WO2012070647A1

WO2012070647A1 - Tool for assembly and disassembly of turbine device, and method of assembly and disassembly of turbine device

Info

Publication number: WO2012070647A1
Application number: PCT/JP2011/077205
Authority: WO
Inventors: 伊藤　仁一; 白石　啓一
Original assignee: 三菱重工業株式会社
Priority date: 2010-11-26
Filing date: 2011-11-25
Publication date: 2012-05-31
Also published as: JP2012112352A; KR20130050368A; EP2644863A1; CN103069127A

Abstract

Disclosed is a simple assembly and disassembly tool simplifying manufacture. The disclosed assembly and disassembly tool increases maintainability and ease of assembly and disassembly operations of a turbine device and, by standardizing the assembly and disassembly tool, makes it possible to reduce storage area and to cut costs. An assembly and disassembly tool (31), which is for singly lifting, moving and positioning components of an exhaust turbocharger (1), has a suspension unit for suspension with a crane, and has multiple holding units (46, 47, 48) for holding individually at least two types of different structural components (3, 4, 16). Suspension holes (41-44) are arranged at positions allowing the assembly and disassembly tool (31) to assume an untilted, upright orientation during suspension with an empty load, and at positions allowing each component (3, 4, 16) to assume an orientation for attachment to the exhaust turbocharger (1) during suspension while holding components (3, 4, 16).

Description

Disassembly / assembly tool for turbine device and disassembly / assembly method for turbine device

The present invention relates to a disassembly / assembly tool for a turbine device that facilitates disassembly / assembly of a turbine device such as a large exhaust turbocharger mounted on a ship, etc., a turbine device using the same, and a disassembly / assembly of the turbine device Regarding the method.

Some large diesel engines installed on ships have an exhaust turbocharger to increase efficiency. In the exhaust turbocharger, a rotor shaft is pivotally supported at the center portion of the casing, and an impeller (turbine wheel) that is rotationally driven by exhaust gas is provided at one end of the rotor shaft, and at the other end of the rotor shaft, It is a structure provided with an impeller (compressor wheel) that compresses air and supplies it to the engine side. The casing has a structure in which casing lid members for guiding exhaust gas and intake air are provided at both ends of the casing body.

When opening (disassembling) a turbine device such as this large exhaust turbocharger for maintenance and inspection, remove the casing lid members fixed at both ends of the casing body as described above to open the casing. Then, the impeller fixed to the rotor shaft is removed, the rotor shaft is further removed, the inspection and replacement are performed, and the work of assembling again is performed. Since each component such as the casing lid member, the impeller, and the rotor shaft is heavy, it is moved and aligned while being lifted by a lifting means such as a crane. In that case, as disclosed in Patent Document 1, a disassembly / reassembly tool designed exclusively for the shape and center of gravity of each component is fixed to each component, By lifting with a crane, each component is lifted so as not to incline in the assembled posture, and is easily attached and detached.

JP 59-81026 A

However, conventionally, as described above, a disassembly / assembly tool designed exclusively for the shape and center of gravity of each component of the turbine device has been used, so that one turbine device is maintained and inspected. It is necessary to use multiple disassembly / reassembly tools separately, and it takes time to select and replace the disassembly / reassembly tools. It was hanging. In addition, it is necessary to replace a plurality of types of disassembly / reassembly tools with a crane one by one, which takes time and effort.

Furthermore, there has been a problem that these multiple disassembly and assembly tools occupy a great amount of space during use and storage. This problem is particularly noticeable in the case of ships. In other words, in a ship, maintenance and inspection work of a turbine device such as an exhaust turbocharger is performed in a narrow engine room, and a plurality of disassembly and assembly tools used at that time occupy a narrow space for maintenance. When it is not in use, it requires a vast storage space near the engine room, and these disassembly and assembly tools are heavy, so that the other load on the ship is sacrificed accordingly. End up.

The present invention has been made to solve the above-described problems, and has a simple and easy-to-manufacture structure, which facilitates disassembly and assembly of the turbine device, improves maintainability, and reduces storage space. An object of the present invention is to provide a disassembling / assembling tool for a turbine apparatus and a disassembling / assembling method for a turbine apparatus.

In order to achieve the above object, the present invention provides the following means.
A disassembling / assembling tool for a turbine apparatus according to a first aspect of the present invention includes a casing in which a casing lid member is provided on a casing body, a rotor shaft that is pivotally supported in the casing, and a detachable attachment to the rotor shaft. When disassembling and assembling a turbine apparatus including an impeller that can be fixed, the component parts such as the casing lid member, the rotor shaft, and the impeller are lifted up and moved and aligned. A disassembling / assembling tool, having a suspension part for lifting each of the component parts by a suspension means, and having a plurality of holding parts for holding at least two of the component parts alone. It is characterized by that.

According to the above configuration, by properly using a plurality of holding portions formed in one disassembly / reassembly tool, a plurality of components of the turbine device are sequentially fixed to one disassembly / reassembly tool, such as a crane or the like. It can be lifted and removed by the lifting means. As described above, since a plurality of components of the turbine device can be handled in common by one disassembly / reassembly tool, a plurality of disassembly / reassembly tools are required for maintenance and inspection of one turbine device as in the prior art. There is no need to use separate parts, and it is possible to dramatically improve the maintainability of the turbine equipment by eliminating the trouble of selecting and replacing the disassembly / reassembly tools. At the same time, the manufacturing cost of the disassembly / reassembly tools is reduced and the storage space is reduced. be able to.

