1. The utility model provides a small-size offshore wind turbine generator system of independently floating and sinking to wind which characterized in that: the offshore wind power generation unit comprises a trunk (1), a machine head (2) and a floating platform (4), wherein the machine head (2) is installed at the upper end of the trunk (1) and used for wind power generation, the floating platform (4) is connected below the trunk (1), the floating platform (4) is suspended in seawater below the sea level, and the floating platform (4) supports the trunk (1) in the vertical direction;

the offshore wind turbine generator system further comprises an opposite block (3), the opposite block (3) is sleeved on the main stem (1), the opposite block (3) floats on the sea level, and the opposite block (3) is impacted by water flow to enable the offshore wind turbine generator system to rotate around a vertical axis in water;

the opposite direction block (3) comprises a floating block (31), a connecting cylinder (32), a rudder blade (33), a spring (34) and a key (35), wherein the key (35) is in a long strip shape, the key (35) is vertically nailed on the trunk (1) through a screw, the floating block (31) with a central hole is installed at the upper end of the connecting cylinder (32), a vertical key groove (321) is formed in the inner surface of the connecting cylinder (32), the connecting cylinder (32) and the floating block (31) are sleeved on the trunk (1) together, the key groove (321) is aligned with the key (35), the groove width of the key groove (321) is larger than that of the key (35), two springs (34) using the key (35) as a symmetrical line are arranged between two side walls of the key groove (321) and two side walls of the key (35), and the rudder blade (33) is arranged on the outer surface of the connecting cylinder (32) along the horizontal direction.

2. A self-ballasted small offshore wind power plant according to claim 1, wherein: one end of the spring (34) close to the key (35) is contacted with the key (35) through the rolling ball (36).

3. A self-ballasted small offshore wind power plant according to claim 1, wherein: the floating platform (4) is also connected with an anchor cable (6).

Background

The sea has a large amount of sea wind, and the use of the sea wind for wind power generation is a new clean energy.

In the prior art, most offshore wind power generation is carried out by a fixed unit, a pile is driven at a position where power generation is needed to be carried out to be used as a foundation, then a wind power generation unit is built on the pile, the construction amount is large, and the offshore wind power generation is not suitable for a water area with large sea depth.

Sea wind often has seasonal nature, so fixed offshore wind turbines often have waste in use time and are almost unable to generate electricity in fixed seasons.

There are some floating platform type wind power generation units, however, for the stability of the unit, the floating platform is often made very large, and is also fixed by pulling with the seabed through ropes and the like, and the ropes and the seabed also need to be connected more firmly, otherwise, the whole floating platform is easily shocked by ocean currents and largely shakes.

Disclosure of Invention

The invention aims to provide a small offshore wind turbine generator which is self-floating and sinking and faces wind, and aims to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a small-size offshore wind power generation unit of independently floating and sinking to wind, includes trunk, aircraft nose and floats and sinks the platform, and trunk upper end installation aircraft nose is used for wind power generation, floats and sinks the platform and connects in the trunk below, floats and sinks the platform and suspends in the sea water of sea level below, floats and sinks the platform and holds the trunk along vertical direction.

The main body supports the head part and leads the head part to face the wind on the sea surface for wind power generation, the invention does not adopt the mode of building a foundation on the sea bottom for unit support, but uses the floating and sinking platform and the auxiliary part thereof to provide buoyancy to lift the whole unit, the floating and sinking platform sinks into the sea and hovers at a proper position, the proper position is positioned at a deeper depth below the sea surface, because the buoyancy is used for balancing the gravity of the unit, the structural size of the buoyancy part is larger, the floating and sinking platform and the auxiliary part thereof directly float on the sea surface and can be obviously influenced by ocean current, the sea wind blows the surface water body to flow near the sea surface, the fluidity is influenced by the wind power and has different speeds, the position capable of carrying out wind power generation is the position with strong wind, the surface water body has strong fluidity, the invention sinks the floating platform into the deep water position, only leads a relatively thin main body to pass through the surface water body, therefore, when the surface water flows through the trunk, the impact force on the whole unit is small, the water flow speed at the deep water position is low, and the influence of sea wind at the position with more water depth is avoided without considering the deep water undercurrent caused by the action of tide force on the whole ocean and the large-range temperature difference of the earth (the undercurrent is also mostly generated at the position far away from the continental shelf, but the wind turbine generator is not arranged too far away from the continental shelf), and the floating platform is not easy to be impacted by the sea current when hovering at the position, so that the stable buoyancy is provided. The set supported by buoyancy can be conveniently shifted to a set position by a tugboat, and a proper working place is selected according to different seasons.

