KR102146229B1 - Cylinder jacket and crosshead internal combustion engine - Google Patents

Abstract

In a cylinder jacket and a crosshead type internal combustion engine, a top plate 51 having a first through hole 55 penetrating in the plate thickness direction is formed, and the first through hole 55 penetrates in the plate thickness direction. The bottom plate 52 in which the second through hole 56 is formed toward the top, the side plate 53 connecting the top plate 51 and the bottom plate 52, the first through hole 55 and the second through hole ( A mounting hole 59 through which a plurality of tie bolts 14 are inserted is formed while passing along the penetrating direction in 56).

Description

Cylinder jacket and crosshead internal combustion engine

The present invention relates to a cylinder jacket constituting an internal combustion engine such as a diesel engine or a gas engine, and to a crosshead type internal combustion engine provided with the cylinder jacket.

In general, in an internal combustion engine such as a gas engine or a gasoline engine that generates power by burning fuel in a cylinder, a crankshaft is disposed below a plurality of cylinders along the cylinder arrangement direction. The crankshaft is connected to a piston, and is supported so that it can rotate freely to the crankcase through a bearing. On the other hand, in an internal combustion engine having a large bore stroke ratio mounted on a large ship, a crosshead is formed between the piston and the crankshaft. In the crosshead type internal combustion engine, furniture is disposed on a base plate in which a crankshaft is accommodated, a cylinder jacket is disposed on the furniture, and is integrally connected by a plurality of tie bolts.

The cylinder jacket, the furniture, and the base plate are arranged along the piston axial direction, and a plurality of tie bolts are fixed to penetrate both sides of the partition wall in the furniture vertically so as to come between the partition walls in the crankshaft axial direction. As such a crosshead type internal combustion engine, there exists what was described in following patent document 1, for example.

Japanese Unexamined Patent Publication No. 2012-097717

As described above, in the crosshead type internal combustion engine, the cylinder jacket, furniture, and base plate are arranged along the piston axial direction, and through holes for penetrating the tie bolts in the piston axial direction are formed. In this case, in the furniture, a pair of through holes are formed on both sides of the partition wall so as to pinch the partition wall in the crankshaft axis direction, so that the cylinder jacket also has a pair of through holes at the same position. By the way, since a pair of through-holes formed in the cylinder jacket suppresses a decrease in the rigidity of the periphery, they cannot be disposed in close proximity.

An object of the present invention is to solve the above-described problems, and to provide a cylinder jacket and a crosshead type internal combustion engine which are designed to reduce the size and weight while suppressing the decrease in rigidity around the through hole.

The cylinder jacket of the present invention for achieving the above object includes a top plate having a first penetrating portion penetrating in the plate thickness direction, and a second penetrating portion facing the first penetrating portion while penetrating in the plate thickness direction. A bottom plate that connects the top plate to the bottom plate, and penetrates along the penetration direction of the first through portion and the second through portion, and a side plate having a mounting hole through which a plurality of connection members are inserted It is characterized in that it comprises a.

Therefore, by forming a mounting hole through which a plurality of connection members can be inserted through each penetrating portion through the penetration direction, a plurality of connection members can be disposed closer to each other than when the mounting hole is formed for each of the plurality of connection members. , By shortening the length of the cylinder jacket, it is possible to reduce the size and weight.

In the cylinder jacket of the present invention, the mounting hole is characterized in that it has a long hole shape.

Therefore, by making the mounting hole into an elongated hole shape, a plurality of connecting members can be efficiently arranged, and the opening area of the mounting hole can be reduced to suppress a decrease in rigidity.

In the cylinder jacket of the present invention, the mounting holes are formed on both sides of the first through portion and the second through portion in the width direction.

Therefore, by forming the mounting holes on both sides of each penetrating portion, it is possible to fasten the cylinder jacket with good balance.

In addition, the crosshead type internal combustion engine of the present invention passes through the base plate, the furniture formed on the base plate, the cylinder jacket formed on the furniture, the base plate and the furniture, and the cylinder jacket It is characterized in that it comprises a plurality of connecting members for connecting the base plate and the furniture and the cylinder jacket through the mounting hole.

Accordingly, the plurality of connecting members are fixed through the mounting hole of the cylinder jacket, the base plate, and the furniture, so that the cylinder jacket, the base plate, and the furniture are integrally fastened. At this time, when a plurality of connecting members are inserted through one mounting hole, a plurality of connecting members can be arranged close to each other, and the length of the internal combustion engine can be shortened, thereby reducing size and weight.

