JPH046627B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a marine variable pitch propeller device suitable for use in a marine propulsion device or the like.

[Conventional technology]

In recent years, variable pitch propellers have been widely used as main propulsion devices for ships, but in general, variable pitch propellers and regular fixed pitch propellers can only obtain thrust in the propeller axial direction, that is, thrust in the longitudinal direction of the ship.

Conventionally, when turning a ship, it is necessary to adjust the rudder angle or use the thrust of auxiliary propulsion devices such as side thrusters installed at appropriate locations on the ship to achieve the desired movement. is giving to

In particular, when using an auxiliary propulsion device such as a side thruster, by adjusting its thrust, the hull can be moved or rotated in any direction, improving maneuverability.

[Problem that the invention seeks to solve]

However, in order to equip the hull with an auxiliary propulsion device such as the above-mentioned side thruster, it is necessary to provide a drive mechanism for the auxiliary propulsion device inside the hull, which requires space for the equipment.
There is a problem that the weight of the hull increases.

In particular, special vessels such as deep-sea submersible vessels require a lighter hull and more efficient use of space in order to be equipped with various functions such as work manipulators. Differently, it is necessary to control the movement or rotation of the ship not only in the horizontal plane but also in the vertical plane, so when this control is performed by an auxiliary propulsion device such as a side thruster other than the main propulsion device as in the past. , the hull must be equipped with more auxiliary propulsors than a normal ship, which increases the weight of the ship and makes it difficult to make effective use of the narrow space inside the ship.

In view of these circumstances, the present invention makes it possible to adjust the thrust for not only forward and backward movement, but also to turn the ship vertically and horizontally while moving forward or backward, without using an auxiliary propulsion device. An object of the present invention is to provide a variable pitch propeller device for a marine vessel, which improves the maneuverability of the ship, reduces the weight of the ship, and makes effective use of space inside the ship.

[Means for solving problems]

For this reason, the marine variable pitch propeller device of the present invention has a guide tube that overlaps the propeller shaft in the propeller boss and is fixed to the hull side, and a spherical bearing that is provided so as to be able to slide back and forth while being guided by the guide tube. a first hydraulic cylinder mounted on the hull side having a tubular piston rod coupled to the spherical bearing and capable of sliding back and forth while being guided by the guide tube; It is equipped with a tiltable tilting plate and a link roller that rotates and slides by engaging with a ring-shaped guide groove along the outer periphery of the tilting plate. In order to change the angle of rotation, a swinging arm is provided that connects the base end shaft of the propeller blade rotatably supported by the propeller boss to the link portion of the link roller, and also controls the longitudinal and horizontal tilting of the inclined plate. The present invention is characterized in that a second hydraulic cylinder and a third hydraulic cylinder, respectively, are mounted between the inclined plate and the tubular piston rod.

[Effect]

In the marine variable pitch propeller device of the present invention described above, the first hydraulic cylinder adjusts and controls the amount of displacement of the inclined plate in the longitudinal direction, and the second and third hydraulic cylinders control the longitudinal and horizontal tilting of the inclined plate. Since the pitch angle of the propeller blades can be changed periodically during one rotation of the propeller shaft through adjustment control, the direction and magnitude of thrust can be freely adjusted.

〔Example〕

Hereinafter, a marine variable pitch propeller device as an embodiment of the present invention will be explained with reference to the drawings.
Figure 1 is a side sectional view, and Figure 2 is the − of Figure 1.
Fig. 3 is a perspective view showing the base end of the propeller blade, Fig. 4 a to e are for explaining its function, and Fig. 4 a schematically shows the reference position of the inclined plate. FIG. 4B is a sectional view schematically showing the state of forward and backward movement of the inclined plate, FIG. 4C is a sectional view schematically showing the state of forward and backward tilting of the inclined plate,
FIG. 4 d is a side view schematically showing the left-right tilting state of the inclined plate, and FIG. 4 e is a side view schematically showing the state in which longitudinal movement, longitudinal tilting, and left-right tilting are superimposed on the inclined plate. .