Furthermore, a plurality of floating body components are arranged on the periphery of the floating platform in the horizontal direction, and the floating body components have self-adaptive buoyancy which changes along with depth fluctuation.

If the floating platform only has a buoyancy providing part, the danger that the unit topples can occur due to ocean current impact, therefore, a plurality of floating body assemblies are arranged by extending the horizontal part outwards, when the unit is inclined towards one side, the floating body assembly with the sinking trend increases the self drainage volume through the self or a connecting pipe and other parts, and provides more buoyancy, so that the unit is restored to the vertical state again.

Further, the floating body assembly comprises an air bag, an air pump, an air inlet pipe, an air outlet pipe, a pressure regulating valve and a floater on-off block, the air bag is fixed on the periphery of the floating platform, the air pump is arranged in the air bag, the air pump extracts air from the upper side of the sea level through the air inlet pipe and injects the air into the air bag, the air outlet pipe is connected with the inner space of the air bag and the air space above the sea level, the pressure regulating valve with adjustable flow resistance is arranged on the air outlet pipe, the air inlet pipe and the air outlet pipe are provided with the floater on-off block at the position of the sea level, and the air inlet pipe has surplus length from the sea level to the air bag.

The gasbag is drainage component, and the drainage is more, and buoyancy is bigger, and the aspiration pump is taken out atmosphere and is irritated into in the gasbag, makes it keep certain volume, and business turn over trachea carries out the tonifying qi and giving vent to anger of gasbag as the gas circuit respectively, and relative to the pressure difference value in outlet duct exit in the gasbag of air-vent valve allotment, the sea level atmosphere is directly connected to the outlet duct exit, and the flow resistance of air-vent valve is the gauge pressure in the gasbag promptly, and gasbag internal pressure is bigger, and then same degree of depth department volume is bigger in the sea water, provides bigger buoyancy. The float on-off block can cut off the connection between the air outlet pipe and the atmosphere on the sea surface after the float on-off block is completely immersed in water, the air inlet pipe has more surplus length, therefore, even if the air bag connected below the air inlet pipe sinks a little, the air inlet of the air pump cannot be influenced, the air outlet pipe has no surplus length, and the length of the air outlet pipe is just equal to the distance from the air bag to the sea surface, so that once the connected air bag sinks a little bit due to disturbance, the air exhaust of the air bag to the outside is cut off, the air pump continues to operate, more gas is stored in the air bag, the volume is slightly expanded, the air bag has larger buoyancy compared with other air bags, the disturbance is resisted, the unit returns to the main vertical state, after the air bag is completely reset, the end part of the air outlet pipe led out from the air bag floats out of the sea surface again, the air bag exhausts smoothly after passing through the pressure regulating valve, and discharges the gas which is more than that of other air bags, the air cells return to the same size, equally providing buoyancy to the flotation platform. The function of autonomously adjusting the offset posture is achieved. The pressure of the pressure regulating valve corresponds to the internal pressure of the air bag, the pressure also corresponds to the depth of the floating platform, when the unit is initially set, the pipe lengths of the air inlet pipe and the air outlet pipe need to be adjusted, specifically, the larger pipe length can be manufactured, and after the depth of the air bag is determined, the surplus length of the air outlet pipe is eliminated in a bundling mode.

Furthermore, one end of the air outlet pipe close to the sea level is provided with an air pipe floater and an overflowing ball body, an air hole connected with a main air flow through hole of the air outlet pipe is formed in the overflowing ball body, the floater on-off block is in a lotus shape, a cone groove is formed in the upper surface of the floater on-off block in the direction of the center, the tip of the cone groove is connected to the lower surface of the floater on-off block through the through hole, the upper end of the air outlet pipe penetrates through the floater on-off block, the air pipe floater is located below the floater on-off block, the overflowing ball body is located in the cone groove, the air hole faces towards the inclined plane of the cone groove, and when the air pipe floater butts against the lower surface of the floater on-off block, a gap is reserved between the air hole and the inclined plane of the cone groove.

