JPH0530558Y2 - - 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 transmission device 6 arranged in the outer shaft 4, and the bow propeller 2 is reversely rotated by the outer shaft 4. The planetary gear type reversing transmission device 6 is composed of a sun gear 6a, large and small planetary gears 6b, 6c, a ring gear 6d, etc.
The thrust generated by the stern propeller 1 is received by a thrust bearing 8a in the low-speed diesel main engine 9, and the thrust generated by the bow propeller 2 is received by a thrust bearing 8b provided between the inner and outer shafts 3 and 4. It is transmitted to the inner shaft 4 and received by the thrust bearing 8a, so that the reverse transmission device 6, that is, its ring gear 6d is protected from the thrust.

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;
It has a structure in which a planetary gear type counter-rotating transmission device 7 having deceleration and reverse rotation functions is provided.

(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 thrust bearing 8b, and is received by the thrust bearing 8a, so that the thrust does not affect the planetary gear reverse transmission 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 variations tend to occur in the assembly accuracy of the thrust bearing 8b, 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 the planetary gear type counter-rotating transmission device 7 with a complicated mechanism is used, on the counter-rotating transmission device 7 side,
Particular care must be taken to prevent the thrust generated by the stern propeller 1 and the bow propeller 2 from having an effect, but as shown in the figure, no countermeasures have been taken to prevent this, 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 is A pair of flanges fixed at intervals on the surface, and a pair of attachable and detachable thrust pads interposed and connected to the outer shaft corresponding to each of the flanges and provided opposite to the sides of the flanges. It is characterized by a structure comprising a bearing fitting, and a bearing outer shaft interposed and connected between the two bearing fittings, and a pair of flanges are provided at intervals on the outer circumferential surface of the inner shaft between the reversing transmission device and the propeller. a pair of bearing fittings with thrust pads which can be attached and removed, which are interposed and connected to the outer shaft in correspondence with the two flanges, and which are installed opposite to the side surfaces of the two flanges, and which are interposed and connected between the two bearing metal fittings; By providing a bearing outer shaft and configuring it as a thrust bearing, it eliminates the influence of thrust on the reversal transmission device, and also facilitates the installation and maintenance of the thrust bearing between the inner and outer shafts, improving assembly accuracy. To provide a thrust bearing for a counter-rotating propeller device for a ship, which significantly improves the performance and reliability of the thrust bearing by increasing the torque, and also makes it easy to assemble and arrange the inner and outer shafts, thereby solving 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 hollow outer shafts 14a and 14b, which are split into two parts, are removably connected with a shaft coupling bolt or the like through a thrust bearing 30, thereby forming the outer shafts 14, 14a, and 14b.

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

Furthermore, to explain the thrust bearing 30 in detail, as shown in FIGS. ,13b,
That is, a pair of flanges 31a and 31b are fixedly installed on the outer circumferential surface of the first intermediate inner shaft 13a at an interval, and both flanges 3
1a, 31b, bearing fittings 32a, 32b formed in a ring plate shape and a bearing outer shaft 33 are interposed between the hollow outer shafts 14a, 14b, and a plurality of bearing fittings 32a, 32b formed in a ring plate shape and a bearing outer shaft 33 are provided at intervals in the circumferential direction. shaft coupling bolt 35a,
They are serially tightened and connected by a tightening nut 35b, and the bearing fittings 32a, 32b are fitted onto the side surfaces of the flanges 31a, 31b from the outside, and are opposed to each other at a predetermined interval. Thrust pads 34, 34 are attached to the structure.

