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Crosshead bearing, crosshead, frame, and crosshead internal combustion engine

A technology of crossheads and crosshead pins, which is applied to bearings, connecting rod bearings, bearing components, etc., can solve the problem of oil film damage and achieve the effect of inhibiting damage

Pending Publication Date: 2019-11-12
MITSUBISHI HEAVY IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the crosshead bearing may damage the axial central part where the oil film pressure is the largest

Method used

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  • Crosshead bearing, crosshead, frame, and crosshead internal combustion engine
  • Crosshead bearing, crosshead, frame, and crosshead internal combustion engine
  • Crosshead bearing, crosshead, frame, and crosshead internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0056] figure 1 It is a schematic diagram showing the diesel engine of the first embodiment.

[0057] In the first embodiment, if figure 1 As shown, the diesel engine 10 is, for example, a two-stroke, one-cycle single-flow scavenging type crosshead internal combustion engine used as a main engine for propulsion of a ship. The diesel engine 10 has a base plate 11 located below, a frame 12 provided on the base plate 11 , and a cylinder cover 13 provided on the frame 12 . The base plate 11 , the frame 12 and the cylinder cover 13 are integrally fastened and fixed by a plurality of tie bolts (connection members) 14 and nuts 15 extending in the vertical direction.

[0058] The cylinder liner 16 is disposed in the cylinder cover 13 , and a space portion is defined by fixing the cylinder head 17 at the upper portion thereof, and the piston 18 is provided in the space portion so as to be able to reciprocate up and down. In addition, the cylinder head 17 is provided with an exhaust ...

no. 2 approach

[0106] Figure 14 It is a plan view showing the crosshead of the second embodiment, Figure 15 yes Figure 14 XV-XV sectional view. In addition, the same code|symbol is attached|subjected to the component which has the same function as the above-mentioned embodiment, and detailed description is abbreviate|omitted.

[0107] In the crosshead of the second embodiment, as Figure 14 and Figure 15 As shown, a bearing (crosshead bearing) 101 includes a bearing main body 71 , a bearing surface 72 , an axial oil groove 74 , a slit opening (communicating portion) 102 , and an inclined groove (inclined portion) 103 .

[0108] The bearing shell 101 is provided with a plurality of axial oil grooves 74 at predetermined intervals in the circumferential direction C along the axial direction A on the bearing surface 72 . The bearing bush 101 is formed along the circumferential direction C with a slit opening 102 penetrating in the thickness direction. Lengthwise ends of the plurality o...

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PUM

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Abstract

Provided are a crosshead bearing, a crosshead, a frame, and a crosshead internal combustion engine. The present invention comprises: a semi-circular cylindrical bearing body (71); a bearing surface (72) provided on the inner surface of the bearing body (71); a communication hole (75) as a communication section, the communication hole (75) extending through the bearing body (71) in the thickness direction thereof; and a tilted groove (76) as a sloped section, the tilted groove (76) being formed in the inner surface of the bearing body (71) and having a depth increasing from the opposite axial ends of the bearing body (71) toward the center thereof.

Description

technical field [0001] The present invention relates to a crosshead bearing used in a crosshead internal combustion engine constituting an internal combustion engine such as a diesel engine or a gas engine, a crosshead provided with the crosshead bearing, a frame provided with the crosshead, and a crosshead internal combustion engine provided with the frame. Background technique [0002] For example, as a main engine for ship propulsion, there is a two-stroke one-cycle single-flow scavenging type crosshead internal combustion engine. This crosshead internal combustion engine includes a crosshead bearing device for converting reciprocating motion of a piston into rotational motion of a crankshaft. The crosshead bearing device includes a connecting rod and a bearing shell. The lower end of the connecting rod is connected to the crank, and the upper end of the connecting rod is provided with a semicircular bearing surface, and the bearing bush is in the shape of a semicylindri...

Claims

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Application Information

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IPC IPC(8): F16C9/04F02B75/32F02F1/00F02F7/00F16C17/02F16C33/10
CPCF02B75/32F02F1/00F02F7/00F16C9/04F16C17/02F16C33/10F02F1/10F02F7/0004F16C33/107
Inventor 永嶋启浩江户浩二
Owner MITSUBISHI HEAVY IND LTD
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