A trimaran

Abstract

The present invention provides a trimaran, wherein the trimaran comprises a main hull, a first auxiliary hull and a second auxiliary hull, wherein the first auxiliary hull and the second auxiliary hull are respectively arranged on both sides of the main hull, the main hull is provided with an engine room, and a power system is arranged in the engine room; the first auxiliary hull and the second auxiliary hull are both made of polyethylene material; or, the first auxiliary hull and the second auxiliary hull both comprise a metal frame structure and a polyethylene protective layer wrapping the metal frame structure. In the present invention, since the polyethylene material has the characteristics of a large elastic modulus and a strong impact absorption ability, the impact resistance of the hull can be improved, and the safety of the trimaran is improved. In addition, since the density of the polyethylene material is smaller than that of water, the weight of the hull is lighter, and the waterline of the trimaran can be reduced, which is beneficial to reducing the sailing resistance of the trimaran and improving the sailing speed of the trimaran.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and in particular to a trimaran. Background Art

[0002] As the demand for logistical transportation in modern warfare increases, civilian transport ships play an increasingly important role in logistical transportation in modern warfare. Therefore, their living environment is also facing more and more serious threats, and they are often threatened by weapons such as torpedoes, mines, and depth charges. This requires enhancing the protection capabilities of transport ships. At present, military combat ships generally adopt the method of setting up protective structures on the side, which can effectively protect the internal structure of the hull, electronic equipment, mechanical equipment, etc. from damage and ensure the normal activities of personnel on the transport ship.

[0003] However, for civil transport ships, adding protective structures will increase the weight of the hull, causing the center of gravity of the hull to change, which will have an adverse effect on the stability and speed of the ship's navigation; moreover, the protective structure will occupy the space in the original cabin and destroy the overall layout; in addition, the installation of side protective structures will significantly increase the manufacturing cost of the ship. Summary of the invention

[0004] The present invention provides a trimaran to solve the above problems.

[0005] In a first aspect, the present invention provides a trimaran, comprising a main hull, a first secondary hull and a second secondary hull, wherein the first secondary hull and the second secondary hull are respectively arranged on both sides of the main hull, the main hull is provided with an engine room, and a power system is arranged in the engine room;

[0006] The first sub-hull and the second sub-hull are both made of polyethylene material; or,

[0007] The first sub-hull and the second sub-hull each include a metal frame structure and a polyethylene protective layer wrapping the metal frame structure.

[0008] In a second aspect, the present invention provides another trimaran, comprising a main hull, a first secondary hull and a second secondary hull, wherein the main hull is provided with an engine room, wherein a power system is provided in the engine room, and the power source of the power system is a gas turbine engine;

[0009] A pressure cabin is also provided at the bottom of the main hull. The bottom of the pressure cabin has a plurality of injection holes. The pressure cabin is connected to the exhaust pipe of the gas turbine engine. A one-way valve is provided between the exhaust pipe and the pressure cabin.

[0010] In the present invention, by providing a secondary hull made of polyethylene material, the impact resistance of the hull can be improved due to the characteristics of polyethylene material such as large elastic modulus and strong impact absorption ability, so that the trimaran can prevent damage from underwater attack weapons such as torpedoes, mines, depth charges, etc., thereby improving the safety of the trimaran. In addition, since the density of polyethylene material is smaller than that of water, the weight of the hull is lighter, and the draft line of the trimaran can be lowered, which is beneficial to reducing the sailing resistance of the trimaran and improving the sailing speed of the trimaran. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0012] Figure 1 A schematic diagram of the three-dimensional structure of a trimaran provided by an embodiment of the present invention;

[0013] Figure 2 A top view of a trimaran provided by an embodiment of the present invention;

[0014] Figure 3 For along Figure 2 Sectional view along line AA;

[0015] Figures 4 to 5 A half-section schematic diagram of the trimaran of the present invention viewed from the stern to the bow;

[0016] Figure 6 A schematic diagram of the main engine power system of a trimaran provided in an embodiment of the present invention;

[0017] Figure 7 A schematic structural diagram of a gas turbine generator set of a trimaran provided in an embodiment of the present invention;

[0018] Figure 8 A schematic diagram of supercavitation formed in front of a trimaran hull provided by an embodiment of the present invention;

[0019] Figures 9 to 29 A schematic diagram of the layout of the rotor system of a gas turbine generator set of a trimaran provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] 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 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.

[0021] Embodiment 1

[0022] like Figures 1 to 5 As shown, an embodiment of the present invention provides a trimaran 10, including a main hull 100, a first secondary hull 110 and a second secondary hull 120, wherein the first secondary hull 110 and the second secondary hull 120 are arranged on both sides of the main hull 100, the main hull 100 is provided with a cabin 150, and a power system 160 is arranged in the cabin 150.

[0023] The first auxiliary hull 110 and the second auxiliary hull 120 may be symmetrically distributed on both sides of the main hull 100 to improve the stability of the trimaran. The trimaran 10 may also include a deck 130 and a cockpit 140. The first auxiliary hull 110, the main hull 100 and the second auxiliary hull 120 may be arranged below the deck 130 to jointly support the deck 130, and the cockpit 140 may be located above the deck 130. In this way, the main hull and the two auxiliary hulls can jointly support a wider deck, further improving the stability of the trimaran.

