阅读说明：本技术 采用充气保压增强型塔筒的超大型水平轴风力发电机 (Ultra-large horizontal axis wind driven generator adopting inflatable pressure-maintaining enhanced tower barrel ) 是由 朱杰 于 2019-11-25 设计创作，主要内容包括：本发明公开了一种采用充气保压增强型塔筒的超大型水平轴风力发电机,塔筒为圆直筒形和锥台形两种,均采用分段外发兰连接,接缝处密封,顶部设有封头,塔内底部做气密封层,塔内腔构成气密闭腔,注入气体并保压,气密内腔中的压强P如下：<Image he="202" wi="644" file="DDA0002287612130000011.GIF" imgContent="drawing" imgFormat="GIF" orientation="portrait" inline="no"></Image>,圆直筒形塔筒下部与基础间还设有斜支撑件,由此,改善了受力条件,大幅提高了综合性能：刚度、压力空气阻尼减振、承载塔顶重力、抗失稳折断、倾覆、抗台风飓风及拓展海上风电,性费比大幅提高,塔筒可造的更高更大,显著提升发电量,特别适合制定标准化,系列化,模块化的国内和国际标准,可将塔筒的繁复设计改变为选型设计,十分高效简便。(The invention discloses an ultra-large horizontal axis wind driven generator adopting an inflatable pressure maintaining enhanced tower barrel, wherein the tower barrel is in a circular straight barrel shape and a frustum shape, and is connected by adopting segmented external flanges, the joint is sealed, the top of the tower is provided with a seal head, the bottom of the tower is provided with an air sealing layer, the inner cavity of the tower forms an airtight closed cavity, gas is injected and pressure is maintained, and the pressure P in the airtight inner cavity is as follows: and an inclined support piece is arranged between the lower part of the cylindrical tower barrel and the foundation, so that the stress condition is improved, and the comprehensive performance is greatly improved: rigidity, pressure air damping vibration reduction, tower top gravity bearing, instability, breakage, overturning, typhoon and hurricane resistance and offshore wind power expansion are greatly improved, and the tower barrelThe tower can be made higher and larger, the generated energy is obviously improved, the standard, the serialization and the modularized national and international standards are particularly suitable for making, the complicated design of the tower can be changed into the model selection design, and the tower is very efficient and simple.)

1. An ultra-large horizontal axis wind driven generator adopting an inflatable pressure-maintaining enhanced tower barrel comprises a ground foundation, an integral tower barrel, a machine head device, a pedestrian suspension cage device and an auxiliary device, wherein the bottom of the integral tower barrel is arranged on the ground foundation in a sitting mode, an inner flange and an outer flange are arranged at the lower end of a tower bottom section of the integral tower barrel and fixedly connected with the ground foundation through foundation bolts, reinforcing rib plates (53) are arranged between the flanges at two sides of each foundation bolt and a barrel wall, the machine head device comprises a cabin (21), a main shaft (20), a hub (19) and blades (18), the upper end of a tower top section of the integral tower barrel is matched with a supporting bearing (22), the supporting bearing (22) is connected with the cabin flange, the main shaft (20) is arranged on the cabin (21), the hub (19) is arranged on the main shaft (20), the blades (18) are arranged on, carry out flange joint between the adjacent segmentation tower section of thick bamboo, its characterized in that: the connecting flange of the segmented tower cylinder adopts an outer flange, and the integral tower cylinder is mainly formed by connecting and installing a tower bottom section, a tower body section, a tower top head sealing section and a tower top section from bottom to top; constitute inclosed pressurize container of aerifing through the flange by tower bottom segment, shaft section, top of the tower seal section, aerify pressurize container's bottom direct mount ground basis on to all adopt sealed structure to form segmentation tower section of thick bamboo outer flange joint seam sealing device (11) in flange joint department, make whole tower section of thick bamboo inner chamber local section become airtight inner chamber, make the injection of airtight inner chamber suitable gaseous medium, and carry out the pressurize, pressure P in the airtight inner chamber is as follows:

in the formula, G is the total weight of the machine head device, and S is the cross-sectional area of the airtight inner cavity; the tower top sealing head section adopts a double-connection special-shaped flange (13), and a flange connecting part is formed on the lower surface or the upper surface of the outer lateral boss of the sealing head part of the pressure container; the ground foundation inside the tower bottom section is provided with an air sealing layer; an overhaul platform is arranged below each section of tower tube sealing structure in the tower, a movable pedestrian ladder is arranged between adjacent platforms, an overhaul manhole (2) is arranged at the bottom of the tower, an air pipe (15) and an electric valve (16) are arranged on a head (14) of a tower top head sealing section, a door opening (25) is arranged on the tower top section, a door opening platform (26) is arranged outside the door opening (25), pedestrian suspension cage devices are arranged outside the tower from the tower bottom to the tower top, a safety valve (10), a pressure gauge (8), a combustible and explosive gas detector (9), an inflation pipe (5) and an inflation valve (4) are arranged on the tower body, and an exhaust pipe and an exhaust valve (3) are connected to an inflation pipeline (5) between the inflation valve (4) and the tower; a combined cable (28) is laid on a cable access opening (27) of the tower top section from the bottom of the tower to the tower top section along the tower body.

2. The ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining reinforced tower according to claim 1, wherein: the pressure P in the airtight inner cavity is 0.16-0.7 MPa; the gas filled in the airtight inner cavity formed at the partial section of the inner cavity of the whole tower cylinder is nitrogen or clean air, and when the air compressor is used for inflating, the air compressor is an oil-free lubrication air compressor.

3. The ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining reinforced tower according to claim 1, wherein: the integral tower barrel is of a round straight barrel-shaped structure and consists of a round straight barrel-shaped tower bottom section (35), a round straight barrel-shaped supporting seat section (33), a round straight barrel-shaped tower body section (30), a round straight barrel-shaped tower top sealing head section (12) and a round straight barrel-shaped tower top section (17), the round straight cylinder shaped supporting seat section (33) is arranged between the round straight cylinder shaped tower bottom section (35) and the round straight cylinder shaped tower body section (30), between straight cylindric tower section of thick bamboo lower part of circle and basis, the peripheral symmetry equipartition of outer wall around straight cylindric tower section of thick bamboo is equipped with 3 at least diagonal bracing pieces (6), the central line of diagonal bracing piece (6) becomes the contained angle that is not less than 30 degrees with a tower section of thick bamboo axial lead, the both ends of diagonal bracing piece (6) all are equipped with the flange, the flange joint of the outstanding supporting seat (7) on the one end of diagonal bracing piece (6) and the tower section of thick bamboo of straight cylindric supporting seat section (33), the other end and the bracing piece ground foundation (1) of diagonal bracing piece (6) are supported and are connected.

4. The ultra-large horizontal axis wind turbine employing the inflatable pressure-maintaining reinforced tower according to claim 3, wherein: the cylindrical tower body section (30) is formed by assembling at least 2 cylindrical segmented towers with the same structure, size and material, and the diameter of the inner cavity of each tower is 6-12 m.

5. The ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining reinforced tower according to claim 1, wherein: the integral tower barrel is of a frustum-shaped structure and consists of a frustum-shaped tower bottom section (49), a frustum-shaped tower body section (50), a frustum-shaped tower top sealing head section (51) and a frustum-shaped tower top section (52).

6. The ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining reinforced tower according to claim 1, wherein: two connecting outer flanges are adopted between the segmented tower cylinders to form an air-tight seal structure for connecting seams, the two connecting outer flanges are connected by bolts (44) and nuts (45), the inner rings of the two connecting outer flanges are symmetrical about the connecting seams, an annular dovetail groove with a dovetail-shaped cross section is processed, a dovetail-shaped elastic sealing ring (46) is embedded in the dovetail groove, and sealant is continuously poured along the joint between the two sides of the sealing ring and the dovetail groove to form two continuous and tight sealing rubber rings (43).

