CN111689416A - Stern shaft dismounting tool and stern shaft dismounting method - Google Patents
Stern shaft dismounting tool and stern shaft dismounting method Download PDFInfo
- Publication number
- CN111689416A CN111689416A CN202010474662.8A CN202010474662A CN111689416A CN 111689416 A CN111689416 A CN 111689416A CN 202010474662 A CN202010474662 A CN 202010474662A CN 111689416 A CN111689416 A CN 111689416A
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- Prior art keywords
- stern shaft
- stern
- shaft
- pull rod
- rod body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C25/00—Cranes not provided for in groups B66C17/00 - B66C23/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B81/00—Repairing or maintaining vessels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
The invention relates to a screw shaft dismounting tool and a screw shaft dismounting method, wherein the screw shaft dismounting tool comprises a pull rod, a protective sleeve and two lifting clamping rings; the pull rod comprises a pull rod body and pull rod lifting lugs fixedly arranged at two ends of the pull rod body; the pull rod body is detachably and fixedly arranged in a screw shaft flange hole of a screw shaft to be disassembled in a penetrating mode, the two ends of the pull rod body are fixedly hinged with the lifting clamp rings, acting force can be applied to the lifting clamp rings, then acting force is applied to the screw shaft, and the screw shaft is pulled out from a screw shaft bearing; in addition, the rigid contact between the pull rod body and the flange hole of the stern shaft is avoided through the arrangement of the protective sleeve, and the damage to the flange hole of the stern shaft is effectively avoided.
Description
Technical Field
The invention relates to the technical field of ship maintenance, in particular to a screw shaft disassembling tool and a screw shaft disassembling method.
Background
The basic task of the ship shafting is to transmit the power of the main engine to the propeller and simultaneously transmit the axial thrust generated by the rotation of the propeller to the ship body so as to push the ship to move. Referring to fig. 1, fig. 1 is a schematic structural diagram of a marine shafting, as shown, the marine shafting generally includes a main machine 2, a thrust shaft 3, a thrust bearing (not shown), an intermediate shaft 4, a stern shaft 5, a stern shaft bearing 6 and a propeller 7. The front end of the thrust shaft 3 is connected with the main machine 2, the rear end of the thrust shaft is fixed with a thrust shaft flange 31 and is connected with the intermediate shaft 4 through the thrust shaft flange 31, the thrust bearing bears the thrust transmitted by the thrust shaft when the propeller does work and transmits the thrust to the ship body through the thrust bearing, so that the ship body moves forwards or backwards; the propeller 7 is usually mounted on the stern of the vessel and is submerged; one end of a stern shaft 5 is connected with the intermediate shaft 4, and the other end of the stern shaft penetrates through a stern shaft bearing 6 to extend out of the ship and be connected with the propeller so as to drive the propeller 7 to rotate.
The connection mode of the ship stern shaft is divided into a fixed type and a detachable type, the fixed type stern shaft has a simple structure and comprises a stern shaft body 51 and a stern shaft flange 52 positioned at the end part of the stern shaft body 51, and a plurality of stern shaft flange holes are formed in the stern shaft flange 52 in a penetrating way; the intermediate shaft 4 includes an intermediate shaft body 41, an intermediate shaft flange 42 located at an end portion of the intermediate shaft body 41, and an intermediate bearing 43, the intermediate shaft flange is provided with a plurality of intermediate shaft flange holes in a penetrating manner, and coupling bolts (not shown) penetrate the stern shaft flange holes and the intermediate shaft flange holes to fixedly connect the stern shaft and the intermediate shaft. Referring to fig. 2-3, fig. 2 is a schematic view of a ship stern shaft dismounting process in the prior art 1, fig. 3 is a schematic view of a ship stern shaft dismounting process in the prior art 2, when a ship stern shaft system is dismounted, the coupling bolt needs to be firstly dismounted, the propeller 7 needs to be dismounted, the intermediate shaft 4 needs to be lifted out by a crane, then the ship body is provided with a moving track 81, a plurality of moving trolleys are arranged on the moving track 81 in a sliding manner, lifting lugs 82 are respectively arranged on the ship body and the moving track 81, and the stern shaft 5 is pulled out from the stern shaft bearing 6 by the cooperation of the moving trolleys 83, the lifting clamp rings 84, the lifting blocks 85 and the cloth belts 86.
