Gas ship with an internal combustion engine power plant

Abstract

A gas ship using an internal combustion engine power plant, the gas ship being a self-propelled floating storage and regasification unit, a gas carrier, a gas filling ship or a gas transport and filling ship; the number of main propellers of the gas ship being one or more; the main engine for driving all or part of the main propellers being an internal combustion engine; the number of main engines for driving a single main propeller being one or more, and a clutch being provided between the main engine and the main propeller; a main engine-driven generator being provided on the gas ship, and one or more main engines being directly connected to the generator; the gas ship also being provided with a generator set; when the ship is sailing or at anchor, the main engine-driven generator operates in parallel with the generator set. In the present invention, an internal combustion engine is involved in driving all or part of the main propellers. In addition to driving the main propellers, the main engine can also drive the generator and can operate in parallel with the generator set on the ship to supply power to the whole ship; taking into account both a relatively high overall propulsion efficiency and a relatively small total installed power.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and particularly relates to a gas ship using an internal combustion engine power plant. Background Art

[0002] Existing gas ships, including self-propelled floating storage and regasification units, gas tankers, gas filling ships, and gas transportation and filling ships, either adopt electric propulsion or mechanical propulsion.

[0003] For a gas ship adopting an electric propulsion scheme, a common power station composed of multiple generator sets supplies power to the whole ship, and the main propeller is driven by an electric motor. The energy transfer from the prime mover to the propeller needs to pass through a generator, a switchboard, a transformer, an inverter, and an electric motor, with a complex process and the defect of relatively low overall propulsion efficiency.

[0004] For a gas ship adopting a mechanical propulsion scheme, the main propeller is driven by an internal combustion engine (main engine). Although the propulsion efficiency is much higher than that of electric propulsion, since the main engine only drives the propeller and additional generator sets are required to meet the power needs of the whole ship, there is a defect of a relatively large total installed power. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above defects existing in the prior art and provide a gas ship using an internal combustion engine power plant.

[0006] The present invention solves the above technical problem through the following technical solutions:

[0007] A gas ship using an internal combustion engine power plant, wherein the gas ship is a self-propelled floating storage and regasification unit, a gas tanker, a gas filling ship, or a gas transportation and filling ship; the number of main propellers of the gas ship is one or more; the main engine for driving all or part of the main propellers is an internal combustion engine; the number of main engines for driving a single main propeller is one or more, and a clutch is provided between the main engine and the main propeller; a main engine-driven generator is provided on the gas ship, and one or more main engines are directly connected to the generator; the gas ship is also provided with a generator set; when the ship is sailing or berthed, the main engine-driven generator operates in parallel with the generator set.

[0008] Through the engagement and disengagement of the clutch, the main engine has a working mode of only driving the main propeller, a working mode of only driving the generator, and a working mode of driving both the main propeller and the generator simultaneously.

[0009] A gear reduction mechanism is provided between the main engine and the main propeller driven by the main engine.

[0010] The gear reduction mechanism is a gearbox.

[0011] The gear reduction mechanism is a gear reduction device provided inside the main propeller.

[0012] The clutch is arranged inside the gear reduction mechanism.

[0013] The clutch is arranged outside the gear reduction mechanism.

[0014] The main engine and the generator driven by the main engine have the same rotational speed and direction of rotation.

[0015] The gas ship is provided with a main switchboard for providing a power interface for the ship's electrical loads, and the generator and the generator sets are respectively connected to the main switchboard.

[0016] There are multiple generator sets.

[0017] The beneficial effects of the present invention are as follows: In the present invention, the internal combustion engine (main engine) participates in driving all or part of the main propellers. In addition to driving the main propellers, the main engine can also drive the generator and can operate in parallel with the generator sets on the ship for a long time to supply power to the whole ship. Compared with the existing self-propelled floating storage and regasification units, gas carriers, gas filling ships or gas transport and filling ships, the present invention takes into account both a relatively high overall propulsion efficiency and a relatively small total installed power. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the first configuration of the main propeller driven by an internal combustion engine according to a preferred embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of the second configuration of the main propeller driven by an internal combustion engine according to a preferred embodiment of the present invention.

[0020] Figure 3 It is a schematic diagram of the third configuration of the main propeller driven by an internal combustion engine according to a preferred embodiment of the present invention.

