KR20210098657A - A multi-drive variable propulsion system for ships - Google Patents

Abstract

The present invention relates to a propulsion device for driving a propeller of a ship, which, in particular, in generating a propulsive force using a plurality of motors, is configured to enable continuous speed change according to conditions. A multi-drive variable propulsion device for a ship according to the present invention for achieving the above objective comprises: a driving unit having a driven gear which is meshed with driving gears mounted on the plurality of motors and rotates, and located inside a hull; a gear housing located outside the hull, equipped with a propeller at one end and having a shaft that is extended from the driven gear and enters thereinto; and a planetary gear set mounted inside the gear housing, receiving power from the shaft extended from the driven gear and transmitting the power to an output shaft connected to the propeller.

Description

A multi-drive variable propulsion system for ships}

The present invention relates to a propulsion device for driving a propeller of a ship, and in particular, in generating propulsive force using a plurality of motors, it is configured to enable continuous speed change according to conditions.

A propeller that generates thrust is mounted at the lower end of the stern of the ship, and the shaft connected to the propeller is connected to the engine mounted in the ship. Therefore, the propeller rotates according to the operation of the engine, and the vessel operates accordingly.

In general, the propulsion device of a ship has a structure in which a propeller is mounted on the end of a shaft connected to an engine, and the propeller rotates by power generated from the engine to generate thrust. In the case of a thrust device of this structure, the larger the ship, the larger the engine and the larger propeller should be installed.

On the other hand, in the case of a ship equipped with a conventional thrust device as in the prior art, when an engine or motor rotating a propeller does not operate due to an abnormality, the ship loses thrust, thereby making it impossible to operate.

In addition, there is a problem in that the entire propulsion device must be replaced or changed when a greater output is required.

On the other hand, there is a problem in that a controllable pitch propeller (CPP) having a complex structure or an expensive variable frequency drive (VFD) must be used to rotate a propeller connected to a high speed driving body (engine or motor) at a low speed. Since the speed ratio is determined only by an integer ratio according to the dimensions of the gears installed inside the reducer, it is difficult to implement a continuous speed change.

Republic of Korea Patent Publication No. 10-2012-0099684 (published date; 2012.09.11.)

The present invention was invented to solve the problems of the prior art as described above, and a multi-drive variable propulsion device for ships capable of continuously changing the speed of a propeller by combining a plurality of driving bodies that generate small power compared to the maximum thrust. Its purpose is to provide

A multi-drive variable propulsion device for a ship according to the present invention for achieving the above object is provided with a driven gear that meshes with driving gears mounted on a plurality of motors and rotates, and a driving unit located inside the hull, and located outside the hull At one end, the propeller is mounted and the shaft extended from the driven gear enters the gear housing, and the planetary gear set is mounted inside the gear housing and receives power from the shaft extended from the driven gear and transmits power to the output shaft connected to the propeller. It is a technical feature to include.

Further, according to a preferred embodiment of the present invention, the driving gear is the first bevel gear and the driven gear is the second bevel gear, and the second bevel is the driven gear by the first bevel gears driven by a plurality of horizontal motors The gear rotates.

In addition, according to a preferred embodiment of the present invention, the driving gear is the first spur gear and the driven gear is the second spur gear, and the second spur gear is the driven gear by the first spur gears driven by a plurality of vertical motors. The gear rotates.

In addition, according to a preferred embodiment of the present invention, the third bevel gear is fixed to the end of the shaft extending from the driven gear into the gear housing, and the shaft fixed to the fourth bevel gear meshed with the third bevel gear is the planetary gear set. It is fixed to the ring gear and rotates the ring gear.

In addition, according to a preferred embodiment of the present invention, the planetary gear set includes a sun gear positioned at the center, a ring gear connected to the axis of the fourth bevel gear, and an outer circumferential surface of the sun gear and an inner circumferential surface of the ring gear to mesh with the sun gear. Planetary gears revolving around and rotating, and a carrier connecting a plurality of planetary gears and having an axis fixed at the center, the rotational speed of the sun gear is controlled by an electrical device having a brake disk.

In addition, according to a preferred embodiment of the present invention, the shaft is fixed to the shaft fixed to the carrier and the shaft of the propeller, respectively, it further includes a gear meshed with each other.

As described above, in the multi-drive variable propulsion device for ships according to the present invention, as a plurality of actuators are combined to generate thrust, abnormalities and maintenance occur in one of the actuators, so even if power cannot be generated, the It has the advantage of high safety because it is possible to operate at low speed by generating thrust by power.

In addition, when a small thrust is required as a plurality of actuators are combined, the necessary thrust can be generated by the operation of some of the actuators, which is more economical than driving a large engine as in the prior art.