[0024] In order to improve the safety of the trimaran and prevent it from being damaged by underwater attack weapons such as torpedoes, mines, and depth charges, it is necessary to improve the impact resistance of the hull. Since high molecular polyethylene has the characteristics of large elastic modulus and strong impact absorption ability, the hull of the trimaran can be made of polyethylene material.

[0025] As an embodiment, the first hull 110 and the second hull 120 are both made of polyethylene material, such as Figure 4 shown.

[0026] When the trimaran is attacked by weapons, the polyethylene material transmits the impact energy to areas outside the impact point, thereby absorbing the impact energy. Therefore, the auxiliary hull can play a good protective role for the main hull 100, and can protect the power system 160 in the main hull 100 from being damaged by underwater attack weapons such as torpedoes, mines, depth charges, etc., thereby improving the safety of the trimaran 10. Even if it encounters a more intense torpedo attack, the first auxiliary hull 110 or the second auxiliary hull 120 is hit and blown up, and separated from the trimaran 10, it will not damage the main hull 100 and its internal power system 160, thereby ensuring the safety of the ship.

[0027] In addition, the density of polyethylene material is smaller than that of water. The sub-hull is made of polyethylene, which will not increase the weight of the hull too much, and will not change the waterline of the hull and the stability and speed of the ship. It also has a certain buoyancy ability for the deck 130, which can improve the stability of the sub-hull supporting the deck 130.

[0028] In addition, polyethylene material has strong corrosion resistance and will not be corroded by seawater even when sailing on the sea for a long time.

[0029] As another embodiment, the first hull 110 and the second hull 120 both include a metal frame structure (111, 121) and a polyethylene protective layer (112, 122) wrapping the metal frame structure (111, 121). Figure 5 shown.

[0030] For the auxiliary hulls provided with metal frame structures (111, 121), since the weight of the metal frame structures (111, 121) is relatively large, the provision of the metal frame structures (111, 121) improves the stability and stability of both sides of the main hull 100. The auxiliary hulls made of polyethylene material as a whole have a light weight, a lowered waterline, and a small sailing resistance, which is conducive to improving the sailing speed of the ship. Therefore, the specific settings of the first auxiliary hull 110 and the second auxiliary hull 120 can be specifically designed according to the sailing environment and performance requirements of the ship.

[0031] As another embodiment, a polyethylene protective layer 101 is provided on the outer surface of the main hull 100. Optionally, a polyethylene protective layer 101 is provided below the waterline of the main hull 100, especially a polyethylene protective layer 101 is provided on the outer surface of the main hull 100 where the power system 160 is installed, so as to further protect the power system 160.

[0032] It can be seen that in the embodiment of the present invention, by providing a secondary hull made of polyethylene material, the impact resistance of the hull can be improved due to the characteristics of polyethylene material such as large elastic modulus and strong impact absorption ability, so that the trimaran can prevent damage from underwater attack weapons such as torpedoes, mines, and depth charges, thereby improving the safety of the trimaran. In addition, since the density of polyethylene material is smaller than that of water, the weight of the hull is lighter, and the draft of the trimaran can be reduced, which is conducive to reducing the sailing resistance of the trimaran and increasing the sailing speed of the trimaran.

[0033] In the embodiment of the present invention, the power system 160 may include a main engine power system 161 and an auxiliary engine power system 162. The main engine power system 161 may be arranged at the middle and rear part of the main hull 100, and the energy generated by the main engine power system 161 may be used to provide the main power for the whole ship to sail; the auxiliary engine power system 162 may be arranged at the front part of the main hull 100, and the energy generated by the auxiliary engine power system 162 may be used to provide the necessary electrical energy for the ship and drive other auxiliary equipment on the ship, such as air conditioners, water pumps, oil pumps, etc.

[0034] At least one of the main engine power system 161 and the auxiliary engine power system 162 may use a gas turbine engine as a power source. The following is a specific description using the main engine power system 161 using a gas turbine engine as a power source as an example.

[0035] like Figure 6 As shown, the host power system 161 includes:

[0036] The gas turbine generator set 170 includes a gas turbine engine 1701 and a motor 1702. The gas turbine engine 1701 is connected to the motor 1702. The gas turbine engine 1701 can drive the motor 1702 to generate electricity.

[0037] The motor 172 is electrically connected to the motor 1702, and the electric energy generated by the motor 1702 can be input into the motor 172 to drive the motor 172 to operate;

[0038] The propulsion system 173 is connected to the electric motor 172 . The propulsion system 173 is also connected to the gas turbine engine 1701 . The propulsion system 173 can be driven by the electric motor 172 and / or the gas turbine engine 1701 .