[0021] Figure 4 It is a schematic diagram of the first configuration of the ship power plant according to a preferred embodiment of the present invention.

[0022] Figure 5 It is a schematic diagram of the second configuration of the ship power plant according to a preferred embodiment of the present invention.

[0023] Figure 6 It is a schematic diagram of the third configuration of the ship power plant according to a preferred embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] The following is a preferred embodiment and is described in more clearly and completely in conjunction with the accompanying drawings to illustrate the present invention.

[0025] A gas ship using an internal combustion engine power plant, the gas ship being a self-propelled floating storage and regasification unit, a gas carrier, a gas filling ship or a gas transport and filling ship.

[0026] The number of main propellers of the gas ship is one or more; the main engine for driving all or part of the main propellers is an internal combustion engine; the number of main engines for driving a single main propeller is one or more, and a clutch is provided between the main engine and the main propeller.

[0027] A main engine-driven generator is provided on the gas ship, and one or more main engines are directly connected to the generator.

[0028] A fuel-driven generator set is also provided on the gas ship. There are multiple generator sets.

[0029] The main engine-driven generator and the generator set are connected in a parallel operation mode.

[0030] Specifically, when the ship is sailing or at anchor, the main engine-driven generator and the generator set operate in parallel to supply power to the whole ship.

[0031] That is to say, when the ship is sailing or at anchor, the main engine-driven generator and the generator set are connected in a parallel operation mode.

[0032] Through the disengagement and engagement of the clutch, the main engine has a working mode of only driving the main propeller, only driving the generator, and simultaneously driving the main propeller and the generator.

[0033] A gear reduction mechanism is provided between the main engine and the main propeller driven by the main engine. In this embodiment, the gear reduction mechanism is a gearbox.

[0034] The clutch is provided inside the gearbox; or, the clutch is provided outside the gearbox.

[0035] In other embodiments, the gear reduction mechanism is a gear reduction device provided inside the main propeller. The gear reduction device is a common existing device and will not be elaborated here.

[0036] In this embodiment, the main engine and the main engine-driven generator have the same rotational speed and rotation direction.

[0037] A main switchboard for providing a power supply interface for the ship's electrical load is provided on the gas ship, and the generator and the generator set are respectively connected to the main switchboard.

[0038] Through the disengagement and engagement of the clutch, the main engine has three working modes:

[0039] First, only drive the main propeller;

[0040] Second, only drive the generator;

[0041] Third, simultaneously drive the main propeller and the generator.

[0042] In the present invention, there are multiple specific working schemes.

[0043] Configuration of the main propeller driven by an internal combustion engine. A typical solution can be as follows:

[0044] Solution 1: As Figure 1 shown, there is one main propeller 11, two main engines 12, and one gearbox 13. Both main engines 12 are connected to this gearbox; one main engine-driven generator 14 is connected to each main engine. There are two clutches 15 in the gearbox 13, and each main engine is connected to one clutch respectively.

[0045] Solution 2: As Figure 2 shown, there is one main propeller 21, two main engines 22, and one gearbox 23. Both main engines 22 are connected to this gearbox 23; there is only one main engine-driven generator 24, and this main engine-driven generator 24 is connected to one main engine. There are two clutches 25 in the gearbox 23, and each main engine 22 is connected to one clutch 25 respectively.

[0046] Solution 3: As Figure 3 shown, there is one main propeller 31, one main engine 32, one gearbox 33, and one main engine-driven generator 34. This main engine-driven generator 34 is connected to the main engine 32. There is one clutch 35 in the gearbox 33, and the main engine 32 is connected to the clutch 35.

[0047] Configuration of the ship power plant. A typical solution can be as follows:

[0048] Solution 1: As Figure 4 shown, there is one main propeller 41, two main engines 42, and one gearbox 43. Both main engines 42 are connected to this gearbox 43; one main engine-driven generator 44 is connected to each main engine 42. The generator set 46 and the ship electrical load 47 are respectively connected to the main switchboard 45. The two main engine-driven generators 44 are also connected to the main switchboard 45.

