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.

Rotary internal gear pump having teeth with asymmetrical trailing edges

Abstract: A trochoid type gear pump features an outer rotor formed with internal teeth and an inner rotor formed with external teeth which can be receivable in the external ones. The profiles of one or both of the internal and external teeth are rendered asymmetric and arranged to engage only in the region of an intake opening formed in the casing in which the two rotors are housed.

Planetary gear pump

Abstract: A pump wherein a central rotating gear drives flexible planet gears about its circumference and inside a circumferential ring gear shaped outer housing The space between the central rotating gear and the circumferential ring gear varies in cross sectional area to form a pumping chamber and communicates with inlet and outlet ports to permit pumping of fluid therethrough The variable shape of the pumping chamber is achieved through the use of non-concentric ring and sun gears, non-circular sun and ring gears, flexible segments in the ring gear, or a flexible sun gear

All hydraulic crane mounted on cross-country vehicle

Abstract: The utility model relates to an all hydraulic crane mounted on a cross-country vehicle which belongs to crane machinery. The utility model is characterized in that an integral type driving cab, vehicle chassis drive axle six wheels drive and an engine with upper and lower separated type dual configuration are adopted, a heating and a refrigeration facilities and an independent hydraulic operation system are arranged in an upper vehicle driving cab, and an adjustable chair is arranged in the driving cab. The integral type driving cab which is adopted by the utility model leads driver's view field to be wider and ensures safe running and comfortable operation. The vehicle chassis drive axle six wheels drive leads the performance of the cross-country vehicle to be improved and is particularly suitable for oil fields, topographic low areas and marshy areas. When the chassis trouble occurs, the engine with upper and lower separated type dual configuration are adopted, so the upper vehicle can be normally used still. When the engine of the upper vehicle trouble occurs, a gear pump is driven by a lower vehicle of the engine by a gear box and a force taking device, so the hoisting operation can be completed by transferring power to an upper vehicle hydraulic system by hydraulic oil. In addition, the upper and the lower vehicles can mutually assist in the operation of the hydraulic operation system, and 70% energy and the maintenance cost can be saved.

Group of full-circumferential-flow pumps and method of manufacturing the same

Abstract: A group of full-circumferential-flow pumps has a group of motors each comprising a main shaft, a rotor mounted on the main shaft, a stator disposed around the rotor, a cylindrical outer motor frame fitted over the stator, and an outer cylinder disposed around the cylindrical outer motor frame with an annular space defined therebetween, a group of pump parts oriented in opposite directions to meet different directions in which the main shafts of the motors rotate, and a group of frequency converters for energizing the motors to rotate at high speeds In order to meet rating requirements including flow rates and pump heads, the group of motors, the group of pump parts, and the group of frequency converters are combined to provide a group of single-suction-type full-circumferential-flow pumps that are powered by a commercial electric power supply and belong to a first type for applications to pump a fluid at a small rate under a low pump head, and a group of single-suction-type full-circumferential-flow pumps that are rotatable at high speeds and belong to a second type for applications to pump a fluid at a small rate under a high pump head