[0039] Through the above arrangement, the gas turbine engine 1701 can provide power for the navigation of the trimaran 10 in two ways, one is that the shaft power output by the gas turbine engine 1701 is directly used to drive the propulsion system 173, and the other is that the shaft power of the gas turbine engine 1701 is converted into electrical energy and then further drives the propulsion system 173 through the motor 172. These two ways can be carried out simultaneously or separately, so that the engine can work under a relatively stable working condition.

[0040] Optionally, the host power system 161 further includes an energy storage system 174 , and the energy storage system 174 is electrically connected to the motor 172 and the motor 1702 , respectively;

[0041] The electric energy generated by the motor 1702 may be input to the energy storage system 174 , and the electric energy stored in the energy storage system 174 may be input to the electric motor 172 .

[0042] Through the above arrangement, the energy generated by the gas turbine generator set 170 can be used as the power for the trimaran 10 to sail, and the excess shaft work it generates can also be used for power generation. The generated electric energy can be used to drive the propulsion system 173, thereby driving the trimaran 10 forward, and the excess electric energy can also be stored in the energy storage system 174. The stored electric energy can be used as an auxiliary power source for the trimaran 10 or provide emergency main power for the trimaran 10 when the gas turbine generator set 170 is abnormal.

[0043] Since the shaft power output by the gas turbine engine 1701 can be utilized in two ways, when the trimaran 10 is in different working conditions, it is only necessary to reasonably distribute the shaft power output by the gas turbine engine 1701 to the propulsion system 173 and the energy storage system 174, without changing the total power output by the gas turbine engine 1701. For example, when the trimaran 10 needs to travel at full speed with maximum power, all the shaft power output by the gas turbine generator set 170 can be used to directly drive the propulsion system 173, without generating electricity through the motor 1702; and when the trimaran 10 travels slowly or even temporarily stops, part or all of the shaft power output by the gas turbine engine 1701 can be used to drive the motor 1702 to generate electricity, and the generated electric energy is stored in the energy storage system 174 for auxiliary power or emergency power of the trimaran 10. In this way, under any working condition, the gas turbine engine 1701 can work at a stable rated power, which is conducive to improving the stability and service life of the gas turbine engine 1701, and is also conducive to the full combustion of fuel and improving energy utilization.

[0044] Optionally, the host power system 161 also includes a current converter 171, which is used for converting between AC and DC power. The current converter 171 is arranged between the motor 1702 and the energy storage system 174, and between the motor 1702 and the motor 172. The motor 1702 is electrically connected to the motor 172 and the energy storage system 174 respectively through the current converter 171.

[0045] Optionally, the motor 1702 is an integrated motor, and the motor 1702 can be used as a generator or a motor. When the gas turbine engine 1701 is started, the electric energy stored in the energy storage system 174 can be input into the motor 1702, so that the motor 1702 drives the gas turbine engine 1701 as a motor. When the gas turbine engine 1701 is started and enters a normal working state, the motor 1702 is used as a generator, and is driven by the gas turbine engine 1701 to generate electricity.

[0046] like Figure 7As shown, the gas turbine engine 1701 may include a compressor 180, a turbine 181 and a combustion chamber 183. The motor 1702, the compressor 180 and the turbine 181 are connected through a rotating shaft 182. The motor 1702, the compressor 180 and the turbine 181 are installed on the rotating shaft 182 in sequence, and the combustion chamber 183 is arranged between the compressor 180 and the turbine 181.

[0047] The air inlet of the compressor 180 is connected to an air intake device (not shown in the figure) provided on the trimaran 10 .

[0048] Optionally, the rotating shaft 182 is connected to the propulsion system 173 via a transmission speed regulating device 184 .

[0049] The working process of the gas turbine generator set 170 is as follows: air enters the compressor 180 through the air intake device and is compressed into high-pressure air. The high-pressure air is supplied to the combustion chamber 183 and mixed with the fuel to burn. The high-temperature and high-pressure combustion gas generated by it expands and does work in the turbine 181. The turbine 181 drives the rotating shaft 182 to rotate, and the rotating shaft 182 drives the motor 1702 to generate electricity, and / or drives the propulsion system 173 to work through the transmission speed control device 184, thereby providing the main power for the navigation of the trimaran 10.

[0050] On the premise that the main engine power system 161 adopts the gas turbine engine 1701 as the engine, the trimaran 10 of the embodiment of the present invention can use the exhaust gas of the gas turbine engine 1701 as the source of the pressure gas, thereby making it into a supercavitating trimaran.

[0051] like Figure 3 As shown, a pressure cabin 102 is also provided at the bottom of the main hull 100, and a plurality of jet holes are provided at the bottom 103 of the pressure cabin 102. The pressure cabin 102 is connected to the exhaust pipe of the gas turbine engine 1701 in the main engine power system 161, and a one-way valve 175 is provided between the exhaust pipe and the pressure cabin 102. The one-way valve 175 allows the pressurized gas discharged from the gas turbine engine 1701 to enter the pressure cabin 102, but does not allow the pressurized gas to flow in reverse or the seawater to flow from the pressure cabin 102 into the exhaust pipe of the gas turbine engine 1701.

[0052] The bottom 103 of the pressure cabin 102 may be made of porous materials, foamed aluminum alloys or foamed magnesium alloys.

