CN100423886C - Cold packing method for stern tube bearing of large ship and refrigeration equipment therefor - Google Patents
Cold packing method for stern tube bearing of large ship and refrigeration equipment therefor Download PDFInfo
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- CN100423886C CN100423886C CNB2006100468479A CN200610046847A CN100423886C CN 100423886 C CN100423886 C CN 100423886C CN B2006100468479 A CNB2006100468479 A CN B2006100468479A CN 200610046847 A CN200610046847 A CN 200610046847A CN 100423886 C CN100423886 C CN 100423886C
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- stern tube
- cylindrical shell
- tube bearing
- bearing
- end cap
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Abstract
The present invention relates to a cold packing method and a refrigerating device for stern tube bearings of large ships. The refrigerating device comprises a cylinder body which is made from materials with large intensity and small heat transfer coefficient, both ends of the cylinder body are provided with end covers which can be smartly assembled and disassembled with the cylinder body; a liquid nitrogen spraying pipe is arranged in the cylinder body; a guiding rail is laid in the inner wall under the cylinder body; a bracket is arranged outside the cylinder body and is provided with a guiding rail with is butted with the guiding rail in the cylinder body, and a cart with wheels is installed on the guiding rails. A stern tube bearing to be packed in a cold way is arranged on the cart, is put in the cylinder body through the cart and is refrigerated by the spraying pipe spraying liquid nitrogen; when spraying is finished, the end covers are opened for measuring the size of the outer diameter of the stern tube bearing; when the size of the outer diameter of the stern tube bearing reaches the requirements of contraction size, the stern tube bearing is pulled to be packed in a stern tube in a cold way, and cold assembly of stern tube bearings and stern tubes is finished. The present invention has the advantages of high assembly efficiency, material saving and reduced cost.
Description
(1) technical field
The present invention relates to the shipbuilding field, particularly relate to large ship stern tube bearing cold fitting method and refrigerating plant.
(2) background technology
Stern tube bearing and stern tube shaft pipe are interference fit, and assembly method in the past is that actual measurement stern tube shaft hole internal diameter size and the stern tube bearing magnitude of interference that be pressed into of stern tube bearing after according to stern tube shaft pipe bore hole on the ship requires to process the stern tube bearing outside dimension.Traditionally, stern tube bearing adopts the method for dry hydraulic installation to press-fit.This method is adopted by domestic most of shipyard, and the installation quality that press-fits stern tube bearing by conventional method will be subjected to all multifactor influences such as environment temperature, installation personnel technical merit, stern tube shaft pipe orifice form and position tolerance, stern tube shaft pipe orifice surface roughness, stern tube bearing.The method wastes time and energy, usually the stern tube bearing surface abrasion can occur, and the magnitude of interference reduces; Or the bearing disalignment appears, sometimes even matching surface between stern tube bearing and stern tube shaft pipe occurs and draw and burn or kill, make stern tube bearing problem such as scrap.
(3) summary of the invention
The technical problem to be solved in the present invention provides a kind of standard assembling, need not reprocess and pull fitting surface, can improve efficiency of assembling, saves material, the large ship bearing cold fitting method and the refrigerating plant that reduce cost simultaneously again.
The technical scheme that adopts is:
Large ship stern tube bearing refrigerating plant comprises cylindrical shell, shower, dolly, guide rail, support, end cap.The glass-reinforced plastic material that cylindrical shell is big with intensity, heat transfer coefficient is very little is made, and outer surface is taked adiabatic measure.The cylindrical shell two ends are provided with end cap, end cap is connected with cylindrical shell by gim peg on gim peg under the end cap and the end cap, be provided with shower in the cylindrical shell, the shower top connects filled mouthful, be evenly equipped with spray apertures on the shower, filling mouth fixedlys connected with the cylindrical shell above and below respectively with tap hole, guide rail is two parts, be laid on the inwall of cylindrical shell below and on the support, dolly is contained on the guide rail by self wheel, and cylindrical shell below inwall is provided with collecting tank, collecting tank is connected with tap hole, prop up and be erected at the cylindrical shell outside, transitional cylindrical shell and the stern tube shaft pipe of connecting constitutes stern tube bearing cold charge refrigerating plant.
