KR20220036137A - Stern tube assembly and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a stern tube assembly installed on a hull to surround the propeller shaft of a ship, where both ends are inserted into the propeller side casting of the hull and the engine side casting formed spaced apart from the propeller side casting, and are identical throughout the longitudinal direction. a bearing housing having an outer diameter; Flange portions installed on the stern side and bow side ends of the bearing housing, respectively; and a fixing part for fixing the bearing housing to the propeller-side casting and the engine-side casting.

Description

Stern tube assembly and its manufacturing method {STERN TUBE ASSEMBLY AND MANUFACTURING METHOD THEREOF}

The present invention relates to a stern tube assembly, and more specifically, to a stern tube assembly having a bearing unit for supporting a propeller shaft and a method of manufacturing the same.

The driving force of the engine is transmitted to the propeller through the propulsion shaft, and the ship is operated using the propulsion generated by the rotation of the propeller.

The propulsion shaft is supported by a bearing on a stern tube (stern tube) provided at the rear of the ship and is installed to penetrate the stern tube.

Generally, the stern tube is inserted and installed within a hull block constituting the stern to support the propulsion shaft, and is integrally coupled with a bush housing connected to both ends of the stern tube to form one stern tube assembly.

Conventionally, when installing a stern tube assembly on a hull block, the stern tube assembly is inserted into the hull block, the center of the stern tube assembly and the center of the engine drive shaft or propeller shaft are aligned, and then the stern tube assembly is installed at both ends of the stern tube assembly. The formed or installed flange is installed to be fixed by bolting it to the casting formed on the propeller side and the engine side of the hull, respectively.

However, the method of installing the stern tube assembly through bolt fastening requires the construction of thread taps for fastening bolts to each flange and hull block at both ends of the stern tube assembly, and fastening multiple bolts in the circumferential direction of the flange. This not only requires a lot of work time, but also causes the stern tube assembly itself to become larger in appearance and increase in weight.

In particular, the hull block must be machined with a groove for bolt fastening at a position corresponding to the bolt fastening portion of the flange, but it may be difficult to machine the groove for fastening the bolt at the exact position of the hull block.

In addition, in the prior art, the bush housing and the flange coupled to the bush housing are manufactured by forging or casting, resulting in a decrease in productivity and an increase in processing costs.

In addition, the conventional stern tube assembly integrally forms a flange portion with an expanded diameter at the stern end, and is installed by inserting the stern tube assembly in the bow direction from the stern of the hull block, in the rear area of the stern of the hull block. Space must be secured to insert the stern tube assembly, and since the outer diameters of the bush housing and the stern tube are different, a step is formed in the longitudinal direction, so there is a problem in that it is not easy to insert the stern tube assembly into the hull block.

In addition, disassembly of the stern tube assembly for maintenance, etc. involves the inconvenience of removing the rudder provided on the stern side of the propeller, so improvements are required.

Republic of Korea Patent Publication No. 10-0767787 Republic of Korea Patent Publication No. 10-0788036

The present invention is a stern tube assembly that can improve economic efficiency and convenience of installation work through cost reduction by improving the coupling structure between the stern tube assembly installed on the hull block to support the propeller shaft and the hull block, and the shape of the stern tube assembly itself. The purpose is to provide a tube assembly and its manufacturing method.

According to one aspect of the present invention, a stern tube assembly is installed on a hull to surround the propeller shaft of a ship, comprising: a bearing housing whose both ends are inserted into a propeller side casting of the hull and an engine side casting formed spaced apart from the propeller side casting; Flange portions installed on the stern side and bow side ends of the bearing housing, respectively; and a fixing part for fixing the bearing housing to the propeller-side casting and the engine-side casting, wherein the bearing housing may be provided as a stern tube assembly having the same outer diameter throughout its longitudinal direction.

The bearing housing includes a first bearing installation portion that is inserted into the propeller-side casting and has one or more stern bearings installed therein to support the propeller shaft; a second bearing installation portion that is inserted into the engine-side casting and has one or more bow bearings installed therein to support the propeller shaft; And it may include a connection part integrally formed between the first bearing installation part and the second bearing installation part.

Additionally, the first bearing installation part and the second bearing installation part may be manufactured by bending a metal plate.

In addition, the flange portion includes a first flange bolted to the stern end of the first bearing installation portion; And it may include a second flange bolted to the bow side end of the second bearing installation part.