In the crosshead type internal combustion engine of the present invention, the plurality of connecting members penetrate the through hole of the furniture, one end is screwed to the base plate and fixed, the other end is inserted into the mounting hole, and the It is characterized in that the nut is screwed and fastened through the washer disposed at the end of the mounting hole.

Accordingly, the plurality of connection members are fixed by screwing one end to the base plate, and the other end is screwed and fastened by a nut through a washer in the mounting hole, so that the cylinder jacket and the base plate and the plurality of connection members, washers and nuts Furniture is properly fastened in a compressed state, and high fastening force can be secured.

In the crosshead type internal combustion engine of the present invention, the hardness of the washer is a material that is higher than that of the cylinder jacket.

Therefore, by making the hardness of the washer a material higher than that of the cylinder jacket, the washers with high hardness come into contact with the cylinder jacket with high surface pressure due to the fastening force of the plurality of connecting members and nuts, and thus the cylinder jacket, the base plate and the furniture It can be tightened properly.

According to the cylinder jacket and crosshead type internal combustion engine of the present invention, since a mounting hole through which a plurality of connecting members are inserted into the cylinder jacket is formed, the length of the cylinder jacket can be shortened by arranging the plurality of connecting members in close proximity. , Small size and weight reduction can be achieved.

1 is a schematic configuration diagram showing a diesel engine of the present embodiment.
2 is a perspective view showing the cylinder jacket of the present embodiment.
3 is a perspective view showing furniture.
4 is a perspective view showing a base plate.
5 is a plan view showing a fixed portion of the cylinder jacket.
6 is a longitudinal sectional view showing a fixing portion of the cylinder jacket.
Fig. 7 is a longitudinal sectional view showing a connection part between a cylinder jacket and furniture.
Fig. 8 is a longitudinal sectional view showing a connection part between furniture and a base plate.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the cylinder jacket and crosshead type internal combustion engine according to the present invention will be described in detail. In addition, the present invention is not limited by this embodiment, and when there are multiple embodiments, a combination of each embodiment is also included.

1 is a schematic diagram showing the diesel engine of the present embodiment.

In this embodiment, as shown in FIG. 1, the diesel engine 10 is used as a cycle for ship propulsion, for example, and is a crosshead type internal combustion engine of the uniflow scavenging system of 2 strokes and 1 cycle. This diesel engine 10 includes a base plate 11 positioned below, a furniture 12 formed on the base plate 11, and a cylinder jacket 13 formed on the furniture 12. The base plate 11, the furniture 12, and the cylinder jacket 13 are integrally fastened and fixed by a plurality of tie bolts (connection members) 14 and nuts 15 extending in the piston axial direction.

The cylinder liner 16 is disposed in the cylinder jacket 13, and the cylinder cover 17 is fixed at the top to partition the space, and the piston 18 is formed so that the piston 18 can freely reciprocate with the piston shaft in the space. As a result, the combustion chamber 19 is formed. In addition, the cylinder cover 17 is provided with an exhaust valve 20, and the exhaust valve 20 can be opened and closed by a valve device 21. This exhaust valve 20 opens and closes the combustion chamber 19 and the exhaust pipe 22.

Therefore, for the combustion chamber 19, the fuel supplied from a fuel injection pump (not shown, for example, low quality oil, natural gas, or a mixed fuel thereof) and for combustion compressed by a compressor (not shown) When a gas (for example, air, EGR gas, or a mixed gas thereof) is supplied, the fuel and the combustion gas are combusted in the combustion chamber 19. And the piston 18 reciprocates by the energy generated by this combustion. At this time, when the exhaust valve 20 is operated by the same valve device 21 to open the combustion chamber 19, the exhaust gas generated by combustion is pushed out to the exhaust pipe 22, while combustion from a scavenging port (not shown) The solvent gas is introduced into the combustion chamber 19.

The piston 18 has an upper end of a piston rod 23 connected to a lower end thereof. The base plate 11 constitutes a crankcase, and is supported so that the crankshaft 24 can freely rotate by a bearing 25. The crankshaft 24 is connected so that the lower end of the connecting rod 27 can rotate freely through the crank 26. The furniture 12 is arranged so that a pair of guide plates 28 formed along the piston axis direction are spaced at predetermined intervals in the width direction, and a crosshead 29 is formed between the pair of guide plates 28 Is supported so that it can move freely along the piston axis direction. The crosshead 29 is connected so that the lower end of the piston rod 23 can rotate freely, and the upper end of the connecting rod 27 can rotate freely.

