An offshore floating wave energy device

Abstract

The present application relates to the technical field of hydroelectric power generation equipment, and particularly relates to an offshore floating wave energy power generation device, which comprises a bearing device, a floating platform, a converging channel, a generator, a transmission shaft and a transmission module, the bearing device is fixedly arranged on the water bottom, the floating platform is arranged on the water surface and connected with the bearing device through a cable, the converging channel is arranged in the floating box body of the floating platform and communicated with the inner cavity of the assembly cylinder body of the floating platform, the generator is fixedly arranged at the top port of the assembly cylinder body, the transmission shaft is rotatably arranged in the inner cavity of the assembly cylinder body and connected with the power input end of the generator, and the transmission module is arranged in the inner cavity of the assembly cylinder body and connected with the transmission shaft and used for driving the transmission shaft to rotate. The core components such as the generator and the transmission module are arranged on the floating platform floating on the water surface, so that the user can maintain the device, and the problem of difficult equipment maintenance in the prior art is solved.

Description

Offshore floating wave energy generation device Technical Field

[0001] This invention relates to the field of hydropower equipment technology, and in particular to an offshore floating wave energy power generation device. Background Technology

[0002] Against the backdrop of a global energy industry shift towards a cleaner and lower-carbon structure, the development and utilization of renewable energy has become a key direction for addressing energy security challenges. Wave energy, as an important component of marine renewable energy, boasts advantages such as abundant reserves, wide distribution, and clean, pollution-free operation, making its development potential a focus of attention.

[0003] Wave energy engines, also known as wave energy power generation devices, work by collecting wave energy generated on the water surface and converting it into mechanical energy to drive a generator, ultimately achieving the goal of generating electricity using wave energy. For example, the floating-rocker direct-drive wave energy turbine generator proposed in Chinese invention patent CN102322389B uses a floating body connected to the middle of a rocker via a flexible tether. A coaxial variable-pitch turbine direct-drive underwater generator is vertically mounted at the head of the rocker, consisting of a coaxial variable-pitch turbine and a direct-drive underwater generator. The rear of the rocker is connected to a fixed pile on the seabed via a pivot. A lower support rod and an upper limit cable are installed in the middle of the rocker to limit its downward and upward movement. Due to the different connection positions of the rocker, the up-and-down movement of wave energy is amplified by the lever action of the rocker and transmitted to the vertically mounted variable-pitch horizontal axis direct-drive generator. This generator moves relative to the seawater, thereby driving the coaxial turbine at both ends of the generator to rotate and generate electricity.

[0004] However, because the main components of the equipment are all located on the seabed, there is a drawback in that the equipment is difficult to repair when it malfunctions. Summary of the Invention

[0005] To address the technical problem of difficult equipment maintenance in existing technologies, embodiments of the present invention provide an offshore floating wave energy generation device, comprising:

[0006] The supporting device is fixedly installed on the bottom of the water;

[0007] A floating platform, which is set on the water surface, with its bottom connected to a support device by cables;

[0008] The energy-concentrating channel is located inside the floating box of the floating platform. The tail end of the energy-concentrating channel is exposed on the side wall surface of one side of the floating box, and the head end of the energy-concentrating channel is connected to the inner cavity of the assembly cylinder of the floating platform.

[0009] The generator is fixedly installed at the top port of the assembly cylinder;

[0010] The drive shaft is rotatably installed in the inner cavity of the assembly cylinder. The drive shaft is vertically installed along the axial direction of the assembly cylinder. The top end of the drive shaft is connected to the power input end of the generator to drive the generator to run.

[0011] The transmission module is located inside the assembly cylinder and is connected to the transmission shaft to drive the transmission shaft to rotate.

[0012] Furthermore, the diameter of the tail end port of the energy-concentrating channel is larger than the diameter of the head end port of the energy-concentrating channel.

[0013] Furthermore, the transmission module includes:

[0014] The outer assembly ring is rotatably mounted on the inner wall of the assembly cylinder, and the outer assembly ring is arranged radially along the assembly shell.

[0015] The inner mounting ring is fitted onto the mounting section of the drive shaft to drive the drive shaft to rotate.

[0016] Several blades are arranged in the cavity between the outer and inner assembly rings. The head end of the blade is connected to the inner assembly ring, and the tail end of the blade is connected to the outer assembly ring. The blades are arranged radially around the drive shaft to drive the inner and outer assembly rings to rotate.

