EP1692398B1 - Stabilising means for vibrationally stabilising a long shaft - Google Patents
Stabilising means for vibrationally stabilising a long shaft Download PDFInfo
- Publication number
- EP1692398B1 EP1692398B1 EP04797438A EP04797438A EP1692398B1 EP 1692398 B1 EP1692398 B1 EP 1692398B1 EP 04797438 A EP04797438 A EP 04797438A EP 04797438 A EP04797438 A EP 04797438A EP 1692398 B1 EP1692398 B1 EP 1692398B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate parts
- long shaft
- stabilising
- stabilising means
- support element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
- F04D29/044—Arrangements for joining or assembling shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2210/00—Working fluids
- F05D2210/10—Kind or type
- F05D2210/11—Kind or type liquid, i.e. incompressible
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/30—Retaining components in desired mutual position
- F05D2260/31—Retaining bolts or nuts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S415/00—Rotary kinetic fluid motors or pumps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S417/00—Pumps
Definitions
- the present invention relates to stabilising means for vibrationally stabilising a long shaft, preferably the long shaft comprises a rotating shaft driving a submerged pump.
- the invention also relates to a method for manufacturing such a stabilising means.
- Storing explosive media, e.g. gas or oil, in ships' tank is regulated by safety regulations such as those of the International Maritime Organisation (IMO) in order to minimise the risk of explosion during operation.
- IMO International Maritime Organisation
- Hydraulic motors have the drawback that accidental leaks will contaminate the content of the tank. Hydraulic systems also require a complicated supply of high pressure oil.
- a common solution for driving a pump within the tank is to apply an electrical motor on top of the tank and mounting a long rotating shaft between the electrical motor and the pump inside the tank.
- Such pumps are known as deep well pumps.
- the rotating shafts can be up to 30 m long and require special considerations with regard to support and stabilisation.
- the rotating shaft will be surrounded and supported by a concentric long support shaft.
- the support shaft is in turn fixed by intermediate support means, e.g. a pipe holder or clamp, to a parallel gas/oil pipe and/or a support tube surrounding both the support shaft and gas/oil pipe.
- intermediate support means e.g. a pipe holder or clamp
- the support shaft can also be fixed to the walls of the tank.
- the support shaft needs to be fixed due to the vibrations induced by the rotating shaft. Movement of fluids in the tank known as sloshing may also generate forces that require the shaft to be fixed.
- Another solution for fixing the intermediate support means on the support shaft is to use flanges of the support shaft.
- the support shaft typically consists of smaller tube pieces joined by flanges.
- the flanges may additionally comprise means for fixing the intermediate support means. This solution limits the available fixation positions of the intermediate support means to the flanges and complicates design of the system.
- US 5017104 discloses a stabilizer for vertically driven pumps in which a bearing is supported on the drive shaft approximately half way between the pump and the motor.
- the stabilizer bearing prevents bowing of the drive shaft which would cause considerable wear on the pump packing resulting in leaks.
- the bearing of the invention is then slipped over the shaft to a point as near halfway between the pump and motor as possible.
- the arms should be extended and secured well enough to determine the location to drill holes in the legs of the frame to accommodate bolts to secure the end of all four arms.
- US 2002/085776 discloses an improved flexible support for a steady bearing in rotational contact with the surface of a shaft allows the bearing and housing to substantially track the contact surface of an impeller shaft when the shaft is subject to elastic deflection during operation.
- the flexible support employs a flexible disc pack, which is comprised of a plurality of thin, flexible disc elements in a stacked arrangement.
- the disc pack is mounted to a support ring and is also mounted to the bearing housing such that the bearing housing and other bearing elements are capable of deflection to substantially align with the axis of the impeller shaft when the shaft deflects.
- a stabilising means for vibrationally stabilising a long shaft comprising:
- stabilising means that are easily dlsplaceable in the longitudinal direction of the long shaft. This is due to the fact that the optimal vertical positions for the stabilising means to dampen vibrations of the long shaft often may vary from estimates made beforehand. Thus, the possibility to easily displacing the stabilising means will increase the potential for damping the vibrations of the long shaft.
- the stabilising means may be applied in off-shore and maritime applications, as well as in on-shore applications.
- the stabilising means may be applied in off-shore and maritime applications such as liquid gas tankers, chemical tankers, fuel production and storage off-shore facilities (FPSO) etc.
- FPSO fuel production and storage off-shore facilities
- the stabilising means further comprises at least one support element being mounted on at least one of the plate parts, the at least one support element being adapted to establish contact between the at least two plate parts and the long shaft.
- the support elements can under practical conditions of operation be considered to be in contact with the long shaft.
- the force of the support elements on the long shaft will be considerable, e.g. assembling forces of 12 kN may be present.
- the assembling forces may be 2, preferably 5, possibly 10, times larger than the weight of the long shaft.
- the magnitude of the vibration forces may be around half the weight of the long shaft during typical operation with a submerged pump driven by a rotation shaft surrounded by a corresponding long shaft.
- the stabilising means may be provided with dedicated vibration damping means, either active_or passive damping means, Possibly, the stabilising means further comprises releasable fastening means, e.g. mounts with bolts and corresponding nuts, for releasably fitting the at least two plate parts around the long shaft for further joining the plate parts together.
- releasable fastening means e.g. mounts with bolts and corresponding nuts, for releasably fitting the at least two plate parts around the long shaft for further joining the plate parts together.
- the stabilising means comprises at least one support element being mounted on at least one of the plate parts, the at least one support element being adapted to establish contact between the at least two plate parts and the long shaft, each of the at least one support element(s) defining a second plane, wherein, for each of the support element(s), said second plane is least substantially perpendicular to the primary plane defined by the at least two plate parts.
- the second plane of each support element substantially comprises the longitudinal symmetry axis of the long shaft for reasons of stability.
- At least one of the stabilising member(s) is a pipe extending in a direction being parallel to the longitudinal direction of the long shaft.
- the pipe is adapted to convey a fluid, e.g. gas or oil.
- This pipe is also known as the pressure pipe.
- the at least two plate parts are further adapted to fit at least substantially annularly around the pipe, thereby defining a minimum distance between the at least two plate parts and the pipe, the stabilising means further comprising adjusting means for adjusting the minimum distance between the at least two plate parts and the pipe.