When the float on-off block is positioned on the sea level, the end part of the air outlet pipe floats upwards by the buoyancy directly provided by the air pipe float, the overflowing sphere is higher than the bevel groove slope, namely, an air hole exhausting outwards in the overflowing sphere can exhaust freely, at the moment, the outer upper surface of the air pipe float is abutted against the lower surface of the float on-off block, when the air outlet pipe is dragged by the lower air bag and enters water, the float on-off block moves upwards by the buoyancy, at the moment, the overflowing sphere is contacted with the bevel groove, the air hole is sealed by the bevel groove slope, for better sealing, a spherical groove matched with the spherical surface of the overflowing sphere can be arranged on the bevel groove slope, the outer upper surface of the air pipe is separated from the lower surface of the float on-off block by a distance, the air in the air bag is almost reduced to the atmospheric pressure after passing through the pressure regulating valve, therefore, the jacking force of the air hole to the float on-off block is very, therefore, the air hole can be perfectly sealed by the cone groove, the pressure of the air bag can keep the pressure of the external water body in the subsequent air injection process, and the injected air is used for increasing the volume.

Furthermore, a one-way valve flowing from the atmosphere to the air bag is arranged on the air inlet pipe, the air extracting pump and the pressure regulating valve are controlled in an interlocking mode, and when the air extracting pump stops, the pressure regulating valve is closed. This structure prevents that air pump from losing the quick exhaust of back gasbag and losing buoyancy and causing the unit to sink into aquatic when the electricity is shut down, and when air pump shut down, the air-vent valve is closed and is prevented that gas from discharging from the outlet duct in the gasbag, and the check valve in the intake pipe has also prevented gas from exhausting from air pump, the intake pipe is reverse.

Further, marine wind turbine generator system still includes subtend piece, and subtend piece suit is on the trunk, and subtend piece floats in sea level position department, and subtend piece receives the rivers to strike and makes marine wind turbine generator system whole carry out the rotation around vertical axis in aqueous. The subtend piece includes the floating block, the connecting cylinder, the rudder blade, spring and key, and the key is rectangular shape, and the key passes through the vertical nail dress of screw on the trunk, and the floating block of taking the centre bore is installed to the connecting cylinder upper end, and the connecting cylinder internal surface sets up vertical keyway, and the connecting cylinder is together overlapped on the trunk with the floating block, and the keyway is aligned with the key, and keyway groove width is greater than key width, sets up two springs of making the line of symmetry with the key between keyway both sides wall and the key both sides wall, and the connecting cylinder outward appearance sets up the rudder blade along the horizontal direction.

The rudder blade is impacted by water flow to give a main rotating moment, the groove widths of the two springs, the key and the key groove are larger than the key width, and the springs are arranged in the key groove, so that the main rotating is driven to rotate only when the key groove continuously compresses the key from one direction due to the rotation of the rudder blade, and the water flow fluctuation is eliminated by the springs.

The floating block enables the opposite block to float and stop at the sea level, the water flow is influenced by sea wind mostly and has directionality, and when the rudder blade area is enough, the impact and the moment of the water flow can enable the whole unit to rotate in situ to face the wind completely.

Further, one end of the spring close to the key is contacted with the key through the rolling ball. The floating block may float up and down, so the trunk depth is almost constant, the spring and the key have vertical sliding, and the friction is eliminated by the rolling ball.

Furthermore, the floating platform is also connected with an anchor cable. The anchor cable locks the whole horizontal position of the unit to prevent the unit from drifting along with the water flow level.

Further, the outside of the air bag is wrapped with a layer of steel wire cover. The steel wire cover protects the air bag and prevents large fishes from reaching the outer surface of the air bag.

Compared with the prior art, the invention has the beneficial effects that: the invention provides the gravity of the controllable buoyancy balancing unit by using the size-controllable air bag as the buoyancy part, and the buoyancy part is sunk into deeper water and only has a thinner trunk under the impact of ocean current near the sea surface; when whole unit slope, the gasbag outlet duct is independently sealed and is made this gasbag suppress pressure grow, provide more buoyancy, resume the vertical state of unit, the unit floats on the surface of water and is dragged to the design position by the tug, afterwards, gasbag exhaust part is gaseous, the unit is whole to sink, sink to the time of expecting the position, have the pressure that suits with outside water through the air-vent valve in keeping the gasbag, the buoyancy that provides just in time balances unit gravity, then, the aircraft nose is generated electricity to accurate sea wind, the unit can conveniently be dragged by the tug and is moved and change the power generation position.

