JP3183964U - Ship split bearings - Google Patents

Abstract

A marine split type bearing that can reduce sliding resistance with respect to a propulsion shaft and further improve fuel efficiency.
A bearing that supports a propulsion shaft S of a ship, is provided along a cylindrical shell 10 and an inner peripheral surface of the shell 10, and is at least a reinforcing member 21 and is fixed to the inner peripheral surface. A plurality of bearing members 20 constituted by a sliding member 22 on which the propulsion shaft S slides are provided. Further, the bearing member 20 provided in the substantially upper half portion U of the shell 10 is formed as a first bearing member 20a with the sliding member 22 made of a rubber material, and the bearing member 20 provided in the substantially lower half portion L is The sliding member 22 is made of a fluororesin material to form a second bearing member 20b.
[Selection] Figure 1

Description

  The present invention relates to a split bearing that supports a propulsion shaft of a ship.

  In recent years, a bearing for supporting a propulsion shaft of a ship is formed by a plurality of bearing members separately formed from a cylindrical metal shell and divided into a plurality of parts, instead of being integrally formed with a conventional metal shell. A configured one has been invented (see, for example, Patent Document 1). In this split bearing, for example, since only a highly worn bearing member can be replaced, there is an advantage that repair is easy.

  Each of the plurality of bearing members constituting the split bearing is composed of a reinforcing material (synthetic resin impregnated fiber board) and a synthetic rubber sliding material fixed to the inner peripheral surface thereof. The material slides on a rotating propeller shaft.

Japanese Patent No. 3503024

  The inventor tried to further improve the split bearing described above. In other words, although the rubber-made sliding material that slides on the propulsion shaft has characteristics such as excellent elasticity and durability, it is considered that the sliding resistance against the propulsion shaft is not necessarily small. I thought there was room.

  This invention is based on such an idea, and makes it a subject to provide the split bearing which can improve the fuel consumption of a ship more.

  This will be described with reference to FIGS. A marine split type bearing 1 according to claim 1 is a bearing that supports a propulsion shaft S of a marine vessel, and is provided along a cylindrical shell 10 and an inner peripheral surface of the shell 10, and at least a reinforcing material. 21 and a plurality of bearing members 20 that are fixed to the inner peripheral surface thereof and configured by a sliding member 22 on which the propulsion shaft S slides.

  Then, the bearing member 20 provided in the substantially upper half U of the shell 10 is formed as a first bearing member 20a with the sliding member 22 made of a rubber material, and the bearing member 20 provided in the substantially lower half L is The sliding member 22 is made of a fluororesin material to form a second bearing member 20b.

  A marine split type bearing 1 according to claim 2 is a bearing that supports a propulsion shaft S of a marine vessel, is provided along a cylindrical shell 10 and an inner peripheral surface of the shell 10, and at least a reinforcing material. 21 and a plurality of bearing members 20 that are fixed to the inner peripheral surface thereof and configured by a sliding member 22 on which the propulsion shaft S slides.

  Then, the bearing member 20 provided in the substantially upper half U of the shell 10 is formed as a first bearing member 20a with the sliding member 22 made of a rubber material, and the bearing member 20 provided in the substantially lower half L is The sliding member 22 is made of a fluororesin material to form a second bearing member 20b.

  Further, stoppers 30 and 30 a for preventing the bearing member 20 from moving in the circumferential direction are provided between the substantially upper half U and the substantially lower half L of the shell 10.

  The marine split type bearing 1 according to the first aspect of the present invention includes a first bearing member 20a in which the bearing member 20 provided in the substantially upper half U of the shell 10 is composed of a sliding material 22 made of a rubber material. Since the bearing member 20 provided in the substantially lower half L is the second bearing member 20b having the sliding member 22 made of a fluororesin material, the fuel efficiency of the ship can be reduced.

  That is, since the sliding material 22 of the second bearing member 20b provided in the substantially lower half L of the shell 10 is made of a fluororesin material having a smaller axial torque than the rubber material so far, the sliding material 22 slides on the propulsion shaft S. Resistance can be reduced. As a result, the propulsive force can be increased, and the fuel efficiency of the ship can be improved.

  The split type bearing 1 for a ship according to claim 2 can improve the fuel efficiency of the ship, similarly to the device according to claim 1. Moreover, since the stoppers 30 and 30a are provided between the substantially upper half U and the substantially lower half L of the shell 10, it is possible to prevent the plurality of bearing members 20 from moving in the circumferential direction unnecessarily. .

1 is a front view showing a first embodiment of a split bearing for a ship according to the present invention. FIG. 2 is a cross-sectional view taken along line XX in FIG. 1 (main-part cross-sectional view). It is a front view which shows the one aspect | mode of the bearing member which comprises the split type bearing shown in FIG. It is a front view which shows the other aspect of the bearing member which comprises the split type bearing shown in FIG. It is a front view which shows 2nd embodiment of the split type bearing for ships which concerns on this invention. FIG. 6 is a cross-sectional view taken along line YY of FIG. 5 (main-part cross-sectional view). In 2nd embodiment of FIG. 5, it is a front view which shows the modification of a stopper. It is a graph which shows the difference in the axial torque of the split type bearing which concerns on this invention, and the conventional split type bearing.

  A first embodiment of a split bearing 1 according to the present invention is shown in FIGS. The split bearing 1 is a bearing that supports a propulsion shaft S of a ship, and includes a shell 10 and a plurality of bearing members 20.

  The shell 10 is made of a cylindrical metal (gun metal). Each bearing member 20 includes a reinforcing material 21 and a sliding material 22. The reinforcing member 21 is attached in a state where the outer peripheral surface thereof is in contact with the inner peripheral surface of the shell 10, and the outer peripheral surface of the sliding member 22 is fixed to the reinforcing member 21. In addition, the reinforcing material 21 is comprised with a synthetic resin impregnation fiber board (cloth-containing phenol).

