JP2542607Y2 - Swing drive for swiveling thrusters - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for turning a thruster for ships, and more particularly to a turning drive device for an electric thruster.

[0002]

2. Description of the Related Art A conventional swiveling thruster T uses a power of an input shaft 51 via a clutch 52 and a bevel gear mechanism 53 as shown in a side sectional view of FIG. 10 and a plan view of FIG. The power is transmitted to the vertical output shaft 54 and the propeller shaft 5
5 to drive the propeller P.

The turning thruster T has a turning function for exhibiting a function as a rudder for steering. This turning function is performed by driving a hydraulic pump 57 by an electric motor 56 provided on the platform F and supplying hydraulic oil from the hydraulic pump 57 to the hydraulic motor 59 via the valve unit 58, so that the hydraulic motor 59 The rotary pinion 60 is driven to rotate a rotary gear 61 meshed with the rotary pinion 60, and an oil cooler 62 for cooling pressurized oil is provided.
Is also provided. Accordingly, the strut S, the propeller P, and the like formed integrally with the turning gear 61 are turned, so that the hull can be steered with the thrust of the turning type thruster T directed in any direction.

On the other hand, in the revolving thruster T having the revolving function as described above, the torque for maintaining the direction of the thrust is maintained while the strut S and the strut S are rotated and functioned as a rudder. It is necessary to keep.

In view of the above, the conventional swivel thruster T is configured to be held at a predetermined angle together with the swivel drive by a drive device using both electricity and hydraulic pressure. In this case, as an advantage of the electric / hydraulic drive, there is an advantage that a large torque can be obtained by using the hydraulic pressure even with the small electric motor 56, and the response is good.

[0006]

However, the electric / hydraulic swing drive as described above has a very low efficiency, for example, 80% of a hydraulic pump and 80% of a hydraulic motor.
%, And the loss in the pipeline is 15%, the efficiency of the entire driving device is 0.8 × 0.8 × 0.85 = about 55%. Therefore, the turning thruster has been a very inefficient propulsion device that causes a large loss in the turning drive device.

When the above-mentioned hydraulic system is employed, the hydraulic pump 57, the valve unit 58 for controlling the hydraulic oil thereof, and the swiveling thruster T are rotated by the hydraulic oil from the valve unit 58. Motor 59, a pipe 63 provided therebetween, and an oil cooler 62 for cooling the pressurized oil are required. It must be placed on T's platform F. Therefore, the platform F becomes complicated, and the platform F becomes large due to the arrangement thereof, so that the weight of the swiveling thruster T is inevitably increased. Was inconvenient.

Further, when there are many devices and their auxiliary devices, troubles such as oil leakage often occur between them, and cooling water or the like for cooling by using oil is used. Is also required, resulting in a more complicated structure.

As described above, the conventional swivel-type thruster requires a lot of equipment or auxiliary equipment.
The turning thruster has been an extremely expensive propulsion device because the manufacturing cost or the cost required for maintenance or the like increases.

On the other hand, at present, since the electric / hydraulic circuit is used in the control portion for turning drive, the seafarers involved in maintenance and inspection work need to have advanced knowledge of both electric and hydraulic pressure. In addition, even the service staff for on-site adjustment required advanced knowledge of both electricity and hydraulics. Therefore, it was difficult to secure personnel, and the cost for that was also enormous.

In recent years, robots and the like using electric servos have been developed with the development of electric servo technology and the like, and electric control technologies such as inverter control for the purpose have been dramatically advanced. In addition, the production cost of such electric control technology has been significantly reduced due to the development of electronic technology and the like. Therefore, even in the technical field where the electric / hydraulic type has been conventionally used, there is also a field where the hydraulic type is not required by adopting the electric type.

In view of the above-mentioned problems, the present invention provides an electric drive unit in which the turning drive unit is disposed on a platform and is configured to be integrally detachable together with the turning thruster. It is an object of the present invention to provide a turning drive device for a turning type thruster in which the efficiency of the turning is improved and the trouble is reduced.