Drawings

In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of the floating platform and floating body assembly of the present invention;

FIG. 3 is a schematic view of the structure of the end of the air outlet pipe when the float on-off block floats on the sea surface;

FIG. 4 is a schematic view of the structure of the end of the air outlet pipe after the float on-off block enters the sea;

FIG. 5 is a schematic view of the operation principle of the floating platform and floating body assembly of the present invention for tilt balance;

FIG. 6 is a schematic view of the front view of the installation of the subtending blocks on the backbone according to the present invention;

fig. 7 is view a-a of fig. 6.

In the figure: 1-trunk, 2-machine head, 3-opposite block, 31-floating block, 32-connecting cylinder, 321-key slot, 33-rudder blade, 34-spring, 35-key, 36-rolling ball, 4-floating platform, 5-floating body component, 51-air bag, 52-air pump, 53-air inlet pipe, 531-surplus length, 54-air outlet pipe, 541-air pipe float, 542-overflowing ball, 543-air hole, 55-pressure regulating valve, 56-float on-off block, 561-cone groove, 6-anchor cable, 91-shallow ocean current, 92-deep ocean current and 93-seabed.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, a small-size offshore wind power generation unit who independently floats and sinks to wind, includes trunk 1, aircraft nose 2 and floats and sinks platform 4, and installation aircraft nose 2 is used for wind power generation on trunk 1 upper end, and float and sink platform 4 is connected in trunk 1 below, and float and sink platform 4 suspends in the sea water of sea level below, and float and sink platform 4 holds up trunk 1 along vertical direction.

The main body 1 supports the machine head 2 part and enables the machine head to face wind on the sea surface for wind power generation, the machine set support is carried out in a mode of building a foundation on the sea bottom, but a floating and sinking platform 4 and accessories thereof are used for providing buoyancy to lift the whole machine set, the floating and sinking platform 4 sinks into the sea and hovers at a proper position, the proper position is positioned at a deeper depth below the sea surface, the buoyancy is used for balancing the gravity of the machine set, so the structural size of the buoyancy part is larger, if the floating platform 4 and the accessories thereof directly float on the sea level, the influence of ocean current can be obviously received, in the vicinity of the sea level, sea wind blows a surface water body (shallow sea current 91) to flow, the fluidity is influenced by wind power and has different speeds, the position capable of generating power is a position with strong wind, the fluidity of the surface water body is strong, and the floating and sinking platform 4 sinks into a deep water position, only one relatively thin trunk 1 penetrates through the surface water body, so that when the surface water body flows through the trunk 1, the impact force on the whole unit is small, the water flow speed at the deep water position is low, and the deep water undercurrent caused by the action of tide force on the whole ocean and the large-range temperature difference of the earth is not considered (the undercurrent generally also mostly occurs at a position far away from an continental shelf, but a wind turbine generator is not arranged too far away from the continental shelf), the sea wind cannot be influenced at a position with more water depth (deep sea current 92), the floating platform 4 is suspended at the position and is not easily impacted by the sea current, and the stable buoyancy is provided. The set supported by buoyancy can be conveniently shifted to a set position by a tugboat, and a proper working place is selected according to different seasons.

As shown in figure 1, a plurality of floating body assemblies 5 are arranged on the periphery of the floating platform 4 in the horizontal direction, and the floating body assemblies 5 have self-adaptive buoyancy which changes along with depth fluctuation.

If the floating platform 4 only has one buoyancy providing part, the danger that the unit topples due to ocean current impact can occur, so a plurality of floating body assemblies 5 are arranged by extending horizontally outwards, when the unit is wholly inclined towards one side, the floating body assemblies 5 with the sinking trend increase the self water discharge volume through the self or parts such as a connecting pipe and the like, and provide more buoyancy, so that the unit is enabled to recover the vertical state again.