For the stern shaft of a large ship, the weight of the stern shaft reaches nearly hundred tons, and because the contact surface of the stern shaft and the bearing of the stern shaft is made of tin alloy, the material is soft, and in the process of pulling out the stern shaft, the contact surface between the stern shaft and the bearing of the stern shaft can be damaged due to contact friction between the stern shaft and the bearing of the stern shaft, inertia impact and the like generated by a binding cloth belt to the stern shaft during pulling. In addition, in order to avoid the wearing and tearing of the binding cloth belt to the surface of the stern shaft, the binding can be carried out by adopting a fiber hanging belt, but the bound surface of the stern shaft is smooth, and when the axial tension reaches a certain degree, the risk of axial sliding exists.
The scheme that the ligature strap carries out the pulling can contact with stern axle flange angle limit, hookup bolt angle limit etc. easily at ligature and pulling in-process, and the ligature strap is cut through by comparatively sharp corner easily, causes the quality accident. Therefore, in order to avoid the contact between the cloth belt and the flange of the stern shaft, as shown in the figure, the lifting lug 82 is fixedly arranged at the end part of the moving track 81 above the stern shaft 5, and forms an included angle alpha with the pulling straight line of the binding point of the stern shaft and the central line of the shaft, and along with the pulling process of the stern shaft, the more the pulling part of the stern shaft is, the larger the included angle alpha is, the smaller the actual pulling force is, and the more difficult the pulling operation is.
Disclosure of Invention
Based on this, the invention aims to provide a screw shaft dismounting tool which has the advantages of being firmly fixed with a screw shaft to be dismounted and being capable of improving the stability of pulling-out operation.
A stern shaft dismounting tool comprises a pull rod, a protective sleeve and two hoisting snap rings; the pull rod comprises a pull rod body and pull rod lifting lugs fixedly arranged at two ends of the pull rod body; the pull rod body is detachably and fixedly arranged in a screw shaft flange hole of a screw shaft to be detached in a penetrating manner; the protective sleeve is sleeved on the pull rod body and is positioned between the pull rod body and the stern shaft flange hole; and the two hoisting clamp rings are respectively hinged and fixed with the two pull rod lifting lugs.
According to the stern shaft dismounting tool, the pull rod body is detachably fixed in the stern shaft flange hole, the hoisting clamp rings are hinged and fixed at two ends of the pull rod body, acting force can be applied to the hoisting clamp rings, acting force can be further applied to the stern shaft, the stern shaft can be pulled out from a stern shaft bearing, the stern shaft dismounting tool is good in fixing stability, the problem that due to the fact that the cloth belts are used for binding, looseness is caused, and potential safety hazards exist can be avoided, meanwhile, the problem that due to the fact that the cloth belts are used for directly binding the stern shaft, inertia impact is caused when the stern shaft is pulled is avoided, and further the contact surface of the stern shaft bearing and the stern shaft is damaged; in addition, the rigid contact between the pull rod body and the flange hole of the stern shaft is avoided through the arrangement of the protective sleeve, and the damage to the flange hole of the stern shaft is effectively avoided.
Further, the device also comprises a locking nut; the outer side surface of one end of the pull rod body is convexly provided with a stop flange, and the outer side surface of the other end of the pull rod body is provided with a thread matched with the locking nut; the length of the pull rod body is greater than that of the stern shaft flange hole, and the outer diameters of the stop flange and the locking nut are both greater than the inner diameter of the stern shaft flange hole; the locking nut is sleeved on the pull rod body and is positioned on one side, facing the pull-out direction of the stern shaft, of the stern shaft flange. The locking nut is fixed through matching of the threads, the locking nut is firm in fixation, axial sliding is not prone to occurring in the pulling-out process, and the locking nut is high in stability and good in safety.
Further, the number of protective sleeves is 2; the protective sleeve is in a hollow cylindrical shape and comprises a first protective section and a second protective section which are fixedly connected; the inner diameters of the first protection section and the second protection section are matched with the outer diameter of the pull rod body, the outer diameter of the first protection section is matched with the inner diameter of a stern shaft flange hole of a stern shaft to be disassembled, and the length of the first protection section is not more than one half of the length of the stern shaft flange hole of the stern shaft to be disassembled; the outer diameter of the second protection section is larger than that of the first protection section, and the end of the second protection section is abutted to the stop flange or the lock nut. Through the setting of two protective sheaths, can avoid the pull rod body with stern shaft flange hole the locking flange with stern shaft flange and lock nut with rigidity contact between the stern shaft flange avoids stern shaft flange and stern shaft flange hole is impaired, protective sheath easy dismounting can adapt to the stern shaft flange hole of different length simultaneously, changes the protective sheath of different external diameters and can correspond different internal diameter size's stern shaft flange hole, has the commonality to different boats and ships.
