CN109263793B - Installation process of jet pump of ship - Google Patents
Installation process of jet pump of ship Download PDFInfo
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- CN109263793B CN109263793B CN201810938312.5A CN201810938312A CN109263793B CN 109263793 B CN109263793 B CN 109263793B CN 201810938312 A CN201810938312 A CN 201810938312A CN 109263793 B CN109263793 B CN 109263793B
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- shaft
- flange
- shafting
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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
- B63B71/00—Designing vessels; Predicting their performance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
Abstract
The invention discloses a mounting process of a spray pump of a ship, and aims to provide a mounting process of a spray pump of a ship, which has high mounting precision and good reliability and well meets the technical requirements of ship inspection standards and turbine shafting mounting. The invention comprises the following steps: a. positioning a shaft system central line; b. positioning a jet pump shaft system; c. and (4) installing a jet pump shaft system. The invention is applied to the technical field of installation processes of the spray pumps of ships.
Description
Technical Field
The invention relates to a spray pump mounting process, in particular to a ship spray pump mounting process.
Background
The jet pump is also called a water jet propeller, and refers to a propeller in which the jet part of a propulsion mechanism is immersed in water and the reaction force generated by the jet water flow is used to drive a ship to advance. The water jet propeller is composed of a water pump, a pipeline, a suction port, a nozzle and the like, can change the jet direction of water flow through the nozzle to realize the operation of a ship, has lower efficiency than a propeller, but has good operation performance, and particularly has good adaptability to a shallow water channel with a sediment bottom. The existing spray pump for the ship is low in installation precision and poor in reliability, and the technological requirements of ship inspection standards and turbine shafting installation are difficult to meet.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides the installation process of the ship spray pump, which has high installation precision and good reliability and well meets the process requirements of ship inspection specifications and turbine shafting installation.
The technical scheme adopted by the invention is as follows: the installation process of the spray pump of the ship comprises the following steps:
a. positioning a shaft system center line: firstly, determining a shafting central line positioning datum point, then, performing shafting steel wire drawing, and determining the installation position of a jet pump hull connector on a tail seal plate, the positions of a flow channel and a flange, the positions of a stern shaft tube and a front seal, and the position of a middle bearing;
b. positioning a jet pump shaft system:
(1) marking out a processing range and an inspection line of a spray pump hull connector on a stern sealing plate by taking a steel wire as a reference, and then installing a boring bar on a hull shafting central line;
(2) a hole boring machine is used for processing the stern sealing plate to meet the requirements of flatness and verticality;
(3) repairing the surface of a stern seal plate, and installing a hull connecting piece on the stern seal plate;
(4) taking the flange surface of the installed ship body connecting piece as a reference, and cutting off the reserved length of the flow channel; according to the center line of a shaft system, spot-welding a flow channel flange on a flow channel, and spot-welding a tail pipe on the flow channel;
(5) and (4) removing the ship body connecting piece, and performing full-length welding treatment on the runner flange and the tail pipe. An auxiliary clamp is used for fixing before welding, and multiple detections are needed when the runner flange is welded, so that welding deformation is reduced;
(6) reinstalling the boring bar, and processing the runner flange and the tail pipe end face flange;
(7) the direct gap between the hull connecting piece and the runner flange can be prepared by adopting epoxy putty scraping;
c. installing a jet pump shaft system:
(1) mounting a hull connecting piece and a spray pump on a hull stern sealing plate, and fixing according to the equipment mounting requirement;
(2) after the ship is launched, the ship can stand in the water for more than 48 hours, and then the shafting can be centered;
(3) according to the installation requirement of equipment, a lifting point is required to be added on a shaft between a shaft seal device and a coupler during underwater centering, and a spraying pump shaft is lifted by using a sling with a load sensor and an adjusting bolt;
(4) after the sling is arranged on the sensor, the sensor is required to be reset to zero so as to remove the weight of the sling;
(5) mounting the sling to a designated lifting location;
(6) slowly lifting the shaft, ensuring that the lifting force is vertically applied on the shaft center line;
(7) using a feeler gauge to check whether the shaft is placed on a temporary supporting point or not, and stopping lifting when a load sensor displays a specified load;
(8) shaft fixed point position allowable deviation: ± 10mm, lift force tolerance: plus or minus 1 percent;
(9) recording the actual load on the load cell in an alignment check table;
(10) the shaft is fixed in a centered, defined position, in which the position of the impeller shaft must not be changed. Note that the lift-off is not touched and ensures that it does not stretch. Making a template for the aligned axes for future alignment checking;
(11) a flange at the front end of the spray pump shaft is used as a positioning reference point of the gear box;
(12) centering a jet pump shaft flange and a gear box output flange, and determining the installation height of a gear box;
(13) and locking the intermediate shaft to complete shafting centering.
