CN209892377U

CN209892377U - Vertical axis tidal current energy power generation device

Info

Publication number: CN209892377U
Application number: CN201920526101.0U
Authority: CN
Inventors: 李增亮; 王萌; 范梦浩; 都晓鹏; 孙召成
Original assignee: China University of Petroleum East China
Current assignee: China University of Petroleum East China
Priority date: 2019-04-18
Filing date: 2019-04-18
Publication date: 2020-01-03
Anticipated expiration: 2029-04-18

Abstract

The utility model relates to a tidal current energy power generation device, especially a vertical axis tidal current energy power generation device. The power generation device comprises an auxiliary starting water turbine, a connecting block, a main water turbine, a rotating shaft, a first bevel gear, a control cabinet, a second bevel gear, a generator, a connection and disconnection device and the like, wherein when the flow rate of seawater is low, the resistance type auxiliary starting water turbine is used for starting the lift type main water turbine in an auxiliary mode, so that the main water turbine can also rotate at the low flow rate of the seawater, and the integral power generation power is improved; when the flow velocity of the seawater is high, the resistance type auxiliary starting water turbine and the lift type main water turbine operate independently, the lift type main water turbine is not tired, the main water turbine drives the rotating shaft to rotate to generate power independently, and the power generation power is greatly improved; the main water turbine adopts the double-layer blade with the end plate, the end plate can effectively restrain the vortex at the end part of the blade and improve the output power, and the double-layer blade is larger in torque and higher in power than the single-layer blade.

Description

Vertical axis tidal current energy power generation device

Technical Field

The utility model relates to a tidal current energy power generation device, especially a vertical axis tidal current energy power generation device.

Background

Abundant energy is stored in the ocean, the ocean energy is not developed deeply at present, and for ocean energy power generation, the ocean energy power generation system is safe, reliable and pollution-free, has a better development prospect, and can effectively alleviate the problems of energy crisis and climate warming existing at present if the ocean energy can be effectively and fully developed and utilized. Tidal current energy is one of ocean energies, has a better development prospect, and has the following advantages compared with wind power generation: the density of the seawater is eight hundred times of that of the air, and the energy density is concentrated; the tidal current flow has strong regularity and can be predicted.

Tidal current energy power generation devices can be roughly divided into two categories: the vertical axis tidal current energy power generation device is characterized by simple structure, no need of additional convection devices, low maintenance cost, and more receiving attention and favor of domestic and foreign scholars, and the current vertical axis tidal current energy power generation devices are roughly divided into two types: the resistance type vertical axis tidal current energy power generation device is small in starting torque, easy to self-start, low in rotating speed and low in power generation power; the lift type vertical axis tidal current energy power generation device is high in rotating speed and generating power, but is large in starting torque and not easy to self-start, and a device capable of effectively combining the lift type vertical axis tidal current energy power generation device and the vertical axis tidal current energy power generation device is absent at present.

SUMMERY OF THE UTILITY MODEL

The utility model provides a vertical axis trend can power generation facility aims at effectively combining resistance type vertical axis trend can power generation facility and lift type vertical axis trend can power generation facility in order to improve the generating power, and the technical scheme of its adoption is as follows:

a vertical axis tidal current energy power generation device comprises an auxiliary starting water turbine, a connecting block, a first bearing, a first shaft bearing, a first supporting frame, a main water turbine, a rotating shaft, a second supporting frame, a second bearing, a waterproof shell, a second shaft bearing, a base, a first bevel gear, a control cabinet, a second bevel gear, a power generator, screws and a connection and separation device, wherein the auxiliary starting water turbine is a resistance type water turbine, the lower end of the auxiliary starting water turbine is fixed at the upper end of the connecting block through four screws, the lower end of the connecting block is movably connected with the upper end of the rotating shaft, the first bearing is fixedly installed above the rotating shaft, the second bearing is fixedly installed below the rotating shaft, the first shaft bearing is in interference fit with the outer ring of the first bearing, the second bearing is in interference fit with the outer ring of the second bearing, four first supporting frames are fixedly installed on the circumference of, four second support frames are fixedly arranged on the circumference of the outer wall of the second shaft support, the lower ends of the second support frames are fixedly arranged on the base, the main water turbine is a lift-type water turbine, the main water turbine is fixedly arranged in the middle of a rotating shaft, the main water turbine adopts double-layer blades with end plates, the first bevel gear is fixedly arranged at the lower end of the rotating shaft, the rotating shaft of the generator is fixedly connected with a second bevel gear, the second bevel gear is meshed with the first bevel gear, the generator is fixedly arranged on the base, the control cabinet is fixed on the base, and is positioned below the first bevel gear, waterproof shells are arranged outside the first bevel gear, the control cabinet, the second bevel gear and the generator, the lower extreme of waterproof casing is fixed on the base, connect the disengaging gear and be provided with four, all install on the rotation axis, connect the disengaging gear and be connected with the switch board electricity.