- At least one of the stabilising member(s) is a pipe which at least substantially surrounds the long shaft.
- the surrounding pipe may comprise both the stabilising means, at least part of the long shaft and at least part of said pressure pipe, the stabilising means connecting the surrounding pipe with the long shaft and the pressure pipe.
- at least one of the stabilising member(s) may be the inside walls of the tank, the walls having mounts adapted to fix the stabilising means.
- the stabilising means is in the form of a guide ring.
- a long shaft may be stabilised by more than one guide ring depending on the vibrations of the long shaft.
- the one or more guide rings may be coupled together, preferably in a direction parallel to the long shaft. In such a configuration, the coupled guide-rings may mutually stabilise one another.
- the stabilising means function as a support whereas with a plurality of guide-rings the stabilising means may function as a fixing device.
- the long shaft comprises a rotating shaft adapted to mechanically transfer power from a drive means to a pump, the pump being submerged in a tank.
- the long shaft may support the rotating shaft by having bearings at appropriate intervals of the longitudinal length of the support shaft.
- Another advantage of the stabilising means is that the long shaft can be freed from the stabilising means, whereby the long shaft may be used for pulling up the submerged pump connected to the bottom end of the long shaft.
- pump service and repair is in turn also simplified by the more flexible stabilising means of the present invention.
- a problem encountered with a long shaft comprising a rotating shaft is that the rotating shaft may significantly raise the temperature of the long shaft over time.
- the stabilising means may also be exposed to a significant temperature raise over time during operation of the rotating shaft. This temperature problem may be at least partly solved by designing the plate parts to absorb and/or compensate for the raising temperature and/or by providing cooling as necessary.
- the plate parts may be manufactured in stainless steel, typically a stainless and/or acid resistant steel e.g. AISI 316L, AISI 304, W. Nr. 1.4462 or similar, as the harsh environment of the tank will often necessitate a chemical inert material.
- the plate parts may be manufactured in aluminium or an alloy comprising aluminium.
- the plate parts may be manufactured in a material capable of withstanding prolonged exposure to vibrations and the associated wear, e.g. fretting wear.
- a stabilising means for vibrationally stabilising a long shaft comprising the steps of:
- the present invention facilitates a simple and fast manufacturing process for the stabilising means. Often, the stabilising means are manufactured in relative few numbers, thus costly manufacturing preparation are avoided due to the simplicity of the method for manufacturing the stabilising means.
- the method further comprises the steps of: a) providing at least one support element being adapted to establish contact between the at least two plate parts and the long shaft, and b) mounting the at least one support element on at least one of the plate parts.
- the at least two plate parts define a primary plane and each of the at least one support element(s) define a second plane, and wherein the step of mounting the support element(s) on at least one of the plate parts is performed In such a way that, for each support element, said second plane is at least substantially perpendicular to the primary plane.
- the at least two plate parts may be provided by means of a laser cutting method.
- the at least two plate parts each has a thickness in the range of 2 mm to 20 mm, more preferably in the range of 4 mm to 16 mm, even more preferably in the range of 6 mm to 8 mm. All of these ranges are accessible to the present stage of commercially available laser cutting technology, e.g. Nitrogen lasers.
- the method of manufacturing the stabilising means is particularly beneficial in that the manufacturing can be performed in just two steps; the aforementioned laser cutting step and a step of bending the plate parts into a predetermined shape. In that way welding can be completely avoided, which is advantageous because welding of stainless steel and aluminium alloys requires special care and/or special preparations.
- the first and second aspect of the present invention may each be combined with the other aspect.
- the two second minor plates 284 fit substantially annularly around the pipe 120 and comprise four support elements 300 similar to the support elements 292 of the first minor plates 291.
- the axis D intersects the axis B in a symmetry axis of the pipe 120.
- the two second minor plates 284 can change position with each other, i.e. they have a rotational symmetry around the symmetry axis of the pipe 120.
- the two second minor plates 284 have two sets of adjusting means, i.e. respectively a nut 281 and a corresponding bolt 283, the bolt 283 being mounted in the abutting second minor plates 284 in a manner to be described in more detail below.
- the support elements 300 (which are similar to the support elements 292) will reduce the distance to the pipe 120.
- a minimum distance between the pipe 120 and the support element 300 being closest to the pipe 120 can be defined. In the limit the minimum distance will be zero and the stabilising means 200 will be fixed onto the pipe 120.
- the two first minor plates 291 similarly comprise two sets of adjusting means 310 for adjusting and establishing contact between the support elements 292 and the long shaft 130.
- the minor plates 284 and 291 may not comprise support elements 292 and 300. Instead, the inner periphery part of the minor plates 291 and 282 have a substantially half-circular shape with a radius of curvature approximately equal to the radius of long shaft 130 and the pipe 120, respectively.
- the minor plates 291 and 284 will be engaged with the long shaft 130 and the pipe 120, respectively, along at least a part of their said inner periphery.
- the thickness of the minor plates 284 and 291 may be enhanced for improving the contact between the plates 284 and 291 and the long shaft 130.
- Fig. 4 shows a side view of the stabilising means 200 showing how the plates 280, 284 and 291 are interconnected. It is to be noted how the plates 280, 284 and 291 define a primary plane substantially normal to the long shaft 130 and the pipe 120. It is also visible how the first minor plate 291 and the second plate 284 have a bent part substantially normal to said primary plane so as to engage their corresponding plate at the adjusting means 281, 283 and 310 with a substantially flat section seen from a side view. At the far left and right mount 293, bolt 294 and nut 295 are shown for joining the two main plates 280. Furthermore, one of the bolts 286 for joining the minor plate 284 and the main plate 280 are shown in a cut out section behind the pipe 120.
- Fig. 5 shows a top view of a main plate 280 of the stabilising means 200 comprising appropriate holes 530 for joining the main plate 280 with another corresponding main plate 280 as shown in Fig. 3 . Also shown are holes 520 for mounting of the first minor plates (not shown) and holes 510 for mounting of the second minor plates (not shown).
- the main plate 280 also comprises additional holes 540 prepared for reducing material consumption without jeopardising strength and stability of the stabilising means 200. Furthermore, the holes 540 facilitate cleaning of the tank by automatic tank washing machines.