[0013]

In order to achieve the above object, a turning drive device for a turning type thruster according to claim 1 is provided.
A turning gear for turning the turning thruster, a turning pinion meshed with the turning gear, and turning drive means for driving the turning pinion, wherein the turning drive means is arranged on a platform and integrated with the turning thruster The main thruster is equipped with a pivoting thruster that is configured to be removable .
In swing drive system of the ship, as well as constituting the rotation drive means by an electric servo motor or inverter control electric motor, provided with a control device for controlling the turning / stop and position holding of the electric servo motor or inverter control electric motors, the With the torque in the turning direction of the turning thruster
The above-mentioned electric servomotor or inverter-controlled electric motor
A motor with a regenerative braking function to regenerate the generated electricity
A control unit is provided and connected to the control device .

[0014]

According to the turning drive device for a turning type thruster according to the first aspect, when the electric servomotor or the inverter control electric motor is driven by the rotation command from the control device, the turning is performed by the electric servomotor or the inverter control electric motor. The pinion is driven, and the revolving thruster is revolved through the revolving gear meshed with the revolving pinion. The turning / stopping and the position holding of the electric servomotor or the inverter-controlled electric motor are always controlled by the control device. Thus, everything from the signal of the control device to the turning drive of the turning thruster is driven or controlled by the electric system.

In addition, the electric servomotor or the inverter-controlled electric motor is arranged on the platform of the swiveling thruster so as to be integrally detachable, so that it can be integrally detached from the hull.

Further, by the regenerative braking function of the motor control unit, when the electric motor is turned by the turning torque from the turning thruster to generate electricity, it can be returned to the ship.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. The mechanism of the swiveling thruster is the same as the conventional one shown in FIG. 10, but in the following embodiments, each component will be described based on a schematic side view.

FIG. 1 is a side view of a first embodiment showing the basic structure of the present invention. As shown in FIG.
Is provided with a strut S which turns integrally with a propeller P and is supported by a bearing Sa so as to be freely turnable. A turning gear 1 is provided above the strut S, and turning pinions 2 are provided on the left and right in the drawing so as to mesh with the turning gear 1. A shaft 2a for rotating the turning pinion 2 is connected to an electric motor 3 serving as an electric driving means. When the electric motor 3 is driven, the strut of the turning thruster T is driven through the turning pinion 2 and the turning gear 1. S is rotated. In addition, 4
Is a shaft coupling.

The electric motor 3 is connected to a control device 6 via a motor control unit 5, and the control device 6 is connected to a control device 7 provided in a ship's cabin. The motor control unit 5 is supplied with power for driving the electric motor 3 from the hull H side. The control device 6 receives a turning command of the steering handle 7a provided in the steering device 7, issues a turning command to the electric motor 3, receives feedback of the turning angle, compares the command with the actual turning angle, If they match, control for stopping the electric motor 3 is performed, and the control unit uses a microcomputer or the like.

The first embodiment is a swivel device having a basic configuration of the present invention.
Since this mechanism relies only on the electric motor 3 for holding the position, the electric motor 3 may be a servomotor or the cage type motor may be controlled by a vector inverter. Although the motor control units 5 are provided for the electric motors 3 in the drawings, a configuration in which one unit controls two electric motors 3 may be employed. The control device may be formed integrally with the control unit 5 and is not particularly limited.

According to the first embodiment configured as described above, when a turning command is issued from the control handle 7a of the control device 7, a turning command is transmitted from the control device 6 to the motor control unit 5. Then, the electric motor 3 is driven by the motor control unit 5, and the strut S of the revolving thruster T is rotated via the revolving pinion 2 and the revolving gear 1 by the rotation of the electric motor 3, so that the propeller P is steered. A thrust is generated in the direction specified by the handle 7a. In general, the turning pinion 2 has a rotation speed of 40 to 50 rpm.
And the revolving gear 1 is rotated at about 3 rpm.

Next, a second embodiment will be described in detail with reference to the side view shown in FIG. In the second embodiment, a brake device 8 is provided in the first embodiment. As shown in the drawing, the electric motor 3 and the shaft coupling 4 having the structure shown in the first embodiment are used.
And a brake device 8 is provided between the two. The brake device 8 uses a known mechanical brake that can be detached and attached, and is connected to the control device 6 via a brake control unit 9 so as to be synchronized with the drive state of the electric motor 3. In the case of the second embodiment, since the mechanical brake device 8 is provided separately from the electric motor 3, the electric motor 3 may be constituted by a servo motor or a cage type motor and an inverter control. The electric motor 3 may not be able to secure the stop torque during the operation. Further, the electric motor 3 may be a commercially available motor equipped with an electromagnetic brake on the upper part of the motor.

