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Diagnosis method for large axial vibration of bearing pedestal due to foundation loosening

A technology of axial vibration and diagnostic methods, which is applied in vibration testing, testing of mechanical components, testing of machine/structural components, etc., can solve problems affecting production, increase detection strength, etc., to avoid equipment damage, simple operation, The effect of eliminating hidden dangers

Active Publication Date: 2015-09-02
SICHUAN HONGJIAN HEAVY MACHINERY MFG
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Problems solved by technology

[0003] In order to overcome the deficiencies of the existing vibration diagnosis method for bearing housings, which ignore the detection of foundation screws, resulting in increased detection strength and affecting production, the technical problem to be solved by the present invention is to provide a simple, convenient and applicable method that can quickly determine whether the foundation screw is Diagnosis method for large axial vibration of the bearing seat due to loose screws

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  • Diagnosis method for large axial vibration of bearing pedestal due to foundation loosening
  • Diagnosis method for large axial vibration of bearing pedestal due to foundation loosening

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Embodiment

[0027] Such as figure 2 Shown is a schematic diagram of the structure of a cantilever fan. The rotor of the fan is supported by two bearing seats. The bearing seat close to the motor is the load end bearing seat, and the one far away from the motor is the non-load end bearing seat. When it is necessary to detect the bearing seat at the load end, place the vibration sensor on the top 1, the horizontal position 2 and the axial side 3 of the bearing seat in sequence, measure three sets of data at each position, and then obtain the average value. Then compare the vibration values ​​at the three positions with the standard values. If it is found that the vibration values ​​at the top 1 and horizontal position 2 are less than 4.5mm / s, and the vibration value at the axial side 3 is greater than or equal to 7.1mm / s, turn to If the frequency is dominant, it can be judged that the axial vibration is too large, and then the base plate 5 and the base screw 4 are tested. First move the v...

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Abstract

The invention discloses a diagnosis method for large axial vibration of a bearing pedestal due to foundation loosening and belongs to the field of a bearing pedestal vibration detection technology. The method comprises the following steps: measuring vibration values of the bearing pedestal respectively in a vertical direction, a horizontal direction and an axial direction; comparing the vibration value in each direction with a standard value, and determining whether the bearing pedestal is safe, and a main vibration direction and a dominant frequency; testing and comparing vibration values of foundation screws and a foundation slab where the bearing pedestal is disposed; and fastening the screws with quite large vibration values under the condition that shutdown is not carried out, and detecting the vibration values of the foundation screws again. According to the invention, fault reasons why the axial vibration of the bearing pedestal is large can be rapidly found in an onsite test process, whether faults are caused by the foundation loosening is determined, the operation of a whole diagnosis process is quite simple and convenient, normal production is not affected, and fault hidden trouble can also be eliminated so as to prevent damage to equipment.

Description

technical field [0001] The invention relates to the technical field of vibration detection of bearing seats, in particular to a diagnostic method for quickly detecting whether the axial vibration of the bearing seat is large due to loose foundation. Background technique [0002] In the existing equipment fault diagnosis technology, it is more complicated to judge the large axial vibration fault of the bearing seat. There are several reasons for the large axial vibration of the bearing seat. Periodic changes cause the axial deflection of the bearing seat. The detection method is to check the journal runout; the second is caused by the asymmetrical distribution of the support stiffness of the bearing seat. The detection method is to measure the anchor screws, foundation plate, The vibration value of the cement foundation is judged by whether the difference vibration is greater than 5um; the third is caused by misalignment, and the detection method is to check the straightness ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02G01M13/00
Inventor 唐安全刘宏张再春郑超
Owner SICHUAN HONGJIAN HEAVY MACHINERY MFG
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