A mechanical transmission wave energy generation device and method

Abstract

The present invention discloses a mechanical transmission wave energy power generation device and method, which relates to the technical field of new energy power generation. It includes a plurality of wave energy capture floats arranged at intervals, each wave energy capture float is connected to a vertically arranged rack, the rack meshes with a gear, and each gear is installed on the same input shaft; one end of the input shaft is connected to a vibration damping element, and the other end is successively installed with a torque limiter, a one-way clutch and a bevel gear set; the bevel gear set is connected to a generator through an output shaft, and a speed increasing mechanism is installed on the output shaft. The present invention adopts a multi-point input method to achieve combined flow output, which can improve the input efficiency; the power generation efficiency is improved by setting a speed increasing mechanism; the vibration damping element can effectively alleviate the damage to the equipment under extreme working conditions, and the torque limiter can limit the maximum torque in the transmission system, playing an overload protection role and improving the system reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy power generation, and particularly to a mechanical transmission wave energy power generation device and method. Background Art

[0002] There are various forms of wave energy power generation devices, but generally, wave energy needs to go through three - stage conversion to be converted into electrical energy. The capture device interacts with the waves to generate motion to absorb wave energy, which is the first - stage conversion; through a certain transmission mechanism, the energy obtained above is converted and optimized to generate relatively stable mechanical energy, etc., which is the second - stage conversion; the third - stage conversion usually converts mechanical energy into electrical energy by a power generation device; among them, the second - stage conversion is the key link for the conversion efficiency and reliability of the wave energy power generation system. Currently, the main transmission types in the second - stage conversion device of wave energy are pneumatic transmission and hydraulic transmission. These two types of transmissions have low efficiency, and the existing transmission devices are vulnerable to impact and damage under complex working conditions and extreme situations. For example:

[0003] CN110374785B discloses a wave energy power generation device based on motion rectification, including a float, a ball screw drive element, a mechanical motion rectifier, and a generator set. The mechanical motion rectifier includes an input shaft of the mechanical motion rectifier and driven shafts symmetrically arranged on both sides of the input shaft. The float is fixedly connected to the nut of the ball screw drive element through a push rod; the screw is connected to the input end of the input shaft of the mechanical motion rectifier through a coupling. A first upper gear and a first lower gear are arranged on the input shaft, and one - way clutch bearings are installed in both the first upper gear and the first lower gear. The input shaft of the generator set is connected to the output ends of the input shaft and the driven shafts of the mechanical motion rectifier through couplings.

[0004] The mechanical motion rectification system of the above - mentioned solution is a gear combination. Although the gear combination can achieve mechanical rectification, the transmission system is too complex, and the vibration and noise in gear transmission are relatively obvious. The manufacturing and installation accuracy is relatively high, and in the actual application process, the application value is not high. Moreover, although it can achieve wave energy power generation to a certain extent, the device does not have corresponding protection and vibration - damping devices, is vulnerable to damage and impact, and the system reliability is low. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a mechanical transmission wave energy power generation device and method. By adopting a multi - point input method, combined flow output can be realized, which can improve the input efficiency; by setting a speed - increasing mechanism, the power generation efficiency can be improved; the vibration - damping element can effectively relieve the damage of extreme working conditions to the equipment, and the torque limiter can limit the maximum torque in the transmission system, playing an overload protection role and improving the system reliability.

[0006] In order to achieve the above - mentioned purpose, the present invention is realized through the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a mechanical transmission wave energy power generation device, which includes a plurality of wave energy capture floats arranged at intervals. Each wave energy capture float is connected to a vertically arranged rack, and the rack meshes with a gear. Each gear is installed on the same input shaft;

[0008] One end of the input shaft is connected to a damping element, and a torque limiter, a one-way clutch and a bevel gear set are installed in sequence at the other end; the bevel gear set is connected to a generator through an output shaft, and a speed increasing mechanism is installed on the output shaft.

[0009] As a further implementation manner, the damping element includes a driving disk and a plurality of groups of damping elements arranged on one side of the driving disk. One end of the damping element is connected to the input shaft and is evenly distributed along the circumference of the input shaft.

[0010] As a further implementation manner, the damping element includes a damper, a spring and a driven element. The damper and the spring are arranged in parallel. One end of the two is connected to the input shaft, and the other end is connected to a driven disk.

[0011] As a further implementation manner, the speed increasing mechanism includes a 3S clutch, a flywheel and a speed increaser arranged in sequence from one end close to the bevel gear set to the other end.

