Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16J—PISTONS; CYLINDERS; SEALINGS
  • F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
  • F16J9/12—Details
  • F16J9/14—Joint-closures
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16J—PISTONS; CYLINDERS; SEALINGS
  • F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
  • F16J9/12—Details
  • F16J9/20—Rings with special cross-section; Oil-scraping rings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
  • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
  • B23P15/06—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass piston rings from one piece
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16J—PISTONS; CYLINDERS; SEALINGS
  • F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
  • F16J9/26—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction characterised by the use of particular materials

Definitions

• the present invention relates to a compression ring, in particular for a large diesel engine piston drive.
• the invention relates to a compression ring, comprising a ring running surface on a first abutting end region, a ring running surface on a second abutting end region, an inner ring surface, an upper ring flank surface and a lower ring flank surface, the ring having overlapping abutting end regions, the first abutting end region having at least one projection in the circumferential direction and the second abutting end region has at least one recess in the circumferential direction, the at least one projection forming at least one axial and/or radial overlapping surface and the at least one recess forming at least one surface that is at least partially opposite and parallel to the axial and/or radial overlapping surface , in order to move parallel to one another when there is a change in the joint play, at least one of the surfaces which can be displaced parallel to one another having an axial wear element and/or a radial en wear element is provided.
• the idea is to introduce a wear element in the axial and/or radial gap of the compression ring in the area of the butt, with the axial and/or radial overlapping surface of the projection being at least partially opposite to the axial and/or radial overlapping surface, so that when there is a change in the Move joint game parallel to each other.
• At least one wear element for sealing the axial and/or radial annular gap is applied to at least one of these surfaces that can be displaced parallel to one another, with the surfaces that can be displaced parallel to one another being set up to move when there is a change in the joint play to move essentially parallel to each other, whereby the wear is minimized.
• the nominal diameter ring has the butt end portions overlapping each other.
• the nominal diameters of the surfaces that can be displaced parallel to one another are at least partially opposite one another.
• the nominal diameter or the nominal dimension is the theoretical dimension provided for the installation of the ring.
• the wear element has a minimum thickness of 0.005 mm.
• the wear element has different wear layers which are arranged one on top of the other and contain different materials.
• the material of the wear member has a lower wear resistance than the base material of the ring.
• the wear element is made of a temperature-resistant material with a low wear resistance, such as copper, tin, bronze, or alloys, etc.
• the softening point of this material must withstand the highest achievable temperatures in engine operation.
• the wearing element covers 10-100% of the area on which the wearing element is arranged.
• the wearing element is arranged at a distance in the axial direction and/or radial direction from an edge of the surface on which the wearing element is arranged. It is preferable that the abutting end portions are formed in one step.
• abutting end portions are formed in two stages.
• abutting end portions are stepped.
• At least one surface that lies in a plane that is spanned by a ring axial and ring radial direction and is arranged in the second abutting end region has a first structure that is divided into at least one surface that lies in a plane spanned by a ring axial and ring radial direction and located in the first abutting end portion.
• Structures can be rectified, intersecting and/or disordered, such as straight, arc-shaped or flat, and/or have a roughness Ra of 0.2-12.5 ⁇ m, preferably 0.4-10 ⁇ m, particularly preferably 0 .8-6.3 ⁇ m.
• a strength of the wear member is 1-80%, preferably 1-40%, more preferably 1-20% lower than a strength of the compression ring.
• the invention relates to a method for grinding in a compression ring, the method comprising the steps of applying a wearing element by rolling wire into a groove, laser remelting, laser cladding, cladding, thermal spraying and/or galvanic or chemical deposition or sintering and Moving the butt end portions against each other to create wear of the wear member until the nominal axial and/or radial dimension of the compression ring is reached.
• the impact of the ring makes a cyclic, opening and closing movement in the circumferential direction due to the change in diameter over temperature and the temperature-dependent change in diameter over the stroke and will thus grind off the material protruding into the gap dimension.
• the wear of the wear element should be targeted, ie it should be ground in until the nominal size of the ring is reached in the axial and radial direction.
• the material to be added should be added at the end of the actual manufacturing process and then go at least 0.05 mm beyond the measured axial gap size without the wearing material.
• Fig. 1 Impact end areas with axial impact sealing of the compression ring according to the invention
• Fig. 2 shows butt end areas with axial and radial butt sealing of the compression ring according to the invention.
• Fig. 1 shows butt end areas with axial butt sealing of the compression ring according to the invention.
• the compression ring comprises a ring running surface 2 on a first abutting end area, a ring running surface 2' on a second abutting end area, a ring inner surface 4, an upper ring flank surface 6 and a lower ring flank surface 8.
