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Flywheels and marine diesel engines

A diesel engine and flywheel technology, applied to flywheels, mechanical equipment, engine components, etc., can solve the problems of increased crankshaft deflection, larger and larger flywheel body length, etc., and achieve the effect of increased deflection

Active Publication Date: 2017-10-24
MITSUBISHI HEAVY IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the overall length of the flywheel body becomes larger, and as a result, the engine room for installing the engine needs to be enlarged.
[0007] In addition, Patent Document 1 does not consider the positional relationship between the flywheel body and the engine body and the direction in which the balance weights are stacked.
When the distance between the flywheel body and the engine body is large, or when the balance weight is stacked in the direction opposite to the engine body side, the amount of deflection of the crankshaft provided on the engine body becomes large, so the The main bearing is not in full contact and becomes the cause of damage
On the other hand, when the distance between the flywheel body and the engine body is short, or when the balance weight is stacked on the side of the engine body, the maintenance space between the engine body and the flywheel body cannot be ensured. For maintenance, it is necessary to remove the flywheel itself, etc.

Method used

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  • Flywheels and marine diesel engines
  • Flywheels and marine diesel engines
  • Flywheels and marine diesel engines

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach ＞

[0077] Hereinafter, an engine according to a first embodiment of the present invention will be described with reference to the drawings. The engine 1 is, for example, a marine diesel engine, which is disposed inside the hull of the ship, such as figure 1 As shown, there is a crankshaft 2 and an engine body 3 . The crankshaft 2 has a pin portion connected to one end of a connecting rod, a journal portion supported by the pin portion and arranged on the axis 10 , and an arm portion connecting the pin portion and the journal portion.

[0078] The engine main body 3 has a frame 6 and a main bearing 7 . The machine base 6 is fixed to the hull, and a storage space 8 is formed inside. The pin portion and the arm portion of the crankshaft 2 are housed in the housing space 8 inside the engine body 3 , and both ends are arranged outside the housing space 8 . The main bearings 7 are respectively arranged in the storage spaces 8 , and the crankshaft 2 is rotatable about the axis 10 . ...

no. 2 Embodiment approach ＞

[0104] Next, a flywheel according to a second embodiment of the present invention will be described.

[0105] The flywheel 51 of the present embodiment is applicable to, for example, a flywheel provided on the front end side. like Figure 4 As shown, the flywheel 51 is formed in a disk shape and has a main body 52 , a split member 53 and a plurality of bolts 54 . The main body portion 52 is fixed to the crankshaft 2 and has a mounting surface 52a including a radial direction of a disk forming the flywheel 51 . The dividing member 53 is formed in a semicircular plate shape. The flywheel 51 is formed by attaching the divided member 53 to the attaching surface 52 a of the main body 52 . When attached to the main body 52 , the split member 53 forms a part of the side surface of the flywheel 51 (the side surface of the disk) and also forms a part of the engine body side surface (the bottom surface of the disk) of the flywheel 51 facing the engine body 3 .

[0106] The plurality...

no. 3 Embodiment approach ＞

[0110] Next, a flywheel according to a third embodiment of the present invention will be described.

[0111] The flywheel 61 of the present embodiment is applicable to, for example, a flywheel provided on the front end side. like Figure 5 As shown, the flywheel 61 is formed in a disc shape and has a main body 62 , a split member 63 and a plurality of bolts 64 . In addition, the flywheel 61 only needs to be in the shape of a disc, and does not necessarily have to be a perfect circle. The main body 62 is fixed to the crankshaft 2, and has a mounting surface 62a formed on a chord corresponding to a center angle of the flywheel 61 which is less than 180 degrees. When viewed from the front, the split member 63 has a shape surrounded by an arc corresponding to a central angle of less than 180 degrees and a chord corresponding to the central angle of the arc. The flywheel 61 is formed by attaching the divided member 63 to the attaching surface 62 a of the main body 62 . When attac...

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Abstract

This engine is provided with: a crankshaft that rotates centered around an axis line; and a flywheel (16) having a circular plate shape and connected to the axis line of the crankshaft at the center thereof. The flywheel (16) has: a main body (27) affixed to the crankshaft; and a first split member (28) and second split member (29) that are removably affixed to the main body (27). When the first split member (28) and second split member (29) are affixed to the main body (27), a portion of the side surface of the flywheel (16) and a portion of the bottom surface facing an engine main body of the two circular bottom surfaces of the flywheel (16) are formed.

Description

technical field [0001] The present invention relates to a flywheel and a marine diesel engine. Background technique [0002] The crankshaft of the engine is supported by the frame of the engine main body via the main bearing, and the flywheel is attached to the front end side or the rear end side of the crankshaft. The flywheel smoothly rotates the crankshaft by absorbing excess energy in the combustion stroke and using the energy of the flywheel's rotational inertial force in other strokes. Patent Document 1 below discloses an invention related to a flywheel which includes a balance weight detachably attached to a flywheel body and freely adjusts the moment of inertia. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Publication No. 63-118442 [0006] The flywheel body of Patent Document 1 is designed so that the inertial force can be changed by stacking the balance weight on the outer shell portion of the flywheel body. When...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F15/30F02B61/00F02B61/06F02B77/00F16F15/31F16C3/08
CPCF02B61/04F16C3/08F16F15/30F16F15/31F16F2230/32
Inventor 吉川秀一细川直史石原慎也
Owner MITSUBISHI HEAVY IND LTD