[0053] When the ship needs to sail at a particularly high speed, the exhaust of the gas turbine engine 1701 is controlled to inject pressurized gas into the pressure cabin 102. The pressurized gas entering the pressure cabin 102 is ejected outward through the ejection holes of the cabin bottom 103, forming a supercavitation environment along the bottom and front of the main hull 100. The generation of cavitation forms an air film between the hull and the water, which can greatly reduce the resistance of the seawater to the hull, thereby greatly increasing the speed of the ship, that is, forming a supercavitation trimaran, such as Figure 8 shown.

[0054] In this way, the working process of the gas turbine generator set 170 is as follows: air enters the compressor 180 through the air intake device and is compressed into high-pressure air, and the high-pressure air is supplied to the combustion chamber 183 to mix with the fuel and burn, and the high-temperature and high-pressure combustion gas generated by it expands and does work in the turbine 181, and the turbine 181 drives the rotating shaft 182 to rotate, and the rotating shaft 182 drives the motor 1702 to generate electricity, and / or drives the propulsion system 173 to work through the transmission speed regulating device 184, thereby providing the main power for the navigation of the trimaran 10. At the same time, the pressurized gas discharged from the turbine 181 is injected into the pressure cabin 102 as a pressure gas source, and the pressurized gas forms a supercavitation environment in front of and near the hull through the bottom of the cabin 103, thereby reducing the navigation resistance of the trimaran 10.

[0055] Optionally, the exhaust duct of the gas turbine engine is provided with a booster device (not shown in the figure), which is used to increase the pressure of the gas entering the pressure chamber, thereby facilitating the formation of a supercavitation environment at the bottom and front of the main hull 100.

[0056] It should be noted that, since the auxiliary power system 162 may also use a gas turbine engine as an engine, the pressure gas that forms supercavitation may also come from the exhaust gas of the gas turbine engine of the auxiliary power system 162. The specific principle is the same as that of the main power system 161, and will not be described here to avoid repetition.

[0057] Through the above arrangement, the trimaran 10 of the embodiment of the present invention not only has the ability to prevent underwater weapon attacks and has high safety performance compared to ordinary trimarans, but also uses the pressurized exhaust gas discharged by the gas turbine engine 1701 to form supercavitation in the front part and vicinity of the main hull 100, thereby greatly improving the driving speed of the trimaran 10.

[0058] In addition, considering the smoothness of the trimaran 10, the stability of the rotor system can be improved by reasonably setting the positions of the main components in the rotor system of the gas turbine engine unit 170, thereby improving the smoothness of the sailing of the trimaran 10.

[0059] Among them, the rotating shaft 182, the motor 1702, the compressor 180 and the turbine 181 form a rotor system of the gas turbine generator set;

[0060] The shaft body of the rotating shaft 182 is an integrated structure, and the rotating shaft 182 is arranged horizontally;

[0061] The rotating shaft 182 is also provided with a thrust bearing 500 and at least two radial bearings, and the thrust bearing 500 and the at least two radial bearings are non-contact bearings;

[0062] The thrust bearing 500 is arranged at a preset position on a side of the turbine 181 close to the compressor 180, and the preset position is a position that enables the center of gravity of the rotor system to be located between two radial bearings that are farthest apart from each other among at least two radial bearings.

[0063] In order to keep the entire rotor system stable even when rotating at high speed, the center of gravity of the entire rotor system should be located between the two radial bearings that are farthest apart from each other among the at least two radial bearings. In this way, the entire rotor system forms a spindle structure, which improves the stability of the entire rotor system.

[0064] In an embodiment of the present invention, the setting position of the thrust bearing can be flexibly adjusted based on parameters such as the number of radial bearings of the at least two radial bearings, the setting position of each radial bearing, and the mass of each component in the entire rotor system (including the mass of the thrust bearing itself), so that the center of gravity of the entire rotor system is located between the two radial bearings that are farthest apart. Preferably, the center of gravity of the entire rotor system is located on the compressor 180.

[0065] The above rotor system can be used Figures 9 to 26 The structure shown.

[0066] like Figures 9 to 11 As shown, the rotor system includes:

[0067] The rotating shaft 182 has an integral structure and is disposed horizontally;

[0068] The motor 1702, the compressor 180 and the turbine 181 are sequentially arranged on the rotating shaft 182;

[0069] In addition, a thrust bearing 500 , a first radial bearing 600 , and a second radial bearing 700 are arranged on the rotating shaft 182 , the first radial bearing 600 is arranged on the side of the motor 1702 away from the compressor 180 , and the second radial bearing 700 is arranged between the compressor 180 and the turbine 181 .

[0070] The thrust bearing 500 is disposed between the first radial bearing 600 and the motor 1702. Fig. 9 Alternatively, the thrust bearing 500 is disposed on the side of the first radial bearing 600 away from the motor 1702, as shown Fig.10Alternatively, the thrust bearing 500 is disposed between the motor 1702 and the compressor 180, as shown Fig.11 shown.

