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Jacket for internal combustion engine

A technology for internal combustion engines and cylinder liners, applied in the field of cylinder liners, can solve the problems of increased welding hours, long construction period, and increased manufacturing costs

Active Publication Date: 2015-07-15
MITSUBISHI HEAVY IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there are problems such as increased welding man-hours, prolonged construction period required for manufacturing, and increased manufacturing costs.
In addition, the load applied to the tie bolt acts on the welded part of the sheet metal that accommodates the tie bolt, and cracks may occur in the welded part.

Method used

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  • Jacket for internal combustion engine
  • Jacket for internal combustion engine
  • Jacket for internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0129] Below, according to Figure 1 to Figure 4 A cylinder liner according to a first embodiment of the present invention will be described. figure 1 It is a longitudinal sectional view showing a structural example of a large diesel engine such as a ship having a cylinder liner of the present invention, figure 2 is an enlarged cross-sectional view showing a main part of the cylinder liner of the present embodiment, image 3 will be figure 2 The upper part of the diagram is enlarged, Figure 4 will be figure 2 The lower part of the diagram is shown enlarged.

[0130] like figure 1 As shown, the large diesel engine (crosshead diesel engine) E is roughly divided into three parts. The first part is the cylinder liner (cylinder block: cylinder frame) 1 that houses the cylinder 2 and the piston 3, and the second part is the frame 6 that houses the connecting rod 7 that moves the piston 3 through the The power generated by the explosion is transmitted to the crankshaft 8, an...

no. 2 approach

[0141] Now refer to Figure 5 A second embodiment of the cylinder liner of the present invention will be described. Figure 5 is an enlarged cross-sectional view showing the main part of the cylinder liner of this embodiment, that is, it is the same as image 3 same diagram.

[0142] The cylinder liner 21 of the present embodiment differs from the above-mentioned first embodiment in that it has: a pipe 14 having a flange portion 22 instead of the flange portion 15; and a top plate 11 having a concave portion 23 instead. Recess 16. The other structural elements are the same as those of the above-mentioned first embodiment, so descriptions of these structural elements are omitted here.

[0143] In addition, the same code|symbol is attached|subjected to the same component as the said 1st Embodiment.

[0144] The flange portion 22 has an outer diameter larger than that of the flange portion 15, and a plurality of (four in this embodiment) through-holes 22a are provided on the ...

no. 3 approach

[0153] Now refer to Image 6 Next, a third embodiment of the cylinder liner of the present invention will be described. Image 6 It is an enlarged cross-sectional view showing the main part of the cylinder liner of this embodiment, that is, it is the same as image 3 same diagram.

[0154] The cylinder liner 31 of the present embodiment differs from the above-mentioned first embodiment in that it has: a pipe 14 having a flange portion 32 instead of the flange portion 15; and a top plate 11 having a concave portion 33 instead. Recess 16. The other structural elements are the same as those of the above-mentioned first embodiment, so descriptions of these structural elements are omitted here.

[0155] In addition, the same code|symbol is attached|subjected to the same component as the said 1st Embodiment.

[0156] The flange portion 32 has an outer diameter larger than the outer diameter of the flange portion 15, and at least one (one in this embodiment) through-hole 32a is p...

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Abstract

A jacket (1) for an internal combustion engine, the jacket (1) being introduced with scavenging to the interior thereof and being provided with a tie bolt housing pipe (14) for housing a tie bolt (10) inserted into a first through-hole (11a) and a second through-hole (12a), wherein: the air tightness of the first through-hole (11a) is ensured by means of a metal touch located at the bottom surface of a flanged section disposed on the upper end of the tie bolt housing pipe (14) and at the bottom surface of a concaved section which receives the flanged section, or by means of an O-ring disposed between the flanged section and the concaved section; and the air tightness of the second through-hole (12a) is ensured by means of an O-ring disposed between the second through hole (12a) and the bottom end of the tie bolt housing pipe (14).

Description

technical field [0001] The invention relates to a cylinder liner constituting a large diesel engine such as a ship. Background technique [0002] Cylinder liners constituting large diesel engines such as those used in ships have conventionally been designed and manufactured using casting structures. However, in recent years, attempts have been made to use sheet metal structures (steel plate welded structures) from the viewpoint of increasing the size and weight of the entire engine. Design and manufacture (for example, refer to Non-Patent Document 1). [0003] Non-Patent Document 1: Takashi Kuwata, 5 others [Latest Technology Trends of Mitsui-MAN B&W Low-Speed ​​Diesel Engines], Mitsui Zosen Technical Bulletin, No.191(2007-6), p3-9 [0004] The problem to be solved by the invention [0005] However, in the structure disclosed in the above-mentioned technical report, in order to ensure the airtightness in the cylinder liner, the ends of the three sheet metals (steel plates)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F1/00F02F1/10F02F11/00
CPCF02F7/00F02F1/004F02F1/22F02F1/00F02F1/10F02F11/00
Inventor 门胁刚国弘信幸
Owner MITSUBISHI HEAVY IND LTD