7. The ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining reinforced tower according to claim 1, wherein: the body of the end sealing section flange extends towards the inner ring and then extends and protrudes towards the opposite side flange to form a tubular convex pipe, the outer diameter of the convex pipe is smaller than the inner diameter of the opposite side flange, a gap of no more than 10mm is reserved on one side of the convex pipe and the inner diameter of the opposite side flange, the wall thickness of the convex pipe is equal to that of the end sealing, a connecting structure of two-connection special-shaped flanges (13) is formed, an end sealing (14) of a pressure container is integrally connected with the convex pipe on the two-connection special-shaped flange (13) in a butt welding mode, and meanwhile, the outer flange at the lower end of the.

8. The ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining reinforced tower according to claim 1, wherein: the pedestrian cage device comprises a winch (38), a hoisting steel wire rope (31), a head sheave (23), head sheave supports (24), a cage (36), guide rail sliding shoes (40), guide rails (34), guide rail supports (32) and a cage platform (37), wherein the top of a tower top section is welded with two symmetrically arranged head sheave supports (24), a head sheave bearing seat (41) is arranged on a horizontal beam of the two head sheave supports (24), the winch (38) is arranged on a ground foundation below the cage platform (37), the cage (36) is parked on the cage platform (37), the hoisting steel wire rope (31) is vertically led upwards from a winding drum of the winch (38) to bypass the head sheave (23) and then is led downwards to be connected with a hoisting point of the cage (36), the two sides of the cage (36) and the distance between the platform (37) and the head sheave (23) is not more than 1.5 meters along the height direction, the guide rail support (32) is welded on the outer wall of the tower barrel, a T-shaped guide rail (34) is fixedly installed on the guide rail support (32), a guide rail sliding shoe (40) is respectively arranged on each of the upper side and the lower side of the two sides of the cage body, a groove of the guide rail sliding shoe (40) is clamped into the T-shaped guide rail (34) during installation, a sliding fit mechanism is formed, a winch (38) is started to pull the cage (36) to move up and down, a door opening platform (26) is welded on the wall of the tower barrel, a worker can reach the cage platform (37) through an escalator (39), then ascends to the door opening platform (26) through the cage (36), and then enters a door opening (25), and then enters the cavity of the tower barrel of the tower top section and then enters.

9. The ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining reinforced tower according to claim 1, wherein: the method comprises the steps that a combined cable support (42) is welded on the outer wall of a tower barrel from the bottom of the tower to the top of the tower along the tower body upwards, a plurality of cables are laid along the combined cable support (42) side by side when the combined cable support (42) is arranged on the outer wall of the tower barrel upwards along the cables, the cables are fixedly installed on the combined cable support (42) through a cable clamp (29), are guided to the top of the tower section upwards, penetrate through a cable channel opening (27), enter the tower barrel of the top of the tower section and then enter a cabin (21) to be electrically connected with cabin electrical equipment.

10. The ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining reinforced tower according to claim 1, wherein: and (3) tying reinforcing steel bars on the ground foundation in the cylinder for secondary concrete pouring, wherein the thickness of the reinforcing steel bars is not less than 600 mm, covering all foundation bolts in the cylinder to form an airtight structure of a secondary poured concrete surface layer, and then coating pressure-resistant floor paint not less than 10mm on the secondary poured concrete surface layer.

Technical Field

The invention relates to a large horizontal axis wind driven generator, in particular to a modular tower drum enhanced ultra-large horizontal axis wind driven generator, which is applied to the technical field of wind driven generators.

Background

The wind driven generator is a clean renewable energy source which is greatly developed worldwide, the wind driven generator becomes a new energy source which is developed and utilized in a large scale in the 21 st century, the global wind energy resource is very rich, the wind power generation is rapidly developed under the support and encouragement of policies of various countries, and at present, China becomes a country with the largest wind power installed capacity in the world.

