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

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of plunger pumps, in particular to an equal-diameter cam set for a non-pulse constant-flow three-piston pump. Background technique [0002] When the plunger type constant flow pump transports a large flow of liquid, there are still problems such as large pulse, high noise, and incapable of instantaneous constant flow, which cannot meet the requirements of high pressure, high precision, large flow, and constant liquid delivery in practical applications. The design of the cam set in the plunger pump is a key technical part, and the design of the cam profile is the key to output accuracy and flow. The flow pump with cam structure for transmission equipment is widely used in liquid chromatography transmission feeding, micro-reaction transmission feeding, chemical high-precision proportioning transmission feeding and other environments. [0003] The current plunger type constant flow pump cannot effectively ensu...

AI Technical Summary

Problems solved by technology

[0003] The current plunger type constant flow pump cannot effectively ensure that the cam follower always fits the cam 100% forward and back, and maintains long-term high-speed operation; moreover, the main reason for the high noise is the plunger used in the traditional plunger pump The return mechanism is a spring return mechanism, relying on the spring to keep the plunger in contact, and the life of the spring will also affect the accuracy of the pump output

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