A method for detecting dynamic balance faults of multi-disk shafting of rotating machinery without test weight

A technology for rotating machinery and balancing faults, which is applied in static/dynamic balance testing, measuring devices, and testing of machine/structural components. It can solve difficult problems, achieve high accuracy, reduce the risk of dynamic balance tests, and improve The effect of dynamic balance test efficiency
CN110579312BActive Publication Date: 2021-04-20JIANGSU FRONTIER ELECTRIC TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU FRONTIER ELECTRIC TECH
Publication Date
2021-04-20

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Abstract

The invention discloses a method for detecting dynamic balance faults of multi-disc shafting of rotating machinery without test weight. By testing the frequency response function between the vibration of the bearings on both sides of the rotor and the impact force received by the journal, according to the actual measurement of the two ends of the rotor The excitation force on the journals on both sides of the rotor is calculated based on the vibration of each bearing, and the unbalanced force is eliminated through the dynamic balance weights on the discs at both ends of the rotor. This method can realize the dynamic balance test without test weight, and directly detect the magnitude and angle of the unbalanced force from the vibration test data; at the same time, it also comprehensively considers the vibration in the vertical and horizontal directions and the coupling effect between them, and has not passed The method of establishing the rotor dynamics model to obtain the influence coefficient has a high accuracy of the dynamic balance test; in addition, this method can effectively reduce the number of dynamic balance tests, improve the efficiency of the dynamic balance test of the rotating machine, and reduce the risk of the dynamic balance test, especially for rotating machines. The shaft dynamic balance fault detection of the machine under the real state of the whole machine.
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Description

technical field

[0001] The invention relates to a dynamic balance test method of a multi-disc shaft system of a rotating machine, in particular to a method for detecting dynamic balance faults of a multi-disk shaft system of a rotating machine without a test weight. Background technique

[0002] In the production and processing of various rotating machinery such as steam turbines, generators, pumps, fans, compressors, and electric motors, there is a common problem of unbalanced rotating parts, that is, the center of gravity of the section where the wheel is located does not coincide with the geometric center, and centrifugal force is generated during the rotation. Can cause vibrations, which can affect the safe operation of the equipment. After the rotating machine is manufactured, a dynamic balance test must be carried out.

[0003] There are mainly four kinds of dynamic balance fault detection methods currently used: (1) Influence coefficient method. Through the trial we...

Claims

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