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.

Gearbox drive for a speedometer

Abstract: A gearbox drive that adapts the drive train ratios of vehicles to standard speedometers, including an input gear, an intermediate gear and an output gear rotatable about axes defining an equilateral triangle, arranged so that upon rotation of the input shaft in either direction, the reaction forces on the intermediate gear will be substantially balanced. The gears are supported in mating cup-shaped input and output gear cases with the input gear case member having an input gear bearing and two secondary bearings each of which selectively supports either the intermediate gear or the output gear. The output gear case member has an output gear bearing and two secondary bearings each of which selectively supports either the intermediate gear or the input gear. By rotating the output gear case member 120 degrees with respect to the input gear case member during assembly and reversing the relative positions of the input and output gears, the same force balance on the intermediate gear is achieved for rotational motion of the input gear in either direction. The gearbox also accommodates reverse rotation of the output gear by eliminating the intermediate gear and directly meshing the input and output gears. The gear case members are constructed of plastic to reduce the weight and cost of the gearbox, while certain bushings along with the gears and their supporting shafts are constructed of steel to maintain the reliability, strength and integrity of the gearbox.

Gear pump with meshing internal and external toothed wheels

Abstract: The gear pump has an inner gearwheel with external teeth eccentrically mounted inside an outer gearwheel with internal teeth. The housing in which the gearwheels fit has an inlet (45) and an outlet (46) connection at right-angles to each other, extending radially towards the cylindrical chamber in which the gearwheels rotate. There is a filler piece (36) in the crescent-shaped space between the two gearwheels. This has a D-section support rod (38) at its leading edge with its ends held in the side cheeks of the housing. There is a curved, tapered carrier piece (65) behind this rod, supporting a curved sealing strip (66).

Magnetically driven gear pump

Abstract: A magnetically driven gear pump having a housing, a rotatable annular magnetic drive assembly magnetically coupled to but spaced from an annular driven magnet and rotor gear assembly with an annular canister disposed therebetween, and wherein when the annular magnetic drive assembly is rotated, the annular driven magnet and rotor gear assembly rotate on a first shaft portion of an offset stationary shaft and the rotor gear drives an idler gear that rotates on a second shaft portion of the offset stationary shaft.

Effect of Pressure on the Flow Properties of Magnetorheological Fluids

Abstract: Magnetorheological (MR) fluids are widely used in the industrial world; however, sometimes their properties fail to meet system requirements. In shear mode, MR fluids have been found to exhibit a pressure dependency called squeeze strengthen effect. Since a lot of MR fluid based devices work in flow mode (i.e., dampers), this paper investigates the behavior in flow mode under pressure. The system design consists of three steps: the hydraulic system, the magnetic circuit, and the design of experiment method. The experimental apparatus is a cylinder in which a piston displaces the fluid without the use of standard gear pumps, which are incompatible with MR fluids. The experimental apparatus measures the yield stress of the MR fluid as a function of the pressure and magnetic field, thus, enabling the yield shear stress to be calculated. A statistical analysis of the results shows that the squeeze strengthen effect is also present in flow mode, and that the internal pressure enhances the performance of MR fluids by nearly five times.