Gear pulse load type fatigue life test method and test device

The invention provides a gear pulse load type fatigue life test method and a test device. The test method comprises the following steps: (1) determining the pulse load Mz, torsion angle theta, frequency f and cycle index N of a gear according to the fatigue life test requirement of a transmission assembly; (2) marking the gear teeth of the gear before test; (3) installing the gear in a test deviceand fixing a driven shaft; (4) debugging a program according to the test parameters; and (5) performing test verification. The invention also provides a piece of gear pulse load type fatigue life test equipment, which comprises a gear pair supporting mechanism capable of installing a driving gear and a driven gear, a pulse torque test bench capable of driving a driving shaft in a reciprocating torsion manner, and a lubricating oil supply system connected with the gear pair supporting mechanism. Test verification of differently numbered gear teeth of the same gear is realized by rotating the driven shaft to positions