A new type of ship hybrid propulsion system

Abstract

The present invention discloses a novel ship hybrid propulsion system, which is composed of a propeller, a magnetic coupling propulsion device, a prime mover for propulsion, a coupling control device, a variable frequency speed regulation device, a protection and operation management device, a generator set, and other loads, etc. The magnetic coupling propulsion device absorbs mechanical energy from the prime mover for propulsion and electrical energy from the variable frequency speed regulation device, drives the propeller to rotate, and realizes the alternating and combined operation of electric propulsion and mechanical propulsion. Compared with the traditional ship hybrid propulsion system coupled with a mechanical gearbox, it has the advantages of a simple mechanical propulsion and electric propulsion coupling device, small volume, light weight, low vibration and noise, as well as simple switching between mechanical and electric propulsion, recoverable energy utilization, and good economy, etc. It is particularly suitable for ship propulsion with high performance requirements for performance indicators such as the volume, weight, vibration and noise, and power supply reliability of the propulsion system.

Description

Technical Field

[0001] The present invention belongs to the field of ship propulsion, and particularly relates to a novel ship hybrid propulsion system. Background Art

[0002] Ship propulsion generally includes three types: all-mechanical propulsion, hybrid propulsion, and all-electric propulsion.

[0003] Mechanical propulsion is a way of realizing ship propulsion by directly driving a propeller by a prime mover through a gearbox. Electric propulsion generally drives a generator to generate electricity by a prime mover, supplies power to a propulsion motor through an inverter from a power supply, and realizes a propulsion method of variable frequency and variable voltage speed regulation of the propulsion motor. Compared with the mechanical propulsion method, the electric propulsion method mainly has the advantages of flexible layout, more effective use of space, flexible operation, good maneuverability, low vibration and noise, less maintenance work, and easy to obtain ideal driving characteristics, etc., and is one of the mainstream trends in the development of ship propulsion; however, the all-electric propulsion method has the disadvantages of large volume, high weight, and large initial investment of the whole system.

[0004] The hybrid propulsion method of mechanical propulsion + electric propulsion can overcome the disadvantages of both to a certain extent and give play to the advantages of both. However, the traditional diesel-electric-fuel hybrid propulsion method has the disadvantages of complex coupling devices between mechanical propulsion and electric propulsion methods, large volume and weight, high vibration and noise, complex switching between mechanical and electric propulsion, and difficult to fully utilize energy, etc., and it is difficult to meet the usage requirements of high-end users. Summary of the Invention

[0005] In order to overcome the disadvantages of the traditional diesel-electric-fuel hybrid propulsion system, such as complex coupling devices between mechanical propulsion and electric propulsion methods, large volume and weight, high vibration and noise, complex switching between mechanical and electric propulsion, and difficult to fully utilize energy, etc., the present invention provides a novel ship hybrid propulsion system.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: A new type of ship hybrid propulsion system includes a propeller and a prime mover for propulsion connected to the propeller, and also includes a magnetic coupling propulsion device connected between the propeller and the prime mover for propulsion. The magnetic coupling propulsion device is respectively connected to a protection and operation management device through a coupling control device and a variable frequency speed regulation device. The protection and operation management device is respectively connected to a generator set and other loads. Under high-speed conditions, when all system equipment is working, the magnetic coupling propulsion device is powered by both the coupling control device and the variable frequency speed regulation device. The magnetic coupling propulsion device absorbs mechanical energy from the prime mover for propulsion and also absorbs electrical energy from the variable frequency speed regulation device, driving the propeller to rotate, realizing the alternating and combined operation of electric propulsion and mechanical propulsion. Under medium-speed conditions, when the variable frequency speed regulation device is not working, the magnetic coupling propulsion device is powered by the coupling control device. The magnetic coupling propulsion device only absorbs mechanical energy from the prime mover for propulsion, driving the propeller to rotate, realizing mechanical propulsion operation. Under low-speed conditions, when the prime mover for propulsion is not working, the magnetic coupling propulsion device is powered by the variable frequency speed regulation device. The magnetic coupling propulsion device only absorbs electrical energy from the variable frequency speed regulation device, driving the propeller to rotate, realizing electric propulsion. In the case of a generator set failure, the variable frequency speed regulation device has a four-quadrant operation function, and the magnetic coupling propulsion device is driven by the prime mover for propulsion to generate electrical energy and supply power to other loads.

