WO2012117987A1 - ピストンリング - Google Patents
ピストンリング Download PDFInfo
- Publication number
- WO2012117987A1 WO2012117987A1 PCT/JP2012/054697 JP2012054697W WO2012117987A1 WO 2012117987 A1 WO2012117987 A1 WO 2012117987A1 JP 2012054697 W JP2012054697 W JP 2012054697W WO 2012117987 A1 WO2012117987 A1 WO 2012117987A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piston ring
- piston
- gas
- concave portion
- convex portion
- Prior art date
Links
Images
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
- F16J9/16—Joint-closures obtained by stacking of rings
-
- 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
Definitions
- the present invention relates to a piston ring, for example, a piston ring used in a reciprocating internal combustion engine such as a large marine two-cycle diesel engine.
- a piston ring which is attached to a piston (more specifically, a piston crown) of a reciprocating internal combustion engine and maintains the pressure in the combustion chamber, when attached to the piston, once pushes the inner diameter of the piston ring so that it exceeds the outer diameter of the piston.
- a slit called a joint is provided in one place in order to achieve close contact with the inner wall surface (inner circumferential surface) of the cylinder liner by expanding in the radial direction. It has been.
- a piston ring R2 see FIG. 29
- a piston ring R3 having a right angle joint or a piston ring R3 (see FIG.
- a piston ring R1 (see FIG. 28) having a stepped joint (gas tight joint) disclosed in Patent Document 1 is generally adopted as a so-called pressure ring such as a top ring.
- piston ring R1 (refer FIG. 28) provided with the stepped joint (gas tight joint) disclosed by patent document 1 is used as a top ring
- the airtightness in the joint of the piston ring provided with the stepped joint is very
- the load received by the piston ring having the stepped joint that is, the combustion gas pressure
- the wear of the top ring becomes (remarkably) larger (faster) than other piston rings, and the wear on the inner wall surface of the cylinder liner facing the top ring also becomes larger (faster). there were.
- a piston top ring disclosed in Patent Document 2 is known as a piston ring for solving such problems.
- the combustion gas is passed through a plurality of grooves 15 having a U-shape in plan view or a V-shape in plan view provided on the outer peripheral surface (sliding surface). Has been blown by. Therefore, a crack is generated in the groove 15 and the piston top ring 4 is broken or the depth of the groove 15 is reduced as the piston top ring 4 is worn. May disappear. Further, in the piston top ring 4 disclosed in Patent Document 2, the inner wall surface of the cylinder liner is scratched at the corner of the groove 15 provided on the outer peripheral surface (sliding surface), or the outer peripheral surface is damaged. When the wear-resistant coating is applied, the wear-resistant coating may be peeled off from the corner of the groove 15.
- the present invention has been made in view of such circumstances, and an object of the present invention is to provide a piston ring capable of reducing its own wear by reducing its own load.
- the present invention employs the following means in order to solve the above problems.
- the piston ring according to the first aspect of the present invention is a piston ring having a convex portion at one end and a concave portion at the other end, and a stepped joint formed by the convex portion and the concave portion, Between the convex part and the concave part, a gas passage for guiding gas acting on one side surface to the other side surface is provided.
- the gas which acts on one side is led to the other side through a gas passage.
- the load which self receives can be reduced and self wear can be reduced.
- the gas passage has a notch and / or a circumferential groove and / or the convex portion and the concave portion formed along the circumferential direction in the convex portion and / or the concave portion.
- the structure made into the clearance gap formed between these may be sufficient.
- the piston ring which concerns on the said structure WHEREIN is a flat inclined surface or curved surface which connects the inner peripheral end of the intermediate horizontal surface which forms the said convex part, and the upper end of the intermediate
- the workability in machining the notch is the best, so that productivity and workability can be improved, and the manufacturing cost can be reduced. Can be reduced. Further, since the circumferential groove is provided at a place where the piston ring and the cylinder liner do not slide, the inner wall surface of the cylinder liner is not scratched by the corner of the groove.
- the piston ring which concerns on the said structure WHEREIN exhibits the rectangular shape of a cross sectional view carved on the said one side side along the circumferential direction in the center part in the thickness direction of the intermediate horizontal surface which forms the said recessed part.
- a first circumferential groove, and a second circumferential groove having a rectangular shape in cross section, engraved on the side of the other side surface along the circumferential direction at a central portion in the thickness direction of the intermediate horizontal plane forming the convex portion May be provided.
- the workability in machining the circumferential groove is the best, so that the productivity and workability can be improved, and the manufacturing cost can be reduced. Can be reduced. Further, since the circumferential groove is provided at a place where the piston ring and the cylinder liner do not slide, the inner wall surface of the cylinder liner is not scratched by the corner of the groove.
- the gap formed between the convex portion and the concave portion is set to be about 4 to 10 times the gap in a conventional piston ring having a stepped joint. May be.
- the circumferential overlap of the convex portion and the concave portion may be set to be about 2 to 4 times the height of the piston ring.
- the piston ring set according to the second aspect of the present invention includes any one of the above piston rings and a piston ring having a right angle joint and / or a piston ring having a diagonal joint.
- the piston ring set according to the second aspect may include only one of the above piston rings.
- the life of each piston ring comes (substantially) at the same time, and the replacement time of the piston ring comes (substantially) at the same time. And running costs can be reduced.
- any one of the above piston rings is inserted into the ring groove.
- the life of each piston ring comes (substantially) at the same time, and the replacement time of the piston ring comes (substantially) at the same time, so that maintainability can be improved, Running costs can be reduced.
- An internal combustion engine includes the piston ring set or the piston.
- the internal combustion engine it is possible to reduce wear on the inner wall surface of the cylinder liner, extend the life of the cylinder liner (prolong the life), and reduce running costs. Can do.
- the piston ring according to the present invention has an effect that the load received by the piston ring can be reduced and the wear of the piston ring can be reduced.
- FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. It is a perspective view which expands and shows the principal part of the piston ring which concerns on 2nd Embodiment of this invention, Comprising: It is a figure similar to FIG. It is a perspective view which expands and shows the principal part of the piston ring which concerns on 3rd Embodiment of this invention, Comprising: It is a figure similar to FIG.
- FIGS. 1 to 3, 26 and 27 are perspective views of a piston ring according to the present embodiment
- FIG. 2 is an enlarged view showing a portion surrounded by a two-dot chain line in FIG. 1
- FIG. 3 is a cross-sectional view taken along line AA in FIG. 26
- FIG. 27 is a partial sectional view in the vicinity of the piston ring mounting portion.
- the piston 2 is fitted with a plurality of (three in this embodiment) ring grooves 3, 4 and 5 in the height direction, and one piston ring 6, 7 and 8 is fitted in the piston 2 respectively. It is inserted.
- the piston 2 reciprocates while the outer peripheral surfaces 6 a, 7 a, 8 a of the piston rings 6, 7, 8 are in sliding contact with the inner wall surface (inner peripheral surface) 9 a of the cylinder liner 9.
- a ring side surface gap 11 that opens to the combustion chamber 10 of the diesel engine 1 is formed in the upper portion of the piston 2, and the ring side surface gap 11 is filled with combustion gas from the combustion chamber 10.
- the cylinder head indicated by reference numeral 12 covers the upper surface of the cylinder liner 9 and forms the combustion chamber 10 together with the cylinder liner 9 and the piston 2. Further, in such a diesel engine 1, an exhaust valve 13 is provided at the center of the combustion chamber 10. The output of the piston 2 is transmitted from the piston rod 14 to a crankshaft (not shown).
- the piston ring 21 is used, for example, as a piston ring (top ring) indicated by reference numeral 6 in FIGS. 26 and 27 and includes a stepped joint (gas tight joint) 22. .
- the stepped joint 22 includes a convex part (male part) 23 and a concave part (female part) 24.
- the convex portion 23 is a projecting member formed so as to extend along the circumferential direction at one end portion of the piston ring 21 and fit into the concave portion 24, and includes an outer peripheral surface (sliding surface) 31 and an intermediate inner surface.
- a peripheral surface 32, a first end surface 33, an intermediate horizontal surface 34, a second end surface 35, and a side surface (lower surface: bottom surface) 36 are provided.
