High-pressure water pump lubricated by water or aqueous solution

A high-pressure water pump lubricated by water or aqueous solution, comprising a driving mechanism without a hydrostatic support, a shell, a rebound structure, at least one plunger and a plunger cavity, wherein the driving mechanism comprises a main shaft and at least one eccentric structure arranged on the main shaft, a thrust structure is sleeved on an outer side of each eccentric structure, the thrust structure and the eccentric structure rotate relative to each other, and the thrust structure and the eccentric structure constitute a first sliding friction pair to reduce friction through a hydrodynamic pressure lubrication effect generated by the mutual rotation of the eccentric structure and the thrust structure with water or aqueous solution as lubricant;

• the eccentric structure and the thrust structure are both located in the shell, spaces in the shell in which the eccentric structure and the thrust structure are respectively located are used to be filled with water or an aqueous solution simultaneously, and the water or aqueous solution enters the first sliding friction pair in the shell;
• when the eccentric structure is rotated, the thrust structure rolls on a contact surface between the thrust structure and the plunger by adopting a rolling contact between the thrust structure and the plunger in water environment condition and pushes the plunger to move in the plunger cavity to pressurize the water or aqueous solution;
• and the plunger moves in the plunger cavity under the rebound force of the rebound structure to suck in water or aqueous solution;
• wherein a first anti-friction layer is provided on the outer surface of the eccentric structure and/or the inner surface of the thrust structure, and the first anti-friction layer is made of plastic.