Further, the disassembly / assembly tool for the turbine apparatus according to the first aspect of the present invention is disassembled / assembled when it is lifted by the suspension part in an empty state where none of the components are held by the holding part. When the component is in an upright posture not inclined and is lifted by the suspension portion while the component is held by the holding portion, the component is in an assembly posture to the turbine device. The structure provided in the position from which the suspension part for loads and the suspension part for holding states differ may be sufficient.

In this way, in an empty state where no components of the turbine device are held by the holding part of the disassembly / reassembly tool, a suspension means such as a crane or a chain block is hooked on the suspension part for the empty load. If it is lifted up, the disassembly / reassembly tool is in an upright posture that does not tilt, so that the disassembly / reassembly tool can be easily fixed by being brought into close contact with the components of the turbine device to be removed. Then, in a state where the components of the turbine device are held in the holding portion of the disassembly / reassembly tool, if the lifting means is hooked and lifted to the holding portion for the holding state, the components are transferred to the turbine device. Because of this assembly posture, there is no unnatural inclination and the assembly to the turbine device becomes easy. For this reason, disassembly and assembly work of the turbine device can be facilitated and maintainability can be improved.

A disassembling / assembling tool for a turbine apparatus according to the first aspect of the present invention includes a casing fixing portion for fixing to the casing, and when the rotor fixing shaft is fixed to the casing by the casing fixing portion, the rotor shaft is axially moved. And a rotor shaft support portion that is movably supported. According to this structure, the disassembly / reassembly tool can be fixed to the casing, and the rotor shaft can be supported by the rotor shaft support portion so as to move in the axial direction, that is, can be attached to and detached from the casing. As described above, since the disassembly / reassembly tool can be used for attaching / detaching the rotor shaft, the disassembly / reinstallation tool dedicated to the rotor shaft, which has been conventionally required, is omitted, and the disassembly / reassembly tool is used in common. This makes it easy to improve the maintainability of the turbine device.

A disassembling / assembling tool for a turbine apparatus according to a first aspect of the present invention includes a frame member provided with the above-mentioned suspension part at an upper portion, and a plane direction fixed to the frame member and orthogonal to the axial direction of the turbine apparatus. The holding plate is formed by boring a bolt hole in the holding plate, and each component of the turbine device is fixed to the bolt hole with a bolt. Good. According to this configuration, if a plurality of types of bolt holes are drilled in the holding plate, the disassembly / reassembly tool can be easily made common to the plurality of components. In addition, the structure of the disassembly / assembly tool can be simplified and the manufacture thereof can be facilitated.

Also, a turbine apparatus disassembly / assembly method according to a second aspect of the present invention uses the disassembly / assembly tool having the above-described configuration, and the casing lid member is provided with the casing of the disassembly / assembly tool. A casing lid member attaching / detaching step of fixing the holding portion corresponding to the lid member and attaching / detaching the casing lid member to / from the casing body while holding the casing lid member together with the disassembly / reassembly tool, and the disassembly / assembly in the impeller An impeller attaching and detaching step of attaching and removing the impeller to and from the rotor shaft while fixing the impeller to the rotor shaft while holding the impeller together with the disassembling and assembling tool. It is characterized by.

According to such a disassembling / assembling method for a turbine apparatus, the disassembling / assembling tool used for the casing lid member attaching / detaching step and the disassembling / assembling tool used for the impeller attaching / detaching step can be shared, This eliminates the need to select and replace disassembly / reassembly tools, dramatically improving the maintainability of the turbine equipment and reducing the cost of disassembly / reassembly tools and storage space. Can be reduced.

In the disassembling / assembling method for a turbine apparatus according to the second aspect of the present invention, a casing fixing portion provided in the disassembling / assembling tool is fixed to the casing, and the disassembling / assembling tool is attached to the casing. A rotor shaft attaching / detaching step of attaching / detaching the rotor shaft to / from the casing by holding the rotor shaft on a rotor shaft supporting portion provided in a tool and moving the rotor shaft in the axial direction; Also good.

According to such a disassembling and assembling method of the turbine device, the rotor shaft can be attached and detached using the disassembling and assembling tool used for attaching and detaching the casing lid member and the impeller. This makes it possible to share the disassembly and assembly tools and facilitate the attachment and detachment of the rotor shaft, thereby improving the maintainability of the turbine apparatus.

In the method of disassembling and assembling a turbine apparatus according to the second aspect of the present invention, in the rotor shaft attaching / detaching step, shaft extension members are attached to both ends of the rotor shaft, and one of the shaft extension members is inserted into the rotor shaft support portion. The other shaft extension member may be inserted into a bearing provided inside the casing to move the rotor shaft in the axial direction, and the rotor shaft may be attached to and detached from the casing.

According to such a disassembling and assembling method for a turbine apparatus, when the rotor shaft is moved in the axial direction, the rotor shaft itself is not inserted into the rotor shaft supporting portion of the disassembling / assembling tool, and only the shaft extension member is supported by the rotor shaft. For example, the rotor shaft can be smoothly extracted even if the rotor shaft is in a deep position in the casing. Thereby, it is possible to prevent the highly accurate rotor shaft from being damaged or bent by receiving a bending moment. Also, when the rotor shaft is pulled out from the casing, the opposite shaft extension member remains in the bearing, so the end of the rotor shaft does not suddenly fall out of the bearing. On the contrary, when inserting the rotor shaft into the bearing, the shaft extension member Since the insertion becomes easy as a guide, the rotor shaft can be prevented from being damaged or bent. As described above, since the rotor shaft can be safely inserted and removed without damaging the rotor shaft, the disassembling and assembling work of the turbine device can be facilitated.