Further, in the step b, the processing requirements of the stern seal plate processing surface, the flow channel flange and the stern tube flange are as follows:
in the step a, the shafting center line positioning comprises the following steps:
(1) locating a datum point of a shaft center line:
(1.1) the central line of the shafting is respectively arranged on the longitudinal sections of the two main ship body bodies and is parallel to the ship body base line or is firstly calibrated: determining the height of a center line at an output flange of the gear box according to the axis diagram;
(1.2) the stern reference point is positioned as follows: determining the height of a center line according to an axis diagram at the # 1 rib position behind the stern seal;
(2) and (3) shafting drawing steel wires:
(2.1) positioning the shafting central line by adopting a steel wire drawing method, and determining the shafting central line by adopting a 0.6mm steel wire to penetrate through the datum points of the head and the tail. Checking installation center lines of the host and the gear box, and checking the positions of foundation bolt holes of the host, the gear box and the intermediate bearing and the thickness of the epoxy gasket;
(2.2) the parallel deviation of the actual axis and the theoretical axis of the shafting in the horizontal direction is not more than 1 mm/m; a parallel shift in the vertical direction of not more than 0.05 mm/m; the error between the longitudinal and transverse inclination of the axis and the design inclination is not more than 1/1000 mm;
(2.3) the positioning of the shafting central line is required to be carried out in the weather of no sunlight irradiation and little temperature difference change, and other operations disturbing the shafting central positioning work are stopped according to the requirements;
(2.4) determining the mounting position of a jet pump hull connector on a tail seal plate, the positions of a flow channel and a flange, the positions of a stern shaft tube and a front seal and the position of a middle bearing;
(2.5) welding the jet pump runner to the ship body.
The installation requirements of the support bearing, the spray pump coupler, the gear box flange and the host coupler are as follows:
the invention has the beneficial effects that: the invention comprises the following steps: a. positioning a shaft system central line; b. positioning a jet pump shaft system; c. and (4) installing a jet pump shaft system. The installation process of the ship spray pump has high installation precision and good reliability, and well meets the process requirements of ship inspection specifications and turbine shafting installation.
Drawings
FIG. 1 is a schematic view of a jet pump shafting installation;
FIG. 2 is a schematic view of the shafting alignment;
① shaft seal device, ② load cell, ③ adjusting bolt, ④ display, ⑤ sling, ⑥ shaft coupling, ⑦ intermediate shaft, ⑧ temporary support, ⑨ jet pump, ⑩ hull connector.
Detailed Description
Firstly, the construction conditions of the invention are as follows:
before construction, the on-site and hull construction progress is checked on site, whether the requirements of shafting and main engine installation and positioning are met or not is met, and corresponding measures are taken to eliminate the nonconforming places.
1. Constructing a ship body: the main welding work, the straightening work, of the hull structure behind the cabin front bulkhead and below the upper deck should be completed.
2. The tightness test work of the main hull area including the cabin and the bins connected to the hull inside the cabin should be finished.
3. The flexibility of the base line of the ship body is in a specified range, the base line of the ship body and the central lines of the two main ship body are marked, and unnecessary temporary supports in the areas are removed.
4. In addition to the above requirements, the construction of other hull structures can still be carried out according to the construction progress in a factory, but when the shafting is centered, the hoisting and the construction of the superstructure which influence the shafting centering should be stopped.
5. The ship body can deform due to climate temperature difference, so that the bracing wire work is performed under the condition of not large temperature change as far as possible, generally at night or in cloudy days, the temperature difference change is small, and the bracing wire bracing system centering device is suitable for shafting centering to avoid influencing the accuracy of a shafting central line due to the deformation of the ship body.
