Marine diesel-electric hybrid power transmission system and method

Abstract

The invention discloses a diesel-electric hybrid power transmission system and method for a ship, and belongs to the field of ship power transmission. The invention aims to solve the problem that the existing power system is single and cannot meet the multifunctional requirements of ships on navigational speed, cruising ability, maneuverability and the like at the same time. A first output shaft of the double-shaft-extension diesel engine is connected with the driving end of the friction clutch, the driven end of the friction clutch is connected with an input shaft of the reduction gear box, an output shaft of the reduction gear box is connected with the driving end of the low-speed large-torque overrunning clutch, and the driven end of the low-speed large-torque overrunning clutch is connected with the input end of the double-shaft-extension motor. A rotating shaft of the double-shaft extension motor is connected with a propeller; an input shaft of the permanent magnet coupler is connected with a second output shaft of the double-shaft-extension diesel engine, an output shaft of the permanent magnet coupler is connected with a driving end of the permanent magnet generator, a load end of the permanent magnet generator is connected with a power receiving end of the power grid, and a power transmission end of the power grid is connected with a power supply end of the double-shaft-extension motor. The invention relates to a diesel-electric hybrid power transmission system of a ship.

Description

Technical Field

[0001] The invention relates to a marine power transmission system and belongs to the field of marine power transmission. Background Art

[0002] The power system built based on a single type of main engine has its own advantages and disadvantages in terms of power density, maximum power, economy, and maneuverability. It can no longer meet the ship's optimal requirements for speed, endurance, and maneuverability. To solve this problem, a ship hybrid power system is needed. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that the existing power system is single and cannot simultaneously meet the multi-functional requirements of ships for speed, endurance and maneuverability, and proposes a marine diesel-electric hybrid power transmission system and method.

[0004] A marine diesel-electric hybrid power transmission system, the system comprising a permanent magnet generator, a permanent magnet coupling, a double-shaft extension diesel engine, a friction clutch, a reduction gearbox, a low-speed high-torque overrunning clutch, a double-shaft extension motor, a propeller and a power grid;

[0005] The first output shaft of the double-shaft extension diesel engine is connected to the active end of the friction clutch, the driven end of the friction clutch is connected to the input shaft of the reduction gearbox, the output shaft of the reduction gearbox is connected to the active end of the low-speed high-torque overrunning clutch, the driven end of the low-speed high-torque overrunning clutch is connected to the input end of the double-shaft extension motor, and the rotating shaft of the double-shaft extension motor is connected to the propeller;

[0006] The input shaft of the permanent magnet coupling is connected to the second output shaft of the double-axle diesel engine, the output shaft of the permanent magnet coupling is connected to the driving end of the permanent magnet generator, the load end of the permanent magnet generator is connected to the power receiving end of the power grid, and the transmission end of the power grid is connected to the power supply end of the double-axle motor.

[0007] Preferably, the system further comprises a power supply and energy storage system;

[0008] The power supply end of the power supply energy storage system is connected to the power supply end of the permanent magnet generator;

[0009] The power receiving end of the power supply and energy storage system is connected to the power grid.

[0010] Preferably, the power supply and energy storage system is implemented using batteries.

[0011] A marine diesel-electric hybrid power transmission method, the method is implemented based on a marine diesel-electric hybrid power transmission system, the method comprises the following contents:

[0012] Full diesel propulsion mode:

[0013] The permanent magnet coupling is disconnected, the friction clutch is engaged, and the double-shaft extension diesel engine drives the reduction gearbox to operate. At this time, the speed of the active end of the low-speed high-torque overrunning clutch is higher than the speed of the driven end, so that the low-speed high-torque overrunning clutch is in an engaged state, and then the propeller is driven to operate through the rotating shaft of the double-shaft extension motor;

[0014] Off-site zero-pollution all-electric propulsion mode:

[0015] The double-shaft diesel engine stops running, and the battery discharges to the grid through the permanent magnet generator, and drives the double-shaft motor through the grid to run, thereby driving the propeller; at this time, the driven end of the low-speed high-torque overrunning clutch has a higher speed than the active end, so that the low-speed high-torque overrunning clutch is in a disengaged state, and the reduction gearbox and the double-shaft diesel engine are both in a stationary state;

[0016] Low-noise all-electric propulsion mode:

[0017] The friction clutch is disconnected, the permanent magnet coupling is engaged, the double-shaft diesel engine runs and drives the permanent magnet generator and the auxiliary unit on board to supply power to the grid. At the same time, the double-shaft electric motor draws power from the grid and drives the propeller to run. At this time, the driven end of the low-speed high-torque overrunning clutch has a higher speed than the active end, so that the low-speed high-torque overrunning clutch is in a disengaged state and the reduction gearbox is in a stationary state.

[0018] Hybrid propulsion mode:

[0019] The permanent magnet coupling is disconnected, the friction clutch is engaged, and the double-shaft extension diesel engine drives the reduction gearbox to operate. At this time, the speed of the active end of the low-speed and high-torque overrunning clutch is higher than the speed of the driven end, so that the low-speed and high-torque overrunning clutch is in an engaged state, and the power is transmitted to the rotating shaft of the double-shaft extension motor. At the same time, the double-shaft extension motor draws power from the power grid and the power transmitted by the double-shaft extension diesel engine to realize parallel operation on the rotating shaft of the double-shaft extension motor to jointly drive the propeller.

[0020] The beneficial effects of the present invention are:

[0021] The present invention uses a double-axle diesel engine as a main engine for acceleration and propulsion, and a double-axle electric motor as a main engine for off-duty zero-pollution and low-noise operation, and reasonably configures the use of friction clutch, permanent magnet coupling, and low-speed high-torque overrunning clutch connection components to obtain a marine diesel-electric hybrid power transmission system with acceleration performance, strong endurance, strong maneuverability, low pollution, and low noise;

[0022] The present invention can realize functions such as off-duty zero-pollution all-electric propulsion, all-diesel propulsion, hybrid propulsion and low-noise all-electric propulsion, and has excellent performances such as accelerated propulsion and low noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1The schematic diagram is a principle diagram of a marine diesel-electric hybrid power transmission system. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0027] Embodiment 1:

[0028] Combination Figure 1 This embodiment is described, a marine diesel-electric hybrid power transmission system, the system comprises a permanent magnet generator 1, a permanent magnet coupling 3, a double-shaft extension diesel engine 4, a friction clutch 5, a reduction gearbox 6, a low-speed high-torque overrunning clutch 7, a double-shaft extension motor 8, a propeller 9 and a power grid 10;

[0029] The first output shaft of the double-axle diesel engine 4 is connected to the active end of the friction clutch 5, the driven end of the friction clutch 5 is connected to the input shaft of the reduction gearbox 6, the output shaft of the reduction gearbox 6 is connected to the active end of the low-speed high-torque overrunning clutch 7, the driven end of the low-speed high-torque overrunning clutch 7 is connected to the input end of the double-axle motor 8, and the rotating shaft of the double-axle motor 8 is connected to the propeller 9;

[0030] The input shaft of the permanent magnet coupling 3 is connected to the second output shaft of the double-axle diesel engine 4, the output shaft of the permanent magnet coupling 3 is connected to the driving end of the permanent magnet generator 1, the load end of the permanent magnet generator 1 is connected to the power receiving end of the power grid 10, and the transmission end of the power grid 10 is connected to the power supply end of the double-axle motor 8.

[0031] Specifically, the diesel engine of this embodiment has the characteristic of good economy compared with the gas turbine and the steam turbine, and the electric motor has the characteristic of low noise, so the diesel engine and the electric motor are used in combination to give full play to the excellent characteristics of both to realize the multi-functional ship needs.