  Further, the plurality of bearing members 20 provided in the substantially upper half U of the shell 10 is formed as a first bearing member 20a with the sliding member 22 made of a rubber material (synthetic rubber). Further, the plurality of bearing members 20 provided in the substantially lower half L of the shell 10 is formed as a second bearing member 20b with the sliding member 22 made of a fluororesin material.

  In addition, the bearing member 20 in the embodiment can be configured by only the reinforcing material 21 and the sliding material 22 as shown in FIG. 3, or between the reinforcing material 21 and the sliding material 22 as shown in FIG. A buffer material 23 may be provided. By providing the buffer material 23, the sliding resistance with respect to the propulsion shaft S can be further reduced, and the fuel consumption can be further improved.

  The marine split type bearing 1 according to the present embodiment includes a plurality of bearing members 20 provided in a substantially lower half L of the shell 10, a sliding member 22 made of a fluororesin material, and a first bearing member 20 a Therefore, the sliding resistance of the propulsion shaft S can be reduced. As a result, the propulsive force can be increased, and the fuel efficiency of the ship can be improved.

  Since the sliding resistance with respect to the propulsion shaft S acts on the substantially lower half L of the shell 10 more than the substantially upper half U, the sliding member 22 of the bearing member 20 located in the substantially lower half L. The effect (reduction in fuel consumption) due to the fact that is made of a fluororesin material becomes more remarkable.

  A second embodiment of the split type bearing 1 for a ship according to the present invention is shown in FIGS. Similarly to the first embodiment, the split bearing 1 also has a bearing member 20 provided in the substantially upper half U of the shell 10 and a sliding member 22 made of a rubber material to form a first bearing member 20a. Further, the bearing member 20 provided in the substantially lower half L is configured as a second bearing member 20b with the sliding member 22 made of a fluororesin material. Thereby, the fuel consumption of a ship can be improved.

  In the second embodiment, the stopper 30 is fixed with a screw 31 between the substantially upper half U and the substantially lower half L of the shell 10. The stoppers 30 are provided at two positions on the left and right of the intermediate height portion of the shell 10, and their upper end surfaces are in pressure contact with the lower surface of the reinforcing member 21 of the first bearing member 20 a, and their lower end surfaces are reinforcing the second bearing member 20 b. The upper surface of the material 21 is pressed.

  By providing the stopper 30, the plurality of bearing members 20 can be prevented from moving in the circumferential direction of the shell 10. As a result, smoother rotation of the propulsion shaft S can be promoted, and the fuel efficiency of the ship can be further improved.

  In addition, the bearing member 20 in this embodiment can also be comprised only with the reinforcing material 21 and the sliding material 22 similarly to 1st embodiment (refer FIG. 3), or the reinforcement material 21 and the sliding material 22 of FIG. A cushioning material 23 may be provided between them (see FIG. 4).

  As shown in FIG. 7, the stopper 30 in FIG. 5 can be made of a synthetic resin-impregnated fiber board and a reinforcing material 21 alone having no sliding material can be used as the stopper 30 a.

  The inventor conducted an experiment to confirm the performance of the split bearing 1 according to the present invention. In this experiment, the split type bearing 1 provided with the first bearing member 20a and the second bearing member 20b according to the present invention and the conventional split type bearing in which the sliding material of the bearing member is entirely composed of a rubber material are used. The shaft torque (force required to rotate the shaft) of the propulsion shaft S supported by them was measured. For the sake of drawing, the wavelength is drawn enlarged.

  The result is shown in FIG. From this experiment, it was found that the axial torque of the conventional split type bearing is 10 kg · m, whereas the axial torque of the split type bearing 1 according to the present invention is only 3 kg · m. From this, it was confirmed that the split bearing according to the present invention has a smaller sliding resistance with respect to the propulsion shaft S than the split bearing according to the conventional example. Therefore, by using the split bearing 1 according to the present invention, the fuel efficiency of the ship can be improved.

1 split bearing 10 shell 20 bearing member 20a first bearing member 20b second bearing member 21 reinforcing material 22 sliding material 23 cushioning material 30 stopper 30a stopper 31 screw L substantially lower half U substantially upper half S propulsion shaft

Claims (2)

  A split bearing for supporting a propulsion shaft (S) of a ship, which is provided along a cylindrical shell (10), an inner peripheral surface of the shell, and at least a reinforcing material (21) and an inner periphery thereof A plurality of bearing members (20) that are fixed to a surface and are configured by sliding members (22) on which the propulsion shaft slides, and the bearing members are provided in a substantially upper half (U) of the shell The sliding member is made of a rubber material to form a first bearing member (20a), and the bearing member provided in the substantially lower half (L) of the shell is made of a fluororesin material. The split bearing is characterized in that it is a second bearing member (20b).   A split bearing for supporting a propulsion shaft (S) of a ship, which is provided along a cylindrical shell (10), an inner peripheral surface of the shell, and at least a reinforcing material (21) and an inner periphery thereof A plurality of bearing members (20) that are fixed to a surface and are configured by sliding members (22) on which the propulsion shaft slides, and the bearing members are provided in a substantially upper half (U) of the shell The sliding member is made of a rubber material to form a first bearing member (20a), and the bearing member provided in the substantially lower half (L) of the shell is made of a fluororesin material. The second bearing member (20b) is provided with a stopper (30, 30a) for preventing circumferential movement of the bearing member between the substantially upper half and the substantially lower half of the shell. Split bearings characterized by

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