US 11,680,858 B2
Device and method for ultrasonic detecting of rotating member based on magnetic fluid coupling
Chunguang Xu, Beijing (CN); Shuangyi Li, Beijing (CN); Yuren Lu, Beijing (CN); Peng Yin, Beijing (CN); Dezhi Li, Beijing (CN); and Wenyuan Song, Beijing (CN)
Assigned to BEJING INSTITUTE OF TECHNOLOGY
Filed by BEIJING INSTITUTE OF TECHNOLOGY, Beijing (CN)
Filed on Jul. 15, 2021, as Appl. No. 17/377,200.
Claims priority of application No. 202010718718.X (CN), filed on Jul. 23, 2020.
Prior Publication US 2022/0026293 A1, Jan. 27, 2022
Int. Cl. G01L 1/25 (2006.01); G01N 29/07 (2006.01); G01N 29/27 (2006.01); G01N 29/04 (2006.01); G01N 29/28 (2006.01)
CPC G01L 1/255 (2013.01) [G01N 29/043 (2013.01); G01N 29/07 (2013.01); G01N 29/27 (2013.01); G01N 29/28 (2013.01); G01N 2291/101 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A device for ultrasonic detecting a rotating member based on magnetic fluid coupling, comprising: an ultrasonic probe, magnetic field protection rings, a magnetic fluid and a magnetic fluid protection cover;
the ultrasonic probe is arranged above the rotating member under detection which is horizontally placed;
the magnetic fluid protective cover is sleeved on a circumferential outer side of the rotating member under detection where a detected position is located, and front ends of a transmitting ultrasonic transducer and a receiving ultrasonic transducer of the ultrasonic probe are arranged to penetrate through the magnetic fluid protective cover, a cavity formed between the magnetic fluid protective cover and the rotating member under detection is filled with the magnetic fluid, and the magnetic fluid is a liquid mixture solution, which at least includes oily or aqueous liquid and suspended ferromagnetic particles; and
the front ends of the transmitting ultrasonic transducer and the receiving ultrasonic transducer of the ultrasonic probe are provided with the magnetic field protection rings for generating magnetic fields in the magnetic field protection rings, and the generated magnetic fields attract and attach the magnetic fluid to the front ends of the transmitting and receiving ultrasonic transducers of the ultrasonic probe so as to achieve close contact of the magnetic fluid with the front ends of the transmitting and receiving ultrasonic transducers of the ultrasonic probe.