CN114701619A - Main engine positioning and mounting method based on block construction - Google Patents
Main engine positioning and mounting method based on block construction Download PDFInfo
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- CN114701619A CN114701619A CN202210229761.9A CN202210229761A CN114701619A CN 114701619 A CN114701619 A CN 114701619A CN 202210229761 A CN202210229761 A CN 202210229761A CN 114701619 A CN114701619 A CN 114701619A
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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
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/20—Building or assembling prefabricated vessel modules or parts other than hull blocks, e.g. engine rooms, rudders, propellers, superstructures, berths, holds or tanks
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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
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/60—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by the use of specific tools or equipment; characterised by automation, e.g. use of robots
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Abstract
The invention provides a main machine positioning and mounting method based on block construction, which comprises the steps of firstly determining the mounting position of a main thrust bearing by adopting a shafting stay line lighting method, then primarily determining the position of a main reduction gear device, then primarily determining the mounting position of a main machine, carrying out retest centering on the main reduction gear device and the main machine after shafting load adjustment, and finally determining the mounting positions of the main reduction gear device and the main machine so as to complete the mounting of the main machine. Meanwhile, the vibration isolators are pre-pressed for a period of time and then adjusted and installed, so that system deviation caused by deformation generated by direct installation is avoided. The method solves the problems of large number of shaft system centering active points and high difficulty in shaft system load adjustment during the installation of the host, shortens the construction time of the project, improves the ship construction efficiency, is safe and efficient by using feedback method on site, effectively reduces the site construction risk, and provides guarantee for the smooth completion of the project node.
Description
Technical Field
The invention relates to the technical field of ship construction, in particular to a main engine positioning and mounting method based on block construction.
Background
The block construction method is an advanced ship construction technology in the global scope at present, and is particularly suitable for the construction of large civil ships.
At present, the installation method of the main engine of the large-scale ship is generally as follows: after the huge segments of the ship body are folded, the stay wire illumination is carried out, the main reducing gear device is firstly positioned, and then the main machine is positioned by taking the main reducing gear device as a reference. The method has obvious defects that: because the main reduction gear is elastic installation, namely install the isolator in the middle of main reduction gear and the base, and the isolator needs the pre-compaction, the influence factor of its compression capacity is including the physical characteristic of isolator, the temperature, the pressurized time, pressurized weight etc., consequently, before the host computer installation, the great change can appear in main reduction gear's position, will lead to compelling the position of adjusting host computer and shafting relevant equipment like this, it is many to appear shafting centering movable point, the big problem of the shafting load adjustment degree of difficulty, and then influence host computer installation effectiveness, influence the smooth completion of engineering node.
Disclosure of Invention
In view of the defects of the prior art, the invention provides the main engine positioning and mounting method based on the block construction, which is simple to operate and convenient to mount, so that the main engine is efficiently mounted, the difficulty in adjusting the shafting load is reduced, and the construction period of the ship is shortened.
In order to achieve the above and other related objects, the present invention provides a method for positioning and installing a main frame based on block construction, comprising the steps of:
s101: preliminarily positioning the main thrust bearing;
s102: preliminarily centering and positioning a main reduction gear device to enable the main reduction gear device and a main thrust bearing to meet the requirement of center line centering;
s103: preliminarily centering and positioning a main machine to enable the main machine and the main reduction gear device to meet the requirement of center line centering;
s104: preliminarily installing a sound insulation coupler between the main reduction gear device and the main thrust bearing, adjusting the shafting load, and finally positioning the main thrust bearing;
s105: re-testing and centering, namely after mounting vibration isolators on a main reduction gear device base and a host machine base, respectively placing the host machine and the main reduction gear device on the vibration isolators for prepressing for a period of time, checking whether the centering condition of the host machine and an input shaft of the main reduction gear device and the offset of the main reduction gear device and a sound insulation coupling meet the centering requirement or not, and if not, using relevant tools including adjusting screws until the centering requirement is met;
s106: and installing and fixing the main reduction gear device and the main machine.
