Equal-diameter cam set for pulse-free constant-flow three-plunger pump

The invention relates to the technical field of plunger pumps, in particular to an equal-diameter cam set for a pulse-free constant-flow three-plunger pump comprising three cams which are coaxially arranged. The angle difference between any two cams is 120 degrees; the lift and return angles of the cams are equal; each cam is provided with a cam follower in a matching manner; the cam follower drives the corresponding plunger to do reciprocating motion; each cam follower comprises rolling wheels and a connecting rod; the two rolling wheels oppositely arranged on the sides of the equal-diametercams are both in contact connection with the equal-diameter cams; the connecting line of the wheel centers of the two rolling wheels passes through the hole center of a mounting hole; and the wheel center distance of the two rolling wheels is kept constant in the process of making contact with the equal-diameter cams. The equal-diameter cam set for the pulse-free constant-flow three-plunger pump has the beneficial effects that the resultant velocity of the movement of the plungers driven by the cam followers corresponding to the three cams is a constant value, so that the output flow of the pump is a constant value, the cam followers are in contact with the cams all the time in the high-speed movement process, and the transmission precision of the equal-diameter cam set for the pulse-freeconstant-flow three-plunger pump is improved.