[0071] When the mass of the turbine 181 is large, for example, the material of the turbine 181 is metal, in order to make the center of gravity of the entire rotor system located between the first radial bearing 600 and the second radial bearing 700, the following method can be used: Fig. 9 or Fig.10 The embodiment shown.

[0072] When the mass of the turbine 181 is relatively small, for example, the material of the turbine 181 is a ceramic material or a ceramic fiber composite material, in order to make the center of gravity of the entire rotor system located between the first radial bearing 600 and the second radial bearing 700, the following method can be used: Fig.11 The embodiment shown.

[0073] It should be noted that for Fig.11 In the embodiment shown, since the thrust bearing 500 is disposed between the motor 1702 and the compressor 180, in order to prevent the thrust plate of the thrust bearing 500 from blocking the air inlet of the compressor 180, Figure 7 The illustrated embodiment is suitable for a thrust bearing 500 having a smaller thrust plate diameter.

[0074] Taking into account the development demand for high speed of gas turbines or gas turbine generator sets, in order to improve the working performance of thrust bearings and radial bearings, in an embodiment of the present invention, the thrust bearing 500 can adopt an air-magnetic hybrid thrust bearing, and the first radial bearing 600 can adopt an air-magnetic hybrid radial bearing or a gas dynamic and static pressure hybrid radial bearing.

[0075] In addition, since the second radial bearing 700 is close to the turbine 181 , and considering that the magnetic components in the magnetic bearing cannot withstand the high temperature transmitted from the turbine 181 , the second radial bearing 700 can adopt a gas dynamic and static pressure hybrid radial bearing.

[0076] As another embodiment, the second radial bearing 700 may also be a gas-magnetic hybrid radial bearing, in which case the magnetic component of the second radial bearing 700 is disposed on an area of ​​the second radial bearing 700 that is away from the turbine 181. In other words, no magnetic component is disposed on an area of ​​the second radial bearing 700 that is close to the turbine 181.

[0077] To protect the magnetic components on the second radial bearing 700, it can be achieved by reducing the heat energy radiated from the turbine 181 to the second radial bearing 700. Specifically, a heat insulation layer (not shown in the figure) is provided on one side of the turbine 181 close to the second radial bearing 700. Here, the material of the heat insulation layer can be aerogel or other materials with good heat insulation performance.

[0078] Figure 12 to Figure 14 They are shown respectively Figures 9 to 11 Schematic diagram of a magnetic component being arranged in an area of ​​the second radial bearing 700 away from the turbine 181.

[0079] The compressor 180 may be a centrifugal compressor 180, and the turbine 181 may be a centrifugal turbine; the motor 1702 may be a hydrodynamic bearing motor, and the portion of the rotating shaft 182 corresponding to the bearing of the motor 1702 may be provided with a first dynamic pressure generating groove 201.

[0080] like Figures 15 to 18 As shown, the rotor system includes:

[0081] The rotating shaft 182 has an integral structure and is disposed horizontally;

[0082] The motor 1702, the compressor 180 and the turbine 181 are sequentially arranged on the rotating shaft 182;

[0083] In addition, a thrust bearing 500, a first radial bearing 600, a second radial bearing 700 and a third radial bearing 800 are arranged on the rotating shaft 182, the first radial bearing 600 is arranged on the side of the motor 1702 away from the compressor 180, the second radial bearing 700 is arranged between the compressor 180 and the turbine 181, and the third radial bearing 800 is arranged between the motor 1702 and the compressor 180.

[0084] The thrust bearing 500 is disposed between the first radial bearing 600 and the motor 1702. Fig.15 Alternatively, the thrust bearing 500 is disposed on the side of the first radial bearing 600 away from the motor 1702, as shown Fig.16 Alternatively, the thrust bearing 500 is disposed between the motor 1702 and the compressor 180, as shown Fig.17 or Fig.18 shown.

[0085] Since the third radial bearing 800 is added, when the thrust bearing 500 is disposed between the motor 1702 and the compressor 180, the thrust bearing 500 can be disposed between the motor 1702 and the third radial bearing 800. Fig.17 As shown; the thrust bearing 500 can be disposed between the third radial bearing 800 and the compressor 180, as Fig.18 shown.

[0086] By adding a third radial bearing 800 between the motor 1702 and the compressor 180, the stability of the entire rotor system can be further improved.

[0087] In an embodiment of the present invention, the thrust bearing 500 can adopt an air-magnetic hybrid thrust bearing, and the first radial bearing 600 can adopt an air-magnetic hybrid radial bearing or a gas dynamic and static pressure hybrid radial bearing; since the second radial bearing 700 is close to the turbine 181, considering that the magnetic components contained in the magnetic bearing cannot withstand the high temperature transmitted from the turbine 181, the second radial bearing 700 can adopt a gas dynamic and static pressure hybrid radial bearing.

[0088] As another embodiment, the second radial bearing 700 may also be a gas-magnetic hybrid radial bearing, in which case the magnetic component of the second radial bearing 700 is disposed on an area of ​​the second radial bearing 700 that is away from the turbine 181. In other words, no magnetic component is disposed on an area of ​​the second radial bearing 700 that is close to the turbine 181.