As described above, according to the disassembling and assembling tool for the turbine apparatus and the disassembling and assembling method for the turbine apparatus according to the present invention, the disassembly and assembling work of the turbine apparatus can be facilitated and maintained with a simple and easy structure. It is possible to improve and reduce storage space.

1 is a longitudinal cross-sectional view of an exhaust turbocharger that is an example of a turbine apparatus to which a disassembly and assembly tool according to the present invention can be applied. It is a front view of the disassembly and assembly tool according to the present invention. It is a side view of the disassembly / assembly tool according to the present invention. It is a longitudinal cross-sectional view which shows the state by which the disassembly / assembly tool was fixed to the gas inlet inner casing and the air guide casing of the exhaust turbocharger. It is a figure which shows one Embodiment of this invention with the longitudinal cross-section which shows the state from which the gas inlet inner casing and the air guide casing were removed from the casing main body. It is a longitudinal cross-sectional view which shows the state by which the compressor wheel was loosened from the rotor shaft. It is a longitudinal cross-sectional view which shows the state by which the disassembly / assembly tool was fixed to the compressor wheel loosened from the rotor shaft. It is a longitudinal cross-sectional view which shows the state from which the compressor wheel was removed from the rotor shaft. It is a longitudinal cross-sectional view which shows the state by which the disassembly / assembly tool was fixed to the casing main body, and the shaft extension member was attached to the both ends of the rotor shaft. It is a longitudinal cross-sectional view which shows the state which the rotor axis | shaft moved to the axial direction toward the disassembly / assembly tool.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a longitudinal sectional view of a large exhaust turbocharger that is an example of a turbine apparatus to which the disassembly and assembly tool according to the present invention can be applied. The exhaust turbocharger 1 is attached to, for example, a marine diesel engine, but is not limited to a marine vessel and may be used for other purposes. The schematic configuration is as follows.

As shown in FIG. 4, the exhaust turbocharger 1 includes a gas inlet inner casing 3 (casing lid member) at both ends of a casing body 2 composed of a plurality of casing

constituent members

2a, 2b, 2c, 2d, 2e and the like. ) And an air guide casing 4 (casing lid member), and a rotor shaft 6 is pivotally supported in the casing 5. The casing component 2d is a bearing housing, and the rotor shaft 6 is rotatably supported by a pair of

bearings

8 and 9 provided therein. The casing component 2d is provided with a lubrication mechanism 10 that supplies lubricating oil to the

bearings

8 and 9 to lubricate and cool the

bearings

8 and 9, and the casing component 2d itself is also supplied by the lubrication mechanism 10. Cooled by lubricating oil.

A turbine chamber 13 and a compressor chamber 14 are formed inside the casing 5, and a turbine wheel 15 provided integrally with the rotor shaft 6 rotates in the turbine chamber 13 and is detachably fixed to the rotor shaft 6. The compressed compressor wheel 16 rotates on the inner peripheral side of the compressor chamber 14. The compressor wheel 16 is an impeller in which a large number of blades 16b are integrally formed with a boss portion 16a, and the boss portion 16a is fitted to the end portion of the rotor shaft 6 so as to be integrally rotated by spline fitting or the like. The lock nut 16c is covered with a cover member 16d.

The turbine chamber 13 is formed in an annular shape at the inner peripheral portion of the casing component member 2c formed in a funnel shape, and the gas inlet inner casing 3 also formed in the funnel shape is inserted into the inner peripheral portion of the casing component member 2a. The turbine chamber 13 is closed by being fastened by a large number of bolts 18. Reference numeral 19 denotes an inspection lid. And the bypass channel | path 20 which is a spiral flow path is defined between the casing structural member 2a and the gas inlet inner casing 3.

The casing constituent member 2 a is provided with an exhaust gas inlet 21, the casing constituent member 2 b is provided with an exhaust gas outlet 22, and the exhaust gas inlet 21 and the exhaust gas outlet 22 communicate with the turbine chamber 13. Further, the bypass passage 20 connects the downstream side of the exhaust gas inlet 21 and the upstream side of the exhaust gas outlet 22 via the turbine wheel 15. A heat insulating material 23 is wound around the outer periphery of the casing component 2a.

On the other hand, the compressor chamber 14 is configured such that the annular air guide casing 4 is inserted into the inner peripheral portion of the casing constituent member 2e constituting the casing 5 and fastened with a large number of bolts 25. 4 is formed as a spiral channel and can be opened by removing the air guide casing 4. A suction port 4 a is formed in the inner peripheral portion of the air guide casing 4, and this suction port 4 a communicates with the compressor chamber 14 through the blades 16 b of the compressor wheel 16. The cross-sectional area of the compressor chamber 14 gradually decreases along the rotation direction of the compressor wheel 16. A sound insulating material 26 is wound around the casing constituent member 2e, and an air cleaner (not shown) having a sound deadening function is attached to the outside of the suction port 4a.

An exhaust pipe of a diesel engine (not shown) is connected to the exhaust gas inlet 21, and a silencer or an exhaust heat recovery device (not shown) is connected to the exhaust gas outlet 22. On the other hand, a discharge port (not shown) provided at the small end of the compressor chamber 14 is connected to the intake system of the diesel engine.
The high-temperature and high-pressure exhaust gas discharged from the diesel engine flows from the exhaust gas inlet 21, passes through the turbine chamber 13, passes through the bypass passage 20, passes through the turbine chamber 13 again, and is discharged from the exhaust gas outlet 22. Is done. When the exhaust gas passes through the turbine chamber 13 twice in this way, the turbine wheel 15 is rotationally driven at high speed by the energy of the exhaust gas. The rotation of the turbine wheel 15 causes the compressor wheel 16 to rotate at a constant speed via the rotor shaft 6, and the outside air is taken into the compressor chamber 14 from the suction port 4 a by the rotation of the compressor wheel 16, and becomes vortex and narrow along the rotation direction. The air is compressed by the shape of the compressor chamber 14 and is forcibly sent from a discharge port (not shown) to the intake system of the diesel engine, and the intake air of the diesel engine is supercharged.