6. All construction operations that can generate severe noise and vibration should be stopped when the wire is pulled.
7. Various preparations are ready on demand.
Positioning of center line of shaft system
1. Locating a datum point of a shaft center line:
1.1, the central line of the shafting is respectively arranged on the longitudinal section of the two main ship body pieces and is parallel to the ship body base line or the first base line is determined: and determining the height of the center line at the output flange of the gear box according to the axis diagram.
1.2, the stern datum points are positioned as follows: and determining the height of the center line at the # 1 rib position behind the stern seal according to the axis diagram.
2. Shafting bracing wires:
2.1, the central line of the shafting is positioned by adopting a method of drawing a steel wire, and the central line of the shafting is determined by adopting a 0.6mm steel wire to pass through the datum point of the fore and the aft. And (4) checking the installation center lines of the host and the gear box, and simultaneously checking the positions of foundation bolt holes of the host, the gear box and the intermediate bearing and the thickness of the epoxy gasket.
2.2, the parallel offset of the actual axis and the theoretical axis of the shafting in the horizontal direction is not more than 1 mm/m; a parallel shift in the vertical direction of not more than 0.05 mm/m; and the error between the longitudinal and transverse inclination of the axis and the design inclination is not more than 1/1000 mm.
2.3, the positioning of the central line of the shafting is required to be carried out in the weather of no sunlight irradiation and little temperature difference change, and other operations disturbing the positioning work of the central line of the shafting are stopped according to requirements.
And 2.4, determining the mounting position of the spray pump hull connector on the tail seal plate, the positions of the flow channel and the flange, the positions of the stern shaft tube and the front seal, and the position of the middle bearing.
And 2.5, welding the jet pump flow channel to the ship body.
2.6, allowable installation deviation of each component, checking a reference value:
thirdly, calculating the deflection of the shafting drawn steel wire:
according to the steel wire specification and the hanging weight of the steel wire stay wire, the deflection is calculated according to the following formula:
y-deflection correction value (mm)
g-Steel wire unit weight (g/m)
l-distance between datum points of wire (m) (distance m between two sections of wire-pulling frame)
G-Steel wire tension force (Kg)
x-is the distance (unit m) from the stay wire fixed point to the deflection point
1. The datum point of the shafting stay wire should meet the technical requirements, and after being approved by CCS, shipowner and quality inspection, the stay wire is carried out according to the datum point.
2. The wire pulling work needs to be operated in advance to ensure the measurement correctness and finally submit the acceptance and lay a good foundation.
3. After the wire drawing is finished, each measurement data needs to be stored for later use.
Fourthly, installing a jet pump shaft system:
1. mounting a hull connecting piece and a spray pump on a hull stern sealing plate, and fixing according to the equipment mounting requirement;
2. after the ship is launched, the ship can stand in the water for more than 48 hours, and then the shafting can be centered;
3. according to the installation requirement of equipment, a lifting point is required to be added on a shaft between a shaft seal device and a coupler during underwater centering, and a spraying pump shaft is lifted by using a sling with a load sensor and an adjusting bolt;
4. after the sling is arranged on the sensor, the sensor is required to be reset to zero so as to remove the weight of the sling;
5. mounting the sling to a designated lifting location;
6. slowly lifting the shaft, ensuring that the lifting force is vertically applied on the shaft center line;
7. using a feeler gauge to check whether the shaft is placed on a temporary supporting point or not, and stopping lifting when a load sensor displays a specified load;
8. shaft fixed point position allowable deviation: ± 10mm, lift force tolerance: plus or minus 1 percent;
9. recording the actual load on the load cell in an alignment check table;
10. the shaft is fixed in a centered, defined position, in which the position of the impeller shaft must not be changed. Note that the lift-off is not touched and ensures that it does not stretch. Making a template for the aligned axes for future alignment checking;
11. a flange at the front end of the spray pump shaft is used as a positioning reference point of the gear box;
12. centering a jet pump shaft flange and a gear box output flange, and determining the installation height of a gear box;
and 13, locking the intermediate shaft to finish shafting centering.
The invention is applied to the technical field of installation processes of the spray pumps of ships.
