KR20110136484A

KR20110136484A - Shoulder bearing unit for propeller shaft in stern tube

Info

Publication number: KR20110136484A
Application number: KR1020100056531A
Authority: KR
Inventors: 최성태
Original assignee: 삼성중공업 주식회사
Priority date: 2010-06-15
Filing date: 2010-06-15
Publication date: 2011-12-21

Abstract

PURPOSE: Damage by interference can be minimized in the installation of the propeller shaft. Easily, it can manufacture. The damage of the propeller shaft by the rubbing can be prevented. CONSTITUTION: A shoulder bearing unit for propeller shaft comprises a welding block(11), a bearing body(13), and a slip layer(15). The welding block welds in one side of the inner circumference of the stern tube. The bearing body has a shaft support plane(23) upon the upper side. It forms a fitting portion(30) between the upper side of the welding block and it is settled in the upper side of the welding block and the bearing body is fixed and coupled. The slip layer is formed in the front side of the axial bearing surface.

Description

Shoulder bearing unit for propeller shaft {SHOULDER BEARING UNIT FOR PROPELLER SHAFT IN STERN TUBE}

The present invention relates to a shoulder bearing unit for a propeller shaft, and more particularly, to a propeller shaft shoulder bearing unit that can prevent damage due to shaft deflection when the propeller shaft is installed in a state of being installed inside a relatively long stern tube. It is about.

In general, the stern tube (stern tube) of the ship is a tubular installation space of the propeller shaft is installed at the stern end, as shown in Figure 1, the stern tube bush 103 is installed inside the stern tube 101 Through and supporting the front and rear ends of the propeller shaft 105 through.

The stern tube bush 103 is arranged inside the stern tube 101 such that the contact pressure with the propeller shaft 105 is generated evenly over the bearing longitudinal direction in consideration of its own weight, seawater buoyancy, thrust moment, and the like. Do this.

On the other hand, when the stern tube bush 103 is not installed between the bow side of the stern tube 101 and the propeller shaft 105, or the stern tube bush 103 is installed on the bow and stern sides of the stern tube 101. If the distance between the long when the propeller shaft 105 is installed in the stern tube 101, the shoulder bearing 107 is installed on one side of the stern tube 101 in order to prevent damage caused by the shaft sag.

As shown in FIG. 2, the conventional shoulder bearing 107 has a curved surface such that the lower surface 109 is fastened to the inner circumferential surface of the stern tube 101, and the upper surface that becomes the shaft support surface 111 is a propeller shaft ( White metal 113 of a softer material than the propeller shaft 105 is coated with a curved surface having the same radius of curvature as 105 to prevent frictional damage of the propeller shaft 105.

However, the conventional shoulder bearing 107 is composed of a single body to be produced by varying the height according to the specifications of the propeller shaft 105, the shaft support surface 111 is made of curved surface propeller shaft inside the stern tube 101 When the 105 is installed, the end of the propeller shaft 105 comes into contact with the edge portion E of the shaft support surface 111 to cause damage to the end of the propeller shaft 105.

In addition, in the conventional shoulder bearing 107, the shaft support surface 111 is made of a curved surface, and the white metal 113 is coated on the inner circumferential surface of the tubular material by centrifugal force in the same manner as in the method of manufacturing the stern tube bush 103. Since it is cut and manufactured to a certain standard, there was a disadvantage in that the production period and production cost are excessively required.

Therefore, the present invention has been invented to solve the above-mentioned disadvantages, the problem to be solved by the present invention is a bearing body is installed on the inner circumferential surface of the stern tube through a separate welding block according to the standard, it is possible to adjust the height of the specifications of the propeller shaft To provide a shoulder bearing unit for the propeller shaft, the shaft support surface of the bearing body has an inclined surface at the front and rear end in the axial direction on the plane to minimize the damage caused by the interference when the propeller shaft is installed.

Another problem to be solved by the present invention is to configure the shaft support surface of the bearing body in a flat surface and to form a slip layer of carbon composite material on the surface, it is easy to manufacture and to prevent damage to the propeller shaft by friction propeller shaft shoulder To provide a bearing unit.

The propeller shaft shoulder bearing unit according to an aspect of the present invention for realizing the technical problem as described above,

A welding block welded to one side of the inner circumferential surface of the stern tube, and a fitting portion formed between the upper surface of the welding block and fastened through the mutual fastening part in a state seated on the upper surface of the welding block, the bearing having an axial support surface on the upper surface A body, and a slip layer formed on the entire cross section of the axial support surface.