Furthermore, a gasket is also included; the protective sleeve is in a hollow cylindrical shape and comprises a first protective section and a second protective section fixedly arranged at one end of the protective sleeve body, the outer diameter of the first protective section is matched with the inner diameter of a stern shaft flange hole of a stern shaft to be dismounted, and the length of the first protective section is not more than that of the stern shaft flange hole of the stern shaft to be dismounted; the outer diameter of the second protection section is larger than that of the first protection section, and the second protection section is abutted to the stop flange; the gasket is sleeved on the pull rod body and is positioned between the locking nut and the stern shaft flange. Because the influence of pulling direction, lock nut with effort between the stern shaft flange is less, uses the protective sheath to avoid the pull rod body with stern shaft flange hole and the locking flange with rigid contact between the stern shaft flange uses the gasket to avoid lock nut with rigid contact between the stern shaft flange helps reduce cost.
Further, the protective sheath is the nylon finished piece, and the protection is respond well and the dead weight is lighter.
Furthermore, the gasket is a paper sheet gasket, so that the cost is low.
According to the stern shaft dismounting tool, the pull rod body is detachably fixed in the stern shaft flange hole, the hoisting clamp rings are hinged and fixed at two ends of the pull rod body, acting force can be applied to the hoisting clamp rings, then acting force is applied to the stern shaft, the stern shaft is pulled out from a stern shaft bearing, the fixing mode of the stern shaft bearing is limited in an optimal implementation mode, the fixing stability of the stern shaft dismounting tool is good, the problem that looseness is likely to occur when the cloth belts are used for binding the stern shaft and potential safety hazards exist can be avoided, meanwhile, the problem that the cloth belts generate inertia impact when the stern shaft bearing and the stern shaft are pulled due to the fact that the cloth belts are directly used for binding the stern shaft is avoided, and further the contact surface of the stern shaft bearing and the stern shaft is damaged; in addition, rigid contact between the pull rod body and the stern shaft flange hole is avoided through the arrangement of the protective sleeve, damage to the stern shaft flange hole is effectively avoided, meanwhile, universality on stern shaft flange holes with different sizes is achieved through replacement of protective sleeves with different sizes, and the requirements of different ships are met; in addition, the pull rod, the stern shaft flange and the stern shaft flange hole are fully protected by the arrangement of the two protective sleeves or the protective sleeves matched with the gasket.
In addition, the embodiment of the invention also provides a stern shaft dismounting method, which uses the stern shaft dismounting tool for dismounting and specifically comprises the following steps:
1) dismantling a connecting bolt between a stern shaft flange and a middle shaft flange of a stern shaft to be dismantled, dismantling a middle shaft and hoisting the middle shaft away;
2) a moving track is arranged on the ship body right above the stern shaft along the pulling-out direction of the stern shaft; a movable trolley is slidably arranged on the movable guide rail, a balance hoisting block is fixed on the movable trolley, and the bottom of the balance hoisting block is bound and fixed with the stern shaft through a first hanging strip;
3) fixedly penetrating the screw shaft disassembling tool into the screw shaft flange hole; fixing a first lifting lug and a second lifting lug on the ship body, wherein the first lifting lug is positioned in front of the stern shaft and the second lifting lug is positioned behind the stern shaft along the pulling direction of the stern shaft; respectively fixed first hoist block and second hoist block on first lug and the second lug will first hoist block and second hoist block respectively through the second suspender with the jack-up snap ring at stern axle dismantlement frock both ends is connected, utilizes first hoist block to tighten up the operation afterwards, and the cooperation second hoist block loosens the operation, will the stern axle certainly pull out in the stern axle bearing.