[0012] As a further implementation manner, the rack cooperates with a guide rail, and the rack moves up and down along the guide rail in the movement state of the wave energy capture float.

[0013] As a further implementation manner, the guide rail is fixed to one side of the frame, and the guide rail is covered by a housing.

[0014] As a further implementation manner, an installation groove is formed on the top surface of the wave energy capture float. One end of the rack cooperates with the installation groove and is connected to the wave energy capture float through a connecting piece.

[0015] As a further implementation manner, the bottom surface of the wave energy capture float is an arc surface.

[0016] As a further implementation manner, the bevel gear set includes a first bevel gear, a second bevel gear and a third bevel gear. The second bevel gear is installed on the output shaft, the first bevel gear and the third bevel gear are respectively installed on the input shaft, and the second bevel gear meshes between the first bevel gear and the third bevel gear.

[0017] In a second aspect, an embodiment of the present invention further provides a working method of a mechanical transmission wave energy power generation device. A plurality of wave energy capture floats form a multi-point input structure. As the waves rise and fall, the rack makes the same movement and then drives the gears that cooperate with it to rotate, realizing the conversion of linear - rotary motion; the energy of the rotary motion is transmitted to the generator through the bevel gear set and the speed increasing mechanism.

[0018] The beneficial effects of the present invention are as follows:

[0019] (1) In the present invention, wave energy capture floats and racks are used as the input structure of wave energy. As the waves rise and fall, the racks also move in the same way, driving the gears that cooperate with them to rotate, realizing the conversion of linear-rotary motion. The wave energy capture floats consist of multiple groups and adopt a multi-point input method for load distribution to achieve confluent output, which can improve the wave energy input efficiency.

[0020] (2) A torque limiter is installed on the input shaft of the present invention, which can effectively prevent overload, avoid excessive torque on the input shaft caused by overly large waves, resulting in overloading, and can effectively protect the input shaft; installing a torque limiter can limit the working load.

[0021] (3) The mechanical rectification device of the present invention is realized through a one-way clutch. The one-way clutch can ensure that the rotation direction of the gear remains single, preventing sudden changes in the load on the gear from causing mechanism overload. When the rotation direction of the input shaft changes, the shaft inside the clutch separates, and connects in the reverse direction, thus achieving the one-way rotation of the bevel gear set and then realizing mechanical rectification. The mechanical rectification device has a simple structure, can not only achieve mechanical rectification but also reduce the occurrence of mechanism failures, thereby improving the overall reliability of the system.

[0022] (4) The 3S clutch and flywheel of the present invention can keep the output speed of the output shaft stable. When the rotational speed of the output shaft is relatively high, the 3S clutch engages, and the input wave energy is divided into two parts. One part acts on output power generation, and the other part acts on the flywheel. When the input power is relatively small, the 3S clutch disengages, and the energy of the flywheel is used to drive the motor to rotate, thereby maintaining a relatively stable input rotational speed; the speed increaser can avoid low power of the generator caused by too low rotational speed of the output shaft, and the speed increasing gearbox can match the input rotational speed with the output rotational speed, enabling the system to have a high power generation efficiency and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings forming a part of this specification are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0024] Figure 1 is a schematic structural diagram of the present invention according to one or more embodiments;

[0025] Figure 2 is a schematic structural diagram of the vibration damping element of the present invention according to one or more embodiments;

[0026] Among them, 1. wave energy capture float, 2. guide rail, 3. shock absorber, 4. rack, 5. gear, 6. input shaft, 7. torque limiter, 8. one-way clutch, 9. first bevel gear, 10. third bevel gear, 11. second bevel gear, 12. 3S clutch, 13. flywheel, 14. speed increaser, 15. output shaft, 16. generator, 17. driving disc, 18. damper, 19. spring, 20. driven disc, 21. clay buffer, 22. frame. Specific implementation mode

[0027] Embodiment 1:

[0028] This embodiment provides a mechanical transmission wave energy power generation device, as Figure 1 shown, including a plurality of wave energy capture floats 1, which are arranged at intervals in the same direction. By adopting the multi-point input method, the confluent output can be realized, and the input efficiency can be improved.

[0029] Each wave energy capture float 1 is connected to a vertically arranged rack 4. The rack 4 meshes with the gear 5, and the gear 5 corresponds to the rack 4 one by one; each gear 5 is installed on the same input shaft 6. The wave energy capture float 1 floats with the wave, causing the rack 4 to move up and down. The rack 4 drives the gear 5 to rotate, thereby realizing the conversion of linear motion into rotational motion. The wave energy capture float 1, the gear 5 and the rack 4 constitute an energy capture device for capturing wave energy and converting wave energy into mechanical energy under the movement of the gear 5 and the rack 4.