[0017] An angle-of-attack adjustment assembly is set on the inner and outer assembly rings. The angle-of-attack adjustment assembly is connected to several blades and is used to adjust the deflection angle of the blades.

[0018] Furthermore, the angle-of-attack adjustment component includes:

[0019] A pair of fixed protrusions are fixedly mounted on the drive shaft, and an inner mounting ring is located between the pair of fixed protrusions. The inner mounting ring is slidably connected to the drive shaft along the axial direction of the drive shaft.

[0020] Several guide grooves are formed on the inner ring surface of the outer assembly ring. The radial cross-sectional shape of the inner cavity of the outer assembly ring is polygonal. Several planes on the inner ring surface of the outer assembly ring are respectively provided with a guide groove. The central axis of the guide groove is perpendicular to the central axis of the drive shaft. The tail ends of several blades are slidably connected to several guide grooves respectively.

[0021] A pair of support springs are movably sleeved on the drive shaft. Each pair of support springs is located between a pair of fixed protrusions. The inner mounting ring is located between the pair of support springs. The support springs are used to elastically support the inner mounting ring.

[0022] Furthermore, the device also includes an impurity crushing module, located at the bottom end of the drive shaft, for crushing impurities mixed in the aqueous solution flowing into the inner cavity of the assembly cylinder through the energy-concentrating channel.

[0023] Furthermore, the impurity crushing module includes:

[0024] The lower end cover is fastened to the bottom port of the drive shaft;

[0025] Several crushing rod assemblies are arranged on the lower end cover, and the crushing rod assemblies are arranged in a circular array around the central axis of the drive shaft.

[0026] Furthermore, the breaker assembly includes:

[0027] The assembly column is fixedly installed on the circumferential side wall of the lower end cover. The assembly column is arranged radially along the assembly cylinder, and the central axis of the assembly column is perpendicular to the central axis of the assembly cylinder.

[0028] A fixing rod is fixedly installed on the end face of the assembly column, and the central axis of the fixing rod is parallel to the central axis of the assembly column.

[0029] Several first crushing teeth are fixedly installed on the circumferential sidewall of the fixed rod, and all of the first crushing teeth protrude from the outer surface of the fixed rod.

[0030] Furthermore, the breaker assembly also includes:

[0031] The assembly hole is located on the end face of the assembly column. The assembly column is a hollow column, and the inner cavity of the assembly column is connected to the inner cavity of the drive shaft. The assembly hole is also connected to the inner cavity of the assembly column.

[0032] The movable rod has its head end inserted into the inner cavity of the assembly column through the assembly hole. The radial cross-sectional shape of the movable rod matches that of the assembly hole. The movable rod and the fixed rod are arranged in parallel. The movable rod is slidably connected to the fixed rod along the axial direction of the fixed rod.

[0033] A return spring is installed in the inner cavity of the assembly column. One end of the return spring is fixedly connected to the inner wall of the assembly column, and the other end of the return spring is connected to the head end of the movable rod, which is used to elastically support the head end of the movable rod to retract into the inner cavity of the assembly column.

[0034] The flow channel is located inside the movable rod. The head end of the flow channel is exposed on the head end face of the movable rod, and the tail end of the flow channel is exposed on the circumferential side wall surface of the movable rod. After the head end of the movable rod is completely retracted into the inner cavity of the mounting column, the tail end of the flow channel is closed by the inner wall of the mounting column.

[0035] Several second crushing teeth are fixedly installed on the circumferential sidewall of the movable rod, and all of the several second crushing teeth protrude from the outer surface of the movable rod.

[0036] Furthermore, the positions of several second crushing teeth correspond one-to-one with those of several first crushing teeth, and the cutting edge of any second crushing tooth is in contact with the cutting edge of the corresponding first crushing tooth.

[0037] Furthermore, the impurity crushing module also includes:

[0038] The movable bracket is movably installed in the inner cavity of the drive shaft, and the movable bracket is slidably connected to the inner wall of the drive shaft along the axial direction of the drive shaft.

[0039] The piston is fixedly mounted at the bottom of the movable bracket. The radial cross-sectional shape of the piston matches the inner cavity of the drive shaft. The piston is located between the movable bracket and the lower end cover.