- the outer peripheral surface 31 continuously forms the same surface as the outer peripheral surface 41a in a portion other than one end portion of the piston ring 21 (hereinafter referred to as “piston ring main body 41”), and slides with the outer peripheral surface 41a ( It is a horizontal plane that forms a surface that slides against the inner wall surface 9a of the cylinder liner 9.
- the intermediate inner peripheral surface 32 is a horizontal surface that is positioned on the radially outer side of the inner peripheral surface 41 b of the piston ring body 41 and forms a surface that faces the intermediate outer peripheral surface 51 that forms the recess 24.
- the first end surface 33 is a vertical surface that forms a plane that faces the end surface 53 that forms the recess 24 at the tip (side) of one end of the piston ring 21.
- the intermediate horizontal plane 34 is located on the side of one side surface (upper surface: top surface) 41c from the middle in the height direction (width direction) of the piston ring body 41, and forms a plane that faces the intermediate horizontal plane 52 that forms the recess 24. And is formed so as to be parallel to both side surfaces (upper surface 41c and lower surface 41d) of the piston ring body 41.
- the second end surface 35 is a curved surface that smoothly connects the proximal end of the intermediate horizontal plane 34 and the distal end of one side surface (upper surface) 41 c at the proximal end (side) of one end of the piston ring 21.
- the side surface (lower surface: bottom surface) 36 is a horizontal surface that forms the same surface as the other side surface (lower surface: bottom surface) 41 d of the piston ring body 41.
- the upper end of the first end surface 33 and the tip of the intermediate horizontal surface 34 are connected by a flat inclined surface 37, and the inner peripheral end of the intermediate horizontal surface 34 and the upper end of the intermediate inner peripheral surface 32 are curved surfaces 38. Connected by.
- the recess 24 is a recess formed so as to extend along the circumferential direction at the other end of the piston ring 21 and receive the projection 23, and includes an intermediate outer peripheral surface 51, an intermediate horizontal surface 52, and an end surface 53. And.
- the intermediate outer peripheral surface 51 is a horizontal surface that is located on the radially inner side of the outer peripheral surface 41 a of the piston ring body 41 and forms a surface that faces the intermediate inner peripheral surface 32 that forms the convex portion 23.
- the intermediate horizontal plane 52 is located on the side of one side surface (upper surface: top surface) 41c from the middle in the height direction (width direction) of the piston ring body 41, and is a plane facing the intermediate horizontal plane 34 forming the convex portion 23. It is a horizontal plane to be formed, and is formed so as to be parallel to both side surfaces (upper surface 41c and lower surface 41d) of the piston ring body 41.
- the end surface 53 is a vertical surface that forms a plane that faces the first end surface 33 that forms the convex portion 23 at the base end (side) of the other end of the piston ring 21.
- the upper end of the end surface 53 and the base end of the intermediate horizontal surface 52 are connected by a curved surface 54, and the inner peripheral end of the intermediate horizontal surface 52 and the upper end of the intermediate outer peripheral surface 51 are connected by a curved surface 55. .
- the gap g between the intermediate horizontal plane 34 and the intermediate horizontal plane 52, the gap g between the curved face 38 and the curved face 55, and the gap g between the intermediate inner peripheral face 32 and the intermediate outer peripheral face 51 are shown in FIG. 4 to 10 times the gap (0.0 mm to 0.05 mm) in the piston ring R1 having the conventional stepped joint (gas tight joint) shown in FIG. 28, that is, about 0.0 mm ⁇ g ⁇ 0.5 mm. It is set to be.
- the intermediate horizontal surface 34 and the intermediate horizontal surface 52, the curved surface 38 and the curved surface 55, and the intermediate inner peripheral surface 32 and the intermediate outer peripheral surface 51 overlap in the circumferential direction, that is, the intermediate horizontal surface 34, the intermediate horizontal surface 52, and the curved surface 38.
- the length in which the curved surface 55 and the intermediate inner peripheral surface 32 and the intermediate outer peripheral surface 51 overlap (overlap) in the circumferential direction is about 2 to 4 times the height (width) h of the piston ring body 41. Is set to
- FIG. 4 is an enlarged perspective view showing the main part of the piston ring according to this embodiment, which is the same as FIG.
- the piston ring 61 according to the present embodiment is different from that of the first embodiment described above in that gas passages (communication passages) 62 and 63 are provided instead of the gap g. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- symbol is attached
- the gas passage 62 has a rectangular shape in sectional view, which is carved on the side surface (upper surface: top surface) 41c of the piston ring main body 41 along the circumferential direction at the center in the thickness direction of the intermediate horizontal plane 52 ( A first circumferential groove, one end (front end) is open to the (front) end surface 25 (see FIG. 2) of the other end, and the other end (base end) is located above the inclined surface 37.
- the ring body 41 is opened at the other end portion or at the other end portion of the piston ring body 41 located on the curved surface 54 side with respect to the inclined surface 37.
- the gas passage 63 is a circumferential groove having a rectangular shape in cross section, carved on the side of the inner circumferential surface 41b of the piston ring body 41 along the circumferential direction at the central portion in the height direction of the intermediate outer circumferential surface 51.
- One end (front end) opens to the (front) end surface 25 (see FIG. 2) of the other end portion, and the other end (base end) is the other end portion of the piston ring main body 41 located radially inside the inclined surface 37.
- the piston ring body 41 is opened at the other end of the piston ring body 41 located on the curved surface 54 side of the inclined surface 37.
- the gas acting on the one side surface 41c is guided to the other side surface 41d through the gas passages 62 and 63.
- the load which self receives can be reduced and self wear can be reduced.
- the piston ring 61 even when the convex portion 23 and the concave portion 24 are brought into close contact with each other due to the pressure of the gas acting on the one side surface 41c, the gas acting on the one side surface 41c is applied to the other side surface 41d.
- the gas passages 62 and 63 for guiding are secured.
- the gas acting on one side surface 41 c can be guided to the other side surface 41 d regardless of the gap between the convex portion 23 and the concave portion 24, and the gap formed between the convex portion 23 and the concave portion 24 can be managed. It can be unnecessary.
- FIG. 5 is an enlarged perspective view showing the main part of the piston ring according to the present embodiment, which is the same as FIG.
- the piston ring 66 according to the present embodiment is different from that of the second embodiment described above in that gas passages (communication passages) 67 and 68 are provided instead of the gas passages (communication passages) 62 and 63. Since other components are the same as those in the above-described embodiment, description of these components is omitted here. In addition, the same code
- the gas passage 67 is a (second) circumferential groove that has a rectangular shape in cross-section and is carved on the side surface (lower surface: bottom surface) 36 along the circumferential direction at the center in the thickness direction of the intermediate horizontal plane 34.
- one end (distal end) is open to the inclined surface 37, and the other end (proximal end) is the intermediate horizontal surface 34 located below the (front) end surface 25 (see FIG. 2), or the (front) end surface 25 (FIG. 2), the intermediate horizontal surface 34 is located closer to the curved surface 35 (see FIG. 2).
- the gas passage 68 is a circumferential groove having a rectangular shape in sectional view, which is carved on the side of the outer circumferential surface 31 along the circumferential direction at the central portion in the height direction of the intermediate inner circumferential surface 32, and has one end (tip).
- the first end face 33 opens, and the other end (base end) is the intermediate inner peripheral surface 32 positioned below the (front) end face 25 (see FIG. 2), or the (front) end face 25 (see FIG. 2). It opens to the intermediate inner peripheral surface 32 located closer to the curved surface 35 (see FIG. 2).
- the gas acting on the one side surface 41 c is guided to the other side surface 41 d through the gas passages 67 and 68.
- the load which self receives can be reduced and self wear can be reduced.
- the piston ring 66 even when the convex portion 23 and the concave portion 24 are brought into close contact with each other due to the pressure of the gas acting on the one side surface 41c, the gas acting on the one side surface 41c is applied to the other side surface 41d.
- the guiding gas passages 67 and 68 are secured.
- the gas acting on one side surface 41 c can be guided to the other side surface 41 d regardless of the gap between the convex portion 23 and the concave portion 24, and the gap formed between the convex portion 23 and the concave portion 24 can be managed. It can be unnecessary.