According to the method for disassembling the stern shaft, the stern shaft is disassembled by using the stern shaft disassembling tool, the stern shaft is stably and firmly fixed and is not easy to loosen or slide, the stability in the pulling-out process is good, the safety is high, the problem that the quality safety accident is caused because the cloth belt is broken due to the fact that the cloth belt is in contact with the corner of a flange of the stern shaft and the cloth belt is directly bound and fixed in the pulling process can be avoided, and due to the arrangement of the first lifting lug, the included angle formed by the pulling straight line of the first lifting lug fixing point and the stern shaft fixing point and the center line of the stern shaft is small, the pulling force can be fully utilized, and the pulling-out operation of the stern shaft is more labor-; in addition, the cooperation of first hoist block and second hoist block, two hoist blocks are right the effort that the frock was dismantled to the stern shaft is applyed is opposite, can avoid using single hoist block right when the frock is dismantled to the stern shaft carries out the pulling operation, the stern shaft atress slides forward and because inertia strikes forward, has the problem of potential safety hazard, makes the stern shaft is stable forward, effectively improves the stability of pulling out the process.
Further, the movable trolley comprises a first movable trolley and a second movable trolley, a first balance hoisting block is fixed on the first movable trolley, a second balance hoisting block is fixed on the second movable trolley, and the first balance hoisting block and the second balance hoisting block are bound and fixed with the stern shaft through a first hanging strip; in the process of pulling out the stern shaft, the position where the second balance hoisting block is bound and fixed with the stern shaft is not required to be adjusted continuously, so that the stern shaft is kept balanced, the balance of the stern shaft in the pulling process is kept, and safety accidents are avoided.
Furthermore, the first lifting lug is fixedly arranged on the main engine or a thrust shaft flange, and the second lifting lug is fixedly arranged on the ship body above the stern shaft bearing, so that the fixed point of the first lifting lug is approximately parallel to the pulling straight line of the stern shaft and the central line of the stern shaft, and the pulling operation is more labor-saving.
For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a marine shafting configuration;
FIG. 2 is a schematic view of a ship stern shaft disassembling process in the prior art 1;
FIG. 3 is a schematic view of a ship stern shaft dismounting process in the prior art 2;
fig. 4 is a schematic structural view of a pull rod according to embodiment 1 of the present invention;
fig. 5 is a schematic structural view of a screw shaft dismounting tool in embodiment 1 of the present invention;
fig. 6 is a schematic view of an assembly structure of a screw shaft disassembling tool according to embodiment 1 of the present invention;
fig. 7 is a schematic view of an assembly structure of a screw shaft disassembling tool according to embodiment 2 of the present invention;
fig. 8 is a schematic view of a dismounting process of a screw shaft dismounting method according to embodiment 3 of the present invention 1;
fig. 9 is a schematic view 2 illustrating a disassembling process of a screw shaft disassembling method according to embodiment 3 of the present invention.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Example 1
Referring to fig. 4-6, fig. 4 is a schematic structural view of a tie rod in embodiment 1 of the present invention, fig. 5 is a schematic structural view of a screw shaft disassembling tool in embodiment 1 of the present invention, and fig. 6 is a schematic structural view of a screw shaft disassembling tool in embodiment 1 of the present invention.
As shown in the drawings, embodiment 1 of the present invention provides a stern shaft dismounting tool 1, which includes a pull rod 11, a protective sleeve 12 and two lifting snap rings 13; the pull rod 11 comprises a pull rod body 112 and pull rod lifting lugs 114 fixedly arranged at two ends of the pull rod body 112; the pull rod body 112 is detachably and fixedly arranged in a screw shaft flange hole 53 of the screw shaft to be detached in a penetrating way; the protective sleeve 12 is sleeved on the pull rod body 112 and is positioned between the pull rod body 112 and the stern shaft flange hole 53; the two lifting snap rings 13 are respectively hinged and fixed with the two pull rod lifting lugs 114.
According to the screw shaft dismounting tool in the embodiment 1, the pull rod body is detachably fixed in the screw shaft flange hole 53, the hoisting snap rings are hinged and fixed at two ends of the pull rod body, acting force can be applied to the hoisting snap rings, acting force can be further applied to the screw shaft, the screw shaft is pulled out from the screw shaft bearing, the screw shaft dismounting tool is good in fixing stability, the problem that the looseness possibly occurs when the cloth belts are used for binding can be avoided, the potential safety hazard exists, meanwhile, the problem that the cloth belts generate inertia impact when the screw shaft is pulled due to the fact that the cloth belts are directly used for binding the screw shaft is avoided, and further the contact surface between the screw shaft bearing and the screw shaft is damaged; in addition, the rigid contact between the pull rod body and the flange hole of the stern shaft is avoided through the arrangement of the protective sleeve, and the damage to the flange hole of the stern shaft is effectively avoided.