[0040] Several one-way valves are fixedly installed on the piston. The input end of any one-way valve is connected to the cavity between the piston and the inner top wall of the drive shaft, and the output end of any one-way valve is connected to the cavity between the piston and the lower end cover.

[0041] Several strip-shaped holes are formed on the circumferential sidewall of the drive shaft. Any one of the strip-shaped holes connects the cavity between the piston and the top wall of the inner cavity of the drive shaft. The strip-shaped holes are arranged along the axial direction of the drive shaft.

[0042] Several connectors are fixedly mounted on the inner assembly ring. Any one of the connectors passes through one of the slots and is fixedly connected to the movable bracket, which is used to drive the movable bracket to slide along the axial direction of the drive shaft.

[0043] An offshore floating wave energy generation device according to an embodiment of the present invention has the following beneficial effects:

[0044] 1. This device solves the problem of difficult equipment maintenance in the prior art by setting the main components such as the generator and transmission module on a floating platform on the water surface, so as to facilitate the user's maintenance of the device.

[0045] 2. This device uses an outer mounting ring and a movable inner mounting ring, along with several blades, to perform power conversion. This allows the blades to adjust their deflection direction based on the axial force they experience. Consequently, the axial force on the blades during water flow into or out of the floating platform's cavity can be converted into torque that drives the drive shaft to rotate in the forward direction. Furthermore, when the axial water flow impact force on the inner mounting ring and several blades is too large, the deflection angle of the blades also increases until it approaches 90°. This reduces the projected area of ​​the blades perpendicular to the water flow direction, thereby reducing the power conversion efficiency of the blades and preventing the generator from being overloaded due to excessive drive shaft speed.

[0046] 3. This device adds a movable support and piston, and uses multiple connectors to fix the movable support and the inner assembly ring. When several blades and the inner assembly ring are subjected to the downward force brought by the water flow, the piston can be driven to move downward, which in turn drives the movable rod to move axially along the fixed rod. This allows the second crushing tooth to cooperate with the first crushing tooth to cut the net-like or filamentous impurities wrapped around the fixed rod and the transmission rod. The cut impurities can then be discharged with the water flow from the inner cavity of the floating platform, thus mitigating the negative impact of the device being entangled by broken fishing nets, live aquatic plants, and other impurities.

[0047] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0048] Figure 1 is a perspective view of a floating platform according to an embodiment of the present invention;

[0049] Figure 2 is a schematic diagram of the internal structure of the floating platform according to an embodiment of the present invention;

[0050] Figure 3 is a schematic diagram of the assembly of the transmission module according to an embodiment of the present invention;

[0051] Figure 4 is a schematic diagram of the assembly of the inner assembly ring according to an embodiment of the present invention;

[0052] Figure 5 is an assembly schematic diagram of the impurity crushing module according to an embodiment of the present invention;

[0053] Figure 6 is an exploded view of the impurity crushing module according to an embodiment of the present invention (the movable support, piston and one-way valve are hidden).

[0054] Explanation of reference numerals in the attached figures:

[0055] 1-Floating platform, 11-Floating box, 111-Float, 12-Assembly cylinder, 2-Hydrofoil, 3-Energy focusing channel, 4-Generator, 5-Drive shaft, 51-Assembly shaft section, 6-Drive module, 61-Outer assembly ring, 611-Guide groove, 62-Inner assembly ring, 621-Assembly groove, 622-Roller, 63-Blade, 641-Fixing protrusion, 65-Support spring, 7-Impurity crushing module, 71-Lower end cover, 721-Assembly column, 7211-Assembly hole, 722-Fixing rod, 723-First crushing tooth, 724-Moving rod, 725-Reset spring, 726-Guide channel, 727-Second crushing tooth, 73-Moving bracket, 74-Piston, 75-One-way valve, 76-Strip hole, 77-Connector. Detailed Implementation

[0056] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0057] The foregoing and other technical contents, features, and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, or back, are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the present invention. Furthermore, in all embodiments, the same reference numerals denote the same elements.

[0058] First, an offshore floating wave energy generation device according to an embodiment of the present invention will be described with reference to Figures 1-6. This device is used for hydropower generation and has a wide range of applications.