- FIG. 6 is an enlarged perspective view showing the main part of the piston ring according to this embodiment, which is the same as FIG.
- the piston ring 71 according to the present embodiment is provided with the gas passages (communication passages) 62 and 63 described in the second embodiment and the gas passages (communication passages) 67 and 68 described in the third embodiment. This is different from that of the first embodiment described above. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- the gas acting on the one side surface 41 c is guided to the other side surface 41 d through the gas passages 62, 63, 67 and 68.
- the load which self receives can be reduced and self wear can be reduced.
- the piston ring 71 even when the convex portion 23 and the concave portion 24 are brought into close contact with each other due to the pressure of the gas acting on the one side surface 41c, the gas acting on the one side surface 41c is applied to the other side surface 41d.
- the gas passages 62, 63, 67, and 68 for guiding are secured.
- the gas acting on one side surface 41 c can be guided to the other side surface 41 d regardless of the gap between the convex portion 23 and the concave portion 24, and the gap formed between the convex portion 23 and the concave portion 24 can be managed. It can be unnecessary.
- FIG. 7 is an enlarged perspective view showing the main part of the piston ring according to this embodiment, which is the same as FIG.
- a gap g is formed between the intermediate horizontal plane 34 and the intermediate horizontal plane 52
- a gap g is formed between the curved surface 38 and the curved surface 55. It differs from that of the first embodiment described above. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- symbol is attached
- the piston ring 76 even if the piston ring 76 is deformed by the pressure of the gas acting on the one side surface 41c, complete adhesion between the convex portion 23 and the concave portion 24 is prevented (avoided), A gas passage (gap g) for guiding the gas acting on the one side surface 41c to the other side surface 41d is secured. Thereby, the load which self receives can be reduced and self wear can be reduced.
- FIG. 8 is an enlarged perspective view showing the main part of the piston ring according to the present embodiment, which is the same as FIG.
- a gap g is formed between the intermediate inner peripheral surface 32 and the intermediate outer peripheral surface 51, and a gap g is formed between the curved surface 38 and the curved surface 55.
- This is different from that of the first embodiment described above. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- symbol is attached
- the piston ring 81 According to the piston ring 81 according to the present embodiment, even if the piston ring 81 is deformed by the pressure of the gas acting on the one side surface 41c, complete adhesion between the convex portion 23 and the concave portion 24 is prevented (avoided), A gas passage (gap g) for guiding the gas acting on the one side surface 41c to the other side surface 41d is secured. Thereby, the load which self receives can be reduced and self wear can be reduced.
- FIG. 9 is an enlarged perspective view showing the main part of the piston ring according to the present embodiment, which is the same as FIG.
- the piston ring 86 according to this embodiment is provided with the gap g described in the fifth embodiment and the gap g described in the sixth embodiment. Different from the embodiment. Since the other components are the same as those in the fifth embodiment and the sixth embodiment described above, description of these components is omitted here.
- gaps g are formed between the intermediate horizontal surface 34 and the intermediate horizontal surface 52, between the curved surface 38 and the curved surface 55, and between the intermediate inner peripheral surface 32 and the intermediate outer peripheral surface 51, respectively. That is, what has the same form as 1st Embodiment is shown.
- the piston ring 86 even if the piston ring 86 is deformed by the pressure of the gas acting on the one side surface 41c, complete adhesion between the convex portion 23 and the concave portion 24 is prevented (avoided), A gas passage (gap g) for guiding the gas acting on the one side surface 41c to the other side surface 41d is secured. Thereby, the load which self receives can be reduced and self wear can be reduced.
- FIG. 10 is an enlarged perspective view showing the main part of the piston ring according to this embodiment, which is the same as FIG.
- the piston ring 91 according to the present embodiment is different from that of the first embodiment described above in that gas passages (communication passages) 92 and 93 are provided instead of the gap g. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- symbol is attached
- the gas passage 92 has a semicircular shape in sectional view, which is carved on the side of one side surface (upper surface: top surface) 41c of the piston ring main body 41 along the circumferential direction at the central portion in the thickness direction of the intermediate horizontal plane 52. It is a circumferential groove, one end (front end) opens to the (front) end face 25 (see FIG. 2) of the other end, and the other end (base end) of the piston ring main body 41 located above the inclined surface 37. The other end portion or the other end portion of the piston ring main body 41 located closer to the curved surface 54 than the inclined surface 37 opens.
- the gas passage 93 is a circumferential groove having a semicircular shape in sectional view, which is carved on the inner circumferential surface 41b side of the piston ring main body 41 along the circumferential direction at the central portion in the height direction of the intermediate outer circumferential surface 51.
- One end (front end) opens to the (front) end face 25 (see FIG. 2) of the other end, and the other end (base end) is the other end of the piston ring main body 41 located radially inside the inclined surface 37. Or the other end portion of the piston ring main body 41 located closer to the curved surface 54 than the inclined surface 37.
- the gas acting on the one side surface 41c is guided to the other side surface 41d through the gas passages 92 and 93.
- the load which self receives can be reduced and self wear can be reduced.
- the piston ring 91 even when the convex portion 23 and the concave portion 24 are brought into close contact with each other due to the pressure of the gas acting on the one side surface 41c, the gas acting on the one side surface 41c is applied to the other side surface 41d.
- the guiding gas passages 92 and 93 are secured.
- the gas acting on one side surface 41 c can be guided to the other side surface 41 d regardless of the gap between the convex portion 23 and the concave portion 24, and the gap formed between the convex portion 23 and the concave portion 24 can be managed. It can be unnecessary.
- FIG. 11 is an enlarged perspective view showing the main part of the piston ring according to this embodiment, which is the same as FIG.
- the piston ring 96 according to the present embodiment is different from that of the eighth embodiment described above in that gas passages (communication passages) 97 and 98 are provided instead of the gas passages (communication passages) 92 and 93. Since other components are the same as those in the above-described embodiment, description of these components is omitted here. In addition, the same code
- the gas passage 97 is a circumferential groove having a semicircular shape in sectional view, which is carved on the side surface (lower surface: bottom surface) 36 along the circumferential direction at the central portion in the thickness direction of the intermediate horizontal plane 34 and has one end ( The front end is open to the inclined surface 37, and the other end (base end) is from the intermediate horizontal plane 34 positioned below the (front) end surface 25 (see FIG. 2) or from the (front) end surface 25 (see FIG. 2). Is also open to the intermediate horizontal plane 34 located on the curved surface 35 (see FIG. 2) side.
- the gas passage 98 is a circumferential groove having a semicircular shape in sectional view, which is carved on the side of the outer circumferential surface 31 along the circumferential direction at the center in the height direction of the intermediate inner circumferential surface 32, and has one end (tip). Is open to the first end surface 33, and the other end (base end) is the intermediate inner peripheral surface 32 positioned below the (front) end surface 25 (see FIG. 2) or the (front) end surface 25 (see FIG. 2). ) To the intermediate inner peripheral surface 32 located on the curved surface 35 (see FIG. 2) side.
- the gas acting on the one side surface 41 c is guided to the other side surface 41 d through the gas passages 97 and 98.
- the load which self receives can be reduced and self wear can be reduced.
- the piston ring 96 even when the convex portion 23 and the concave portion 24 are brought into close contact with each other by the pressure of the gas acting on the one side surface 41c, the gas acting on the one side surface 41c is applied to the other side surface 41d.
- the guiding gas passages 97 and 98 are secured.
- the gas acting on one side surface 41 c can be guided to the other side surface 41 d regardless of the gap between the convex portion 23 and the concave portion 24, and the gap formed between the convex portion 23 and the concave portion 24 can be managed. It can be unnecessary.
- FIG. 12 is an enlarged perspective view showing the main part of the piston ring according to the present embodiment, which is the same as FIG.
- the piston ring 101 according to this embodiment is provided with the gas passages (communication passages) 92 and 93 described in the eighth embodiment and the gas passages (communication passages) 97 and 98 described in the ninth embodiment. This is different from that of the first embodiment described above. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- the gas acting on the one side surface 41c is guided to the other side surface 41d through the gas passages 92, 93, 97, and 98.
