A Shafting Vibration Experiment and Analysis Method for Reciprocating Equipment

Abstract

The invention discloses a shaft system vibration experiment and analysis method of reciprocating equipment, comprising the following steps: S1, establishing a comparison characteristic database of a standard shaft system; S2, obtaining a mean square rooted kurtosis index at the working speed of the shaft system to be tested x RMS1 , peak index B 1 and kurtosis index K 1 ; S3, the X obtained in step S2 RMS1 , B 1 、K 1 , and the root mean square kurtosis index X at the operating speed in the comparative characteristic database of the standard shafting system RMSs , peak index Bs and kurtosis index Ks for comparison; S4, analyze whether there is mass imbalance in the shaft system to be tested; S5, establish the equivalent model of the shaft system to be tested, and propose a vibration reduction scheme for the shaft system. The invention provides a vibration experiment and analysis method for the shafting of the reciprocating equipment that is guided by the detection and analysis of the unbalanced excitation and resonance area of ​​the shafting of the reciprocating equipment through analysis from the detection means, signal processing and establishment of a feature library.

Description

technical field [0001] The invention relates to the technical field of shaft system vibration detection of reciprocating equipment. More specifically, the present invention relates to a vibration experiment and analysis method of a reciprocating equipment shaft system. Background technique [0002] The shafting vibration of reciprocating equipment is very complicated, and there are many influencing factors, such as unbalanced excitation force on the shafting, shafting resonance, and other factors. Shafting is the key moving part of reciprocating equipment. Severe shafting vibration will affect the performance of the equipment and even cause damage to parts. Shafting vibration includes not only the lateral vibration of the shaft, but also the torsional vibration of the shaft. For reciprocating equipment, its torsional vibration is more subtle and difficult to find, which often leads to fracture of couplings and shafts. Therefore, it is of great significance to analyze the ...

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Problems solved by technology

[0004] However, the shaft system of reciprocating equipment is more complex than that of centrifugal rotating equipment. At present, there are still some limitations when evaluating the state of the shaft system by collecting lateral vibration signals and torsional vibration signals

For example, the vibration signal measured at the 6 parts of the bearing includes the vibration information of the bearing, crankshaft, connecting rod, etc., and it is very difficult to extract the information of a certain part from it. Therefore, it is difficult to quantitatively analyze the influence of the vibration factors of the shaft system

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