Therefore, the piston 18 to which energy has been transmitted from the combustion chamber 19 is pressed down together with the piston rod 23 in the piston axial direction (direction of the mounting surface of the diesel engine 10). Then, the piston rod 23 pushes down the crosshead 29 in the same direction, and rotates the crankshaft 24 via the connecting rod 27 and the crank 26.

Here, the base plate 11, the furniture 12, and the cylinder jacket 13 constituting the diesel engine 10 will be described in detail. Fig. 2 is a perspective view showing a cylinder jacket according to the present embodiment, Fig. 3 is a perspective view showing furniture, and Fig. 4 is a perspective view showing a base plate.

As shown in FIG. 2, the base plate 11 includes a bearing base 31, a pair of partition walls 32 in the width direction, a pair of side plates 33 in the width direction, and the width direction And a pair of bottom plates 34 in the width direction and a pair of top plates 35 in the width direction. The bearing stand 31 is connected to the furniture 12, and includes a bearing 25 of the crankshaft 24 (all see Fig. 1) extending in the crankshaft direction X along the piston axial direction Z. Support from below. The pair of partition walls 32 in the width direction are connected to both side portions of the bearing base 31 in the width direction Y along the piston axis direction Z. The pair of side plates 33 in the width direction are connected so as to intersect each of the pair of partition walls 32 in the width direction along the piston axis direction Z. A pair of bottom plates 34 in the width direction are connected to the lower part of the partition wall 32 and the side plate 33 along the horizontal direction. The pair of top plates 35 in the width direction are connected to the upper part of the partition wall 32 and the pair of side plates 33 in the width direction along the horizontal direction. In addition, a pair of partition walls 32 in the width direction may be integrally configured.

In this case, the base plate 11 is configured such that the bearing base 31, the partition wall 32, the side plate 33, the bottom plate 34, and the top plate 35 are integrally fixed by welding. Therefore, the base plate 11 is configured to surround the bearing base 31 fixed to the partition wall 32 by the side plate 33, the bottom plate 34, and the top plate 35. Moreover, the bottom plate 34 has an oil pan 36 connected to the lower part. And the partition wall 32 is arrange|positioned in the direction orthogonal to the crankshaft direction on both sides of the width direction Y of the support plate 11 with respect to the bearing stand 31. The side plates 33 are disposed along the crankshaft direction X on both sides of the base plate 11 in the width direction Y with respect to the partition wall 32 and along a direction orthogonal to the partition wall 32. The bottom plate 34 is disposed at the lower end of the partition wall 32 and the side plate 33 in the piston axial direction Z, and the top plate 35 is a piston in the partition wall 32 and the side plate 33 It is arranged at the upper end in the axial direction (Z).

The bottom plate 34 has an arcuate bent portion 37 that becomes convex toward the crankshaft 24 side. The bent portion 37 of the bottom plate 34 has a horizontal member 37a arranged parallel to the bottom plate 34 and two inclined members 37b. The horizontal member 37a is located below the bearing stand 31, is located above the bottom plate 34, and is connected to the lower portion of the bearing stand 31. Each inclined member 37b is located on both sides of the horizontal member 37a and is connected to the lower part of the side plate 33 in an inclined state so as to connect the bottom plate 34 and the horizontal member 37a to each other. Therefore, in the bent part 37, each inclined member 37b supports the horizontal member 37a from below obliquely in the width direction, and the rigidity in the vicinity of the horizontal member 37a can be improved. In addition, as long as the rigidity of the base plate 11 is sufficiently secured, the bottom plate 34 does not have to be provided with the arcuate bent portion 37, and may be formed of a flat plate.

Further, the lower end of the side plate 33 and the upper surface of the bottom plate 34 are connected by welding, and a vertical rib 38 is welded to the outside of the connecting portion between the side plate 33 and the bottom plate 34. It is fixed. The vertical ribs 38 are provided in a pair on both sides at the same position as the partition wall 32 in the crankshaft direction (X), and increase the rigidity of the lower side of the base plate 11, and the crankshaft direction ( It is possible to suppress the deformation in the perpendicular direction to X). That is, the vertical rib 38 can increase the rigidity of the support plate 11 in the width direction Y, and can suppress the deformation of the support plate 11 in the width direction Y during operation.