As shown in fig. 2 to 5, the floating body assembly 5 includes an air bag 51, an air suction pump 52, an air inlet pipe 53, an air outlet pipe 54, a pressure regulating valve 55 and a float on-off block 56, the air bag 51 is fixed at the periphery of the floating platform 4, the air suction pump 52 is arranged in the air bag 51, the air suction pump 52 sucks air from above the sea level through the air inlet pipe 53 and injects the air into the air bag 51, the air outlet pipe 54 connects the inner space of the air bag 51 and the atmosphere space above the sea level, the air outlet pipe 54 is provided with the pressure regulating valve 55 with adjustable flow resistance, the air inlet pipe 53 and the air outlet pipe 54 are both provided with the float on-off block 56 at the sea level, and the air inlet pipe 53 has a surplus length 531 from the sea level to the air bag 51.

The air bag 51 is a drainage component, the more the drainage is, the larger the buoyancy is, the air suction pump 52 pumps the atmosphere to fill the air bag 51, so that the air bag keeps a certain volume, the air inlet and outlet pipes are respectively used as air paths to supply air and discharge air to the air bag, the pressure difference value of the outlet of the air bag 51 relative to the outlet of the air outlet pipe 54, which is allocated by the pressure regulating valve 55, is obtained in the air outlet pipe 54, the outlet is directly connected with the sea level atmosphere, the flow resistance of the pressure regulating valve 55 is the gauge pressure in the air bag 51, and the larger the pressure in the air bag 51 is, the larger the volume is at the same depth in the sea water, and the larger the buoyancy is provided. The float on/off block 56 can cut off the connection between the air outlet pipe 54 and the atmosphere on the sea surface after it is completely immersed in water, as shown in fig. 5, the air inlet pipe 53 has more surplus length 531, so, even if the air bag 51 connected below it sinks a little, the air inlet of the air pump 52 is not affected, the air outlet pipe 54 has no surplus length, and the length is exactly equal to the distance from the air bag 51 to the sea surface, so, once the connected air bag 51 sinks a little because of disturbance, the air discharge of the air bag 51 to the outside is cut off, the air pump 52 continues to operate, more air is stored in the air bag 51, the volume is slightly expanded, compared with other air bags 51, the buoyancy is larger to resist the disturbance, so that the unit returns to the main body 1 vertical state, after completely returning, the end of the air outlet pipe 54 led out from the air bag 51 is floated on the sea surface again, the air bag 51 is discharged smoothly through the pressure regulating valve 55, the air cells 51 return to the same size, expelling the excess gas compared to the other air cells, equally providing buoyancy to the flotation platform 4. The function of autonomously adjusting the offset posture is achieved. The pressure of the pressure regulating valve 55 corresponds to the internal pressure of the air bag 51, the pressure also corresponds to the depth of the floating platform 4, when the unit is initially set, the pipe lengths of the air inlet pipe 53 and the air outlet pipe 54 need to be adjusted, specifically, the pipe lengths can be made larger, and after the depth of the air bag 51 is determined, the surplus length of the air outlet pipe 54 is eliminated in a bundling mode.

The end of the air outlet pipe 54 close to the sea level is provided with an air pipe float 541 and an overflowing sphere 542, the overflowing sphere 542 is internally provided with an air hole 543 connected with a main air flow through hole of the air outlet pipe 54, the float on-off block 56 is in a lotus shape, the center of the upper surface of the float on-off block 56 faces to a cone groove 561, the tip of the cone groove 561 is arranged below and connected to the lower surface of the float on-off block 56 through a through hole, the upper end of the air outlet pipe 54 penetrates through the float on-off block 56, the air pipe float 541 is positioned below the float on-off block 56, the overflowing sphere 542 is positioned in the cone groove 561, the air hole 543 faces to the inclined surface of the cone groove 561, and when the air pipe float 541 abuts against the lower surface of the float on-off block 56, a gap remains between the air hole 543 and the inclined surface of the cone groove 561.

