Two-stage series-connection high-pressure fuel pump

Abstract

The invention discloses a two-stage series high-pressure fuel pump, which comprises a motor, a main pump driving gear, a main pump driven gear, a secondary pump driving gear, a secondary pump driven gear, a main pump floating bearing assembly, and a main pump fixed bearing assembly , the secondary pump floating bearing assembly, the secondary pump fixed bearing assembly, the main pump compensation spring and the secondary pump compensation spring, the flange at the left end of the main pump casing and the flange surface at the right end of the secondary pump casing are provided with sliding pins The matching axial hole and the annular groove matching the sealing ring, the left end face of the main pump flange is provided with a positioning block matching the groove on the right end face of the secondary pump flange, and on the outside of the above two flanges Screw holes are evenly distributed, the driving shaft of the main pump is driven by a motor, and the left end of the main pump shaft is provided with an external spline that engages with the internal spline of the coupling sleeve, and the internal spline at the left end of the coupling sleeve is in contact with the The external spline on the right end of the secondary pump shaft engages. The invention has the advantages of light weight and small spatial dimensions.

Description

Technical field: [0001] The invention relates to an oil pump, in particular to a two-stage serial high-pressure fuel pump. Background technique: [0002] The existing high-pressure fuel pumps of the engine are two independent fuel pumps. Due to the improvement of the comprehensive performance requirements of the engine, the two fuel pumps have a large weight and a large space size, which cannot meet the requirements of the new engine. Invention content: [0003] The object of the present invention is to provide a two-stage series high-pressure fuel pump with light weight and small space size. [0004] The technical solution for realizing the purpose of the present invention is a two-stage series high-pressure fuel pump, including a motor, a main pump driving gear, a main pump driven gear, a secondary pump driving gear, a secondary pump driven gear, a main pump floating bearing assembly, The fixed bearing assembly of the main pump, the floating bearing assembly of the seco...

AI Technical Summary

Problems solved by technology

[0002] The high-pressure fuel pump of the existing engine is two independent fuel pumps. Due to the improvement of the overall performance requirements of the engine, the weight and space of the two fuel pumps are large, which cannot meet the requirements of the new engine.

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