The wind speed at a high position is generally higher than that at a low position, and the wind energy is in direct proportion to the square of the wind speed, so that a higher tower can enable a unit wind sweeping area of a wind wheel to obtain more wind energy, and researches indicate that the annual generating capacity of the wind driven generator can be increased by 0.5-1% when the tower is increased by 1 meter under the common condition, and the annual generating capacity of the wind driven generator can be increased by 0.5-1 time when the tower is increased by 100 meters. The larger the wind sweeping area of the wind wheel is, the more the wind energy is obtained, and the wind sweeping area of the wind wheel is in direct proportion to the square of the length of the blades of the wind wheel, so that if the length of the blades is increased by 1 time, the wind sweeping area of the wind wheel is 4 times of the original wind energy, and the obtained wind energy is 4 times of the original wind energy. And if the tower barrel is lifted by 100 meters, the blades are lengthened by 1 time, and the comprehensive effect of the two is 6-8 times. The generated energy is 6 to 8 times of the original generated energy, the benefit is considerable, and the method is the most main effective path for greatly reducing the power consumption cost and improving the competitiveness of wind power.

For the reasons, the development trend of world wind power including terrestrial wind power and offshore wind power is that wind power equipment is ultra-large, a tower is higher and larger, blades are longer, and single machine capacity is larger, in recent years, the height of a steel tower of a wind driven generator is continuously increased, the length of the blade is 60 meters, 70 meters and 83 meters from 120 meters and 140 meters to the current maximum 166 meters, the single machine capacity is 4mw and 6mw to 8mw, the latest report is reported in 2019 in 10 months, the worldwide maximum Haliade _ x12mw offshore wind driven generator is offline and installed on site, the wind driven generator has the longest blade in the world of 107 meters, the world maximum single machine capacity is 12mw, the tower is 135 meters, the weight of a single cabin reaches 700 tons, and a permanent magnet direct drive motor is adopted.

Reports on the United states research institute are working on 500 m tall towers, 200 m long blades and ultra large megamachines with a single machine capacity of 50 mw. China mostly introduces foreign wind power technology, and can produce a tower drum 155 m high, blades 80 m long and a wind driven generator with single machine capacity of 8 mw.

At present, in the ultra-large development process of wind power equipment in the world, at least the following bottleneck problems are met and need to be solved:

the bottleneck problem that the manufacturing cost of the ultra-large tower barrel rises sharply is pointed out by related research, the manufacturing difficulty of the tower barrel is increased greatly when the height of the tower barrel is increased, the manufacturing cost of the tower barrel rises exponentially along with the increase of the height of the tower barrel, the benefit of the increase of the generated energy caused by the increase of the height of the tower barrel is increased quickly, and the manufacturing cost which rises sharply reaches a balance point, the tower barrel in the prior art is fully excavated and developed in recent years, and the height of the steel tower barrel is not broken through by 180 meters so far, so that the method can: the tower height of 180 meters is roughly a profit-loss balance point for the construction of towers of the prior art, i.e., the prior art, while fully capable of constructing towers that exceed 180 meters in height, is not economically cost-effective.

The wind power generator comprises a wind wheel, the ultra-large size of the top of the tower of the equipment in the engine room and the engine room can cause the gravity load of the head to be greatly increased, and also can cause the bottleneck problem of the severe increase of the manufacturing cost of the tower barrel.

Disclosure of Invention

In order to solve the problems in the prior art, the invention aims to overcome the defects in the prior art, and provides the ultra-large horizontal axis wind driven generator adopting the inflatable pressure-maintaining reinforced tower barrel, so that the integral stress condition of the tower barrel is improved, the comprehensive performance is greatly improved, particularly the integral mechanical property of the tower barrel is improved, the rigidity, the pressure air damping vibration reduction, the tower top gravity bearing capacity, the instability fracture resistance, the overturn resistance and the typhoon and hurricane resistance of the tower barrel are obviously improved, the offshore wind power application range is expanded, the cost performance of the ultra-large horizontal axis wind driven generator is greatly improved, the tower barrel can be higher and larger, and the generated energy is exponentially improved. The cylindrical tower drum is particularly suitable for establishing national and international standards of standardization, serialization and modularization, can change the complicated design of the tower drum into a model selection design, and is very efficient, simple and convenient.