[0030] In order to guide the rack 4, a guide rail 2 is arranged on the side of the rack 4. The guide rail 2 and the rack 4 form a sliding pair. Among them, the guide rail 2 is a fixed component, which is installed on one side of the frame 22, and the rack 4 is a moving component. The gear 5, the torque limiter 7, the one-way clutch 8, the bevel gear set, and the input shaft 6 constitute a transmission system for further transmitting the converted mechanical energy. Except for the wave energy capture float 1, the power generation device of this embodiment is arranged in a closed housing to play a protective role.

[0031] A clay buffer 21 is installed on the back side of the guide rail 2, and the clay buffer 21 is located at the bottom end of the guide rail 2 to prevent the wave energy capture float 1 from colliding with the transmission system.

[0032] As Figure 1 shown, the bottom surface of the wave energy capture float 1 is an arc surface, and an installation groove for cooperating with the rack 4 is opened on its top surface. The end of the rack 4 is clamped in the installation groove and is connected to the wave energy capture float 1 through a pin shaft.

[0033] One end of the input shaft 6 is connected to the shock-absorbing element 3, and the other end is equipped with a bevel gear set. Along the shaft section between the shock-absorbing element 3 and the bevel gear set, each gear 5, the torque limiter 7, and the one-way clutch 8 are installed in sequence. Moreover, the first gear 5 is arranged close to the end where the shock-absorbing element 3 is located, and the torque limiter 7 is arranged close to the last gear 5.

[0034] The torque limiter 7 is used to limit the torque to prevent danger caused by excessive torque; the one-way clutch 8 is used to prevent the gear 5 from reversing and affecting the normal rotation of the bevel gear set. When the rotation direction of the gear 5 changes, the one-way clutch 8 disconnects the connection, enabling the bevel gear set to rotate in the previous direction.

[0035] The shock-absorbing element 3 is used to buffer the impact of ocean waves. As Figure 2 shown, the shock-absorbing element 3 includes a driving disk 17 and shock-absorbing elements. Multiple groups of shock-absorbing elements are arranged at intervals along the circumferential direction of the input shaft 6, for example, four groups are arranged. The driving disk 17 is fixedly connected to the input shaft 6. The shock-absorbing element includes a spring 19, a damper 18, and a driven disk 20. The spring 19 and the damper 18 are arranged in parallel. One end of both is connected to the input shaft 6, and the other end is connected to the driven disk 20. The diameter of the driven disk 20 is much smaller than that of the driving disk 17.

[0036] The impact suppression principle of this embodiment based on the additional shock-absorbing element is as follows:

[0037] Ocean wave impacts have the characteristic of low frequency, and quasi-zero stiffness has good low-frequency suppression characteristics. First, a quasi-zero stiffness additional element (damper 18, spring 19) composed of positive and negative stiffness is designed. One end of the damper 18 and the spring 19 is connected to the input shaft 6, and the other end is connected to the driven disk 20. Using a magnetic gear for speed increase in the speed reducer can enable the device to have effective overload protection and reduce vibration.

[0038] Through the harmonic balance method for analytical solution, study the nonlinear amplitude-frequency characteristics and nonlinear vibration transmission characteristics of the system, analyze the influence law of the parameters of the additional element on the impact vibration, so as to reveal its impact suppression mechanism; then, through simulation analysis, explore the stability problem of the system under different ocean wave impacts; finally, through bench tests, verify the impact suppression performance of the additional element.

[0039] As Figure 1 shown, the bevel gear set includes a first bevel gear 9, a second bevel gear 11, and a third bevel gear 10. The second bevel gear 11 is installed on the output shaft 15. The first bevel gear 9 and the third bevel gear 10 are respectively installed on the input shaft 6, and the second bevel gear 11 meshes between the first bevel gear 9 and the third bevel gear 10. By setting the bevel gear set, the axis of the output shaft 15 is perpendicular to the axis of the input shaft 6.

[0040] One end of the output shaft 15 is connected to the second bevel gear 11, and the other end is connected to the generator 16; a speed increasing mechanism is installed on the output shaft 15, and the speed increasing mechanism can match the input speed with the output speed to improve the power generation efficiency. The speed increasing mechanism includes a 3S clutch 12, a flywheel 13, and a speed increaser 14 arranged in sequence from the end close to the bevel gear set to the other end.

