Friction and wear testing machine for friction pair of high-bearing plunger pump

The invention discloses a high-bearing plunger pump friction pair friction wear testing machine which is characterized in that a lower sample is mounted on a lower sample clamp, and the lower end of the lower sample clamp is provided with a lifting mechanism for driving the lower sample to vertically move to enable the lower sample to be in contact with or separated from an upper sample; the upper end of the upper sample is connected with a rotation driving device for driving the upper sample to rotate through an upper sample clamp. The loading of the testing machine is matched with the lead screw through optimized mechanical structure design, the loading precision is high through the loading mode, the accuracy of an experiment result is improved, stepless loading can be achieved, and the testing machine is suitable for research on friction and wear characteristics of a friction pair under various pressures; the testing machine is provided with the oil liquid collecting mechanism, oil liquid at any moment in