# US 11,898,570 B2 · Pump assembly comprising a lubrication—and cooling system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,898,570 B2 - Document ID: US11898570B2 - Status: Granted - Kind: B2 - Application number: 17/628,952 - Filed: 2020-07-20 - Published: 2022-08-18 - Granted: 2024-02-13 - Earliest claimed: 2019-07-23 - Assignees: KSB SE & Co. KGaA - Applicants: KSB SE & Co. KGaA - Inventors: Thomas Pensler; Christoph Jaeger; Daniel Ziegs; Hermann Bonitz - Web page: https://patentgrep.com/patent/US11898570B2 ## CPC - F04D 29/061: {especially adapted for liquid pumps} - F04D 1/00: Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D7/00; priming or boosting F04D9/00) - F04D 29/0462: {Bearing cartridges} - F04D 29/049: Roller bearings - F04D 29/586: {specially adapted for liquid pumps} - F16C 33/6659: {Details of supply of the liquid to the bearing, e.g. passages or nozzles} - F16N 13/20: Rotary pumps (with distributing equipment F16N13/22) - F16N 2013/205: {Screw pumps} - F16N 2210/14: Bearings - F16N 2210/16: Pumps - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS - F16N: LUBRICATING ## Abstract A pump assembly for delivering a medium via a flow chamber (13) defined by a hydraulic housing and a housing cover, includes a pump shaft rotatably drivable about an axis of rotation, an impeller fixed to one end of the pump shaft inside the flow chamber, a bearing carrier. The pump assembly further includes a lubrication and cooling system with oil recirculation in the bearing carrier. ## Claims ### Claim 1 A pump arrangement for conveying a medium, comprising: a hydraulics housing; a housing cover configured to cooperate with the hydraulics housing to define a flow chamber; a pump shaft rotatable about an axis of rotation; an impeller located in the flow chamber and arranged on a first end of the pump shaft; a bearing carrier; a lubrication and cooling system in the bearing carrier configured to provide oil circulation; and a filler body surrounding at least a second portion of the pump shaft is provided in the interior of the bearing carrier, wherein a first annular space is formed between the filler body and the pump shaft, and a second annular space is formed between the filler body and an outer wall of the bearing carrier. ### Claim 2 (depends on 1) The pump arrangement as claimed in claim 1, wherein an interior of the bearing carrier includes a first bearing receptacle configured to receive a first bearing and a second bearing receptacle, configured to receive a second bearing, and the first bearing and the second bearing are arranged to support rotation of the pump shaft about the axis of rotation. ### Claim 3 (depends on 2) The pump arrangement as claimed in claim 2, further comprising: a bearing cover; and a conveying element located within the bearing cover between the first bearing and the second bearing, wherein conveying element is one of formed on the pump shaft or is arranged on the pump shaft as a separate element is provided within the bearing carrier. ### Claim 4 (depends on 3) The pump arrangement as claimed in claim 3, wherein at least one chamber surrounding at least a first portion of the pump shaft is located in the bearing carrier adjacent to the first bearing receptacle. ### Claim 5 (depends on 4) The pump arrangement as claimed in claim 4, wherein the at least one chamber is subdivided into individual segments by separating walls. ### Claim 6 (depends on 5) The pump arrangement as claimed in claim 5, wherein the filler body has an inner wall facing toward the pump shaft and an outer wall facing away from the pump shaft, and a cavity in the filler body is located between the inner wall and the outer wall of the filler body. ### Claim 7 (depends on 6) The pump arrangement as claimed in claim 6, wherein the filler body extends in a radial direction relative to the rotation axis as far as an inner lateral surface of the outer wall of the bearing carrier, and at least one groove is provided at an outer side of the outer wall of the filler body. ### Claim 8 (depends on 6) The pump arrangement as claimed in claim 6, wherein an annular projection extends into a region within the bearing cover, and at least one cutout is provided at a free face side of the annular projection facing away from the filler body. ### Claim 9 (depends on 8) The pump arrangement as claimed in claim 8, wherein a guide device is arranged at the free face side of the annular projection. ### Claim 10 (depends on 9) The pump arrangement as claimed in claim 9, further comprising: a fan cover coupled to the bearing carrier; and a fan wheel coupled to the pump shaft arranged in the fan cover. ### Claim 11 (depends on 10) The pump arrangement as claimed in claim 10, wherein the conveying element includes an annular element with a first face side and a second face side opposite the first face side. ### Claim 12 (depends on 11) The pump arrangement as claimed in claim 11, wherein at least one vane is arranged on an outer lateral surface of the annular element and extends from a region adjacent to the first face side in a diagonal direction relative to the rotation axis to a region adjacent to the second face side. ### Claim 13 (depends on 5) The pump arrangement as claimed in claim 5, wherein an annular projection extends into a region within the bearing cover, and at least one cutout is provided at a free face side of the annular projection facing away from the filler body. ### Claim 14 (depends on 13) The pump arrangement as claimed in claim 13, wherein a guide device is arranged at the free face side of the annular projection. ### Claim 15 (depends on 14) The pump arrangement as claimed in claim 14, further comprising: a fan cover coupled to the bearing carrier; and a fan wheel coupled to the pump shaft arranged in the fan cover. ### Claim 16 (depends on 15) The pump arrangement as claimed in claim 15, wherein the conveying element includes an annular element with a first face side and a second face side opposite the first face side. ### Claim 17 (depends on 16) The pump arrangement as claimed in claim 16, wherein at least one vane is arranged on an outer lateral surface of the annular element and extends from a region adjacent to the first face side in a diagonal direction relative to the rotation axis to a region adjacent to the second face side.