In addition, the bearing base 31 has a U-shaped thick portion 39 formed at the upper portion, and the thick portion 39 can support the bearing 25 (see Fig. 1) from below. And this thick portion 39 is formed with a pair of screw holes 40 in the width direction so as to penetrate the top plate 35 and open upward. Two of these screw holes 40 are formed on both sides in the width direction, respectively, and are juxtaposed along the crankshaft direction (X).

As shown in FIG. 3, the furniture 12 includes a pair of top plates 41 in the width direction, a pair of floor plates 42 in the width direction, and a pair of floor plates 42 in the width direction. It is comprised of the side plate 43 and the partition wall unit 44 of a plurality (in this embodiment, seven). A pair of top plates 41 in the width direction are arranged at the top along the horizontal direction, and the cylinder jacket 13 (refer to FIG. 1) is connected. A pair of bottom plates 42 in the width direction are disposed along the horizontal direction to the bottom portion, and the base plate 11 (see Fig. 1) is connected. A pair of side plates 43 in the width direction are disposed on the side portions in the width direction (Y), and one end (lower end) in the piston axis direction (Z) is connected to the bottom plate 42, The other end (upper end) is connected to the top plate 41. The partition wall unit 44 is disposed along the piston axis direction (Z), and is disposed in parallel along the crankshaft direction (X) at regular intervals.

In this case, the furniture 12 is constituted by connecting the top plate 41, the bottom plate 42, and the side plate 43 by welding, and the space portion 45 is formed by each partition wall unit 44. . This space part 45 is a space part in which the crosshead 29 (see FIG. 1) is supported by the guide plate 28 and is movable, and the crosshead 29 is accommodated in this space part 45 , It can reciprocate along the piston axis direction (Z).

The top plate 41 is formed with a pair of through holes 46 in the width direction penetrating in the piston axial direction Z. Two of these through holes 46 are formed on both sides in the width direction, respectively, and are arranged in parallel along the crankshaft direction X. The bottom plate 42 is formed with a pair of through holes 47 in the width direction penetrating in the piston axial direction Z. Two through-holes 47 are formed on both sides in the width direction, respectively, and are arranged in parallel along the crankshaft direction X.

The partition wall unit 44 is constituted by a central plate 48, a pair of intermediate plates 49 in the width direction, and a guide plate 28. The central plate 48 forms a central portion in the width direction Y in the partition wall unit 44, and the pair of intermediate plates 49 in the width direction is in the partition wall unit 44 It forms both end portions in the width direction (Y) of. The guide plate 28 is disposed between the central plate 48 and each intermediate plate 49 in the partition wall unit 44 and is connected by welding.

As shown in FIG. 4, the cylinder jacket 13 is composed of a top plate 51, a bottom plate 52, a pair of side plates 53 in the width direction, and a partition plate 54. . The top plate 51 has a rectangular shape along the horizontal direction, and a plurality of first through holes (first through portions) 55 along the piston axis direction Z are at predetermined intervals in the crankshaft direction (X). In the embodiment, two) are formed. The bottom plate 52 has a square shape along the horizontal direction, and a plurality of second through holes (second through portions) 56 along the piston axis direction Z are at predetermined intervals in the crankshaft direction X ( In this embodiment, two) are formed. The first through hole 55 and the second through hole 56 are opposed to the piston axial direction Z, and the first through hole 55 is fitted with a cylinder liner 16 (see FIG. 1 ), The second through hole 56 is inserted through the piston rod 23 so that it can move freely in the axial direction.

In the pair of side plates 53 in the width direction, one end in the piston axis direction Z is connected to the top plate 51, the other end is connected to the bottom plate 52, and one side plate 53 Silver, a communication hole 57 is formed. The communication hole 57 of one side plate 53 communicates with the intended trunk.

Moreover, a protrusion 58 continuing in the piston axial direction Z is formed at one end of the top plate 51 and the bottom plate 52 in the width direction Y and one side of the side plate 53. And, in each of the protrusions 58, a mounting hole 59 is formed along the piston axis direction Z. Further, a mounting hole 59 is formed along the piston axis direction Z on the other end of the top plate 51 and the bottom plate 52 in the width direction Y and on the other side plate 53 side. The mounting hole 59 at one end of the top plate 51 in the width direction Y and the mounting hole 59 at the other end are opposite to the width direction Y at both sides of the through holes 55 and 56 It is formed in a position to.

