JPH0529999Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a thrust bearing for a counter-rotating marine propeller device driven by inner and outer shafts.

(Prior Art) A conventional example of the contra-rotating propeller device for ships is described in Utility Model Application No. 110127/1985. The stern propeller 1 is rotated, and the inner shaft 3
The structure is such that the outer shaft 4 is reversely rotated through an elastic joint 5 and a planetary gear-type reversing device 6 provided in The type reversing device 6 is a sun gear 6a.
, large and small planetary gears 6b, 6c, and ring rear 6
d, etc., and the above-mentioned inner,
The outer shafts 3 and 4 are supported by thrust bearings, and the thrust generated by the stern propeller 1 is received by the thrust bearing 8a, and the thrust generated by the stern propeller 2 is received by the thrust bearing 8a.
The thrust generated in the above is transmitted to the inner shaft 4 by the thrust bearing 8b and received by the thrust bearing 8a, thereby protecting the reversing device 6, that is, its ring gear 6d.

Another conventional example is explained in Japanese Patent Application No. 57-206065, which includes an inner shaft 3 for driving the stern propeller 1, an outer shaft 4 for driving the bow propeller 2, and a medium-speed diesel main engine 9'. A gear 7a rotated by the output shaft 9a, a hydraulic pump 7b driven by the gear 7a, a hydraulic motor 7c operated by the hydraulic pump 7b, and a sun gear driven by the output shaft 9a. 7d, a plurality of planetary gears 7e, which are meshed and disposed on the sun gear 7d, are connected to the hydraulic motor 7c, and output to the inner shaft 3;
The ring gear 7f meshes with the outer shaft 4 and outputs the output to the outer shaft 4, and the structure includes a planetary gear type counter-rotating device 7 having deceleration and reverse rotation functions.

(Problems with the Prior Art) The conventional example shown in FIG. Thrust bearing 8a inside the main engine via shaft 3
The thrust generated by the bow propeller 2 is transmitted to the inner shaft 3 via the outer shaft 4 and the thrust bearing 8b, and is received by the thrust bearing 8a, so that the thrust does not affect the planetary gear type reversing device 6. However, it is technically extremely difficult to assemble the thrust bearing 8b between the inner shaft 3 and the outer shaft 4, and the assembly accuracy of the thrust bearing 8b is likely to vary, resulting in reliability problems. Also, by interposing the thrust bearing 8b, the inner and outer shafts 3, 4
There are problems such as making it difficult to incorporate and arrange.

Furthermore, the conventional example shown in FIG. 6 is a contra-rotating propeller device for a ship when the medium-speed diesel main engine 9' is used as the drive source, and in this case, it is necessary to reverse rotation while decelerating. As shown in the figure, since a planetary gear type counter-rotating device 7 with a complicated mechanism is used, it is necessary to prevent the thrust generated by the stern propeller 1 and the bow propeller 2 from affecting the counter-rotating device 7 side. Particular attention should be paid to
As shown in the figure, no countermeasures have been taken and this has become a technical issue.

(Purpose of the invention, means for solving problems) This invention is an invention to deal with the above-mentioned problems in the conventional contra-rotating propeller device for ships, and it is a flange fixed to the flange; an outer bearing shaft interposed and connected to the outer shaft in correspondence with the flange; It is characterized by a structure that includes a pair of bearing fittings with thrust pads that can be attached and detached, and the outer shaft for bearings is attached to the outer shaft in correspondence with the flange provided on the outer circumferential surface of the inner shaft between the reversing device and the propeller. At the same time, a thrust bearing can be installed between the inner and outer shafts between the reversing device and the propeller by removably attaching a pair of bearing fittings with thrust pads to the inner peripheral side of the outer side of the bearing. In addition to eliminating the influence of thrust on the reversing device, it also facilitates the installation and maintenance of the thrust bearing, increases assembly accuracy, and significantly improves thrust bearing performance and reliability. It is an object of the present invention to provide a thrust bearing for a counter-rotating propeller device for a ship, which can be easily assembled and arranged and eliminates the above-mentioned problems.