According to the second embodiment constructed as described above, when a turning command is issued from the control handle 7a of the control device 7, a turning command is transmitted from the control device 6 to the motor control unit 5, and a brake is applied. A command to release the brake device 8 is transmitted to the control unit 9, the brake device 8 is released by these signals, the electric motor 3 is driven by the motor control unit 5, and the rotation of the turning pinion 2 The strut S of the revolving thruster T is rotated via the revolving gear 1. Then, when the electric motor 3 stops, a signal is sent from the control device 6 to the brake control unit 9, the brake device 8 is engaged, and the position of the revolving thruster T is maintained. As a result, the orbiting thruster T generates a thrust in the direction instructed by the propeller P by the steering handle 7a.

Next, a third embodiment will be described in detail with reference to the side view shown in FIG. In the third embodiment, a position detector 10 such as a pulse generator is provided between the electric motor 3 and the shaft coupling 4.
And is connected to the control device 6 via a signal conversion unit 11 such as a pulse counter unit that converts a signal output from the position detector 10 so as to match the control device 6. Then, the rotation direction and the rotation angle of the output shaft of the electric motor 3 are detected by the position detector 10,
The signal transmitted to the control device 6 via the signal conversion unit 11 allows the control device 6 to control the orbiting thruster T in the direction indicated by the steering handle 7a. Since the turning command from the steering handle 7a in the third embodiment is transmitted in the same manner as in the first embodiment, the details are omitted.

When the electric motor 3 itself has a built-in detector for detecting the rotation angle of the magnetic pole of the motor, as in the case of a vector inverter control of a servo motor or a cage type motor, the position detector 10 is replaced with an electric motor. A detector built in the motor 3 may be used.

The position detector 10 has an outer shape,
Depending on the condition such as the type, it may be mounted on the upper part of the electric motor 3 or on the electric motor shaft via a transmission mechanism such as a gear instead of between the electric motor 3 and the shaft coupling 4.

Next, a fourth embodiment will be described in detail with reference to the side view shown in FIG. In the fourth embodiment, a planetary gear mechanism 12 is provided between the electric motor 3 and the shaft coupling 4 in place of the position detector 10 of the third embodiment. It is configured to reduce the rotation speed of the output shaft.

According to the fourth embodiment, the turning pinion 2
Since the planetary gear mechanism 12 is used as a means for rotating the motor at 40 to 50 rpm, even if the electric motor 3 of 60 Hz / 4 pole (1800 rpm) widely used for industrial use is used, the speed can be easily reduced. Therefore, the electric motor 3 can be freely selected to some extent. In addition, this makes the electric motor 3 compact and reduces the price. Note that this fourth
In this embodiment, the turning command from the steering handle 7a is transmitted in the same manner as in the above-described first embodiment, so that the details are omitted.

Next, a fifth embodiment will be described in detail with reference to the side view shown in FIG. The fifth embodiment is different from the embodiment having the planetary gear mechanism 12 described in the fourth embodiment in that an electric motor 3 suitable for each signal is provided based on signals from various sensors provided in each part of the hull H. The swing speed control is performed, and the fire pump operation sensor 13
Signals from the main engine speed transmitter 14, the boat speed sensor 15, and the blade angle transmitter 16 are input to the control device 6.

According to the fifth embodiment constructed as described above, when the firefighting pump is operated, it is necessary to turn quickly because the firefighting activities are performed, so the turning speed is increased. Also, when the rotation speed of the main engine is high, the rudder works well, so that the turning speed is reduced. Conversely, when the rotation speed of the main engine is low, the rudder is not very useful, so the turning speed is increased. Further, when the boat speed is high, the rudder works well, so that the turning speed is lowered. Conversely, when the boat speed is low, the rudder is not very useful, so the turning speed is increased.

