JPH0411439B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a contra-rotating marine propeller device having a front propeller and a rear propeller that rotate in opposite directions, and particularly relates to a contra-rotating marine propeller equipped with a generator. Regarding equipment.

[Conventional technology]

Generally speaking, in order to save energy on ships,
Electric power is obtained by driving a generator using the rotational torque of the propeller's rotating shaft.

In the case of a normal single-shaft ship, as shown in Figure 4, a gear is formed around the outer periphery of a flywheel 2' attached to a rotating shaft 3' behind the main engine 1'. The step-up gear 6' is adapted to mesh with the step-up gear 6'. The rotating shaft 6'a of the step-up gear 6' is connected to the rotating shaft 10'a of the generator 10' via an elastic joint 8' and a speed increasing device 9'.

The generator 10' is disposed on the side of the rotating shaft 3' facing the main engine 1' so as not to interfere with the main engine 1'.

Therefore, in a single-shaft ship equipped with such a generator 10', the main engine 1' navigates while driving the propeller 4' to rotate through the rotating shaft 3'. The rotational torque is transmitted to the speed increasing device 9' via the gear on the outer periphery of the flywheel 2', the step-up gear 6', and the elastic joint 8', and after being increased in speed by the speed increasing device 9', the rotational torque is transferred to the generator 10'. The power is transmitted to the rotating shaft 10'a of the generator 10', and power generation is performed in the generator 10'.

By the way, generally, a counter-rotating marine propeller device is constructed as shown in FIGS.
A rear propeller 16' and a front propeller 16' are provided on the inner shaft 11' and the outer shaft 12', respectively. A propeller 13' is attached.

In order to reverse the inner shaft 11' and the outer shaft 12' with respect to each other, the outer shaft 12' is connected to the reversing device 7' and the elastic joint 8'.
It is connected to the inner shaft 11' via. and,
Generally, a planetary gear mechanism or the like is used as the reversing device 7'.

Therefore, during navigation, the rear propeller 16'
The front propeller is directly rotatably driven by the rotating shaft of the main engine 1' through the inner shaft 11', while the front propeller has an outer shaft 11'.
Rotation in the direction opposite to the rotational direction of the inner shaft 11' is transmitted through the inner shaft 11' and the reversing device 7'.

When a generator is attached to a marine counter-rotating propeller device as described above, a reversing device 7' and an elastic joint 8' are arranged behind the flywheel 2', so the generator is installed as shown in FIG. Like a normal single-shaft ship,
When the rotational torque is extracted from the flywheel 2',
The reversing device 7' and the generator interfere with each other, making it difficult to arrange the generator.

Conventionally, when a generator is attached to a marine counter-rotating propeller device, a flywheel 17' is attached to the end of the crankshaft 1'b on the front end surface of the main engine 1', as shown in Fig. 5. Means for constructing a generator from a shaft power generation rotor 15' attached to the outer periphery of the flywheel 17' and a shaft power generation stator 14' disposed close to the rotor 15' so as to cover the rotor 15' from the outer periphery. Alternatively, as shown in Fig. 6, a generator 10' is connected to a camshaft driving gear 5' built in the main engine 1' via a step gear 6'' and a speed increaser 9'. 10' is disposed on the side of the main engine 1'.

Therefore, in a marine counter-rotating propeller device with a generator as shown in FIG.
As the flywheel 17' rotates, the stator 14' and the rotor 15' generate electricity. 1' is transmitted to the generator 10' via the camshaft driving gear 5', the step-up gear 6', and the speed increasing device 9'.
The power is transmitted to generate electricity.

[Problem that the invention seeks to solve]

However, in the conventional marine counter-rotating propeller device with a generator as described above, in the case of the former conventional example, the generator is disposed at the front end of the main engine 1',
In the case of the latter conventional example, a step-up gear 6', a generator 10', etc. are arranged on the side of the main engine 1', and a complicated reversing device 7' is also arranged in the engine room. However, arranging various equipment within the engine room is difficult, and the space within the engine room may become so small that it may be necessary to expand the engine room.

The present invention aims to solve these problems, and provides a generator that allows the generator to be easily and compactly installed in the engine room, thereby making effective use of the space within the engine room. The object of the present invention is to provide a counter-rotating marine propeller device.