[0059] Specifically, as shown in Figures 1 and 2, an offshore floating wave energy generation device according to an embodiment of the present invention includes: a support device (not shown in the figures), a floating platform 1, an energy-concentrating channel 3, a generator 4, a drive shaft 5, and a drive module 6; the support device is fixedly installed on the bottom of the water; the floating platform 1 is floating on the water surface, and the bottom of the floating platform 1 is connected to the support device via a cable (not shown in the figures); the energy-concentrating channel 3 is installed inside the floating box 11 of the floating platform 1, the tail end of the energy-concentrating channel 3 is exposed on one side wall surface of the floating box 11, and the head end of the energy-concentrating channel 3 communicates with the inner cavity of the assembly cylinder 12 of the floating platform 1; a float 111 is fixedly installed inside the floating box 11, and the float is located on one side of the energy-concentrating channel 3 to provide buoyancy for the floating platform 1. Preferably, in this embodiment... A hydrofoil 2 is fixedly installed at the bottom of the floating tank 11. The hydrofoil 2 is arranged along the length of the floating platform 1, so that the floating platform 1 can adjust the orientation of the tail end port of the energy-concentrating channel 3 in accordance with the water flow direction. The generator 4 is fixedly installed at the top port of the assembly cylinder 12. Preferably, in this embodiment, an assembly bracket is fixedly installed at the top port of the assembly cylinder 12, and the generator 4 is fixedly installed on the assembly bracket. The drive shaft 5 is installed in the inner cavity of the assembly cylinder 12. The top end of the drive shaft 5 is rotatably connected to the assembly bracket. The drive shaft 5 is vertically arranged along the axial direction of the assembly cylinder 12. The top end of the drive shaft 5 is connected to the power input end of the generator 4 to drive the generator 4 to run. The transmission module 6 is installed in the inner cavity of the assembly cylinder 12. The transmission module 6 is connected to the drive shaft 5 to drive the drive shaft 5 to rotate.

[0060] Furthermore, as shown in Figures 1 and 2, the diameter of the tail end port of the energy focusing channel 3 is larger than the diameter of the head end port of the energy focusing channel 3, so as to increase the impact force of the aqueous solution flowing into the inner cavity of the assembly cylinder 12 through the head end port of the energy focusing channel 3.

[0061] Further, as shown in Figures 2 and 3, the transmission module 6 includes: an outer assembly ring 61, an inner assembly ring 62, several blades 63, and an angle-of-attack adjustment assembly; the outer assembly ring 61 is rotatably mounted on the inner wall of the assembly cylinder 12, and the outer assembly ring 61 is arranged radially along the assembly shell; the inner assembly ring 62 is sleeved on the assembly shaft section 51 of the transmission shaft 5, and is used to drive the transmission shaft 5 to rotate; several blades 63 are arranged in the cavity between the outer assembly ring 61 and the inner assembly ring 62, the head end of the blade 63 is connected to the inner assembly ring 62, the tail end of the blade 63 is connected to the outer assembly ring 61, and the several blades 63 are radially distributed around the transmission shaft 5, and are used to drive the inner assembly ring 62 and the outer assembly ring 61 to rotate; the angle-of-attack adjustment assembly is arranged on the inner assembly ring 62 and the outer assembly ring 61, and the angle-of-attack adjustment assembly is connected to the several blades 63, and is used to adjust the deflection angle of the blades 63.

[0062] Further, as shown in Figures 2 and 3, the angle of attack adjustment assembly includes: a pair of fixed protrusions 641, several guide grooves 611, and a pair of support springs 65; the pair of fixed protrusions 641 are fixedly mounted on the drive shaft 5, and the inner mounting ring 62 is located between the pair of fixed protrusions 641, and the inner mounting ring 62 is slidably connected to the drive shaft 5 along the axial direction of the drive shaft 5; several guide grooves 611 are formed on the inner ring surface of the outer mounting ring 61, the radial cross-sectional shape of the inner cavity of the outer mounting ring 61 is polygonal, and several planes on the inner ring surface of the outer mounting ring 61 are respectively provided with a guide groove 611, the central axis of the guide groove 611 is perpendicular to the central axis of the drive shaft 5, and the tail ends of several blades 63 are slidably connected to several guide grooves 611 respectively; a pair of support springs 65 are movably sleeved on the drive shaft 5, and both of the support springs 65 are located between the pair of fixed protrusions 641, and the inner mounting ring 62 is located between the pair of support springs 65, and the support springs 65 are used to elastically support the inner mounting ring 62.