- Fig. 6 shows three different views of the second minor plate 284; from the top A, and two side views, B and C respectively, B and C having a viewing angle normal to each other.
- the second minor plate 284 comprises holes 610 for joining the second minor plate 284 with appropriate fastening means, e.g. bolts and nuts or similar, to the main plates 280.
- the bolt 286 shown in Fig. 3 may thus penetrate a hole 510 shown in Fig. 5 and a hole 610 for joining the two said plates together.
- the second minor plate 284 comprises receiving sections 620 for mounting of the support elements shown in Figs. 3 and 4 with reference numeral 292.
- the support elements 292 may be designed so that after insertion at the receiving sections 620 no dedicated fastening means are necessary during operation.
- the second minor plate 284 comprises a first part 284b, the first part 284b comprises four projections 284d for fixation of the adjusting means (not shown) when the second minor plate 284 is assembled as a part of the stabilising means 200. Furthermore, the second minor plate 284 comprises two holes 284c that function as receiving holes for bolts (not shown) of the adjusting means. As it is apparent from especially Fig. 6 , view B and C, that the second minor plate 284 also comprises a bent part 284a, the bent part 284a being substantially normal to remaining part of the second minor plate 284. The bent part 284a also comprises holes as seen in view C of Fig.
- the first minor plates 291 will have a similar design to that shown in Fig. 6 , but the first minor plate 291 is adapted to fit at least substantially annularly in combination with another corresponding minor plate 291 around the long shaft 130.
- Fig. 7 shows a partial top view of the adjusting means 281 and 283 of the invention when two second minor plates 284 are in abutting engagement as shown in Fig. 3 .
- the bolts 283 are received in the holes 284c of the first part 284b of the second minor plate 284.
- the projections 284d have also entered the corresponding holes of the bent part 284a.
- the nuts 281 are not in engagement with the bolts 283. It is an advantage of the invention that the receiving holes 284c can be dimensioned so that the bolts 283 do not fall out of the second minor plate 284 even though the corresponding nuts 281 are not engaged with the bolts 283. This is preferably done by manufacturing the holes 284c substantially equal to the size of the bolts 283 so that the bolts 283 after being pressed into the holes 284c will remain there also during remounting and service of the stabilising means 200.
- Fig. 8 shows a support element 292 of the invention.
- the support element 292 has an Alike shape with an open section 855 at the top in order to engage with the minor plates 280.
- the distance 820 is preferably slightly larger than the distance 810 in order to allow the minor plates to fit in when considering the given tolerances of the manufacturing process in question.
- the parts 830 of the support element 292 will be engaged with the pipe (not shown) before the centre part 840 due to the small distance 850 of approximately 0,5 mm.
- the support element 292 (being manufactured in a relatively flexible material like stainless steel) will bend slightly upwards and the distance 810 will decrease, thus as the pressure tension is increased the support element 292 will press more and more onto the minor plate (not shown) positioned at 855. Therefore, the support element 292 needs no special fastening means as the above mentioned design inherently provides fastening during operation.
- the above remarks relating to the support elements 292 would apply equally to a similar description of the support elements 300 shown in Fig. 3 .
- Fig. 9 shows a side view of stabilising means 700 according to an alternative embodiment.
- the stabilising means 700 comprises two plate parts 600 that fit substantially annularly around the long shaft 130.
- the stabilising means 700 is mechanically connected to a stabilising member (not shown), e.g. a wall, a pipe parallel to the long shaft 130 etc.
- Support elements 292 similar to the previous embodiment are mounted on the plate parts 600 for establishing contact between the long shaft 130 and the plate parts 600.
- the support elements 292 are designed so as to provide self-fastening during operation no special fastening means are necessary resulting in a relatively simple design which is fast and cost-effective to manufacture and mount.
- the two plate parts 600 are joined by adjusting means, i.e.
- Fig. 9 there is also shown in broken lines the mount 140 and the wall 150 similar to the Figs. 1 and 2 .
- Fig. 10 shows a more detailed view of the stabilising means 700.
- the two plate parts 600 are seen to have a rotational symmetry around the centre of the long shaft 130, said centre being coincident with the centre of the rotating shaft 135 as viewed in Fig. 10 .
- the two plate parts 600 may be identical resulting in simple manufacturing process.
- the two plate parts 600 are joined by adjusting means, i.e. 601 and 603.
- Fig. 10 it is seen that the support elements 292 are positioned relative to the long shaft 130 and the plates 600 so that there is little or no direct contact between the plate parts 600 and the long shaft 130 as illustrated by the tiny gap. This makes it easier to displace the stabilising means 700 in the longitudinal direction of the long shaft 130 when the adjusting means are slacken.
- the plate parts 600 comprise holes 540 to facilitate easy cleaning of the stabilising means 700 and the environment wherein the stabilising means 700 is positioned.
- Each of the plates 600 comprises two incisions or indents 620 in order to provide access for one or more auxiliary pipe(s) 800 within the abutting interface of the stabilising means 700 and the mount 140 (the latter not shown in Fig. 10 ).
- the auxiliary pipe 800 has a longitudinal extension substantially parallel to the long shaft 130, and the pipe 800 may contain cooling liquids, lubrication liquids, control wires, etc. for the lower lying pump 110 (not shown in Fig. 10 ).
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Vibration Prevention Devices (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Description
- The present invention relates to stabilising means for vibrationally stabilising a long shaft, preferably the long shaft comprises a rotating shaft driving a submerged pump. The invention also relates to a method for manufacturing such a stabilising means.
- Storing explosive media, e.g. gas or oil, in ships' tank is regulated by safety regulations such as those of the International Maritime Organisation (IMO) in order to minimise the risk of explosion during operation. Especially, it is presently not allowed to deploy electric motors within the tank for driving pumps etc. due to the risk of sparks igniting an explosion. Hydraulic motors have the drawback that accidental leaks will contaminate the content of the tank. Hydraulic systems also require a complicated supply of high pressure oil.
- A common solution for driving a pump within the tank is to apply an electrical motor on top of the tank and mounting a long rotating shaft between the electrical motor and the pump inside the tank. Such pumps are known as deep well pumps. The rotating shafts can be up to 30 m long and require special considerations with regard to support and stabilisation.