In addition, the stern end of the first bearing installation part is located on the bow side of the propeller side casting, so that at least a portion of the first flange is inserted into the propeller side casting, and the bow side of the second bearing installation part. The end is located on the bow side rather than the bow side end of the engine-side casting, so that the second flange can be spaced apart from the bow-side end of the engine-side casting in the bow direction.

In addition, the fixing part includes: a first anti-rotation ring located on the outer peripheral surface of the first flange portion and having one side in contact with the stern end of the propeller-side casting; And one side of the outer peripheral surface of the second bearing installation portion may be positioned in contact with the bow end of the engine side casting.

In addition, the first anti-rotation ring is welded to the propeller-side casting and the first flange portion, and the second anti-rotation ring is welded to the engine-side casting and the second bearing installation portion. .

In addition, it may further include a sealing part coupled to the stern side of the first flange and the bow side of the second flange.

According to another aspect of the present invention, there is provided a method of installing a stern tube assembly installed on a hull to surround the propeller shaft of a ship, comprising: preparing a bearing housing in which one or more bearings are installed; Inserting the bearing housing into the hull; fixing the bearing housing to the hull; And a method of installing a stern tube assembly may be provided, including the step of injecting resin between the hull and the bearing housing.

The bearing housing may have the same outer diameter throughout its length.

In addition, in the step of preparing the bearing housing, a first bearing installation part inserted into the propeller-side casting of the hull, a second bearing installation part inserted into the engine-side casting formed to be spaced apart from the propeller-side casting, and the first bearing installation part A connection part connecting the first bearing installation part and the second bearing installation part can be formed integrally.

Additionally, the first bearing installation part and the second bearing installation part may be manufactured by bending a metal plate.

In addition, in the step of inserting the bearing housing into the hull, the bearing housing is selected from one of a method of inserting the bearing housing from the stern side of the hull toward the bow and a method of inserting the bearing housing from the bow side of the hull toward the stern. and can be inserted into the hull.

In addition, in the step of fixing the bearing housing to the hull, a first flange and a second flange are bolted to the stern side and the bow end of the bearing housing, respectively, and at least one of the first flange and the second flange is provided. Can be bolted to the bearing housing after the bearing housing is inserted into the hull.

In addition, in the step of fixing the bearing housing to the hull, a first anti-rotation ring is welded to the propeller-side casting and a first flange coupled to the stern-side end of the bearing housing, and the engine-side casting and the second A second anti-rotation ring can be welded to the bearing installation part.

In addition, before the step of fixing the bearing housing to the hull, the step of aligning the axis so that the center of the bearing housing and the center of the propeller shaft coincide with the state in which the bearing housing is inserted into the hull may be further included.

In the present invention, the bearing housing inserted into the hull has the same outer diameter throughout its longitudinal direction, thereby simplifying the structure and facilitating the sliding of the bearing housing on the hull, thereby improving the convenience of installation of the stern tube assembly. You can.

In addition, the first and second bearing installation parts constituting the bearing housing are manufactured using a bending method using a metal plate and formed integrally with the connection part, thereby making it economical by minimizing the composition manufactured by forging or casting and reducing costs accordingly. You can.

In addition, by separately providing the stern and bow side flanges of the stern tube assembly, the stern tube assembly can be installed either on the stern side or the bow side of the hull block depending on the site situation.

In addition, in fixing the stern tube assembly to the hull block, the stern tube assembly is fixed to the hull block through welding of an anti-rotation ring rather than the conventional bolt fastening method, and since screw tap construction for bolt fastening is not required, the stern tube assembly Not only can the outer shape of the assembly be reduced, but it can also have the effect of making the installation of the stern tube assembly faster and easier.

Additionally, the anti-rotation ring welded to the stern tube assembly and the hull block can have the effect of fixing the stern tube assembly to the hull block and simultaneously performing the role of sealing between the stern tube assembly and the hull block.

1 is a diagram showing the schematic configuration of a stern tube assembly according to an embodiment of the present invention.
FIG. 2 is an enlarged view showing the bearing housing of FIG. 1 separated.
Figure 3 is a diagram showing area 'A' in Figure 1.
Figure 4 is a diagram showing area 'B' in Figure 1.
Figure 5 is a diagram showing area 'C' in Figure 1.
Figure 6 is an enlarged view of a partial area of Figure 5.
Figure 7 is a diagram for explaining a method of installing a stern tube assembly according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. First, when adding reference numerals to components in each drawing, it should be noted that identical components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description will be omitted. In addition, preferred embodiments of the present invention will be described below, but the technical idea of the present invention is not limited or restricted thereto, and of course, it can be modified and implemented in various ways by those skilled in the art.