In addition, continuous torque transmission according to speed fluctuations is possible through electrical continuously variable transmission, and when greater thrust is required, the entire engine has to be replaced in the prior art, but a separate driving body (motor or engine) is used. Thrust can be increased by installing additionally.

1 is a conceptual diagram showing a multi-drive variable propulsion device for a ship according to the present invention;
2A and 2B are perspective views showing examples of the actuator shown in FIG. 1,
Figure 3 is a cross-sectional view showing an example of the planetary gear set shown in Figure 1,
4 is a conceptual diagram for explaining a power transmission relationship of the planetary gear set shown in FIG. 3 .

Hereinafter, a preferred embodiment of a multi-drive variable propulsion device for a ship according to the present invention will be described in detail with reference to the accompanying drawings.

In the drawings, FIG. 1 is a conceptual diagram showing a multi-drive variable propulsion device for a ship according to the present invention, FIGS. 2A and 2B are perspective views showing examples of the driving body shown in FIG. 1 , and FIG. It is a cross-sectional view showing an example of a gear set, and FIG. 4 is a conceptual diagram for explaining a power transmission relationship of the planetary gear set shown in FIG. 3 .

1, the driving unit 110 of the multi-drive variable propulsion device for ships is located inside the hull, and the shaft R2 rotated by the driving unit 110 is connected to the propeller 150 located below the stern.

Hereinafter, the driving unit 110 of the multi-drive variable propulsion device for ships will be described in detail.

As shown in Figures 1 and 2a, the driving unit 110 is located inside the hull (1).

The driving unit 110 includes a plurality of horizontal motors 111 , a first bevel gear G1 which is a driving gear mounted on each horizontal motor 111 , and a plurality of first bevel gears G1 to rotate. It includes a second bevel gear (G2) which is a driven gear rotated by the rotation shaft (S1) connected to the second bevel gear (G2) is extended to the outside of the hull (1).

Here, the first bevel gear G1 and the second bevel gear G2 are meshed with each other to transmit power, and the four first bevel gears G1 meshed with the second bevel gear G2 have each horizontal type. The motor 111 is mounted and rotates at a set rotation speed.

Accordingly, the second bevel gear G2 rotates at a constant speed according to the rotational speed of the four horizontal motors 111, and accordingly, the rotating shaft S1 extending to the outside of the hull 1 also rotates at a constant speed. .

Meanwhile, as shown in FIG. 2B , the driving unit 110 may include a vertical motor 111 . In this case, the driving gear becomes a first spur gear (not shown), the driven gear becomes a second spur gear (not shown), and the rotation shaft S1 has a structure in which the second spur gear is mounted on the driven gear.

As such, the driving unit 110 may include a horizontal motor as shown in FIG. 2A or a vertical motor as shown in FIG. 2B , and below, the horizontal motor and the vertical motor are collectively referred to as the motor 111 . and will be described in detail based on the configuration shown in FIGS. 1 and 2A.

On the other hand, the rotating shaft (S1) extending out of the hull 1 extends into the gear housing 120 through the gear housing 120 mounted on the stern.

Inside the gear housing 120, the third bevel gear G3 is fixed to the end of the rotation shaft S1 and rotates at the same rotation speed as the rotation shaft S1, and the third bevel gear G3 is meshed with and rotates. It includes a four-bevel gear G4, and a planetary gear set 130 capable of continuously changing speed is mounted on the fourth bevel gear G4.

And the output shaft S4 connected to the planetary gear set 130 extends through the gear housing 120 to the outside, and a propeller 150 is mounted at an end of the output shaft S4.

Here, the planetary gear set 130 has a ring gear 131 having a gear formed thereon on its inner circumferential surface, a sun gear 133 is positioned at the center, and meshes with the inner circumferential surface of the ring gear 131 and the outer circumferential surface of the sun gear 133 . and a plurality of planetary gears 135 capable of revolving and rotating around the sun gear 133, and the planetary gears 135 are connected to the carrier 137, and the shaft S3 is fixed to the carrier 137. structure, and the shaft S2 of the fourth bevel gear G4 is connected to the ring gear 131 to rotate the ring gear 131 .

In addition, an electrical machine (EM) 140 including a brake disk is mounted on the planetary gear set 130 to control the rotation speed of the sun gear 133 . 3 and 4, the electric device 140 is fixed to the inner peripheral surface of the rotor 141 and the gear housing 120 fixed to the circumference of the sun gear 133, the rotor 141 and the gap It includes a stator 143 positioned to put.