- Typically, the rotating shaft will be surrounded and supported by a concentric long support shaft. The support shaft is in turn fixed by intermediate support means, e.g. a pipe holder or clamp, to a parallel gas/oil pipe and/or a support tube surrounding both the support shaft and gas/oil pipe. Possibly, the support shaft can also be fixed to the walls of the tank. The support shaft needs to be fixed due to the vibrations induced by the rotating shaft. Movement of fluids in the tank known as sloshing may also generate forces that require the shaft to be fixed.
- One way of fixing the intermediate support means onto the support shaft is to weld them together. However, this solution is highly inflexible when the system needs to be remounted for service or repair. Secondly, due the chemically aggressive environment the parts are usually manufactured in stainless steel, which is a troublesome material for welding.
- Another solution for fixing the intermediate support means on the support shaft is to use flanges of the support shaft. The support shaft typically consists of smaller tube pieces joined by flanges. The flanges may additionally comprise means for fixing the intermediate support means. This solution limits the available fixation positions of the intermediate support means to the flanges and complicates design of the system.
-
US 5017104 discloses a stabilizer for vertically driven pumps in which a bearing is supported on the drive shaft approximately half way between the pump and the motor. The stabilizer bearing prevents bowing of the drive shaft which would cause considerable wear on the pump packing resulting in leaks. To install the stabilizer, the coupling between the pump and motor must be removed and in some cases there is insufficient room and the motor must be removed. The bearing of the invention is then slipped over the shaft to a point as near halfway between the pump and motor as possible. The arms should be extended and secured well enough to determine the location to drill holes in the legs of the frame to accommodate bolts to secure the end of all four arms. -
US 2002/085776 discloses an improved flexible support for a steady bearing in rotational contact with the surface of a shaft allows the bearing and housing to substantially track the contact surface of an impeller shaft when the shaft is subject to elastic deflection during operation. The flexible support employs a flexible disc pack, which is comprised of a plurality of thin, flexible disc elements in a stacked arrangement. The disc pack is mounted to a support ring and is also mounted to the bearing housing such that the bearing housing and other bearing elements are capable of deflection to substantially align with the axis of the impeller shaft when the shaft deflects. - It may be seen as an object of the present invention to provide means for overcoming the aforementioned problems with fixing of the support shaft by providing stabilising means for vibrationally stabilising the long support shaft and a method for manufacturing the stabilising means. It is a further object to provide stabilising means for vibrationally stabilising the long shaft in a flexible way for easy mounting and remounting for repair and service. It is yet a further object that the stabilising means can be quickly manufactured with relatively few steps of manufacturing.
- This object and several other objects are obtained in a first aspect of the invention by a stabilising means for vibrationally stabilising a long shaft, the stabilising means comprising:
- at least two plate parts, in combination being adapted to fit at least substantially annularly around the long shaft and to substantially fix the long shaft in relation to at least one stabilising member, thereby defining a minimum distance between the at least two plate parts and the long shaft, and
- adjusting means for adjusting the minimum distance between the at least two plate parts and the long shaft,
- During mounting and initial operation it is particularly advantageous to have stabilising means that are easily dlsplaceable in the longitudinal direction of the long shaft. This is due to the fact that the optimal vertical positions for the stabilising means to dampen vibrations of the long shaft often may vary from estimates made beforehand. Thus, the possibility to easily displacing the stabilising means will increase the potential for damping the vibrations of the long shaft.
- The stabilising means may be applied in off-shore and maritime applications, as well as in on-shore applications. In particular, the stabilising means may be applied in off-shore and maritime applications such as liquid gas tankers, chemical tankers, fuel production and storage off-shore facilities (FPSO) etc.
- Preferably, the stabilising means further comprises at least one support element being mounted on at least one of the plate parts, the at least one support element being adapted to establish contact between the at least two plate parts and the long shaft. Even though the long shaft vibrates, the support elements can under practical conditions of operation be considered to be in contact with the long shaft. Typically, the force of the support elements on the long shaft will be considerable, e.g. assembling forces of 12 kN may be present. To obtain a sufficient suppression of the vibrations of the long shaft the assembling forces may be 2, preferably 5, possibly 10, times larger than the weight of the long shaft. The magnitude of the vibration forces may be around half the weight of the long shaft during typical operation with a submerged pump driven by a rotation shaft surrounded by a corresponding long shaft. Optionally, the stabilising means may be provided with dedicated vibration damping means, either active_or passive damping means,
Possibly, the stabilising means further comprises releasable fastening means, e.g. mounts with bolts and corresponding nuts, for releasably fitting the at least two plate parts around the long shaft for further joining the plate parts together. - Preferably, the stabilising means comprises at least one support element being mounted on at least one of the plate parts, the at least one support element being adapted to establish contact between the at least two plate parts and the long shaft, each of the at least one support element(s) defining a second plane, wherein, for each of the support element(s), said second plane is least substantially perpendicular to the primary plane defined by the at least two plate parts. Typically, the second plane of each support element substantially comprises the longitudinal symmetry axis of the long shaft for reasons of stability.
- Preferably, at least one of the stabilising member(s) is a pipe extending in a direction being parallel to the longitudinal direction of the long shaft. Typically, the pipe is adapted to convey a fluid, e.g. gas or oil. This pipe is also known as the pressure pipe. More preferably, the at least two plate parts are further adapted to fit at least substantially annularly around the pipe, thereby defining a minimum distance between the at least two plate parts and the pipe, the stabilising means further comprising adjusting means for adjusting the minimum distance between the at least two plate parts and the pipe.
- Alternatively or additionally, at least one of the stabilising member(s) is a pipe which at least substantially surrounds the long shaft. Thus, the surrounding pipe may comprise both the stabilising means, at least part of the long shaft and at least part of said pressure pipe, the stabilising means connecting the surrounding pipe with the long shaft and the pressure pipe. Preferably, at least one of the stabilising member(s) may be the inside walls of the tank, the walls having mounts adapted to fix the stabilising means.
- Preferably, the stabilising means is in the form of a guide ring. A long shaft may be stabilised by more than one guide ring depending on the vibrations of the long shaft. Additionally, the one or more guide rings may be coupled together, preferably in a direction parallel to the long shaft. In such a configuration, the coupled guide-rings may mutually stabilise one another. Thus, for a single guide-ring the stabilising means function as a support whereas with a plurality of guide-rings the stabilising means may function as a fixing device.