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

an ultra-large horizontal axis wind turbine adopting an inflatable pressure-maintaining reinforced tower barrel comprises a ground foundation, an integral tower barrel, a machine head device, a pedestrian suspension cage device and an auxiliary device, wherein the bottom of the integral tower barrel is arranged on the ground foundation in a sitting mode, an inner flange and an outer flange are arranged at the lower end of a tower bottom section of the integral tower barrel and fixedly connected with the ground foundation through foundation bolts, reinforcing rib plates are arranged between the flanges at two sides of each foundation bolt and a barrel wall, the machine head device comprises a cabin, a main shaft, a hub and blades, the upper end of a tower top section of the integral tower barrel is matched with a supporting bearing, the supporting bearing is connected with the cabin flange, the main shaft is arranged on the cabin, the hub is arranged on the main shaft, the blades are arranged on the hub, the integral tower barrel; the connecting flange of the segmented tower cylinder adopts an outer flange, and the integral tower cylinder is mainly formed by connecting and installing a tower bottom section, a tower body section, a tower top head sealing section and a tower top section from bottom to top; the tower bottom section, the tower body section and the tower top head sealing section form a closed inflation pressure maintaining container through flanges, the bottom of the inflation pressure maintaining container is directly installed on the ground foundation, a sealing structure is adopted at a flange joint to form a sectional tower outer flange joint sealing device, so that the local section of the inner cavity of the whole tower barrel becomes an airtight inner cavity, a proper gas medium is injected into the airtight inner cavity, and pressure maintaining is carried out, wherein the pressure P in the airtight inner cavity is as follows:

in the formula, G is the total weight of the machine head device, and S is the cross-sectional area of the airtight inner cavity;

the tower top sealing head section adopts a two-connection special-shaped flange, and a flange connecting part is formed on the lower surface or the upper surface of an outer lateral boss of the sealing head part of the pressure container; the ground foundation inside the tower bottom section is provided with an air sealing layer; an overhaul platform is arranged below each section of tower tube sealing structure in the tower, a movable pedestrian ladder is arranged between adjacent platforms, an overhaul manhole is arranged at the bottom of the tower tube, a vent pipe and an electric valve are arranged on a sealing head of a tower top sealing head section, a door opening is arranged on the tower top section, a door opening platform is arranged outside the door opening, a pedestrian suspension cage device is arranged outside the tower from the bottom of the tower to the top of the tower, a safety valve, a pressure gauge and a flammable and explosive gas detector, an inflation pipe and an inflation valve are arranged on the tower body, and an exhaust pipe and an exhaust valve are connected to an inflation pipeline between the inflation valve and the tower tube; the combined cable is laid at the cable channel opening of the tower top section.

As the preferred technical scheme of the invention, the tower body section is assembled by at least 2 segmented towers respectively, and the diameter of the inner cavity of each tower is 6-12 meters.

As the preferable technical scheme of the invention, the pressure P in the airtight inner cavity is 0.16-0.7 MPa; the gas filled in the airtight inner cavity formed at the partial section of the inner cavity of the whole tower cylinder is nitrogen or clean air, and when the air compressor is used for inflating, the air compressor is an oil-free lubrication air compressor.

As a preferred technical scheme of the invention, the integral tower barrel is of a circular-straight barrel-shaped structure and comprises a circular-straight barrel-shaped tower bottom section, a circular-straight barrel-shaped supporting seat section, a circular-straight barrel-shaped tower body section, a circular-straight barrel-shaped tower top sealing section and a circular-straight barrel-shaped tower top section, wherein the circular-straight barrel-shaped supporting seat section is arranged between the circular-straight barrel-shaped tower bottom section and the circular-straight barrel-shaped tower body section, at least 3 inclined supporting pieces are symmetrically and uniformly distributed around the periphery of the outer wall of the circular-straight barrel-shaped tower barrel between the lower part of the circular-straight barrel-shaped tower barrel and a foundation, the central lines of the inclined supporting pieces and the axial line of the tower barrel form an included angle of not less than 30 degrees, flanges are arranged at two ends of the inclined supporting pieces, one end of each inclined supporting piece is. Preferably, the cylindrical tower body section (30) is formed by assembling at least 2 cylindrical segmented towers with the same structure, size and material, and the diameter of the inner cavity of each tower is 6-12 m.