Preferably, step S101 specifically includes:
through the irradiation of a pull wire, the deviation data of the light target of the main thrust bearing and the central line is observed and recorded, the position of the main thrust bearing is preliminarily adjusted, so that the center of the light target of the main thrust bearing passes through the center of an irradiator, the deviation between the light target and the irradiator is not more than 0.1mm, and if the deviation does not meet the requirement, the position of the main thrust bearing needs to be readjusted, so that the centers of the front and rear light targets of the main thrust bearing pass through the center of the irradiator; measuring and preliminarily preparing an adjusting gasket matched with the main thrust bearing according to the actual position of the main thrust bearing, drilling a mounting hole on a base of the main thrust bearing, screwing a bolt as required, and preliminarily positioning the main thrust bearing.
Preferably, step S102 specifically includes:
hoisting the main reduction gear device by adopting a hoisting mode, and carrying out rigid preliminary centering on the main reduction gear device and the main thrust bearing; firstly, a wood cushion block with proper height is placed on a base of a main reduction gear device, the main reduction gear device is hoisted and placed on the wood cushion block of the base of the main reduction gear device, and the position of the main reduction gear device is adjusted by utilizing an oil cylinder or a jacking bolt and a lateral adjusting screw, so that the center of an output flange of the main reduction gear device is smoothly butted with the center of an input flange of a main thrust bearing, and the main reduction gear device and the main thrust bearing are ensured to meet the requirement of center line centering.
Preferably, step S103 specifically includes:
the main machine and the main reduction gear device are subjected to rigid primary centering in a hoisting mode, the position of the main machine is adjusted by using an oil cylinder or a jacking bolt and a lateral adjusting screw, so that the main machine corresponds to a positioning bolt hole between the main reduction gear device, and the main machine is connected with the main reduction gear device by using a bolt.
Preferably, the process of connecting the main machine and the main reduction gear device specifically includes:
and adjusting the positions of the stern part and the bow part of the main machine to align the stern part mounting positioning hole of the main machine with the bow part mounting hole of the main reduction gear device, so that the main machine meets the centering requirement, meanwhile, the main machine is connected with the main reduction gear device by adopting a bolt for a non-hinged bolt hole, and the hinged hole is provided with a small-diameter bolt for temporary connection so as to fix the main machine.
Preferably, step S104 specifically includes:
and temporarily installing a sound insulation coupler by adopting a connecting bolt, measuring the loads of each intermediate bearing and the main thrust bearing, adjusting the height position of the intermediate bearing according to a measured value to enable a final measured value to meet the requirement, and finally positioning the position of the main thrust bearing.
Preferably, when shafting load measurement and adjustment are carried out, the load of the ship is not less than 85% of standard displacement, corresponding equipment including a main engine and a main reduction gear device in a shafting passing area is guaranteed to be in a falling position, and a ballast method is adopted to replace the missing equipment.
Preferably, step S106 specifically includes:
and S105, after the alignment is qualified after retesting, hoisting the main machine and the main reduction gear device, scribing lines on the main reduction gear device base and the main machine base, removing the vibration isolator, drilling holes on the corresponding base, resetting and installing the vibration isolator, reaming bolt holes according to requirements, installing a reaming bolt and a common bolt, and screwing a nut by using a spanner to finish the installation and fixation of the main reduction gear device and the main machine.
Preferably, in step S101, the time for placing the main machine and the final reduction gear device on the vibration isolators for prepressing is 72 hours.
Preferably, the main engine, the main reduction gear device, the sound insulation coupler, the main thrust bearing and the intermediate shaft are sequentially arranged along the fore-aft direction.
The invention provides a main machine positioning and mounting method based on block construction, which comprises the steps of firstly determining the mounting position of a main thrust bearing by adopting a shafting stay line lighting method, then primarily determining the position of a main reduction gear device, then primarily determining the mounting position of a main machine, carrying out retest centering on the main reduction gear device and the main machine after shafting load adjustment, and finally determining the mounting positions of the main reduction gear device and the main machine so as to finish the mounting of the main machine. Meanwhile, the vibration isolators are pre-pressed for a period of time and then adjusted and installed, so that system deviation caused by deformation generated by direct installation is avoided. The method adopts rigid installation for the main thrust bearing, adopts elastic installation for the main reduction gear device and the main machine, and adopts an installation mode that the main thrust bearing is gradually positioned to the main machine, thereby solving the problems of more number of shaft system centering active points and high difficulty in shaft system load adjustment when the main machine is installed, shortening the engineering construction time, improving the ship construction efficiency, simultaneously feeding back the method through field use, effectively reducing the field construction risk, and providing guarantee for the smooth completion of engineering nodes. Therefore, the present invention effectively overcomes various disadvantages of the prior art and has a high industrial utility value.