In explaining the present invention, the body of the ship is defined as 'hull', 'front' and 'rear' are expressed based on the longitudinal direction (longitudinal direction) of the hull, and in the attached drawings, the left side indicates the bow direction. The right side indicates the stern direction.

Figure 1 is a diagram showing the schematic configuration of a stern tube assembly according to an embodiment of the present invention, Figure 2 is a diagram showing the bearing housing of Figure 1 separated, and Figures 3 to 5 are 'A' of Figure 1. This diagram shows areas ', 'B', and 'C' respectively.

In addition, FIG. 6 is an enlarged view of a partial area shown in FIG. 5, and FIG. 7 is a view for explaining a method of installing a stern tube assembly according to an embodiment of the present invention.

The present invention relates to a stern tube assembly (100) installed on a ship body to surround the propeller shaft (P) and supporting the propeller shaft (P), including a bearing housing (110), flange portions (120, 130), Includes fixing parts 140 and 150.

Referring to Figure 1, the hull is formed with a propeller side casting 10 and an engine side casting 20 spaced apart from the propeller side casting 10 in the bow direction. The bearing housing 110 is formed with the propeller side casting 10. Both ends are respectively inserted into the engine side casting 20, and the propeller shaft (P) is inserted through the inside to connect the propeller and the engine.

One or more resin injection holes 11 and 21 may be formed on the outer peripheral surfaces of each of the propeller-side casting 10 and the engine-side casting 20 for injecting resin into the space S, which will be described later.

Referring to Figure 1, it is shown that a pair of resin injection ports 11 and 21 are provided in each of the propeller side casting 10 and the engine side casting 20, spaced apart from each other. However, the length of the resin installation area, that is, Depending on the length of the propeller side casting 10 and the engine side casting 20, three or more may be formed.

When a pair of resin injection ports (11, 21) are provided in each of the propeller-side casting (10) and the engine-side casting (20) to be spaced apart from each other, resin is injected through at least one of the pair of resin injection ports (11, 21). Preferably, the resin is injected through one of a pair of resin injection ports 11 and 21, and the other is an air vent for discharging the air or gas filled in the space (S). It can be arranged to serve as an air-vent.

In addition, each of the propeller side casting 10 and the engine side casting 20 has a plurality of plurality along the circumferential direction of the bearing housing 110 in order to adjust the axis to be aligned with the center of the propeller shaft P of the bearing housing 110. Two jack bolt fastening grooves (not shown) may be further formed.

The bearing housing 110 includes a first bearing installation part 111 inserted into the propeller-side casting 10, a second bearing installation part 113 inserted into the engine-side casting 20, and a first bearing installation part. It may include a connection portion 115 integrally formed between the 111 and the second bearing installation portion 113, and one or more bearings 110a may be installed therein.

Specifically, one or more stern bearings 110a supporting the propeller shaft P are installed inside the first bearing installation part 111, and inside the second bearing installation part 113, the first bearing installation part Similar to (111), one or more bow bearings (110b) may be installed to support the propeller shaft (P).

Here, the stern bearing 110a and the bow bearing 110b are respectively installed inside the first bearing installation part 111 and the second bearing installation part 113 before inserting the bearing housing 110 into the hull block. It can be fixedly installed using hydraulic fitting.

The stern tube assembly 100 according to an embodiment of the present invention is installed at the stern inside the first bearing installation part 111 and the second bearing installation part 113 before inserting the bearing housing 110 into the hull block. By installing the bearing 110a and the bow bearing 110b in advance, more precise machining work is possible and the accuracy and convenience of bearing installation work can be improved.

In this embodiment, although not shown in the drawing, a lubricant supply pipe (not shown) for supplying lubricant to the stern bearing 110a and the bow bearing 110b before inserting the bearing housing 110 into the hull block. A temperature sensor (not shown) may be additionally installed to check the temperature of the stern bearing 110a and the bow bearing 110b.