- Preferably, the long shaft comprises a rotating shaft adapted to mechanically transfer power from a drive means to a pump, the pump being submerged in a tank. The long shaft may support the rotating shaft by having bearings at appropriate intervals of the longitudinal length of the support shaft. Another advantage of the stabilising means is that the long shaft can be freed from the stabilising means, whereby the long shaft may be used for pulling up the submerged pump connected to the bottom end of the long shaft. Hence, for example pump service and repair is in turn also simplified by the more flexible stabilising means of the present invention. A problem encountered with a long shaft comprising a rotating shaft is that the rotating shaft may significantly raise the temperature of the long shaft over time. In turn, the stabilising means may also be exposed to a significant temperature raise over time during operation of the rotating shaft. This temperature problem may be at least partly solved by designing the plate parts to absorb and/or compensate for the raising temperature and/or by providing cooling as necessary.
- The plate parts may be manufactured in stainless steel, typically a stainless and/or acid resistant steel e.g. AISI 316L, AISI 304, W. Nr. 1.4462 or similar, as the harsh environment of the tank will often necessitate a chemical inert material. Alternatively, the plate parts may be manufactured in aluminium or an alloy comprising aluminium. In particular, the plate parts may be manufactured in a material capable of withstanding prolonged exposure to vibrations and the associated wear, e.g. fretting wear.
- According to a second aspect of the invention there is provided a method for manufacturing a stabilising means for vibrationally stabilising a long shaft, the method comprising the steps of:
- providing at least two plate parts having a predetermined shape, adapted to releasably fit the at least two plate parts at least substantially annularly around the long shaft and to substantially fix the long shaft in relation to at least one stabilising member, and
- providing adjusting means being adapted to adjust a minimum distance between the at least two plate parts and the long shaft,
- It is an advantage of the invention that the present invention facilitates a simple and fast manufacturing process for the stabilising means. Often, the stabilising means are manufactured in relative few numbers, thus costly manufacturing preparation are avoided due to the simplicity of the method for manufacturing the stabilising means.
- Preferably, the method further comprises the steps of: a) providing at least one support element being adapted to establish contact between the at least two plate parts and the long shaft, and b) mounting the at least one support element on at least one of the plate parts. More preferably, the at least two plate parts define a primary plane and each of the at least one support element(s) define a second plane, and wherein the step of mounting the support element(s) on at least one of the plate parts is performed In such a way that, for each support element, said second plane is at least substantially perpendicular to the primary plane.
- It is a particular advantage of the present invention that the at least two plate parts may be provided by means of a laser cutting method. Preferably, the at least two plate parts each has a thickness in the range of 2 mm to 20 mm, more preferably in the range of 4 mm to 16 mm, even more preferably in the range of 6 mm to 8 mm. All of these ranges are accessible to the present stage of commercially available laser cutting technology, e.g. Nitrogen lasers. However, principal there is no upper limit on the thickness of the plate parts except for limits imposed from a handle viewpoint and/or manufacturing view point. In particular, for an embodiment where the aforementioned support elements are not present it may be advantageous to increase the thickness of the plate part in order to enhance the area of contact between the plate parts and the long shaft to be stabilised.
- The method of manufacturing the stabilising means is particularly beneficial in that the manufacturing can be performed in just two steps; the aforementioned laser cutting step and a step of bending the plate parts into a predetermined shape. In that way welding can be completely avoided, which is advantageous because welding of stainless steel and aluminium alloys requires special care and/or special preparations.
- The first and second aspect of the present invention may each be combined with the other aspect. These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter.
- While the invention is susceptible to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and will be described in detail herein. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed. Rather, the invention is to cover all modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims.
-
Fig. 1 shows a side view of the surrounding environment of the stabilising means during operation, -
Fig. 2 shows a cross sectional view along the line A-A ofFig. 1 , -
Fig. 3 shows a more detailed view of the stabilising means, -
Fig. 4 shows a side view of the stabilising means, -
Fig. 5 shows a main plate part of the stabilising means, -
Fig. 6 shows different views of a minor plate part, -
Fig. 7 shows a partial top view of the adjusting means of the invention, -
Fig. 8 shows a support element of the invention, -
Fig. 9 shows a side view of the stabilising means according to an alternative embodiment, and -
Fig. 10 shows a more detailed view of the stabilising means according to an alternative embodiment. -
-
Fig. 1 shows a side view of the surrounding environment of the stabilising means during operation. Anelectrical motor 100 positioned on top of a tank drives a submergedpump 110 positioned on the bottom of the tank. Apipe 120 for conveying fluids is shown substantially parallel to along shaft 130 comprising arotating shaft 135 shown inFig. 1 . Thewall 150 of the tank or other stable internal structure of the tank comprisesmounts 140 for fixing the stabilising means 200. -
Fig. 2 shows a cross sectional view along the line A-A ofFig. 1 . In this cross sectional view, therotating shaft 135 surrounded by thelong shaft 130 is visible. It can also be seen that thewall 150 through themount 140 and the stabilisingmember 200 is connected to thepipe 120 and thelong shaft 130, and how the stabilisingmember 200 in turn in a substantially horizontal plane fits at least substantially around thelong shaft 130 and thepipe 120. -
Fig. 3 shows a more detailed view of a most preferred embodiment of the stabilising means 200. The stabilising means 200 comprises six plates grouped in three pairs of identical plates; twomain plates 280, two firstminor plates 291, and two secondminor plates 284. When joined together bymounts 293 fastened bybolts 294, the twomain plates 280 have an outer circular periphery for engaging with themounts 140 shown inFig. 2 (the top part of the uppermain plate 280 is not shown to clarifyFig. 3 ). The twomain plates 280 comprise suitable holes for securing theminor plates bolts 286. In this embodiment, the twomain plates 280 exhibit a mirror symmetry around the axis B. The two firstminor plates 291 are fastened onto the twomain plates 280, each firstminor plate 291 being mounted with a bolt and a corresponding nut in eachmain plate 280. The two firstminor plates 291 fit substantially annularly around thelong shaft 130. The first minor plates comprises foursupport elements 292 symmetrically arranged around thelong shaft 130, thesupport elements 292 being designed for engaging and establishing contact with thelong shaft 130. When the stabilising means 200 are in an engaged or fixed position relative to thelong shaft 130 the two firstminor plates 291 only have contact with thelong shaft 130 in the vicinity of thesupport elements 292. Thesupport elements 292 have a substantially triangular shape, thesupport elements 292 being substantially normal to a primary plane defined by theplates support elements 292 will be described in more detail below. - The two second