[0063] Preferably, as shown in Figures 2-4, the inner mounting ring 62 and the mounting shaft section 51 of the drive shaft 5 adopt the following sliding assembly scheme: the mounting shaft end of the drive shaft 5 is a prism, the radial cross-sectional shape of the inner cavity of the inner mounting ring 62 is a prism, and multiple planes on the circumferential sidewall surface of the mounting shaft end correspond one-to-one with multiple planes on the inner surface of the inner mounting ring 62; each plane on the inner surface of the inner mounting ring 62 is provided with a mounting groove 621; a pair of rollers 622 are provided inside any mounting groove 621, the two ends of the rollers 622 are rotatably connected to the inner walls on both sides of the mounting groove 621, the central axis of the rollers 622 is perpendicular to the central axis of the drive shaft 5, and the circumferential sidewall surface of the rollers 622 protrudes from the inner surface of the inner mounting ring 62 and abuts against one of the planes on the circumferential sidewall surface of the drive shaft 5, for rolling support of the inner mounting ring 62.

[0064] Furthermore, as shown in Figures 2, 4, and 5, this device also includes an impurity crushing module 7, which is located at the bottom end of the drive shaft 5 and is used to crush impurities mixed in the aqueous solution that flows into the inner cavity of the assembly cylinder 12 through the energy-concentrating channel 3.

[0065] Furthermore, as shown in Figures 2, 4, and 5, the impurity crushing module 7 includes: a lower end cover 71 and several crushing rod assemblies; the lower end cover 71 is fastened to the bottom port of the drive shaft 5; several crushing rod assemblies are arranged on the lower end cover 71, and the several crushing rod assemblies are arranged in a circumferential array around the central axis of the drive shaft 5.

[0066] Further, as shown in Figures 2, 4-6, the crushing rod assembly includes: an assembly column 721, a fixing rod 722, and a plurality of first crushing teeth 723; the assembly column 721 is fixedly mounted on the circumferential side wall of the lower end cover 71, the assembly column 721 is arranged radially along the assembly cylinder 12, and the central axis of the assembly column 721 is perpendicular to the central axis of the assembly cylinder 12; the fixing rod 722 is fixedly mounted on the end face of the end of the assembly column 721, and the central axis of the fixing rod 722 is parallel to the central axis of the assembly column 721; the plurality of first crushing teeth 723 are fixedly mounted on the circumferential side wall of the fixing rod 722, and the plurality of first crushing teeth 723 protrude from the outer surface of the fixing rod 722.

[0067] Further, as shown in Figures 2, 4-6, the crushing rod assembly also includes: an assembly hole 7211, a movable rod 724, a return spring 725, a guide channel 726, and several second crushing teeth 727; the assembly hole 7211 is opened on the end face of the assembly column 721, the assembly column 721 is a hollow column, the inner cavity of the assembly column 721 is connected to the inner cavity of the drive shaft 5, and the assembly hole 7211 is connected to the inner cavity of the assembly column 721; the head end of the movable rod 724 is movably inserted into the inner cavity of the assembly column 721 through the assembly hole 7211, the radial cross-sectional shape of the movable rod 724 matches that of the assembly hole 7211, the movable rod 724 is arranged in parallel with the fixed rod 722, and the movable rod 724 is slidably connected to the fixed rod 722 along the axial direction of the fixed rod 722; the return spring 725 is provided on the assembly column 721. Inside the cavity, one end of the return spring 725 is fixedly connected to the inner wall of the mounting column 721, and the other end of the return spring 725 is connected to the head end of the movable rod 724, which is used to elastically support the head end of the movable rod 724 to retract into the cavity of the mounting column 721; the guide channel 726 is opened inside the movable rod 724, the head end port of the guide channel 726 is exposed on the head end end face surface of the movable rod 724, and the tail end port of the guide channel 726 is exposed on the circumferential side wall surface of the movable rod 724. After the head end of the movable rod 724 is completely retracted into the cavity of the mounting column 721, the tail end port of the guide channel 726 is closed by the inner wall of the mounting column 721; a number of second breaking teeth 727 are fixedly arranged on the circumferential side wall of the movable rod 724, and the number of second breaking teeth 727 protrude from the outer surface of the movable rod 724.