In the case of a variable pitch propeller, when the blade angle is large, the rudder works well.
On the other hand, when the wing angle is small, the rudder is not very useful, and the turning speed is increased.

The turning command from the steering handle 7a in the fifth embodiment is transmitted in the same manner as in the first embodiment described above, so that the details are omitted. In addition, the various sensors are not limited to the above four types, and a signal from another sensor may be input to the control device 6.

Incidentally, the first to fifth embodiments described above all have a structure in which two turning pinions 2 are disposed so as to face the turning gear 1 as shown in the gear arrangement diagram of FIG.
This is arranged at a diagonal position to cancel the gear reaction force acting on the turning pinion 2.
The number of the turning pinions 2 is limited to the tooth width required for transmitting the torque.
In order to turn the turning gear 1, two turning pinions 2
Is required. Therefore, in order to drive the two turning pinions 2 provided so as to face each other, two electric motors 3 are required in any of the above-described embodiments.

Therefore, as shown in the gear arrangement diagram of FIG.
A sixth embodiment in which two turning pinions 2 are arranged side by side to drive the turning gear 1 to turn the turning gear 1 with one electric motor 3 will be described with reference to the side view shown in FIG. Will be described. In the sixth embodiment, a single control system such as the motor control unit 5 is constructed by using one electric motor 3, and the output shaft 3a of the electric motor 3 is provided.
The gear mechanism 17 drives two output shafts 18, and the output shaft 18 drives two turning pinions 2 to turn the turning gear 1.

With this configuration, the number of components is reduced, and when an inverter is used for the electric motor 3, the cost can be reduced because only one inverter is required. In the sixth embodiment, the steering handle 7 is also used.
Since the turning command from a is transmitted in the same manner as in the first embodiment, the details are omitted.

As described above, according to the present invention, since the turning drive of the turning type thruster T is entirely configured by an electric method, it is necessary to use hydraulic equipment as in the prior art shown in FIG. The hydraulic pump 57, the valve unit 58, the oil cooler 62, and the piping 63 connecting these components are completely eliminated. Therefore, the efficiency of the turning drive device is greatly improved because there is no device that has conventionally deteriorated the efficiency, and the number of devices to be arranged on the platform F is greatly reduced, so that the arrangement on the platform F is simplified. The size and size can be reduced, and troubles such as oil leakage do not occur.

As a common matter in any of the above-described embodiments, the difference between the turning command signal from the steering handle 7a and the actual turning angle is detected, and the rotation speed of the electric motor 3 is reduced when the turning end is approaching. With this configuration, it is possible to eliminate the shock at the time of turning stop. Note that such control can be easily performed by introducing a turning signal of a microcomputer incorporated in the control device to the motor control unit.

Further, in each of the above-described embodiments, the turning pinion 2 is provided at two locations due to the problem of strength. However, the number is not particularly limited as long as the problem of strength is solved.

In FIG. 5, the control device 6 enclosed by a dashed line may be provided together with the steering device 7 in a well-equipped steering room in order to avoid troubles such as breakdowns. Further, when the power is cut off due to a failure of the generator or the like, the system is automatically switched to an auxiliary generator or the like.

When a plurality of electric motors 3 are used as in the first to fifth embodiments, if one of the electric motors 3 is broken, the rotation speed of the electric motor 3 is reduced to prevent overloading, Can be configured to reduce the angular velocity of the ship, but may be appropriately selected according to the type of the ship and the like.

By the way, the swiveling thruster T according to the present invention.
9 is mounted on the hull H, and as shown in the bottom view of the hull shown in FIG. At the same time, a force to turn in the straight traveling direction is generated. Therefore, since the electric motor 3 generates electricity by the torque from the rotary thruster T, the devices may be damaged. In such a case, by providing a regenerative braking function in the motor control unit 5 of the above-described first to sixth embodiments, electricity generated by the reverse torque can be returned to the ship. It also saves energy. In the case of a conventional hydraulic system, a relief valve is provided. However, when the relief valve is operated, heat is generated. Therefore, it is necessary to further increase the capacity of the cooler to remove the heat.