In this case, the cylinder jacket 13 is configured by integrally fixing the top plate 51 and the bottom plate 52 and a pair of side plates 53 and partition plates 54 in the width direction by welding. . Therefore, the cylinder jacket 13 is a block body forming a rectangular parallelepiped shape as a whole.

And, as shown in Figs. 1 to 4, the furniture 12 is disposed on the base plate 11, and the cylinder jacket 13 is mounted on the furniture 12, so that the base plate 11 and The furniture 12 and the cylinder jacket 13 are stacked along the piston axis direction Z. In this state, a plurality of tie bolts 14 pass through each of the mounting holes 59 of the cylinder jacket 13 and each of the through holes 46 and 47 of the furniture 12, and each screw hole of the base plate 11 While being screwed to 40, the nut 15 is screwed to the upper end of each tie bolt 14, thereby being fastened. The base plate 11, the furniture 12, and the cylinder jacket 13 are integrally fastened.

In this embodiment, a plurality of tie bolts 14 penetrate through the cylinder jacket 13, the furniture 12 and the base plate 11, but the two adjacent tie bolts 14, with respect to the furniture 12, It is disposed on both sides of the partition wall unit 44 (central plate 48), and penetrates each of the corresponding through holes 46 and 47, respectively. On the other hand, these two adjacent tie bolts 14 are inserted through the cylinder jacket 13 through one mounting hole 59.

Fig. 5 is a plan view showing a fixing part of the cylinder jacket, Fig. 6 is a longitudinal sectional view showing a fixing part of the cylinder jacket, Fig. 7 is a longitudinal sectional view showing a connection part between the cylinder jacket and furniture, and Fig. 8 is a furniture and a base plate. It is a longitudinal sectional view showing the connection part.

As shown in FIG. 8, the two tie bolts 14 disposed on both sides of the partition wall unit 44 (central plate 48) in the furniture 12 have a lower end portion of the floor plate ( Through the through hole 47 formed in 42), the threaded portion 14a formed at this lower end is screwed into the threaded hole 40 formed in the thick portion 39 of the base plate 11.

In addition, two tie bolts 14 disposed on both sides of the partition wall unit 44 (central plate 48) in the furniture 12, as shown in FIG. A shake preventing bush (shake preventing member) 61 is fixed to 14b), and each tie bolt 14 penetrates through the through hole 46 formed in the top plate 41 of the furniture 12, and each small diameter portion The shake prevention bushes 61 fixed to (14b) are each positioned in the through hole 46 with a predetermined gap.

In addition, as shown in Figs. 5 and 6, the two tie bolts 14 disposed on both sides of the partition unit 44 (central plate 48) in the furniture 12 have a cylinder jacket ( It fits into and passes through one mounting hole 59 formed in 13), and the threaded part 14c formed in this upper end protrudes upward. The cylinder jacket 13 has a washer 62 formed on an upper surface portion where each mounting hole 59 is opened, and the two tie bolts 14 have an upper end portion (screw portion 14c), respectively. ), and each nut 15 is screwed to each threaded portion 14c.

That is, the mounting hole 59 formed in the cylinder jacket 13 forms an elongated hole shape in the crankshaft direction X, and the two tie bolts 14 do not contact each other, and the two tie bolts 14 ) Is set to an inner diameter that does not contact the inner surface of the mounting hole 59. The washer 62 forms an elongated hole shape in the crankshaft direction X like the mounting hole 59, but the outer diameter is set to a dimension larger than the inner diameter of the mounting hole 59. The washer 62 has a through hole 63 formed at a position where the two tie bolts 14 do not contact each other. In this case, the cylinder jacket 13 is made of cast iron, and the washer 62 is formed of, for example, rolled steel for general structures so that the hardness is higher than that of the cylinder jacket 13. In addition, the tie bolt 14 has a threaded portion 14c formed at its upper end, penetrated through each through hole 63 formed in the washer 62, and a nut 15 is screwed to each threaded portion 14c. Can be.

In this case, since the plurality of tie bolts 14 are arranged so as not to contact the central plate 48 on both sides of the partition wall unit 44 in the furniture 12, the tie bolts 14 The position of the crankshaft direction (X) is determined. Therefore, when the position of the tie bolt 14 is determined, depending on the position of the tie bolt 14, the formation position of the screw hole 40 in the base plate 11, the through hole in the furniture 12 ( The formation positions of 46 and 47 and the formation positions of the mounting holes 59 in the cylinder jacket 13 are determined.