- the load which self receives can be reduced and self wear can be reduced.
- the piston ring 101 even when the convex portion 23 and the concave portion 24 are brought into close contact with each other due to the pressure of the gas acting on the one side surface 41c, the gas acting on the one side surface 41c is applied to the other side surface 41d.
- the gas passages 92, 93, 97 and 98 for guiding are secured.
- the gas acting on one side surface 41 c can be guided to the other side surface 41 d regardless of the gap between the convex portion 23 and the concave portion 24, and the gap formed between the convex portion 23 and the concave portion 24 can be managed. It can be unnecessary.
- FIG. 13 is an enlarged perspective view showing the main part of the piston ring according to this embodiment, which is the same as FIG.
- the piston ring 106 according to the present embodiment is different from that of the first embodiment described above in that gas passages (communication passages) 107 and 108 are provided instead of the gap g. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- symbol is attached
- the gas passage 107 has a triangular shape in a cross-sectional view (in this embodiment), which is carved on one side (upper surface: top surface) 41c side of the piston ring main body 41 along the circumferential direction at the center in the thickness direction of the intermediate horizontal plane 52. In the form, it is a circumferential groove having an equilateral triangle shape.
- One end (tip) is open to the (front) end surface 25 (see FIG. 2) of the other end, and the other end (base end) is above the inclined surface 37.
- the other end of the piston ring main body 41 located at the side or the other end of the piston ring main body 41 located closer to the curved surface 54 than the inclined surface 37 opens.
- the gas passage 108 has a triangular shape (in the present embodiment, a regular triangle) engraved on the side of the inner peripheral surface 41b of the piston ring body 41 along the circumferential direction at the central portion in the height direction of the intermediate outer peripheral surface 51. 1) (one end (tip)) is open on the (end) end face 25 (see FIG. 2) of the other end, and the other end (base end) is located on the radially inner side of the inclined surface 37. The other end of the piston ring main body 41 is opened, or the other end of the piston ring main body 41 located closer to the curved surface 54 than the inclined surface 37 opens.
- a triangular shape in the present embodiment, a regular triangle
- the gas acting on the one side surface 41 c is guided to the other side surface 41 d through the gas passages 107 and 108.
- the load which self receives can be reduced and self wear can be reduced.
- the piston ring 106 even when the convex portion 23 and the concave portion 24 are in close contact with each other due to the pressure of the gas acting on the one side surface 41c, the gas acting on the one side surface 41c is applied to the other side surface 41d.
- the gas passages 107 and 108 for guiding are secured.
- the gas acting on one side surface 41 c can be guided to the other side surface 41 d regardless of the gap between the convex portion 23 and the concave portion 24, and the gap formed between the convex portion 23 and the concave portion 24 can be managed. It can be unnecessary.
- FIG. 14 is an enlarged perspective view showing the main part of the piston ring according to this embodiment, which is the same as FIG.
- the piston ring 111 according to this embodiment is different from that of the eleventh embodiment described above in that gas passages (communication passages) 112 and 113 are provided instead of the gas passages (communication passages) 107 and 108. Since other components are the same as those in the above-described embodiment, description of these components is omitted here. In addition, the same code
- the gas passage 112 has a triangular shape (regular triangle shape in this embodiment) engraved on the side surface (lower surface: bottom surface) 36 along the circumferential direction at the central portion in the thickness direction of the intermediate horizontal plane 34.
- One end (tip) is open to the inclined surface 37, and the other end (base end) is an intermediate horizontal plane 34 located below the (front) end surface 25 (see FIG. 2), or (front). It opens in the intermediate
- the gas passage 113 has a triangular shape (in the present embodiment, a regular triangle shape) engraved on the side of the outer peripheral surface 31 along the circumferential direction at the central portion in the height direction of the intermediate inner peripheral surface 32.
- One end (front end) of the groove is open to the first end surface 33, and the other end (base end) is the intermediate inner peripheral surface 32 positioned below the (front) end surface 25 (see FIG. 2), or ( First, it opens to the intermediate inner peripheral surface 32 located on the curved surface 35 (see FIG. 2) side than the end surface 25 (see FIG. 2).
- the gas acting on the one side surface 41c is guided to the other side surface 41d through the gas passages 112 and 113.
- the load which self receives can be reduced and self wear can be reduced.
- the piston ring 111 even when the convex portion 23 and the concave portion 24 are brought into close contact with each other due to the pressure of the gas acting on the one side surface 41c, the gas acting on the one side surface 41c is applied to the other side surface 41d.
- the gas passages 112 and 113 for guiding are secured.
- the gas acting on one side surface 41 c can be guided to the other side surface 41 d regardless of the gap between the convex portion 23 and the concave portion 24, and the gap formed between the convex portion 23 and the concave portion 24 can be managed. It can be unnecessary.
- FIG. 15 is an enlarged perspective view showing the main part of the piston ring according to this embodiment, which is the same as FIG.
- the piston ring 116 according to this embodiment is provided with the gas passages (communication passages) 107 and 108 described in the eleventh embodiment and the gas passages (communication passages) 112 and 113 described in the twelfth embodiment. This is different from that of the first embodiment described above. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- the gas acting on the one side surface 41c is guided to the other side surface 41d through the gas passages 107, 108, 112, and 113.
- the load which self receives can be reduced and self wear can be reduced.
- the piston ring 116 even when the convex portion 23 and the concave portion 24 are brought into close contact with each other due to the pressure of the gas acting on the one side surface 41c, the gas acting on the one side surface 41c is applied to the other side surface 41d.
- the gas passages 107, 108, 112, and 113 for guiding are secured.
- the gas acting on one side surface 41 c can be guided to the other side surface 41 d regardless of the gap between the convex portion 23 and the concave portion 24, and the gap formed between the convex portion 23 and the concave portion 24 can be managed. It can be unnecessary.
- FIG. 16 is an enlarged perspective view showing the main part of the piston ring according to this embodiment, which is the same as FIG.
- the piston ring 121 according to the present embodiment is different from that of the first embodiment described above in that a notch 122 is provided instead of the gap g. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- symbol is attached
- the notch 122 is formed by a flat inclined surface or curved surface that connects the inner peripheral end of the intermediate horizontal surface 34 and the upper end of the intermediate inner peripheral surface 32, and one end (tip) extends to the inclined surface 37.
- the end (base end) extends to a position below the (front) end surface 25 (see FIG. 2) or to a position closer to the curved surface 35 (see FIG. 2) than the (front) end surface 25 (see FIG. 2). Yes.
- the gas acting on the one side surface 41 c passes through a gap (gas passage) formed between the inclined surface or curved surface forming the notch 122 and the recess 24.
- a gap gas passage formed between the inclined surface or curved surface forming the notch 122 and the recess 24.
- the load which self receives can be reduced and self wear can be reduced.
- the piston ring 121 even when the convex portion 23 and the concave portion 24 are brought into close contact with each other by the pressure of the gas acting on the one side surface 41c, the gas acting on the one side surface 41c is applied to the other side surface 41d. A guiding gap (gas passage) is secured. As a result, the gas acting on one side surface 41 c can be guided to the other side surface 41 d regardless of the gap between the convex portion 23 and the concave portion 24, and the gap formed between the convex portion 23 and the concave portion 24 can be managed. It can be unnecessary.
- FIG. 17 is an enlarged perspective view showing the main part of the piston ring according to this embodiment, which is the same as FIG.
- the piston ring 126 according to the present embodiment is different from that of the first embodiment described above in that a notch 127 is provided instead of the gap g. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- symbol is attached
- the notch 127 is formed by a flat inclined surface or curved surface that connects the lower end of the intermediate inner peripheral surface 32 and the inner peripheral end of the side surface 36, and one end (front end) extends to the first end surface 33, The other end (base end) extends to a position below the (front) end face 25 (see FIG. 2) or to a position closer to the curved surface 35 (see FIG. 2) than the (front) end face 25 (see FIG. 2). ing.
- the gas acting on the one side surface 41 c passes through the gap (gas passage) formed between the inclined surface forming the notch 127 and the recess 24, and the other side surface. It will be guided to 41d. Thereby, the load which self receives can be reduced and self wear can be reduced.
