Ship stern tube structure

Abstract

The utility model discloses a ship stern tube structure which comprises a water-lubricated bearing and a stern post, the water-lubricated bearing is of an integrated three-section structure, a stern post bearing front section, a stern post bearing middle section and a stern post bearing rear section are sequentially arranged from the rear end of the water-lubricated bearing to the front end of the water-lubricated bearing, and the axial lengths of the stern post bearing front section, the stern post bearing middle section and the stern post bearing rear section are the same. The diameters of the tail column bearing front section, the tail column bearing middle section and the tail column bearing rear section are sequentially and equivalently decreased, and every two adjacent sections are in transition connection through a bearing inclined surface; the structure of the tail column is matched with that of the water-lubricated bearing; the water lubricated bearing extends into the tail column, the two bearing inclined faces are located in the axial range of the tail column front section and the axial range of the tail column middle section respectively, and the two tail column inclined faces are located in the axial range of the tail column bearing middle section and the axial range of the tail column bearing rear section respectively. According to the ship stern tube structure, the hard contact insertion amount of the bearing and the stern column can be reduced, and the damage caused by press fitting of the bearing is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to shipbuilding technical field, especially relate to a ship stern tube structure. BACKGROUND

[0002] Although the traditional oil lubrication stern column metal bearing is provided with end sealing, gaseous cavity and other measures, it is still inevitable to cause wear after long time use, and the end sealing ring needs to be replaced every 5 years, and even the sealing shell needs to be replaced. On the one hand, it increases the use and maintenance cost of the ship; on the other hand, even slight sealing leakage will cause irreversible damage to the ocean and river environment and organisms; at the same time, the metal bearing relies on the cooling of the lubricating oil in the stern column, and the lubricating oil needs to be cooled again by an external cooler, so the system is relatively complex.

[0003] The oil lubrication bearing is usually shrink fitted with the stern column during installation, and needs to be forcibly pushed into the bearing in the stern column by using a hydraulic pump with appropriate force, and the interference amount must be controlled between 0.02mm ~0.04mm, otherwise the bearing cannot be pressed in, and then the surface of the bearing is damaged.

[0004] The water lubrication bearing directly cools by using seawater or river water, has good cooling effect, is made of GRP reinforced plastic, is firmly fixed in the stern column by the expansion of the material after long time water contact and the positioning bolts of the end flange, does not need to be equipped with stern column sealing, has no environmental pollution risk, and does not need to be regularly docked for maintenance.

[0005] At present, the production and manufacturing of the water lubrication bearing are basically monopolized by foreign manufacturers, but the material is extremely easy to be deformed by environmental temperature before installation; the length of the bearing is relatively long, and even if the clearance fit is used, it is also easy to be blocked during pressing in of the bearing, and cannot be inserted with force; if forcibly disassembled later, the surface of the bearing will be damaged, and then the bearing is scrapped. Once the installation problem occurs in the shipyard, the bearing is damaged, the foreign manufacturers charge high prices on one hand, and the supply cycle is long on the other hand, and the bearing generally has installation conditions before launching, so that the launching progress of the ship is seriously affected, and the whole construction plan is delayed. CONTENT OF THE UTILITY MODEL

[0006] In view of the above problems, the utility model provides a ship stern tube structure.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] The application discloses a ship stern tube structure, which comprises a water-lubricated bearing and a stern column, wherein the water-lubricated bearing is a three-section integrated structure, and the stern column is also a three-section integrated structure.

[0009] Further, the diameter difference between the stern column front section and the stern column middle section, and between the stern column middle section and the stern column rear section is 1 cm, and the diameter difference between the stern column bearing front section and the stern column bearing middle section, and between the stern column bearing middle section and the stern column bearing rear section is 1 cm.

[0010] Further, the stern column bearing front section and the stern column front section are in clearance fit, and the clearance is 0-0.06 mm.