As a preferred technical scheme of the invention, the integral tower barrel is of a frustum-shaped structure and consists of a frustum-shaped tower bottom section, a frustum-shaped tower body section, a frustum-shaped tower top sealing head section and a frustum-shaped tower top section.

As a preferred technical scheme of the invention, two connecting outer flanges are adopted between the segmented tower cylinders as connecting seams to set an air-tight structure, the two connecting outer flanges are connected by bolts and nuts, the inner rings of the two connecting outer flanges take the connecting seams as symmetrical centers, an annular dovetail groove with a dovetail-shaped cross section is processed, a dovetail-shaped elastic sealing ring is embedded in the dovetail groove, and sealant is continuously poured along the two sides of the sealing ring and the joints of the dovetail groove to form two continuous and tight sealing rubber rings.

As a preferred technical scheme of the invention, after a body of the head sealing section flange extends towards an inner ring, the body extends towards the opposite side flange to form a tubular convex pipe, the outer diameter of the convex pipe is smaller than the inner diameter of the opposite side flange, a gap of no more than 10mm is left between the outer diameter of the convex pipe and the inner diameter of the opposite side flange on one side, the wall thickness of the convex pipe is equivalent to that of the end socket, a connecting structure of the two-connection special-shaped flange is formed, the end socket of the pressure container is integrally connected with the convex pipe on the two-connection special-shaped flange in a butt welding mode, and meanwhile.

As a preferred technical scheme of the invention, the pedestrian cage device comprises a winch, a hoisting steel wire rope, a head sheave bracket, a cage, guide rail sliding shoes, a guide rail bracket and a cage platform, wherein the top of the tower top section is welded with two symmetrically arranged head sheave brackets, a head sheave bearing seat is arranged on a horizontal beam of the two head sheave brackets, the winch is arranged on a ground foundation below the cage platform, the cage is parked on the cage platform, the hoisting steel wire rope is vertically led up and around the head sheave from a winding drum of the winch and then is led down and connected with a hoisting point of the cage, the guide rail brackets are welded on the outer wall of a tower cylinder at the two sides of the cage and between the platform and the head sheave at the interval distance of 1.5 meters along the height direction, the guide rail brackets are arranged on the outer wall of the tower cylinder, the guide rail brackets are arranged and fixed on the guide rail brackets, the upper side and the lower side of the two sides of a cage body are respectively provided with one guide rail, a sliding fit mechanism is formed, the winch is started to pull the cage to move up and down, the door opening platform is welded on the cylinder wall, and workers can reach the cage platform through the escalator, rise to the door opening platform by taking the cage, enter the door opening, enter the tower barrel cavity of the tower top section and then enter the engine room.

As a preferred technical scheme of the invention, a combined cable support is welded on the outer wall of the tower from the bottom of the tower to the top section of the tower along the tower body, and a distance of 1.5 meters is reserved along the cable, when laying, a plurality of cables are laid along the combined cable support side by side, and are fixedly arranged on the combined cable support by a cable clamp, are led to the top section of the tower, penetrate through a cable passage port, enter the tower of the top section of the tower, and then enter a cabin to be electrically connected with electric equipment of the cabin.

As a preferred technical scheme of the invention, the reinforcement is additionally tied on the ground in the cylinder for secondary concrete pouring, the thickness is not less than 600 mm, the foundation bolts in the cylinder are completely covered to form an airtight structure of a secondary poured concrete surface layer, and then pressure-resistant floor paint not less than 10mm is coated on the secondary poured concrete surface layer.

