Multi-union lubricating oil pump set easy to maintain and low in pressure pulsation

Abstract

The invention discloses a multi-union lubricating oil pump set easy to maintain and low in pressure pulsation. The multi-union lubricating oil pump set comprises a pump set shell, first-stage oil supply pumps, multi-stage oil scavenging pumps, an end cover and a sealing base plate, inner rotors and outer rotors of the oil supply pump and the oil scavenging pump are driven by the same transmission shaft, and the oil supply pump and the oil scavenging pump are both arranged in the pump set shell; an end cover is fixed to the left end of the pump set shell, inlets of the multiple oil scavenging pumps and outlets of the multiple oil supply pumps are arranged on a flange on the right end face of the pump set shell, the flange is in butt joint with the pipeline end face of an engine accessory casing, a sealing base plate is fixed to the flange through a mooring screw, and the flange is in threaded connection with the engine accessory casing through mooring screws; and each oil supply pump comprises two pairs of rotors, and the two pairs of rotors are arranged in the circumferential direction at an interval of half a work cycle. The multi-union lubricating oil pump set improves the product maintainability and the external field maintainability, reduces the oil pump outlet pressure and flow pulsation and improves the working stability of a lubricating oil system.

Description

[Technical field][0001]The present invention relates to the technical field of oil pump sets for aerospace engine oil systems, in particular to a technical field of easy-to-maintain low pressure pulsating multi-slip pump sets.【Background technique】[0002]At present, the oil pump set used by the aerospace engine oil system is mostly the pipeline out of the structure, and the pumps are set separately, and the exit pipe joints are set separately, and the sealing circle slots are set separately at each pipe joint. The oil pump set and the engine accessory casing are docked with a separate screw and the casing connection. A pair of internal rotors and outer rotors per stage pump.[0003]The following defects are prior art:[0004]a) Conventional products all levels of pumps individually, export pipe joints, separately set the sealing circle in each pipe joint, using an O-seal ring seal, the outer spot disassembly and installation time, and the O-seal is not easy to operate. Easy to miss O-sea...

AI Technical Summary

Problems solved by technology

[0004] a) The pumps at all levels of conventional products are provided with a separate inlet and outlet pipe joint, and each pipe joint is separately provided with a seal ring groove that is sealed with an O-ring. It is easy to miss the O-ring;

[0005] b) The connection between the product and the system is fastened with a separate screw and the system. The screw is easy to lose after being removed, and the screw needs to be prepared in advance and placed in the screw hole when installing the screw. The operation steps are many and time-consuming;

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