# US 9,752,574 B2 · Rinsing arrangement for tribological contact areas and rotary vane pump with such an arrangement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,574 B2 - Document ID: US9752574B2 - Status: Granted - Kind: B2 - Application number: 13/325,468 - Filed: 2011-12-14 - Published: 2012-06-28 - Granted: 2017-09-05 - Earliest claimed: 2010-12-14 - Assignees: Robert Bosch GmbH - Applicants: Rene Scheerer; Patrick Steiner - Inventors: Rene Scheerer; Patrick Steiner - Web page: https://patentgrep.com/patent/US9752574B2 ## CPC - F04C 2/344: with vanes reciprocating with respect to the inner member - F04C 14/223: {using a movable cam} - F04C 2270/16: Wear - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS ## Abstract A cooling and lubricating arrangement of tribological contact areas is disclosed. The arrangement includes tribological contact areas that slide over one another, of which at least one contact area has a surface contour with surface depressions in which a lubricant is stored. The surface contour forms a number of elongate grooves, the gap heights of which, at least in respect of respectively two adjacent grooves, are preferably different. ## Claims ### Claim 1 A rinsing arrangement, comprising: sliding partners, each of said sliding partners including a tribological contact area, the contact area of each sliding partner configured and arranged to slide against one another in a direction of linear relative movement between the sliding partners, wherein a plurality of grooves are formed in at least one of the tribological contact areas between opposite ends thereof, each of said plurality of grooves extending from one of said opposite ends to the other of said opposite ends in the direction of linear relative movement, and liquid lubricant situated in said plurality of grooves, wherein each of said plurality of grooves has a flow cross section to flow the liquid lubricant between said opposite ends, said flow cross section defined by the height and width of each groove, wherein the flow cross section differs between at least two adjacent grooves of said plurality of grooves. ### Claim 2 (depends on 1) The rinsing arrangement as claimed in claim 1, wherein at least a portion of at least two adjacent grooves of said plurality of grooves are aligned parallel to one another. ### Claim 3 (depends on 1) The rinsing arrangement as claimed in claim 1, wherein the plurality of grooves includes grooves having a zigzag-shaped profile. ### Claim 4 (depends on 1) The rinsing arrangement as claimed in claim 1 wherein said plurality of grooves at least have longitudinal sections that are at an angle to the direction of relative movement between the tribological contact areas. ### Claim 5 (depends on 1) The rinsing arrangement as claimed in claim 1, wherein the plurality of grooves includes elongated grooves interconnected between at least two different rinsing agent pressure potentials at opposite ends of the elongated grooves in the direction of relative movement between the tribological contact areas, as a result of which a pressure drop is created along the tribological contact areas. ### Claim 6 (depends on 1) The rinsing arrangement as claimed in claim 1, wherein the plurality of grooves are selected from grooves having a rectangular, wedge-shaped or partial-circle-shaped cross section. ### Claim 7 (depends on 1) The rinsing arrangement as claimed in claim 1, wherein the plurality of grooves includes a plurality of adjacent grooves having alternating gap heights. ### Claim 8 A rinsing arrangement, comprising: sliding partners, each of said sliding partners including a tribological contact area, the contact area of each sliding partner configured and arranged to slide against one another in a direction of relative movement between the sliding partners, wherein at least one groove is formed in at least one of the tribological contact areas between opposite ends thereof in the direction of relative movement, wherein the at least one groove has a labyrinthine profile, and liquid lubricant situated in said at least one groove, wherein said at least one groove has a flow cross section to flow the liquid lubricant between said opposite ends, said flow cross section defined by the height and width of the groove, wherein the flow cross section differs between at least two adjacent sections of said groove. ### Claim 9 A rotary vane pump having a rotor and a lifting ring that is adjustable in a pump housing in a plane perpendicular to the rotational axis of the rotor, the lifting ring and pump housing forming sliding partners, the eccentricity of which can be set by displacing the lifting ring along tribological contact areas that are in sliding contact in the direction of the perpendicular plane between the pump housing and the lifting ring, the rotary vane pump comprising: a rinsing arrangement for the sliding partners including a plurality of grooves formed in at least one of the tribological contact areas that slide against one another, each of said plurality of grooves extending between opposite ends of said at least one tribological contact area in the direction of the perpendicular plane, with fluid lubricant being situated in said plurality of grooves, wherein each of said plurality of grooves has a flow cross section to flow the liquid lubricant between said opposite ends, said flow cross section defined by the height and width of the groove, wherein the flow cross section differs between at least two adjacent grooves of said plurality of grooves. ### Claim 10 (depends on 9) The rotary vane pump as claimed in claim 9, wherein one of said tribological contact areas is formed on the outside of the lifting ring outside of a region where high pressure acts on the inside of the lifting ring and the other of the tribological contact areas is formed on the pump housing, at least one of the tribological contact areas equipped with said rinsing arrangement. ### Claim 11 (depends on 10) The rotary vane pump as claimed in claim 10, wherein the lifting ring and the housing each have two tribological contact areas, the corresponding tribological contact areas of the lifting ring and the pump housing in sliding contact with each other and at least one tribological contact area of the corresponding tribological contact areas equipped with said rinsing arrangement.