As an optional implementation mode, the screw shaft dismounting tool further comprises a locking nut 14; the outer side surface of one end of the pull rod body 112 is convexly provided with a stop flange 116, and the outer side surface of the other end is provided with a thread matched with the locking nut 14; the length of the pull rod body 112 is larger than that of the stern shaft flange hole 53, and the outer diameters of the stop flange 116 and the lock nut 14 are larger than the inner diameter of the stern shaft flange hole 53; the lock nut 14 is sleeved on the pull rod body 112 and is located on one side of the stern shaft flange 52 facing the pull-out direction of the stern shaft. Through the cooperation of screw thread and lock nut 14 fixed, fixed firm and difficult emergence axial slip in the pull-out process, stability is high and the security is good.
As an alternative embodiment, in this embodiment, the number of protective sleeves 12 is 2; the protective sleeve 12 is in a hollow cylindrical shape and comprises a first protective section 121 and a second protective section 122 which are fixedly connected; the inner diameters of the first protection section 121 and the second protection section 122 are matched with the outer diameter of the pull rod body 112, the outer diameter of the first protection section 121 is matched with the inner diameter of a stern shaft flange hole 53 of a stern shaft to be disassembled, and the length of the first protection section is not more than one half of the length of the stern shaft flange hole 53 of the stern shaft to be disassembled; the second protection segment 122 has an outer diameter larger than that of the first protection segment 121, and its end abuts against the stop flange 116 or the lock nut 14. Through the setting of two protective sheaths 12, can avoid the rigid contact between pull rod body 112 and stern shaft flange hole 53, locking flange 116 and stern shaft flange 52 and lock nut 14 and stern shaft flange 52, avoid stern shaft flange 52 and stern shaft flange hole 53 surface impaired, protective sheath 12 easy dismounting can adapt to the stern shaft flange hole 53 of different length simultaneously, the protective sheath 12 of changing different external diameters can correspond different internal diameter size's stern shaft flange hole 53, have the commonality to different boats and ships.
Further, protective sheath 12 is the nylon finished piece, and the protection is respond well and the dead weight is lighter.
Example 2
Referring to fig. 7, fig. 7 is a schematic view of an assembly structure of a screw shaft dismounting tool according to embodiment 2 of the present invention. As shown in the drawings, embodiment 2 of the present invention provides a stern shaft dismounting tool, which is different from embodiment 1 in that: a gasket 60 is also included; the number of the protective sleeves 12 is 1, the protective sleeves are hollow cylindrical and comprise first protective sections 121 and second protective sections 122 fixedly arranged at one ends of bodies of the protective sleeves 12, the outer diameter of each first protective section 121 is matched with the inner diameter of a stern shaft flange hole 53 of a stern shaft to be dismounted, and the length of each first protective section is not more than that of the stern shaft flange hole 53 of the stern shaft to be dismounted; the outer diameter of the second protection section 122 is larger than that of the first protection section 121, and the second protection section abuts against the stop flange 116; the washer 60 is sleeved on the tie rod body 112 and is located between the lock nut 14 and the stern shaft flange. Further, the gasket 60 is a paper-skin gasket, so that the cost is low.
Due to the influence of the pulling direction, the acting force between the locking nut 14 and the stern shaft flange 52 is small, the protective sleeve 12 is used for avoiding the rigid contact between the pull rod body 112 and the stern shaft flange hole 53 and between the stop flange 116 and the stern shaft flange, the gasket 60 is used for avoiding the rigid contact between the locking nut 14 and the stern shaft flange 52, and the cost is reduced.
