# US 12,601,347 B2 · Water-lubricated high-pressure pump using rolling support > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,601,347 B2 - Document ID: US12601347B2 - Status: Granted - Kind: B2 - Application number: 18/271,310 - Filed: 2021-12-21 - Published: 2024-02-22 - Granted: 2026-04-14 - Earliest claimed: 2021-12-21 - Assignees: Shanghai Wave Rider Fluid Technology Co., Ltd. - Applicants: Shanghai Wave Rider Fluid Technology Co., Ltd. - Inventors: Fan Zhang - Web page: https://patentgrep.com/patent/US12601347B2 ## CPC - F04B 53/18: Lubricating - F04B 9/045: {the means being eccentrics} - F04B 53/00: Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00 - F04B 53/006: {Crankshafts} - F04B 53/14: Pistons, piston-rods or piston-rod connections - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) ## Abstract This disclosure discloses a water-lubricated high-pressure pump using rolling support, including a driving mechanism, a shell, a rolling bearing, an isolation structure, at least one plunger and a plunger chamber. The driving mechanism includes a main shaft and at least one eccentric structure, and the main shaft is rotationally connected to the shell through the rolling bearing. The eccentric structure is located in a first inner chamber of the shell, which is configured for filling water or 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 to prevent the water or aqueous solution from entering into the second inner chamber. When the eccentric structure is rotated, the eccentric structure can push the plunger to move in the plunger chamber to realize pressurization of the water or aqueous solution. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The water-lubricated high-pressure pump using rolling support according to claim 1, wherein the isolation structure is designed to be as a sealing structure, and the sealing structure is designed to be as a contact sealing structure. ### Claim 3 (depends on 1) The water-lubricated high-pressure pump using rolling support according to claim 1, wherein an outer edge curve of a cross section of the thrust structure perpendicular to an axis of the main shaft comprises a first curve and a second curve, perpendicular distances from points on the first curve to the axis of the main shaft gradually increase from one end of the first curve to an other end of the first curve, and perpendicular distances from points on the second curve to the axis of the main shaft gradually decrease from one end of the second curve, which is connected to said other end of the first curve, to an other end of the second curve, which is connected to said one end of the first curve. ### Claim 4 (depends on 3) The water-lubricated high-pressure pump using rolling support according to claim 3, wherein a first anti-friction layer is provided on an outer surface of each eccentric structure and/or an inner surface of the thrust structure; and the first anti-friction layer is made of plastic. ### Claim 5 (depends on 2) The water-lubricated high-pressure pump using rolling support according to claim 2, wherein the at least one plunger each comprises a plunger body, one end of the plunger body extends into the plunger chamber, the plunger body and the plunger chamber constitute a second friction pair, a second anti-friction layer is fixed on an outer surface of the plunger body and/or an inner surface of the plunger chamber; and the second anti-friction layer is made of plastic. ### Claim 6 (depends on 1) The water-lubricated high-pressure pump using rolling support according to claim 1, wherein the thrust structure can roll on the contact surface of the plunger with the thrust structure, and can push the plunger to move in the plunger chamber to realize the pressurization of the water or aqueous solution in the plunger chamber to be discharged.