Drawings
Fig. 1 is a system configuration diagram of a host positioning installation according to an embodiment of the present invention.
Fig. 2 shows a flow chart of a host positioning installation according to an embodiment of the present invention.
Description of the element reference numerals
1 host
2 main reduction gear device
3 Sound insulation shaft coupling
4 main thrust bearing
5 middle shaft
6 main thrust bearing base
7 main reduction gear device base
8 host base
9 vibration isolator
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
As in the detailed description of the embodiments of the present invention, the cross-sectional views illustrating the device structures are not partially enlarged in general scale for convenience of illustration, and the schematic views are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
For convenience in description, spatial relational terms such as "below," "beneath," "below," "under," "over," "upper," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that these terms of spatial relationship are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the figures. Further, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present. As used herein, "between … …" is meant to include both endpoints.
In the context of this application, a structure described as having a first feature "on" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed in between the first and second features, such that the first and second features may not be in direct contact.
It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of each component in actual implementation may be changed freely, and the layout of the components may be more complicated.
As shown in fig. 1, the present invention provides a method for positioning and installing a main frame based on block construction, which comprises the following steps:
s101: the main thrust bearing 4 is preliminarily positioned.
Specifically, through the guy line illumination, the deviation data of the light target and the central line of the main thrust bearing 4 is observed and recorded, the position of the main thrust bearing 4 is preliminarily adjusted, so that the center of the light target of the main thrust bearing 4 passes through the center of the illumination instrument, the deviation between the light target and the illumination instrument is not more than 0.1mm, and if the deviation does not meet the requirement, the position of the main thrust bearing needs to be readjusted, so that the centers of the front light target and the rear light target of the main thrust bearing pass through the center of the illumination instrument; according to the actual position measurement of fixing a position main thrust bearing 4 and preliminary configuration with the adjusting shim of main thrust bearing 4 adaptation, join in marriage on main thrust bearing base 6 and bore the mounting hole, tighten the bolt as required, fix a position main thrust bearing 4 preliminarily.
In addition, before the ship is launched, the main thrust bearing 4, the main reduction gear device 2, the main machine 1 and the shafting related equipment are all hoisted to the engine room; after the ship is launched, the stay wire is illuminated, and then the step S101 is performed to preliminarily position the main thrust bearing.
S102: and preliminarily centering and positioning the main reduction gear device 2, so that the main reduction gear device 2 and the main thrust bearing 4 meet the requirement of center line centering.
And hoisting the main reduction gear device 2 by adopting a hoisting mode, and performing rigid primary centering on the main reduction gear device and the main thrust bearing 4. Specifically, a wood pad block with a proper height is placed on a main reduction gear device base 7, the main reduction gear device 2 is hoisted and placed on the wood pad block of the main reduction gear device base 7, the position of the main reduction gear device 2 is adjusted by an oil cylinder or a jacking bolt and a lateral adjusting screw, so that the center of an output flange of the main reduction gear device 2 is smoothly butted with the center of an input flange of a main thrust bearing 4, and the main reduction gear device 2 and the main thrust bearing 4 meet the requirement of center line centering.
S103: and preliminarily centering and positioning the main engine 1, so that the main engine 1 and the main reduction gear device 2 meet the requirement of center line centering.
Similarly to the step S102, the main body 1 and the main reduction gear device 2 are rigidly preliminarily centered by a hoisting method. Specifically, the position of the main machine 1 is adjusted by using an oil cylinder or a jacking bolt and a lateral adjusting screw, so that a positioning bolt hole between the main machine 1 and the main reduction gear device 2 corresponds to each other, and the main machine 1 and the main reduction gear device 2 are connected by using a bolt. Specifically, the positions of the stern part and the bow part of the main machine 1 are adjusted, so that the stern part of the main machine 1 is aligned with the bow part mounting hole of the main reduction gear device 2 according to the mounting positioning hole, the main machine meets the centering requirement, meanwhile, the main machine 1 is connected with the main reduction gear device 2 through bolts for non-hinged bolt holes, and the hinged holes are provided with small-diameter bolts for temporary connection so as to fix the main machine.
S104: and adjusting the shafting load, and finally positioning the position of the main thrust bearing 4.