In the figure, 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 rotationally drive the outer shaft, the planetary gear counter-rotating transmission device 17 having the above configuration is used.
using the inner shaft 13, 13a, 13b and the outer shaft 1.
4, 14a, 14b are decelerated and rotated,
It has a mechanism of one input shaft and two output shafts that are driven in relatively reverse rotation, and the stern propeller 11 and the stern propeller 12 can be driven in relative reverse rotation as the speed decreases. (It has the same function as the conventional example shown in FIG. 6) Furthermore, the thrust bearing 30 is connected to the counter-rotating transmission device 17 and the stern and bow propellers 11 and 1.
2, it is interposed and arranged between the inner and outer shafts,
The thrust generated by the bow propeller 12 is further transmitted to the bearing fitting 3 via the main inner shaft 14 and the hollow outer shaft 14a.
2a, 32b, bearing outer shaft 33, thrust pad 3
4. The thrust is transmitted to the first intermediate bearing 13a of the inner shaft via the brim 31a, 31b, and is generated by the stern propeller 11, as well as the second intermediate inner shaft 13b.
Through the output shaft 19a, the medium-speed diesel main engine 19
Since the thrust is received by a thrust bearing (not shown) disposed inside, the thrust has almost no influence on the planetary gear counter-rotating transmission device 17.

Further, as shown in FIG. 4, the thrust bearing 30 includes a pair of flanges 31 provided at intervals on the first intermediate inner shaft 13a of the inner shafts 13, 13a, 13b.
Bearing fittings 32a, 32b are arranged on both sides of the bearing fittings 32a, 31b, and a bearing outer shaft 33 is interposed between the bearing fittings 32a, 32b, so that the outer circumferential side surface of the bearing fittings 32a, 31b is the hollow outer shaft of the outer shaft 14, 14a, 14b. 14b and 14
The hollow outer shaft 14b, the hollow outer shaft 14b,
Bow side bearing fitting 32b, first intermediate inner shaft 13a,
This can be easily done by sequentially assembling and connecting the parts divided into the stern side bearing fitting 32a, the bearing outer shaft 33, the hollow outer shaft 14a, etc., and also by dividing the hollow outer shafts 14a and 14b into two Due to the configuration and the connection configuration of the first intermediate inner shaft 13a, the shaft coupling bolt 35a can be removed and the bearing fittings 32a, 3
Thrust pads 34, 34 attached to 2b
Maintenance management such as inspection and repair can be easily performed.

Furthermore, the separation and connection of the thrust bearing 30 facilitates the assembly of the inner and outer shafts, and the inner shafts 13, 13a, 13b are connected to the main inner shaft 13, the first intermediate inner shaft 13a, and the second intermediate shaft. It can be separated and connected to the inner shaft 13b, and the outer shafts 14, 14a, 14b can also be separated into the main outer shaft 14 and the hollow outer shafts 14a and 14b.
can be combined, making installation easier.

(Effect of the invention) As described above, the present invention includes a pair of flanges 31a and 31b fixedly spaced apart from each other on the outer peripheral surface of the inner shaft between the reversing transmission device 17 and the propellers 11 and 12, and the two flanges 3.
1a, 31b, a pair of attachable/detachable thrust pads 34 are interposed and connected to the outer shaft, and are provided opposite to the sides of both the flanges 31a, 31b.
2a, 32b, and the bearing outer shaft 33 interposed and connected between the two bearing fittings, it is easy to incorporate the thrust bearing between the inner and outer shafts between the reversing transmission device and the propeller. The thrust bearing of the present invention is a simple structure consisting of a pair of collars provided on the inner shaft, a pair of bearing fittings, and the outer shaft of the bearing. With the outer shaft of the bearing, the bearing fittings are simplified, the assembly accuracy is improved, and the fittings are easy to install and remove, making it easy to install and install the fittings between the inner and outer shafts, and to maintain and manage them. As a result, assembly accuracy has been increased, and thrust bearing performance and reliability have been significantly improved. Further, by interposing and connecting the thrust bearing, the inner and outer shafts can be easily assembled and arranged.

[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 transmission device, 30... Thrust bearing, 3
1a, 31b... collar, 32a, 32b... bearing metal fitting, 33... bearing outer shaft, 34... thrust pad, 35a... shaft coupling bolt.

Claims (1)

[Scope of utility model registration request] A pair of flanges fixed at intervals on the outer peripheral surface of the inner shaft between the reversing transmission device and the propeller, and a pair of flanges interposed and connected to the outer shaft corresponding to each of the flanges, and facing the sides of both flanges. 1. A thrust bearing for a counter-rotating propeller device for a ship, comprising: a pair of bearing fittings with thrust pads that can be attached and detached; and a bearing outer shaft interposed and connected between the two bearing fittings.