Ultrasonic detection method of babbit metal bearing

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...

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 high requirements for the ambient temperature, which needs to be controlled within 10°C to 50°C; the surface cleanliness of the inspected workpiece is highly required, and there must be no rust, oil, etc.; it takes a long time to clean and observe and detect, and the detection efficiency is low

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