Next, the structure of the disassembly / assembly tool 31 according to the present invention will be described. This disassembly / reassembly tool 31 is a single component such as the gas inlet inner casing 3, the air guide casing 4, the compressor wheel 16, and the rotor shaft 6 when the exhaust turbocharger 1 is opened (disassembled and maintained). This is a holding jig that can be lifted up and moved and aligned, and is provided in the engine room of a ship in order to maintain the exhaust turbocharger 1.

As shown in FIGS. 2A and 2B, and FIGS. 3 and 4, the disassembly / assembly tool 31 has a substantially U-shape having an upper side 32a, a vertical side 32b, and a lower side 32c in a side view (see FIG. 2A). A frame member 32 formed so as to form a (hook shape), and two upper and lower flat plate-

like holding plates

33 and 34 fixed to the vertical side 32b and the lower side 32c of the frame member 32 are provided. The holding plate 33 is a substantially triangular flat plate along a plane direction orthogonal to the axial direction of the exhaust turbocharger 1, and the holding plate 34 is a substantially half-moon shaped flat plate that is parallel to the holding plate 33 and positioned below. . The holding plate 34 is disposed so as to be closer to the exhaust turbocharger 1 than the holding plate 33.

Further, an arm member 35 extending downward is fixed to the holding plate 34. The arm member 35 is a channel material having a substantially U-shaped cross section, for example. A right-angled triangular reinforcing plate 36 is fixed between the back surface of the arm member 35 and the lower side of the frame member 32. A rectangular reinforcing plate 37 that is long in plan view is fixed to the lower surface of the upper side 32a of the frame member 32. These

parts

32, 33, 34, 35, 36, and 37 are all made of steel and are welded and integrated with each other. However, for example, all or part of them may be integrally formed.

In the upper side 32a of the frame member 32, for example, suspension holes 41, 42, 43, and 44 (suspension portions) are perforated at four locations in order to be lifted by a suspension means such as a crane. On the other hand, for example, two types of bolt holes 46, 47 are drilled in each of the holding plate 33, and four types of bolt holes 48 are drilled in the holding plate 34, for example.

Cylindrical spacers

49 and 50 are fixed to the bolt holes 47 and 48 on the surface facing the exhaust turbocharger 1. As shown in FIGS. 3 and 4, the bolt holes 46 and 48 function as a holding unit for holding the air guide casing 4 of the exhaust turbocharger 1 alone, and the bolt hole 47 is also the gas inlet inner casing 3. It functions as a holding part that holds a single unit.
The bolt holes 46, 47, 48 are arranged in an arc shape in accordance with the positions of the bolt holes 51, 52, 53 (see FIGS. 1 and 3) provided in the air guide casing 4 and the gas inlet inner casing 3, respectively. The air guide casing 4 and the gas inlet inner casing 3 are fixed to these bolt holes 46, 47, 48 with

bolts

54, 55, 56 (see FIG. 3).

Further, for example, four circular openings 58 are formed between the bolt holes 46 and 47 of the holding plate 33. As shown in FIG. 8, these circular openings 58 function as casing fixing portions for fixing the disassembly / assembly tool 31 to the casing body 2 (for example, the casing component 2a). As shown in FIG. 8 in an enlarged manner, for example, a bolt 18 for fixing the gas inlet inner casing 3 to the casing component 2a is used, and the bolt 18 is fixed to the circular opening 58 from the opposite side. The disassembly / assembly tool 31 is fixed to the casing body 2 by inserting the hollow bolt 60 into the circular opening 58 and fastening the female screw formed inside the hollow bolt 60 to the bolt 18.

Furthermore, two large and small

shaft insertion openings

63 and 64 are formed in the upper and lower portions of the disassembly / assembly tool 31 near the lower end of the arm member 35. As shown in FIGS. 8 and 9, the upper large shaft insertion opening 63 allows the rotor shaft 6 (the shaft extension member 75) to pass through when the disassembly / reassembly tool 31 is fixed to the casing body 2. The lower small shaft insertion opening 64 functions as a holding unit for holding the compressor wheel 16 as a single unit, as shown in FIGS. 6 and 7. To do. The shaft insertion opening 64 is formed in both the back surface of the arm member 35 and the bridge plate 65 installed on the inner side of the U-shaped cross section of the arm member 35.

Incidentally, as described above, four

suspension holes

41, 42, 43, 44 are formed on the upper side of the frame member 32 as suspension parts for lifting with a crane or the like. The

holes

41, 42, 43, and 44 are selectively used depending on the usage status of the disassembly / assembly tool 31. That is, the

components

3, 4 and 16 of the exhaust turbocharger 1 are not held in the holding portions (bolt holes 46, 47, and 48 and the shaft insertion opening 64) provided in the disassembly / assembly tool 31. Since the position of the center of gravity of the disassembly / reassembly tool 31 changes significantly between the empty state and the holding state in which some components are held, the suspension hole 41 for the empty state and the holding state for the holding state are provided. The suspension holes 42, 43, and 44 are individually provided.

