Method for sampling and diagnosing position sequences of reciprocating machine

A diagnostic method, a reciprocating technology, applied in the field of mechanical transmission, which can solve the problems of frequency ambiguity, inability to determine the location and severity of the fault, difficulty in implementation and operation, etc.

Active Publication Date: 2015-04-01
CHONGQING UNIV
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Problems solved by technology

[0004] The aforementioned research methods mostly use vibration signals as the research object in the fault diagnosis of reciprocating machinery, but due to the strong nonlinear motion of reciprocating machinery, sampling in time series will lead to problems such as inaccurate piston running position and ambiguous frequency. Some time-frequency analysis an

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  • Method for sampling and diagnosing position sequences of reciprocating machine
  • Method for sampling and diagnosing position sequences of reciprocating machine
  • Method for sampling and diagnosing position sequences of reciprocating machine

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Embodiment Construction

[0045] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0046] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or elem...

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Abstract

The invention discloses a method for sampling and diagnosing position sequences of a reciprocating machine. The method comprises sampling and diagnosing steps as follows: step one, trigger sequences are generated when N Hall sensors uniformly distributed on the side surface of a cylinder are close to a magnetic pole embedded in a piston, an acoustic emission sensor collects an acoustic emission position sequence of a corresponding position domain of each Hall sensor, a vibration acceleration sensor collects a vibration position sequence of a corresponding position domain of each Hall sensor, and an acoustic emission position sequence sampling matrix set and a vibration position sequence sampling matrix set are formed; and step two, according to the acoustic emission position sequence sampling matrix set formed by the acoustic emission position sequences and the vibration position sequence sampling matrix set formed by the vibration position sequences, the health condition of the reciprocating machine is judged in combination of definition of the acoustic emission position sequence sampling matrix set and the vibration position sequence sampling matrix set and diagnosis domains.

Description

technical field [0001] The invention relates to the field of mechanical transmission, in particular to a reciprocating mechanical position sequence sampling and diagnosis method. Background technique [0002] Reciprocating mechanical devices are widely used in the fields of industry, medicine, and automobiles and vehicles. The reciprocating mechanical piston crank structure plays the role of the power center. As a core key component, its health status directly affects the operating performance of the mechanical system. Due to the high cycle, high speed and other working environments of the piston crank structure, it is easy to cause cylinder scratches, sliding bearing failures, piston knocking and other failures, which greatly reduces the reliability and stability of the reciprocating mechanical working performance and brings economic benefits to the national economy. serious loss. [0003] At present, those skilled in the art have carried out a series of researches on the ...

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Application Information

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IPC IPC(8): G01M13/00
Inventor 邵毅敏王利明刘静郭放邓未叶维军曹正
Owner CHONGQING UNIV
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