The present invention discloses a testing
machine and a testing method for fatigue life of ultra-low vibration deep groove ball bearings. The testing
machine is composed of a testing frame, a testing platform, an asynchronous motor located below the testing platform, a transmission mechanism, a testing shaft connected to the transmission mechanism, a testing slot, a
simulation body, a loading shell, an axial loading
hydraulic cylinder and a radial loading
hydraulic cylinder; the testing slot, the
simulation body, the loading shell and the axial loading
hydraulic cylinder are all fixed on the testing platform; the radial loading hydraulic cylinder is located under the testing platform. The testing method is to extend and retract the
simulation body as required, then fix it, and then fix the testing slot; according to the actual working condition of the deep groove
ball bearing to be tested, slide the loading shell on the testing shaft; and according to the position of the loading shell, slide the radial loading hydraulic cylinder and fix it, start the asynchronous motor, and apply cyclic loads through the radial loading hydraulic cylinder and the axial loading hydraulic cylinder. The present invention has a reasonable design, reduces the occupation of site space, and has high versatility and applicability.