The position of the center of gravity of the disassembly / reassembly tool 31 when no load is held is close to the vertical side 32b of the frame member 32. The disassembling / assembling tool 31 is lifted by hooking a lifting tool such as a wire rope, a hook, or a shackle to the holding hole 41 for empty load that is closest to. Thereby, the attitude | position of the disassembly / assembly tool 31 is maintained in the upright attitude | position shown to FIG. 2B. When any component is held on the disassembly / reassembly tool 31, the position of the center of gravity of the combined product of the disassembly / reassembly tool 31 and the component is higher on the upper side 32 a of the frame member 32 than the position of the suspension hole 41. Move to the tip side.

For example, as shown in FIG. 7, when the compressor wheel 16 is held by the disassembly / reassembly tool 31, the position of the center of gravity of the combined product of the disassembly / reassembly tool 31 and the compressor wheel 16 is located immediately below the suspension hole 42. For this reason, the disassembly / reassembly tool 31 is lifted by hooking the suspension tool to the suspension hole 42. As a result, the posture of the disassembling / assembling tool 31 is maintained in the upright posture, and at the same time, the compressor wheel 16 is attached to the exhaust turbocharger 1 (the same posture as when it is incorporated). Similarly, as shown in FIG. 4, when the gas inlet inner casing 3 is held by the disassembly / assembly tool 31, the position of the suspension hole 44, and when the air guide casing 4 is held, the position of the suspension hole 43. Then, each of the disassembly and assembly tools 31 is lifted. Thereby, the gas inlet inner casing 3 and the air guide casing 4 can be lifted in the assembled posture.

Next, a method for disassembling (opening) and assembling the exhaust turbocharger 1 using the disassembling / assembling tool 31 configured as described above will be described. This disassembly and assembly method includes a casing lid member attaching / detaching step of attaching / detaching the gas inlet inner casing 3 or the air guide casing 4 to / from the casing body 2, an impeller attaching / detaching step of attaching / detaching the compressor wheel 16 to / from the rotor shaft 6, A rotor shaft attaching / detaching step of attaching / detaching the rotor shaft 6 to / from the casing body 2. Below, these each process is demonstrated in order.

[Case lid member attaching / detaching step]
In this casing lid member attaching / detaching step, as shown in FIG. 3, the disassembly / assembly tool 31 is first fixed to the gas inlet inner casing 3 or the air guide casing 4. In any case, the gas inlet inner casing 3 or the air guide casing is maintained while the disassembly / assembly tool 31 in the non-holding state (empty state) is suspended from the position of the suspension hole 41 by a crane or the like and kept in an upright posture. Assign to 4.
When the disassembly / assembly tool 31 is fixed to the gas inlet inner casing 3, the four bolt holes 47, which are the holding parts corresponding to the gas inlet inner casing 3, of the disassembly / assembly tool 31 are provided in the gas inlet inner casing 3. The four bolt holes 53 are fixed with bolts 56. Further, when the disassembly / reassembly tool 31 is fixed to the air guide casing 4, the bolt holes 46 and 48, which are holding parts corresponding to the air guide casing 4, of the disassembly / reassembly tool 31 are connected to the bolt holes of the air guide casing 4. It is fixed with

bolts

54 and 55 according to 51 and 52.

Next, when lifting the gas inlet inner casing 3 with a lifting tool such as a wire rope, hook, or shackle that has been hooked on the lifting hole 41 of the disassembly / reassembly tool 31, When the casing 4 is lifted, the casing 4 is re-hanged on the suspension hole 43 and removed from the casing body 2 while supporting the weight of the gas inlet inner casing 3 or the air guide casing 4 by a suspension means such as a crane. The removed gas inlet inner casing 3 or air guide casing 4 is conveyed to a predetermined place. The attachment is performed in the reverse order.

[Impeller installation and removal process]
In the impeller attaching / detaching step, first, the cover member 16d of the compressor wheel 16 is removed, and the lock nut 16c fixing the compressor wheel 16 to the rotor shaft 6 is loosened and removed with an impact wrench or the like, as shown in FIG. Then, a dedicated punching tool (drawing pipe) 71 is fixed to the boss portion 16 a of the compressor wheel 16 and the handle 72 of the punching tool 71 is tightened to pull the compressor wheel 16 in the axial direction. Pull out to the extent that it does not fall out.

Next, the handle 72 is removed from the punching tool 71, and as shown in FIG. 6, the disassembly / reassembly tool 31 suspended in the upright posture by the suspension hole 41 is applied to the compressor wheel 16, and Then, the punching tool 71 is inserted into the shaft insertion opening 64 which is a holding portion corresponding to the compressor wheel 16, and the handle 72 of the punching tool 71 is tightened. As a result, the compressor wheel 16 is held by the disassembly / assembly tool 31 via the punching tool 71. Then, after suspending the lifting tool such as a wire rope, hook, shackle, etc., which has been hooked on the lifting hole 41 of the disassembly / reassembly tool 31, on the lifting hole 42 for lifting the compressor wheel 16, 7, the compressor wheel 16 is pulled out from the rotor shaft 6 while supporting the weight of the compressor wheel 16 by a suspension means such as a crane. The extracted compressor wheel 16 is conveyed to a predetermined place. The compressor wheel 16 is attached in the reverse procedure.

[Rotor shaft attaching / detaching step]
When the rotor shaft 6 is extracted from the casing body 2 after the compressor wheel 16 is removed as described above, the disassembly / assembly tool 31 is attached to the end surface of the casing component member 2a as shown in FIG. That is, the circular opening 58, which is a casing fixing portion provided in the disassembly and assembly tool 31, is aligned with the position of the bolt 18 on the end surface of the casing component 2a, and the fixing hollow bolt 60 is inserted into the circular opening 58 from the outside. The disassembly / assembly tool 31 is fixed to the end surface of the casing component 2a by fastening the hollow bolt 60 to the bolt 18.