[0007] For the new type of ship hybrid propulsion system described above, its magnetic coupling propulsion device is composed of a stator, an inner rotor, an outer rotor, a control winding, and a power winding. The outer rotor, inner rotor, and stator are arranged from outside to inside in sequence. Among them, the outer rotor is connected to the propeller, the inner rotor is connected to the prime mover for propulsion, the control winding is connected to the coupling control device, and the power winding is connected to the variable frequency speed regulation device.

[0008] For the new type of ship hybrid propulsion system described above, its power winding is an m-phase winding, m = 3n, n = 2, 3, 4, …, and the control winding is a 3-phase winding.

[0009] The technical effects of the present invention are as follows:

[0010] The present invention realizes the magnetic coupling of mechanical propulsion and electric propulsion by adopting a magnetic coupling propulsion device, a coupling control device, and a variable frequency speed regulation device, effectively reducing the coupling complexity of the system, reducing the volume and weight of system equipment, and improving the vibration and noise reduction performance of the system.

[0011] The present invention adopts a structural mode in which a magnetic coupling propulsion device is arranged from outside to inside as an outer rotor, an inner rotor, and a stator, further improving the volume and weight density of the magnetic coupling propulsion device; by adopting a polyphase power winding, the vibration and noise performance index of the magnetic coupling propulsion device is further improved; by adopting a four-quadrant variable frequency speed regulation device, in the case of a generator set failure, the magnetic coupling propulsion device can drive the propeller to rotate on the one hand and generate electric energy on the other hand to supply power to other loads, realizing the feedback utilization of the mechanical energy of the prime mover for propulsion, improving the power supply reliability of the whole ship, and enhancing the economy of system operation.

[0012] Compared with the traditional ship hybrid propulsion system coupled with a mechanical gearbox, the present invention has the advantages of simple mechanical propulsion and electric propulsion coupling device, small volume, light weight, low vibration and noise, as well as simple switching between mechanical and electric propulsion, recoverable energy utilization, and good economy, and is particularly suitable for ship propulsion with high performance index requirements for the volume, weight, vibration and noise, and power supply reliability of the propulsion system. Brief Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of the system of the present invention;

[0014] Figure 2 It is a schematic structural diagram of the magnetic coupling propulsion device of the present invention.

[0015] Description of the marks in the figure: 1 - propeller, 2 - magnetic coupling propulsion device, 21 - stator, 22 - outer rotor, 23 - inner rotor, 24 - control winding, 25 - power winding, 3 - prime mover for propulsion, 4 - coupling control device, 5 - variable frequency speed regulation device, 6 - protection and operation management device, 7 - generator set, 8 - other loads. Detailed Embodiments

[0016] To make the purpose, technical solutions and advantages of the present invention clearer, the following will elaborate on each embodiment of the present invention in conjunction with the drawings. However, those of ordinary skill in the art can understand that in each embodiment of the present invention, many technical details are proposed for the convenience of readers to understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in each claim of the present application can still be realized.

[0017] Refer to Figure 1As shown in the figure, a new type of ship hybrid propulsion system (single shaft system) disclosed by the present invention includes a propeller 1, a magnetic coupling propulsion device 2, a prime mover 3 for propulsion, a coupling control device 4, a variable frequency speed regulation device 5, a protection and operation management device 6, a generator set 7, and a set of other loads 8. The magnetic coupling propulsion device 2 absorbs mechanical energy from the prime mover 3 for propulsion and electrical energy from the variable frequency speed regulation device 5, drives the propeller 1 to rotate, and realizes the alternating and combined operation of electric propulsion and mechanical propulsion, which can effectively reduce the coupling complexity of the system, reduce the volume and weight of system equipment, and improve the vibration reduction and noise reduction performance of the system.

[0018] Under high-speed conditions, all system equipment works. The magnetic coupling propulsion device 2 is powered by the coupling control device 4 and the variable frequency speed regulation device 5 at the same time. The magnetic coupling propulsion device 2 absorbs both mechanical energy from the prime mover 3 for propulsion and electrical energy from the variable frequency speed regulation device 5, drives the propeller 1 to rotate, and realizes the alternating and combined operation of electric propulsion and mechanical propulsion.

[0019] Under medium-speed conditions, the variable frequency speed regulation device 5 may not work. The magnetic coupling propulsion device 2 is powered by the coupling control device 4. The magnetic coupling propulsion device 2 only absorbs mechanical energy from the prime mover 3 for propulsion, drives the propeller 1 to rotate, and realizes mechanical propulsion operation.

