Compressor, assembling and disassembling device therefor, and assembling and disassembling method therefor

An assembling and disassembling device for a compressor has a substantially cylindrical bundle that is received insertably and removably on an inner circumferential surface of a substantially tubular compressor casing that is mounted horizontally and further includes: a plate-like member that is provided on an axial end portion of the bundle at an opposite side of an insertion direction so as to protrude outward in a radial direction of the bundle and a threaded-rod member that inserts and removes the bundle connected to the plate-like member into and from the compressor casing by being screwed into a threaded hole provided in the plate-like member and being rotated.

BACKGROUND OF THE INVENTION

1. Technical Field

The present invention relates to a vertical split type (barrel) compressor, an assembling and disassembling device therefor, and an assembling and disassembling method therefor, and in particular, to insertion and removal thereof regarding a compressor casing and a bundle.

2. Description of the Related Art

A vertical split type compressor generally has a configuration that allows a substantially cylindrical bundle, which includes components such as rotors, blades, and so forth, to be inserted (assembled) into and removed (disassembled) from a substantially tubular compressor casing (hereinafter referred to as “casing”) in the axial direction of the casing.

When the bundle is inserted into and removed from the casing in such a way, the insertion and the removal are performed by using a towing cable (see, for example, Japanese Unexamined Patent Application, Publication No. 2009-513863) and by providing a hydraulic jack on an end surface of the bundle.

In addition, Japanese Unexamined Utility Model Application, Publication No. Hei 2-72400 discloses that the bundle is inserted into and removed from the casing by using a threaded rod that is fixed to an end surface of the casing and a nut for assembling and a nut for disassembling that are screwed into the threaded rod, and by screwing and rotating the nuts about the axis of the threaded rod.

SUMMARY OF THE INVENTION

1. Technical Problem

However, with the inventions described in JP 2009-513863 and JP 2-72400, when the insertion and removal work is performed, if an external force, such as a swaying force, is applied to the compressor due to the movement during operation at sea etc., the bundle shifts in the direction orthogonal to the axial direction of the bundle, and there is a problem in which the insertion and removal work becomes difficult.

In addition, because it is necessary to change the mounting position of the hydraulic jack depending on the progress of the insertion and removal work when the insertion and removal work is performed by using the hydraulic jack, there is a problem in that the operation requires a significant amount of time.

The present invention has been conceived in light of the above-described circumstances, and an object thereof is to provide a compressor that allows the insertion and removal work to be performed with ease, an assembling and disassembling device therefor, and an assembling and disassembling method therefor.

2. Solution to the Problem

In order to solve the aforementioned problems, a compressor, an assembling and disassembling device therefor, and an assembling and disassembling method therefor according to the present invention employ the following solutions.

An assembling and disassembling device for a compressor according to a first aspect of the present invention is a assembling and disassembling device for a compressor having a substantially cylindrical bundle that is received insertably and removably on an inner circumferential surface of a substantially tubular compressor casing that is positioned horizontally, the assembling and disassembling device comprising: a plate-like member that is provided on an axial end portion of the bundle at an opposite side in an insertion direction of the bundle so as to protrude outward from the bundle in a radial direction thereof; and a threaded-rod member that inserts and removes the bundle connected to the plate-like member into and from the compressor casing by being screwed into a threaded hole provided in the plate-like member and being rotated.

The plate-like member that has the threaded hole and that is fixed to the end portion of the bundle in the axial direction and the threaded-rod member that is screwed into the threaded hole of the plate-like member are provided. Thus, the threaded-rod member rotates in the threaded hole of the plate-like member, thereby making it possible to insert and remove the bundle connected to the plate-like member into and from the compressor casing. In this way, because the threaded-rod member is screwed into the threaded hole of the plate-like member, even when the bundle experiences vertical movement due to an external force applied to the bundle during the insertion and removal work, it is possible to suppress the movement of the bundle by means of the threaded-rod member and the threaded hole of the plate-like member. Therefore, the insertion and removal work of the compressor can be performed.

The assembling and disassembling device for the compressor according to the first aspect of the present invention may further include a support member that is curved along an outer circumferential surface of the bundle and that supports the bundle from below by being provided below an axial end portion of the compressor casing at an opposite side of the casing in the insertion direction.

The support member that is curved along the outer circumferential surface of the bundle is provided below the end portion of the compressor casing at the opposite side from the insertion direction. Thus, even when the bundle experiences lateral movement due to an external force applied to the bundle during the insertion and removal work, it is possible to suppress the lateral movement of the bundle by means of the support member. Therefore, the insertion and removal work of the compressor can be performed.

A compressor according to a second aspect of the present invention is a compressor including: a substantially tubular compressor casing; and a substantially cylindrical bundle that is received insertably and removably on an inner circumferential surface of the compressor casing, wherein an axial end portion of the bundle at an opposite side in an insertion direction of the bundle is provided with a plate-like-member attaching hole for attaching a plate-like member having a threaded hole which a threaded-rod member penetrates through and the threaded-rod member is screwed with.

The bundle of the compressor is provided with the plate-like-member attaching hole for attaching the plate-like member having the threaded hole through which the threaded-rod member penetrates and into which the threaded-rod member is screwed when the bundle is inserted into and removed from the compressor casing. Thus, even when the compressor experiences vertical movement during the insertion and removal work, it is possible to suppress the vertical movement of the bundle. Therefore, it is possible to provide the compressor that allows the insertion and removal work to be easily performed under the presence of vertical movement.

A compressor assembling and disassembling method according to a third aspect of the present invention uses a compressor assembling and disassembling device, wherein the compressor assembling and disassembling device comprises: a plate-like member that protrudes outward from a substantially cylindrical bundle in a radial direction thereof, the bundle being received insertably and removably on an inner circumferential surface of a substantially tubular compressor casing that is positioned horizontally, the plate-like member being provided on an axial end portion of the bundle at an opposite side in an insertion direction of the bundle, and a threaded-rod member for inserting and removing the bundle connected to the plate-like member into and from the compressor casing by being screwed into a threaded hole provided in the plate-like member and being rotated, the compressor assembling and disassembling method comprising rotating the threaded-rod member when the bundle is inserted into and removed from the casing.

3. Advantageous Effects of the Invention

The plate-like member that has the threaded hole and that is fixed to the end portion of the bundle in the axial direction, and the threaded-rod member that is screwed into the threaded hole of the plate-like member are provided. Thus, the threaded-rod member rotates in the threaded hole of the plate-like member, thereby making it possible to insert and remove the bundle connected to the plate-like member into and from the compressor casing. In this way, because the threaded-rod member is screwed into the threaded hole of the plate-like member, even when the bundle experiences vertical movement due to an external force applied to the bundle during the insertion and removal work, it is possible to suppress the movement of the bundle by means of the threaded-rod member and the threaded hole of the plate-like member. Therefore, the insertion and removal work of the compressor can be performed.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1shows a diagram showing, in outline, the configuration of an assembling and disassembling device for a vertical split type compressor according to an embodiment of the present invention, andFIGS. 2A to 2Eshow a procedure for removing a bundle from a compressor casing using the assembling and disassembling device shown inFIG. 1.

An assembling and disassembling device1is used for assembling and disassembling a vertical split type (hereinafter referred to as “barrel”) compressor31, that is mounted horizontally, by inserting and removing a substantially cylindrical bundle32that is received in a substantially tubular compressor casing (hereinafter referred to as “casing”)33, which are components of the compressor31, so that the bundle32is insertable and removable from the inner circumferential surface of the casing33.

The assembling and disassembling device1is principally provided with a travelling plate (plate-like member)2that is provided on an axial end surface (end portion)32aof the bundle32at the opposite side in the insertion direction of the bundle32, that is to be inserted into the casing33, so as to protrude outward in the radial direction of the bundle32, and a travelling rod (threaded-rod member)3that inserts and removes the bundle32connected to the travelling plate2into and from the casing33by being screwed into a threaded hole2aprovided in the travelling plate2and being rotated.

The compressor31is principally constructed of the substantially cylindrical bundle32, which includes components such as a rotor34, blades (not shown), and so forth, in the interior thereof, and the substantially tubular casing33. The casing33is installed on an upper surface of a compressor holder (not shown) such that its axial direction extends horizontally. The end surface32aof the bundle32is provided with travelling-plate attaching holes (plate-like-member attaching holes) for attaching the travelling plate2, and an end surface33a, which will be described below, of the casing33is provided with bundle support attaching holes (not shown) for fixing a bundle support (support member)13.

The compressor31of this embodiment is mounted on ships or a floating production storage & offloading unit (FPSO: Floating Production Storage & Offloading unit).

The travelling plate2has a substantially quadrangular shape and is fixed to the lower part of the end surface32aof the bundle32by a plurality of bolts2bso as to protrude outward in the radial direction of the bundle32. The travelling plate2that protrudes outward in the radial direction of the bundle32is provided with, at one location, the threaded hole2ainto which the travelling rod3is screwed.

The travelling rod3is a feed screw having a screw thread on its outer circumferential surface over the entire length in the axial direction thereof. A trapezoidal screw thread having a trapezoidal shape is used as the screw thread of the travelling rod3. A first end of the travelling rod3penetrates the travelling plate2by being screwed into the threaded hole2aprovided in the travelling plate2. The first end of the travelling rod3penetrating the travelling plate2is in contact with the bundle support13, which will be described below.

The axial direction of the travelling rod3extends in substantially the same direction as the lengthwise direction of rails5aprovided on the upper surface of bases5, which will be described below. The second end of the travelling rod3extending towards the left direction inFIG. 1from the travelling plate2penetrates through substantially the center portion of a travelling support6, which will be described below, in the lengthwise direction. An air wrench7is provided on the second end of the travelling rod3penetrating the travelling support6.

Two bases5are provided under the bundle32. The bases5are provided such that their extension directions are both in substantially the same direction as the axial direction of the compressor31and are in parallel with each other. Formed on the upper surface of each of the bases5is the rail5a, on which a side roller8, which will be described below, rolls.

The travelling support6is fixed to the end portions of the respective bases5by bolts6aso as to connect the lengthwise end portions of the two bases5to each other. The travelling support6has a substantially rectangular shape and is provided with a threaded hole (not shown) at substantially the center portion in the lengthwise direction thereof. The travelling rod3described above is screwed into and penetrates through the threaded hole provided in the travelling support6.

The air wrench7provided on the second end of the travelling rod3drives the travelling rod3by being driven by air.

As shown inFIG. 1, the side rollers8are provided so as to extend downwards at two locations on the outer edge of the end surface32aof the bundle32constituting the compressor31. The side rollers8provided at the two locations on the outer edge of the end surface32aare provided on the outer edge of the end surface32aof the bundle32such that an imaginary line connecting the side rollers8extends horizontally and orthogonally to the lengthwise direction of the rails5a.

The side rollers8are provided with rollers8athat can roll on the rails5a, roller casings8bthat house the rollers8a, and substantially cylindrical leg portions8cthat extend upwards from the roller casings8b.

The rollers8aare wheels that can roll on the rails5a. The rollers8aare housed in the roller casings8b. The rollers8ahoused in the roller casings8bare in contact with the rails5aby, as shown inFIG. 1, protruding downwards from the lower surface of the roller casings8b. The leg portions8c, having a substantially cylindrical shape, are provided on the upper surfaces of the roller casings8bso as to extend substantially vertically upwards.

The upper ends of the leg portions8cof the side rollers8are provided with connectors9that connect the side rollers8and the end surface32aof the bundle32. The connectors9principally have L-shaped fittings9aand cuboid members9b.

One surface of the L-shaped fittings9ais connected to the end surface that is orthogonal to the lengthwise direction of the cuboid members9b, and the other surface of the L-shaped fittings9ais connected to the end surface32aof the bundle32by screws9c. As shown inFIG. 1, the cuboid members9bthat are connected to the end surface32aof the bundle32through the L-shaped fittings9aare provided such that one lengthwise end protrudes outward from the bundle32in the radial direction of the bundle32.

Flange portions9dare provided on the side surfaces which are provided at the lower portions of the cuboid members9b. The lower surfaces of thus-provided flange portions9dare in contact with the upper ends of the leg portions8c.

The end surface (end portion)33aof the casing33at the opposite side in the insertion direction of the bundle32is provided with puller rods11at three locations. The puller rods11are inserted into respective holes (not shown) provided in the end surface33aof the casing33so as to be arranged in the circumferential direction at substantially equal intervals.

The puller rods11extend such that their axes are substantially parallel to the major axis of the casing33. As shown inFIG. 1, the three thus-configured puller rods11extend substantially parallel to the major axis of the bundle32when the bundle32is inserted into and removed from the casing33.

Puller pieces12are respectively provided at intermediate positions on the individual puller rods11that are provided so as to extend substantially parallel to the major axis of the bundle32from the end surface33aof the casing33. The puller pieces12are provided so as to be in contact with the end surface32aof the bundle32.

The puller pieces12are plate-like pieces having a substantially rectangular shape. The puller pieces12having the substantially rectangular shape are provided such that their major axis direction (lengthwise direction of the substantially rectangular shape) extends orthogonally relative to the axial direction of the puller rods11. Protruding portions12athat protrude towards the bundle32are provided on the lower portions of the width end surfaces of the plate-like puller pieces12. Tip portions of the protruding portions12aare in contact with the end surface32aof the bundle32.

The puller pieces12having the protruding portions12aare provided with, in the width direction thereof, through holes (not shown) through which the puller rods11can penetrate the puller pieces12in the minor axis direction (crosswise direction of the substantially rectangular shape). These through holes have an inner diameter substantially larger than the outer diameter of the puller rods11such that the puller pieces12are slidably movable in the axial direction of the puller rods11and have a size that does not allow easy rotation of the puller pieces12around the axis of the puller rods11.

In addition, the bundle support13is provided at the lower part near the end surface33aof the casing33. The bundle support13is provided at the lower portion of the axial end portion of the casing33and supports the bundle32from below. The bundle support13extends substantially parallel to and in substantially the same direction as the axial direction of the casing33from the end surface33aof the casing33. The bundle support13has a shape that is curved along the outer circumferential surface of the bundle32and that is curved in a convex shape towards the downward direction.

The bundle support13has a flange portion13aat the side contacting the end surface33aof the casing33. The bundle support13is connected by fixing the flange portion13ato the end surface33aof the casing33by screws (not shown). In addition, the first end of the travelling rod3mentioned above is in contact with the opposite end of the bundle support13relative to the end of the flange portion13a.

A procedure for removing the bundle32from the casing33of the compressor31using the assembling and disassembling device1with such a configuration will be explained usingFIGS. 2A to 2E.

As shown inFIG. 2A, the compressor31that incorporates the bundle32in the casing33is installed on compressor holders40so as to be supported thereby.

The bundle support13becomes attached on the under portion of the end surface33aof the casing33of the compressor31that is installed on the compressor holders40. Here, the bundle support13is fixed so as to be curved in a shape that is convex in the downward direction.

Next, a hydraulic jack (not shown) is disposed on the opposite-end surface (the end surface of the bundle32in the axial direction, which is the integration direction into the casing33) of the bundle32. By supplying hydraulic pressure to the hydraulic jack disposed on the opposite-end surface (not shown) of the bundle32, the bundle32is pushed in the direction for removing the bundle32(to the left inFIG. 2A). By doing so, as shown inFIG. 2B, the end surface32aside of the bundle32is removed from the casing33. The bundle32removed from the casing33is supported by the bundle support13from below.

Next, as shown inFIG. 2B, the puller rods11become attached on the end surface33aof the casing33. The puller rods11are arranged at three locations on the end surface33ain the circumferential direction at substantially equal intervals.

The puller pieces12become inserted into the respective puller rods11disposed on the end surface33aof the casing33from the extending-end side of the puller rods11(left side inFIG. 2B). At this time, the puller pieces12are inserted into the puller rods11such that their protruding portions12a(seeFIG. 1) are located at the end surface32aside of the bundle32.

The puller pieces12are provided by adjusting their positions on the puller rods11such that their protruding portions12aare in contact with the end surface32aof the bundle32. By doing so, the puller pieces12support the bundle32from the end surface32aside.

Next, as shown inFIG. 2C, the side rollers8become attached, through the connectors9, at two locations on the outer edge of the end surface32aof the bundle32. At this time, the side rollers8are attached such that the rollers8aof the side rollers8(seeFIG. 1) are brought into contact with the rails5a.

Next, as shown inFIG. 2D, the assembling and disassembling device1is provided on the end surface32aof the bundle32.

Here, the assembling and disassembling device1becomes assembled by screwing the travelling plate2to the travelling rod3and by screwing the travelling support6to the second end portion of the travelling rod3. In this way, the first end of the travelling rod3of the assembled assembling and disassembling device1is brought into contact with the bundle support13, and the travelling support6is fixed to the end portions of the two bases5by the bolts6a(seeFIG. 1).

In addition, the travelling plate2screwed on the travelling rod3and the end surface32aof the bundle32become connected by the bolts2b(seeFIG. 1). By doing so, the assembling and disassembling device1is disposed on the end surface32aof the bundle32, and furthermore, the air wrench7becomes attached on the end portion of the travelling rod3.