When the float on-off block 56 is located on the sea level, the end of the air outlet pipe 54 floats upwards by the buoyancy directly provided by the air pipe float 541, the overflowing sphere 542 is higher than the inclined plane of the cone opening groove 561, that is, the air hole 543 exhausting outwards in the overflowing sphere 542 can exhaust freely, at this time, the upper surface of the outer part of the air pipe float 541 is abutted against the lower surface of the float on-off block 56, when the air outlet pipe 54 is dragged by the lower air bag 51 and enters the water, the float on-off block 56 moves upwards by the buoyancy, at this time, the overflowing sphere 542 is in contact with the cone opening groove 561, the air hole 543 is closed by the inclined plane of the cone opening groove 561, for better closing, a spherical groove adapted to the spherical surface of the overflowing sphere 542 can be further arranged on the inclined plane of the cone opening groove 561, the upper surface of the outer part of the air pipe float 541 is separated from the lower surface of the float on-off block 56 by a distance, the air in the air bag 51 is almost reduced to the atmospheric pressure after passing through the pressure regulating valve 55, therefore, the pushing force of the air hole 543 on the floater on-off block 56 is small and cannot exceed the upward buoyancy force applied to the floater on-off block 56, so that the air hole 543 can be perfectly sealed by the cone groove 561, the pressure of the air bag 51 can keep the pressure of the external water body in the subsequent air injection process, and the injected air is used for increasing the volume.

The intake pipe 53 is provided with a check valve for allowing air to flow from the atmosphere to the airbag 51, the suction pump 52 and the pressure regulating valve 55 are controlled in an interlocking manner, and the pressure regulating valve 55 is closed when the suction pump 52 is stopped. This structure prevents that air bag 51 from exhausting fast and losing buoyancy and causing the unit to sink into aquatic after air pump 52 loses the electricity shut down, and when air pump 52 shut down, air-vent valve 55 closed and prevent that gasbag 51 is interior gas from discharging from outlet duct 54, and the check valve on the intake pipe 53 has also prevented that gas from exhausting from air pump 52, intake pipe 53 are reverse.

As shown in fig. 6 and 7, the offshore wind turbine further includes an opposite block 3, the opposite block 3 is sleeved on the main stem 1, the opposite block 3 floats on the sea level, and the opposite block 3 is impacted by water flow to enable the offshore wind turbine to rotate around a vertical axis in water. Subtend piece 3 includes floater 31, the connecting cylinder 32, rudder blade 33, spring 34 and key 35, key 35 is rectangular shape, key 35 passes through the vertical nail dress of screw on trunk 1, the floater 31 of taking the centre bore is installed to connecting cylinder 32 upper end, connecting cylinder 32 internal surface sets up vertical keyway 321, connecting cylinder 32 and floater 31 together overlap and establish on trunk 1, keyway 321 aligns with key 35, keyway 321 groove width is greater than key 35 key width, set up two between keyway 321 both sides wall and the key 35 both sides wall and make the spring 34 of symmetry line with key 35, connecting cylinder 32 outward appearance sets up rudder blade 33 along the horizontal direction.

The rudder blade 33 is impacted by water flow to give rotating moment to the trunk 1, the groove widths of the two springs 34, the key 35 and the key groove 321 are larger than the key width of the key 35, and the springs are arranged in the two springs, so that the trunk 1 is driven to rotate only when the rudder blade 33 rotates to enable the key groove 321 to continuously press the key 35 from one direction, and the water flow fluctuation is eliminated by the springs 34.

The floating block 31 makes the opposite block 3 float and stop at the sea level, where the water flow is most influenced by sea wind and has directivity, and when the rudder blade 33 has enough area, the impact and the moment of the water flow can completely make the whole unit rotate in situ to face the wind.

The end of the spring 34 adjacent the key 35 makes contact with the key 35 via the ball 36. The float block 31 may float up and down, so that the stem 1 has almost constant depth, the spring 34 and the key 35 have vertical sliding, and the friction is eliminated by the ball 36.

The floating platform 4 is also connected with an anchor cable 6. The anchor cable 6 locks the whole horizontal position of the unit to prevent the unit from drifting along with the water level. The anchor lines 6 are hooked to rock or the like on the seabed 93.

The air bag 51 is wrapped with a steel wire cover. The wire cover protects the air bag 51 and prevents large fish from reaching the outer surface of the air bag 51.

The main operation process of the device is as follows: the air bag 51 is firstly injected with more gas, the unit floats on the water surface and is towed to a designed position by a tugboat, then the air bag 51 discharges part of gas, the unit is wholly sunk, when the floating platform 4 sinks to a desired position, the pressure which is adaptive to the external water body in the air bag 51 is kept through the pressure regulating valve 55, the provided buoyancy force exactly balances the gravity of the unit, then the machine head 2 aims at sea wind to generate electricity, the electric energy can be stored, and the electric energy can also be remotely transmitted through a cable.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.