Preferably, the auxiliary starting hydraulic turbine includes connecting axle, fixed mounting at the upper end plate of connecting axle upper end, fixed mounting at the lower end plate of connecting axle lower extreme, auxiliary starting hydraulic turbine blade, lower end plate screw hole, the lower terminal surface of lower end plate sets up the lower end plate screw hole of four circumference equipartitions, the upper end fixed mounting of auxiliary starting hydraulic turbine blade is on the upper end plate, and lower extreme fixed mounting is on the lower end plate, the lower end plate lower extreme is through four fix with screws in the connecting block upper end.

Preferably, the connecting block includes connecting portion, circumference equipartition at the screw through-hole on last connecting portion, set up circular recess, fixed connection at the lower connecting portion of last connecting portion lower extreme, the cylinder through-hole of through connection piece, the spread groove that put at last connecting portion up end central point, the screw through-hole is provided with four, four spread grooves of circumference equipartition on the pore wall of cylinder through-hole, the screw passes screw through-hole screw in lower end plate screw hole.

Preferably, the rotating shaft comprises a rotating shaft main body, a rotating shaft groove, a circular boss fixedly connected to the top end of the rotating shaft main body, and a rotating shaft through hole penetrating through the rotating shaft, the rotating shaft groove is uniformly distributed on the rotating shaft main body in four horizontal directions, the rotating shaft groove is communicated with the rotating shaft through hole, the connection and disconnection device is installed on the rotating shaft groove, the circular boss is matched with the circular groove, the depth of the circular groove is equal to the height of the circular boss, the diameter of the circular groove is equal to that of the circular boss, the rotating shaft main body is matched with the cylindrical through hole, the diameter of the rotating shaft main body is equal to that of the cylindrical through hole, a first bevel gear is fixedly installed at the lower end of the rotating shaft main body, a main water turbine is fixedly installed in the middle of the, A second bearing.

Preferably, connect the disengaging gear and include magnet, spring, movable block, the movable block contains the electro-magnet, the one end and the magnet fixed connection of spring, the other end and movable block fixed connection, magnet is fixed in the rotation axis recess, and is located the one end that the rotation axis recess is close to the rotation axis through-hole, the lateral wall of movable block and the lateral wall cooperation of rotation axis recess, movable block and rotation axis recess swing joint.

The utility model has the advantages of as follows:

(1) when the flow velocity of the seawater is low, the resistance type auxiliary starting water turbine is used for starting the lift type main water turbine in an auxiliary mode, so that the main water turbine can also rotate at the low flow velocity of the seawater, and the integral power generation power is improved.

(2) When the sea water velocity of flow is higher, the resistance type auxiliary start hydraulic turbine and the main hydraulic turbine of lift type operate independently, do not arrear the main hydraulic turbine of lift type, and the main hydraulic turbine drives the rotation axis alone and rotates the electricity generation, has improved the generating power greatly.

(3) The main water turbine adopts the double-layer blade with the end plate, the end plate can effectively restrain the vortex at the end part of the blade and improve the output power, and the double-layer blade is larger in torque and higher in power than the single-layer blade.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1: the utility model relates to an integral structure schematic diagram of a vertical axis tidal current energy power generation device;

FIG. 2: the utility model relates to a three-dimensional structure schematic diagram of a vertical axis tidal current energy power generation device;

FIG. 3: the utility model relates to a front view of a vertical axis tidal current energy power generation device;

FIG. 4: the utility model relates to a first structure schematic diagram of an auxiliary starting water turbine of a vertical axis tidal current energy power generation device;