And (3) temporarily installing the sound insulation coupler 3 by adopting a connecting bolt, measuring the load of each intermediate bearing and the main thrust bearing 4, adjusting the height position of the intermediate bearing according to a measured value to enable the final measured value to meet the requirement, and finally positioning the main thrust bearing 4.
It should be noted that, when shafting load measurement and adjustment are carried out, the load of the ship should be not less than 85% of the standard displacement, main and auxiliary equipment such as the main engine 1 and the main reduction gear device 2 of the ship with the shafting passing through the region should be located, and a ballast method can be adopted to replace the lacking equipment.
S105: and (5) retesting and centering.
After vibration isolators 9 are installed on the main speed reduction gear device base 7 and the main machine base 8, the main machine 1 and the main speed reduction gear device 2 are respectively placed on the vibration isolators 9 for prepressing for 72 hours, whether the centering condition of the input shafts of the main machine 1 and the main speed reduction gear device 2 and the offset of the main speed reduction gear device 2 and the sound insulation coupler 3 meet the centering requirement is checked, and if the requirement is not met, the positions of the main machine 1 and the main speed reduction gear device 2 are adjusted by using tools such as adjusting screws until the centering requirement is met.
S106: and installing the main reduction gear device and the main machine.
After the retest centering is qualified, the main machine 1 and the main reduction gear device 2 are hoisted, lines are marked on a main reduction gear device base 7 and a main machine base 8, holes are drilled on the corresponding bases after the vibration isolators 9 are removed, the vibration isolators 9 are reset and installed, bolt holes are reamed according to requirements, reamed bolts and ordinary bolts are installed, nuts are screwed by using a spanner, and the installation of the main reduction gear device and the main machine is completed.
The invention provides a main machine positioning and mounting method based on block construction, which comprises the steps of firstly determining the mounting position of a main thrust bearing by adopting a shafting stay line lighting method, then primarily determining the position of a main reduction gear device, then primarily determining the mounting position of a main machine, carrying out retest centering on the main reduction gear device and the main machine after shafting load adjustment, and finally determining the mounting positions of the main reduction gear device and the main machine so as to complete the mounting of the main machine. Meanwhile, the vibration isolators are pre-pressed for a period of time and then adjusted and installed, so that system deviation caused by deformation generated by direct installation is avoided. The method adopts rigid installation for the main thrust bearing, adopts elastic installation for the main reduction gear device and the main machine, and adopts an installation mode that the main thrust bearing is gradually positioned to the main machine, thereby solving the problems of more centering active points of a shafting and high difficulty in adjusting the shafting load when the main machine is installed, shortening the engineering construction time, improving the ship construction efficiency, simultaneously feeding back the method through field use, effectively reducing the field construction risk, and providing guarantee for the smooth completion of engineering nodes. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A main engine positioning and mounting method based on block construction is characterized by comprising the following steps:
s101: preliminarily positioning the main thrust bearing;
s102: preliminarily centering and positioning a main reduction gear device to enable the main reduction gear device and a main thrust bearing to meet the requirement of center line centering;
s103: preliminarily centering and positioning a main machine to enable the main machine and the main reduction gear device to meet the requirement of center line centering;
s104: preliminarily installing a sound insulation coupler between the main reduction gear device and the main thrust bearing, adjusting the shafting load, and finally positioning the main thrust bearing;
s105: re-testing and centering, namely after mounting vibration isolators on a main reduction gear device base and a main machine base, respectively placing the main machine and the main reduction gear device on the vibration isolators for prepressing for a period of time, checking whether the centering condition of the main machine and an input shaft of the main reduction gear device and the offset of the main reduction gear device and a sound insulation coupler meet the centering requirement, and if not, using related tools including adjusting screws until the centering requirement is met;
s106: and installing and fixing the main reduction gear device and the main machine.
2. The host positioning and installing method according to claim 1, wherein step S101 specifically includes:
through the irradiation of a pull wire, the deviation data of the light target of the main thrust bearing and the central line is observed and recorded, the position of the main thrust bearing is preliminarily adjusted, so that the center of the light target of the main thrust bearing passes through the center of an irradiator, the deviation between the light target and the irradiator is not more than 0.1mm, and if the deviation does not meet the requirement, the position of the main thrust bearing needs to be readjusted, so that the centers of the front and rear light targets of the main thrust bearing pass through the center of the irradiator; measuring and preliminarily preparing an adjusting gasket matched with the main thrust bearing according to the actual position of the main thrust bearing, drilling a mounting hole on a base of the main thrust bearing, screwing a bolt as required, and preliminarily positioning the main thrust bearing.
