JPH0530559Y2 - - 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., and the thrust generated by the stern propeller 1 is transmitted to the low-speed diesel main engine. The thrust generated by the bow propeller 2 is transmitted to the inner shaft 4 by a thrust bearing 8b provided between the inner and outer shafts 3 and 4, and is received by the thrust bearing 8a. Thus, the reversing transmission device 6, that is, its ring gear 6d is protected against 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;
The structure includes a ring gear 7f that meshes with the outer shaft 4 and outputs the output to the outer shaft 4, and is provided with a planetary gear type counter-rotating transmission 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 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 to the surface at a distance, and a pair of flanges interposed and connected to the outer shaft in correspondence with the inner surfaces of the flanges, and a pair of flanges installed opposite to the inner surfaces of the flanges and detachable. It is characterized by a structure equipped with a bearing fitting with thrust pads on both sides, and a pair of flanges are provided on the outer circumferential surface of the inner shaft between the reversing transmission device and the propeller, and interposed on the outer shaft in correspondence with the inner surfaces of both flanges. By providing a bearing fitting with attachable and detachable double-sided thrust pads that are connected to each other and arranged between both inner surfaces of the two flanges to form a thrust bearing, the influence of thrust on the reversing transmission device can be eliminated, and the inner , the installation and maintenance of the thrust bearing between the outer shafts is facilitated, the assembly accuracy is increased, and the performance and reliability of the thrust bearing are significantly improved. An object of the present invention is to provide a thrust bearing for a counter-rotating propeller device for a ship, which solves the 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 the bow side propeller 12 is directly connected, and 14 is a main outer shaft to which the bow side propeller 12 is directly connected.
b are removably connected by a shaft coupling 20 to form the inner shafts 13, 13a, 13b, and the main outer shaft 14
The hollow outer shafts 14a and 14b, which are split into two, are removably connected with a shaft coupling bolt or the like through the interposition of 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 decelerated and reversely rotated in the direction of the arrow, and are configured to have deceleration and reverse rotation functions. Note that 17d in the figure 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. 13a, 13
b, that is, a pair of flanges 31a and 31b are fixedly installed at intervals on the outer circumferential surface of the first intermediate inner shaft 13a, and the hollow outer shafts 14a and 14b are aligned between the inner surfaces of the flanges 31a and 31b. A two-split bearing fitting 32 formed in the shape of a ring plate is interposed between the bearing fittings 32 and the bearing fittings 32 are connected by tightening in series with a plurality of shaft coupling bolts 35a and tightening nuts 35b at intervals in the circumferential direction.
The bearing fitting 32 is interposed between both inner surfaces of the flanges 31a and 31b, and is arranged opposite to each other with a small distance therebetween, and is configured as a double-sided thrust pad-equipped bearing fitting 32 with thrust pads 33, 33 attached to both sides thereof. ing.

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, which are driven in relatively reverse rotation, so that the stern propeller 11 and the bow propeller 12 can be driven in relative reverse rotation with deceleration. (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 outer shaft 14 and the hollow outer shaft 14a.
2. The thrust generated by the stern propeller 11 is transmitted to the first intermediate bearing 13a of the inner shaft via the thrust pad 33 and the collars 31a and 31b, and is further transmitted to the medium-speed diesel engine via the second intermediate inner shaft 13b and the output shaft 19a. Since the thrust is received by a thrust bearing (not shown) disposed in the main engine 19, 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 has a bearing fitting 32 between both inner surfaces of a pair of flanges 31a, 31b provided on the first intermediate inner shaft 13a of the inner shafts 13, 13a, 13b. At the same time, the outer peripheral side surface of the bearing fitting 32 is connected to the outer shaft 14, 14a,
14b can be interposed and arranged between the hollow outer shafts 14b and 14a, and can be assembled by tightening and connecting them with a plurality of shaft coupling bolts 35a and tightening nuts 35b, and can be assembled between the hollow outer shafts 14b and 14a. can be easily assembled and separated by connecting with bolts, and the hollow outer shafts 14a, 14
b. Due to the bisected structure of the bearing fitting 32, maintenance such as inspection and repair of the thrust pads 33, 33 attached to the bearing fitting 32 can be easily performed by removing the shaft joint bolt 35a.

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.
A removable double-sided thrust pad 33 is interposed and connected to the outer shaft in correspondence with the inner surfaces of the flanges 31a and 31b, and is disposed between the inner surfaces of the flanges 31a and 31b.
Since the structure is equipped with a bearing fitting 32, a thrust bearing can be easily installed between the inner and outer shafts between the reversing transmission device and the propeller, and the influence of thrust on the reversing transmission device is eliminated. In addition, the thrust bearing of the present invention has an extremely simple structure consisting of a pair of flange provided on the inner shaft and a bearing fitting with double-sided thrust pads, and has an interposed installation arrangement between the inner and outer shafts. Maintenance management is easy, assembly accuracy is improved, and thrust bearing performance and reliability are significantly improved. Furthermore, by interposing and connecting the thrust bearing, the inner and outer shafts can be easily installed and arranged, and since one bearing fitting is installed and connected to the outer shaft, the strength of the outer shaft is ensured. It has the effect of

[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, 32... bearing metal fitting, 33...
...Thrust pad, 35a...Shaft joint bolt.

Claims (1)

[Scope of utility model registration request] A pair of flanges fixed at a distance from each other on the outer circumferential surface of the inner shaft between the reversing transmission device and the propeller; A thrust bearing for a counter-rotating propeller device for a ship, characterized by comprising a bearing fitting with attachable and detachable double-sided thrust pads arranged between inner surfaces.