The temperature sensor is provided to measure the temperature of at least one of the stern bearing 110a and the bow bearing 110b, and may preferably be installed adjacent to the inner peripheral surface of the stern bearing 110a and the bow bearing 110b. there is.

Meanwhile, the first bearing installation part 111 and the second bearing installation part 113 of this embodiment are manufactured by bending a metal plate, and the first bearing installation part 111 and the second bearing The installation portion 113 and the connecting portion 115 all have the same outer diameter (D).

Conventionally, the outer diameters are different between the bush housing installed at both ends of the stern tube and the stern tube connected between the bush housings, creating a step in the longitudinal direction, and during the process of inserting the stern tube assembly into the hull block. Inconvenience occurred due to the above-mentioned step difference.

Additionally, in the prior art, the bush housing and the flange coupled to the bush housing were manufactured using a forging or casting method, unlike the stern tube, which had the problem of lowering productivity and increasing processing costs.

The stern tube assembly 100 according to an embodiment of the present invention has a uniform outer diameter (D) throughout the longitudinal direction of the bearing housing 110, so that sliding can be facilitated when inserted into the hull block, thereby reducing the stern This can have the effect of improving the convenience of installing the tube assembly.

In addition, the stern bearing installation part 111 and the bow bearing installation part 113 are manufactured by a bending method using a metal plate and are formed integrally with the connection part 115, and only the configuration of the flange parts 120 and 130, which will be described later, are forged. Alternatively, by manufacturing by casting, it can be economically feasible through minimizing the components manufactured by forging or casting and thereby reducing costs.

When installing a stern tube assembly on a hull block, conventionally, a flange portion with an expanded diameter is formed integrally at the stern side end, and the stern tube assembly is installed by inserting it from the stern of the hull block in the forward direction.

At this time, space must be secured in the rear area of the stern of the hull block to insert the stern tube assembly. In particular, when dismantling the stern tube assembly for maintenance, etc., the rudder provided on the stern side of the propeller must be removed, making the work difficult. Not only is it complicated, but it also takes a lot of time.

In the present invention, when installing the stern tube assembly 100 on a hull block, the stern side and bow side flanges of the stern tube assembly 100 are separately provided, so that the stern tube assembly 100 can be installed anywhere on the stern side and bow side of the hull block. ) is possible to install and the installation method can be applied differently depending on the site situation.

The flange portion may include a first flange 120 installed at the stern end of the first bearing installation portion 111 and a second flange 130 installed at the bow end of the second bearing installation portion 113. The fixing part includes a first anti-rotation ring 140 coupled to the stern end of the propeller side casting 10, and a second anti-rotation ring 150 coupled to the bow end of the engine side casting 20. may include.

Hereinafter, for convenience in explaining the invention, the first flange 120 and the first anti-rotation ring 140 will be described first, and the second flange 130 and the second anti-rotation ring 150 will be described later. .

As shown in FIG. 3, the first flange 120 may be installed at the stern end of the first bearing installation portion 111.

Referring to FIG. 3, the stern end of the first bearing installation portion 111 is located on the bow side rather than the stern end of the propeller side casting 10, and the first flange 120 is attached to the propeller side casting 10. At least a portion may be inserted and bolted to the stern end of the first bearing installation portion 111.

Specifically, the first flange 120 is formed with a flange body 121 having a larger diameter than the first bearing installation portion 111 and extending from the flange body 121 toward the propeller shaft P. It may be composed of a bolt fastening portion 123 that is bolted to the stern end of the first bearing installation portion 111.

Here, the stern-side end of the flange body 121 may be located on the same plane as the stern-side end of the propeller-side casting 10, and the fixing bolt 120a passes through the bolt fastening portion 123. 1 Can be fastened to the bearing installation portion 111.

The first flange 120 of this embodiment further includes a protruding end 125 protruding from the flange body 121 in the stern direction, so that a first anti-rotation ring 140 described later can be coupled to the flange. It may be desirable for the body portion 121, the bolt fastening portion 123, and the protruding end portion 125 to be formed integrally.

The first anti-rotation ring 140 may be fixed to the stern end of the propeller side casting 10 on the outer peripheral surface of the first flange 120.

Referring to FIG. 3, the inner circumferential surface of the first anti-rotation ring 140 is located on the outer circumferential surface of the first flange 120, and one side of the first anti-rotation ring 140 may be positioned in contact with the stern end of the propeller side casting 10. .