[0011] Further, the vertical distance between the two ends of the bearing inclined surface along the stern column axial direction is 10 mm, and the vertical distance between the two ends of the stern column inclined surface along the stern column axial direction is 5 mm.

[0012] Further, the water-lubricated bearing comprises a bearing body and a bearing flange which is integrally formed at the rear end of the bearing body, and the bearing flange and the bearing body are connected through a round corner, and the R of the round corner is less than 5 mm.

[0013] Further, the front end of the bearing body is provided with a chamfer which is reduced in diameter from the rear end of the bearing body to the front section of the bearing body, the chamfer is less than 45 degrees, and the length of the chamfer along the axial direction of the bearing body is 5 mm.

[0014] Further, one end of the inner hole of the stern column close to the bearing flange is provided with a 45-degree chamfer.

[0015] The ship stern tube structure of the utility model, aiming at the material characteristics of water-lubricated bearing and the scene of processing, installation and use, adopts the method of grading processing, reduces the hard contact insertion amount of bearing and stern column, reduces the damage of bearing during pressing, and simultaneously adopts simple tooling, ensures the insertion of stern column of bearing in center, and the end face is uniformly stressed in 360 degrees during insertion.

[0016] The traditional bearing is installed in a whole stern tube structure rolled by a steel plate, the bearing is pressed in the whole stern tube, and the bearing and the whole stern tube adopt interference fit; then the whole stern tube is inserted into the tail structure (stern column) as a whole, is hollow, and at least 20mm gap is reserved on the outer single side of the stern tube. The gap is filled with epoxy resin to ensure that the whole stern tube can be firmly fixed in the stern column. The technical scheme of the utility model reduces the manufacturing cost of the whole stern tube and reduces the epoxy filling construction cost between the whole stern tube and the gap of the stern column. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the installation schematic view of the ship stern tube.

[0018] Figure 2 is Figure 1 is the enlarged schematic view of part B.

[0019] Figure 3 is Figure 1 is the enlarged schematic view of part C.

[0020] Figure 4 is the structural schematic view of the water-lubricated bearing.

[0021] Figure 5 is Figure 4 is the enlarged schematic view of part E.

[0022] Figure 6 is Figure 4 is the enlarged schematic view of part F.

[0023] Figure 7 is Figure 4 is the enlarged schematic view of part H1.

[0024] Figure 8 is Figure 4 is the enlarged schematic view of part H2.

[0025] Figure 9 is the structural schematic view of the water-lubricated bearing.

[0026] Figure 10 is Figure 9 is the enlarged schematic view of part A.

[0027] Figure 11 is Figure 9Enlarged view of the middle D section.

[0028] Wherein, 1-water lubrication bearing, 2-stern post, 3-end blind flange, 4-screw, 5-jack, 6-angle steel, 7-chain, 8-hoist, 9-nut, 101-stern post bearing front section, 102-stern post bearing middle section, 103-stern post bearing rear section, 104-bearing inclined surface, 105-bearing flange, 201-stern post front section, 202-stern post middle section, 203-stern post rear section, 204-stern post inclined surface. DETAILED DESCRIPTION

[0029] The utility model will be further explained in connection with the drawings and specific embodiments.

[0030] As Figures 1-11 shown, a ship stern tube structure, including water lubrication bearing 1 and stern post 2, the water lubrication bearing 1 is integrated three section structure, from water lubrication bearing 1 rear end to front end in turn is stern post bearing front section 101, stern post bearing middle section 102 and stern post bearing rear section 103, the axial length of stern post bearing front section 101, the stern post bearing middle section 102 and the stern post bearing rear section 103 is same, the diameter of stern post bearing front section 101, the stern post bearing middle section 102 and the stern post bearing rear section 103 is sequentially equal amount decreasing, and the transition connection of adjacent two sections is through bearing inclined surface 104;The stern post 2 is integrated three section structure, from water lubrication bearing 1 rear end to front section in turn is stern post front section 201, stern post middle section 202 and stern post rear section 203, the axial length of stern post front section 201, stern post middle section 202 and stern post rear section 203 is same, the diameter of stern post front section 201, stern post middle section and stern post rear section 203 is sequentially equal amount decreasing, and the transition connection of adjacent two sections is through stern post inclined surface 204;The water lubrication bearing 1 extends into the stern post, two bearing inclined surfaces 104 are located in the axial range of stern post front section 201 and stern post middle section respectively, two stern post inclined surfaces 204 are located in the axial range of stern post bearing middle section 102 and the stern post bearing rear section 103 respectively.