[0041] The 3S clutch 12 is used to transmit the speed to the output shaft 15 when the input speed is relatively high. When the speed of the input shaft 6 is relatively low, the 3S clutch 12 disconnects and does not affect the speed of the output shaft 15. The flywheel 13 is used to store kinetic energy. When the speed of the input shaft 6 is relatively low, the 3S clutch 12 disconnects. At this time, the flywheel 13 already stores a sufficient amount of kinetic energy. After disconnection, the flywheel 13 drives the subsequent device to rotate.

[0042] The speed increaser 14 is used to increase the speed of the output shaft 15. Although a device for ensuring speed is installed in front of the speed increaser 14, the development trend of the speed is still decreasing. Therefore, installing the speed increaser 14 in front of the generator 16 can increase the rotation speed to a certain extent.

[0043] In this embodiment, buffering, overload protection, and vibration damping technologies are adopted at multiple positions. For example, the vibration damping element 3 can effectively relieve the impact on the input shaft 6. The clay buffer 21 located between the wave energy capture float 1 and the device can prevent the wave energy capture float 1 from hitting the transmission system in severe sea conditions, protecting the float and the transmission system. At the same time, the load distribution is carried out by adopting the multi-point input method, which is beneficial to reducing the load on the gear rack. The torque limiter 7 can play an overload protection role to avoid impact overload. The vibration damping element 3 can play a role in system vibration damping and reducing dynamic load. The flywheel 13 and the 3S clutch 12 can play a role in stabilizing the speed, reducing the impact and stability of the transmission system. The speed increasing mechanism can play an overload protection and vibration reduction role. Through the above measures, the reliability of the transmission system and the stability of power generation can be greatly improved.

[0044] Embodiment 2:

[0045] This embodiment provides a working method for a mechanical transmission wave energy power generation device. Using the device described in Embodiment 1, multiple wave energy capture floats 1 form a multi-point input structure. As the waves rise and fall, the rack 4 makes the same movement and then drives the cooperating gear 5 to rotate, realizing the conversion of linear - rotary motion; the energy of the rotary motion is transmitted to the generator 16 through the bevel gear set and the speed increasing mechanism.

[0046] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A mechanical transmission wave energy power generation device, characterized in that, It includes multiple wave energy capture floats arranged at intervals, and each wave energy capture float is connected to a vertically arranged rack. The rack meshes with a gear, and each gear is installed on the same input shaft; One end of the input shaft is connected to a damping element, and the other end is successively installed with a torque limiter, a one-way clutch, and a bevel gear set; The bevel gear set is connected to a generator through an output shaft, and a speed increasing mechanism is installed on the output shaft; The damping element includes a driving disc and multiple groups of damping elements arranged on one side of the driving disc. One end of the damping element is connected to the input shaft and is evenly distributed along the circumferential direction of the input shaft; The damping element includes a damper, a spring, and a driven element. The damper and the spring are arranged in parallel. One end of both is connected to the input shaft, and the other end is connected to the driven disc; The rack cooperates with a guide rail, and the rack moves up and down along the guide rail in the motion state of the wave energy capture float; The guide rail is fixed to one side of the frame, and the guide rail is covered by the frame housing; An installation groove is formed on the top surface of the wave energy capture float, and one end of the rack is fitted with the installation groove and is connected to the wave energy capture float through a connecting piece.

2. The mechanical drive wave energy power generation device according to claim 1, wherein The speed increasing mechanism includes a 3S clutch, a flywheel, and a speed increaser arranged in sequence from one end close to the bevel gear set to the other end.

3. A mechanical transmission wave energy power generation device according to claim 1, characterized in that The bottom surface of the wave energy capture float is an arc surface.

4. A mechanical transmission wave energy generation device according to claim 1, characterized in that, The bevel gear set includes a first bevel gear, a second bevel gear, and a third bevel gear. The second bevel gear is installed on the output shaft, the first bevel gear and the third bevel gear are respectively installed on the input shaft, and the second bevel gear meshes between the first bevel gear and the third bevel gear.

5. The working method of a mechanical transmission wave energy power generation device according to any one of claims 1-4, characterized in that Multiple wave energy capture floats form a multi-point input structure. As the waves rise and fall, the rack makes the same movement and then drives the gears that cooperate with it to rotate, realizing the conversion of linear - rotary motion; The energy of the rotary motion is transmitted to the generator through the bevel gear set and the speed increasing mechanism.

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