Specifically, the first anti-rotation ring 140 is located on the outer peripheral surface of the protruding part 125 of the first flange 120, and is located on the stern end of the propeller side casting 10 and the outer peripheral surface of the protruding end 125, respectively. Can be joined by welding.

Meanwhile, sealing means 160 are installed on both sides of the space S between the first bearing installation part 111 and the propeller side casting 10, so that when resin is injected into the space S, the resin flows outward. It can be prevented from coming out.

As shown in FIGS. 3 and 4, the sealing means 160 is a sponge 161 inserted into both sides of the space S between the first bearing installation part 111 and the propeller side casting 10. may include.

In addition, a dam plate 163 (see FIG. 4) is additionally coupled to the bow end of the propeller side casting 10 to prevent the sponge 161 from being released to the outside due to resin injection. .

The dam plate 163 may be coupled to either the propeller side casting 10 or the outer peripheral surface of the first bearing installation portion 111 through a bolt fastening method. However, for convenience of construction work, the first bearing installation portion 111 ) It may be desirable to pre-process a bolt tap on the outer circumferential surface and bolt the dam plate 163 to the outer circumferential surface of the first bearing installation portion 111 before resin injection.

Additionally, the dam plate 163 may be removed after the resin construction work is completed.

In this embodiment, the first anti-rotation ring 140 serves to fix the first bearing installation portion 111, that is, the bearing housing 110, to the propeller-side casting 10, and also serves to secure the first bearing installation portion 111, that is, the bearing housing 110, to the propeller-side casting 10. It can simultaneously serve as a dam to prevent the sponge 161 from being released to the outside at the stern end.

Referring to Figures 3 and 4, it is shown that one sponge 161 is installed on each side of the space S between the propeller side casting 10 and the first bearing installation part 111, but in the present invention is not limited to this, and a plurality of them may be installed on both sides of the space (S).

In the stern tube assembly 100 according to an embodiment of the present invention, the first anti-rotation ring 140 is coupled to the stern end of the propeller side casting 10 to serve as a dam plate 163, When injecting resin, there is no need to attach and remove the dam plate 163 from the relevant area, which can have the effect of simplifying construction.

The sealing means 160 of this embodiment can be equally applied to the space S formed between the second bearing installation portion 113 and the engine side casting 20, which will be described later.

On the stern side of the first flange 120, there is a sealing part 170 to prevent seawater from flowing into the bearing housing 110, and a tube line (not shown) for supplying oil and air into the sealing part 170. ) can be installed more.

In this embodiment, the tube line, similar to the lubricating oil supply line, may be pre-installed in the bearing housing 110 before inserting the bearing housing 110 into the hull block.

The second flange 130 may be installed at the bow end of the second bearing installation portion 113, as shown in FIGS. 5 to 6.

Specifically, the second flange 130, similar to the first flange 120, includes a flange body 131 having a larger diameter than the second bearing installation portion 113, and a propeller from the flange body 131. It may be composed of a bolt fastening portion 133 that extends toward the axis P and is bolted to the bow side end of the second bearing installation portion 113.

Referring to FIG. 5, the bow side end of the second bearing installation portion 113 is located on the bow side rather than the bow side end of the engine side casting 20, and the second flange 130 is located on the bow side of the engine side casting 20. It can be spaced in the bow direction from the bow side end.

In addition, the second flange 130, similar to the first flange 120, has a fixing bolt 130a that passes through the bolt fastening portion 133 and is fastened to the bow end of the second bearing installation portion 113. It may be desirable for the flange body portion 131 and the bolt fastening portion 133 to be formed integrally.

Meanwhile, a nozzle 30 may be installed on the outer peripheral surface of the second bearing installation portion 113 between the second flange 130 and the engine side casting 20.

Conventionally, a flange is coupled to the bow end of the engine side casting, and a nozzle is installed penetrating the outer peripheral surface of the flange. The flange is coupled after the bearing housing is inserted into the hull block, and the bearing is installed after the final assembly is completed. The lubricant supply line and the nozzle 30 are connected inside the housing 110.

In this embodiment, the lubricating oil supply line is already installed inside the bearing housing 110 and the nozzle 30 is installed on the outer peripheral surface of the second bearing installation portion 113, so that the lubricating oil supply line and the nozzle 30 are installed. Connecting the lubricant supply line may be done first.