Large ship stern tube bearing cold fitting method comprises the steps:
1, before the cold charge, measures stern tube bearing hull-skin temperature and stern tube bearing outside dimension, and note down;
2, cylindrical shell one side end cap is removed;
3, mounting bracket between cylindrical shell and stern tube shaft pipe, the guide rail separated into two parts, the part cylindrical shell of packing into, another part is contained on the support, the guide rail alignment;
4, on guide rail, place the dolly of belt wheel;
5, stern tube bearing is placed on the dolly, the big end of stern tube bearing is aimed at the cylindrical shell of cooling device, and small end is aimed at the stern tube shaft pipe;
6, stern tube bearing is pushed in the cylindrical shell by dolly, remove support, fixedly upper end cover;
7, filled mouthful on the cylindrical shell connects liquid nitrogen, and liquid nitrogen is through being evenly equipped with the shower spray cooling stern tube bearing of spray apertures;
8,, treat that the stern tube bearing surface temperature reduces to the design temperature cooling and finish with thermocouple measurement stern tube bearing surface temperature;
9, open end cap, measure cooling back stern tube bearing external diameter, its outside dimension meets the requirements of amount of contraction, removes end cap, connects support again between cylindrical shell and stern tube shaft pipe;
10, dolly and stern tube bearing are pulled out cylindrical shell, adjust stern tube bearing centering stern tube shaft pipe, promote the stern tube bearing cold charge and go into the stern tube shaft pipe.
Above-mentioned steps 7 liquid nitrogen sprayings cooling stern tube bearing, its liquid nitrogen pressure is 0.2-0.4Mpa; Spray time: calculate the spray amount of liquid nitrogen according to the shrinkage amount, utilize and set spray rate, and then calculate spray time.
The shrinkage temperature difference and the cold charge front surface temperature sum of above-mentioned steps 8 described design temperatures for calculating according to the shrinkage amount, the temperature that finally obtains.
Advantage of the present invention: can effectively avoid the existing matching surface of conventional dry pressing method to draw the problem of burning or killing, shortened installation time, simplified assembling back secondary operations program, standard level is assembled into one time to become multistage repairing, make the fittings supply standardization, improve efficiency of assembling greatly, saved material again simultaneously, reduced cost.
(4) description of drawings
Fig. 1 is a stern tube bearing refrigerating plant schematic diagram of the present invention.
Fig. 2 is the stern tube bearing of the present invention refrigerating plant schematic diagram of packing into.
(5) specific embodiment
Embodiment
Large ship stern tube bearing refrigerating plant comprises cylindrical shell 1, shower 2, dolly 3, guide rail 4, support 11, end cap 10.Cylindrical shell 1 outer surface is taked adiabatic measure, bigger with intensity, the glass-reinforced plastic material that heat transfer coefficient is very little is made, cylindrical shell 1 two ends are provided with end cap 10, end cap 10 can mount and dismount flexibly by gim peg on gim peg under the end cap 7 and the end cap 8 and cylindrical shell 1, be provided with shower 2 in the cylindrical shell 1, shower 2 tops connect filled mouthful 5, be evenly equipped with spray apertures on the shower, filling mouthfuls 5 fixedlys connected with cylindrical shell 1 above and below respectively with tap hole 6, guide rail 4 is laid on the cylindrical shell 1 below inwall, dolly 3 is contained on the guide rail 4 by self wheel, cylindrical shell 1 inwall is provided with collecting tank 9, and collecting tank 9 is connected with tap hole 6, and support 11 is located at cylindrical shell 1 outside, play transitional connection the between cylindrical shell 1 and the stern tube shaft pipe 13, the cooling device that formation stern tube bearing cold charge is used.
