Pressure self-supply hybrid sliding bearing applied to gear pump

Abstract

The invention discloses a pressure self-supply hybrid sliding bearing applied to a gear pump. The power in the gear pump is input through a driving gear shaft, a driven gear shaft is driven to rotatethrough the gear engagement effect, the fluid entering from a low pressure inlet is extruded, the fluid entering a high pressure chamber becomes high pressure fluid, most of the high pressure fluid ispumped out of a high pressure outlet, a small amount of the high pressure fluid enters a communication groove through a high pressure oil supply groove on the end face of the high pressure chamber and then enters axial high pressure through grooves and a plurality of circumferential bearing oil inlet grooves, the high pressure fluid from the bearing oil inlet grooves flows into bearing pressure chambers on the inner wall surface of the hybrid sliding bearing to support the driven gear shaft and the driving gear shaft, the fluid flowing out of the bearing pressure chambers is restored to low pressure, the low pressure fluid flows out from both ends of the hybrid sliding bearing and returns to a low pressure chamber through bearing side oil drain grooves and oil drain guide grooves and thenis squeezed into the high pressure chamber again, and continuous operation of the gear pump is guaranteed.

Description

technical field [0001] The invention belongs to the field of mechanical design and sliding bearings, in particular to a pressure self-supply dynamic and static sliding bearing applied to a gear pump. Background technique [0002] The fuel system is the only source of power for the aero-engine, once the fuel is cut off during the combustion process, it will cause serious consequences. Normal and continuous supply of fuel is the prerequisite to ensure the stable operation of the aero-engine, so the fuel gear pump is one of the core components of the engine. At present, aeroengine fuel gear pumps generally adopt two-stage compression of centrifugal pump and gear pump. The gear pump rotor is generally supported by dynamic pressure sliding bearings, directly uses aviation fuel as a lubricating medium, and relies on the dynamic pressure effect to generate bearing capacity. With the development of aero-engines with high thrust ratio and high power, the outlet pressure of gear pump...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a pressure self-supply dynamic and static sliding bearing applied to gear pumps, which provides high pressure oil for the dynamic and static sliding bearings by guiding the high-pressure fluid of the fuel gear pump. Under the condition of heavy load, the thickness of the oil film is too small, which is easy to cause problems such as rubbing, gluing, and low reliability.

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