minor plates 284 fit substantially annularly around thepipe 120 and comprise foursupport elements 300 similar to thesupport elements 292 of the firstminor plates 291. The axis D intersects the axis B in a symmetry axis of thepipe 120. Upon 180 degree rotation around said symmetry axis of thepipe 120 the two secondminor plates 284 can change position with each other, i.e. they have a rotational symmetry around the symmetry axis of thepipe 120. The two secondminor plates 284 have two sets of adjusting means, i.e. respectively anut 281 and acorresponding bolt 283, thebolt 283 being mounted in the abutting secondminor plates 284 in a manner to be described in more detail below. When thebolt 283 is tightened the support elements 300 (which are similar to the support elements 292) will reduce the distance to thepipe 120. In any given position of the adjusting means 281 and 283 a minimum distance between thepipe 120 and thesupport element 300 being closest to thepipe 120 can be defined. In the limit the minimum distance will be zero and the stabilising means 200 will be fixed onto thepipe 120. The two firstminor plates 291 similarly comprise two sets of adjusting means 310 for adjusting and establishing contact between thesupport elements 292 and thelong shaft 130. - In an alternative embodiment the
minor plates support elements minor plates 291 and 282 have a substantially half-circular shape with a radius of curvature approximately equal to the radius oflong shaft 130 and thepipe 120, respectively. When the adjusting means 281, 283 and 310 are in a tightened position theminor plates long shaft 130 and thepipe 120, respectively, along at least a part of their said inner periphery. For such an embodiment, the thickness of theminor plates plates long shaft 130. -
Fig. 4 shows a side view of the stabilising means 200 showing how theplates plates long shaft 130 and thepipe 120. It is also visible how the firstminor plate 291 and thesecond plate 284 have a bent part substantially normal to said primary plane so as to engage their corresponding plate at the adjusting means 281, 283 and 310 with a substantially flat section seen from a side view. At the far left andright mount 293,bolt 294 andnut 295 are shown for joining the twomain plates 280. Furthermore, one of thebolts 286 for joining theminor plate 284 and themain plate 280 are shown in a cut out section behind thepipe 120. -
Fig. 5 shows a top view of amain plate 280 of the stabilising means 200 comprisingappropriate holes 530 for joining themain plate 280 with another correspondingmain plate 280 as shown inFig. 3 . Also shown areholes 520 for mounting of the first minor plates (not shown) and holes 510 for mounting of the second minor plates (not shown). Themain plate 280 also comprisesadditional holes 540 prepared for reducing material consumption without jeopardising strength and stability of the stabilising means 200. Furthermore, theholes 540 facilitate cleaning of the tank by automatic tank washing machines. -
Fig. 6 shows three different views of the secondminor plate 284; from the top A, and two side views, B and C respectively, B and C having a viewing angle normal to each other. The secondminor plate 284 comprisesholes 610 for joining the secondminor plate 284 with appropriate fastening means, e.g. bolts and nuts or similar, to themain plates 280. Thebolt 286 shown inFig. 3 may thus penetrate ahole 510 shown inFig. 5 and ahole 610 for joining the two said plates together. Additionally, the secondminor plate 284 comprises receivingsections 620 for mounting of the support elements shown inFigs. 3 and4 withreference numeral 292. Thesupport elements 292 may be designed so that after insertion at the receivingsections 620 no dedicated fastening means are necessary during operation. The secondminor plate 284 comprises afirst part 284b, thefirst part 284b comprises fourprojections 284d for fixation of the adjusting means (not shown) when the secondminor plate 284 is assembled as a part of the stabilising means 200. Furthermore, the secondminor plate 284 comprises twoholes 284c that function as receiving holes for bolts (not shown) of the adjusting means. As it is apparent from especiallyFig. 6 , view B and C, that the secondminor plate 284 also comprises abent part 284a, thebent part 284a being substantially normal to remaining part of the secondminor plate 284. Thebent part 284a also comprises holes as seen in view C ofFig. 6 for receiving adjusting means 281 and 283 as well as theprojections parts 284d when assembled as a part of the stabilising means 200. The firstminor plates 291 will have a similar design to that shown inFig. 6 , but the firstminor plate 291 is adapted to fit at least substantially annularly in combination with another correspondingminor plate 291 around thelong shaft 130. -
Fig. 7 shows a partial top view of the adjusting means 281 and 283 of the invention when two secondminor plates 284 are in abutting engagement as shown inFig. 3 . Thebolts 283 are received in theholes 284c of thefirst part 284b of the secondminor plate 284. Theprojections 284d have also entered the corresponding holes of thebent part 284a. Thenuts 281 are not in engagement with thebolts 283. It is an advantage of the invention that the receivingholes 284c can be dimensioned so that thebolts 283 do not fall out of the secondminor plate 284 even though the correspondingnuts 281 are not engaged with thebolts 283. This is preferably done by manufacturing theholes 284c substantially equal to the size of thebolts 283 so that thebolts 283 after being pressed into theholes 284c will remain there also during remounting and service of the stabilising means 200. -
Fig. 8 shows asupport element 292 of the invention. Thesupport element 292 has an Alike shape with anopen section 855 at the top in order to engage with theminor plates 280. Thedistance 820 is preferably slightly larger than thedistance 810 in order to allow the minor plates to fit in when considering the given tolerances of the manufacturing process in question. When assembled, theparts 830 of thesupport element 292 will be engaged with the pipe (not shown) before the centre part 840 due to thesmall distance 850 of approximately 0,5 mm. When the pressure tension on theparts 830 is increased during operation the support element 292 (being manufactured in a relatively flexible material like stainless steel) will bend slightly upwards and thedistance 810 will decrease, thus as the pressure tension is increased thesupport element 292 will press more and more onto the minor plate (not shown) positioned at 855. Therefore, thesupport element 292 needs no special fastening means as the above mentioned design inherently provides fastening during operation. The above remarks relating to thesupport elements 292 would apply equally to a similar description of thesupport elements 300 shown inFig. 3 . -