(Embodiment of the invention) An embodiment of the invention is shown in Figs. 1 to 4. In Fig. 1, 11 is a stern propeller;
12 is the bow propeller, 13 is the stern propeller 1
1 is a main inner shaft to which is directly connected, and 14 is a main outer shaft to which the bow propeller 12 is directly connected, and the main inner shaft 13 has a first intermediate inner shaft 13a and a second intermediate inner shaft 1.
3b are removably connected by a shaft coupling 20 to form the inner shafts 13, 13a, 13b, and the main outer shaft 1
The inner shafts 14, 14a, 14b are constructed by removably connecting hollow outer shafts 14a and 14b, which are split into two halves, with a thrust bearing 30 interposed therebetween, using a shaft coupling bolt or the like.

Further, the second inner shaft 13, 13a, 13b
Intermediate inner shaft 13b and the outer shafts 14, 14a, 14b
The hollow outer shaft 14b is drivingly connected to the output shaft 19a of the medium-speed diesel main engine 19 by an elastic joint 15 and a planetary gear type counter-rotating device 17. As shown in FIG. 2, an input sun gear 17a connected to an elastic joint 15
and a plurality of planetary gears 17 meshed with the sun gear 17a and connected to and output from the second intermediate inner shaft 13b.
b, and a ring gear 17c meshed with the planetary gear 17b and connected to the hollow outer shaft 14b.The power of the medium-speed diesel main engine 19' is transmitted to the sun gear 17a via the elastic joint 15, and the ring gear 17c meshes with the planetary gear 17b and is connected to the hollow outer shaft 14b. The inner shafts 13, 13a, 13b are rotated at a reduced speed in the direction of the arrow, and the planetary gear 1
7b, and the outer shafts 14, 14 via the ring gear 17c.
a and 14b are decelerated and reversely rotated in the direction of the arrow, and are configured to have deceleration and reverse rotation functions. In addition, 17d in the figure is a thrust bearing provided in the ring gear 17c.

Furthermore, to explain the thrust bearing 30 in detail, as shown in FIGS. ,13b,
That is, a flange 31 is fixed to the outer peripheral surface of the first intermediate inner shaft 13a, and the hollow outer shaft 14 is made to correspond to the flange 31.
A bearing outer shaft 32 is interposed between a and 14b and removably connected by means such as a shaft coupling bolt, and two rings formed in the shape of a ring plate are provided on the inner periphery of the bearing outer shaft 32. The bearing fittings 33, 33 of the cracks are removably attached with a plurality of reamer bolts/nuts 35, 36, and the bearing fittings 33, 33 are attached to the flange 3.
The thrust pads 34 are arranged opposite to each other with a predetermined gap on both sides of the thrust pad 1, and a thrust pad 34 is attached to the opposing surface. In addition, in the figure, 32a and 33a are the reamer bolt holes of the reamer bolt 35, and 32b is the hollow outer shaft 1.
Bolt hole for connecting bolt with 4a, 14b, 3
7 is the packing, 40a is the hull, and 40b
is the rear bulkhead of the engine room.

(Function) The embodiment of the present invention has the above-described configuration, and when the medium-speed diesel main engine 19 is used as the drive source, the engine is rotated in a relatively reverse direction as it decelerates.
Since it is necessary to rotate the outer shaft, a planetary gear type counter-rotating device 17 having the above-mentioned configuration is used to rotate the inner shafts 13, 13a, 13b and the outer shafts 14, 14.
A, 14b are rotated at a deceleration rate, and the stern side propeller 11 and the stern side propeller 12 can be driven to rotate in a relatively reverse direction while decelerating.
(It has the same function as the conventional example shown in FIG. 6.) Furthermore, the thrust bearing 30 is provided between the inner and outer shafts between the counter-rotating device 17 and the stern and bow propellers 11 and 12. The thrust generated by the bow propeller 12 is transmitted through the main inner shaft 1.
4. The outer shaft for bearing 3 is further connected via the hollow outer shaft 14a.
2, bearing fittings 33, thrust pad 34, collar 31
The thrust is transmitted to the first intermediate bearing 13a of the inner shaft via the stern propeller 11, and is further disposed in the medium-speed diesel main engine 19 via the second intermediate inner shaft 13b and the output shaft 19a. Since the thrust is received by a thrust bearing (not shown), the thrust has almost no effect on the planetary gear type counter-rotating device 17.