• a first abutting end area has a cuboid projection 10 in the circumferential direction and a second abutting end area one too matching cuboid recess 12 also in the circumferential direction.
• the projection 10 and the recess 12 form one Overlapping area consisting of two opposite, identically aligned surfaces in the axial and radial directions.
• the opposing surfaces are at least partially opposite.
• a wear element 14 is arranged on the surface perpendicular to the axial direction in recess 12, which does not completely cover the surface on which it is applied and is arranged centrally in the radial direction and offset in the circumferential direction in the direction of the annular gap. In addition, the wear element 14 is spaced from the edges of the surface to which it is applied.
• both impact end regions are designed in two stages, with a radial dimension of the projection 10 corresponding to approximately 2/3 of the nominal radial dimension of the compression ring and an axial dimension of the projection 10 corresponding to approximately 3/4 of the nominal axial dimension of the compression ring.
• the first butt end portion has a first butt end which corresponds to the highest point of the projection 10 and is located in a plane spanned by a ring axial and ring radial direction.
• the second impact end area has a surface which is also located in a plane spanned by a ring axial and ring radial direction, but which corresponds to the deepest point of the recess 12 . Both the first abutting end and the surface face each other.
• the following surfaces can come into surface contact in Fig. 1: the surface on projection 10 perpendicular to the axial direction with the surface on recess 12 perpendicular to the axial direction, and the surface on projection 10 perpendicular to the radial direction with the surface on recess perpendicular to the radial direction 12 and the surface perpendicular to the circumferential direction on the projection 10, which corresponds to the highest point of the projection 10, with the surface perpendicular to the circumferential direction on the recess 12, which corresponds to the lowest point of the recess 12.
• the highest point of the recess 12 forms a second abutting end and cannot come into face-to-face contact with the opposite surface in the first abutting end portion because it has a curvature.
• the compression ring comprises a ring running surface 2 on a first abutting end area, a ring running surface 2' on a second abutting end area, a ring inner surface 4, an upper ring flank surface 6 and a lower ring flank surface 8.
• a first abutting end area has a cuboid projection 10 in the circumferential direction and a second abutting end area one too matching cuboid recess 12 also in the circumferential direction.
• the projection 10 and the recess 12 form an overlapping area consisting of two opposite, identically aligned surfaces in the axial and radial directions.
• the opposing surfaces are at least partially opposite.
• An axial wear element 14 is arranged on the surface in recess 12 which is perpendicular to the axial direction, and a radial wear element 14' is arranged on the surface in recess 12 which is perpendicular to the radial direction. Both wear elements 14, 14' do not completely cover the surface on which they are applied and are on the respective
• wear elements 14, 14' are arranged at a distance from the edges of the surface on which it is applied.
• both impact end regions are designed in two stages, with a radial dimension of the projection 10 corresponding to approximately 2/3 of the nominal radial dimension of the compression ring and an axial dimension of the projection 10 corresponding to approximately 3/4 of the nominal axial dimension of the compression ring.
• the first butt end portion has a first butt end which corresponds to the highest point of the projection 10 and is located in a plane spanned by a ring axial and ring radial direction.
• the second impact end area has a surface which is also located in a plane spanned by a ring axial and ring radial direction, but which corresponds to the deepest point of the recess 12 . Both the first abutting end and the surface face each other.
• the following surfaces can come into surface contact in FIG. 2: the surface perpendicular to the axial direction on projection 10 with the perpendicular to the axial direction surface on recess 12, the surface perpendicular to the radial direction on projection 10 with the surface perpendicular to the radial direction on recess 12, and the surface perpendicular to the circumferential direction on projection 10, which corresponds to the highest point of projection 10, with the perpendicular to the circumferential direction Area of the recess 12, which corresponds to the deepest point of the recess 12.
• the highest point of the recess 12 forms a second abutting end and cannot come into face-to-face contact with the opposite surface in the first abutting end portion because it has a curvature.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Pistons, Piston Rings, And Cylinders (AREA)
• Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
• Laser Beam Processing (AREA)
• Sealing Devices (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Citations (8)

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• 2021
  • 2021-09-17 DE DE102021124071.9A patent/DE102021124071B3/de active Active
• 2022
  • 2022-04-26 WO PCT/EP2022/061020 patent/WO2023041205A1/de not_active Ceased
  • 2022-04-26 US US18/691,930 patent/US20240376982A1/en active Pending
  • 2022-04-26 FI FIEP22725766.4T patent/FI4367418T3/fi active
  • 2022-04-26 DK DK22725766.4T patent/DK4367418T3/da active
  • 2022-04-26 EP EP22725766.4A patent/EP4367418B1/de active Active
  • 2022-04-26 KR KR1020247011571A patent/KR20240058914A/ko active Pending
  • 2022-04-26 JP JP2024516870A patent/JP2024535269A/ja active Pending
  • 2022-04-26 CN CN202280062768.4A patent/CN117980633A/zh active Pending

Patent Citations (8)

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