Gear pump hydraulic transmission and control technology

In hydraulic transmission and control technology, gear pumps account for a large proportion and are applied in mechanical products such as machine tools, light industry, metallurgy, construction, ships, airplanes, automobiles, and petrochemicals. Its main characteristics are: simple structure, small volume, light weight, good self-priming, low pollution sensitivity, high performance, long service life, easy maintenance, and low price. At the same time, gear pumps also have some shortcomings, such as small displacement, large flow and pressure pulsation, high noise, and low high-temperature efficiency. These shortcomings are significant in some improved gear pumps, but further research is needed to address them. Gear pumps are volumetric rotary pumps, and their working principle is to use the periodic changes in the working volume formed in the sealed housing by the disengagement and engagement sides of a pair of gear teeth to achieve fluid transport.