Compared with the prior art, the invention has the following obvious and prominent substantive characteristics and remarkable advantages:

1. the inflatable pressure-maintaining tower barrel of the ultra-large horizontal shaft wind driven generator greatly improves the capability of the tower barrel for bearing the gravity load of the tower top machine head, and by 10 months in 2019, the maximum single machine capacity of the wind driven generator in the world is 12mw, the total weight of the machine head is about 900 tons, and with the continuous rising of the single machine capacity, machine types of 15mw, 20mw and larger can appear in the near future, and the gravity load of the tower top machine head can also rise to 2000 tons or even higher than 1000 tons;

2. the inflatable pressure-maintaining tower cylinder greatly improves the rigidity of the tower cylinder, the internal pressure gas of the tower cylinder can greatly improve the rigidity of the tower body, and the anti-breaking capacity of the tower cylinder is greatly improved;

3. the gas under pressure in the cylinder can play a role in damping vibration attenuation on the vibration of the tower body, can quickly attenuate the vibration amplitude of the tower body, and improves the fatigue strength resistance of the tower cylinder;

4. the invention greatly improves the capability of the tower barrel in resisting unstable fracture and reversion, the tower barrel fracture and reversion and the connection root reversion are two main accidents of the tower barrel, wind resistance generates toppling bending moment on the tower body on one hand, on the other hand, the tower top head can deflect and deviate from the axial center of the tower barrel under the action of the wind resistance, the distance of the deviation center is multiplied by the gravity load of the head to generate toppling bending moment on the tower body, the two bending moments are superposed simultaneously in the same direction, and the bearing capability of the tower body strength is exceeded under the attack of super typhoon hurricane, the tower body can be suddenly unstable and fractured or the connection root reversion, the invention is an inflatable pressure-maintaining tower barrel, the rigidity of the tower body is greatly improved under the action of gas pressure, the distance of the tower top head deviating from the center under the action of the wind resistance is greatly reduced, and most or all of the gravity load of the tower top head is transmitted to the inner ground foundation of the barrel through the gas with the internal pressure, so that the eccentric distance of the head, therefore, the superposition effect of the two bending moments is greatly reduced, and the tower barrel can greatly improve the capability of resisting instability, fracture and overturn under the attack of typhoons and hurricanes;

5. at least 3 inclined supporting pieces symmetrically and uniformly distributed along the periphery of the cylinder wall are additionally arranged between the outer wall of the lower part of the cylindrical tower barrel and a ground foundation, so that the continuous root tilting resistance of the cylindrical tower barrel is greatly improved when the cylindrical tower barrel is attacked by ultra-strong typhoon and hurricane;

6. the invention can greatly improve the survival wind speed of the tower cylinder, the rigidity of the tower body is improved, the instability breaking resistance is improved, and the root connection tilting resistance is improved, so that the survival wind speed of the tower cylinder can be improved to more than 90 meters per second from the existing designed survival wind speed of 70 meters per second;

7. the device has obvious cost performance advantage, greatly improves the ratio of the comprehensive performance improvement to the increased cost of the large-scale wind driven generator, breaks through the rule that the manufacturing cost of the tower barrel increases in exponential proportion along with the increase of the height of the tower barrel to a certain extent, can effectively break through the high limit of 180 meters of the profit and loss balance point of the tower barrel in the prior art, and is expected to improve the high limit to 300 meters; the increase of the height of the tower barrel can improve the annual energy production of the wind driven generator by 0.5-1 time, and the tower barrel height limit of the invention is 120 meters more than that of the existing tower barrel, so that the annual energy production can be improved by 0.5-1 percent when the tower barrel is increased by 1 meter, thereby realizing higher economic benefit;

8. the tower cylinder can prolong the service life, on one hand, the anti-fatigue capacity of the tower cylinder can be improved by the damping and vibration damping effect of the inflatable pressure-maintaining tower cylinder, and the service life is prolonged, on the other hand, due to the change of the stress condition, the structural requirement that the thickness of the original tower cylinder is thin at the top and thick at the bottom is balanced at present, and the thickness can be required to be consistent, so that the weak link caused by the influence of corrosion on the thin wall can be eliminated, and the service life of the tower cylinder is prolonged;