FIG. 5: the utility model relates to a second structure schematic diagram of an auxiliary starting water turbine of a vertical axis tidal current energy power generation device;

FIG. 6: the utility model relates to a schematic diagram of a sectional structure of a connecting block of a vertical axis tidal current energy power generation device;

FIG. 7: the utility model relates to a schematic diagram of a rotating shaft structure of a vertical shaft tidal current energy power generation device;

FIG. 8: the utility model relates to a schematic drawing of a retraction sectional structure of a movable block of a vertical shaft tidal current energy power generation device;

FIG. 9: the utility model relates to a schematic structural diagram of a movable block of a vertical axis tidal current energy power generation device;

FIG. 10: the utility model relates to a retraction schematic diagram of a movable block of a vertical axis tidal current energy power generation device;

FIG. 11: the utility model relates to a vertical axis tidal current energy power generation device with a movable block popping out a schematic sectional structure diagram;

FIG. 12: the utility model relates to a vertical axis trend can power generation facility's movable block pops out the schematic diagram.

Description of the symbols:

1. an auxiliary starting water turbine 2, a connecting block 3, a first bearing 4, a first shaft support 5, a first support frame 6, a main water turbine 7, a rotating shaft 8, a second support frame 9, a second bearing 10, a waterproof shell 11, a second shaft support 12, a base 13, a first bevel gear 14, a control cabinet 15, a second bevel gear 16, a generator 17, a screw 18, a connection and disconnection device 101, the hydraulic turbine blade starting assisting device comprises an upper end plate, 102, a connecting shaft, 103, a lower end plate, 104, an auxiliary starting turbine blade, 105, a lower end plate threaded hole, 201, an upper connecting portion, 202, a threaded through hole, 203, a circular groove, 204, a lower connecting portion, 205, a cylindrical through hole, 206, a connecting groove, 701, a rotating shaft main body, 702, a rotating shaft groove, 703, a circular boss, 704, a rotating shaft through hole, 1801, a magnet, 1802, a spring, 1803 and a movable block.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The terms "first," "second," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The invention will be further described with reference to the following figures and examples:

as shown in fig. 1 to 3 and fig. 8, the vertical axis tidal current energy power generation device of the present invention comprises an auxiliary starting water turbine 1, a connection block 2, a first bearing 3, a first bearing 4, a first support frame 5, a main water turbine 6, a rotation shaft 7, a second support frame 8, a second bearing 9, a waterproof housing 10, a second bearing 11, a base 12, a first bevel gear 13, a control cabinet 14, a second bevel gear 15, a generator 16, a screw 17, and a connection and disconnection device 18, wherein the auxiliary starting water turbine 1 is a resistance type water turbine, the lower end of the auxiliary starting water turbine is fixed on the upper end of the connection block 2 through four screws 17, the rotation of the auxiliary starting water turbine 1 drives the connection block 2 to synchronously rotate, the lower end of the connection block 2 is movably connected with the upper end of the rotation shaft 7, the first bearing 3 is fixedly installed above the rotation shaft 7, the second bearing 9 is fixedly installed below, the inner ring of the second bearing 9 is in interference fit with the rotating shaft 7, the first bearing 4 is in interference fit with the outer ring of the first bearing 3, the first bearing 4 is in a hollow cylinder shape, the lower end of the first bearing is provided with a baffle ring for axially positioning the first bearing 3, the second bearing 11 is in interference fit with the outer ring of the second bearing 9, the second bearing 11 is in a hollow cylinder shape, the lower end of the second bearing is provided with a baffle ring for axially positioning the second bearing 9, four first support frames 5 are fixedly installed on the circumference of the outer wall of the first bearing 4, the lower end of each first support frame 5 is fixedly installed on the base 12, for example, the upper end of each first support frame 5 is welded with the first bearing 4, the lower end of each first support frame is welded with the base 12, four second support frames 8 are fixedly installed on the circumference of the outer wall of the second bearing 11, the lower ends of the second support frames 8 are, the lower end is welded with a base 12, the main water turbine 6 is a lift type water turbine and is fixedly arranged in the middle of a rotating shaft 7, the main water turbine 6 adopts double-layer blades with end plates, the end plates can effectively inhibit vortex at the end parts of the blades and improve output power, the double-layer blades are higher in torque and higher in power than single-layer blades, the flow rate of water required by starting the main water turbine 6 is higher than that of water required by starting the auxiliary starting water turbine 1, a first bevel gear 13 is fixedly arranged at the lower end of the rotating shaft 7, illustratively, the first bevel gear 13 can be in key connection with the rotating shaft 7, a rotating shaft of a generator 16 is fixedly connected with a second bevel gear 15, illustratively, the rotating shaft of the generator 16 can be in key connection with the second bevel gear 15, the second bevel gear 15 is meshed with the first bevel gear 13, the generator 16 is fixedly arranged on, the control cabinet 14 is fixed on the base 12 and is located below the first bevel gear 13, the control cabinet 14, the second bevel gear 15 and the generator 16 are provided with four waterproof housings 10 on the outer sides, the first bevel gear 13, the control cabinet 14, the second bevel gear 15 and the generator 16 are prevented from being affected by seawater intrusion, the lower end of each waterproof housing 10 is fixed on the base 12, four connecting and disconnecting devices 18 are arranged and are installed on the rotating shaft 7, the connecting and disconnecting devices 18 are electrically connected with the control cabinet 14, and a flow rate meter electrically connected with the control cabinet 14 is installed on the outer side wall of each waterproof housing 10.