In addition, the stern tube assembly 100 according to an embodiment of the present invention may further include a second anti-rotation ring 150 for fixing the bearing housing 110 to the engine side casting 20.

As shown in FIG. 6, the second anti-rotation ring 150 may be positioned in contact with the bow end of the engine side casting 20 on the outer peripheral surface of the second bearing installation portion 113, and the second bearing It may be respectively welded to the outer peripheral surface of the installation portion 113 and the bow side end of the engine side casting 20.

In this embodiment, the second flange 130 is spaced apart from the bow end of the engine side casting 20, so the inner peripheral surface of the second anti-rotation ring 150 is located on the outer peripheral surface of the second bearing installation portion 113. and may not be coupled to the second flange 130.

In addition, the second anti-rotation ring 150 is welded to the outer peripheral surface of the second bearing installation portion 113, and therefore has a smaller diameter than the first anti-rotation ring 150 welded to the outer peripheral surface of the first flange 120. You can have

In the stern tube assembly 100 according to an embodiment of the present invention, unlike the prior art, in fixing the bearing housing 110 to the hull block, thread taps are installed for fastening a plurality of bolts to the hull block. Since this is unnecessary, it can have the effect of shortening field installation work time.

In this embodiment, sealing means 160 are installed on both sides of the space S between the second bearing installation portion 113 and the engine side casting 20, and the resin injection port 21 of the engine side casting 20 When injecting resin through , the resin can be prevented from flowing out.

Referring to Figures 5 and 6, sponges 161 are inserted on both sides of the space S between the second bearing installation portion 113 and the engine side casting 20, and the stern of the engine side casting 20 A dam plate 163 may be installed in close contact with the side end to prevent the sponge 161 from being released to the outside, and the dam plate 163 may be removed after resin injection is completed.

In addition, the sponge 161 may be installed one on each side of the space S between the second bearing installation part 113 and the engine side casting 20, or a plurality of sponges 161 may be installed on both sides of the space S. It could be.

The second anti-rotation ring 150 of this embodiment, similar to the first anti-rotation ring 140, fixes the bearing housing 110 to the engine side casting 20 and also secures the bearing housing 110 to the engine side casting 20. It can play a role in preventing the sponge 161 inserted on the stern side from coming out.

In addition, on the bow side of the second flange 130, similar to the first flange 130, a sealing part 170 may be installed, and oil and air may flow into the sealing part 170 through a pre-installed tube line. can be supplied.

In this embodiment, a nozzle 30 is installed on the outer peripheral surface of the second bearing installation portion 113 between the second flange 130 and the engine side casting 20, and the bearing housing 110 is installed through the nozzle 30. ) Oil is injected inside to lubricate the propeller shaft (P).

In this embodiment, the sealing portion 170 installed on the bow side of the second flange 130 may serve to prevent the oil inside the bearing housing 110 from leaking into the ship (i.e., the engine room).

Hereinafter, a method of installing the stern tube assembly 100 according to an embodiment of the present invention will be briefly described.

The installation method of the stern tube assembly 100 according to an embodiment of the present invention includes preparing a bearing housing 110 in which one or more bearings 110a and 110b are installed, and installing the bearing housing 110 on the hull. ) may include the step of inserting, fixing the bearing housing 110 to the hull, and injecting resin between the hull and the bearing housing 110.

In the step of preparing the bearing housing 110, the first bearing installation part 111, the second bearing installation part 113, and the connection part 115 are formed as one piece, and the first bearing installation part 111 and the second bearing installation part 111 are formed. 2 The bearing installation portion 113 and the connecting portion 115 all have the same outer diameter (D), so the bearing housing 110 can be provided with the same outer diameter throughout its longitudinal direction.

Here, the first bearing installation part 111 and the second bearing installation part 113 may be manufactured by bending a metal plate.

Meanwhile, in the step of fixing the bearing housing 110 to the hull, the first flange 120 and the second flange 130 can be bolted to the stern and bow ends of the prepared bearing housing 110, respectively.

At this time, at least one of the first flange 120 coupled to the stern side of the bearing housing 110 and the second flange 130 coupled to the bow side of the bearing housing 110 is inserted into the hull. One can be bolted to the bearing housing 110 before installation, and the other one can be bolted to the bearing housing 110 after the bearing housing 110 is inserted into the hull.