As shown in FIG. 1, a propeller boss 6 is rotatably attached to a case 2 attached to a support 1 on the hull side via a bearing 8 and a seal 9. As shown in FIG. The propeller boss 6 is integrally connected to one end of the propeller shaft 5 within the propeller boss 6 so as to rotate in synchronization with the propeller shaft 5, and is connected to the outer periphery of the propeller boss 6 via a bearing seal portion 22. Along with a plurality of propeller blades 19 that are movably attached (pitch angle variable), the propeller shaft 5
It is designed to be rotationally driven by a drive motor 4 connected to the other end.

On the other hand, inside the propeller boss 6, a guide tube 3 is superimposed on the propeller shaft 5 via a bearing 7, and the base end of the guide tube 3 is connected to the case 2 on the hull side.

Further, the guide tube 3 is provided with a spherical bearing 12 so as to be able to slide on its outer peripheral surface in the longitudinal direction of the hull (the right direction in FIG. 1 is defined as the front). is connected to a tubular piston rod 11 that can slide in the longitudinal direction of the hull while being guided by a guide tube 3, and the tubular piston rod 11 is driven using a tubular first hydraulic cylinder 10 attached to a case 2 on the hull side. By doing so, the spherical bearing 12 is moved back and forth along the guide tube 3.

Further, an inclined plate 13 is attached to the spherical bearing 12 via a rocking piece 12a so that it can tilt in all directions along the spherical surface 12b, and this inclined plate 13b can also move back and forth together with the spherical bearing 12. It's becoming like that.

Then, as shown in FIGS. 1 and 2, the inclined plate 13
Piston rods 18a and 18b are swingably attached to the upper and left front surfaces of the piston rods via connecting fittings 15, respectively, and second and third hydraulic cylinders 17a and 1 drive these piston rods 18a and 18b.
7b is swingably supported by cylinder support portions 16a and 16b protruding from the outer peripheral surface of the tubular piston rod 11, and these second and third hydraulic cylinders 17a and 17b support the tilt plate 13. The forward and backward tilting and the left and right tilting are performed by the spherical bearing 1 via the piston rods 18a and 18b, respectively.
It is carried out around 2.

Note that each of the hydraulic cylinders 10, 17a, 17b is connected to an oil supply/drainage pipe (not shown), and is also equipped with a displacement meter (not shown) for detecting the amount of displacement of the piston rods 11, 18a, 18b. Cylinder 10, 17a, 1
By controlling the amount of oil supplied to the piston rod 7b by a control device (not shown), the piston rod 10,
The amount of displacement of 18a and 18b can be controlled to a set value.

By the way, as shown in FIGS. 1 and 3, a base shaft 20 is connected to a propeller boss 6 at the base end of the propeller blade 19.
The link roller 2 is connected to the link roller 2 via a swinging arm 20' that is formed to project inward and is attached to this base end shaft 20 by a universal joint 20a.
1 link section 21a is connected.

This link roller 21 is connected to the inclined plate 13.
It is designed to be able to rotate and slide by engaging with a ring-shaped guide groove 14 formed along the outer periphery of the ring.

Therefore, the piston rods 11, 18a, 1
8b is driven and the inclined plate 13 moves or tilts and is displaced, this displacement is transmitted to the propeller blade 19 via the link roller 21, the link portion 21a and the swinging arm 20', and according to the amount of displacement of the inclined plate 13, The pitch angle of the propeller blades 19 can be changed.

The range of change in the pitch angle of the propeller blades 19 may be adjusted by the amount of displacement of the piston rods 11, 18a, 18b, or by the arm length of the swing arm 20'.

Since the variable pitch propeller device for ships of the present invention is constructed as described above, by adjusting and controlling the amount of displacement of the tubular piston rod 11 of the first hydraulic cylinder 10, the longitudinal movement of the inclined plate 13 along the guide tube 3 is controlled. On the other hand, by adjusting and controlling the displacement amounts of the piston rods 18a and 18b of the second and third hydraulic cylinders 17a and 17b, the longitudinal and horizontal tilting of the inclined plate 13 is controlled.

Then, the amount of displacement of the inclined plate 13 is
Link roller 2 that engages with the guide groove 14 on the outer periphery
1. It is transmitted to each propeller blade 19 via the link portion 21a and the swing arm 20'.