[0089] To protect the magnetic components on the second radial bearing 700, it can be achieved by reducing the heat energy radiated from the turbine 181 to the second radial bearing 700. Specifically, a heat insulation layer (not shown in the figure) is provided on one side of the turbine 181 close to the second radial bearing 700. Here, the heat insulation layer can be aerogel or other materials.

[0090] Figures 19 to 22 They are shown respectively Figures 15 to 18 Schematic diagram of a magnetic component being arranged in an area of ​​the second radial bearing 700 away from the turbine 181.

[0091] like Fig.23 As shown, the rotor system includes:

[0092] The rotating shaft 182 has an integral structure and is disposed horizontally;

[0093] The motor 1702, the compressor 180 and the turbine 181 are sequentially arranged on the rotating shaft 182;

[0094] In addition, a thrust bearing 500, a first radial bearing 600, a second radial bearing 700 and a fourth radial bearing 900 are arranged on the rotating shaft 182, the first radial bearing 600 is arranged on the side of the motor 1702 away from the compressor 180, the second radial bearing 700 is arranged between the compressor 180 and the turbine 181, the fourth radial bearing 900 is arranged on the side of the turbine 181 away from the compressor 180, and the thrust bearing 500 is arranged between the compressor 180 and the second radial bearing 700.

[0095] The embodiment of the present invention can be applicable to the situation where the mass of the motor 1702 is too large. When the mass of the motor 1702 is too large, in order to maintain the stability of the rotor system, radial bearings (i.e., the first radial bearing 600 and the fourth radial bearing 900) need to be provided at both ends of the rotor system, and the thrust bearing 500 needs to be moved toward one side of the turbine 181.

[0096] Considering the high temperature of the turbine 181, when the thrust bearing 500 adopts a gas-magnetic hybrid thrust bearing, since the magnetic components in the magnetic bearing cannot withstand the high temperature transmitted from the turbine 181, the thrust bearing 500 can be arranged between the compressor 180 and the second radial bearing 700. Accordingly, the second radial bearing 700 can adopt a gas dynamic and static pressure hybrid radial bearing.

[0097] Generally, the temperature of the turbine 181 on the side close to the fourth radial bearing 900 is higher than the temperature of the turbine 181 on the side close to the second radial bearing 700. Therefore, the fourth radial bearing 900 preferably adopts a gas dynamic and static pressure mixed radial bearing.

[0098] As another embodiment, the second radial bearing 700 may also be a gas-magnetic hybrid radial bearing, in which case the magnetic component of the second radial bearing 700 is disposed on an area of ​​the second radial bearing 700 that is away from the turbine 181. In other words, no magnetic component is disposed on an area of ​​the second radial bearing 700 that is close to the turbine 181.

[0099] To protect the magnetic components on the second radial bearing 700, it can be achieved by reducing the heat energy radiated from the turbine 181 to the second radial bearing 700. Specifically, a heat insulation layer (not shown in the figure) is provided on one side of the turbine 181 close to the second radial bearing 700. Here, the heat insulation layer can be aerogel or other materials.

[0100] Fig.24 Shows Fig.23 Schematic diagram of a magnetic component being arranged in an area of ​​the second radial bearing 700 away from the turbine 181.

[0101] It should be noted that, when the mass of the motor 1702 is not too large, the thrust bearing 500 can be disposed between the first radial bearing 600 and the motor 1702; or, the thrust bearing 500 can be disposed on the side of the first radial bearing 600 away from the motor 1702; or, the thrust bearing 500 can be disposed between the motor 1702 and the compressor 180. Since it is easy to understand, no detailed description is given for this.

[0102] like Fig.25 As shown, the rotor system includes:

[0103] The rotating shaft 182 has an integral structure and is disposed horizontally;

[0104] The motor 1702, the compressor 180 and the turbine 181 are sequentially arranged on the rotating shaft 182;

[0105] In addition, a thrust bearing 500, a first radial bearing 600, a second radial bearing 700, a third radial bearing 800 and a fourth radial bearing 900 are arranged on the rotating shaft 182, the first radial bearing 600 is arranged on the side of the motor 1702 away from the compressor 180, the second radial bearing 700 is arranged between the compressor 180 and the turbine 181, the third radial bearing 800 is arranged between the motor 1702 and the compressor 180, the fourth radial bearing 900 is arranged on the side of the turbine 181 away from the compressor 180, and the thrust bearing 500 is arranged between the compressor 180 and the second radial bearing 700.

[0106] Adding a third radial bearing 800 between the motor 1702 and the compressor 180 can further improve the stability of the entire rotor system.

[0107] In the embodiment of the present invention, the thrust bearing 500 may be a gas-magnetic hybrid thrust bearing, and the second radial bearing 700 and the fourth radial bearing 900 may be gas dynamic-static hybrid radial bearings.

[0108] As another embodiment, the second radial bearing 700 may also be a gas-magnetic hybrid radial bearing, in which case the magnetic component of the second radial bearing 700 is disposed on an area of ​​the second radial bearing 700 that is away from the turbine 181. In other words, no magnetic component is disposed on an area of ​​the second radial bearing 700 that is close to the turbine 181.