Next, straight tubular

shaft extending members

75 and 76 are attached to both ends of the rotor shaft 6. The shaft extension member 75 attached to the end of the rotor shaft 6 on the turbine wheel 15 side is inserted into the shaft insertion opening 63 of the disassembly / reassembly tool 31, and a connecting screw 75 c protruding from the tip of the shaft extension member 75 is connected to the rotor shaft 6. The rotor shaft 6 is coupled by being screwed to the end of the rotor.
The shaft extension member 75 includes a front half portion 75a and a rear half portion 75b in order to improve the handling and assembling properties inside the narrow engine room of the ship and to make the length during storage compact. A connection screw 75d built in the front half 75a is fastened to a connection plate 75e provided in the rear half 75b and assembled into a single shaft extension member 75.
On the other hand, the shaft extension member 76 attached to the end of the rotor shaft 6 on the compressor wheel 16 side is mounted so as to cover the outer periphery of the portion into which the compressor wheel 16 is inserted. A tapered cap member 76a is provided at the distal end portion, and a holding ring 76b for tightly holding the thin distal end of the rotor shaft 6 is provided on the inner periphery of the intermediate portion.

Then, with the shaft extension member 75 held in the shaft insertion opening 63 of the disassembly / reassembly tool 31 in this way, the rotor shaft 6 is moved in the axial direction toward the disassembly / reassembly tool 31 side. As shown in FIG. 9, the rotor shaft 6 can be removed from the casing body 2 in the assembled posture, and at that time, the shaft extension member 76 is a bearing provided inside the casing body 2 (casing constituent member 2d). 8 and 9 are inserted. At this time, the end of the rotor shaft 6 on the compressor wheel 16 side has come off from one bearing 8, and only the thin portion of the rotor shaft 6 is inserted through the other bearing 9, but the length of this end is Since the shaft extension member 76 which compensates for the thinness and is concentrically mounted on the rotor shaft 6 by the holding ring 76b is passed through the

bearings

8 and 9, the rotor shaft 6 rattles inside the

bearings

8 and 9. There is no. Further, the end of the rotor shaft 6 on the turbine wheel 15 side is not inserted into the shaft insertion opening 63 of the disassembly / assembly tool 31.

Next, with the disassembly / reassembly tool 31 attached with the positional relationship of FIG. 9, the rotor shaft 6 is moved to a position where it can be extracted in the extraction direction (rightward toward FIG. 9). Then, the

shaft extension members

75 and 76 are removed, and a wire rope or the like is hung on the front and rear positions of the turbine wheel 15 to support the entire weight of the rotor shaft 6. In this state, the disassembly / reassembly tool 31 is removed from the end surface of the casing component member 2 a while being hung with a crane or the like at the position of the suspension hole 41, and is extracted from the rotor shaft 6. Then, the rotor shaft 6 is extracted from the casing body 2. The attachment of the rotor shaft 6 is performed in the reverse procedure.

The disassembling / assembling tool 31 configured as described above has three types of holding portions, that is, bolt holes 47 that are holding portions of the gas inlet inner casing 3, and bolt

holes

46 and 48 that are holding portions of the air guide casing 4. And a shaft insertion opening 64 which is a holding portion of the compressor wheel 16, and each of the components is constituted by one disassembly / reassembly tool 31 by appropriately using these holding

portions

46, 47, 48, 64. The

parts

3, 4, and 16 can be lifted and attached to or removed from the exhaust turbocharger 1.

As described above, since a plurality of

components

3, 4, and 16 of the exhaust turbocharger 1 can be handled in common by the single disassembly and assembly tool 31, one exhaust turbocharger 1 as in the prior art. It is no longer necessary to prepare and use multiple disassembly / reassembly tools separately for maintenance and inspection, improving work efficiency by eliminating the need to select and replace disassembly / reassembly tools, and maintainability of the exhaust turbocharger 1 Can be drastically improved, the manufacturing and management costs of the disassembly / reassembly tool 31 can be reduced, and the storage space for the disassembly / reassembly tool 31 can be greatly reduced.

The disassembly / assembly tool 31 is provided with a plurality of suspension holes 41, 42, 43, 44 for lifting by suspension means such as cranes and chain blocks. When the disassembly / reassembly tool 31 is lifted by the holding hole 41 in a state where nothing is held by the disassembly / reassembly tool 31, the disassembly / reassembly tool 31 is provided in a position in an upright posture that does not tilt. Each structure of the exhaust turbocharger 1 from which the holding parts (bolt holes 46, 47, 48 and the shaft insertion opening 64) of the disassembly / reassembly tool 31 suspended in an empty state are to be removed. Fixing work can be easily performed by making the

parts

3, 4 and 16 naturally adhere to each other, and the workability can be greatly improved.

On the other hand, the suspension holes 42, 43, 44 are provided in the state in which components such as the compressor wheel 16, the air guide casing 4, and the gas inlet inner casing 3 are held by the disassembly / assembly tool 31. , 43 and 44 are individually lifted so that the

component parts

16, 4, 3 are not inclined and are assembled to the exhaust turbocharger 1, so that the assembly to the exhaust turbocharger 1 is possible. It becomes easy. For this reason, the disassembly and assembly work of the exhaust turbocharger 1 can be facilitated and the maintainability can be improved.

