Wheel set magnetic particle flaw detector

The utility model discloses a wheel set magnetic particle flaw detector which comprises a circumferential electrifying and magnetizing device, a longitudinal opening and closing coil magnetizing device, a wheel set lifting and rotating device, a cross beam lifting device, an opening and closing type double magnetizing coil, an electrode jacking device and a wheel set walking control device, the circumferential electrifying magnetizing device and the longitudinal opening and closing coil magnetizing device are adopted to generate a composite magnetic field, so that all-directional flaw detection of a wheel set is realized, the flaw detection requirement of the wheel set is met, and the flaw detection sensitivity of a wheel set axle body and the outer side surface of a wheel is ensured, so that the aim of completing multi-part flaw detection of the wheel set by one device is fulfilled; according to the utility model, the five groups of open-close type double-magnetizing coils are connected in series to form the