Fault diagnosis method for damping springs of vibrating screen

Abstract

The invention discloses a fault diagnosis method for damping springs of a vibrating screen and belongs to spring fault diagnosis methods. The method includes: subjecting actual measured static deformation values of four springs without faults and actual measured static deformation values of the four springs with faults to one-to-one corresponding substraction, and implementing fault spring diagnosis under a static state; and analyzing actual measured free vibration response at four spring supports of the vibration screen after the springs fail, and implementing fault spring diagnosis under a dynamic state by utilizing a three-dimensional bar chart and a three-dimensional spectrum array. When diagnosis results under the two states are uniform, the diagnosis results can be considered as a diagnosis result, when the diagnosis results under the two states are nonuniform, the steps need to be repeated until the diagnosis results are uniform. The fault diagnosis method for the damping springs of the vibrating screen has the advantages that four displacement sensors and a collect card are adopted, so that equipment is simple, input is small, and mounting is convenient; with the hardware configuration, static and dynamic spring fault diagnosis methods are mutually combined to realize high-precision diagnosis, the dynamic spring fault diagnosis method can be carried out during the process of free vibration when the vibrating screen stops working, and no other power input is needed.

Description

technical field [0001] The invention relates to a fault diagnosis method for a spring, in particular to a fault diagnosis method for a damping spring of a vibrating screen. Background technique [0002] In the coal preparation industry, a single metal cylindrical helical compression spring or a parallel combination of multiple such springs is usually used to form the main damping device of the vibrating screen. Due to the long-term static and dynamic pressure loads, the springs in actual production often suffer from severe distortion, cracks in the spring wire, damage or failure such as jamming or insufficient spring force. Under strong alternating loads, if the spring wire damage caused by fatigue or collision friction cannot be detected and eliminated in time, the material properties and actual stiffness of the spring will be affected microscopically, so that the nonlinear transfer characteristics will be significantly enhanced and the design standards will not be met. , ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for diagnosing the vibration damping spring of the vibra

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