[Means for solving problems]

Therefore, the contra-rotating marine propeller device with a generator of the present invention has an inner shaft that is rotationally driven by the rotating shaft of the main engine, and an outer shaft that is arranged concentrically with the inner shaft and can be rotated. In a marine counter-rotating propeller device each having a rear propeller and a front propeller, the rotating shaft of the main engine accelerates and rotates through a first gear mechanism and decelerates through a second gear mechanism. A high-speed rotating flexible shaft capable of transmitting a driving force in a rotational direction opposite to that of the inner shaft to the outer shaft is disposed parallel to the inner shaft and the outer shaft, and is connected to the flexible shaft. It is characterized by the fact that it is equipped with a generator.

[Effect]

In the marine counter-rotating propeller device with a generator of the present invention described above, the outer shaft is rotated in the opposite direction from the rotating shaft of the main engine through the first gear mechanism, the deflection shaft, and the second gear mechanism. Torque is transmitted,
Rotationally driven in the opposite direction to the inner shaft.

Furthermore, since the flexible shaft is of a high-speed rotation type, a generator is connected to the flexible shaft, and efficient power generation is performed in the generator by the high-speed rotation of the flexible shaft.

[Example] Hereinafter, a counter-rotating marine propeller device with a generator as an example of the present invention will be explained with reference to the drawings. Fig. 1 is a longitudinal cross-sectional view thereof, and Fig. 2 is a cross-section taken in the direction of - arrow in Fig. 1. FIG. 3 is a composite diagram showing a cross section taken along the line aa and a cross section taken along the line b-b in FIG. 1 for the left half and the right half, respectively.

As shown in FIG. 1, an inner shaft 5 is connected to the rotating shaft 1a of the main engine 1, and an outer shaft 6 is connected to the inner shaft 5.
A rear propeller 11 and a front propeller 10 are attached to the rear ends of the inner shaft 5 and outer shaft 6, respectively.

As shown in FIGS. 1 to 3, a first gear 7a is provided on the outer periphery of the inner shaft 5, and a bearing 7 is provided concentrically with the inner shaft 5.
This first gear 7a is connected to the rotating shaft 1a of the main engine 1 via two split hollow shafts 4 and an elastic joint 3, and rotates in the same direction as the inner shaft 5. It's becoming like that.

Further, a pair of idler gears 7c are disposed to mesh with the first gear 7a, respectively, and mesh with a first pinion 7d supported by a bearing 7h, and these first gears 7a, the idler A first gear mechanism 7A is configured by the gear 7c and the first pinion 7d.

Further, the front end of the outer shaft 6 is supported by a bearing 7h and a thrust bearing, and a second gear 7b is provided at the front end of the outer shaft 6.

Then, the pair of second pinions 7e mesh with the second gear 7b, and the first pinion 7e meshes with the second gear 7b.
The second pinion 7e and the second gear 7b constitute a second gear mechanism 7B.

On the other hand, the first and second pinions 7d and 7
e is connected by a flexible shaft 7f that passes through these pinions 7d and 7e and is arranged parallel to the inner shaft 5 and the outer shaft 6, and is coupled at the front and rear ends of the flexible shaft 7f, respectively. , the flexible shaft 7f connects to the rotating shaft 1 of the main engine 1 via the first gear mechanism 7A, the hollow shaft 4 split in two, and the elastic joint 3.
The flexible shaft 7f is rotated at high speed by the flexible shaft 7f, and the high speed rotation of the flexible shaft 7f is decelerated via the second gear mechanism 7B, and a driving force in the opposite rotational direction to the inner shaft 5 is transmitted to the outer shaft 6.

Note that the idler gear 7c and the first pinion 7
d, the second pinion 7e and the deflection shaft 7f are
A pair of symmetrical pairs are provided above the first and second gears 7a and 7b, as well as a deflection shaft 7f and a first and second gear mechanism 7A and 7B.
The reversing device 7 is configured by the above.

By the way, as mentioned above, a generator 9 is connected to the rear end of the flexible shaft 7f which is rotationally driven at high speed via a speed increaser 8, and this generator 9 is a reversing device that requires a large space in the engine room. It is placed at a position further back than the

Note that the reference numeral 2 in FIG. 1 indicates a flywheel attached to the rotating shaft 1a, and 7g indicates a coaxial bearing.

Since the marine counter-rotating propeller device with a generator as an embodiment of the present invention is configured as described above, the rotational torque of the rotating shaft 1a of the main engine 1 is directly transmitted to the inner shaft 5 and While the propeller 11 is rotationally driven, the rotation is transmitted to the first gear 7a via the elastic joint 3 and the hollow shaft 4 split in two.