Further, a plurality of the above-described embodiments may be provided in parallel, and the present invention is not limited to the embodiments even if the configuration is other than the above-described embodiments. The device may be of an electric type, and the electric swing driving device may be configured to control turning / stopping and position holding by a control device.

As shown in the present invention, when the turning drive device of the turning thruster T is changed to the electric type of the present invention instead of the conventional electric / hydraulic type, the number of components is greatly reduced, and the compact For example, the turning mechanism is a turning type thruster whose turning mechanism is 1/3 or less of the electric / hydraulic type.

As a conventional technique of this kind, Japanese Patent Publication No.
There is an invention described in Japanese Patent Application Laid-Open No. 56037/1985, but the invention described in this publication is for synchronizing the turning speeds of a plurality of Z-type propulsion units to the safest value.
Although there is a device described in Japanese Patent No. 8797, the device described in this document relates to a brake device, and none of the devices relates to a technique to be solved by the present invention.

[0045]

According to the turning drive device for a turning type thruster according to the first aspect of the present invention, the efficiency of the turning device can be drastically improved since there is no deterioration in efficiency as in the hydraulic type, and energy saving can be achieved. A swiveling thruster becomes possible.

Further, since the hydraulic pump, the valve unit, the oil cooler, and the piping communicating between them are eliminated on the platform, the weight can be greatly reduced, and the swiveling thruster can be made compact and inexpensive.
Therefore, it is extremely advantageous in a tug boat or the like in which it is difficult to secure the drainage amount at the stern. In addition, since the swivel drive means is arranged on the platform of the swivel thruster and can be integrally removed, it can be integrally removed from the hull.

Further, the elimination of the hydraulic system eliminates the need for cooling water and eliminates troubles such as oil leakage.

Furthermore, since the control system to the turning mechanism are unified by an electric system, only local electricians and seafarers need to be electric technicians, and the cost required for maintenance and inspection services can be reduced. It also has the effect that it can be done.

Also, the regenerative braking function of the motor control unit can return the electric power generated by the electric motor to the inside of the ship by the torque from the turning thruster, thereby preventing damage to the equipment and saving energy.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of the present invention.

FIG. 2 is a side view showing a second embodiment of the present invention.

FIG. 3 is a side view showing a third embodiment of the present invention.

FIG. 4 is a side view showing a fourth embodiment of the present invention.

FIG. 5 is a side view showing a fifth embodiment of the present invention.

FIG. 6 is a gear arrangement diagram of a turning gear and a turning pinion in the first to fifth embodiments.

FIG. 7 is a gear arrangement diagram of a turning gear and a turning pinion in a sixth embodiment.

FIG. 8 is a side view showing a sixth embodiment of the present invention.

FIG. 9 is a schematic view showing an operation example of a turning thruster in a ship using the present invention.

FIG. 10 is a side sectional view showing a conventional swiveling thruster.

FIG. 11 is a plan view showing a conventional swiveling thruster.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Revolving gear 2 ... Revolving pinion 3 ... Electric motor 4 ... Shaft coupling 5 ... Motor control unit 6 ... Control device 7 ... Steering device 8 ... Brake device 9 ... Brake control unit 10 ... Position detector 11 ... Signal conversion unit 12 ... Planetary gear mechanism 17: Gear mechanism T: Revolving thruster F: Platform S: Strut P: Propeller H: Hull

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-222393 (JP, A) JP-A-52-37398 (JP, A) JP-A-1-314665 (JP, A) JP-A-63-63 61682 (JP, A) Japanese Utility Model 3-10996 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] A swing gear for swinging a swing thruster, a swing pinion meshed with the swing gear, and swing drive means for driving the swing pinion; wherein the swing drive means is disposed on a platform; Main propulsion of a swivel thruster that can be removed integrally with the swivel thruster
The slewing drive apparatus equipped with a ship as machine, as well as constituted by an electric servo motor or inverter control electric motor the rotation drive means, the control device for controlling the turning / stop and position holding of the electric servo motor or inverter control electric motor The above-mentioned swiveling thruster
The torque in the turning direction of the
A circuit for regenerating electricity generated by the barter control electric motor
A motor control unit having a raw braking function is provided to
A swing drive device for a swing type thruster, wherein the swing drive device is connected to a control device .