As shown in fig. 3 to 5, the starting-assisted water turbine 1 includes a connecting shaft 102, an upper end plate 101 fixedly mounted on the upper end of the connecting shaft 102, a lower end plate 103 fixedly mounted on the lower end of the connecting shaft 102, starting-assisted water turbine blades 104, lower end plate screw holes 105, the lower end face of the lower end plate 103 is provided with four lower end plate screw holes 105 uniformly distributed circumferentially, for example, the upper end plate 101 can be welded on the upper end of the connecting shaft 102, the lower end plate 103 can be welded on the lower end of the connecting shaft 102, the diameter of the upper end plate 101 is equal to that of the lower end plate 103, the thickness of the upper end plate 101 is equal to that of the lower end plate 103, the upper end of the starting-assisted water turbine blades 104 is fixedly mounted on the upper end plate 101.

As shown in fig. 3 to 6, the connection block 2 includes an upper connection portion 201, through-thread holes 202 circumferentially and uniformly distributed on the upper connection portion 201, a circular groove 203 formed in the center of the upper end surface of the upper connection portion 201, a lower connection portion 204 fixedly connected to the lower end of the upper connection portion 201, a cylindrical through-hole 205 penetrating through the connection block 2, and four connection grooves 206, the through-thread holes 202 are provided, for example, the lower end of the upper connection portion 201 and the upper end of the lower connection portion 204 can be fixed by welding, the two can also be of an integrated structure, four connection grooves 206 are circumferentially and uniformly distributed on the hole wall of the cylindrical through-hole 205, and the screws.

As shown in fig. 6 to 8, the rotating shaft 7 includes a rotating shaft main body 701, a rotating shaft groove 702, a circular boss 703 fixedly connected to the top end of the rotating shaft main body 701, and a rotating shaft through hole 704 penetrating through the rotating shaft 7, four rotating shaft grooves 702 in the horizontal direction are uniformly distributed on the circumference of the rotating shaft main body 701, the rotating shaft groove 702 is communicated with the rotating shaft through hole 704, the connection and disconnection device 18 is installed on the rotating shaft groove 702, a collecting ring is installed in the rotating shaft through hole 704, a wire is provided on the connection and disconnection device 18 to be connected to the collecting ring, the wire passes through the collecting ring and is led out from the bottom end of the rotating shaft main body 701 to be connected to the control cabinet 14 arranged below the rotating shaft 7, the collecting ring can prevent the wire from winding when the rotating shaft 7 rotates, the circular boss 703 is matched with the circular groove 203, the lower end, the depth of the circular groove 203 is equal to the height of the circular boss 703, the diameter of the circular groove 203 is equal to the diameter of the circular boss 703, the circular boss 703 can rotate in the circular groove 203, the rotating shaft main body 701 is matched with the cylindrical through hole 205, the diameter of the rotating shaft main body 701 is equal to the aperture of the cylindrical through hole 205, the lower end of the rotating shaft main body 701 is fixedly provided with the first bevel gear 13, the middle of the rotating shaft main body 701 is fixedly provided with the main water turbine 6, and the rotating shaft main body 701 is fixedly provided with the first bearing 3 and the second bearing 9.