[0020] Under low-speed conditions, the prime mover 3 for propulsion does not work. The magnetic coupling propulsion device 2 is powered by the variable frequency speed regulation device 5. The magnetic coupling propulsion device 2 only absorbs electrical energy from the variable frequency speed regulation device 5, drives the propeller 1 to rotate, and realizes electric propulsion.

[0021] The variable frequency speed regulation device 5 has a four-quadrant operation function, and can realize that in the case of a fault of the generator set 7, the prime mover 3 for propulsion drives the magnetic coupling propulsion device 2 to generate electrical energy and supply power to other loads 8.

[0022] Refer to Figure 2 As shown in the figure, the magnetic coupling propulsion device 2 is composed of a stator 21, an inner rotor 23, an outer rotor 22, a control winding 24, and a power winding 25. The magnetic coupling propulsion device 2 is arranged in the structure of the outer rotor 22, the inner rotor 23, and the stator 21 from the outside to the inside in sequence to further improve the volume and weight density of the magnetic coupling propulsion device 2, wherein the outer rotor 22 is connected to the propeller 1, the inner rotor 23 is connected to the prime mover 3 for propulsion, the control winding 24 is connected to the coupling control device 4, and the power winding 25 is connected to the variable frequency speed regulation device 5.

[0023] The power winding 25 is an m-phase winding, m = 3n, n = 2, 3, 4,..., and the control winding 24 is a 3-phase winding to further improve the vibration and noise performance index of the magnetic coupling propulsion device 2.

[0024] The protection and operation management of the patent application system under different operating conditions are realized by the protection and operation management device 6.

[0025] Those of ordinary skill in the art can understand that the above embodiments are specific examples for implementing the present invention. In actual applications, various changes can be made to them in form and details without departing from the spirit and scope of the present invention; any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A novel ship hybrid propulsion system, comprising a thruster (1) and a prime mover for propulsion (3) connected to the thruster (1), characterized in that: It further includes a magnetic coupling propulsion device (2) connected between a thruster (1) and a prime mover for propulsion (3), and the magnetic coupling propulsion device (2) is respectively connected to a protection and operation management device (6) through a coupling control device (4) and a variable frequency speed regulation device (5), and the protection and operation management device (6) is respectively connected to a generator set (7) and other loads (8); The magnetic coupling propulsion device (2) is composed of a stator (21), an inner rotor (23), an outer rotor (22), a control winding (24) and a power winding (25). The outer rotor (22), the inner rotor (23) and the stator (21) are arranged in sequence from outside to inside. Among them, the outer rotor (22) is connected to the thruster (1), the inner rotor (23) is connected to the prime mover for propulsion (3), the control winding (24) is connected to the coupling control device (4), and the power winding (25) is connected to the variable frequency speed regulation device (5); Under high-speed conditions, when all equipment is working, the magnetic coupling propulsion device (2) is powered by the coupling control device (4) and the variable frequency speed regulation device (5) at the same time. The magnetic coupling propulsion device (2) absorbs mechanical energy from the prime mover for propulsion (3) and also absorbs electrical energy from the variable frequency speed regulation device (5), driving the thruster (1) to rotate, realizing the alternating and combined operation of electric propulsion and mechanical propulsion; Under medium-speed conditions, when the variable frequency speed regulation device (5) is not working, the magnetic coupling propulsion device (2) is powered by the coupling control device (4). The magnetic coupling propulsion device (2) only absorbs mechanical energy from the prime mover for propulsion (3), driving the thruster (1) to rotate, realizing mechanical propulsion operation; Under low-speed conditions, when the prime mover for propulsion (3) is not working, the magnetic coupling propulsion device (2) is powered by the variable frequency speed regulation device (5). The magnetic coupling propulsion device (2) only absorbs electrical energy from the variable frequency speed regulation device (5), driving the thruster (1) to rotate, realizing electric propulsion; In the case of a fault of the generator set (7), the prime mover for propulsion (3) drives the magnetic coupling propulsion device (2) to generate electrical energy and supply power to other loads (8).

2. A novel ship hybrid propulsion system according to claim 1, characterized in that, The power winding (25) is an m-phase winding, m = 3n, n = 2, 3, 4,..., and the control winding (24) is a 3-phase winding.

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