According to the stern shaft dismounting tool, the pull rod body is detachably fixed in the stern shaft flange hole, the hoisting clamp rings are hinged and fixed at two ends of the pull rod body, acting force can be applied to the hoisting clamp rings, then acting force is applied to the stern shaft, the stern shaft is pulled out from a stern shaft bearing, the fixing mode of the stern shaft bearing is limited in an optimal implementation mode, the fixing stability of the stern shaft dismounting tool is good, the problem that looseness is likely to occur when the cloth belts are used for binding the stern shaft and potential safety hazards exist can be avoided, meanwhile, the problem that the cloth belts generate inertia impact when the stern shaft bearing and the stern shaft are pulled due to the fact that the cloth belts are directly used for binding the stern shaft is avoided, and further the contact surface of the stern shaft bearing and the stern shaft is damaged; in addition, rigid contact between the pull rod body and the stern shaft flange hole is avoided through the arrangement of the protective sleeve, damage to the stern shaft flange hole is effectively avoided, meanwhile, universality on stern shaft flange holes with different sizes is achieved through replacement of protective sleeves with different sizes, and the requirements of different ships are met; in addition, the pull rod, the stern shaft flange and the stern shaft flange hole are fully protected by the arrangement of the two protective sleeves or the protective sleeves matched with the gasket.
Example 3
Referring to fig. 8-9, fig. 8 is a schematic view of a dismounting process of a screw shaft dismounting method according to embodiment 3 of the present invention 1, and fig. 9 is a schematic view of a dismounting process of a screw shaft dismounting method according to embodiment 3 of the present invention 2. The embodiment 3 of the invention provides a method for disassembling a screw shaft, which is used for disassembling by using the screw shaft disassembling tool, and specifically comprises the following steps:
1) removing a connecting bolt (not shown) between a stern shaft flange 52 and an intermediate shaft flange 42 of the stern shaft to be removed, removing the intermediate shaft 4 and lifting off the intermediate shaft 4 by using a crane;
2) a moving track 81 is arranged on the hull right above the stern shaft 5 along the pulling-out direction of the stern shaft 5; a moving trolley 83 is slidably arranged on the moving track 81, a balance hoisting block 84 is fixed on the moving trolley 83, the bottom of the balance hoisting block 84 is bound and fixed on the stern shaft 5 through a first hanging strip 86 and acts on the stern shaft 5 to keep the balance of the stern shaft 5;
3) fixedly penetrating the screw shaft disassembling tool 1 into a screw shaft flange hole 53; a first lifting lug 33 and a second lifting lug 34 are fixed on the ship body, and along the pulling direction of the stern shaft, the first lifting lug 33 is positioned in front of the stern shaft 5, and the second lifting lug 34 is positioned behind the stern shaft 5; fixing a first lifting block 35 and a second lifting block 36 on the first lifting lug 33 and the second lifting lug 34 respectively, connecting the first lifting block 35 and the second lifting block 36 with the lifting clamp rings 13 at the two ends of the stern shaft dismounting tool through second hanging strips 32 respectively, and then tightening the first lifting block 35 to be matched with the second lifting block 36 to be loosened so as to pull out the stern shaft 5 from the stern shaft bearing 6.
Further, the moving trolley 83 includes a first moving trolley 832 and a second moving trolley 834, a first balance hoist 842 is fixed on the first moving trolley 832, a second balance hoist 844 is fixed on the second moving trolley 834, and both the first balance hoist 842 and the second balance hoist 844 are bound and fixed with the stern shaft 5 through the first sling 86.
Before the stern shaft 5 is pulled, the first balance hoisting block 842 is bound and fixed with the stern shaft 5 through the first hanging strip 86 and acts on the stern shaft 5, so that the front section of the stern shaft 5 is lifted to be just separated from the bottom of the stern shaft bearing 6, and the sliding friction between the stern shaft 5 and the stern shaft bearing 6 is reduced. When the length of the pulled-out part of the stern shaft 5 is half of the total length of the stern shaft 5, the second balance hoisting block 844 is bound and fixed with the stern shaft 5 through the hanging strip 86 and acts on the stern shaft 5, so that the rear section of the stern shaft 5 is lifted to be just separated from the bottom of the stern shaft bearing 6, and sliding friction between the stern shaft 5 and the stern shaft bearing 6 is reduced.
When the length of the pulled-out part of the stern shaft 5 exceeds half of the total length of the stern shaft 5, the pulling operation is stopped, the second balance hoisting block 844 and the stern shaft 5 are loosened, the position of the second moving trolley 834 is moved backwards along the pulling-out direction of the stern shaft, and then the binding and fixing position of the second balance hoisting block 844 and the stern shaft 5 is changed, so that the stern shaft 5 is in a balanced state. With the continuous pulling out of the stern shaft 5, the position of the second moving trolley 834 needs to be continuously moved, and then the binding position of the second balance hoisting block 844 and the stern shaft 5 is continuously changed, so that the balance of the stern shaft 5 in the pulling process is kept, and safety accidents are avoided.