- the piston ring 126 even when the convex portion 23 and the concave portion 24 are brought into close contact with each other by the pressure of the gas acting on the one side surface 41c, the gas acting on the one side surface 41c is applied to the other side surface 41d. A guiding gap (gas passage) is secured. As a result, the gas acting on one side surface 41 c can be guided to the other side surface 41 d regardless of the gap between the convex portion 23 and the concave portion 24, and the gap formed between the convex portion 23 and the concave portion 24 can be managed. It can be unnecessary.
- FIG. 18 is an enlarged perspective view showing the main part of the piston ring according to this embodiment, which is the same as FIG.
- the piston ring 131 according to the present embodiment is the same as that of the first embodiment described above in that the notch 122 described in the fourteenth embodiment and the notch 127 described in the fifteenth embodiment are provided. Different from the one. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- the gas acting on the one side surface 41c is a gap (gas passage) formed between the inclined surface or the curved surface forming the notch 122 and the recess 24, and It is guided to the other side surface 41d through a gap (gas passage) formed between the inclined surface or the curved surface forming the notch 127 and the recess 24.
- the piston ring 131 According to the piston ring 131 according to the present embodiment, even when the convex portion 23 and the concave portion 24 are brought into close contact with each other due to the pressure of the gas acting on the one side surface 41c, the gas acting on the one side surface 41c is applied to the other side surface 41d. A guiding gap (gas passage) is secured. As a result, the gas acting on one side surface 41 c can be guided to the other side surface 41 d regardless of the gap between the convex portion 23 and the concave portion 24, and the gap formed between the convex portion 23 and the concave portion 24 can be managed. It can be unnecessary.
- FIG. 19 is an enlarged perspective view showing the main part of the piston ring according to this embodiment, which is the same as FIG.
- the piston ring 136 according to the present embodiment is different from that of the first embodiment described above in that a gas passage (communication passage) 137 is provided instead of the gap g. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- symbol is attached
- the gas passage 137 connects the inner peripheral edge of the intermediate horizontal surface 52 and the upper end of the intermediate outer peripheral surface 51, and is disposed on one side (upper surface: top surface) 41 c and the inner peripheral surface 41 b side along the circumferential direction. Is a circumferential groove having a circular shape of 3/4 in cross section, with one end (tip) opening in the (front) end face 25 (see FIG. 2) of the other end and the other end (base end) The other end of the piston ring main body 41 located above the inclined surface 37 or the other end of the piston ring main body 41 positioned closer to the curved surface 54 than the inclined surface 37 is opened.
- the gas acting on the one side surface 41c is guided to the other side surface 41d through the gas passage 137.
- the load which self receives can be reduced and self wear can be reduced.
- the piston ring 136 according to the present embodiment, even when the convex portion 23 and the concave portion 24 are brought into close contact with each other due to the pressure of the gas acting on the one side surface 41c, the gas acting on the one side surface 41c is applied to the other side surface 41d. A gas passage 137 for guiding is secured. As a result, the gas acting on one side surface 41 c can be guided to the other side surface 41 d regardless of the gap between the convex portion 23 and the concave portion 24, and the gap formed between the convex portion 23 and the concave portion 24 can be managed. It can be unnecessary.
- FIG. 20 is an enlarged perspective view showing the main part of the piston ring according to this embodiment, which is the same as FIG.
- the piston ring 141 according to the present embodiment is different from that of the first embodiment described above in that a notch 142 is provided instead of the gap g. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- symbol is attached
- the notch 142 is formed by a flat inclined surface or curved surface that connects the lower end of the intermediate outer peripheral surface 51 and the outer peripheral end of the other side surface (lower surface: bottom surface) 41d at the other end of the piston ring body 41,
- One end (front end) extends to the lower side of the (front) end face 25 (see FIG. 2) of the other end, and the other end (base end) is radially inward of the first end face 33 or from the first end face 33. Also extends to a position located on the end face 53 side.
- the gas acting on the one side surface 41 c passes through a gap (gas passage) formed between the inclined surface or curved surface forming the notch 142 and the recess 24.
- a gap gas passage formed between the inclined surface or curved surface forming the notch 142 and the recess 24.
- the load which self receives can be reduced and self wear can be reduced.
- the piston ring 141 even when the convex portion 23 and the concave portion 24 are brought into close contact with each other due to the pressure of the gas acting on the one side surface 41c, the gas acting on the one side surface 41c is applied to the other side surface 41d. A guiding gap (gas passage) is secured. As a result, the gas acting on one side surface 41 c can be guided to the other side surface 41 d regardless of the gap between the convex portion 23 and the concave portion 24, and the gap formed between the convex portion 23 and the concave portion 24 can be managed. It can be unnecessary.
- FIG. 21 is an enlarged perspective view showing the main part of the piston ring according to this embodiment, which is the same as FIG.
- the piston ring 146 according to the present embodiment is the same as that of the first embodiment described above in that the gas passage 137 described in the seventeenth embodiment and the notch 142 described in the eighteenth embodiment are provided. Different from the one. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- FIG. 22 is an enlarged perspective view showing the main part of the piston ring according to this embodiment, which is the same as FIG.
- the piston ring 151 according to the present embodiment is the same as that of the first embodiment described above in that the gas passage 62 described in the second embodiment and the gas passage 67 described in the third embodiment are provided. Different from the one. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- the gas acting on the one side surface 41c is guided to the other side surface 41d through the gas passages 62 and 67.
- the load which self receives can be reduced and self wear can be reduced.
- the piston ring 151 even when the convex portion 23 and the concave portion 24 are brought into close contact with each other due to the pressure of the gas acting on the one side surface 41c, the gas acting on the one side surface 41c is applied to the other side surface 41d.
- the gas passages 62 and 67 for guiding are secured.
- the gas acting on one side surface 41 c can be guided to the other side surface 41 d regardless of the gap between the convex portion 23 and the concave portion 24, and the gap formed between the convex portion 23 and the concave portion 24 can be managed. It can be unnecessary.
- FIG. 23 is an enlarged perspective view showing the main part of the piston ring according to this embodiment, which is the same as FIG.
- the piston ring 156 according to the present embodiment is the same as that of the first embodiment described above in that the notch 122 described in the fourteenth embodiment and the gas passage 137 described in the seventeenth embodiment are provided. Different from the one. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- FIG. 24 is an enlarged perspective view showing the main part of the piston ring according to this embodiment, which is the same as FIG.
- the piston ring 161 according to the present embodiment is the same as that of the first embodiment described above in that the notch 127 described in the fifteenth embodiment and the notch 142 described in the eighteenth embodiment are provided. Different from the one. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- FIG. 25 is an enlarged perspective view showing a main part of the piston ring according to the present embodiment, which is the same as FIG.
- the piston ring 166 according to this embodiment includes the notch 122 described in the fourteenth embodiment, the notch 127 described in the fifteenth embodiment, the gas passage 137 described in the seventeenth embodiment, It differs from that of the first embodiment described above in that the notch 142 described in the eighteenth embodiment is provided. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
- the best workability when machining the notch is that of the fourteenth embodiment shown in FIG. 16, and the best workability when machining the circumferential groove. These are those of the twentieth embodiment shown in FIG.
- the present invention is not limited to the above-described embodiment, and the above-described embodiment may be appropriately combined as necessary, or the above-described embodiment may be appropriately modified or changed as necessary. it can.
- piston ring according to the present invention can also be used for piston rings in the second stage and thereafter (piston rings after the second ring).