And when assembling the base plate 11, the furniture 12, and the cylinder jacket 13, as shown in FIG. 1, this base plate 11, the furniture 12, and the cylinder jacket 13 are connected to the piston axial direction (Z ), and the position of the screw hole 40, the through hole 46, 47, and the mounting hole 59 is positioned in a straight line along the piston axis direction (Z). Then, the tie bolt 14 is inserted from the top of the cylinder jacket 13 in the order of the mounting hole 59 and the through holes 46, 47, and as shown in Fig. 8, the threaded portion 14a is inserted into the screw hole ( 40) Screw in. When each tie bolt 14 is screwed to the threaded portion 14a of the base plate 11, each tie bolt 14 itself becomes self-standing, and as shown in Fig. 7, the shake preventing bush 61 in the middle portion is It is arrange|positioned in each through-hole 46 in (12), and as shown in FIG. 5 and FIG. 6, the upper end part protrudes upward from the attachment hole 59 in the cylinder jacket 13.

Here, one washer 62 is inserted into the upper end of each tie bolt 14 protruding upward from the mounting hole 59 in the cylinder jacket 13, and each nut 15 is inserted into each threaded portion 14c. Screw it. Then, by screwing the nut 15 to the threaded portion 14c of the tie bolt 14, the tie bolt 14 has a tensile force acting upward in the axial direction (piston axis direction Z), and thus the cylinder When a compressive force acts on the upper surface of the jacket 13 and the lower surface of the washer 62, the upper surface of the washer 62 and the lower surface of the nut 15, the base plate 11, the furniture 12, and the cylinder jacket 13 It is tightly fastened.

At this time, it is preferable to set the pitch between the adjacent tie bolts 14 so that adjacent nuts 15 do not contact each other. In addition, the contact area between the upper surface of the cylinder jacket 13 and the lower surface of the washer 62 is preferably set to be larger than the contact area between the upper surface of the washer 62 and the lower surface of the nut 15. With this configuration, a large surface pressure is generated between the upper surface of the cylinder jacket 13 and the lower surface of the washer 62, and movement of the washer 62 relative to the cylinder jacket 13 is prevented.

As described above, in the cylinder jacket of this embodiment, the top plate 51 in which the first through hole 55 penetrating in the plate thickness direction is formed, and the first through hole 55 penetrates in the plate thickness direction. The bottom plate 52 in which the second through hole 56 is formed toward the top, the side plate 53 connecting the top plate 51 and the bottom plate 52, the first through hole 55 and the second through hole ( A mounting hole 59 is formed through which a plurality of tie bolts 14 are inserted and penetrated along the penetrating direction in 56).

Therefore, since a plurality of tie bolts 14 are inserted through one mounting hole 59, the plurality of tie bolts 14 are closer to each other than a configuration in which mounting holes are formed for each of the plurality of tie bolts 14. It can be arranged, and the length of the crankshaft direction X in the cylinder jacket 13 can be shortened, and the cylinder jacket 13 can be reduced in size and weight.

In the cylinder jacket of this embodiment, the mounting hole 59 is made into a long hole shape. Therefore, by arranging the plurality of tie bolts 14 along the longitudinal direction of the mounting hole 59, the plurality of tie bolts 14 can be efficiently disposed, and the opening area of the mounting hole 59 is reduced. Thus, a decrease in the rigidity of the cylinder jacket 13 can be suppressed.

In the cylinder jacket of the present embodiment, mounting holes 59 are formed on both sides of the first through hole 55 and the second through hole 56. Therefore, it is possible to fasten the cylinder jacket 13 in good balance.

Moreover, in the crosshead type internal combustion engine of this embodiment, the base plate 11, the furniture 12 formed on the base plate 11, the cylinder jacket 13 formed on the furniture 12, and the base plate A plurality of tie bolts that penetrate the base plate 11 and the furniture 12 and penetrate the mounting hole 59 of the cylinder jacket 13 to connect the base plate 11 and the furniture 12 and the cylinder jacket 13 ( 14).

Therefore, the cylinder jacket 13, the furniture 12, and the base plate 11 are integrally fastened by the plurality of tie bolts 14, and at this time, the plurality of tie bolts 14 are provided with one mounting hole 59 ), the plurality of tie bolts 14 can be arranged in close proximity, and the overall length of the diesel engine 10 can be shortened, thereby reducing the size and weight.

