High-pressure water pump lubricated by water or aqueous solution

Abstract

A high-pressure water pump lubricated by water or aqueous solution is provided, relating to the technical field of high-pressure plunger pumps. The high-pressure water pump includes a driving mechanism, at least one plunger, a plunger cavity, and a shell. The driving mechanism includes an eccentric wheel shaft and thrust rings. The eccentric wheel shaft includes a main shaft and multiple eccentric wheels arranged on the main shaft. The eccentric wheels are integral eccentric wheels and combined eccentric wheels, respectively. Compared with an original combined eccentric wheel structure mode, the eccentric wheel shaft provided by the present disclosure obviously improve anti-deflection characteristics of the main shaft, and thereby prolongs the service life of the high-pressure water pump. Moreover, the thrust ring structure can be conveniently installed, the structure is simple and compact, and the weight is light.

What is claimed is: 
     
         1 . A high-pressure water pump lubricated by water or aqueous solution, comprising a driving mechanism, at least one plunger, a plunger cavity, and a shell; wherein the driving mechanism comprises an eccentric wheel shaft and thrust rings, the eccentric wheel shaft comprises a main shaft and a plurality of eccentric wheels arranged on the main shaft; each thrust ring is sleeved outside one of the eccentric wheels, each thrust ring and one of eccentric wheels is able to rotate with respect to each other; both ends of the main shaft are bearing supporting sections, the plurality of eccentric wheels and thrust rings are located in the shell, and a space in the shell where the plurality of eccentric wheels and thrust rings are located is also used to be filled with water or aqueous solution; when the plurality of eccentric wheels rotate, the plunger is pushed by the thrust rings to move in the plunger cavity, so as to pressurize the water or aqueous solution;
 the plurality of eccentric wheels are integral eccentric wheels or combined eccentric wheels, and material continuity is formed between the integral eccentric wheels and the main shaft; each of the combined eccentric wheels comprises a reinforcing mandrel and an eccentric wheel sleeve, a profile curve of the reinforcing mandrel on a projection plane perpendicular to a central line of the main shaft is non-circular, and the eccentric wheel sleeve is sleeved outside the reinforcing mandrel; the reinforcing mandrel is able to drive the eccentric wheel sleeve to rotate synchronously, and material continuity is formed between the reinforcing mandrel and the main shaft;   when a number of eccentric wheels in the plurality of eccentric wheels is three, at least one eccentric wheel is located at a central position is the integral eccentric wheel, and at least one eccentric wheel at an outermost side is the combined eccentric wheel; and   when the number of eccentric wheels in the plurality of eccentric wheels is four, at least two eccentric wheels are located at a central position are the integral eccentric wheels, and at least one eccentric wheel at the outermost side is the combined eccentric wheel.   
     
     
         2 . The high-pressure water pump lubricated by water or aqueous solution according to  claim 1 , wherein the profile curve of the reinforcing mandrel on the projection plane perpendicular to the central line of the main shaft surrounds a periphery of a profile curve of the bearing supporting sections on the projection plane perpendicular to the central line of the main shaft. 
     
     
         3 . The high-pressure water pump lubricated by water or aqueous solution according to  claim 1 , wherein the profile curve of the reinforcing mandrel on the projection plane perpendicular to the central line of the main shaft is surrounded by a profile curve of an adjacent integral eccentric wheel on the projection plane perpendicular to the central line of the main shaft. 
     
     
         4 . The high-pressure water pump lubricated by water or aqueous solution according to  claim 1 , wherein when the eccentric wheel shaft rotates, the thrust rings are able to roll on a surface in contact with the plunger and push the plunger to move in the plunger cavity, so as to pressurize the water or aqueous solution.