[0109] To protect the magnetic components on the second radial bearing 700, it can be achieved by reducing the heat energy radiated from the turbine 181 to the second radial bearing 700. Specifically, a heat insulation layer (not shown in the figure) is provided on one side of the turbine 181 close to the second radial bearing 700. Here, the heat insulation layer can be aerogel or other materials.

[0110] Fig.26 Shows Fig.25 Schematic diagram of a magnetic component being arranged in an area of ​​the second radial bearing 700 away from the turbine 181.

[0111] In order to reduce the processing accuracy and assembly accuracy of the rotor system and improve the stability of the entire rotor system, the rotor system of the embodiment of the present invention can also adopt the following technical solution: all the bearings are arranged in the first casing, and the compressor and the turbine are arranged in the second casing. In this way, it is only necessary to ensure the processing accuracy of the part used to set the bearing stator in the first casing. During assembly, the part in the first casing used to connect the bearing stator can be completed through a one-time clamping process; and the impeller of the compressor and the impeller of the turbine are arranged close to each other, so that the axial length in the second casing is shortened, thereby improving the stability of the entire rotor system.

[0112] The above rotor system can also be used Figure 27 to Figure 29 The structure shown. Figure 27 to Figure 29 As shown, the rotor system includes:

[0113] The rotating shaft 182 has an integral structure and is disposed horizontally;

[0114] The motor 1702, the compressor 180, the turbine 181, the thrust bearing 500, the first radial bearing 600 and the second radial bearing 700 are arranged on the rotating shaft 182. The thrust bearing 500, the first radial bearing 600 and the second radial bearing 700 are all non-contact bearings;

[0115] And a first casing 801 and a second casing 901, the first casing 801 is connected to the second casing 901, wherein the motor 1702, the thrust bearing 500, the first radial bearing 600 and the second radial bearing 700 are all arranged in the first casing 801, the compressor 180 and the turbine 181 are both arranged in the second casing 901; the impeller of the compressor 180 and the impeller of the turbine 181 are arranged side by side in the second casing 901.

[0116] The first radial bearing 600 is disposed on a side of the motor 1702 away from the second casing 901 , and the second radial bearing 700 is disposed on a side of the motor 1702 close to the second casing 901 .

[0117] The thrust bearing 500 is disposed between the first radial bearing 600 and the motor 1702. Fig. 27 Alternatively, the thrust bearing 500 is disposed between the motor 1702 and the second radial bearing 700, as shown Fig.28 Alternatively, the thrust bearing 500 is disposed on one side of the second radial bearing 700 close to the second casing 901, as shown Fig.29 shown.

[0118] It should be noted that for Fig.29 In the embodiment shown, since the thrust bearing 500 is disposed on the side of the second radial bearing 700 close to the second casing 901, that is, the thrust bearing 500 is disposed close to the compressor in the second casing 901, in order to prevent the thrust plate of the thrust bearing 500 from blocking the air inlet of the compressor 180, Fig.29 The illustrated embodiment is suitable for a thrust bearing 500 having a smaller thrust plate diameter.

[0119] Therefore, considering the development demand of high speed of gas turbine generator sets, in order to improve the working performance of thrust bearings and radial bearings, in an embodiment of the present invention, the thrust bearing 500 can adopt an air-magnetic hybrid thrust bearing, the first radial bearing 600 can adopt an air-magnetic hybrid radial bearing or a gas dynamic and static pressure hybrid radial bearing; the second radial bearing 700 can adopt an air-magnetic hybrid radial bearing or a gas dynamic and static pressure hybrid radial bearing.

[0120] Optionally, the bearing capacity of the second radial bearing 700 is greater than the bearing capacity of the first radial bearing 600 .

[0121] In the embodiment of the present invention, generally, the weight of the motor 1702 and the thrust bearing 500 are both relatively large, and the center of gravity of the entire rotor system will be biased toward the first radial bearing 600. In view of this, increasing the bearing capacity of the second radial bearing 700 helps to improve the stability of the entire rotor system.

[0122] In an embodiment of the present invention, the compressor 180 may be a centrifugal compressor 180, and the turbine of the turbine 181 may be a centrifugal turbine; the bearing of the motor 1702 may be a fluid dynamic pressure bearing, and the portion of the rotating shaft 182 corresponding to the bearing of the motor 1702 may be provided with a first dynamic pressure generating groove 201.

[0123] Furthermore, the motor 1702 may also be an integrated motor.

[0124] In this way, at the initial startup of the rotor system, the motor 1702 can be turned on in the startup mode to rotate the rotor system. When the speed of the rotor system is increased to a preset speed, the working mode of the motor 1702 can be switched to the power generation mode.