- the piston 2 in which the three ring grooves 3, 4 and 5 are formed in the height direction has been described as a specific example, but the piston according to the present invention is limited to this. It may be a piston in which one, two, four or more ring grooves are formed in the height direction.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
Abstract
Description
また、特許文献2に開示されたピストン・トップ・リング4では、外周面(摺動面)に設けられた溝15の角でシリンダライナの内壁面に掻き傷が付いてしまったり、外周面に耐摩耗コーティングが施されている場合、その耐摩耗コーティングが溝15の角から剥離してしまうおそれがある。
本発明の第1の態様に係るピストンリングは、一端部に凸部を備え、他端部に凹部を備えるとともに、これら凸部と凹部とにより段付き合口が形成されるピストンリングであって、前記凸部と前記凹部との間に、一側面に作用するガスを他側面に導くガス通路が設けられている。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
これにより、凸部と凹部との隙間に関係なく一側面に作用するガスを他側面に導くことができて、凸部と凹部との間に形成される隙間の管理を不要とすることができる。
また、例えば、図8に示すピストンリング81等においては、上面にかかるガス圧に対する強度においても有利である。
また、ピストンリングとシリンダライナとの摺動面でないところに周溝を設けているため、溝の角でシリンダライナの内壁面に掻き傷を付けることはない。
また、ピストンリングとシリンダライナとの摺動面でないところに周溝を設けているため、溝の角でシリンダライナの内壁面に掻き傷を付けることはない。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
これにより、ピストンリングおよびシリンダライナ摩耗後も、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
以下、本発明の第1実施形態に係るピストンリングについて、図1から図3、図26および図27を参照しながら説明する。
図1は本実施形態に係るピストンリングの斜視図、図2は図1において二点鎖線で囲まれた部分を拡大して示す図、図3は図2のA-A矢視断面図、図26は舶用大型2サイクルディーゼルエンジン(以下、「ディーゼルエンジン1」という。)の燃焼室周りの概略断面図、図27はピストンリング装着部近傍の部分断面図である。
図1から図3の少なくとも一図に示すように、段付き合口22は、凸部(雄部)23と、凹部(雌部)24とを備えている。
凸部23は、ピストンリング21の一端部において、周方向に沿って延びるとともに、凹部24内に嵌り込むようにして形成された突状の部材であり、外周面(摺動面)31と、中間内周面32と、第1の端面33と、中間水平面34と、第2の端面35と、側面(下面:底面)36とを備えている。
中間内周面32は、ピストンリング本体41の内周面41bよりも半径方向外側に位置して、凹部24を形成する中間外周面51と対向する面を形成する水平面である。
中間水平面34は、ピストンリング本体41の高さ方向(幅方向)における中間よりも一側面(上面:頂面)41c側に位置して、凹部24を形成する中間水平面52と対向する平面を形成する水平面であり、ピストンリング本体41の両側面(上面41cおよび下面41d)と平行になるようにして形成されている。
側面(下面:底面)36は、ピストンリング本体41における他側面(下面:底面)41dと連続して同一面を形成する水平面である。
中間水平面52は、ピストンリング本体41の高さ方向(幅方向)における中間よりも一側面(上面:頂面)41c側に位置して、凸部23を形成する中間水平面34と対向する平面を形成する水平面であり、ピストンリング本体41の両側面(上面41cおよび下面41d)と平行になるようにして形成されている。
なお、端面53の上端と、中間水平面52の基端とは、湾曲面54により接続され、中間水平面52の内周端と、中間外周面51の上端とは、湾曲面55により接続されている。
また、中間水平面34と中間水平面52、湾曲面38と湾曲面55、および中間内周面32と中間外周面51との周方向における重なり、すなわち、中間水平面34と中間水平面52、湾曲面38と湾曲面55、および中間内周面32と中間外周面51とが周方向に重なる(オーバーラップする)長さは、ピストンリング本体41の高さ(幅)hの2倍~4倍程度となるように設定されている。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
本発明の第2実施形態に係るピストンリングについて、図4を参照しながら説明する。図4は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング61は、隙間gの代わりにガス通路(連通路)62,63が設けられているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
なお、上述した第1実施形態と同一の部材には同一の符号を付している。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
これにより、凸部23と凹部24との隙間に関係なく一側面41cに作用するガスを他側面41dに導くことができて、凸部23と凹部24との間に形成される隙間の管理を不要とすることができる。
本発明の第3実施形態に係るピストンリングについて、図5を参照しながら説明する。図5は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング66は、ガス通路(連通路)62,63の代わりにガス通路(連通路)67,68が設けられているという点で上述した第2実施形態のものと異なる。その他の構成要素については上述した実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
なお、上述した実施形態と同一の部材には同一の符号を付している。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
これにより、凸部23と凹部24との隙間に関係なく一側面41cに作用するガスを他側面41dに導くことができて、凸部23と凹部24との間に形成される隙間の管理を不要とすることができる。
本発明の第4実施形態に係るピストンリングについて、図6を参照しながら説明する。図6は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング71は、第2実施形態のところで説明したガス通路(連通路)62,63と、第3実施形態のところで説明したガス通路(連通路)67,68とが設けられているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
これにより、凸部23と凹部24との隙間に関係なく一側面41cに作用するガスを他側面41dに導くことができて、凸部23と凹部24との間に形成される隙間の管理を不要とすることができる。
本発明の第5実施形態に係るピストンリングについて、図7を参照しながら説明する。図7は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング76は、中間水平面34と中間水平面52との間に隙間gが形成されるとともに、湾曲面38と湾曲面55との間に隙間gが形成されているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
なお、上述した第1実施形態と同一の部材には同一の符号を付している。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
本発明の第6実施形態に係るピストンリングについて、図8を参照しながら説明する。図8は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング81は、中間内周面32と中間外周面51との間に隙間gが形成されるとともに、湾曲面38と湾曲面55との間に隙間gが形成されているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
なお、上述した第1実施形態と同一の部材には同一の符号を付している。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
本発明の第7実施形態に係るピストンリングについて、図9を参照しながら説明する。図9は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング86は、第5実施形態のところで説明した隙間gと、第6実施形態のところで説明した隙間gとが設けられているという点で上述した第5実施形態および第6実施形態のものと異なる。その他の構成要素については上述した第5実施形態および第6実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
なお、図9には、中間水平面34と中間水平面52との間、湾曲面38と湾曲面55との間、および中間内周面32と中間外周面51との間にそれぞれ隙間gが形成されているもの、すなわち、第1実施形態と同じ形態を有するものを示している。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
本発明の第8実施形態に係るピストンリングについて、図10を参照しながら説明する。図10は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング91は、隙間gの代わりにガス通路(連通路)92,93が設けられているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
なお、上述した第1実施形態と同一の部材には同一の符号を付している。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
これにより、凸部23と凹部24との隙間に関係なく一側面41cに作用するガスを他側面41dに導くことができて、凸部23と凹部24との間に形成される隙間の管理を不要とすることができる。
本発明の第9実施形態に係るピストンリングについて、図11を参照しながら説明する。図11は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング96は、ガス通路(連通路)92,93の代わりにガス通路(連通路)97,98が設けられているという点で上述した第8実施形態のものと異なる。その他の構成要素については上述した実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
なお、上述した実施形態と同一の部材には同一の符号を付している。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
これにより、凸部23と凹部24との隙間に関係なく一側面41cに作用するガスを他側面41dに導くことができて、凸部23と凹部24との間に形成される隙間の管理を不要とすることができる。
本発明の第10実施形態に係るピストンリングについて、図12を参照しながら説明する。図12は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング101は、第8実施形態のところで説明したガス通路(連通路)92,93と、第9実施形態のところで説明したガス通路(連通路)97,98とが設けられているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
これにより、凸部23と凹部24との隙間に関係なく一側面41cに作用するガスを他側面41dに導くことができて、凸部23と凹部24との間に形成される隙間の管理を不要とすることができる。
本発明の第11実施形態に係るピストンリングについて、図13を参照しながら説明する。図13は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング106は、隙間gの代わりにガス通路(連通路)107,108が設けられているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
なお、上述した第1実施形態と同一の部材には同一の符号を付している。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
これにより、凸部23と凹部24との隙間に関係なく一側面41cに作用するガスを他側面41dに導くことができて、凸部23と凹部24との間に形成される隙間の管理を不要とすることができる。