In the cylinder jacket of the present embodiment, the plurality of tie bolts 14 penetrate through the through holes 46 of the furniture 12, one end is screwed to the base plate 11 and fixed, and the other end thereof is a mounting hole ( 59), while passing through the washer 62 disposed at the end of the mounting hole 59, the nut 15 is screwed and fastened. Therefore, the cylinder jacket 13, the furniture 12, and the base plate 11 are properly fastened in a compressed state by a plurality of tie bolts 14, washers 62, and nuts 15, thereby ensuring high fastening force. can do.

In the cylinder jacket of this embodiment, the hardness of the washer 62 is formed from a material higher than the hardness of the cylinder jacket 13. Accordingly, the washer 62 having high hardness is brought into contact with the cylinder jacket 13 with a high surface pressure due to the fastening force of the plurality of tie bolts 14 and the nut 15, and the cylinder jacket 13 and the furniture 12 ) And the base plate (11) can be properly fastened.

In the crosshead type internal combustion engine of the present embodiment, the plurality of tie bolts 14 are provided with a shake prevention bush 61 at a position opposite to the through hole 46 of the furniture 12. Accordingly, the tie bolts 14, each end of which are fixed to the cylinder jacket 13 and the base plate 11, are supported by the furniture 12 through the anti-shake bush 61, and the tie bolts 14 It is possible to suppress the fluctuation of the cylinder jacket 13, the furniture 12, and the base plate 11 properly.

In addition, in the above-described embodiment, the mounting hole 59 of the cylinder jacket 13 is made into a long hole shape, but it is not limited to this shape, and may be a true circle shape, an oval shape, a polygon shape, or the like.

10: diesel engine (crosshead type internal combustion engine)
11: base plate
12: furniture
13: cylinder jacket
14: tie bolt (connection member)
15: nut
16: cylinder liner
17: cylinder cover
18: piston
19: combustion chamber
21: copper valve device
22: exhaust pipe
23: piston rod
24: crankshaft
25: bearing
26: crank
27: connecting rod
28: guide plate
29: crosshead
31: bearing stand
32: bulkhead
33: side plate
34: bottom plate
35: top plate
39: thick part
40: screw hole
41: top plate
42: bottom plate
43: side plate
44: bulkhead unit
46, 47: through hole
51: top plate
52: bottom plate
53: side plate
54: partition plate
55: first through hole (first through hole)
56: second through hole (second through hole)
58: protrusion
59: mounting hole
61: shake prevention bush (shake prevention member)
62: washer
63: through hole

Claims (6)

Base plate,
Furniture formed on the base plate,
A cylinder jacket formed on the furniture,
A crosshead type internal combustion engine having a plurality of connecting members connecting the base plate and the furniture and the cylinder jacket by penetrating the base plate and the furniture and passing through the mounting hole of the cylinder jacket,
The cylinder jacket,
A top plate having a first penetration portion penetrating in the plate thickness direction;
A bottom plate which penetrates in the plate thickness direction and has a second through part formed opposite the first through part,
And a side plate connecting the top plate and the bottom plate, penetrating along the penetration direction in the first penetrating portion and the second penetrating portion, and forming a mounting hole through which a plurality of connecting members are inserted,
The plurality of connecting members do not contact each other by a washer having a through hole penetrating the plurality of connecting members, and whose outer diameter is set to a dimension larger than the inner diameter of the mounting hole, Placed so as not to touch,
The above furniture,
A top plate in which a plurality of through-holes through which each of the plurality of connecting members penetrates are formed,
A crosshead type internal combustion engine comprising a plurality of anti-shake members disposed in the plurality of through holes and fixing the plurality of connecting members. The method of claim 1,
The mounting hole is a crosshead type internal combustion engine, characterized in that forming a long hole shape. The method of claim 1,
The mounting holes are formed on both sides of the first through portion and the second through portion in the width direction. delete My The method of claim 1,
The plurality of connecting members penetrate each through the plurality of through holes of the furniture, one end is screwed to the base plate to be fixed, the other end is inserted into the mounting hole, and disposed at the end of the mounting hole A crosshead type internal combustion engine, characterized in that the nut is screwed and fastened through the washer. The method of claim 5,
Crosshead type internal combustion engine, characterized in that the hardness of the washer is a material higher than the hardness of the cylinder jacket.

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