven coating apparatus

Abstract: A coatings application apparatus pumps liquid paint through a flexible conduit within a rotary variable displacement peristaltic pump to a conventional applicator head. Through constant speed rotating lobes peristaltic action squeezes coating liquid within the conduit through the paint applicator control handle and applicator. The control handle permits changes in the paint flow rate. Upon constriction of the conduit within the control handle, flow rate is reduced, back pressure develops with resulting tube distortion. Distortion levered forces act upon a pre-set loaded pump spring. Variation in pump displacement results. The liquid flow rate within the supply conduit is inversely proportional to the back pressure so developed. If fluid flow is completely arrested by full supply tube constriction, back pressure becomes a maximum and pump displacement becomes zero. The pump continues to operate, however, at constant R.P.M., requiring no high starting torque. The pump unit employes two reverter train speed reduction systems in tandem. A conventional planetary or epicyclic gear system provides a first reduction in R.P.M. The pump rotor element itself, as a secondary reduction unit, allows economy in selection of a high speed, low power, motor drive for the peristaltic pump.