In the installation method of the stern tube assembly 100 according to an embodiment of the present invention, when inserting the bearing housing 110 into the hull, as shown in FIG. 7, the bearing housing 110 is installed from the stern side of the hull. Either a method of inserting in the bow direction or a method of inserting from the bow side of the hull (i.e. engine room) in the stern direction can be selected and applied.

Figure 7 (a) is a diagram showing a method of inserting and installing the bearing housing 110 in the bow direction from the rear area of the hull block, and Figure 7 (b) shows the bearing housing 110 being inserted and installed from the front area of the hull block in the stern direction. This is a diagram showing how to insert and install (110).

The installation method of the stern tube assembly 100 according to an embodiment of the present invention is different from the conventional method in which the bush housing could be inserted only from the stern side of the hull block in the bow direction, and is installed from the rear of the stern of the hull block depending on the site situation. It may be possible to insert the bearing housing 110 in the bow direction, or from the front of the hull block (i.e., engine room) to the stern direction.

In particular, when the bearing housing 110 is inserted from the engine room toward the stern during disassembly and reinstallation of the stern tube assembly 100 for maintenance, etc., it is necessary to remove the rudder (R) provided on the stern side of the propeller. Therefore, the installation or disassembly work time of the stern tube assembly 100 can be shortened.

In the step of fixing the bearing housing 110 to the hull, a first anti-rotation ring 140 is welded to the stern end of the propeller side casting 10 and the outer peripheral surface of the first flange 120, and the engine side casting 20 ) The second anti-rotation ring 150 can be welded to the bow side end of the and the bow side end of the second bearing installation portion 113.

In this embodiment, before the step of fixing the bearing housing 110 to the hull, the axis is adjusted so that the center of the bearing housing 110 and the center of the propeller shaft (P) coincide with the bearing housing 100 being inserted into the hull. A sorting step may be further included.

Finally, with the stern tube assembly 100 completely fixed, the propeller shaft (P) is installed penetrating into the bearing housing 110, and a plurality of bearings 110a and 110b are installed inside the bearing housing 110. ) and the propeller shaft (P) can be subjected to a bearing slope test to check whether the contact pressure acts uniformly across the longitudinal direction of the bearing housing 110.

At this time, the inner diameter of the stern bearing 110a is installed at an angle toward the stern in consideration of the bending phenomenon of the shaft due to the weight of the propeller. Conventionally, machining of the bow and stern casting is performed with the bearing housing 110 assembled on the hull. Since the bearings are inserted afterward, if there is a problem during the bearing slope inspection, the existing bearings must be removed and replaced with new bearings, which may result in an increase in the construction period and cost of the ship.

The stern tube assembly 100 according to an embodiment of the present invention is manufactured by processing the bearing housing 110 and hydraulically fitting the bearings 110a and 110b in a processing shop capable of more precise processing, and then casting the propeller side of the hull. By inserting (10) and the engine side casting (20) into the correct position, the risk of quality control can be reduced and the accuracy and convenience of bearing installation work can be increased.

In the present invention, the bearing housing inserted into the hull has the same outer diameter throughout its longitudinal direction, thereby simplifying the structure and facilitating the sliding of the bearing housing on the hull, thereby improving the convenience of installation of the stern tube assembly. You can.

In addition, the first and second bearing installation parts that make up the bearing housing are manufactured using a bending method using metal plates and formed integrally with the connection part, making it possible to achieve economic efficiency by minimizing the composition manufactured by forging or casting and thereby reducing costs. there is.

In addition, by separately providing the stern and bow side flanges of the stern tube assembly, the stern tube assembly can be installed either on the stern side or the bow side of the hull block depending on the site situation.

In addition, in fixing the stern tube assembly to the hull block, the stern tube assembly is fixed to the hull block through welding of an anti-rotation ring rather than the conventional bolt fastening method, and since screw tap construction for bolt fastening is not required, the stern tube assembly Not only can the outer shape of the assembly be reduced, but it can also have the effect of making the installation of the stern tube assembly faster and easier.