The fitting portion may include a fitting end projecting upward in an axial center portion of the welding block, and a fitting groove formed on a lower surface of the bearing body corresponding to the fitting end.

Here, the fitting portion may have the height (h) of the fitting end and the depth (d) of the fitting groove, the length (l) of the fitting end and the width (w) of the fitting groove.

The fastening part may be formed of a fastening hole formed before and after the axial direction of the welding block, and a fastening end having a through hole protruding from the lower end before and after the axial direction of the bearing body, respectively.

The bearing body may be formed as an inclined surface before and after the axial direction of the shaft support surface.

The slip layer may be formed of a carbon-panol composite resin layer.

The slip layer may be formed in a panel shape and adhered to the shaft support surface.

According to the propeller shaft shoulder bearing unit according to an embodiment of the present invention, by installing a bearing body on the inner circumferential surface of the stern tube through a separate welding block for each standard, it is possible to cope with the height adjustment according to the specification of the propeller shaft, the bearing body in common There is an applicable advantage.

In addition, an embodiment of the present invention is to form a shaft support surface of the bearing body in a flat, and to have an inclined surface on the front and rear end there is an effect of minimizing damage due to interference when installing the propeller shaft.

In addition, an embodiment of the present invention is to configure the shaft support surface of the bearing body in a flat surface and to adhere the slip layer of the carbon composite material on the surface, it can be easily manufactured, inducing slip rather than friction to the friction of the propeller shaft There is an effect to prevent damage.

1 is a side cross-sectional view of a stern tube assembly to which a shoulder bearing according to the prior art is applied.
Figure 2 is a front cross-sectional view of the shoulder bearing according to the prior art.
3 is a side cross-sectional view of the stern tube assembly to which the shoulder bearing unit according to the embodiment of the present invention is applied.
4 is an exploded perspective view of a shoulder bearing unit according to an embodiment of the present invention.
5 is a side cross-sectional view of the shoulder bearing unit according to the embodiment of the present invention.
6 is a cross-sectional view taken along line AA of FIG. 3.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail as follows.

Referring to FIG. 3, when the shoulder bearing unit 1 according to an embodiment of the present invention has a long distance between the bow of the stern tube 3 and the stern tube bush 5 installed on the stern side, the stern tube is long. (3) When installing the propeller shaft (7) inside, it is installed on one side inside the stern tube (3) to prevent damage caused by the deflection of the shaft.

As shown in FIGS. 4 and 5, the shoulder bearing unit 1 includes a welding block 11, a bearing body 13, and a slip layer 15.

The welding block 11 is welded to the lower surface 21 on one side of the inner circumferential surface of the stern tube 3, wherein the lower surface 21 of the welding block 11 is in close contact with the inner circumferential surface of the stern tube 3 It is formed as a curved surface having the same radius of curvature as the stern tube 3 in the width direction so as to be welded in a state.

The welding block 11 is manufactured in various dimensions by standardizing to set the height of the bearing body 13 according to the specifications of the propeller shaft (7), so that the bearing body 13 is made of only one dimension and commonly It is possible to apply.

The bearing body 13 has an axial support surface 23 formed in a plane on its upper surface, and its lower surface 25 forms a fitting portion 30 with an upper surface 27 of the welding block 11. Thus, the welding block 11 is fastened to each other in a state seated on the upper surface (27).

That is, the fitting portion 30 is integrally formed with the fitting end 31 protruding vertically upward in the center portion of the axial direction of the welding block 11. In addition, the fitting groove 33 is formed in the lower surface 25 of the bearing body 13 corresponding to the fitting end 31.

At this time, the fitting portion 30 is preferably made of the same height (h) of the fitting end 31 and the depth (d) of the fitting groove 33, specifically, the length of the fitting end 31 ( 1) and the width w of the corresponding fitting groove 33 are also equal, so that the stress caused by the load of the propeller shaft 7 to be transmitted is ideally distributed.

In addition, the welding block 11 and the bearing body 13 are fastened to each other by bolts 50 through the front and rear fastening portions 40.

Each of the fastening portions 40 is formed before and after the axial direction of the welding block 11 and has a fastening hole 41 having a thread N along the inner circumferential surface, and before the axial direction of the bearing body 13, After the protruding to the lower end is composed of a fastening end 43 having a through hole 45 corresponding to the fastening hole (41).