Further, the first lifting lug 33 is fixedly arranged on the main machine 2 or the thrust shaft flange 31, in this embodiment, in order to be fixed on the thrust shaft flange, the second lifting lug 34 is fixedly arranged on the hull above the stern shaft bearing 6, so that the fixed point of the first lifting lug 33 and the pulling straight line of the stern shaft 5 are approximately parallel to the centerline of the stern shaft, and the pulling operation is more labor-saving.
According to the method for disassembling the stern shaft, the stern shaft is disassembled by using the stern shaft disassembling tool, the stern shaft is stably and firmly fixed and is not easy to loosen or slide, the stability in the pulling-out process is good, the safety is high, the problem that the quality safety accident is caused because the cloth belt is broken due to the fact that the cloth belt is in contact with the corner of a flange of the stern shaft and the cloth belt is directly bound and fixed in the pulling process can be avoided, and due to the arrangement of the first lifting lug, the included angle formed by the pulling straight line of the first lifting lug fixing point and the stern shaft fixing point and the center line of the stern shaft is small, the pulling force can be fully utilized, and the pulling-out operation of the stern shaft is more labor; in addition, the cooperation of first hoist block and second hoist block, two hoist blocks are right the effort that the frock was dismantled to the stern shaft is applyed is opposite, can avoid using single hoist block right when the frock is dismantled to the stern shaft carries out the pulling operation, the stern shaft atress slides forward and because inertia strikes forward, has the problem of potential safety hazard, makes the stern shaft is stable forward, effectively improves the stability of pulling out the process.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
1. The utility model provides a frock is dismantled to stern axle which characterized in that: comprises a pull rod, a protective sleeve and two hoisting snap rings; the pull rod comprises a pull rod body and pull rod lifting lugs fixedly arranged at two ends of the pull rod body; the pull rod body is detachably and fixedly arranged in a screw shaft flange hole of a screw shaft to be detached in a penetrating manner; the protective sleeve is sleeved on the pull rod body and is positioned between the pull rod body and the stern shaft flange hole; and the two hoisting clamp rings are respectively hinged and fixed with the two pull rod lifting lugs.
2. The stern shaft dismounting tool according to claim 1, wherein: the locking nut is also included; the outer side surface of one end of the pull rod body is convexly provided with a stop flange, and the outer side surface of the other end of the pull rod body is provided with a thread matched with the locking nut; the length of the pull rod body is greater than that of the stern shaft flange hole, and the outer diameters of the stop flange and the locking nut are both greater than the inner diameter of the stern shaft flange hole; the locking nut is sleeved on the pull rod body and is positioned on one side, facing the pull-out direction of the stern shaft, of the stern shaft flange.
3. The stern shaft dismounting tool according to claim 2, wherein: the number of the protective sleeves is 2; the protective sleeve is in a hollow cylindrical shape and comprises a first protective section and a second protective section which are fixedly connected; the inner diameters of the first protection section and the second protection section are matched with the outer diameter of the pull rod body, the outer diameter of the first protection section is matched with the inner diameter of a stern shaft flange hole of a stern shaft to be disassembled, and the length of the first protection section is not more than one half of the length of the stern shaft flange hole of the stern shaft to be disassembled; the outer diameter of the second protection section is larger than that of the first protection section, and the end of the second protection section is abutted to the stop flange or the lock nut.
4. The stern shaft dismounting tool according to claim 2, wherein: also comprises a gasket; the protective sleeve is in a hollow cylindrical shape and comprises a first protective section and a second protective section which are fixedly connected; the inner diameters of the first protection section and the second protection section are matched with the outer diameter of the pull rod body, the outer diameter of the first protection section is matched with the inner diameter of a stern shaft flange hole of a stern shaft to be disassembled, and the length of the first protection section is not more than that of the stern shaft flange hole of the stern shaft to be disassembled; the outer diameter of the second protection section is larger than that of the first protection section, and the second protection section is abutted to the stop flange; the gasket is sleeved on the pull rod body and is positioned between the locking nut and the stern shaft flange.