As shown in fig. 8 to 10, the connection and disconnection device 18 includes a magnet 1801, a spring 1802, and a movable block 1803, the movable block 1803 contains an electromagnet, one end of the spring 1802 is fixedly connected to the magnet 1801, the other end is fixedly connected to the movable block 1803, the magnet 1801 is fixed in the rotation axis groove 702, and is located at one end of the rotation axis groove 702 close to the rotation axis through hole 704, the side wall of the movable block 1803 is matched with the side wall of the rotation axis groove 702, the movable block 1803 is movably connected with the rotation axis groove 702, the movable block 1803 is electrically connected with the control cabinet 14 through a wire, the electromagnet in the movable block 1803 has the magnetic property with the polarity opposite to that of the magnet 1801 when being electrified, and the magnetic property disappears after being powered off, as shown in fig. 8 and 10, when the electromagnet in the movable block 1803 is energized, the movable block 1803 compresses the spring 1802 and approaches the magnet 1801, the movable blocks 1803 are all positioned in the rotating shaft groove 702, and the rotation of the connecting block 2 does not influence the rotation of the rotating shaft 7; as shown in fig. 11 and 12, after the electromagnet in the movable block 1803 is powered off, the compressed spring 1802 drives the movable block 1803 to be away from the magnet 1801 in the process of restoring to the original state, so that a part of the movable block 1803 is located in the rotation axis groove 702, the other part is inserted into the connection groove 206, the rotation of the connection block 2 can drive the rotation axis 7 to rotate, and further drive the main water turbine 6 to rotate, and the control cabinet 14 is internally provided with a storage battery for supplying power to each electric component.

The vertical axis tidal current energy power generation device is installed on the sea bottom, when the flow velocity of seawater is low, a flow velocity meter which is installed outside a waterproof shell 10 and electrically connected with a control cabinet 14 monitors that the flow velocity of seawater does not reach the starting flow velocity of a main water turbine 6 but reaches the starting flow velocity of an auxiliary starting water turbine 1, the main water turbine 6 cannot be started automatically, the auxiliary starting water turbine 1 can be started automatically, a control circuit of the control cabinet 14 is disconnected, so that an electromagnet in a movable block 1803 is powered off, the compressed spring 1802 drives the movable block 1803 to be far away from the magnet 1801 in the process of recovering the original state, so that one part of the movable block 1803 is positioned in a rotating shaft groove 702, the other part of the movable block 1803 is inserted into a connecting groove 206, the auxiliary starting water turbine 1 drives a connecting block 2 to rotate after being started automatically, the rotating connecting block 2 drives a rotating shaft 7 to rotate through, the main water turbine 6 can also rotate at a low seawater flow rate, the rotation of the rotating shaft 7 drives the generator 16 to generate electricity through the meshing transmission of the first bevel gear 13 and the second bevel gear 15, the electricity generated by the generator 16 is led out to the position above the sea level through a cable, the main water turbine 6 can also rotate at the low seawater flow rate, and the overall power generation power of the tidal current energy power generation device is improved.