Fig. 9 shows a side view of stabilising means 700 according to an alternative embodiment. In this embodiment, the stabilising means 700 comprises twoplate parts 600 that fit substantially annularly around thelong shaft 130. The stabilising means 700 is mechanically connected to a stabilising member (not shown), e.g. a wall, a pipe parallel to thelong shaft 130 etc.Support elements 292 similar to the previous embodiment are mounted on theplate parts 600 for establishing contact between thelong shaft 130 and theplate parts 600. As thesupport elements 292 are designed so as to provide self-fastening during operation no special fastening means are necessary resulting in a relatively simple design which is fast and cost-effective to manufacture and mount. The twoplate parts 600 are joined by adjusting means, i.e.bolts 601 andnuts 603, mounted through a bent portion of theplate parts 600. This is also similar to the previous embodiment, see e.g.Figs. 3 and4 and the corresponding parts of the description. InFig. 9 , there is also shown in broken lines themount 140 and thewall 150 similar to theFigs. 1 and2 . -
Fig. 10 shows a more detailed view of the stabilising means 700. The twoplate parts 600 are seen to have a rotational symmetry around the centre of thelong shaft 130, said centre being coincident with the centre of therotating shaft 135 as viewed inFig. 10 . Thus, the twoplate parts 600 may be identical resulting in simple manufacturing process. The twoplate parts 600 are joined by adjusting means, i.e. 601 and 603. InFig. 10 , it is seen that thesupport elements 292 are positioned relative to thelong shaft 130 and theplates 600 so that there is little or no direct contact between theplate parts 600 and thelong shaft 130 as illustrated by the tiny gap. This makes it easier to displace the stabilising means 700 in the longitudinal direction of thelong shaft 130 when the adjusting means are slacken. Theplate parts 600 compriseholes 540 to facilitate easy cleaning of the stabilising means 700 and the environment wherein the stabilising means 700 is positioned. Each of theplates 600 comprises two incisions orindents 620 in order to provide access for one or more auxiliary pipe(s) 800 within the abutting interface of the stabilising means 700 and the mount 140 (the latter not shown inFig. 10 ). Theauxiliary pipe 800 has a longitudinal extension substantially parallel to thelong shaft 130, and thepipe 800 may contain cooling liquids, lubrication liquids, control wires, etc. for the lower lying pump 110 (not shown inFig. 10 ).
wherein the adjusting means is adapted to be in at least two positions, a first of said positions substantially fixing the stabilising means in a longitudinal direction of the long shaft, and a second of said positions allowing the stabilising means to slidably move along said longitudinal direction of the long shaft.
wherein the adjusting means is adapted to be in at least two positions, a first of said positions substantially fixing the stabilising means in a longitudinal direction of the long shaft, and a second of said positions allowing the stabilising means to slidably move along said longitudinal direction of the long shaft.
Claims (21)
- A stabilising means (200) for vibrationally stabilising a long shaft (130), the stabilising means comprising:- at least two plate parts (291, 284), in combination being adapted to fit at least substantially annularly around the long shaft (130) and to substantially fix the long shaft (130) in relation to at least one stabilising member (120), thereby defining a minimum distance between the at least two plate parts (291, 284) and the long shaft (130), and- adjusting means (281, 283, 310) for adjusting the minimum distance between the at least two plate parts (291, 284) and the long shaft (130),
wherein the at least two plate parts (291, 284) define a primary plane, and wherein the longitudinal direction of the long shaft (130) extends substantially normal to said primary plane when the stabilising means (200) is mounted on the long shaft (130), and
wherein the adjusting means (281, 283, 310) is adapted to be in at least two positions, a first of said positions substantially fixing the stabilising means (200) in a longitudinal direction of the long shaft (130), and a second of said positions allowing the stabilising means to slidably move along said longitudinal direction of the long shaft (130). - A stabilising means (200) according to claims 1, further comprising at least one support element (292, 300) being mounted on at least one of the plate parts (291, 284), the at least one support element (292, 300) being adapted to establish contact between the at least two plate parts (291, 284) and the long shaft (130).
- A stabilising means (200) according to any of claims 1-2, the stabilising means (200) further comprising releasable fastening means for releasably fitting the at least two plate parts (291, 284) around the long shaft (130).
- A stabilising means (200) according to claim 1, the stabilising means (200) comprising at least one support element (292, 300) being mounted on at least one of the plate parts (291, 284), the at least one support element (292, 300) being adapted to establish contact between the at least two plate parts (291, 284) and the long shaft (130), each of the at least one support element(s) (292, 300) defining a second plane, wherein, for each of the support element(s) (292, 300), said second plane is least substantially perpendicular to the primary plane defined by the at least two plate parts (291, 284).
- A stabilising means (200) according to any of claims 1-4, wherein at least one of the stabilising member(s) is a pipe (120) extending in a direction being parallel to the longitudinal direction of the long shaft (130).
- A stabilising means (200) according to claim 5, wherein the at least two plate parts (291, 284) are further adapted to fit at least substantially annularly around the pipe (120), thereby defining a minimum distance between the at least two plate parts (291, 284) and the pipe (120), the stabilising means further comprising adjusting means (281, 283, 310) for adjusting the minimum distance between the at least two plate parts (291, 284) and the pipe (120).
- A stabilising means (200) according to claim 6, wherein the pipe (120) is adapted to convey a fluids.
- A stabilising means (200) according to any of claims 1-7, wherein at least one of the stabilising member(s) is a pipe which at least substantially surrounds the long shaft.
- A stabilising means (200) according to any of claims 1-8, wherein the stabilising means (200) is in the form of a guide ring.
- A stabilising means (200) according to any of claims 1-9, wherein the long shaft (130) comprises a rotating shaft (135) adapted to mechanically transfer power from a drive means (100) to a pump (110).
- A stabilising means (200) according to any of claims 1-10, wherein the at least two plate parts (291, 284) have been provided by means of a laser cutting method.
- A stabilising means (200) according to any of claims 1-11, wherein the at least two plate parts (291, 284) each has a thickness in the range of 2 mm to 20 mm, more preferably in the range of 4 mm to 16 mm, even more preferably in the range of 6 mm to 8 mm.
