Water-lubricated high-pressure pump using rolling support

A water-lubricated high-pressure pump using rolling support, comprising a driving mechanism, a shell, a rolling bearing, an isolation structure, at least one plunger and at least one plunger chamber corresponding to the at least one plunger one by one, wherein the driving mechanism comprises a main shaft and at least one eccentric structure arranged on the main shaft, and the main shaft is on at least one side thereof rotationally connected to the shell through the rolling bearing;

• the at least one eccentric structure is located in a first inner chamber of the shell, and the first inner chamber of the shell is configured to receive water or an aqueous solution;
• the rolling bearing is located in a second inner chamber of the shell, and the isolation structure is configured to seal the water or aqueous solution inside the shell from entering into the second inner chamber;
• and when the at least one eccentric structure is rotated, the at least one eccentric structure can push the at least one plunger to move in the plunger chamber to realize pressurization of the water or aqueous solution;
• wherein a thrust structure is sleeved on an outer side of each eccentric structure, the thrust structure is located in the first inner chamber of the shell, the thrust structure and the eccentric structure are rotated relative to each other, and the thrust structure and the eccentric structure constitute a first sliding friction pair;
• the water or the aqueous solution enters into the first sliding friction pair in the first inner chamber;
• and when the at least one eccentric structure is rotated, the thrust structure abuts against a contact surface of the plunger and rolls on the contact surface, to push the at least one plunger to move in the plunger chamber to realize the pressurization of the water or the aqueous solution;
• wherein a drainage chamber is arranged between the isolation structure and the rolling bearing, the drainage chamber communicates with a fluid channel of the shell, and the water or the aqueous solution inside the drainage chamber is discharged to an outside of the shell through the fluid channel;
• wherein the rolling bearing is lubricated with grease.