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Connecting rod and crosshead engine including the connecting rod

A cross-head type, connecting rod technology, applied in the direction of engine components, machine/engine, engine lubrication, etc., can solve the problems of uneven wear, damage to the durability and reliability of the cross-head type engine EG, and achieve pressure suppression. Deformation, damage suppression, and durability improvement effects

Inactive Publication Date: 2020-06-09
MITSUBISHI HEAVY IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, damage such as uneven wear may occur on the sliding surface 11a of the bearing alloy 11, thereby impairing the durability and reliability of the crosshead engine EG.

Method used

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  • Connecting rod and crosshead engine including the connecting rod
  • Connecting rod and crosshead engine including the connecting rod
  • Connecting rod and crosshead engine including the connecting rod

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0051] First, refer to figure 1 (a), figure 1 (b) The connecting rod according to the first embodiment of the present invention will be described. Connecting rod 18 shown here and Figure 8 , Figure 9 The shown existing connecting rod 8 also includes a small end portion 8A, and a cover (not shown) is mounted on the small end portion 8A (refer to Image 6 symbol 81), mounted on the piston side of the cross head journal (cross head journal) (refer to Image 6 The symbol 7) is held to be freely rotatable. A half-open cylindrical bearing alloy 11 is installed on the bearing surface 8a (in figure 1 (a) is omitted).

[0052] An oil supply passage 15 is formed inside the connecting rod 18, and an oil supply groove 16 extending in the circumferential direction is formed on the bearing surface 8a (in this embodiment, there are three on one side across the central line C of the connecting rod 18, A total of six). The oil supply passage 15 includes: a circular hole-shaped large...

no. 2 approach

[0067] Next, refer to figure 2 (a), figure 2 (b) The connecting rod according to the second embodiment of the present invention will be described. In this connecting rod 28, the oil supply passage 15 also includes: a circular hole-shaped large-diameter portion 15a extending in the lengthwise direction inside the connecting rod 28; and a plurality of small-diameter portions 15b. Each small-diameter portion 15b branches from the end of the large-diameter portion 15a to communicate with the bearing surface 8a, and the respective tip portions of each small-diameter portion 15b form an opening 15c on the bearing surface 8a. Such as figure 2 As shown in (a), three small-diameter portions 15 b are formed on one side across the center line C of the connecting rod 18 , and a total of six small-diameter portions 15 b are formed. Such as figure 2 As shown in (b), as in the case of the first embodiment, the above-mentioned two groups of small-diameter parts 15b branched into a V-s...

no. 3 approach

[0072] Next, refer to image 3 (a), image 3 (b) The connecting rod according to the third embodiment of the present invention will be described. Two circular hole-shaped oil supply passages 15A, 15B are formed in parallel inside the connecting rod 38, and the openings 15c of the two oil supply passages 15A, 15B communicate with different parts of the bearing surface 8a. Specifically, the two openings 15c are located at positions separated from each other in the circumferential direction of the bearing surface 8a with the centerline C of the connecting rod 8 interposed therebetween, and are arranged in a position relative to the pressure so as to sandwich the pressure range R of the bearing surface 8a. The range R is located on the outside in the circumferential direction.

[0073] The oil supply grooves 16 formed on the bearing surface 8 a (in the present embodiment, three on one side, six in total across the center line of the connecting rod 18 ) are formed outside the pre...

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Abstract

A connecting rod (18) connects a cross-head journal (7) and a crank pin (9) of a cross-head type engine (EG), and the connecting rod comprises: an oil supply path (15) that is formed extending along the longitudinal direction of the inside of the connecting rod and that joins a bearing surface (8a) of an end section (8A); an oil supply groove (16) that is formed extending along the circumferential direction of the bearing surface (8a) and that joins an opening (15c) at which the oil supply path (15) opens on the bearing surface (8a); and a bearing metal (11) which is attached to the bearing surface (8a) and which has a half-cylindrical shape. The location of the opening (15c) of the oil supply path (15) is at a location, on the bearing surface (8a), which is circumferentially outward in a range of pressure action (R) in which pressure from the cross-head journal (7) acts with the greatest force. The oil supply groove (16) is not formed within such range of pressure action (R).

Description

technical field [0001] The present invention relates to a connecting rod used in a crosshead engine mounted mainly as a main engine of a ship, and a crosshead engine including the connecting rod. Background technique [0002] Image 6 It is a longitudinal sectional view of a crosshead engine for ships. Figure 7 is along Image 6 A sectional view of line VII-VII, Figure 8 yes Figure 7 A top view of the VIII-VIII direction, Figure 9 is along Figure 7 A longitudinal sectional view of line IX-IX. [0003] In this crosshead type engine EG, the piston 2 is slidably inserted into the cylinder liner 1 extending in the vertical direction, the crankshaft 3 is supported on the axis extension line of the cylinder liner 1, and the crosshead 5 is provided on the cylinder liner 1 so as to be slidable up and down. Between a pair of sliding plates 4 , the pair of sliding plates 4 are arranged between the cylinder liner 1 and the crankshaft 3 . [0004] The crosshead 5 is connected...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C7/02F01M1/06F16C9/04
CPCF01M1/06F16C7/02F16C9/04
Inventor 西田英朗鴫原拓造
Owner MITSUBISHI HEAVY IND LTD