While the embodiments of the present invention have been described in terms of practical embodiments, they are not to be construed as limiting the meaning of the present invention, and modifications of the embodiments and combinations with other embodiments will be apparent to those skilled in the art in light of the present description.
Claims (4)
1. The mounting process of the jet pump of the ship is characterized by comprising the following steps: the installation process of the spray pump of the ship comprises the following steps:
a. positioning a shaft system center line: firstly, determining a shafting central line positioning datum point, then, performing shafting steel wire drawing, and determining the installation position of a jet pump hull connector on a tail seal plate, the positions of a flow channel and a flange, the positions of a stern shaft tube and a front seal, and the position of a middle bearing;
b. positioning a jet pump shaft system:
(1) marking out a processing range and an inspection line of a spray pump hull connector on a stern sealing plate by taking a steel wire as a reference, and then installing a boring bar on a hull shafting central line;
(2) a hole boring machine is used for processing the stern sealing plate to meet the requirements of flatness and verticality;
(3) repairing the surface of a stern seal plate, and installing a hull connecting piece on the stern seal plate;
(4) taking the flange surface of the installed ship body connecting piece as a reference, and cutting off the reserved length of the flow channel; according to the center line of a shaft system, spot-welding a flow channel flange on a flow channel, and spot-welding a tail pipe on the flow channel;
(5) removing a ship body connecting piece, carrying out full-welding treatment on the runner flange and the tail pipe, fixing the runner flange and the tail pipe by using an auxiliary clamp before welding, and carrying out multiple detection when welding the runner flange so as to reduce welding deformation;
(6) reinstalling the boring bar, and processing the runner flange and the tail pipe end face flange;
(7) the direct gap between the hull connecting piece and the runner flange can be prepared by adopting epoxy putty scraping;
c. installing a jet pump shaft system:
(1) mounting a hull connecting piece and a spray pump on a hull stern sealing plate, and fixing according to the equipment mounting requirement;
(2) after the ship is launched, standing in the water for more than 48 hours to perform centering treatment on the shafting;
(3) according to the installation requirement of equipment, a lifting point is required to be added on a shaft between a shaft seal device and a coupler during underwater centering, and a spraying pump shaft is lifted by using a sling with a load sensor and an adjusting bolt;
(4) after the sling is arranged on the sensor, the sensor is required to be reset to zero so as to remove the weight of the sling;
(5) mounting the sling to a designated lifting location;
(6) slowly lifting the shaft, ensuring that the lifting force is vertically applied on the shaft center line;
(7) using a feeler gauge to check whether the shaft is placed on a temporary supporting point or not, and stopping lifting when a load sensor displays a specified load;
shaft fixed point position allowable deviation: ± 10mm, lift force tolerance: plus or minus 1 percent;
recording the actual load on the load cell in an alignment check table;
fixing the shaft in a centered, defined position, where the impeller shaft must not be repositioned, taking care not to touch the lifting device and ensuring that it does not stretch, making a template for the aligned shafts for future alignment checks;
a flange at the front end of the spray pump shaft is used as a positioning reference point of the gear box;
centering a jet pump shaft flange and a gear box output flange, and determining the installation height of a gear box;
and locking the intermediate shaft to complete shafting centering.
2. The installation process of the spray pump of the ship according to claim 1, wherein: in the step b, the processing requirements of the stern sealing plate processing surface, the flow channel flange and the stern tube flange are as follows:
3. the installation process of the spray pump of the ship according to claim 1, wherein: in the step a, the shafting center line positioning comprises the following steps:
(1) locating a datum point of a shaft center line:
(1.1) the central line of the shafting is respectively arranged on the longitudinal sections of the two main ship body bodies and is parallel to the ship body base line or is firstly calibrated: determining the height of a center line at an output flange of the gear box according to the axis diagram;
(1.2) the stern reference point is positioned as follows: determining the height of a center line according to an axis diagram at the # 1 rib position behind the stern seal;
(2) and (3) shafting drawing steel wires:
(2.1) positioning the shafting central line by adopting a steel wire drawing method, determining the shafting central line by adopting a 0.6mm steel wire through the head and tail datum points, checking the installation central lines of the main machine and the gear box, and simultaneously checking the positions of the main machine, the gear box and the middle bearing anchor bolt holes and the thickness of the epoxy gasket;
(2.2) the parallel deviation of the actual axis and the theoretical axis of the shafting in the horizontal direction is not more than 1 mm/m; a parallel shift in the vertical direction of not more than 0.05 mm/m; the error between the longitudinal and transverse inclination of the axis and the design inclination is not more than 1/1000 mm;
(2.3) the positioning of the shafting central line is required to be carried out in the weather of no sunlight irradiation and little temperature difference change, and other operations disturbing the shafting central positioning work are stopped according to the requirements;
(2.4) determining the mounting position of a jet pump hull connector on a tail seal plate, the positions of a flow channel and a flange, the positions of a stern shaft tube and a front seal and the position of a middle bearing;
(2.5) welding the jet pump runner to the ship body.
