关键词: 离心式注水泵, 振动, 复合知识库, 自动诊断, 模糊数学

Abstract: The large centrifugal pumps are widely used as the waterflooding for oil production in the fields,stabilizing and increasing the production of the crude oil.Their most of working problems of the units are caused by the vibration faults.This paper discusses the vibration-signal-based auto-diagnosis technology and system for the centrifugal pumps on basis of fuzzy mathematics and puts forward the concept and method of Compound Knowledge Base (CKB) according to the structural features of pumps,which effectively overcomes the shortages of the traditional expert system.The detecting methods,characteristic parameters and fuzzy inference of the pump units are confirmed in this paper.And the corresponding system software is also developed.Application of the system to waterflooding pumps has obtained better results in oil field.

Key words: centrifugal waterflooding pump, vibration, auto-diagnosis, Compound Knowledge Base, fuzzy mathematics