Further, the disassembly / reassembly tool 31 has a circular opening 58 as a casing fixing part for fixing to the casing 5 of the exhaust turbocharger 1, and a rotor when the circular opening 58 is fixed to the casing 5 by the circular opening 58. Since the shaft insertion opening 63 serving as a rotor shaft support that supports the shaft 6 so as to be movable in the axial direction is provided, the disassembly / assembly tool 31 can also be used as a tool for attaching / detaching the rotor shaft 6. For this reason, the assembly / removal tool 31 is made common by omitting the attachment / detachment tool dedicated to the rotor shaft, which has been conventionally required, and the maintenance of the exhaust turbocharger 1 is improved by facilitating the attachment / detachment of the rotor shaft 6. Can be made.

Further, the disassembly / assembly tool 31 includes a frame member 32 provided with suspension holes 41, 42, 43, and 44 as suspension portions on an upper portion thereof, and the exhaust turbocharger 1 fixed to the frame member 32. And holding

plates

33 and 34 along the surface direction orthogonal to the axial direction of the plate. Bolt holes 46, 47 and 48 are formed in the holding

plates

33 and 34, and these bolt holes 46, 47 and 48 are formed. Since the exhaust turbocharger 1 is a holding portion that holds each component (gas inlet inner casing 3, air guide casing 4), a plurality of bolt holes 46, 47, formed in the holding

plates

33, 34, By appropriately setting the drilling positions of 48 or adding bolt holes, the disassembly / assembly tool 31 can be easily shared widely for a plurality of components of the exhaust turbocharger 1. In addition, the structure of the disassembly / assembly tool 31 can be simplified and the manufacture thereof can be facilitated.

The exhaust turbocharger 1 assembled using the disassembly and assembly tool 31 configured as described above has a gas inlet inner casing 3, an air guide casing 4, a compressor wheel 16, and the like that need to be attached and detached at the time of opening maintenance. Since the disassembly / reassembly tool 31 for attaching / detaching the component parts such as the rotor shaft 6 is made common to one, the attaching / detaching work of the

respective component parts

3, 4, 16, 6 is easy, and the maintainability is improved at each stage. Has improved. In addition, since only one disassembly / reassembly tool 31 that has conventionally been required is required, there is an effect that the storage space for the disassembly / requirement tool 31 can be greatly reduced particularly in a narrow ship or the like. Can be easily maintained.

In addition, as described above, the method for disassembling and assembling the exhaust turbocharger 1 according to the present invention includes the holding portions (bolt holes 46, 47, 48) of the disassembling / assembling tool 31 in the gas inlet inner casing 3 or the air guide casing 4. ), And the casing lid member attaching / detaching step for attaching / detaching to the casing body 2 while holding the gas inlet inner casing 3 or the air guide casing 4 together with the disassembling / assembling tool 31 by a suspension means such as a crane, and the compressor wheel 16 A holding part (shaft insertion opening 64) of the assembly tool 31 is fixed, and an impeller attaching and detaching process for attaching and detaching the compressor wheel 16 to and from the rotor shaft 6 while holding the compressor wheel 16 together with the disassembly and assembly tool 31 is provided. In the casing lid member attaching / detaching step and the impeller attaching / detaching step, the disassembling / assembling tool 31 to be used is shared. For this reason, it is not necessary to use a plurality of disassembly / reassembly tools differently as in the prior art, and the maintenance of the exhaust turbocharger 1 is dramatically improved by eliminating the need for selecting and replacing the disassembly / reassembly tools. Costs related to the manufacture / management of the disassembly / reassembly tool 31 and the storage space can be reduced.

In addition, in the disassembly / assembly method of the exhaust turbocharger 1 according to the present invention, the disassembly / assembly tool 31 is configured by fixing the casing fixing portion (circular opening 58) provided in the disassembly / assembly tool 31 to the casing 5. Is attached to the casing 5, the rotor shaft 6 is held in the rotor shaft support portion (shaft insertion opening 63) provided in the disassembly / assembly tool 31, and the rotor shaft 6 is moved in the axial direction, whereby the rotor shaft 6 is moved. A rotor shaft attaching / detaching step for attaching / detaching to / from the casing 5 is further included. For this reason, the rotor shaft 6 can be attached and detached by using the disassembly / reassembly tool 31 used for attaching and detaching the gas inlet inner casing 3, the air guide casing 4 and the compressor wheel 16. While disassembling and assembling tool 31 can be made common by omitting tools, the rotor shaft 6 can be easily attached and detached, and the maintainability of the exhaust turbocharger 1 can be further improved.

In this rotor shaft attaching / detaching step, straight tubular

shaft extension members

75 and 76 are attached to both ends of the rotor shaft 6, and one shaft extension member 75 is a shaft insertion opening which is a rotor shaft support portion of the disassembly / assembly tool 31. The other shaft extension member 76 is inserted into the

bearings

8 and 9 provided inside the casing 5 to move the rotor shaft 6 in the axial direction, and the rotor shaft 6 is attached to and detached from the casing 5. It is characterized by that.