9. the invention is particularly suitable for offshore floating wind driven generators, when the offshore floating wind driven generator is attacked by super strong wind waves, the tower barrel swings, particularly, the eccentric distance of the swinging of the machine head deviating from a vertical line is far larger than that of a fixed tower barrel, at the moment, the tower barrel is influenced by wind resistance bending moment and the bending moment generated by multiplying the gravity load of the machine head at the top of the tower by the eccentric distance, the influence peak value of double superposition is very large, and the requirements on the rigidity and the instability resistance of the tower barrel are higher; the inflatable pressure-maintaining tower cylinder just meets the comprehensive requirement, so the inflatable pressure-maintaining tower cylinder is particularly suitable for being used as a tower cylinder of an offshore floating type wind driven generator;

10. in the prior art, the frustum-shaped tower barrel is manufactured in sections and transported in sections, and a road can reach an installation region;

11. the ultra-large wind driven generator is suitable for offshore wind power development, the diameter of the tower barrel of the ultra-large wind driven generator is large, can be from 8 meters to more than ten meters, is limited by the passing conditions of a transportation road, is greatly limited by regions when being installed on land, is not limited by transportation conditions when being installed on the sea, and can be developed vigorously;

12. the circular straight cylindrical tower drum is particularly suitable for standardized, modularized and serialized production and manufacturing, the technical parameters of the frustum-shaped tower drum of the wind driven generator in the prior art are eight-door, even if the tower drum of the wind driven generator with the same installed capacity level has large difference in height of a tower body, diameter of the tower drum and thickness of the drum wall, and manufacturers have respective design standards; according to the circular-straight-barrel-shaped tower barrel, the tower body has the same diameter from top to bottom, if the strength design concept of the prior art is adopted, the barrel wall of the tower bottom is thick, the barrel wall of the tower top is thin, and the wall thickness of the tower body is in a transition state from thick to thin from bottom to top, the circular-straight-barrel-shaped tower barrel is an inflatable pressure-maintaining tower barrel, on one hand, the acting force of gas pressure on the barrel wall is the same, the thickness of the barrel wall is required to be consistent, on the other hand, most or all of the gravity load of a head of the tower top is transmitted to the ground foundation in the; by combining the stress effects of the two aspects, the wall thickness of the circular straight cylindrical tower barrel can be the same from top to bottom, so that after the segmented tower barrel is manufactured in a segmented mode, the functions of the segmented tower barrel can be divided into 5 types, and the steps from the tower bottom to the tower top are as follows: the invention can amplify the diameter of a round and straight cylindrical tower barrel into a series of standards according to a certain interval in turn, for example, according to the diameter of the tower barrel: the tower barrels in the same diameter standard are not only modularized, but also universal and standardized, and the sizes, the structures and the materials of the similar segmented tower barrels of other 4 types of segmented tower barrels are the same, so that a unified tower barrel manufacturing standard can be formed;

13. the modular, standardized and serialized structure of the round and straight cylindrical tower barrel changes the complicated design work of the wind driven generator tower barrel in different regions and different wind conditions into simple and convenient work of model selection and module adjustment according to series standards, and brings great convenience to the design of the tower barrel; the diameter of the tower barrel is selected from diameter series standards according to installed capacity and the gravity load of the machine head, the height of the tower barrel is selected according to the wind condition of an installation place and the maximum wind speed in 50 years, and the model selection design requirement is easily met through module adjustment, so that the method is efficient and convenient;

14. the standardized, serialized and modularized characteristics of the cylindrical tower drum are particularly suitable for specialized, large-scale, standardized and serialized production and manufacturing of organizations, and the manufacturing cost is further reduced.

Drawings

Fig. 1 is a schematic structural diagram of an ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining enhanced circular-straight cylindrical tower according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of the upper portion of the tower top section according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view of a dovetail seal at the joint of the outer flanges of the segmented tower according to the first embodiment of the invention.

Fig. 4 is a cross-sectional view of a connection of two-connection special-shaped flange seal heads according to a first embodiment of the invention.

Fig. 5 is a cross-sectional view of a tower section according to a first embodiment of the present invention.

Fig. 6 is a schematic structural view of an ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining enhanced frustum-shaped tower according to a fourth embodiment of the present invention.

Detailed Description

The above-described scheme is further illustrated below with reference to specific embodiments, which are detailed below: