GB2525513A

GB2525513A - Rotating machine system

Info

Publication number: GB2525513A
Application number: GB1510148.8A
Authority: GB
Inventors: Hiroyuki Matsunaga; Kazutoshi Yanagihara; Taiji Hashimoto; Yohei Tanno; Tomohiro Naruse
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 2013-02-21
Filing date: 2014-02-20
Publication date: 2015-10-28
Also published as: GB2525514A; GB201510150D0; BR112015016513A2; JP2014163391A; WO2014129557A1; JP5883811B2; GB201510148D0; WO2014129235A1; BR112015016514A2

Abstract

At least one base (100) is provided with the longitudinal direction being the direction (X-direction) in which a driving machine placement region (104) and a driven machine placement region (105) are side by side. The base is provided with: main beams (110) for supporting a motor (101), a speed increaser (102) and a compressor (103); and vibration isolators (107-109), which are elastic and have attenuating effects and are disposed in the lower part of the driving machine placement section (104) and/or the driven machine placement section (105).

Description

DESCRIPTION

TITLE OF THE INVENTION: ROTATING MACHINE SYSTEM

TECHNICAL FIELD

(0001] The present invention relates to a rotating machine system.

BACKGROUND ART

(0002] Those cited as background arts ri the present technical field are US. Patent No. 7552903 (Patent Document 1), U.S. Patent No. 4501973 (Patent Document 2), and U.S. Patent No. 6230481 (Patent Document 3). Each of Patent Documents 1 to 3 discloses "a support structure for a device, such as a turbine, a generator, and a driven machine."

PRIOR ART DOCUMENTS

Patent Documents [0003] Patent Document 1: U.S. Patent No. 7552903 Patent Document 2: U.S. Patent No. 4501973 Patent Document 3: U.S. Patent No. 6230481

SUMMARY OF THE INVENTION

Problems to be solved [0004] A floating production, storage and offloading system for offshore oil and gas (Floating Production, Storage and Offloading system, or FPSO) is a system to produce oil and gas at sea, to store produced crude oil in a tank in the system, and to directly offload the oil to a transport tanker.

Such a floating production, storage and offloading system for offshore oil and gas is mounted with a compressor for compressing natural gas and the like. This compressor is used, for example, to boost associated gas separated from oH in a process of producing crude oil for pumping the gas to the and through submarine pipelines.

[0005] Also, the floating production, storage and offloading system for offshore oil and gas, as being a facility that floats on the ocean, is subject to rolling due to waves/winds. Therefore, there is a need for providing a device that suppresses such rolling from being transmitted to a compressor and a driving machine thereof performing rotational movement (rotating machines), to prevent resonance between rolling due to waves/winds and rotating machnes, arid to properly keep the cores of shafts of the rotating machines.

[0006] In this case, since the floating production, storage and offloading system for offshore oil and gas is provided with various equipments and also stores a large amount of crude o Ito be produced, the device suppress nq roHng due to waves/winds from being transmitted to rotaing machines, such as a compressor, is preferably light in weight and smafl fl sze, as much as possible.

The present invention is then made to provide a rotating machine system that is light in weight and smaH in size, and capable of suppressing rofling due to waves/winds from being transmitted to the rotating machines.

Solution to resolve Problems [0007] In orderto resolve the above problems, one aspect of the present invention provides a base including: a driving machine installation zone on which a driving machine is installed; a driven machine installation zone on which a driven machine is installed; at least one first beam that is instaUed in a longitudinal direction, in which direction the driving machire installation Lone and the driven machine nstaUation zone are lined, to support the driving machine and the driven machine; and an anti vibration device that is arranged under at least one of the driving machine installation zone and the driven machine installation zone, and provided with elastic and damping properties.

Advantageous Effects of the Invention O0O8] According to the present invention, a rotating machine system can be provided that is light in weight and smafl in size and capable of suppiessing roling due to waves/winds from being transmitted to rotating machines.

Problems, configurations and advantageous effects other than the above wiU become apparent from description of the foilowing embodiments

BRIEF DESCRIPTION OF DRAWINGS

[0009] FIG. I is a perspective view, as viewed from obftquely downward, of a base for installing rotating machines according to a first embodiment of the present invention.

FIG 2 is a perspective view, as viewed from oblquely forward left of a floating body according to the first embodiment of the present invention.

FIG. 3 is a perspective view, as viewed from obliquely backward right, of the floating body according to the first embodiment of the present invention.

FIG. 4 is a vertical sectional view, as taken in the width direction, of the floating body according to the first embodiment of the present invention.

FIG. 5 is a top view at the base for instalHng rotating machines, according to the first embodiment of the present invention.

HG. 6 is a bottom view of the base for instalUng rotating machines, according to the first embodiment of the present invention, FIG. 7 is a perspective view showing an instaUation example of the base for installing rotating machines, according to the first embodiment of the present invention.

HG. 8 is a perspective view, as viewed from obllquely downward, of the base for instafling rotating machines, according to a second embodiment of the present invention.

FIG. 9 is a top view of the base for installing rotating machines, according to the second embodiment of the present invention.

FIG. 10 is a cross-sectional view of a hollow base portion, taken along a line A-A in FIG. 9.

FIG. 11 is a bottom view of the base for installing rotating machines, according to a third embodiment of the present invention.

FIG. 12 is a bottom view of the base for instafling rotating machines, derived from the first embodiment, according to a fourth embodiment of the present invention, FIG. 13 is a bottom view of the base for installing rotating machines, derived from the second embodiment, according to the fourth embodiment of the present invention FIG. 14 is a bottom view of the base for installing rotating machines, derived from the third embodiment, according to the fourth embodiment of the present invention,

EMBODIMENTS OF THE INVENTION

[0010] Hereinafter, a description will be giver of embodiments according to the present invention, with reference to drawings.

FIRST EMBODIMENT

<Floating body 10> (0011] FIG. 2 is a perspective view, as viewed from obliquely forward left, of a floating body 10 according to a first embodiment of the present invention. FIG. 31$ C perspective view, as viewed from obliquely backward right, of the floating body 10.

FIG. 4 is a vertical sectional view, as taken in the width direction, of the floating body 10. Note that in FIG. 1 and subsequent drawings which wifl be described below, directions X, Y, Z are shown as appropriate. Here, the direction X is a horizontal width direction of the floating body 10, the direction Y is a longitudinal dftection (frontS rear direction) of the floating body 10, and the direction Z is a vertical direction of the floatingbodyl0.

[0012] The floatng body 10 may ne a ship that can float on the water and travel by itself, a floafing equipment that can float on the water but move only by being towed by another vessel, or the like. Typically, the floating body 10 s a floating production, storage and offloading system for offshore oil and gas (Floating Production, Storage and Offloading system, or FPSO). AlternatEvely, the floating body 10 may be a floating storage and offloading system for offshore oii and gas (Floating Storage and Offloading system, or FSO), or the like.

Hereinafter a description will be given of a case where the £loatirlg body 10 is an FPSO. The FPSO is a system that produces on the ocean crude oil and gas, stores the crude oil, which has been produced, once in a tank facilitated by FPSO itself, and directly offloads the crude oil into a transport tanker which shuttles between the land and the system. An FPSO may be sometimes built as a newly built vessel, but is often produced by remodeling a used vessel.

[0013] The floating body 10 serving as an FPSO is loaded with various production facifities 11 for crude oil and gas (the details of which are known iii public, and hence not described herein), and also provided with a residential area 13 for workers, a heliport 14 and so on. The floating body 10 serving as an FPSO moves by itself toward an offshore mining site, where it works as an FPSO in a state of being anchored to a given mooring facility The floating body 10 serving as an FPSO has a large storage tank 12 çFIG 4) provided on the bottom side for storing the crude oil that has been produced [00141 Such a floating body 10 is provided with a compressor 103 (FIG. 1, FIG. 5 etc.) as a part of the production facilities 11. The compressor 103 is used for the purpose of pressurizing assoc ated gas separated from oil during a production process of crude oil to pump the gas to the land through a submarine pipeline, and foi some other purpose Alternatively, the gas pressurized by the compressor 103 may be injected back, like water which is mixed as impurities in the crude oil fed from an offshore oHfield to the floating body 10, into the offshore ofifleld, in order to improve recovery efficiency of the crude oiL [0015] Here1 the floating body 10, as being the faciRty that floats on the ocean, is affected by rofling due to waves/winds. Then, a base 100 for installing rotating machines (hereinafter, referred to as "base 100") (FIG. 1. HG. 5 etc.) is required for suppressing such roVing from being transmitted to rotating machines, such as the compressor 103 performing rotational movement and a motor 101 (FIG. 1, FIG. 5 etc.) that drives the compressor 1 03, and the like. This allows for avoiding resonance between roll'ng due to waves/winds and rotating machines such as the compressor 103 and the motor 101, and to keep the cores of the rotating shafts of the rotating machines from being skewed.

[0016] In this case, the floating body 10 serving as an FPSO is provided with various facilities as described above; such as the production facilities 11, and also with a large storage tank 12 that stores large amount of crude oil to hb produced Therefore, the base 100, as being a device for suppressing rolling due to waves/winds from being transmitted to rotating machines inclusive of the compressor 103, is preferably light in weight and smau in size, as much as possible.

Then, in order to resolve these problems, the floating body 10 has a rotating machine system I of the present embodiment installed thereon that includes the base 100 having a configuration, as described below, arranged with the compressor 103. Those shown within a circle having a reference numeral 111 in each of FIGS. 2 and 3 are rotating machine systems 1, on a magnified scale, mounted on the floating body 10.

[0017] A description will be given in detail below of the rotating machine system I with regard to a configuration, an operation and the like; <Rotating machine 40> [0018] FiG 1 is a perspective view, as viewed from obliquely downward, of the base 100 for installing rotating machires, according to the first embodiment of the present invention. FIG. 5 is a top view of the base 100 for installing rotating machines, according to the first embodiment, and FIG. 6 is a bottom view of the base 100 for installing rotating machines, according to the first embodiment.

[0019] First, the rotating machine system 1 includes: a motor 101 (inclusive of an inverter and the like) that is a driving machine; a step-up gear 102 and a compressor 103 that are driven machines driven by the driving machine such as the motor 101; and auxiliary machines 131 (FIGS. 2 to 4), which are respectively provided on the base 100. The motor 101 (note that an internal combustion engine, such as a reciprocating engne and a gas turbine, may be used as a dnvirig machine instead of S the motor 101) the step-up gear 102, the compressor 103, and the like are aH rotating machines having rotating bodies. Hereinafter, the motor 101, the step-up gear 102, and the compressor 103 are collectively referred to as a rotating machine (FIG 1) <Base 100> [0020] In short, the base 100 is, by taking into account the arrangement and the weight of each aevice of the rotating machne 40 to be installed, properly arranged with beams as intensifying members in the base 100 to aHow for reducing the amount of beams, thereby allowing for reducing a production cost, weight and size.

[0021] First, those arranged on the base 100 are, for example, sequentiafly in the direction X from the rear side of the floating body 0 a driving machine installation zone 104 where driving machines such as the motor 101 are installed; a driven machine installation zone 105 where driven machines driven by the drivLng machines, such as the step-up gear 102 and the compressor 103, are installed: and an auxiliary machine installation zone 106 where the auxiliary machines are installed. Note that in FIG. 1, FIG. 5 and onward, the auxiliary machines 131 (FIGS. 2 to 4) are not shown.

On an upper surface of the base 100, a plate 1001, such as a steel plate with corrosion control treatment, is fixed by welding to beams (110 to 115) to be described later. Note that fixing the plate lOCi to the beams can be done using another technique than welding, such as bolting and riveting, but welding is preferable as continuous fixing being applicable.

[0022] Under the driving machine installation zone 104 where the weight and vibration due to rotational movement of the driving machines, such as the motor 101, are applied, two anti-vibration deviceslO?, 108 are installed for example.

Also, under the driven machine installation zone 105, where the weight and vibration due to rotational movement of the driven machines of the step-up gear 102 and the compressor 103 are applied, one anti-vibration device 109 is installed for example. That is. the base 100 is supported, for example, by three anti-vibration devices 107, 108, 109 in total.

[0023] The anti-vibration devices 107, 108, 109 are composed of springs, dampers and the like. More specifically, the anti-vbrabon devices 107, 108, 109 damp apphed vibration using elastic energy due to rigidity of springs, internal friction of springs, a viscous damping force of the damper, and the hke Note that the anti-vibration devices 107, 108, 109 can be made of material having elastic and damping effects, such as rubber, instead of springs and dampers.

[0024] That is, the motor 101 is generafly heavier than others among equipments installed on the base 100, and subject to larger vibrations due to torque of the motor.

Then a configuration s adopted t nstaH the two anti-vibration devices 107, 108 out of three of those under the driving machine installation zone 104, for receiving weight aid vibration (forced vibration, natural vibration and the like) of the motor 101 to suppress the base 100 from being deformed.

The base 100 is built with a plurality of beams (110 to 115) and the plate I OOi, in order to support respective equipments on the base 100 The beams (110 to 115) aie wide flange beams or the like, and the plate is a steel plate with corrosion control treatment or the like.

<Driving machine installation zone 104 and Driven machine installation zone 105> [0025] The driving machine installation zone 104 and the driven machine installation zone 105 include a main beam 110 as a first beam. At least one main beam 110 is provided in a longitudinal direction, in which direction (direction X) the driving machine installation zone 104 and the driven machine installation zone 105 are sequentially located to support the motor 101, which works as a driving machine, as well as the step-up gear 102 and the compressor 103, which work as dnven machines. In the present example, the main beams 110 are installed in a pair on or close to both side portions of the base 100, respectively, extending in parallel to or along the longitudinal direction of the base 100.

[0026] The main beam 110 is installed so as to load both the driving machine nstallation zone 104 and the driven machine installation zone 105, extending across aH or part of both zones 104 and 105. FIGS. 1, 5 to 6 show a case where the main beams 110 are provided on respective side surfaces at both sides (both sides in direction Y) of the driving machine installation zone 104 and the driven machine installation zone 105.

The anti-vibration devices 107, 108 as described above are attached to the main beams 110 on both the side surfaces.

[0027] In the driving machine instaflation zone 104 and the driven machine irstallation zone 105, equipments having large weight, such as the motor 101 of a driving machine and the compressor 103 of a driven machine, are installed. Then, in order to suppress deformation caused by tnese devices in the gravity direction of (he base 100 (downward along the 7-axis in FIG. 1), the main beam 110 has higher rigidity, as compared with each of the other beams (to be described later).

Note that in view of rolling of the base 100, the inertial force of the rolling due to the base 100, the rotating machine 40, and the like affect not only the base 100 in the gravity direction (downward along the Z axis) but also the base 100 in the width direction (in a transverse direction of the baselOO, or in the Y-axis direction), and this requires that the rigidity of the base 100 in the width direction needs to be improved as well.

[0028] In view of this, in the first embodiment, the main beams 110 of high rigidity are installed on both side surfaces of the base 100, respectively allowing this structure to improve bending rigidity of the entire base 100 in the width direction (in the transverse direction of the base 100, or in the Y-axis direction to suppress deformation of the base 100 in the width direction.

Beams other than the main beams 110 may be installed in the driving machine installation zone 134 and the driven machine nstalation zone 105, including main machine support beams for 111, 112 that extend in any direction to form second beams (second main machine beams).

[0029] The main machine supDort beams may be installed as appropriate as described below, by taking nto account the atrangernent and weight of the respective equipments in the driving machine instalation zone 104 and the driven machine installation zone 105.

For example, as shown in FIG. 1, the main machine support beams 111 may be provided in the driving machine installation zone 104 below the motor 101, as extending in the width direction of the base 100 (in the transverse direction of the base 100, or in the Y-axis direction), where the support beams 111 receive the weight of the motor 101.

A main machine support beam lila is mounted with the anti-vibration device 109, as described above, in the center, where the support beam lila is provided in the driven machine instaflation zone 105, as extending in the width direction of the base (in the transverse direction of the base 100, or in the (-axis direction).

[0030] In addition, two main machine support beams 112 or the like are installed that extend from a point, where the anti-vibration device 109 is attached, in the ciriven machine instaUation zone 105 under the compressor 103 obliquely toward the main beams 110, as viewed Iron above, so that the distance from each other grows in proportion to the amount of extension, and are fixed to the main beams 110, respectively. More specificafly, one end of the main machine support beam 112 is rigidly fixed to the main machine support beam lila in the center, where the anti-vibration device 109 is attached by welding, boting, or the hke Further, the other end of the main machine support beam 112 is rigidly fixed to the right or left main beam 110 by welding, bolting, or the like.

[0031] As a result, the two main machine support beams 112 extend from the point (at a lower portion on an edge of the driven machine installation zone 105 in the longitudinal direction and in the center in the width direction), where the anti-vibration device 109 is attached, obliquely toward the main beams 110, respectvely, with the distance from each other growing in proportion to the amount of extension, as viewed from above, and are fixed to the right and left main beams 110. This allows for increasing rigidity against a load in the X-Y plane direction (horizontal direction of the base 100) and twisting in the X-Y plane direction about a virtual axis perpendicular to the x-y plane in each of the driving machine installation zone 104 and the driven machine instailaton zone 105 [0032] Besides, the main machine support beams can be extended to arrange in any direction in accordance with the weight and the arrangement of the driving machines and the driven machines This allows for installing appropriate beams, depending on the weights and arrangenent of the driving machine and the driven machines.

As a large part of the rigidity required for the driving machine installation zone 104 and the driven machine installation zone 105 can be provided by the main beams 110, the main machine support beams 111,11Th 112 may have lower nqidity than the main beams 110.

(0033] In otherworos, the man machine support beams 11, lila 112 may be reduced in thickness or in size for decreasing the section modulus arid the rigidity.

This auows for reducing the main machine support beams 111 lila, 112 in size to save the amount of matenal and 4rien aliows for reducng a production cost of raw matehal and the weight of the beams, as compared with a case of aD the beams in the base 100 having the same ngidity as the main beams 110 <Auxiliary machine installation zone 106> (0034] In the auxihary machine instaation zone 106 where the auxfliary machines i3i (FIGS. 2to 4, not shown in FIGS. 1, 5to 7, are instaHed other than the driving machines and the driven machines, auxiliary machine supportbeams 113, 114, 115 are installed, as shown in FIGS. 1, 5, 6, that extend in any direction to serve as second beams (second auxHiary machine beams). The auxiliary machine support beams 113, 114, 115 are suitablyinstafled, asdescribed below, hytaking into account the arrangement and the weight of respective equ pments in the auxihary machine instauation zone 106.

[0035] In general, the auxiliary machine 131 is lighter than the main machine such as the motor 101 and the compressor 103, then the auxUiary machine installation zone 106 is subject to a small load from the auxiliary machine 131.

This allows each of the auxifiary machine support beams 113 installrJ on both side surfaces (inclusive of t1-e eic'nit of both side surfaces) of the auxhary machine installation zone 106 not to have the high rigidity such as that of the main beam 110, but to have low rigidity. Note that FIGS. 1, 5. 6 show a case in which the auxiliary machine support beams 113 are installed on both side surfaces of the auxiliary machine installation zone 106.

That is, the auxiliary machine support beams 113 may be instaHed, for example, to join with the main beams 110, respectively, so as to extend on the extension of the main beams 110 in accordance with the footprint of the auxiliary machines 131.

[0036] Other auxiliary machine support beam installed in the auxiliary machine installation zone 106 can be, for example, as shown in FIGS. 4 and 6, the auxiliary machine support beam 114 that extends in the Iongiudiral drection substantially at the center, in the width direction of the auxihary macnine ins4aflation zone 106 of the base 100. In addition, other auxiliary machine support beam can be two auxiliary machine support beams 115 that extend from the auxiliary machine support beam 114 obliquely toward the respective auxiliary machine support beams 113 at both sides, as viewed from above. Besides, the auxiliary machine support beam 114 and the auxiliary machine support beams 115 are installed in a trifurcate shape as viewed from aflove, in support of the auxiiary machine installation zone 106 And a start point of the tifurcate shape is located between the anti-vibration device 109, instafled under the driven machine installation zone 105, and the auxiliary machine 131 (FIGS.

2 to 4) in the auxiliary machine installation zone 105. This allows the starting point of the trifurcate shape to be subject to both loads of the weight of the auxiliary machines 131 and the load supported by anti-vibration device 109.

[0037] In addition, the auxiliary machine support beams 113 at both sides and the auxiliary machine support beam 114 in the center, all extending in the longitudinal direction, are connected with two auxiliary machine support beams 115 that extend from the auxiliary machine support beam 114 in the center obliquely toward the respective auxiliary machine support beams 113 at both sides, as viewed from above..

This allows for forming support members in the directions X and Y in the auxiliary machine irstallation zone 106 only with the auxiliary machine support beams 15 extending in the X-Y plane direction. That is, the auxiliary machine support beams can be extended as support members in the directions X and Y in the auxiliary machine instauation zone 106 to add rigidity in the directions X and Yin the auxiliary machine installation zone 106.

(0038] Note that the auxiliary machine support beams 115 extending in the X-Y o:ane duection can additionally,ncrease rigdity against twisting deformation around the horizont axis in the XY plane direction. Further, the auxiliary machine support beam 114 in the center, by passing under the auxiliary machines 131 (FIGS. 2 to 4) in the auxiliary machine instaflafion zone 106, can effectively support the weight of the auxiliary machines 131, Besides, the auxiliary machine support beams 113 114, 15 can be arranged to extend in ry direction according to the weight and arrangement of the auxil aiy machines 131,FIGS. 2to4). This allows for installing suitable beams in accordance with the weight and arrangement of the auxiliary machines 131 in the auxiliary machine installation zone 106.

[0039] In addition, assuming that the beams are installed so as to be located below all the equipments that are installed in the auxiliary machine installation zone 106, installing bean's in an oblique direction like the auxiliary machine suoport beams 115, for example, can secure desired r gidity w th a smaller number of members than simply installing beams in a grid pattern in the directiors X and Y, thereby allowing for reducing the amount of beams. This allows the base 100 to have lower producfion costs such as of raw material arid in assembling, and a lower weight.

The auxiliary machine support beam 113 may be connected with the main beam and extend in any direction of the base 100 in the auxiliary machine installation zone 106. This allows the auxiliary machine support beams 113, in conjunction with the main beams 110, to support the respective loads in the driving machine installation zone 104, the driven machine installation zone 105, and the auxiliary machine installation zone 106.

[0040] Further, the auxiliary machine support beams 113, 114, 115, similarly to the main machine support beams 111, lIla, 112, can have lower rigidity than the main beam 110, to reduce sizes related to the section modulus indicative of rigidity, such as the thickness and shape, to save material. This allows for reducing the amount of beams, as compared with a case of all the beams in the base 100 having the same rigidity as the main beams 110, thereby reducing the production costs, such as of raw material and in assembling, of the beams and the weight thereof.

[0041] The configuration as described above allows for arranging a proper number of beams having proper ngidity at proper positions and in proper directions in each of the driving machine installation zone 104, the driven mach'r'e installation zore 105, and the auxiliary machine installation zone 106. OpUmizing beams arranged in the entire base 100 according to the driving machines, the driven machines, and the auxiliary machines, allows the base 100 to have the number of production steps, the number of members, and sizes reduced with respect to the beams, thereby allowing for reducing the production cost of the beams and the weight of the base 100 to have the base 100 smaller in size.

<Installation of Base 100> [0042] FIG. 7 is a perspective view showing an installation example of the base 100 for installing rotating machines according to the first embodiment of the present invention.

For example, the anti-vibration devices 107, 108, 109 of the base 100 are installed at respectve positions of the anti-vibration device installation portions 121, 122, 123 of a given mounting surface 31 on the floating body 10. More specifically, the anti-vioration devices 107, A08 109 are fixed to the anti-vibraion device rstallation portions 121, 122, 123, respectively, by way of fastening with bofts, welding or the like.

[0043] F!xing the base 100 firmly on the mounting surface 31 in this way can prevent the base 100 from beng misaligned on the ounting surface 31 while the rotating machine 40 runs on the floating body 10, Note that H-shaped steel can be generally used for the beams (110, 111, lila, 112, 113 114 115 to be installed in resoectivezones of the driving machine installation zone 104, the driven machine installation zone 105, and the auxiliary machine installation zone 106 according to the first embodiment, but various steel having other shape, such as I-shaped steel and T-shaped steel, or flat plates may also be used.

In addition, each of the main beams 110, the main machine support beams 111, 11Th, 112 and the auxiliary machine support beams 113, 114,115 may have different rigidty [0044] According to the present embodiment as described above, the two anti-vibration devices 107 and 108, for example, are provided under the driving machine installation zone 104 of the base 100, and one anti-vibration device 109, for example, is provided under the driven machine installation zone 105. These anti-vibration devices 107, 108, 409 can suppress rolling due to waves/winds from being transmitted to the rotating machines 40 and the like. This allows for avoiding resonance between rolling due to waves/winds and the rotating machines 40, such as the compressor 103 and the motor 101, and also allows for keeping the core of the rotating shaft of each of the rotating machines 40 in a oroper positon so as not to be skewed [0045] In addition, as described above, the base 100 is configured with the main beams 110, the main machine support beams 111, lIla, 112, the auxiliary machine support beams 113, 114, 115 and the like. The arrangement and effects of each of these beams are also as defined above Thus, respective beans can tirmly support the driving machines such as the motor 101, the driven machines such as the step-up gear 102 and the compressor 103, and the ike.

Moreover, the main machine support beams ill, lila, 112 and the auxiliary machine support beams 113! 114, 115 have lower rigidity than the main beams 110, and this ailows for reducing those beams in weight to have the base 100 reduced in weight and size, as well as in production cost. This is preferable because the base 100 is required to be Hghter in weight and smaller in size when mounted on an FFSO or the ike.

SECOND EMBOD!MENT [0046] FIG. 8 is a perspective view, as viewed from obliquely downward, of a base for installing rotating machines according to a second embodiment of the present invention, FIG, 9 is a top view of the base 200 for installing rotating machines according to the second embodiment.

The base 200 for installing rotang machines (hereinafter, referred to as "the base 200") according to the second embodiment is added with a hollow base porflon 217 between a drMng machine installation zone 204 and a driven machine installation zone 205, to have an auxihary machine 231 to be installed in the hollow base portion 217.

In the base 200 according to the second embodiment, those elements having the same configuration and function as the base 100, as shown in FIGS. 1 and 5 toY for the first embodiment which have already been described, are illustrated by changng numerals in the lOOs in the first embodiment to numerals in the 200s, with detailed

description being omitted.

[0047] FIG. 10 is a cross-sectional view of the hollow base portion 217 as taken along a line A-A in FIG. 9. The hollow base portion 217 is provided between the driving machine installation zone 204 and the driven machine installation zone 205, to have the auxiliary machine 231 installed at a position which does not interfere with a connection shaft 201j, connecting a driving machine such as a motor 201 and a driven machine such as a step-up gear 202 and a compressor 203, that is, under the connection shaft 201j This means that a position of the bottom of the auxiliary machine 231 is lower than a position of the upper surface of a plate 200i.

[0048] The lower side of the connection shaft 201j is effectively utilized as an instalation zone for the auxiliary machine 231, to allow for reducing an instaflation zone for the auxiliary machine 231, which zone has been additionally required and arranged in an auxiliary machine installation zone 206 (instaliation space for the auxiliary machine 231), to have the entire base 200 smaHer in size and Ughter in weight (in this case, the auxiUary machine installation zone 206 Hustrated in FIGS. 8 and 9 are unnecessary) AlternatveFy, the auxiliary machine irstallation zone 206 may be effectiv&y utiflzed for installing other machine(s) than the auxiliary machine 231.

[0049] ri addition, instafling the auxiliary machine 231 in the hoflow base portion 2 7, that is in a lower position within the base 200, can lower a center-of-gravity position of the auxiliary machine 231 with respect to that of the base 200, as compared with the case of installing the auxiUary machine 231 on the base 200.

This lowering the center-of-gravfty position of the auxihary machine 231 within the base 200 aliows for reducing the length of the moment arm of the auxiliary machine 231 with respect to the base 200. Then, the moment applied from the auxiliary machine 231 to the base 200 can be decreased to suppress the base 200 from being deformed [0050] Note that the hollow base portion 217 causes a change that a plate 200i (corresponding to the plate lOOi in the first embodiment) provided on the upper surface of the base 200 is not required in the hollow base portion 217. This makes the rigidity of the base 200 itself to be decreased, but instafling the auxiliary machine 231 in the hollow base portion 217 adds the rigidity of the auxiliary machine 231 to the base 200 Further. if the rigidity of the hollow base portion 217 is insufficient, support beams 211k (FIG. 8), as third beams, may be added on the outer peripheral portion surrounding the hollow base portion 217 and/or on the bottom surface of the hollow base portior 217 For support beams, H-shaped steel, steel having vanous types of other shapes, such as an I-shape and a T-shape, or a flat plate may be used.

Note that the hollow base portion 217 may be arranged so as to penetrate the base 200 in a height direction (i-axis direction), or may be arranged up to a certain level above the base 200 in the height direction, as long as the auxiliary machine 231 does not interfere with the connection shaft 201].

THIRD EMBOMENT

[0051] FIG. 11 is a bottom view of a base 300 for installing rotating machines according to a third embodiment of the present invention. l6

In contrast to the bases 100, 200 in the first and second embodiments where beams are arranged at symmetrical positions relative to longitudinal centerlines lODe, 200c of the bases! the base for instahing rotating machines 300 (hereinafter, referred to as "base 300") according to the third embodiment is configured to have beams arranged at asymmetrical positions.

In the base 300 in FIG. 11, those elements having the same configuration and function as the base 100, as shown in FIGS. 1 and 5 to 7 which have already been described, are illustrated by changing numerals fri the lOOs to numerals in the SODs,

with detailed description being omitted.

Respective equipments (driving machines, dnven machines, auxiliary machines) installed on the base 300 rarely have the center of gravity distnbuted symmetrically with respect to a longitciinal centerline 300c of the base, and the weights of the respective equipments are different. Therefore, in general, the base 300 is subjected to asymmetrical loads with respect to the longitudinal centerline 300c of the base.

[0052] For example, as shown in FIG. 5, where the motor 101 and the compressor 103 are connected via the step-up gear 102, even f the motor 101 is arranged on ft'e longitudinal centerline 10Cc of the base, the step-up gear 102 causes a motor shaft axis 101 c and a compressor shaft axis 1 03c to be misaligned Similarly, as shown in FIG. 9, where the motor 201 and the compressor 203 are connected via the step-up gear 202, even if the motor 201 is arranged on the longitudinal centerline 200c of the base, the step-up gear 202 causes a motor shaft axes 201c and a compressor shaft axis 203c to be misaligned.

[0053] Accordingly, even if the motors 101, 201 are arranged on the longitudinal centerlines lOOc, 200c of the bases, the compressors 103, 203 may be arranged in respective positions offset from the longitudinal centerlines lObe, 200c of the bases That is, center-of-gravity positions of the compressors 1 03, 203 are offset from the longitudinal centerlines 1 DOe 20Cc of the bases, and then accordingly the beams constituting the bases 100, 200 need to be arranged at asymmetrical positions with respect to the longitudinal centerlines lOOc, 200c of the bases.

[0054] In the third embodiment shown in FIG. 11, a case is shown where a center-of-gravity position 304G of the entire equipments in a driving machine installation zone 304 is located above the longitudinal centerline 300c of the base. In addition, in the third embodiment shown in FIG. 11, a case is shown where a center-of-gravity posiflon 3050 of the entire equipments in the driven machine instaflation zone 305, and a center-of-gravity position 3060 of the entire equipments in the auxiUary machine instauatiori zone 306 are located b&ow the hngitudinal centerune 300c of the base.

[0055] Then, in the driving machine instaflation zone 304, a main machine support beam 321 is arranged acorthng to tne center-of-gravity position 3046 so as to increase the rigidity of a portion above the longitudinal centerline 300c of the base.

that is by taking into account the center-of-gravity postion 3040 of the drivng machine installation zone 304, where the driving machines are instaHed and the weights of the dr ving machines, the main machine support beam 321 havng proper rigidity (size) is arranged in an as)'mmet@ ca posmon with respect to the longitudinal centerline 300c of the base. Thus, as the main machine support beam 321, a beam is arranged that has pooer rig dity to support the weights of the driv ng machines or the weight at the center-of-gravity position 304G.

[0056] In addition, in the driven machine instaflation zone 305, a main machine support beam 312c is arranged according to the center-of-gravity position 3050 so as to increase the rigidity of a portion below the longitudinal centerline 300c of the base, That is, by taking into account the center-of-gravity position 3050 of the driven machine instaflation zone 305, where the driven machines are instafled and the weights of the driven machines, the main machine support beam 312c hav'ng proper rigidity (size) is arranged in an asymmetrical position with respect to the long tudinal centerline 300c of the base.

Further. in the auxiliary machine installation zone 306, auxiliary machine support beams 314, 315 are arranged according to the center-of-gravity position 3063 so as to increase the rigidity of a portion below the longitudinal centerline 300c of the base.

That is, the beams 314, 315 are arranged in asymmetrical positions with respect to the longitudinal centerline 300c of the base, wherein the beams 314, 315 have ptoper rigidity to supoort the center-of-gravity pasitior 3060 as weU as to support the weights of the auxiliary machines.

[00571 This arranging the beams 321312c 314, 315 having proper sizes in asymmetrical positions, by taking into account the respective center-of-gravity positions 3040 3053 3060 ano the respective weignis of the drying machines, the driven machines, and the auxiliary machines, allows the base 300, as compared with arranging beams in symmetrical posftons with respect to the Iongitudina centerhne 300c of the base, to have rigidity improved and members such as extra beams eliminated. Then, the weight of the base 300 can be reduced.

(0058] Note that even in the structure of the base 300, main beams 310 and main machine support beams 311, 312 are respectively instafled in the driving machine instaflation zone 304 and the driven machine instaflation zone 305. n addition, auxiliary machine support beams 313 are instaHed in the auxiliary machine instaliation zone 306. Further, the rigidity of the main machine support beams 311, 312 and the auxiary machine support beams 313 may be ower than the rigidity of the main beams 310. Furthermore, the rigidity of the main machine support beams 321,31 2c and the auxhary machne support beams 314, 315 may be lower than the rigidity of the main beams 310.

FOURTH EMBODIMENT

(0059] HG. 12 is a bottom view of a base for instaffing rotating machines 1 OOA, derived from the first embodiment, according to a fourth embodiment of the present invention.

The base for nstaUing rotating machines IOOA (hereinafter, referred to as base 100k'), derived from the first embodiment, according to the fourth embodiment has main machine support beams 112a instafled as foUows. That is, two main machine support beams 1 12a extend fran, a point below the compressor 103, where the anti-vthration device 109 s attached, obhquely toward ant-vibralon devces 107, 108 on the respective main beams 110, with the distance from each other growing in proportion to the amount of extension, as viewed from above. Then, the main machine support beams I 12a are linked to positions where the anti-vibration device 107 and the anti-vibration device 108 are respectve!y attached.

Other corfgurat!ors of the base bOA are sim'ar to those of the base 100 n the first embodiment, as shown in FIGS. 1, 5 to 7, and are then denoted by the same

numerals, with detailed description being omitted.

(0060] In this way, the base IOOA is configured so that the main machine support beams 11 2a couple the anti-vibration devices 107, 108, 109 which support the base IOOA at three points. Then, the base 100A can be implemented that has improved rigidity against a bad in the X-Y plane direction (horizontal direction of the base bOA) of the driving machine instaHation zone 104 and the driven machine instaflation zone 105, and against twisting in the X-Y plane direction about an axis perpendicular to the X-Y plane.

L0061] FIG. 13 is a bottom view of a base for installing rotating machines 200A, derived from theY second embodiment, according to the fourth embodiment of the present invention.

The base for nstafling rotating machines 200A (hereinafter, referred to as base 200K), derived from the second embodiment, according to the fourth embodiment has main machine support beams 212a installed That s, two main rrachne support beams 21 2a extend from a point below the compressor 203, where the anti-vibration device 209 is attached, obllqu&y toward anti-vibration devices 207, 208 on the respective rain boams 210, with the distance from each other growing in proportion to the amount of extension, as viewed from above. Then, the main machine support beams 212a are inked to positions where the anti-vibration device 207 and the anti-vibration device 208 are respectively attached.

Other configurations of the base 200A are similar to those of the base 200 in the f rst embodiment, as shown in FIGS 8 to 10, and aie then denoted by the same

numerals, with detailed description being omitted.

(0062] In this way, the base 200A is configured so that the main machine support beams 21 2a couple the anti-vibration devices 207, 208, 209 which support the base 200A at three points. Then, the base 200A can be implemented that has improved rigidity against a cad in the Xi plane direction (horizontal direction of the base 200A of the driving machine installation zone 204 and the driven machine installation zone 205. and against twisting in the X.-Y plane direction about an axis perpendicular to the X-Y plane.

[0063] FIG 14 is a bottom view of a base for install ng rotating machines 300A derved from the third emoodirnent, accordirg to the ourth embodiment of the present invention.

The base for nstahng rotat ng machnes 300A (hereinafter, referred to as base 300k'), derived from the third embodiment, according to the fourth embodiment has main machine support beams 312a installed. That is, two main machine support beams 312a extend from a point below the compressor 303, where the anti-vibration device 309 is attached, obliquely toward anti-vibration devices 307, 308 on the respective main beams 310, with, the distance from each other growing in proportion to the amount of extension, as viewed from above. Then, the main machine support beams 312a are linked to positions where the anti-vibration device 307 and the anti-vibration device 308 are respectively attached.

[0064] Other configurafions of the base SODA are similar to those of the base 300 in the third embodiment, and are then denoted by the same numerals, with detailed

description being omitted,

n this way, the base 3ODA is configured so that the main machine support beams 312a couple the anti-vibration devices 307, 308, 309 which support the base 300A at three poults, and then, the base 300A can be mplerented that has niproved rigdity against a oao in rhe X-Y pare chrection (honzonta! direclion of the base 300A) and twistng rn the X-Y p'ane direct'cn about a virtue! axs perpenthcular to tne X-Y p'ane in each of the drMng machine instaUation zone 304 and the driven machine instaflation zone 305.

[0065] Note that ul the irst to fourth embochments as described above, active an4-vibration mounts and/or semi-active anti-vibration mounts may be adopted for the anti-vibration devices 107, 108, 109. For example, an anti-vibration device may be configured so as to detect a vibration by a load sensor and to canc& the vibration by an electromagnetic actuator.

In addition, in the first to fourth embodiments, various configurations have been individuafly described, however these configurations may be combined as appropriate to configure a desirable one.

Hereinabove, various embodiments of the present invention have been described, however various modifications and changes can be made within the scope of the present invention. That is, embodiments of the present invention can be changed in any way, as apptprate, w!thv' a spirit of the irwention

DESCRIPTION OF REFERENCE SIGNS

[0066] 100, 200, 300, bOA, 200A, SODA Base for instafling rotating machines (Base) 101, 201, 301 Motor (Dnvuig machne) 102, 202, 302 Step-up gear (Driven machine) 103, 203, 303 Compressor (Driven machine) 104, 204, 304 Driving machine instaflation zone 105, 205, 305 Driven machine instaflation zone 1'36, 206, 306 Auxiliary machine nstaflation zone 107, 108, 109, 207, 208, 209, 307, 308, 309 Anb-vibration devce 110,210,310 Mainbeam(Firstbeam) 111, 112, 211, 212, 311, 312 312r Main machine support beam (Second beam, Second main machine beam) 113, 114, 115, 213, 214, 215, 313, 314, 315 Auxffiary machine support beam (Second beam, Second auxffiary machine beam) 131, 231 AuxUlary machine 211k Support beam (Third beam) 215 Hoflow base porfion (Hoflowporflon) 300c Longitudna centerUne

Claims

CLAIMS1 A rotating machine system comprising: a base that is installed on a floating body which floats on the water; a driving machine, and a driven machine that is a rotating machine driven by the driving machine, wherein the base includes: a driving machine installation zone in which the driving machine is instafled; a driven machine nstallation zone on which the driven machine is installed; at least one first beam that is instaUed in a longitudinal direction, in which direction the driving machine installation zone and the driven machine installation zone are lined, to support the driving machirie and the driven machine; and an anti-vibration device that is arranged under at least one of the driving machine installation zone and the driven machine installation zone, and provided with elastic and damping properties.
2. The rotating machine system according to claim 1, wherein the base includes the first beams on respective side surfaces at both sides of the driving machine installation zone and the driven machine installation zone
3. The rotating machine system according to claim 2, wherein the base further includes: at least one second beam that is additional to the first beam and has lower rigidity than the first beam.
4. The rotating machine system according to claim 3, further comprising: an auxiliary machine that is additional to the driving machine and the driven machine, wherein the base further includes: an auxiliary machine installation zone on which the auxiliary machine is installed.5 The rotating macnine system according to claim 4 wherein the second beam is either one of a second main machine beam that extends in any direction in the driving machine installation zone and the driven machine instaflation zone, and a second auxiliary machine beam that extends in any direction in the auxiliary machine instaflation zone.6. The rotating machine system according to claim 4, wherein the second beam is either one of a second main machine beam that extends in any drection n the drivng machine instaflahon zone and the dnver machine installation zone, and a second auxiliary machine beam that extends in any direction in the auxiliary machine instaflation zone, and if the second beam is the second main machine beam, two second beams extend from a starting point, at a lower portion on an edge of the driven machine instaflation zone in the longitudinal direction and in the center in the width direction, obhquely toward two first beams, respectively, with the distance from each other growing in proportion to the amount of extension, as viewed from above, and are fixed to the two first beams.7. The rotating machine system according to claim 4, wherein the second beam is either one of a second main machine beam that extends n any direction in the driving machine nstaflahon zone and the dnven machine instailation zone, and a second auxiliary machine beam that extends in any direction in the auxiliary machine instaflation zone, and if the second beam is the second main machine beam, second beams extend in the width direction of the base at a lower porfion of the driving machine instaflation zone.8. The rotating machine system according to claim 4, wherein the second beam is either one of a second main machine beam that extends in any direction in the driving machine installation zone and the driven machine instaflation zone, and a second auxiliary machine beam that extends in any direction in the auxiliary machine installation zone, and if the second beam is the second auxiliary machine beam, second beams are arranged in the auxiliary machine instaflation zone, and instaued to join with the first beams to extend on the extension of the first beams, respectively.9. The rotating machine system according to claim 4, wherein the second beam is either one of a secono main machine beam that extends in any direction in the driving machine installation zone and the driven machine instaflation zone, and a second auxihary machine beam that extends in any direction in the auxiHary machine instaflation zone, and if me second beam is the second auxihary machine oeam second beams are configured in a trifurcate shape, as viewed from above, with one beam extending in the longitudinal direction substantially at the center of the base in the width direction, and two beams extending obllquely in a right and left directions from a starting point on the one beam, with the distance from each other growing in proportion to the amount of extension.10. The rotating machine system according to claim 4, wherein the second beam is either one of a second main machine beam that extends in any direction in the driving machine installation zone and the driven machine instaflation zone, and a second auxhary machine beam that extends in any direction in the auxiliary machine instaflation zone, and if the second beam is the second auxiliary machine beam, second beams are configured in a trifurcate shape, as viewed from above: with one beam extending in the longitudinal direction substantially at the center of the base in th.e width direction, arid two beams extending obliquely in a right and left directions from a starting point on the one beam, with the distance from each other growing in proportion to the amount of extension, wherein the starting point is located, as viewed from above, between the anti-vibration device, instaled undei the driven macn ne nstauatcn zone and an auxtiary machine in the auxiliary machine installation zone.11. The rotating machine system according to claim 4, wherein the second beam is either one o a second main machine beam that extends in any direction in the driving machine installation zone and the driven machine installation zone, and a second auxihary machine beam that extends in any direction in the auxiliary machine installation zone1 and if the second beam is the second auxiliary machine beam, second beams are corfiguied in a tnfurcate shape as viewed from above, witn one beam extcndng in the longitudinal direction substantially at the center of the base in the width direction, and two beams extending obliquely in a right and left directions from a starting point on the one beam, with the distance from each other growing in proportion to the amount of extension, wherein the second auxiliary machine beams run b&ow an auxiUary machine in the auxihary machine installation zone.12. The rotating machine system according to claim 4, wherein a hollow base portion is provided between the driving machine and the driven machine, and the auxiliary machine is instafled in the hoUow base potion instead of the auxiUary machine instaHation zone.13 The rotating machrie system accodng to clam 4, wherein a hollow base portion is provided between the driving machine and the driven machine, and the auxiliary machine is installed in the hoHow base potion, wherein third beams are added, for supporting the hoflow base portion, on the outer penpberal porton surroundng the hollow base poron and/or on the bottom surface of the hollow base portion.14. The rotating machine system according to claim 3, wherein the first and second beams are arranged in asymmetrical positions with respect to a transverse and longitudinal centerlines of the base.15. The rotating machine system according to claim 1 wherein the driven machine includes a compressor.