When the flow rate of seawater is higher than the starting flow rate of the main water turbine 6, the main water turbine 6 can be started automatically without auxiliary starting of the auxiliary starting water turbine 1, at the moment, the main water turbine 6 alone drives the power generation power of the rotation shaft 7 to rotate is higher than the power generation power of the auxiliary starting water turbine 1 and the main water turbine 6 which rotate synchronously to drive the rotation shaft 7 to rotate, a control circuit of a control cabinet 14 is communicated with an electromagnet in a movable block 1803 to be electrified, a compression spring 1802 of the movable block 1803 is close to the magnet 1801, so that the movable block 1803 is completely positioned in a rotation shaft groove 702, at the moment, a connecting block 2 and the rotation shaft 7 can rotate relatively, the rotation of the connecting block 2 cannot drive the rotation shaft 7 to rotate, the main water turbine 6 and the auxiliary starting water turbine 1 rotate respectively, at the moment, the main water turbine 6 drives the rotation, the electricity generated by the generator 16 is led out above the sea level through a cable, and the main water turbine 6 independently drives the rotating shaft 7 to rotate for generating electricity, so that the generating power is greatly improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A vertical axis tidal current energy power generation device is characterized in that: the auxiliary starting water turbine is a resistance type water turbine, the lower end of the auxiliary starting water turbine is fixed at the upper end of the connecting block through four screws, the lower end of the connecting block is movably connected with the upper end of the rotating shaft, the first bearing is fixedly installed above the rotating shaft, the second bearing is fixedly installed below the rotating shaft, the first bearing is in interference fit with the outer ring of the first bearing, the second bearing is in interference fit with the outer ring of the second bearing, the four first support frames are fixedly installed on the circumference of the outer wall of the first bearing, and the lower end of the first support frame is fixedly installed on the base, four second support frames are fixedly arranged on the circumference of the outer wall of the second shaft support, the lower ends of the second support frames are fixedly arranged on the base, the main water turbine is a lift-type water turbine, the main water turbine is fixedly arranged in the middle of a rotating shaft, the main water turbine adopts double-layer blades with end plates, the first bevel gear is fixedly arranged at the lower end of the rotating shaft, the rotating shaft of the generator is fixedly connected with a second bevel gear, the second bevel gear is meshed with the first bevel gear, the generator is fixedly arranged on the base, the control cabinet is fixed on the base, and is positioned below the first bevel gear, waterproof shells are arranged outside the first bevel gear, the control cabinet, the second bevel gear and the generator, the lower extreme of waterproof casing is fixed on the base, connect the disengaging gear and be provided with four, all install on the rotation axis, connect the disengaging gear and be connected with the switch board electricity.

2. The vertical axis tidal current energy power generation device of claim 1, wherein: the auxiliary starting water turbine comprises a connecting shaft, an upper end plate fixedly mounted at the upper end of the connecting shaft, a lower end plate fixedly mounted at the lower end of the connecting shaft, auxiliary starting water turbine blades and lower end plate threaded holes, wherein the lower end face of the lower end plate is provided with four lower end plate threaded holes uniformly distributed on the circumference, the upper end of each auxiliary starting water turbine blade is fixedly mounted on the upper end plate, the lower end of each auxiliary starting water turbine blade is fixedly mounted on the lower end plate, and the lower end of the lower end plate is fixed to the.

3. The vertical axis tidal current energy power generation device of claim 1, wherein: the connecting block includes connecting portion, circumference equipartition at the screw thread through-hole on last connecting portion, set up circular recess, fixed connection at last connecting portion lower extreme connecting portion, the cylinder through-hole of through connection piece, spread groove that last connecting portion up end central point put, the screw thread through-hole is provided with four, four spread grooves of circumference equipartition on the pore wall of cylinder through-hole, the screw passes screw thread through-hole screw in lower end plate screw hole.

4. The vertical axis tidal current energy power generation device of claim 1, wherein: the rotating shaft comprises a rotating shaft main body, a rotating shaft groove, a round boss fixedly connected to the top end of the rotating shaft main body, and a rotating shaft through hole penetrating through the rotating shaft, four rotating shaft grooves in the horizontal direction are uniformly distributed on the circumference of the rotating shaft main body, the rotating shaft grooves are communicated with the rotating shaft through holes, the connecting and disconnecting device is arranged on the groove of the rotating shaft, the circular boss is matched with the circular groove, the depth of the circular groove is equal to the height of the circular boss, the diameter of the circular groove is equal to the diameter of the circular boss, the main body of the rotating shaft is matched with the cylindrical through hole, the diameter of the main body of the rotating shaft is equal to the aperture of the cylindrical through hole, the lower end of the rotating shaft main body is fixedly provided with a first bevel gear, the middle of the rotating shaft main body is fixedly provided with a main water turbine, and the rotating shaft main body is fixedly provided with a first bearing and a second bearing.

5. The vertical axis tidal current energy power generation device of claim 1, wherein: the connection and separation device comprises a magnet, a spring and a movable block, wherein the movable block is internally provided with an electromagnet, one end of the spring is fixedly connected with the magnet, the other end of the spring is fixedly connected with the movable block, the magnet is fixed in a rotary shaft groove and is located at one end, close to a rotary shaft through hole, of the rotary shaft groove, the side wall of the movable block is matched with the side wall of the rotary shaft groove, and the movable block is movably connected with the rotary shaft groove.