Therefore, while the propeller boss 6 and the propeller blades 19 are rotationally driven by the drive motor 4,
According to the amount of displacement of the inclined plate 13, the pitch angle of the propeller blades 19 during one revolution of the propeller shaft 5 is changed periodically, so that the direction and magnitude of the thrust can be adjusted.

That is, the pitch angle α of the propeller blade 19 is regulated by the link roller 21 and the guide groove 14 at the blade end, and the amount of change in the pitch angle α is determined by the change in pitch angle α of the inclined plate 13. Proportional to the amount of displacement.

Further, as shown in FIG. 3, when the rotation direction of the propeller blade 19 is counterclockwise, the propeller blade 1
When the propeller blade 9 is parallel to the rotational direction, that is, at the reference position S, the generated thrust is zero, but when the propeller blade 19 rotates by the pitch angle α in the positive or negative direction with respect to the rotational direction, the propeller blade 19 generates a forward or A backward thrust is generated. Therefore, the prop shaft 5
If the pitch angle α of each propeller blade 19 is changed simultaneously or periodically according to the rotation angle of It is possible to obtain thrust in a combination of these three directions.

For example, as shown in FIG. 4a, the inclined plate 13
is at the reference position S, the pitch angle of the propeller blades 19 is 0 at any position, and no thrust is generated.

When the piston rod 11 is pushed backward from such a reference position S by the first hydraulic cylinder 10, the inclined plate 13 slides backward along the guide tube 3 together with the spherical bearing 12, as shown in FIG. 4b. The propeller blades 19 are displaced and the pitch angle of the propeller blades 19 has the same positive value at any position, so a thrust force is generated in the forward direction of the ship.

Conversely, from the reference position S, the first hydraulic cylinder 1
When the piston rod 11 is pulled forward by 0, the inclined plate 13 is slid forward and the pitch angle of the propeller blades 19 becomes an equal negative value at any position, so a thrust force is generated in the backward direction of the ship. do.

On the other hand, from the reference position S, the second hydraulic cylinder 1
When the piston rod 18a is pushed out by 7a,
As shown in FIG. 4c, the inclined plate 13 tilts back and forth along the spherical bearing 12 so that its upper side is located at the rear, and the pitch angle of the propeller blades 19 changes from left to right during one revolution of the propeller shaft 5. 0 at the position, positive and negative values at the upper and lower positions, respectively.

Therefore, the propeller blade 19 generates a thrust in the forward direction at the upper side and a thrust in the backward direction at the lower side, so that the hull rotates downward.

Note that by performing the operation opposite to the above, the hull is rotated upward.

Furthermore, when the piston rod 18b is retracted from the reference position S by the third hydraulic cylinder 17b, the inclined plate 13 is tilted left and right along the spherical bearing 12 so that its left side is located at the rear, as shown in FIG. 4d. However, during one revolution of the propeller shaft 5, the pitch angle of the propeller blades 19 is 0 in the vertical position, and positive and negative values in the left and right positions, respectively.

Therefore, the propeller blade 19 generates a thrust in the forward direction on the left side and a thrust in the backward direction on the right side, so that the hull turns to the right.

Note that by performing the operation opposite to that described above, the hull turns to the right.

In the above, the movements of the inclined plate 13 in the three directions of forward and backward movement, forward and backward tilting, and left and right tilting have been explained independently. By appropriately combining these, it is possible to generate thrust in any direction.

For example, from the reference position S, the first hydraulic cylinder 10 pushes out the piston rod 11, and the second hydraulic cylinder 17a pushes out the piston rod 11.
8a, and the third hydraulic cylinder 1
When the piston rod 18b is pulled in by 7b,
The inclined plate 13 moves back and forth and tilts, as shown in FIG. 4e, and the hull moves forward in the lower right direction.

In operation as described above, piston rod 1
By adjusting the displacement amount of 1, 18a, 18b and appropriately setting the pitch angle of the propeller blade 19,
It is also possible to adjust the magnitude of the thrust generated.

As described above, in the marine variable pitch propeller device of the present invention, the direction and magnitude of the thrust by the propeller blades 19 can be freely adjusted, so there is no need to use an auxiliary propulsion device such as a side thruster as in the conventional case. The maneuverability of the ship is improved.