[0049] Solution 2: As Figure 5As shown in the figure, there are three main thrusters, namely the left main thruster 51, the middle main thruster 52, and the right main thruster 53; there are two main engines, namely the left main engine 54 and the right main engine 55; there are two gearboxes, namely the left gearbox 56 and the right gearbox 57; there are two main engine-driven generators, namely the left main engine-driven generator 58 and the right main engine-driven generator 59; the left main engine 54 and the left main thruster 51 are connected through the left gearbox 56, and the left main engine-driven generator 58 is connected to the left main engine 54; the right main engine 55 and the right main thruster 53 are connected through the right gearbox 57, and the right main engine-driven generator 59 is connected to the right main engine 55; the middle main thruster 52 is connected with a drive motor 63 for driving the middle main thruster. The ship's generating set 61 and the ship's electrical load 62 are respectively connected to the main switchboard 60. The left main engine-driven generator 58 and the right main engine-driven generator 59 are respectively connected to the main switchboard 60. The drive motor 63 is connected to the main switchboard 60.

[0050] Solution three: As Figure 6 shown in the figure, there are two main thrusters, namely the left main thruster 75 and the right main thruster 76; there are four main engines, namely the first main engine 71, the second main engine 72, the third main engine 73, and the fourth main engine 74; there are two gearboxes, namely the left gearbox 77 and the right gearbox 78; there are two main engine-driven generators, namely the first main engine-driven generator 79 and the fourth main engine-driven generator 80; the first main engine-driven generator 79 is connected to the first main engine 71, and the fourth main engine-driven generator 80 is connected to the fourth main engine 74; the first main engine 71 and the second main engine 72 are simultaneously connected to the left gearbox 77, and the left main thruster 75 is connected to the left gearbox 77; the third main engine 73 and the fourth main engine 74 are simultaneously connected to the right gearbox 78, and the right main thruster 76 is connected to the right gearbox 78; a left propulsion motor 84 for driving the left thruster is also connected to the left gearbox 77; a right propulsion motor 85 for driving the right thruster is also connected to the right gearbox 78. The left propulsion motor 84 and the right propulsion motor 85 are respectively connected to the main switchboard 81. The generating set 82 and the ship's electrical load 83 are respectively connected to the main switchboard 81. The first main engine-driven generator 79 and the fourth main engine-driven generator 80 are respectively connected to the main switchboard 81.

[0051] In the present invention, an internal combustion engine (main engine) is involved in driving all or part of the main thrusters. In addition to driving the main thrusters, the main engine can also drive generators and can operate in parallel with the ship's generating set for a long time to supply power to the whole ship. Compared with the existing self-propelled floating storage and regasification unit, gas carrier, gas filling ship, or gas transportation and filling ship, the present invention takes into account both a relatively high overall propulsion efficiency and a relatively small total installed power.

[0052] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A gas ship using an internal combustion engine power plant, characterized in that, The gas carrier is a self-propelled floating storage and regasification unit, a gas tanker, a gas filling ship or a gas transport and filling ship; the number of main propellers of the gas carrier is one or more; the main engine for driving all or part of the main propellers is an internal combustion engine; the number of main engines for driving a single main propeller is one or more, and a clutch is provided between the main engine and the main propeller; a main engine-driven generator is provided on the gas carrier, and one or more main engines are directly connected to the generator; the gas carrier is also provided with a generator set; when the ship is sailing or at anchor, the main engine-driven generator operates in parallel with the generator set; through the disengagement and engagement of the clutch, the main engine has a working mode of only driving the main propeller, only driving the generator, and simultaneously driving the main propeller and the generator; a gear reduction mechanism is provided between the main engine and the main engine-driven main propeller; the main engine and the main engine-driven generator have the same rotational speed and rotation direction.

2. The gas ship using an internal combustion engine power device according to claim 1, characterized in that, The gear reduction mechanism is a gearbox.

3. The gas ship using an internal combustion engine power plant as claimed in claim 1, wherein The gear reduction mechanism is a gear reduction device provided inside the main propeller.

4. The gas ship with an internal combustion engine power plant as claimed in claim 1, characterized in that, The clutch is provided inside the gear reduction mechanism.

5. The gas ship using an internal combustion engine power plant as claimed in claim 1, characterized in that, The clutch is provided outside the gear reduction mechanism.

6. The gas ship using an internal combustion engine power plant as claimed in claim 1, characterized in that, A main switchboard for providing a power interface for the ship's electrical load is provided on the gas carrier, and the generator and the generator set are respectively connected to the main switchboard.

7. The gas ship using an internal combustion engine power plant as claimed in claim 1, characterized in that, There are multiple generator sets.

Images