[0031] In the embodiment, the diameter difference of stern post front section 201 and stern post middle section 202, stern post middle section 202 and stern post rear section 203 is 1cm, the diameter difference of stern post bearing front section 101 and stern post bearing middle section 102, stern post bearing middle section 102 and stern post bearing rear section 103 is 1cm;The clearance fit of stern post bearing front section 101 and stern post front section 201, and the clearance amount is 0~0.06mm.

[0032] The vertical distance of bearing inclined surface 104 between the two ends along the axial direction of stern post 2 is 10mm, and the vertical distance of stern post inclined surface 204 between the two ends along the axial direction of stern post is 5mm.

[0033] The water-lubricated bearing 1 comprises a bearing body and a bearing flange 105 integrally formed with the rear end of the bearing body, and the bearing flange 105 and the bearing body are connected through a round corner transition, and the R of the round corner is less than 5 mm. The front end of the bearing body is provided with a chamfer with a diameter decreasing from the rear end of the bearing body to the front section of the bearing body, and the chamfer is less than 45 degrees, and the length of the chamfer along the axial direction of the bearing body is 5 mm. The inner hole of the stern column is provided with a 45° chamfer at one end close to the bearing flange 105.

[0034] The processing method of the ship stern tube structure specifically comprises the following steps:

[0035] S1. Draw the water-lubricated bearing 1 processing drawing;

[0036] S2. Draw the stern column processing drawing according to the water-lubricated bearing 1 processing drawing;

[0037] S3. Simulate the insertion of the water-lubricated bearing 1 into the stern column 2 by using software, and according to the insertion result, appropriately adjust the lengths of the stern column bearing front section 101, the stern column bearing middle section 102, the stern column bearing rear section 103, the stern column front section 201, the stern column middle section 202 and the stern column rear section 203, so as to ensure that the stern column bearing front section 101, the stern column bearing middle section 102 and the stern column bearing rear section 103 can simultaneously contact the stern column front section 201, the stern column middle section 202 and the stern column rear section 203 respectively during insertion;

[0038] S4. Process the stern column 2, first process the inner hole of the stern column 2 by using a boring bar according to the stern column 2 processing drawing, and the surface roughness of the bored hole should meet 0.0032, and the roundness and cylindricity should meet less than or equal to 0.03 mm; after boring, measure the inner hole data and record them, and then process the bearing outer circle matching surface according to the recorded data;

[0039] S5. Drilling and threading are performed on the end surface of the stern column 2 and the bearing flange 105;

[0040] S6. Process the water-lubricated bearing 1 according to the water-lubricated bearing 1 processing drawing.

[0041] The installation method of the ship stern tube structure specifically comprises the following steps:

[0042] SA. Apply grease to the surface of the water-lubricated bearing;

[0043] SB. Insert the water-lubricated bearing into the stern column 2 until the stern column bearing rear section 103 contacts the stern column rear section 203, at this time, the stern column bearing front section 101 and the stern column bearing middle section 102 contact the stern column front section 201 and the stern column middle section 202 respectively;

[0044] SC. The water-lubricated bearing 1 is connected to a water-lubricated bearing installation tool, and the water-lubricated bearing is completely pushed into the stern post 2 by using the water-lubricated bearing installation tool.