[0068] Furthermore, as shown in Figures 2, 4-6, the positions of several second breaking teeth 727 correspond one-to-one with those of several first breaking teeth 723, and the cutting edge of any second breaking tooth 727 is in contact with the cutting edge of the corresponding first breaking tooth 723.

[0069] Furthermore, as shown in Figures 2, 4-6, the impurity crushing module 7 also includes: a movable support 73, a piston 74, several one-way valves 75, several slotted holes 76, and several connecting parts 77. The movable support 73 is movably disposed in the inner cavity of the drive shaft 5, and the movable support 73 is slidably connected to the inner wall of the drive shaft 5 along the axial direction of the drive shaft 5; the piston 74 is fixedly disposed at the bottom of the movable support 73, and the radial cross-sectional shape of the piston 74 matches that of the inner cavity of the drive shaft 5. The piston 74 is located between the movable support 73 and the lower end cover 71; several one-way valves 75 are fixedly disposed on the piston 74, and any one-way valve... The input end of valve 75 connects to the cavity between piston 74 and the inner top wall of transmission shaft 5, and the output end of any one-way valve 75 connects to the cavity between piston 74 and lower end cover 71; several strip holes 76 are opened on the circumferential side wall of transmission shaft 5, and any one strip hole 76 connects to the cavity between piston 74 and the inner top wall of transmission shaft 5, and the strip holes 76 are arranged along the axial direction of transmission shaft 5; several connecting pieces 77 are fixedly arranged on the inner mounting ring 62, and any one connecting piece 77 passes through one of the strip holes 76 and is fixedly connected to the movable bracket 73, which is used to drive the movable bracket 73 to slide along the axial direction of transmission shaft 5.

[0070] During equipment operation, waves from the water surface surge into the inner cavity of the energy-concentrating channel 3 from its tail end port, and then into the inner cavity of the assembly cylinder 12 from its head end port. The aqueous solution flowing into the assembly cylinder 12 pushes the inner assembly ring 62 upwards against the elastic force of the support spring 65 located above it, causing the blades 63 to deflect to one side at a certain angle. This converts the axial driving force on several blades 63 into a driving force that drives the transmission shaft 5 to rotate in the forward direction, thereby driving the generator 4 to operate. Similarly, during the process of water flowing out of the floating platform 1, the aqueous solution in the assembly cylinder 12 flows into the energy-concentrating channel 3 from its head end port under the action of gravity, and then into the inner cavity of the assembly cylinder 12 from its tail end port. As the water flows out of the port, during the process, the inner mounting ring 62, driven by the aqueous solution, overcomes the elastic force of the supporting spring 65 located below it and slides downward a certain distance. Several blades 63, driven by the inner mounting ring 62, rotate towards the other side at a certain angle to convert the axial driving force of the blades 63 into a driving force that drives the transmission shaft 5 to rotate in the forward direction, thereby using the transmission shaft 5 to drive the generator 4 to run. During the deflection process of the blades 63, when the axial driving force of the blades 63 is too large, the deflection angle of the blades 63 will further increase as the axial driving force increases, until the deflection angle of the blades 63 approaches 90°, so as to reduce the power conversion efficiency of the blades 63 and prevent the generator 4 from being overloaded.

[0071] During the rotation of the drive shaft 5, the drive shaft 5 drives the lower end cover 71 located at the lower end to rotate synchronously. This allows the fixed rod 722 and movable rod 724 on the lower end cover 71 to scoop up filamentous and net-like impurities mixed in the water flow, preventing them from entangled on the blades 63. Furthermore, as the inner mounting ring 62 slides downwards under force, it drives the movable bracket 73 and piston 74 to move downwards synchronously, causing the movable rod 724 to extend a certain distance outwards towards the mounting column 721, thereby utilizing the fixed rod 722 and movable rod 724 located at the lower end cover 71 to scoop up filamentous and net-like impurities mixed in the water flow, preventing them from entangled on the blades 63. The second breaking tooth 727 on the movable rod 724 cooperates with the first breaking tooth 723 on the fixed rod 722. The tip of the tooth wraps around the filamentous or mesh-like impurities on the fixed rod 722 and the movable rod 724 so that the impurities can flow out of the floating platform 1 with the water flow. During the process of the movable bracket 73 and piston 74 moving upward and resetting under the drive of the inner assembly ring 62, the movable rod 724 is retracted into the inner cavity of the assembly body again under the elastic support of the reset spring 725, so that the movable rod 724 resets.