本発明の第12実施形態に係るピストンリングについて、図14を参照しながら説明する。図14は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング111は、ガス通路(連通路)107,108の代わりにガス通路(連通路)112,113が設けられているという点で上述した第11実施形態のものと異なる。その他の構成要素については上述した実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
なお、上述した実施形態と同一の部材には同一の符号を付している。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
これにより、凸部23と凹部24との隙間に関係なく一側面41cに作用するガスを他側面41dに導くことができて、凸部23と凹部24との間に形成される隙間の管理を不要とすることができる。
本発明の第13実施形態に係るピストンリングについて、図15を参照しながら説明する。図15は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング116は、第11実施形態のところで説明したガス通路(連通路)107,108と、第12実施形態のところで説明したガス通路(連通路)112,113とが設けられているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
これにより、凸部23と凹部24との隙間に関係なく一側面41cに作用するガスを他側面41dに導くことができて、凸部23と凹部24との間に形成される隙間の管理を不要とすることができる。
本発明の第14実施形態に係るピストンリングについて、図16を参照しながら説明する。図16は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング121は、隙間gの代わりに切欠き122が設けられているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
なお、上述した第1実施形態と同一の部材には同一の符号を付している。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
これにより、凸部23と凹部24との隙間に関係なく一側面41cに作用するガスを他側面41dに導くことができて、凸部23と凹部24との間に形成される隙間の管理を不要とすることができる。
本発明の第15実施形態に係るピストンリングについて、図17を参照しながら説明する。図17は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング126は、隙間gの代わりに切欠き127が設けられているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
なお、上述した第1実施形態と同一の部材には同一の符号を付している。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
これにより、凸部23と凹部24との隙間に関係なく一側面41cに作用するガスを他側面41dに導くことができて、凸部23と凹部24との間に形成される隙間の管理を不要とすることができる。
本発明の第16実施形態に係るピストンリングについて、図18を参照しながら説明する。図18は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング131は、第14実施形態のところで説明した切欠き122と、第15実施形態のところで説明した切欠き127とが設けられているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
これにより、凸部23と凹部24との隙間に関係なく一側面41cに作用するガスを他側面41dに導くことができて、凸部23と凹部24との間に形成される隙間の管理を不要とすることができる。
本発明の第17実施形態に係るピストンリングについて、図19を参照しながら説明する。図19は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング136は、隙間gの代わりにガス通路(連通路)137が設けられているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
なお、上述した第1実施形態と同一の部材には同一の符号を付している。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
これにより、凸部23と凹部24との隙間に関係なく一側面41cに作用するガスを他側面41dに導くことができて、凸部23と凹部24との間に形成される隙間の管理を不要とすることができる。
本発明の第18実施形態に係るピストンリングについて、図20を参照しながら説明する。図20は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング141は、隙間gの代わりに切欠き142が設けられているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
なお、上述した第1実施形態と同一の部材には同一の符号を付している。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
これにより、凸部23と凹部24との隙間に関係なく一側面41cに作用するガスを他側面41dに導くことができて、凸部23と凹部24との間に形成される隙間の管理を不要とすることができる。
本発明の第19実施形態に係るピストンリングについて、図21を参照しながら説明する。図21は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング146は、第17実施形態のところで説明したガス通路137と、第18実施形態のところで説明した切欠き142とが設けられているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
本発明の第20実施形態に係るピストンリングについて、図22を参照しながら説明する。図22は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング151は、第2実施形態のところで説明したガス通路62と、第3実施形態のところで説明したガス通路67とが設けられているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
これにより、自身の受ける負荷を低減させて、自身の摩耗を低減させることができる。
これにより、凸部23と凹部24との隙間に関係なく一側面41cに作用するガスを他側面41dに導くことができて、凸部23と凹部24との間に形成される隙間の管理を不要とすることができる。
本発明の第21実施形態に係るピストンリングについて、図23を参照しながら説明する。図23は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング156は、第14実施形態のところで説明した切欠き122と、第17実施形態のところで説明したガス通路137とが設けられているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
本発明の第22実施形態に係るピストンリングについて、図24を参照しながら説明する。図24は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング161は、第15実施形態のところで説明した切欠き127と、第18実施形態のところで説明した切欠き142とが設けられているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
本発明の第23実施形態に係るピストンリングについて、図25を参照しながら説明する。図25は本実施形態に係るピストンリングの要部を拡大して示す斜視図であって、図3と同様の図である。
本実施形態に係るピストンリング166は、第14実施形態のところで説明した切欠き122と、第15実施形態のところで説明した切欠き127と、第17実施形態のところで説明したガス通路137と、第18実施形態のところで説明した切欠き142とが設けられているという点で上述した第1実施形態のものと異なる。その他の構成要素については上述した第1実施形態のものと同じであるので、ここではそれら構成要素についての説明は省略する。
2 ピストン
3 リング溝
4 リング溝
5 リング溝
21 ピストンリング
22 段付き合口
23 凸部
24 凹部
32 中間内周面
34 中間水平面
51 中間外周面
52 中間水平面
61 ピストンリング
62 (第1の)周溝(ガス通路)
63 周溝(ガス通路)
66 ピストンリング
67 (第2の)周溝(ガス通路)
68 周溝(ガス通路)
71 ピストンリング
76 ピストンリング
81 ピストンリング
86 ピストンリング
91 ピストンリング
92 周溝(ガス通路)
93 周溝(ガス通路)
96 ピストンリング
97 周溝(ガス通路)
98 周溝(ガス通路)
101 ピストンリング
106 ピストンリング
107 周溝(ガス通路)
108 周溝(ガス通路)
111 ピストンリング
112 周溝(ガス通路)
113 周溝(ガス通路)
116 ピストンリング
121 ピストンリング
122 切欠き
126 ピストンリング
127 切欠き
131 ピストンリング
136 ピストンリング
137 周溝(ガス通路)
141 ピストンリング
142 切欠き
146 ピストンリング
151 ピストンリング
156 ピストンリング
161 ピストンリング
166 ピストンリング
g 隙間
h ピストンリングの高さ(幅)
Claims (10)
- 一端部に凸部を備え、他端部に凹部を備えるとともに、これら凸部と凹部とにより段付き合口が形成されるピストンリングであって、
前記凸部と前記凹部との間に、一側面に作用するガスを他側面に導くガス通路が設けられているピストンリング。 - 前記ガス通路は、前記凸部および/または前記凹部に、周方向に沿って形成された切欠きおよび/または周溝および/または前記凸部と前記凹部との間に形成された隙間からなる請求項1に記載のピストンリング。
- 前記切欠きは、前記凸部を形成する中間水平面の内周端と、前記凸部を形成する中間内周面の上端とを接続する平坦な傾斜面により形成されている請求項2に記載のピストンリング。
- 前記周溝は、前記凹部を形成する中間水平面の厚さ方向における中央部において、周方向に沿って前記一側面の側に彫り込まれた、断面視矩形状を呈する第1の周溝と、前記凸部を形成する中間水平面の厚さ方向における中央部において、周方向に沿って他側面の側に彫り込まれた、断面視矩形状を呈する第2の周溝とを備えている請求項2に記載のピストンリング。
- 前記凸部と前記凹部との間に形成された隙間は、従来の段付き合口を備えたピストンリングにおける隙間の4倍~10倍程度となるように設定されている請求項2に記載のピストンリング。
- 前記凸部と前記凹部との周方向における重なりは、当該ピストンリングの高さの2倍~4倍程度となるように設定されている請求項1から5のいずれか一項に記載のピストンリング。
- 請求項1から6のいずれか一項に記載のピストンリングと、
直角合口を備えたピストンリングおよび/または斜合口を備えたピストンリングと、を備えているピストンリングセット。 - 請求項1から6のいずれか一項に記載のピストンリングのみを備えているピストンリングセット。
- 請求項1から6のいずれか一項に記載のピストンリングが、リング溝に嵌挿されているピストン。
- 請求項7または8に記載のピストンリングセット、もしくは請求項9に記載のピストンを具備している内燃機関。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201280002290.2A CN103052833B (zh) | 2011-02-28 | 2012-02-27 | 活塞环 |
KR1020137002647A KR101545790B1 (ko) | 2011-02-28 | 2012-02-27 | 피스톤 링 |
KR20157004745A KR20150032594A (ko) | 2011-02-28 | 2012-02-27 | 피스톤 링 |
KR1020157032682A KR101680510B1 (ko) | 2011-02-28 | 2012-02-27 | 피스톤 링 |
KR1020167009166A KR101727869B1 (ko) | 2011-02-28 | 2012-02-27 | 피스톤 링 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011043268A JP5781332B2 (ja) | 2011-02-28 | 2011-02-28 | ピストンリング |