[0045] In the embodiment, the water-lubricated bearing installation tool comprises an end blind flange 3 arranged on the outer side of the bearing flange 105, two screw rods 4, a jack 5 and an angle steel 6. The angle steel 6 is arranged on the side of the end blind flange 3 away from the water-lubricated bearing 1. The screw rods 4 are symmetrically arranged on the upper and lower sides. One end of the screw rod 4 is connected to the end face of the stern post 2 in sequence after passing through the angle steel 6, the end blind flange 3 and the bearing flange 105. The other end of the screw rod 4 is connected to the angle steel 6 through a nut 9. The jack 5 is arranged between the angle steel 6 and the end blind flange 3. The base of the jack 5 is temporarily fixed on the blind flange through a screw. The angle steel 6, the jack 5 and the end blind flange 3 are coaxially arranged with the water-lubricated bearing 1. The upper end of the end blind flange 3 is provided with a lifting ring screw. The lifting ring screw is connected to a hoist 8 through a chain 7.

[0046] In use, the handle of the jack 5 is shaken, the bearing is moved towards the stern post 2, and the tightness of the chain is adjusted at the same time until the flange of the bearing is completely in contact with the end face of the stern post 2.

[0047] It should be understood by those skilled in the art that the above description is only a specific embodiment of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A boat stern tube structure, characterized in that, The application relates to a water-lubricated bearing and a stern post, wherein the water-lubricated bearing is a three-section integral structure, and the stern post is also a three-section integral structure; the water-lubricated bearing comprises a stern post bearing front section, a stern post bearing middle section and a stern post bearing rear section from the rear end to the front end of the water-lubricated bearing; the stern post bearing front section, the stern post bearing middle section and the stern post bearing rear section have the same axial length; the diameters of the stern post bearing front section, the stern post bearing middle section and the stern post bearing rear section are equal and gradually reduced in turn; and two adjacent sections are connected through a bearing inclined surface; the stern post comprises a stern post front section, a stern post middle section and a stern post rear section from the rear end to the front end of the water-lubricated bearing; the stern post front section, the stern post middle section and the stern post rear section have the same axial length; the diameters of the stern post front section, the stern post middle section and the stern post rear section are equal and gradually reduced in turn; and two adjacent sections are connected through a stern post inclined surface; the water-lubricated bearing extends into the stern post; two bearing inclined surfaces are located in the axial range of the stern post front section and the stern post middle section; and two stern post inclined surfaces are located in the axial range of the stern post bearing middle section and the stern post bearing rear section.

2. The boat stern tube structure according to claim 1, characterized in that The diameter difference between the stern post front section and the stern post middle section, and between the stern post middle section and the stern post rear section is 1cm; and the diameter difference between the stern post bearing front section and the stern post bearing middle section, and between the stern post bearing middle section and the stern post bearing rear section is 1cm.

3. The boat stern tube structure according to claim 2, characterized in that The stern post bearing front section and the stern post front section are in clearance fit, and the clearance is 0-0.06mm.

4. The boat stern tube structure according to claim 3, characterized in that The vertical distance between the two ends of the bearing inclined surface along the stern post axial direction is 10mm, and the vertical distance between the two ends of the stern post inclined surface along the stern post axial direction is 5mm.

5. The boat stern tube structure according to claim 4, characterized in that The water-lubricated bearing comprises a bearing body and a bearing flange which is integrally formed at the rear end of the bearing body; the bearing flange and the bearing body are connected through a round corner transition, and the R of the round corner is less than 5mm.

6. The boat stern tube structure according to claim 5, characterized in that The front end of the bearing body is provided with a chamfer which is reduced in diameter from the rear end of the bearing body to the front section of the bearing body, the chamfer is less than 45 degrees, and the length of the chamfer along the axial direction of the bearing body is 5mm.

7. The boat stern tube structure according to claim 6, characterized in that One end of the inner hole of the stern post which is close to the bearing flange is provided with a 45-degree chamfer.

Images