In addition, the shaft S3 fixed to the carrier 137 and the output shaft S4 of the propeller 150 are connected by spur gears R5, and as the shaft S3 of the carrier 137 rotates, the propeller 150 The output shaft S4 rotates to generate thrust.

The operational relationship of the multi-drive variable propulsion device for ships configured as described above will be described.

When the driving unit 110 located inside the hull 1, that is, the motors 111 operates, the first bevel gear G1 connected to the motor 111 rotates, and the second bevel gear meshes with the first bevel gear G1. Gear G2 rotates. At this time, the rotation of the second bevel gear G2 according to the rotation speed of the motor 111 is determined by the gear ratio between the first bevel gear G1 and the second bevel gear.

On the other hand, the third bevel gear (G3) rotates with the rotation of the second bevel gear (G2), transmits power to the fourth bevel gear (G4), and on the axis (S2) of the fourth bevel gear (G4). When the fixed ring gear 131 rotates, the planet gear 135 and the sun gear 133 rotate according to the rotation of the ring gear 131. An electrical device for controlling the rotation speed of the sun gear 133 ( 140), the rotation speed of the sun gear 133 is controlled by the control.

As described above, as the rotation speed of the sun gear 133 is controlled, the rotation speed of the planet gear 135 rotating around the sun gear 133 is controlled, and a carrier 137 connecting the plurality of planet gears 135 . The rotational speed of is controlled, and eventually the rotational speed of the shaft S3 fixed to the carrier 137 is controlled.

The shaft S3 of the carrier 137 and the output shaft S4 of the propeller 150 are connected by a spur gear R5, so that the output shaft S4 rotates according to the gear ratio of the spur gears R5.

As described above, in the multi-drive variable propulsion device for ships according to the present invention, as the driving unit 110 is composed of a plurality of motors 111 , even if any one or two of the plurality of motors 111 are stopped, the power of the other motor By the propeller 150 is rotated. That is, as the stopped motor 111 occurs, the thrust decreases, but the ship does not stop and maintains a continuously operable state, and necessary time for maintenance and replacement of the motor 111 can be secured.

On the other hand, the power transmitted from the shaft S2 of the fourth bevel gear G4 is the output shaft of the propeller 150 with continuous speed and torque change by the control of the gear ratio of the planetary gear set 130 and the electrical device 140 . It becomes possible to output in (S4). Therefore, there is an advantage that various speed and torque changes are possible outside the output range limited to the gear ratio of the reducer as in the prior art.

In addition, there is an advantage in that it is easy to increase and decrease the thrust as a separate motor is added to increase the thrust.

1: hull
110: drive unit
111: motor
120: gear housing
130: planetary gear set
131: ring gear
133: sun gear
135: planetary gear
137: carrier
140: electrical device
141: rotor
143: stator
150: propeller
S1 ~ S4 : axis
G1 ~ G5 : Gear

Claims (6)

A driving unit having a driven gear that is meshed with the driving gears mounted on the plurality of motors and rotates and is located inside the hull;
A gear housing located outside the hull and equipped with a propeller at one end and into which the shaft extended from the driven gear entered;
A multi-drive variable propulsion device for ships, comprising a planetary gear set mounted inside the gear housing and receiving power from a shaft extending from the driven gear and transmitting the power to an output shaft connected to the propeller.
According to claim 1,
The driving gear is the first bevel gear and the driven gear is the second bevel gear, and the second bevel gear, which is the driven gear, is rotated by the first bevel gears driven by a plurality of horizontal motors. variable propulsion.
According to claim 1,
The driving gear is the first spur gear and the driven gear is the second spur gear, and the second spur gear, which is the driven gear, is rotated by the first spur gears driven by a plurality of vertical motors. variable propulsion.
4. The method according to any one of claims 1 to 3,
The third bevel gear is fixed to the end of the shaft extending from the driven gear into the gear housing, and the shaft fixed to the fourth bevel gear meshed with the third bevel gear is fixed to the ring gear of the planetary gear set to rotate the ring gear. A multi-drive variable propulsion system for ships characterized by the
5. The method of claim 4,
The planetary gear set includes a sun gear positioned at the center, a ring gear connected to the axis of the fourth bevel gear, and planetary gears meshed with the outer circumferential surface of the sun gear and the inner circumferential surface of the ring gear to revolve and rotate around the sun gear, A multi-drive variable propulsion device for a ship, characterized in that it connects a plurality of planetary gears and includes a carrier having an axis fixed at the center, and the rotation speed of the sun gear is controlled by an electrical device having a brake disk.
6. The method of claim 5,
A multi-drive variable propulsion device for ships, characterized in that it further comprises a gear fixed to the shaft and the propeller shaft fixed to the carrier and meshed with each other.

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