Large ship stern tube bearing cold fitting method comprises the following steps:
1. before the cold charge, measure stern tube bearing 12 hull-skin temperatures and stern tube bearing 12 outside dimensions, and note down;
2. cylindrical shell 1 one side end caps 10 are removed;
3. between cylindrical shell 1 and stern tube shaft pipe 13, set up support 11, guide rail 4 separated into two parts, the part cylindrical shell 1 of packing into, another part is contained on the support 11, the guide rail alignment;
4. on guide rail 4, place the dolly 3 of belt wheel;
5. stern tube bearing 12 is placed on the dolly 3, stern tube bearing 12 big ends are aimed at the cylindrical shell 1 of cooling device, and small end is aimed at stern tube shaft pipe 13;
6. stern tube bearing 12 is pushed in the cylindrical shell 1 by dolly 3, remove support 11, fixedly upper end cover 10;
7. filled mouthful 5 on the cylindrical shell 1 connects liquid nitrogen, and liquid nitrogen is through the shower 2 spray cooling stern tube bearings 12 of uniform spray apertures, and liquid nitrogen pressure is 0.3Mpa, and spray time is 25 minutes through calculating;
8. with thermocouple measurement stern tube bearing 12 surface temperatures, treat that stern tube bearing 12 surface temperatures reduce to through after calculate subzero 90 ℃, cooling finishes;
9. open end cap 10, measure cooling back stern tube bearing 12 external diameters, its outside dimension meets the requirements of the shrinkage amount, removes end cap 10, connects support 11 again between cylindrical shell 1 and stern tube shaft pipe 13;
10. dolly 3 and stern tube bearing 12 are pulled out cylindrical shell 1, adjust stern tube bearing 12 centering stern tube shaft pipes 13, promote stern tube bearing 12 cold charges and go into stern tube shaft pipe 13.
Claims (4)
1. large ship stern tube bearing refrigerating plant comprises cylindrical shell (1), shower (2), dolly (3), guide rail (4), support (11), end cap (10); The glass-reinforced plastic material that cylindrical shell (1) is big with intensity, heat transfer coefficient is very little is made, and outer surface is taked adiabatic measure; Cylindrical shell (1) two ends are provided with end cap (10), and end cap (10) is connected with cylindrical shell (1) by gim peg (8) on gim peg under the end cap (7) and the end cap; Be provided with shower (2) in the cylindrical shell (1), shower (2) top connects filled mouthful (5), is evenly equipped with spray apertures on the shower, fills mouthful (5) and fixedlys connected with cylindrical shell (1) above and below respectively with tap hole (6); Guide rail (4) is laid on the inwall of cylindrical shell (1) below and on the support (11) for two parts, and dolly (3) is contained on the guide rail (4) by self wheel; Cylindrical shell (1) below inwall is provided with collecting tank (9), and collecting tank (9) is connected with tap hole (6); Support (11) is located at cylindrical shell (1) outside, is positioned between cylindrical shell (1) and the stern tube shaft pipe (13).
2. large ship stern tube bearing cold fitting method, its feature comprises the following steps:
Before A, the cold charge, measure stern tube bearing (12) hull-skin temperature and stern tube bearing (12) outside dimension, and note down;
B, cylindrical shell (1) one side end cap (10) is removed;
C, between cylindrical shell (1) and stern tube shaft pipe (13) mounting bracket (11), guide rail (4) separated into two parts, the part cylindrical shell (1) of packing into, another part is contained on the support (11), guide rail (4) alignment;
D, go up to place belt wheel dolly (3) at guide rail (4);
E, stern tube bearing (12) is placed on the dolly (3), the big end of stern tube bearing (12) is aimed at the cylindrical shell (1) of cooling device, and small end is aimed at stern tube shaft pipe (13);
F, stern tube bearing (12) is pushed in the cylindrical shell (1) by dolly (3), remove support (11), fixedly upper end cover (10);
Filled mouthful (5) on G, the cylindrical shell (1) connect liquid nitrogen, shower (2) the spray cooling stern tube bearing (12) of liquid nitrogen through being evenly equipped with spray apertures;
H, with thermocouple measurement stern tube bearing (12) surface temperature, treat that stern tube bearing (12) surface temperature reduces to the design temperature cooling and finish;
I, open end cap (10), measure cooling back stern tube bearing (12) external diameter, its outside dimension meets the requirements of the shrinkage amount, removes end cap (10), connects support (11) again between cylindrical shell (1) and stern tube shaft pipe (13);
J, dolly (3) and stern tube bearing (12) are pulled out cylindrical shell (1), adjust stern tube bearing (12) centering stern tube shaft pipe (13), promote stern tube bearing (12) cold charge and go into stern tube shaft pipe (13).