Additionally, the anti-rotation ring welded to the stern tube assembly and the hull block can have the effect of fixing the stern tube assembly to the hull block and simultaneously performing the role of sealing between the stern tube assembly and the hull block.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications, changes, and substitutions can be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the attached drawings are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments and the attached drawings. . The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

100: Stun tube assembly
110: bearing housing
111: Stern bearing installation part
113: Bow bearing installation part
115: connection part
120: first flange
130: second flange
140: First anti-rotation ring
150: Second anti-rotation ring
160: sealing means
170: Sealing part
10: Propeller side casting
20: Engine side casting
P: propeller shaft
R: Rudder

Claims (14)

A stern tube assembly installed on the hull to surround the propeller shaft of the ship,
a bearing housing whose both ends are inserted into the propeller-side casting of the hull and the engine-side casting formed to be spaced apart from the propeller-side casting;
Flange portions installed on the stern side and bow side ends of the bearing housing, respectively; and
It includes a fixing part for fixing the bearing housing to the propeller-side casting and the engine-side casting,
A stern tube assembly wherein the bearing housing has the same outer diameter throughout its longitudinal direction. According to clause 1,
The bearing housing is,
a first bearing installation portion that is inserted into the propeller-side casting and has one or more stern bearings installed therein to support the propeller shaft;
a second bearing installation portion that is inserted into the engine-side casting and has one or more bow bearings installed therein to support the propeller shaft; and
A stern tube assembly including a connection portion integrally formed between the first bearing installation portion and the second bearing installation portion. According to clause 2,
A stern tube assembly in which the first bearing installation part and the second bearing installation part are manufactured by bending a metal plate. According to clause 2,
The flange part,
A first flange bolted to the stern end of the first bearing installation portion; and
A stern tube assembly including a second flange bolted to the bow side end of the second bearing installation portion. According to clause 4,
The stern end of the first bearing installation portion is located on the bow side rather than the stern end of the propeller side casting, so that at least a portion of the first flange is inserted into the propeller side casting,
The bow side end of the second bearing installation portion is located on the bow side of the engine side casting, and the second flange is spaced apart from the bow side end of the engine side casting in the bow direction. According to clause 4,
The fixing part,
a first anti-rotation ring located on the outer peripheral surface of the first flange portion and having one side in contact with the stern end of the propeller-side casting; and
A stern tube assembly including a second anti-rotation ring on an outer peripheral surface of the second bearing installation portion, one side of which is positioned in contact with the bow end of the engine-side casting. According to clause 6,
The first anti-rotation ring is welded to the propeller-side casting and the first flange portion, and the second anti-rotation ring is welded to the engine-side casting and the second bearing installation portion. According to clause 4,
A stern tube assembly further comprising a sealing portion coupled to the stern side of the first flange and the bow side of the second flange. A method of installing a stern tube assembly installed on the hull to surround the propeller shaft of a ship,
Preparing a bearing housing into which one or more bearings are installed;
Inserting the bearing housing into the hull;
fixing the bearing housing to the hull; and
Comprising the step of injecting resin between the hull and the bearing housing,
A method of installing a stern tube assembly wherein the bearing housing has the same outer diameter throughout its longitudinal direction. According to clause 9,
In the step of preparing the bearing housing,
A first bearing installation part inserted into the propeller-side casting of the hull, a second bearing installation part inserted into an engine-side casting formed to be spaced apart from the propeller-side casting, and the first bearing installation part and the second bearing installation part. Forming an integral connection between the
A stern tube assembly installation method in which the first bearing installation part and the second bearing installation part are manufactured by bending a metal plate. According to clause 9,
In the step of inserting the bearing housing into the hull,
A method of installing a stern tube assembly in which the bearing housing is inserted into the hull by selecting one of a method of inserting the bearing housing from the stern side of the hull toward the bow and a method of inserting the bearing housing from the bow side of the hull toward the stern. According to clause 11,
In the step of fixing the bearing housing to the hull,
The first flange and the second flange are respectively bolted to the stern and bow ends of the bearing housing,
A method of installing a stern tube assembly in which at least one of the first flange and the second flange is bolted to the bearing housing after the bearing housing is inserted into the hull. According to clause 10,
In the step of fixing the bearing housing to the hull,
A first anti-rotation ring is welded to the first flange coupled to the propeller side casting and the stern end of the bearing housing,
A method of installing a stern tube assembly in which a second anti-rotation ring is welded to the engine side casting and the second bearing installation portion. According to clause 9,
Before fixing the bearing housing to the hull,
A method of installing a stern tube assembly further comprising aligning the axis so that the center of the bearing housing coincides with the center of the propeller shaft when the bearing housing is inserted into the hull.

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