Piston ring
A technology of piston rings and convex parts, applied in the field of piston rings, can solve the problems of disappearance of combustion gas, broken piston top ring, scratched cylinder liner, etc., and achieve the effect of reducing load and reducing wear
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no. 1 approach 〕
[0075] Below, refer to Figure 1 to Figure 3 , Figure 26 and Figure 27 , the piston ring according to the first embodiment of the present invention will be described.
[0076] figure 1 It is a perspective view of the piston ring of this embodiment, figure 2 will be figure 1 The enlarged representation of the part surrounded by double-dot dash line, image 3 yes figure 2 A-A sectional view, Figure 26 It is a schematic sectional view around the combustion chamber of a large two-stroke diesel engine for ships (hereinafter referred to as "diesel engine 1"), Figure 27 It is a partial sectional view of the vicinity of the piston ring assembly.
[0077] exist Figure 26 or Figure 27 In the piston 2 , one piston ring 6 , 7 , 8 is inserted into a plurality of (three in this embodiment) ring grooves 3 , 4 , 5 formed along the height direction, respectively. Further, in the piston 2, the outer peripheral surfaces 6a, 7a, 8a of the piston rings 6, 7, 8 are in sliding c...
no. 2 approach 〕
[0099] refer to Figure 4 , a piston ring according to a second embodiment of the present invention will be described. Figure 4 It is an enlarged perspective view showing the main part of the piston ring of this embodiment, and is the same as image 3 same graph.
[0100] The piston ring 61 of this embodiment differs from the above-mentioned first embodiment in that gas passages (communication passages) 62 and 63 are provided instead of the gap g. The other constituent elements are the same as those of the above-mentioned first embodiment, and therefore descriptions of these constituent elements are omitted here.
[0101] In addition, the same code|symbol is attached|subjected to the same member as 1st Embodiment mentioned above.
[0102] The gas passage 62 is formed in a cross-sectional rectangular shape (first) that is engraved toward the side (upper surface: top surface) 41c side of the piston ring main body 41 along the circumferential direction at the central portion of...
no. 3 approach 〕
[0109] refer to Figure 5 , a piston ring according to a third embodiment of the present invention will be described. Figure 5 It is a perspective view showing an enlarged main part of the piston ring of this embodiment, and is the same as image 3 same graph.
[0110] The piston ring 66 of the present embodiment differs from 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 . The other constituent elements are the same as those in the above-mentioned embodiment, and therefore descriptions of these constituent elements are omitted here.
[0111] In addition, the same code|symbol is attached|subjected to the same member as the above-mentioned embodiment.
[0112] The gas passage 67 is a (second) circumferential groove in a cross-sectional rectangular shape that is engraved toward the side (lower surface: bottom surface) 36 side along the circumferential di...
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