4. The installation process of the spray pump of the ship according to claim 3, wherein: the installation requirements of the intermediate bearing, the spray pump coupler, the gear box flange and the host coupler are as follows:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810938312.5A CN109263793B (en) | 2018-08-17 | 2018-08-17 | Installation process of jet pump of ship |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810938312.5A CN109263793B (en) | 2018-08-17 | 2018-08-17 | Installation process of jet pump of ship |
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| CN109263793A CN109263793A (en) | 2019-01-25 |
| CN109263793B true CN109263793B (en) | 2020-07-14 |
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| CN201810938312.5A Active CN109263793B (en) | 2018-08-17 | 2018-08-17 | Installation process of jet pump of ship |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110561107B (en) * | 2019-08-30 | 2021-03-19 | 上海振华重工启东海洋工程股份有限公司 | Underwater pump and mounting process of driving system thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5568499A (en) * | 1978-11-20 | 1980-05-23 | Mitsubishi Heavy Ind Ltd | Apparatus for experiment of water jet propulsion apparatus |
| CN101774420A (en) * | 2010-04-01 | 2010-07-14 | 武昌船舶重工有限责任公司 | Mounting method of ship long axis system |
| CN101913409A (en) * | 2010-08-06 | 2010-12-15 | 上海江南长兴造船有限责任公司 | Method for improving shaft system centering process for ship building |
| JP2012148769A (en) * | 2012-03-12 | 2012-08-09 | Mitsui Eng & Shipbuild Co Ltd | Method for mounting water jet propulsion device on hull |
| CN104129489A (en) * | 2014-07-21 | 2014-11-05 | 武汉船用机械有限责任公司 | Integrated waterjet propulsion device and manufacturing and assembling method thereof |
| CN108067851A (en) * | 2017-10-20 | 2018-05-25 | 武汉船用机械有限责任公司 | A kind of assembling device of hydraulic jet propulsion system |
| CN108100156A (en) * | 2017-11-10 | 2018-06-01 | 武汉船用机械有限责任公司 | A kind of shafting alignment frock |
-
2018
- 2018-08-17 CN CN201810938312.5A patent/CN109263793B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5568499A (en) * | 1978-11-20 | 1980-05-23 | Mitsubishi Heavy Ind Ltd | Apparatus for experiment of water jet propulsion apparatus |
| CN101774420A (en) * | 2010-04-01 | 2010-07-14 | 武昌船舶重工有限责任公司 | Mounting method of ship long axis system |
| CN101913409A (en) * | 2010-08-06 | 2010-12-15 | 上海江南长兴造船有限责任公司 | Method for improving shaft system centering process for ship building |
| JP2012148769A (en) * | 2012-03-12 | 2012-08-09 | Mitsui Eng & Shipbuild Co Ltd | Method for mounting water jet propulsion device on hull |
| CN104129489A (en) * | 2014-07-21 | 2014-11-05 | 武汉船用机械有限责任公司 | Integrated waterjet propulsion device and manufacturing and assembling method thereof |
| CN108067851A (en) * | 2017-10-20 | 2018-05-25 | 武汉船用机械有限责任公司 | A kind of assembling device of hydraulic jet propulsion system |
| CN108100156A (en) * | 2017-11-10 | 2018-06-01 | 武汉船用机械有限责任公司 | A kind of shafting alignment frock |
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