- A stabilising means (200) according to claim 1, wherein at least one of the plate parts (291, 284) is manufactured in stainless steel.
- A stabilising means (200) according to claim 1, wherein at least one of the plate parts (291, 284) is manufactured in aluminium or an alloy comprising aluminium.
- A method for manufacturing a stabilising means (200) for vibrationally stabilising a long shaft, the method comprising the steps of:- providing at least two plate parts (291, 284) having a predetermined shape, adapted to releasably fit the at least two plate parts (291, 284) at least substantially annularly around the long shaft (130) and to substantially fix the long shaft (130) in relation to at least one stabilising member (120), and- providing adjusting means (281, 283, 310) being adapted to adjust a minimum distance between the at least two plate parts (291, 284) and the long shaft (130),
wherein the at least two plate parts (291, 284) define a primary plane, and wherein the longitudinal direction of the long shaft (130) extends substantially normal to said primary plane when the stabilising means (200) is mounted on the long shaft (130), and
wherein the adjusting means (281, 283, 310) is adapted to be in at least two positions, a first of said positions substantially fixing the stabilising means (200) in a longitudinal direction of the long shaft (130), and a second of said positions allowing the stabilising means to slidably move along said longitudinal direction of the long shaft (130). - A method according to claim 15, further comprising the steps of:- providing at least one support element (292, 300) being adapted to establish contact between the at least two plate parts (291, 284) and the long shaft (130),- mounting the at least one support element (292, 300) on at least one of the plate parts (291, 284).
- A method according to claim 16, wherein the at least two plate parts (291, 284) define a primary plane and each of the at least one support element(s) (292, 300) define a second plane, and wherein the step of mounting the support element(s) (292, 300) on at least one of the plate parts (291, 284) is performed in such a way that, for each support element (292, 300), said second plane is at least substantially perpendicular to the primary plane.
- A method according to any of claims 15-17, wherein the step of providing at least two plate parts (291, 284) comprises laser cutting the plate parts from a plate.
- A method according to any of claims 15-18, wherein the step of providing at least two plate parts (291, 284) comprises providing at least two plate parts (291, 284) having a thickness in the range of 2 mm to 20 mm, more preferably in the range of 4 mm to 16 mm, even more preferably in the range of 6 mm to 8 mm.
- A method according to any of claims 15-19, further comprising the step of bending at least one of the plate parts (291, 284) into a predetermined shape.
- A method according to any of claims 15-20, wherein the step of providing the at least two plate parts (291, 284) having a predetermined shape, adapted to releasably fit the at least two plate parts (291, 284) at least substantially annularly around the long shaft (130) does not comprise any welding of the at least two plate parts (291, 284),
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DKPA200301673 | 2003-11-10 | ||
PCT/DK2004/000776 WO2005045253A1 (en) | 2003-11-10 | 2004-11-09 | Stabilising means for vibrationally stabilising a long shaft |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1692398A1 EP1692398A1 (en) | 2006-08-23 |
EP1692398B1 true EP1692398B1 (en) | 2012-08-15 |
Family
ID=34560120
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04797438A Not-in-force EP1692398B1 (en) | 2003-11-10 | 2004-11-09 | Stabilising means for vibrationally stabilising a long shaft |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1692398B1 (en) |
JP (1) | JP4713489B2 (en) |
KR (1) | KR100847908B1 (en) |
NO (1) | NO339267B1 (en) |
WO (1) | WO2005045253A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103133351B (en) * | 2013-03-07 | 2015-04-22 | 湖南耐普泵业有限公司 | Vertical-type long axis sea water pump with extractable core |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2112386A (en) * | 1937-06-22 | 1938-03-29 | Steele Charley | Pump |
DE1214199B (en) * | 1963-10-08 | 1966-04-14 | Metallgesellschaft Ag | Device for fastening vertically arranged shafts on which rotating fluid distributors are fastened |
JPS53129719A (en) * | 1977-04-18 | 1978-11-13 | Mowaru Oogiyusuto | Apparatus for keeping combustion pressure of internal combustion engine constant during one cycle |
US4579596A (en) * | 1984-11-01 | 1986-04-01 | Union Carbide Corporation | In-situ removal of oily deposits from the interior surfaces of conduits |
JPS61180083A (en) * | 1985-02-06 | 1986-08-12 | 株式会社日立製作所 | Piping supporter |
US5017104A (en) * | 1988-12-12 | 1991-05-21 | Baker Marvin B | Stabilizer for vertically driven pumps |
JPH072168A (en) * | 1993-03-24 | 1995-01-06 | Takatori Seisakusho:Kk | Oil pressure control valve |
JP4208282B2 (en) * | 1998-03-06 | 2009-01-14 | 株式会社小坂研究所 | Submerged cargo pump system with reduced vibration noise |
JP3851730B2 (en) * | 1998-10-16 | 2006-11-29 | 株式会社クボタ | Vertical shaft pump pumping pipe intermediate holding device |
JP2001317081A (en) * | 2000-05-10 | 2001-11-16 | Hitachi Constr Mach Co Ltd | Slewing type construction machine |
JP2002130535A (en) * | 2000-10-17 | 2002-05-09 | Nichiei Intec Co Ltd | Piping support fitting and piping support structure using the same |
US6517246B2 (en) * | 2000-12-29 | 2003-02-11 | Spx Corporation | Flexible support and method for a steady bearing |
-
2004
- 2004-11-09 EP EP04797438A patent/EP1692398B1/en not_active Not-in-force
- 2004-11-09 JP JP2006538655A patent/JP4713489B2/en active Active
- 2004-11-09 KR KR1020067011433A patent/KR100847908B1/en active IP Right Grant
- 2004-11-09 WO PCT/DK2004/000776 patent/WO2005045253A1/en active Application Filing
-
2006
- 2006-05-12 NO NO20062165A patent/NO339267B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JP4713489B2 (en) | 2011-06-29 |
NO20062165L (en) | 2006-06-12 |
JP2007510851A (en) | 2007-04-26 |
KR100847908B1 (en) | 2008-07-23 |
KR20060111564A (en) | 2006-10-27 |
EP1692398A1 (en) | 2006-08-23 |
WO2005045253A1 (en) | 2005-05-19 |
NO339267B1 (en) | 2016-11-21 |
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