[0032] The marine diesel-electric hybrid power transmission system formed by this embodiment has three operating modes: full diesel propulsion, full electric propulsion and hybrid propulsion.

[0033] The system composition is further limited as follows: the system also includes a power supply and energy storage system;

[0034] The power supply end of the power supply energy storage system is connected to the power supply end of the permanent magnet generator 1;

[0035] The power receiving end of the power supply and energy storage system is connected to the power grid 10 .

[0036] The composition of the power supply and energy storage system is further limited: the power supply and energy storage system is implemented by a storage battery 2.

[0037] Embodiment 2:

[0038] A marine diesel-electric hybrid power transmission method, the method is implemented based on a marine diesel-electric hybrid power transmission system, the method comprises the following contents:

[0039] Full diesel propulsion mode:

[0040] The permanent magnetic coupling 3 is disconnected, the friction clutch 5 is engaged, and the double-axle extension diesel engine 4 drives the reduction gearbox 6 to operate. At this time, the active end speed of the low-speed high-torque overrunning clutch 7 is higher than the driven end speed, so that the low-speed high-torque overrunning clutch 7 is in an engaged state, and then the propeller 9 is driven to operate through the rotating shaft of the double-axle extension motor 8;

[0041] Off-site zero-pollution all-electric propulsion mode:

[0042] The double-axle diesel engine 4 stops running, the battery 2 discharges to the power grid 10 through the permanent magnet generator 1, and drives the double-axle motor 8 to run through the power grid 10, thereby driving the propeller 9; at this time, the driven end of the low-speed high-torque overrunning clutch 7 has a higher speed than the active end, so that the low-speed high-torque overrunning clutch 7 is in a disengaged state, and the reduction gearbox 6 and the double-axle diesel engine 4 are both in a stationary state;

[0043] Low-noise all-electric propulsion mode:

[0044] The friction clutch 5 is disconnected, the permanent magnet coupling 3 is engaged, the double-shaft extension diesel engine 4 is running and drives the permanent magnet generator 1 and the auxiliary unit on board to jointly supply power to the power grid 10. At the same time, the double-shaft extension motor 8 is powered by the power grid 10 and drives the propeller 9 to operate. At this time, the driven end of the low-speed high-torque overrunning clutch 7 has a higher speed than the active end, so that the low-speed high-torque overrunning clutch 7 is in a disengaged state, and the reduction gearbox 6 is in a stationary state.

[0045] Hybrid propulsion mode:

[0046] The permanent magnet coupling 3 is disconnected, the friction clutch 5 is engaged, and the double-shaft diesel engine 4 drives the reduction gearbox 6 to operate. At this time, the active end speed of the low-speed and high-torque overrunning clutch 7 is higher than the driven end speed, so that the low-speed and high-torque overrunning clutch 7 is in an engaged state, and the power is transmitted to the rotating shaft of the double-shaft motor 8. At the same time, the double-shaft motor 8 draws electricity from the power grid 10 and the power transmitted by the double-shaft diesel engine 4 on the rotating shaft of the double-shaft motor 8 to realize parallel operation and jointly drive the propeller 9.

[0047] Specifically, in the full diesel propulsion mode, since the permanent magnet coupling 3 is disconnected, the permanent magnet generator 1 does not generate electricity, and the double-axle extension motor 8 does not supply power. The double-axle extension diesel engine 4 is fully used to drive the propeller 9 to operate.

[0048] In the low-noise all-electric propulsion mode, the permanent magnetic coupling 3 has vibration absorption characteristics, which makes the power supply to the power grid 10 more stable. In addition, the reduction gearbox 6 and the like are all in a stationary state and do not generate noise.

[0049] The hybrid propulsion mode can be used as maximum power propulsion.