Then, as shown in FIG. 3, the rotation direction of the first gear 7a is converted to the opposite direction via the idler gear 7c, the first pinion 7d, the deflection shaft 7f, and the second pinion 7e. The signal is transmitted to the second gear 7b.

As a result, the outer shaft 6 is driven to rotate in the opposite direction to the inner shaft 5, and the front propeller 10 and the rear propeller 11 rotate in opposite directions.

At this time, the deflection shaft 7f is connected to the first gear mechanism 7.
A, the rotational speed of the rotating shaft 1a of the main engine 1 is increased to approximately five times the rotational speed of the rotating shaft 1a, and the rotation of the flexible shaft 7f, which is driven to rotate at such high speed, is further increased by the speed increasing device 8. The signal is then transmitted to the generator 9, where the generator 9 generates electricity.

As described above, according to this embodiment, the generator 9
is a flexible shaft 7 that constitutes the reversing device 7 and rotates at high speed.
In addition to being efficiently driven using the engine f, the generator is located behind the reversing device 7, which has plenty of space in the engine room, so the generator can be easily and compactly installed in the engine room without expanding the engine room. Can be attached to.

Therefore, the space in the engine room can be used effectively, and the conventional step-up gear for increasing speed is no longer necessary, and the cost required for the device can be significantly reduced.

In addition, in this contra-rotating propeller device, the deflection axis 7f parallel to the inner shaft 5 and the outer shaft 6 is adopted in the reversing mechanism, so its deflection characteristics increase technical reliability, and such deflection The reliability of the operation of the generator 9 attached using the shaft 7f is also increased.

〔Effect of the invention〕

As described in detail above, according to the marine counter-rotating propeller device with a generator of the present invention, the inner shaft is rotationally driven by the rotating shaft of the main engine, and the inner shaft is arranged concentrically with the inner shaft and rotates in reverse direction. In a contra-rotating marine propeller device, which is provided with a rear propeller and a front propeller, respectively, on a rotary outer shaft, the rotary shaft of the main engine speeds up and is rotationally driven via a first gear mechanism, and a second A high-speed rotating flexible shaft capable of transmitting a driving force in the opposite rotational direction to the inner shaft by being reduced in speed through a gear mechanism is disposed parallel to the inner shaft and the outer shaft. It has a simple configuration with a generator connected to a flexible shaft, and by utilizing the high-speed rotation of the highly reliable flexible shaft, the generator can be easily and compactly installed in the engine room, making it efficient and reliable. This allows for effective use of space in the engine room, eliminates the need for step-up gears, and significantly reduces the cost of the equipment while ensuring sufficient reliability.

[Brief explanation of drawings]

1 to 3 show a counter-rotating marine propeller device with a generator as an embodiment of the present invention, FIG. 1 is a longitudinal sectional view thereof, and FIG. 2 is a sectional view taken in the direction indicated by the arrow - , FIG. 3 shows cross-sections taken along arrows a-a and b-- in FIG. 1 for the left half and right half, respectively.
Fig. 4 is a longitudinal sectional view showing the installation state of a generator in a normal single-shaft ship, and Fig. 5 is a composite view showing a cross section in the direction of the b arrow. FIG. 6 is a schematic longitudinal sectional view showing another conventional marine counter-rotating propeller device with a generator. 1...Main engine, 1a...Rotating shaft of the main engine, 2...
...Flywheel, 3...Elastic joint, 4...Half-split hollow shaft, 5...Inner shaft, 6...Outer shaft, 7...Reversing device, 7A...First gear mechanism, 7B...First 2
gear mechanism, 7a...first gear, 7b...second gear
gear, 7c... idler gear, 7d... first
pinion, 7e... second pinion, 7f...
Deflection shaft, 7g...Inner shaft bearing, 7h...Bearing, 7
i... Thrust bearing, 8... Speed increaser, 9... Generator, 10... Front propeller, 11... Rear propeller.

Claims (1)

[Claims] 1. A counter-rotating marine propeller, which has a rear propeller and a front propeller on an inner shaft that is rotationally driven by the rotating shaft of the main engine, and an outer shaft that is arranged concentrically with the inner shaft and can be rotated. In the apparatus, the rotating shaft of the main engine is sped up and rotationally driven via a first gear mechanism, and decelerated via a second gear mechanism to drive the outer shaft in a rotational direction opposite to that of the inner shaft. A high-speed rotating flexible shaft capable of transmitting force is arranged parallel to the inner and outer shafts,
A counter-rotating marine propeller device with a generator, characterized in that a generator is attached to the same deflection shaft.