Further, as shown in FIG. 4, the thrust bearing 30 has an outer shaft 32 for a bearing fitted in a flange 31 portion of the first intermediate inner shaft 13a of the inner shafts 13, 13a, 13b. From both sides of the bearing fittings 33,
33, and the bearing fittings 33, 33 can be tightened and fixed to the inner circumferential side of the outer bearing shaft 32 with a plurality of reamer bolts 35, packings 37, and nuts 36, and the bearing fittings 33, 33 can be fixed to the collar 31. The bearing outer shaft 32 can be interposed between the hollow outer shafts 14a and 14b and connected by a shaft coupling bolt or the like and assembled. In addition, bearing fittings 3
Maintenance of the thrust pad 34 attached to 3 can be easily performed by removing the hollow shafts 14a and 14b, which are split into two, and pulling out the reamer bolt 35.

Furthermore, the separation and connection of the thrust bearing 30 and the assembly of the inner and outer shafts are facilitated. Inner shaft 1
3b, can be separated and combined into outer shafts 14, 14a, 14
b can also be separated and combined into the main outer shaft 14 and the hollow outer shafts 14a and 14b, making it easy to incorporate and arrange the inner and outer shafts.

(Effects of the invention) As mentioned above, the present invention has a flange 31 fixed to the outer peripheral surface of the inner shaft between the reversing device 17 and the propellers 11 and 12.
, an outer bearing shaft 32 interposed and connected to the outer shaft in correspondence with the flange 31, and a removable shaft 32 attached to the inner peripheral side of the outer shaft 32 and opposite to both sides of the flange 31. Bearing fitting 3 with a pair of thrust pads 34
3 and 33, it is possible to incorporate a thrust bearing between the inner and outer shafts between the reversing device and the propeller, eliminating the influence of thrust on the reversing device, and eliminating the influence of thrust on the reversing device. , the installation and maintenance of the thrust bearing between the outer shafts is easy, the assembly accuracy is increased, and the thrust bearing performance and reliability are significantly improved.Furthermore, the interposed connection of the thrust bearing allows the inner This has the advantage of facilitating the installation and arrangement of the outer shaft.
In this invention, the outer shaft for bearings is integrally interposed and connected to the outer shaft, so the power transmission strength of the outer shaft is increased, and a pair of bearing fittings are removably attached to the outer shaft for bearings. Therefore, it is possible to adjust the mounting position of the bearing fitting with respect to the flange, and the assembly accuracy is improved.

[Brief explanation of drawings]

Fig. 1 is an overall vertical cross-sectional view showing one embodiment of the present invention, Fig. 2 is a cross-sectional view of the - portion of Fig. 1, and Fig. 3 is a cross-sectional view of the - portion of Fig.
The figures are an enlarged sectional view of the part shown in Fig. 1, Fig. 4 is an exploded perspective view of the thrust bearing, Fig. 5 is a vertical sectional view showing a conventional example, Fig. 6A is a mechanism diagram showing another conventional example, FIG. 6B is a sectional view of the - portion of FIG. 6A. 11, 12... Propeller, 13, 13a, 13
b...Inner shaft, 14, 14a, 14b...Outer shaft, 1
7... Reversing device, 30... Thrust bearing, 31...
...Brim, 32...Outer shaft for bearing, 33...Bearing fitting,
34...Thrust pad.

Claims (1)

[Scope of utility model registration request] A collar fixed to the outer circumferential surface of the inner shaft between the reversing device and the propeller, an outer bearing shaft interposed and connected to the outer shaft corresponding to the collar, and attached to the inner circumferential side of the outer shaft for the bearing. 1. A thrust bearing for a counter-rotating propeller device for a ship, characterized in that the thrust bearing is provided with a pair of bearing fittings with thrust pads that are attached and detached and are installed oppositely on both sides of the flange.