[0050] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A marine diesel-electric hybrid power transmission system, characterized in that: The system comprises a permanent magnet generator (1), a permanent magnet coupling (3), a double-shaft extension diesel engine (4), a friction clutch (5), a reduction gear box (6), a low-speed high-torque overrunning clutch (7), a double-shaft extension motor (8), a propeller (9) and a power grid (10); The first output shaft of the double-axle diesel engine (4) is connected to the active end of the friction clutch (5), the driven end of the friction clutch (5) is connected to the input shaft of the reduction gear box (6), the output shaft of the reduction gear box (6) is connected to the active end of the low-speed high-torque overrunning clutch (7), the driven end of the low-speed high-torque overrunning clutch (7) is connected to the input end of the double-axle motor (8), and the rotating shaft of the double-axle motor (8) is connected to the propeller (9); The input shaft of the permanent magnet coupling (3) is connected to the second output shaft of the double-axle diesel engine (4), the output shaft of the permanent magnet coupling (3) is connected to the driving end of the permanent magnet generator (1), the load end of the permanent magnet generator (1) is connected to the power receiving end of the power grid (10), and the power transmission end of the power grid (10) is connected to the power supply end of the double-axle motor (8).

2. A marine diesel-electric hybrid power transmission system according to claim 1, characterized in that: The system also includes a power supply and energy storage system; The power supply end of the power supply and energy storage system is connected to the power supply end of the permanent magnet generator (1); The power receiving end of the power supply and energy storage system is connected to the power grid (10).

3. A marine diesel-electric hybrid power transmission system according to claim 2, characterized in that: The power supply and energy storage system is implemented by using a storage battery (2).

4. A marine diesel-electric hybrid power transmission method, the method is implemented based on the marine diesel-electric hybrid power transmission system according to claim 3, characterized in that: The method comprises the following: Full diesel propulsion mode: The permanent magnetic coupling (3) is disconnected, the friction clutch (5) is engaged, and the double-axle extension diesel engine (4) drives the reduction gearbox (6) to operate. At this time, the speed of the active end of the low-speed high-torque overrunning clutch (7) is higher than the speed of the driven end, so that the low-speed high-torque overrunning clutch (7) is in an engaged state, and then the propeller (9) is driven to operate through the rotating shaft of the double-axle extension motor (8); Off-site zero-pollution all-electric propulsion mode: The double-shaft diesel engine (4) stops running, the storage battery (2) discharges to the power grid (10) through the permanent magnet generator (1), and drives the double-shaft electric motor (8) to run through the power grid (10), thereby driving the propeller (9); at this time, the driven end of the low-speed high-torque overrunning clutch (7) has a higher speed than the driving end, so that the low-speed high-torque overrunning clutch (7) is in a disengaged state, and the reduction gear box (6) and the double-shaft diesel engine (4) are both in a stationary state; Low-noise all-electric propulsion mode: The friction clutch (5) is disconnected, the permanent magnet coupling (3) is engaged, the double-shaft extension diesel engine (4) is running and drives the permanent magnet generator (1) and the auxiliary unit on board to jointly supply power to the power grid (10), and at the same time, the double-shaft extension motor (8) draws power from the power grid (10) to operate and drives the propeller (9) to operate; at this time, the driven end of the low-speed high-torque overrunning clutch (7) has a higher speed than the driving end, so that the low-speed high-torque overrunning clutch (7) is in a disengaged state, and the reduction gearbox (6) is in a stationary state; Hybrid propulsion mode: The permanent magnetic coupling (3) is disconnected, the friction clutch (5) is engaged, and the double-shaft diesel engine (4) drives the reduction gearbox (6) to operate. At this time, the speed of the active end of the low-speed high-torque overrunning clutch (7) is higher than the speed of the driven end, so that the low-speed high-torque overrunning clutch (7) is in an engaged state, and power is transmitted to the rotating shaft of the double-shaft motor (8). At the same time, the double-shaft motor (8) takes power from the power grid (10) and the power transmitted by the double-shaft diesel engine (4) on the rotating shaft of the double-shaft motor (8) to realize parallel operation and jointly drive the propeller (9).

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