Furthermore, since there is no need to install a drive mechanism for the auxiliary propulsion device inside the hull, the hull can be made lighter and the interior space can be used more effectively.

〔Effect of the invention〕

As detailed above, according to the variable pitch propeller device for ships of the present invention, there is a guide tube that overlaps the propeller shaft in the propeller boss and is fixed to the hull side, and can slide back and forth while being guided by the guide tube. a first hydraulic cylinder mounted on the hull side and having a tubular piston rod coupled to the spherical bearing and capable of sliding back and forth while being guided by the guide tube; and the spherical bearing. It is equipped with an inclined plate that can tilt in all directions along the spherical surface of the inclined plate, and a link roller that can rotate and slide by engaging with a ring-shaped guide groove along the outer periphery of the inclined plate. In order to change the pitch of the propeller blades in accordance with It has a simple configuration in which a second hydraulic cylinder and a third hydraulic cylinder are installed between the inclined plate and the tubular piston rod to tilt the plate back and forth and left and right, respectively. Since the direction and magnitude of the thrust can be freely adjusted, the maneuverability of the ship can be greatly improved without using auxiliary propulsion devices such as conventional side thrusters.

Furthermore, since there is no need to install a drive mechanism for the auxiliary propulsion device inside the ship, there is an advantage that the weight of the ship can be reduced and the space inside the ship can be used effectively.

[Brief explanation of drawings]

The figures show a marine variable pitch propeller device as an embodiment of the present invention, in which Fig. 1 is a side sectional view thereof, Fig. 2 is a sectional view taken along the - arrow in Fig. 1, and Fig. 3 is a propeller blade thereof. FIG. 4 is a perspective view showing the base end of the
Figure 4a is a schematic cross-sectional view showing the standard position of the inclined plate, Figure 4b is a cross-sectional view schematically showing the forward and backward movement of the inclined plate, and Figure 4c is the forward and backward tilting of the inclined plate. A sectional view schematically showing the state, FIG. 4d is a side view schematically showing the left and right tilting state of the inclined plate,
FIG. 4e is a side view schematically showing a state in which the inclined plate is subjected to back-and-forth movement, back-and-forth tilting, and left-right tilting. 1... Support, 2... Case, 3... Guide tube, 4... Drive motor, 5... Propeller shaft, 6...
...Propeller boss, 7, 8...Bearing, 9...Seal, 10...First hydraulic cylinder, 11...Tubular piston rod, 12...Spherical bearing, 12a...
...Rocking piece, 12b...Spherical surface of spherical bearing, 13...
Inclined plate, 14... Guide groove, 15... Connection fittings,
16a, 16b... cylinder support part, 17a...
Second hydraulic cylinder, 17b... Third hydraulic cylinder, 18a, 18b... Piston rod, 19
...propeller blade, 20...base end shaft, 20'...swing arm, 20a...universal joint,
21...Link roller, 21a...Link portion, 2
2...Bearing seal portion, S...Reference position.

Claims (1)

[Claims] 1. A guide tube superimposed on the propeller shaft in the propeller boss and fixed to the hull side, a spherical bearing provided so as to be able to slide back and forth while being guided by the guide tube, and the guide tube coupled to the spherical bearing. a first hydraulic cylinder mounted on the hull side and having a tubular piston rod that can slide back and forth while being guided by the cylinder; an inclined plate that can tilt in all directions along the spherical surface of the spherical bearing; It is equipped with a link roller that can rotate and slide by engaging with a ring-shaped guide groove along the outer periphery, and rotates on the propeller boss in order to change the pitch of the propeller blades according to the forward and backward movement and tilting of the inclined plate. A swinging arm is provided that connects the base end axis of the propeller blade, which is supported by the propeller blade, to the link portion of the link roller, and a second hydraulic cylinder and a second hydraulic cylinder are provided for respectively tilting the tilting plate back and forth and tilting the tilting plate left and right. A marine variable pitch propeller device, characterized in that three hydraulic cylinders are all mounted between the inclined plate and the tubular piston rod.