In addition, the bearing body 13 is formed in the inclined surface 23a at the front and rear ends of the shaft supporting surface 23 in the axial direction. That is, when the propeller shaft 7 is installed in the stern tube 3 through the inclined surface 23a, interference with the end of the propeller shaft 7 is minimized.

By forming the inclined surface 23a at both end portions of the shaft support surface 23, the installation direction of the bearing body 13 with respect to the welding block 11 can be reversed, thereby providing an advantage of assembly.

Meanwhile, the slip layer 15 is formed on the entire surface of the shaft support surface 23 (including the inclined surface 23a). In the present embodiment, the slip layer 15 is formed of a carbon-phenol composite resin layer of carbon composite material. Applied.

The carbon-phenol composite resin layer is softer than the propeller shaft 7 and does not cause frictional damage to the propeller shaft 7 when friction with the propeller shaft 7.

It is preferable that the slip layer 15 is manufactured in the form of a panel and adhered to the entire surface of the shaft support surface 23 (including the inclined surface 23a) using an adhesive.

Therefore, the installation of the shoulder bearing unit 1 for the propeller shaft 7 having the configuration as described above, as shown in Figure 6, the welding block 11 conforming to the standard on the lower side of the inner peripheral surface of the stern tube 3 First, fix it by welding.

Subsequently, in the state where the fitting groove 33 of the bearing block 13 is fitted to the fitting end 31 of the welding block 11, the welding block (through the front and rear through holes 45 of the bearing body 13) 11) is installed by fastening the bolt 50 to the front and rear fastening holes 41.

Thus, when the propeller shaft 7 is installed inside the stern tube 3 while the shoulder bearing unit 1 according to the present embodiment is mounted on one side of the lower inner circumferential surface of the stern tube 3, the propeller shaft ( In the installation process of 7), even if the shaft sag occurs on one side of the propeller shaft (7) is supported by the shaft support surface 23 of the bearing body 13 to prevent bending or deformation of the shaft.

In addition, the shaft support surface 23 of the bearing body 13 is formed in a plane, when the propeller shaft (7) is installed, the probability of interference as the end enters as compared to the existing curved surface is reduced, and at the same time the shaft support surface (23) The front and rear ends of the c) are formed as the inclined surface 23 to guide the ends of the propeller shaft 7 to prevent damage.

In addition, the shoulder bearing unit 1 according to the present embodiment is easy to manufacture by forming the axial support surface 23 of the bearing body 13 in a plane, by bonding the slip layer 15, the production period And manufacturing costs are minimized.

As described above, the present invention has been described through the limited embodiments and the drawings, but the present invention is not limited thereto, and the technical idea of the present invention and the patents described below by those skilled in the art to which the present invention pertains. Various modifications and variations are possible within the scope of the claims.

1: shoulder bearing unit 3: stud tube
5: stern tube bush 7: propeller shaft
11: welding block 13: bearing body
15: slip layer 23: shaft support surface
23a: slope 30: fitting portion
31: fitting step 33: fitting groove
40: fastening portion 41: fastening hole
43: fastening end 45: through hole

Claims

A welding block welded to one side of the inner circumferential surface of the stern tube;
A bearing body having a fitting portion formed between the upper surface of the welding block and fastened through the mutual fastening portion in a state seated on the upper surface of the welding block, the bearing body having an axial support surface; And
A slip layer formed on the entire cross section of the shaft support surface;
Shoulder bearing unit for propeller shaft comprising a.

The method of claim 1,
The fitting portion
A fitting end protruding upward in an axial center portion of the welding block; And
A propeller shaft shoulder bearing unit comprising a fitting groove formed on a lower surface of the bearing body corresponding to the fitting end.

The method of claim 2,
The fitting portion
The height h of the fitting end and the depth d of the fitting groove are the same, and the length (l) of the fitting end and the width (w) of the fitting groove are the same.

The method of claim 1,
The fastening portion
Fastening holes formed before and after the axial direction of the welding block;
A propeller shaft shoulder bearing unit comprising a fastening end having protruding holes respectively protruding from the lower end before and after the axial direction of the bearing body.

The method of claim 1,
The shaft support surface
A shoulder bearing unit for a propeller shaft, which is formed in a planar cross section and whose front and rear ends are formed in an inclined surface.

The method according to any one of claims 1 to 5,
The slip layer is
A shoulder bearing unit for propeller shaft formed in a panel form and bonded to the shaft support surface.