Abnormality diagnosis device and abnormality diagnosis method

Abstract

An abnormality diagnosis device used for a machine apparatus having a part rotating and sliding relative to a stationary member is provided with a detection section (31) and a signal processing section (81). The detection section (31) is fixed to the part rotating or sliding or to the stationary member and has a vibration sensor (32) and a temperature sensor (33). The signal processing section (81) determines the condition of the part based on a signal detected and outputted by the detection section (31). The signal processing section (81) determines whether there is an abnormality in the part, or whether there is an abnormality in the part and the degree of damage of the part.

Description

technical field [0001] The present invention relates to a fault diagnosis device and a fault diagnosis method for rotating or sliding parts of machine equipment such as shafts or gearboxes of railway vehicles or reduction gears of wind power generators. Specifically, the present invention relates to a fault diagnosis device and a fault diagnosis method for specifying the presence or absence of a fault or a symptom of a fault of a component, or a faulty part thereof. Background technique [0002] Traditionally, in rotating parts of railway vehicles, wind generators, etc., bearings or other rotating parts are regularly inspected for damage, wear, etc. after a constant period of use. Periodic inspections are carried out by dismantling the machine equipment integrated with the rotating parts, and the damage or wear occurring at the rotating parts is found through the optical observation inspection by the person in charge. In addition, as major defects found through inspection, ...

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Problems solved by technology

In addition, as major defects found through inspection, in the case of bearings, there are indentations by erosion of impurities, and exfoliation due to rolling fatigue or other wear, etc., and in the case of gears, there are teeth Chipping, wear, etc. of parts, in the case of wheels, there is grinding, etc., and in any case, when dents and protrusions, wear, etc., which do not exist in a new product are found, replace the product with a new one

[0003] However, in the method of dismantling the entire machine equipment and inspecting it by optical observation by a person in charge, in the dismantling operation of removing the rotating part or sliding part from the device, or in reintegrating the rotating part or sliding part In the operation of the inspection, a lot of labor is required, which causes a problem that the maintenance cost of the device is significantly increased

[0004] In addition, when reintegrating the device, there is a possibility that the inspection itself causes a defect in the rotating part or sliding part, so that a strike mark (strike mark) that did not exist before the inspection is generated in the rotating part or sliding part, etc.

In addition, when a large number of bearings are inspected by optical observation within a limited period of time, it also raises the problem that there is still a possibility of missing defects

In addition, there are individual differences in determining the degree of defect, and parts are replaced even when there are basically no defects, thus generating wasteful costs

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