JP2011-043268 | 2011-02-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012117987A1 true WO2012117987A1 (ja) | 2012-09-07 |
Family
ID=46757921
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/054697 WO2012117987A1 (ja) | 2011-02-28 | 2012-02-27 | ピストンリング |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP5781332B2 (ja) |
KR (4) | KR101545790B1 (ja) |
CN (2) | CN103052833B (ja) |
WO (1) | WO2012117987A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3889471A1 (en) * | 2020-04-02 | 2021-10-06 | Winterthur Gas & Diesel Ltd. | Piston ring |
EP4194665A1 (en) * | 2021-09-29 | 2023-06-14 | Doosan Enerbility Co., Ltd. | Sealing assembly and turbomachine including same |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015123739A1 (pt) * | 2014-02-24 | 2015-08-27 | Guarany Ind. Com. Ltda | Aperfeiçoamento introduzido em pistão de sistema de pressuriza ão manual para pulverizador |
JP6062382B2 (ja) * | 2014-02-25 | 2017-01-18 | 三菱重工業株式会社 | ピストンリング及び該ピストンリングを備えるエンジン |
DK178468B1 (en) * | 2014-09-19 | 2016-04-11 | Man Diesel & Turbo Deutschland | A top piston ring for a large two-stroke turbo-charged uniflow-scavenged internal combustion engine with crossheads |
CN106122351A (zh) * | 2016-08-04 | 2016-11-16 | 泰州市易通车件有限公司 | 一种强密封车用减震交错型活塞环 |
JP2017198343A (ja) * | 2017-06-27 | 2017-11-02 | 株式会社リケン | ピストンリング |
CN109268166B (zh) * | 2018-08-23 | 2020-06-23 | 贵州吉利发动机有限公司 | 一种活塞环 |
JP7127560B2 (ja) * | 2019-01-30 | 2022-08-30 | 株式会社デンソー | バタフライバルブ |
US11674595B2 (en) | 2020-12-14 | 2023-06-13 | Caterpillar Inc. | Scraper ring for a piston |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6114747U (ja) * | 1984-06-29 | 1986-01-28 | 富士重工業株式会社 | 内燃機関のピストンリング |
JPH07332496A (ja) * | 1994-06-08 | 1995-12-22 | Toyota Motor Corp | 内燃機関のピストンリング |
JPH10274331A (ja) * | 1997-03-31 | 1998-10-13 | Kanai Hiroaki | ピストンリング |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK171422B1 (da) * | 1992-11-23 | 1996-10-21 | Man B & W Diesel Gmbh | Stempeltopring til en forbrændingsmotor |
JPH06281004A (ja) * | 1993-03-30 | 1994-10-07 | Nippon Piston Ring Co Ltd | 圧力リング |
KR0182814B1 (ko) * | 1994-02-24 | 1999-04-15 | 찌바 고우 | 내연기관용 압축링 |
CN2227235Y (zh) * | 1995-07-25 | 1996-05-15 | 刘志高 | 斜搭***塞环 |
SE9704581L (sv) * | 1997-12-09 | 1999-04-19 | Daros Holding Ab | Anordning vid kolvringar |
JP4104774B2 (ja) * | 1999-03-25 | 2008-06-18 | 日本ピストンリング株式会社 | 2ピース型組合せオイルリング |
CN2396194Y (zh) * | 1999-11-18 | 2000-09-13 | 党新胜 | 镀铬封***塞环 |
DK1655522T3 (da) * | 2004-11-05 | 2008-10-13 | Waertsilae Nsd Schweiz Ag | Stempelring |
US20080252019A1 (en) * | 2005-12-25 | 2008-10-16 | Xiuming Yu | Oil sealing ring |
JP5101827B2 (ja) * | 2006-03-10 | 2012-12-19 | Ntn株式会社 | シールリング |
-
2011
- 2011-02-28 JP JP2011043268A patent/JP5781332B2/ja active Active
-
2012
- 2012-02-27 WO PCT/JP2012/054697 patent/WO2012117987A1/ja active Application Filing
- 2012-02-27 KR KR1020137002647A patent/KR101545790B1/ko active IP Right Grant
- 2012-02-27 KR KR20157004745A patent/KR20150032594A/ko active Search and Examination
- 2012-02-27 CN CN201280002290.2A patent/CN103052833B/zh active Active
- 2012-02-27 CN CN201510408044.2A patent/CN105020047B/zh active Active
- 2012-02-27 KR KR1020157032682A patent/KR101680510B1/ko active IP Right Grant
- 2012-02-27 KR KR1020167009166A patent/KR101727869B1/ko active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6114747U (ja) * | 1984-06-29 | 1986-01-28 | 富士重工業株式会社 | 内燃機関のピストンリング |
JPH07332496A (ja) * | 1994-06-08 | 1995-12-22 | Toyota Motor Corp | 内燃機関のピストンリング |
JPH10274331A (ja) * | 1997-03-31 | 1998-10-13 | Kanai Hiroaki | ピストンリング |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3889471A1 (en) * | 2020-04-02 | 2021-10-06 | Winterthur Gas & Diesel Ltd. | Piston ring |
EP4194665A1 (en) * | 2021-09-29 | 2023-06-14 | Doosan Enerbility Co., Ltd. | Sealing assembly and turbomachine including same |
US11913339B2 (en) | 2021-09-29 | 2024-02-27 | Doosan Enerbility Co., Ltd. | Sealing assembly and turbomachine including same |
Also Published As
Publication number | Publication date |
---|---|
JP5781332B2 (ja) | 2015-09-24 |
KR101727869B1 (ko) | 2017-04-17 |
CN103052833A (zh) | 2013-04-17 |
JP2012180878A (ja) | 2012-09-20 |
CN105020047B (zh) | 2018-01-19 |
KR101680510B1 (ko) | 2016-11-28 |
KR20150133301A (ko) | 2015-11-27 |
KR20150032594A (ko) | 2015-03-26 |
CN103052833B (zh) | 2016-01-06 |
CN105020047A (zh) | 2015-11-04 |
KR20130032381A (ko) | 2013-04-01 |
KR101545790B1 (ko) | 2015-08-19 |
KR20160043150A (ko) | 2016-04-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2012117987A1 (ja) | ピストンリング | |
JP6276497B2 (ja) | エンジンのシリンダ用インサート | |
US20110114054A1 (en) | Single Piece Piston Body For An Internal Combustion Engine | |
WO2017099045A1 (ja) | バルブステムシール | |
JP2018525562A (ja) | 内燃機関用のピストン | |
KR101823807B1 (ko) | 피스톤 링 및 그 피스톤 링을 구비하는 엔진 | |
JP5940642B2 (ja) | ピストンリング | |
KR101465373B1 (ko) | 내연 기관의 냉각 구조 | |
JP6389865B2 (ja) | 内燃機関用ピストン | |
JP2015072071A5 (ja) | ||
CN107701327B (zh) | 活塞环 | |
WO2019203358A1 (ja) | ピストンリング | |
JP2001289117A (ja) | 内燃機関用ピストン | |
JP6015185B2 (ja) | 内燃機関のピストン構造 | |
JPH09203463A (ja) | ピストンリング | |
JP2008240718A (ja) | 二サイクル内燃機関におけるピストンの構造 | |
JP2014020282A (ja) | 内燃機関のピストン構造 | |
WO2019181163A1 (ja) | 内燃機関のピストン及びその製造方法 | |
JPH08303298A (ja) | 組合せリングおよびそれを装着したシール構造 | |
JP2015183822A (ja) | ピストンリング及び該ピストンリングを備えるエンジン | |
JPS6315649Y2 (ja) | ||
JP2021042751A (ja) | 内燃機関のピストン | |
JP2000154872A (ja) | 圧力リング | |
JP2012241861A (ja) | オイルリング及び内燃機関 | |
JP2007224880A (ja) | 二サイクル内燃機関における鋳造製シリンダブロック |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201280002290.2 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12752398 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20137002647 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 12752398 Country of ref document: EP Kind code of ref document: A1 |