5. The stern shaft dismounting tool according to claim 3, wherein: the protective sleeve is a nylon part.
6. The stern shaft dismounting tool according to claim 4, wherein: the gasket is a paper skin gasket.
7. A method for disassembling a screw shaft, which is characterized in that the screw shaft disassembling tool of any one of claims 1 to 6 is used for disassembling, and comprises the following steps:
1) dismantling a connecting bolt between a stern shaft flange and a middle shaft flange of a stern shaft to be dismantled, dismantling a middle shaft and hoisting the middle shaft away;
2) a moving track is arranged on the ship body right above the stern shaft along the pulling-out direction of the stern shaft; a movable trolley is slidably arranged on the movable guide rail, a balance hoisting block is fixed on the movable trolley, and the bottom of the balance hoisting block is bound and fixed with the stern shaft through a first hanging strip;
3) fixedly penetrating the screw shaft disassembling tool into the screw shaft flange hole; fixing a first lifting lug and a second lifting lug on the ship body, wherein the first lifting lug is positioned in front of the stern shaft and the second lifting lug is positioned behind the stern shaft along the pulling direction of the stern shaft; respectively fixed first hoist block and second hoist block on first lug and the second lug will first hoist block and second hoist block respectively through the second suspender with the jack-up snap ring at stern axle dismantlement frock both ends is connected, utilizes first hoist block to tighten up the operation afterwards, and the cooperation second hoist block loosens the operation, will the stern axle certainly pull out in the stern axle bearing.
8. The method of dismounting a stern shaft according to claim 7, wherein: the movable trolley comprises a first movable trolley and a second movable trolley, a first balance hoisting block is fixed on the first movable trolley, a second balance hoisting block is fixed on the second movable trolley, and the first balance hoisting block and the second balance hoisting block are bound and fixed with the stern shaft through a first hanging strip; in the process of pulling out the stern shaft, the binding and fixing position of the second balance hoisting block and the stern shaft is not required to be adjusted continuously, so that the stern shaft is kept balanced.
9. The method of dismounting a stern shaft according to claim 7, wherein: the first lifting lug is fixedly arranged on the main engine or the thrust shaft flange, and the second lifting lug is fixedly arranged on the ship body above the stern shaft bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010474662.8A CN111689416B (en) | 2020-05-29 | 2020-05-29 | Stern shaft dismounting tool and stern shaft dismounting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010474662.8A CN111689416B (en) | 2020-05-29 | 2020-05-29 | Stern shaft dismounting tool and stern shaft dismounting method |
Publications (2)
| Publication Number | Publication Date |
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| CN111689416A true CN111689416A (en) | 2020-09-22 |
| CN111689416B CN111689416B (en) | 2022-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010474662.8A Active CN111689416B (en) | 2020-05-29 | 2020-05-29 | Stern shaft dismounting tool and stern shaft dismounting method |
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| Country | Link |
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| CN (1) | CN111689416B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112498626A (en) * | 2020-11-11 | 2021-03-16 | 南通中远海运川崎船舶工程有限公司 | Method for disassembling propeller shaft of ultra-large container ship |
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| JPS6022583A (en) * | 1983-07-14 | 1985-02-05 | Mitsubishi Heavy Ind Ltd | Method of attaching and detaching propeller shaft of ship |
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| CN207241996U (en) * | 2017-08-25 | 2018-04-17 | 上海外高桥造船有限公司 | Ten thousand casees ship installs stern tube shaft dummy shaft |
| CN208451482U (en) * | 2017-11-20 | 2019-02-01 | 沪东中华造船(集团)有限公司 | A kind of auxiliary tool for screw shaft of ship dismounting operation |
| CN110774224A (en) * | 2019-10-31 | 2020-02-11 | 东台友铭船舶配件有限公司 | Positioning type stern tube bearing dismounting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6022583A (en) * | 1983-07-14 | 1985-02-05 | Mitsubishi Heavy Ind Ltd | Method of attaching and detaching propeller shaft of ship |
| CN102674138A (en) * | 2012-05-19 | 2012-09-19 | 曹先锋 | Marine screw shaft hoisting tool |
| CN104002954A (en) * | 2014-06-16 | 2014-08-27 | 桂平市大众船舶修造厂 | Vessel tail shaft device |
| CN205524912U (en) * | 2016-02-24 | 2016-08-31 | 国营海东造船厂 | Boats and ships stern shaft connecting structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112498626A (en) * | 2020-11-11 | 2021-03-16 | 南通中远海运川崎船舶工程有限公司 | Method for disassembling propeller shaft of ultra-large container ship |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111689416B (en) | 2022-07-22 |
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