[0072] The above description, with reference to Figures 1-6, illustrates an offshore floating wave energy generation device according to an embodiment of the present invention, which possesses the following beneficial effects:

[0073] 1. This device solves the problem of difficult equipment maintenance in the prior art by setting the main components such as the generator 4 and the transmission module 6 on a floating platform 1 that floats on the water surface, so that users can maintain the device.

[0074] 2. This device uses an outer mounting ring 61 in conjunction with a movable inner mounting ring 62 and several blades 63 to perform power conversion. This allows the blades 63 to adjust their deflection direction according to the axial force direction, so that the axial force on the blades 63 during the flow of water into or out of the inner cavity of the floating platform 1 can be converted into torque that drives the transmission shaft 5 to rotate in the forward direction. Furthermore, when the axial water flow impact force on the inner mounting ring 62 and several blades 63 is too large, the deflection angle of the blades 63 also increases until the deflection angle of the blades 63 approaches 90°, thereby reducing the projected area of ​​the blades 63 in the direction perpendicular to the water flow, thereby reducing the power conversion efficiency of several blades 63 and preventing the generator 4 from being overloaded due to the excessive speed of the transmission shaft 5.

[0075] 3. This device adds a movable support 73 and a piston 74, and uses multiple connectors 77 to fix the movable support 73 and the inner assembly ring 62. When several blades 63 and the inner assembly ring 62 are subjected to the downward force brought by the water flow, the piston 74 can be driven to move downward, which drives the movable rod 724 to move axially along the fixed rod 722. Thus, the second breaking tooth 727 cooperates with the first breaking tooth 723 to cut the net-like or filamentous impurities wrapped around the fixed rod 722 and the transmission rod, so that the cut impurities can be discharged with the water flow into the inner cavity of the floating platform 1, thereby improving the negative impact of the device caused by the entanglement of broken fishing nets and aquatic plants.

[0076] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0077] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. An offshore floating wave energy generation device, characterized in that, It includes: a support device, fixedly installed on the bottom of the water; a floating platform, floating on the water surface, the bottom of which is connected to the support device via a cable; an energy-concentrating channel, located inside the floating tank of the floating platform, with its tail end exposed on one side wall of the floating tank and its head end communicating with the inner cavity of the assembly cylinder of the floating platform; a generator, fixedly installed at the top port of the assembly cylinder; and a drive shaft, rotatably installed within the inner cavity of the assembly cylinder, the drive shaft being vertically positioned along the axial direction of the assembly cylinder. The transmission shaft is connected at its top end to the power input end of the generator to drive the generator. A transmission module is disposed within the inner cavity of the assembly cylinder and connected to the transmission shaft to drive the transmission shaft to rotate. The transmission module includes: an outer assembly ring rotatably disposed on the inner wall of the assembly cylinder; an inner assembly ring sleeved on the assembly shaft section of the transmission shaft to drive the transmission shaft to rotate; and several blades disposed in the cavity between the outer and inner assembly rings, with the tip of each blade connected to the inner assembly ring. A plurality of blades are radially distributed around the drive shaft, and are used to drive the inner and outer assembly rings to rotate. An angle-of-attack adjustment assembly is disposed on the inner and outer assembly rings and is connected to the plurality of blades to adjust the deflection angle of the blades. The angle-of-attack adjustment assembly includes: a pair of fixed protrusions fixedly disposed on the drive shaft; the inner assembly ring is located between the pair of fixed protrusions; the inner assembly ring is axially aligned with the drive shaft. The drive shaft is slidably connected; several guide grooves are formed on the inner ring surface of the outer assembly ring, the radial cross-sectional shape of the inner cavity of the outer assembly ring is polygonal, and several planes on the inner ring surface of the outer assembly ring are respectively provided with one of the guide grooves, and the tail ends of the several blades are slidably connected to the several guide grooves respectively; a pair of support springs are movably sleeved on the drive shaft, the pair of support springs are both located between the pair of fixed protrusions, the inner assembly ring is located between the pair of support springs, and the support springs are used to elastically support the inner assembly ring.