According to this disassembly and assembly method, when the rotor shaft 6 is moved in the axial direction, the rotor shaft 6 itself is not inserted into the shaft insertion opening 63 of the disassembly and assembly tool 31, and only the shaft extension member 75 is inserted into the shaft insertion opening. Since it is inserted through the portion 63, the rotor shaft 6 can be smoothly extracted even if the rotor shaft 6 is in the recessed position of the casing 5 as in this embodiment. Thereby, it is possible to prevent the highly accurate rotor shaft 6 from being damaged or bent by receiving a bending moment.
Further, when the rotor shaft 6 is removed from the casing 5, the opposite shaft extension member 76 is left inserted in the

bearings

8 and 9, so that the end of the rotor shaft 6 is not suddenly dropped from the

bearings

8 and 9, When the rotor shaft 6 is inserted into the

bearings

8 and 9, the shaft extension member 76 serves as a guide to facilitate insertion. In particular, since the tapered cap member 76a is provided at the distal end portion of the shaft extension member 76, it can be smoothly inserted into the

bearings

8 and 9, and the rotor shaft 6 can be prevented from being damaged or bent.
Thus, since it can be safely inserted and removed without damaging the rotor shaft 6, disassembly and assembly work of the exhaust turbocharger 1 can be facilitated.

Needless to say, the disassembly / assembly tool 31 and the disassembly / assembly method according to the present invention are not limited to the above embodiments. For example, in the above-described embodiment, the disassembly / assembly tool 31 includes the bolt holes 46, 47, as the holding portion for holding the gas inlet inner casing 3, the air guide casing 4, the compressor wheel 16, and the rotor shaft 6 and the rotor shaft support portion. 48 and

shaft insertion openings

63 and 64 are provided, but other forms of holding parts may be provided so that other components of the exhaust turbocharger 1 can be held and attached.

Moreover, in the said embodiment, as an example of a suspension part for lifting the disassembly / reassembly tool 31 by a lifting means such as a crane, four

suspension holes

41 and 42 are formed in the frame member 32 constituting the disassembly / reassembly tool 31. , 43 and 44 are provided, but these may be replaced with hooks or the like, and the location thereof may be changed as appropriate.
Furthermore, in the said embodiment, although the exhaust turbo supercharger 1 was illustrated as a turbine apparatus which can apply the disassembly / reassembly tool which concerns on this invention, another kind of turbine apparatus may be sufficient.

1 Exhaust turbocharger (turbine device)
2 Casing body 3 Gas inlet inner casing (casing lid member which is a component of the turbine device)
4 Air guide casing (casing lid member which is a component of the turbine device)
5 Casing 6 Rotor shaft (component of turbine equipment)
8,9 Bearing 16 Compressor wheel (impeller which is a component of turbine equipment)
31 Disassembly / Assembly Tools 32

Frame members

33, 34

Holding plates

41, 42, 43, 44 Suspension holes (suspension sections)
46, 47, 48 Bolt hole (holding part)
58 Circular opening (casing fixing part)
63 Shaft insertion opening (rotor shaft support)
64 Shaft insertion opening (holding part)
75,76 Shaft extension member

Claims

A casing in which a casing lid member is provided on the casing body;
A rotor shaft pivotally supported inside the casing;
When disassembling and assembling a turbine apparatus comprising an impeller detachably fixed to the rotor shaft, the components such as the casing lid member, the rotor shaft, and the impeller are lifted up and moved and positioned Disassembling / assembling tools for matching,
While having a suspension part for lifting each of the component parts with a suspension means,
A disassembling / assembling tool for a turbine apparatus, comprising: a plurality of holding portions for holding at least two of the component parts alone.
When the component is lifted by the suspension unit in an empty state where none of the component parts is held by the holding unit, the disassembly / reassembly tool is in an upright posture so that the component parts are held by the holding unit. The suspension part for the empty load and the suspension part for the holding state are provided at different positions so that the components are assembled to the turbine device when lifted by the suspension part in the state. The disassembly / assembly tool for a turbine apparatus according to claim 1, wherein the disassembly / assembly tool is provided.
A casing fixing portion for fixing to the casing, and a rotor shaft support portion that supports the rotor shaft so as to be movable in the axial direction when fixed to the casing by the casing fixing portion. The disassembly / assembly tool for a turbine apparatus according to claim 1 or 2.
It has a frame member provided with the above-mentioned suspension part in the upper part, and a holding plate which is fixed to this frame member and extends along a surface direction perpendicular to the axial direction of the turbine device, and a bolt hole is drilled in the holding plate. 4. The disassembled assembly of a turbine apparatus according to claim 1, wherein the holding portion is configured, and each component of the turbine apparatus is fixed to the bolt hole with a bolt. 5. Essentials.
A disassembling / assembling method for a turbine apparatus using the disassembling / assembling tool according to any one of claims 1 to 4,
A holding portion of the disassembly / reassembly tool corresponding to the casing cover member is fixed to the casing cover member, and the casing cover member is attached to and detached from the casing body while being held by a suspension means together with the disassembly / reassembly tool. A casing lid member attaching / detaching step;
An impeller is attached to and detached from the rotor shaft while fixing a holding portion of the disassembly / reassembly tool corresponding to the impeller to the impeller and holding the impeller together with the disassembly / reassembly tool by a holding means. Process,
A method for disassembling and assembling a turbine apparatus, comprising:
A casing fixing portion provided in the disassembly / reassembly tool is fixed to the casing, the disassembly / reassembly tool is attached to the casing, and a rotor shaft support portion provided in the disassembly / reassembly tool holds the rotor shaft. 6. The method of disassembling and assembling a turbine apparatus according to claim 5, further comprising a rotor shaft attaching / detaching step of attaching / detaching the rotor shaft to / from the casing by moving the rotor shaft in the axial direction.
In the rotor shaft attaching / detaching step, a shaft extending member is attached to both ends of the rotor shaft, one shaft extending member is inserted into the rotor shaft supporting portion, and the other shaft extending member is provided inside the casing. The turbine assembly disassembly / assembly method according to claim 6, wherein the rotor shaft is moved in the axial direction by being inserted into the casing, and the rotor shaft is attached to and detached from the casing.