3. The method for positioning and installing the host computer according to claim 1, wherein step S102 specifically includes:
hoisting the main reduction gear device in a hoisting mode, and performing rigid primary centering on the main reduction gear device and the main thrust bearing; firstly, a wood cushion block with proper height is placed on a base of a main reduction gear device, the main reduction gear device is hoisted and placed on the wood cushion block of the base of the main reduction gear device, and the position of the main reduction gear device is adjusted by utilizing an oil cylinder or a jacking bolt and a lateral adjusting screw, so that the center of an output flange of the main reduction gear device is smoothly butted with the center of an input flange of a main thrust bearing, and the main reduction gear device and the main thrust bearing are ensured to meet the requirement of center line centering.
4. The host positioning and installing method according to claim 1, wherein step S103 specifically includes:
the main machine and the main reduction gear device are subjected to rigid primary centering in a hoisting mode, the position of the main machine is adjusted by using an oil cylinder or a jacking bolt and a lateral adjusting screw, so that the main machine corresponds to a positioning bolt hole between the main reduction gear device, and the main machine is connected with the main reduction gear device by using a bolt.
5. The host positioning and mounting method according to claim 4, wherein the process of connecting the host and the main reduction gear device specifically comprises:
and adjusting the positions of the stern part and the bow part of the main machine to align the stern part mounting positioning hole of the main machine with the bow part mounting hole of the main reduction gear device, so that the main machine meets the centering requirement, meanwhile, the main machine is connected with the main reduction gear device by adopting a bolt for a non-hinged bolt hole, and the hinged hole is provided with a small-diameter bolt for temporary connection so as to fix the main machine.
6. The host positioning and installing method according to claim 1, wherein step S104 specifically includes:
and temporarily installing a sound insulation coupler by adopting a connecting bolt, measuring the loads of each intermediate bearing and the main thrust bearing, adjusting the height position of the intermediate bearing according to a measured value to enable a final measured value to meet the requirement, and finally positioning the position of the main thrust bearing.
7. The main engine positioning and mounting method according to claim 6, wherein when shafting load measurement and adjustment are carried out, the load of the ship is not less than 85% of standard displacement, corresponding equipment including the main engine and the main reduction gear device in a shafting passing area is ensured to be in a falling position, and a ballast method is adopted to replace the missing equipment.
8. The host positioning and installing method according to claim 1, wherein step S106 specifically includes:
and S105, after the alignment is qualified after retesting, hoisting the main machine and the main reduction gear device, scribing lines on the main reduction gear device base and the main machine base, removing the vibration isolator, drilling holes on the corresponding base, resetting and installing the vibration isolator, reaming bolt holes according to requirements, installing a reaming bolt and a common bolt, and screwing a nut by using a spanner to finish the installation and fixation of the main reduction gear device and the main machine.
9. The method for positioning and installing the main engine according to claim 1, wherein in step S101, the time for placing the main engine and the main reduction gear device on the vibration isolators respectively for prepressing is 72 hours.
10. The method for positioning and installing the main engine according to claim 1, wherein the main engine, the main reduction gear device, the sound insulation coupling, the main thrust bearing and the intermediate shaft are sequentially arranged in the fore-aft direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210229761.9A CN114701619B (en) | 2022-03-10 | 2022-03-10 | Main machine positioning and installing method based on total section construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210229761.9A CN114701619B (en) | 2022-03-10 | 2022-03-10 | Main machine positioning and installing method based on total section construction |
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| CN114701619A true CN114701619A (en) | 2022-07-05 |
| CN114701619B CN114701619B (en) | 2023-06-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115246467A (en) * | 2022-08-03 | 2022-10-28 | 中船黄埔文冲船舶有限公司 | Main engine installation method of stern semi-ship |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115246467A (en) * | 2022-08-03 | 2022-10-28 | 中船黄埔文冲船舶有限公司 | Main engine installation method of stern semi-ship |
| CN115246467B (en) * | 2022-08-03 | 2024-03-26 | 中船黄埔文冲船舶有限公司 | Main engine installation method of stern half ship |
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| Publication number | Publication date |
|---|---|
| CN114701619B (en) | 2023-06-16 |
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