Ultrasonic detection method of babbit metal bearing

A babbitt alloy and ultrasonic detection technology, which is applied to the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, etc., can solve problems such as low detection efficiency, environmental impact, and long time required to improve detection efficiency and avoid pollution.

Active Publication Date: 2010-06-23
SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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AI Technical Summary

Problems solved by technology

This detection method can only detect the defects on the surface of the workpiece, and cannot detect the condition of the bonding layer; the detection process pollutes the environment, and most penetrant flaw detection agents have an impact on the environment; the entire detection process has h

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  • Ultrasonic detection method of babbit metal bearing

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Embodiment Construction

[0012] Babbitt bearings are a combination of different metals. Defects such as pores in the bonding layer and poor bonding cannot be detected by naked eyes or surface flaw detection methods. To detect defects inside the workpiece, only ultrasonic flaw detection methods can be selected. According to the principle of ultrasonic flaw detection, if the propagating ultrasonic wave encounters a defect, an echo signal will be generated and received by the probe, and displayed on the fluorescent screen of the flaw detector. According to the echo signal, information such as the location and equivalent size of the defect can be obtained.

[0013] In ultrasonic testing, the choice of probe and flaw detector is crucial. The flaw detector requires high precision, high sensitivity, low electrical noise, stable waveform signal, easy operation, and can store data such as testing waveforms to track and compare testing results, and understand the changes in the location, size and nature of defec...

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Abstract

The invention discloses an ultrasonic detection method of a babbit metal bearing. A proper flaw detector is selected, a soft-faced probe with high frequency and small diameter is combined with the selected flaw detector, the sensitivity of the flaw detector is adjusted by taking a defect-free part at the bottom of a bearing bush as a reference, the probe makes regular parallel-shift scanning on the concave cambered surface of the bearing, and a fluorescent screen of the flaw detector is monitored to display the wave form. When abnormal signal wave form appears on the fluorescent screen, defect is judged to exist in the bonding between the babbit metal and steel bearing bush at the position of the probe, and when bottom wave of the flaw detector completely disappears, and only interface wave appears, the babit metal and the steel bearing bush are judged not to be bound. By using the method, the binding layer of the babbit metal bearing can be conveniently and quickly detected, the pollution to the environment by using a traditional detection method is avoided, and the detection efficiency is improved.

Description

technical field [0001] The invention relates to a bearing detection method, in particular to an ultrasonic detection method of a babbitt bearing. Background technique [0002] Babbitt bearings are often used in various high-speed rotating equipment such as blowers, steam turbines, and water pumps. Usually, the high-speed rotating shaft of the equipment floats the shaft under the action of increased oil pressure, forming a continuous oil film between the shaft and the bearing, and runs in a state of liquid friction. Once the continuous oil film is damaged and the bearing is overheated, the babbitt alloy of the bearing will partially melt or fall off, that is, the so-called "burning tile", which will cause shutdown or serious damage to the equipment, resulting in significant economic losses. The babbitt alloy on the bearing surface is melted into a liquid at a certain temperature, and the babbitt alloy is welded on the steel bearing surface by a casting method, and then proce...

Claims

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Application Information

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IPC IPC(8): G01N29/04
Inventor 喻海萍
Owner SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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