3. large ship stern tube bearing cold fitting method according to claim 2 is characterized in that described step (G) liquid nitrogen spraying cooling stern tube bearing, and its liquid nitrogen pressure is 0.2-0.4Mpa; Spray time: calculate the spray amount of liquid nitrogen according to the shrinkage amount, utilize and set spray rate, and then calculate spray time.
4. large ship stern tube bearing cold fitting method according to claim 2, it is characterized in that described step (H) stern tube bearing (12) surface temperature reduces to design temperature, the shrinkage temperature difference and the cold charge front surface temperature sum of design temperature for calculating according to the shrinkage amount, the temperature that finally obtains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100468479A CN100423886C (en) | 2006-06-09 | 2006-06-09 | Cold packing method for stern tube bearing of large ship and refrigeration equipment therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100468479A CN100423886C (en) | 2006-06-09 | 2006-06-09 | Cold packing method for stern tube bearing of large ship and refrigeration equipment therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1864914A CN1864914A (en) | 2006-11-22 |
| CN100423886C true CN100423886C (en) | 2008-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100468479A Expired - Fee Related CN100423886C (en) | 2006-06-09 | 2006-06-09 | Cold packing method for stern tube bearing of large ship and refrigeration equipment therefor |
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| CN (1) | CN100423886C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101543952B (en) * | 2009-05-05 | 2011-07-27 | 沪东中华造船(集团)有限公司 | Device and method for mounting bearing bushing in interference fit with marine shafting |
| CN102211266A (en) * | 2011-04-02 | 2011-10-12 | 宁波钜德精工机械有限公司 | Interference fit freezing method applied to main rollers |
| CN102310307A (en) * | 2011-07-04 | 2012-01-11 | 常州天合光能有限公司 | Assembly technology of bearing box of crystalline silicon slicer |
| CN104097024B (en) * | 2014-07-11 | 2017-03-15 | 中车兰州机车有限公司 | Power transmission pin assemble method, device and leakage basket |
| CN108817915B (en) * | 2018-09-26 | 2019-09-06 | 郑州科技学院 | Clamping device is used in a kind of assembly of bearing |
| CN109707751B (en) * | 2018-11-26 | 2020-07-24 | 浙江创诺汽车零部件有限公司 | Cooling device for bearing manufacturing based on liquid nitrogen ice breaking |
| CN114918646A (en) * | 2022-04-29 | 2022-08-19 | 中船广西船舶及海洋工程有限公司 | Shrinkage mounting process for babbitt metal bearing of stern tube of large ship |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3525235A (en) * | 1968-11-25 | 1970-08-25 | Union Carbide Corp | Spray refrigeration system for freeze-sensitive product |
| JPH11138357A (en) * | 1997-11-11 | 1999-05-25 | Sumitomo Heavy Ind Ltd | Cooling system used to cooled fitting work by liquid nitrogen |
| CN1281136A (en) * | 1999-07-15 | 2001-01-24 | 气体产品与化学公司 | Method and equipment for freezing products |
-
2006
- 2006-06-09 CN CNB2006100468479A patent/CN100423886C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3525235A (en) * | 1968-11-25 | 1970-08-25 | Union Carbide Corp | Spray refrigeration system for freeze-sensitive product |
| JPH11138357A (en) * | 1997-11-11 | 1999-05-25 | Sumitomo Heavy Ind Ltd | Cooling system used to cooled fitting work by liquid nitrogen |
| CN1281136A (en) * | 1999-07-15 | 2001-01-24 | 气体产品与化学公司 | Method and equipment for freezing products |
Non-Patent Citations (4)
| Title |
|---|
| 大型船舶艉管轴承冷装工艺探讨. 于旸，汪荣顺，顾建明.造船技术，第2期. 2006 |
| 大型船舶艉管轴承冷装工艺探讨. 于旸，汪荣顺，顾建明.造船技术，第2期. 2006 * |
| 赛龙艉轴承过盈配合冷冻安装工艺. 顾正全.渔业现代化，第6期. 2000 |
| 赛龙艉轴承过盈配合冷冻安装工艺. 顾正全.渔业现代化，第6期. 2000 * |
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|---|---|
| CN1864914A (en) | 2006-11-22 |
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Granted publication date: 20081008 Termination date: 20180609 |