Ultrasonic testing device for cracks of generator retaining ring end

An ultrasonic testing device for cracks of a generator retaining ring end comprises an A type pulse ultrasonic testing main machine, an ultrasonic probe connected with the main machine and an adjustable probe support. The ultrasonic probe is in a single transceiver serial mode formed by connecting two single crystal probes through the adjustable probe support. The casing of each single crystal probe is in a rectangular shape and a piezoelectric crystal connecting a connecting wire is arranged inside each casing. The piezoelectric crystal is adhered to a back sound irrigation absorber arranged on an acoustical transmission wedge. The wire is drawn out through a wire leading base and is connected with the signal input end and the signal output end of the A type pulse ultrasonic testing main machine respectively to form the single transceiver serial mode. Two support rods capable of adjusting distance and angles respectively and transversely penetrate through each single crystal probe. Each support rod is provid