The fretting fatigue testing device and method of steel wire under a kind of radial impact operating condition

The invention discloses a kind of fretting fatigue testing device and methods of steel wire under radial impact operating condition, including testing stand, axial steel wire, it is respectively equipped with steel wire tensioning stretching device at the both ends of the axial steel wire, is equipped at the medium position of axial steel wire and radially contacts with device, percussion mechanism and spring reverse motion；It is radially contacted with by axial steel wire and contact steel wire, simulation impact operating condition, carries out radial impact to steel wire contact site, resets to the fretting contact device after being impacted, the repeated stock for realizing same contact position realizes the measurement to impact displacement by displacement sensor.Steel wire on the wire clamp of two sides is in symmetrical parallel assembly, to meet contact operating condition；Contact between steel wire is guaranteed by spring reverse motion tension force of spring.The spring tension of two side contacts of axial steel wire can be controlled by distance between adjustment spring and rail slider；The seat for changing percussion mechanism, can get under different seat impact conditions, the fretting fatigue research of steel wire.