| (11) | EP 3 922 877 A1 |
(12) | EUROPEAN PATENT APPLICATION |
published in accordance with Art. 153(4) EPC |
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(54) | SLIDING COMPONENT AND METHOD FOR MANUFACTURING SLIDING COMPONENT |
(57) Provided are a sliding component capable of sustaining inter-sliding surface lubricity for a long time and a method for manufacturing a sliding component. At least one of a pair of sliding members 10 and 20 is provided with: a group of recessed portions 22A including a plurality of recessed portions 22 and 22' formed in a sliding surface 21 of the sliding member 20; and a plurality of hollow portions 24a to 24d and 24a' to 24d' formed inside the sliding member 20 so as to be out of alignment with the recessed portions 22 and 22' in a thickness direction of the sliding member 20. The sliding member 20 is further provided with the hollow portions 24a to 24d and 24a' to 24d' disposed so as to generate at least part of a new group of recessed portions until the sliding member 20 is worn by the thickness of deepest one of the recessed portions 22 and 22'. |
{TECHNICAL FIELD}
{BACKGROUND ART}
{CITATION LIST}
{Patent Literature}
{SUMMARY OF INVENTION}
{Technical Problem}
{Solution to Problem}
{BRIEF DESCRIPTION OF DRAWINGS}
FIG. 1 is a cross-sectional view illustrating an example of a mechanical seal as a sliding component according to a first embodiment of the present invention.
FIG. 2 is a plan view illustrating a sliding surface of a mating ring according to the first embodiment of the present invention.
FIG. 3 is a cross-sectional view taken along line A-A.
FIG. 4A is a schematic cross-sectional view illustrating a dimple and a hollow portion disposed in a thickness direction according to the first embodiment of the present invention, and FIG. 4B is a schematic view in which FIG. 4A is viewed from the sliding surface side.
FIGS. 5A to 5C are schematic views illustrating a change in the degree of wear of the sliding surface.
FIG. 6 is a schematic view illustrating a change in the volume of a dimple group with respect to sliding time.
FIGS. 7A to 7C are schematic views illustrating a mating ring manufacturing process.
FIGS. 8A and 8B are schematic views illustrating modification examples of the shapes of the dimple and the hollow portion according to the first embodiment of the present invention.
FIG. 9 is a modification example of the disposition of the dimple and the hollow portion according to the first embodiment of the present invention.
FIG. 10A is a plan view illustrating a sliding surface of a mating ring according to a second embodiment of the present invention, and FIG. 10B is a schematic cross-sectional view of FIG. 10A.
FIGS. 11A and 11B are views illustrating a first modification example of a sliding component according to the second embodiment of the present invention.
FIGS. 12A and 12B are views illustrating a second modification example of the sliding component according to the second embodiment of the present invention.
FIG. 13 is a plan view illustrating a sliding surface of a mating ring according to a third embodiment of the present invention.
FIG. 14A is a cross-sectional view taken along line B-B, and FIG. 14B is a cross-sectional view taken along line C-C.
FIG. 15 is a view illustrating a modification example of a sliding component according to the third embodiment of the present invention.
{DESCRIPTION OF EMBODIMENTS}
{First embodiment}
{Second embodiment}
{Third embodiment}
{REFERENCE SIGNS LIST}
a group of recessed portions including a plurality of recessed portions formed in a sliding surface of the one of the sliding members; and
a plurality of hollow portions formed inside the one of sliding members so as to be out of alignment with the recessed portions in a thickness direction of the one of the sliding members, and
the hollow portions are disposed so as to generate at least part of a new group of recessed portions until the one of the sliding members is worn by a thickness of deepest one of the recessed portions.
recessed portions formed in a sliding surface of the one of the sliding members, each of the recessed portions having a flat surface; and
hollow portions formed inside the one of the sliding members so as to be disposed at a position deeper than the recessed portions, the hollow portions having flat surfaces and communicating with the recessed portions.
laminating layers made of base material and each having holes; and
coupling the layers together.
REFERENCES CITED IN THE DESCRIPTION
Patent documents cited in the description