External gear pump and electric lubricating oil pump

Abstract

The invention discloses an external gear pump and an electric lubricating oil pump. The electric lubricating oil pump includes the external gear pump and an installation plate. The external gear pumpis arranged on the installation plate through a screw. The external gear pump includes a pump shell with a pump chamber formed through buckling an upper shell and a lower shell, and two gears which are externally meshed with each other and are arranged in the pump chamber through bearings. The gears are driven to rotate by a motor. An end surface of the pump chamber includes an oil inlet groove,and the oil inlet groove is extended along a rim direction of each gear and is superposed with gear teeth of at least part of the gears on the side of an oil inlet cavity. At least one side of each gear is provided with the oil inlet groove, and the oil inlet groove is connected with an oil inlet pipeline. By adopting methods of supplementing oil from the side of the gear and supplementing oil through a tooth crest superposition mode, an area of the oil inlet cavity is increased, oil intake of a single tooth crest direction is reduced, and an insufficient filling phenomenon of lubricating oilcaused by a radial centrifugal force is avoided. A vibration noise and flow drop caused by cavitation are eliminated, and power losses of the electric lubricating oil pump are reduced.

Description

technical field [0001] The invention relates to the technical field of machinery, in particular to an external gear pump, in particular to an electric lubricating oil pump used in a lubricating oil system of a gas turbine engine. Background technique [0002] At present, most gas turbine engines use circulating lubricating oil systems, which use lubricating oil to cool and lubricate key components to increase their life and ensure the normal operation of core components. [0003] The lubricating oil pump is the power source for lubricating oil pressurization and delivery in the lubricating oil system, and is a key component of the lubricating oil system. Especially in the field of aviation, due to its extremely harsh working environment and performance requirements, it has always been a technical problem to ensure its environmental adaptability and performance stability. When the traditional external gear lubricating oil pump is running at high speed, the lubricating oil is...

AI Technical Summary

Problems solved by technology

[0004] One of the objectives of the present invention is to provide an external gear pump and an electric lubricating oil pump to solve the technical problems of vibration, noise and flow drop caused by cavitation in the prior art

[0005] One of the purposes of the present invention is to provide an external meshing gear pump and an electric lubricating oil pump to solve the technical problems of poor integration, large volume and heavy weight of the electric lubricating oil pump in the prior art

[0006] One of the purposes of the present invention is to provide an external gear pump and an electric lubricating oil pump to solve the technical problems of large reactive power loss and easy heating of oil in the prior art

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