2. The offshore floating wave energy generation device as described in claim 1, characterized in that, The diameter of the tail end port of the energy focusing channel is larger than the diameter of the head end port of the energy focusing channel.

3. The offshore floating wave energy generation device as described in claim 1, characterized in that, It also includes: an impurity crushing module, located at the bottom end of the drive shaft, for crushing impurities mixed in the aqueous solution flowing into the inner cavity of the assembly cylinder through the energy-concentrating channel.

4. The offshore floating wave energy generation device as described in claim 3, characterized in that, The impurity crushing module includes: a lower end cover, which is fastened to the bottom port of the drive shaft; and a plurality of crushing rod assemblies, which are disposed on the lower end cover and are arranged in a circumferential array around the central axis of the drive shaft.

5. The offshore floating wave energy generation device as described in claim 4, characterized in that, The crushing rod assembly includes: an assembly column, fixedly mounted on the circumferential sidewall of the lower end cover, the assembly column being arranged radially along the assembly cylinder, and the central axis of the assembly column being perpendicular to the central axis of the assembly cylinder; a fixing rod, fixedly mounted on the end face of the assembly column, the central axis of the fixing rod being parallel to the central axis of the assembly column; and a plurality of first crushing teeth, fixedly mounted on the circumferential sidewall of the fixing rod, each of the plurality of first crushing teeth protruding from the outer surface of the fixing rod.

6. The offshore floating wave energy generation device as described in claim 5, characterized in that, The crushing rod assembly further includes: an assembly hole formed on the end face of the assembly column, the assembly column being a hollow column, the inner cavity of the assembly column communicating with the inner cavity of the drive shaft, and the assembly hole communicating with the inner cavity of the assembly column; a movable rod, the head end of which is movably inserted into the inner cavity of the assembly column through the assembly hole, the radial cross-sectional shape of the movable rod matching that of the assembly hole, the movable rod being arranged parallel to the fixed rod, and the movable rod being slidably connected to the fixed rod along the axial direction of the fixed rod; and a return spring disposed in the inner cavity of the assembly column, one end of which is fixedly connected to the inner wall of the assembly column. The other end of the return spring is connected to the head end of the movable rod, which elastically supports the head end of the movable rod as it retracts into the inner cavity of the assembly column. A flow guide channel is formed inside the movable rod, with its head end exposed on the head end face of the movable rod and its tail end exposed on the circumferential sidewall surface of the movable rod. After the head end of the movable rod is completely retracted into the inner cavity of the assembly column, the tail end of the flow guide channel is closed by the inner wall of the assembly column. A plurality of second breaking teeth are fixedly disposed on the circumferential sidewall of the movable rod, and all of the plurality of second breaking teeth protrude from the outer surface of the movable rod.

7. The offshore floating wave energy generation device as described in claim 6, characterized in that, The positions of the plurality of second crushing teeth correspond one-to-one with the plurality of first crushing teeth, and the cutting edge of any second crushing tooth is in contact with the cutting edge of the corresponding first crushing tooth.

8. The offshore floating wave energy generation device as described in claim 4, characterized in that, The impurity crushing module further includes: a movable support, movably disposed within the inner cavity of the drive shaft, the movable support being slidably connected to the inner wall of the drive shaft along the axial direction of the drive shaft; a piston, fixedly disposed at the bottom of the movable support, the piston having a radial cross-sectional shape matching the inner cavity of the drive shaft, the piston being located between the movable support and the lower end cover; a plurality of one-way valves, fixedly disposed on the piston, the input end of any one-way valve connecting to the cavity between the piston and the top wall of the inner cavity of the drive shaft, the output end of any one-way valve connecting to the cavity between the piston and the lower end cover; a plurality of strip-shaped holes, formed on the circumferential sidewall of the drive shaft, any one of the strip-shaped holes connecting to the cavity between the piston and the top wall of the inner cavity of the drive shaft, the strip-shaped holes being disposed along the axial direction of the drive shaft; and a plurality of connecting members, fixedly disposed on the inner mounting ring, any one of the connecting members passing through one of the strip-shaped holes and fixedly connected to the movable support, for driving the movable support to slide along the axial direction of the drive shaft.

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