Lastly, as shown inFIG. 2E, by driving the air wrench7, the air wrench7rotates the travelling rod3clockwise in the direction towards the end surface32aside of the bundle32. By rotating the travelling rod3clockwise, the travelling plate2is moved to the left inFIG. 2E.

Because the travelling plate2is fixed to the end surface32aof the bundle32, as the travelling plate2is moved to the left inFIG. 2E, the bundle32is removed from the casing33. At this time, the individual side rollers8provided on the end surface32aof the bundle32roll on the rails5a, and the individual puller pieces12are moved in a sliding manner to the left inFIG. 2Ealong the individual puller rods11while being in contact with the end surface32a.

In this way, even when ships or Floating Production Storage & Offloading unit experience pitching (vertical movement) during removal of the bundle32from the casing33, because the travelling rod3is screwed into the threaded hole2aof the travelling plate2(seeFIG. 1), it is possible to suppress the movement of the bundle32that is connected to the travelling plate2in the direction perpendicular to its axial direction (the vertical direction inFIGS. 2A to 2E).

Furthermore, even when ships or Floating Production Storage & Offloading unit experience rolling (lateral movement), because the bundle32is supported from below by the bundle support13that has a shape corresponding to the outer circumferential shape of the bundle32, it is possible to suppress the movement of the bundle32in the direction horizontally orthogonal to its axial direction (lateral direction).

Next, a method for inserting the bundle32into the casing33of the compressor31using the assembling and disassembling device1of the present invention will be explained usingFIG. 1.

As shown inFIG. 1, the assembling and disassembling device1, the side rollers8, the bundle support13, the puller pieces12, and so forth are set in place. The air wrench7provided on the end portion of the travelling rod3is driven. By doing so, the air wrench7rotates the travelling rod3anti-clockwise in the direction towards the end surface32aside of the bundle32. By rotating the travelling rod3anti-clockwise, the travelling plate2is moved to the right inFIG. 1.

Because the travelling plate2is fixed to the end surface32aof the bundle32, as the travelling plate2is moved to the right inFIG. 1, the bundle32is inserted into the casing33. At this time, the individual side rollers8provided on the end surface32aof the bundle32roll on the rails5a, and the individual puller pieces12are slidably moved to the right inFIG. 1along the individual puller rods11while being in contact with the end surface32a. The anti-clockwise rotation of the travelling rod3is continued until the bundle32is completely received into the casing33.

As described above, according to the compressor31, the assembling and disassembling device1for the compressor31, and the assembling and disassembling method therefor of this embodiment, the following advantageous effects can be afforded.

The travelling plate (plate-like member)2that has the threaded hole2aand that is fixed to the end surface (end portion)32alocated at the opposite side from the insertion direction, that is the axial direction of the bundle32, and the travelling rod (threaded-rod member)3that is screwed into and penetrates through the threaded hole2aof the travelling plate2are provided. Thus, by rotating the travelling rod3, it is possible to insert and remove the bundle32that is connected to the travelling plate2into and from the casing (compressor casing)33. In this way, because the travelling rod3is screwed into the threaded hole2aof the travelling plate2, even when the bundle32experiences vertical movement due to an external force applied to the bundle32during the insertion and removal work, it is possible to suppress the movement of the bundle32by means of the travelling rod3and the threaded hole2aof the travelling plate2. Therefore, the insertion and removal work of the compressor31can be performed.

The bundle support (support member)13that is curved along the outer circumferential surface of the bundle32is provided below the end surface (end portion)33aof the casing33at the opposite side from the insertion direction. Thus, even when the bundle32experiences lateral movement due to an external force applied to the compressor31during the insertion and removal work, it is possible to suppress the lateral movement of the bundle32by means of the bundle support13. Therefore, the insertion and removal work of the compressor31can be performed.

The bundle32is provided with the travelling-plate attaching hole (plate-like-member attaching hole) for attaching the travelling plate2having the threaded hole2athrough which the travelling rod3penetrates and into which the travelling rod3is screwed when the bundle32is inserted into and removed from the casing33. Thus, even when the compressor31experiences vertical movement during the insertion and removal work, it is possible to suppress the vertical movement of the bundle32. Therefore, it is possible to provide the compressor31that allows the insertion and removal work to be performed easily under the presence of vertical movement.

REFERENCE SIGNS LIST