[0125] Embodiment 2

[0126] The embodiment of the present invention also provides another trimaran, comprising a main hull, a first secondary hull and a second secondary hull, wherein the main hull is provided with an engine room, wherein a power system is provided in the engine room, and the power source of the power system is a gas turbine engine;

[0127] A pressure cabin is also provided at the bottom of the main hull. The bottom of the pressure cabin has a plurality of injection holes. The pressure cabin is connected to the exhaust pipe of the gas turbine engine. A one-way valve is provided between the exhaust pipe and the pressure cabin.

[0128] Furthermore, the implementation methods related to the impact-resistant structure and / or the structure of the power system of the trimaran in Example 1 can also be applied to the trimaran of the embodiment of the present invention and have the same beneficial effects. To avoid repetition, they are not described in detail.

[0129] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A trimaran, characterized in that: It comprises a main hull, a first secondary hull and a second secondary hull, wherein the first secondary hull and the second secondary hull are respectively arranged on both sides of the main hull, the main hull is provided with an engine room, and a power system is arranged in the engine room; The first sub-hull and the second sub-hull are both made of polyethylene material; or, The first sub-hull and the second sub-hull each include a metal frame structure and a polyethylene protective layer wrapping the metal frame structure; The power system includes a main engine power system and an auxiliary engine power system, wherein the main engine power system is arranged at the middle and rear part of the main hull, and the auxiliary engine power system is arranged at the front part of the main hull; The power source of at least one of the main engine power system and the auxiliary engine power system is a gas turbine engine; A pressure cabin is also provided at the bottom of the main hull. The bottom of the pressure cabin has a plurality of injection holes. The pressure cabin is connected to the exhaust pipe of the gas turbine engine. A one-way valve is provided between the exhaust pipe and the pressure cabin.

2. The trimaran according to claim 1, characterized in that: The outer surface of the main hull is provided with a polyethylene protective layer.

3. The trimaran according to claim 1, characterized in that: The power system comprises: A gas turbine generator set, comprising the gas turbine engine and a motor, wherein the gas turbine engine is connected to the motor, and the gas turbine engine can drive the motor to generate electricity; an electric motor, the electric motor being electrically connected to the electric motor, and the electric energy generated by the electric motor being input to the electric motor; A propulsion system is connected to the electric motor. The propulsion system is also connected to the gas turbine engine. The propulsion system can be driven by the electric motor and / or the gas turbine engine.

4. The trimaran according to claim 3, characterized in that: The power system further comprises an energy storage system, wherein the energy storage system is electrically connected to the electric motor and the motor respectively; The electric energy generated by the motor can be input into the energy storage system, and the electric energy stored in the energy storage system can be input into the electric motor.

5. The trimaran according to claim 4, characterized in that: The power system further comprises a current converter, through which the motor is electrically connected to the electric motor and the energy storage system respectively; and / or, The motor is an integrated motor, and the electric energy stored in the energy storage system can be input into the motor so that the motor can be used as an electric motor to drive the gas turbine engine.

6. The trimaran according to claim 3, characterized in that: The gas turbine engine comprises a compressor, a turbine and a combustion chamber, wherein the motor, the compressor and the turbine are connected via a rotating shaft, the combustion chamber is arranged between the compressor and the turbine, and the rotating shaft, the motor, the compressor and the turbine form a rotor system of the gas turbine generator set; wherein, The shaft body of the rotating shaft is an integrated structure, and the rotating shaft is arranged horizontally; The rotating shaft is also provided with a thrust bearing and at least two radial bearings, and the thrust bearing and the at least two radial bearings are non-contact bearings; The thrust bearing is arranged at a preset position on a side of the turbine close to the compressor, and the preset position is a position that enables the center of gravity of the rotor system to be located between two radial bearings that are farthest apart among the at least two radial bearings; or, the generator, the thrust bearing and the at least two radial bearings are all arranged in a first casing, and the compressor and the turbine are both arranged in a second casing; the impeller of the compressor and the impeller of the turbine are arranged side by side in the second casing; the first casing is connected to the second casing.

7. The trimaran according to claim 3, characterized in that: The rotating shaft of the gas turbine engine is connected to the propulsion system through a transmission speed regulating device.

8. The trimaran according to claim 1, characterized in that: The bottom of the pressure cabin is made of porous material.

9. The trimaran according to claim 8, characterized in that: The bottom of the pressure cabin is made of foamed aluminum alloy or foamed magnesium alloy.

10. The trimaran according to claim 1, characterized in that: The exhaust duct of the gas turbine engine is provided with a supercharging device, and the supercharging device is used to increase the pressure of the gas entering the pressure cabin.

11. A trimaran, comprising a main hull, a first secondary hull and a second secondary hull, characterized in that: The main hull is provided with an engine room, and a power system is provided in the engine room, and the power system includes a main engine power system and an auxiliary engine power system, the main engine power system is provided at the middle and rear part of the main hull, and the auxiliary engine power system is provided at the front part of the main hull, and the power source of at least one of the main engine power system and the auxiliary engine power system is a gas turbine engine; A pressure cabin is also provided at the bottom of the main hull. The bottom of the pressure cabin has a plurality of injection holes. The pressure cabin is connected to the exhaust pipe of the gas turbine engine. A one-way valve is provided between the exhaust pipe and the pressure cabin.

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