CN202391647U - Wind-power generator - Google Patents

Abstract

The utility model discloses "a wind power generator" used for wind power generation, which includes a tower frame, an assembly part of a nacelle and a wind wheel. There is an anti-falling device. Under the protection of the anti-falling device, use a hydraulic cylinder to lift the installed part to a certain height and then install the adjacent tower components below it; the disassembly is in the opposite order to the above. The tower of the wind power generator is light in weight, easy to transport, and can be quickly installed and disassembled by hydraulic lifting method. The problem of excessive life expectancy is conducive to improving the localization rate and reducing costs.

Description

a wind generator

technical field

The utility model relates to a horizontal axis wind power generator which uses wind power to generate electricity. According to the output mode, wind power generators can be divided into grid-connected generators whose power can be integrated into the grid and decentralized wind power generators whose power can be used locally. The utility model relates to a wind power generator belonging to the above two wind power generators. According to the structure, wind power generators can be divided into two types: horizontal axis wind power generators and vertical axis wind power generators. The utility model belongs to the horizontal axis wind power generators. the

Background technique

The horizontal axis wind turbine includes the assembly components of the nacelle composed of the transmission device, the power generation device, the yaw system, the main frame, and other auxiliary devices, and the tower supporting the nacelle up to tens of meters or even hundreds of meters. And the wind wheel composed of the hub, there is a kind of wind wheel that is also equipped with a pitch change device. the

The tower of the horizontal axis wind turbine not only bears the wind pressure, but also bears all the dynamic and static loads during the operation of the wind turbine. Tower structures include steel cylinders, concrete, and trusses. At present, large wind turbines mostly use steel cylinder towers. The diameter of the steel cylinder can reach seven, eight or even tens of meters, making transportation very difficult. For the convenience of transportation, the steel tube tower generally needs to be segmented and manufactured in pieces, and then assembled on site, which solves the problem of transportability, but reduces the strength and rigidity of the steel tube, thus increasing the weight and cost , In addition, the workload of on-site installation is too large. Due to the above-mentioned problems, concrete towers have to be increasingly used in large-scale wind turbines. This tower frame undoubtedly increases the amount of work and transportation, and it is not dismountable, so the equipment maintenance on the top of the tower frame is also inconvenient. In the past, all kinds of wind turbines were installed from the bottom of the tower, and then lifted and installed part by part with a very high crane. Almost all the installation work belongs to high-altitude operations, and parallel operations are prohibited during high-altitude operations. , so the installation period is very long, increasing the cost. Especially in the end, it is very difficult to hoist hundreds of tons of various equipment to a height of 100 meters with a giant crane. The cost of road repair is also very high to drive the giant crane into the wind power site. And once it is installed, it is difficult to disassemble it, so it cannot be overhauled regularly, so that various equipment on the tower are required to have high reliability and long life. This requirement is extremely unfavorable for cost reduction, improvement of localization rate and mass production. the

Utility model content

The purpose of this utility model is to provide a low-cost wind power generator that can reduce power generation cost, reduce installation workload, shorten installation period, and especially can be disassembled quickly, so as to facilitate maintenance and achieve regular overhaul. In order to solve the above problems, a wind generator of the utility model includes a tower frame, a nacelle assembly part and a wind wheel, and is characterized in that the tower frame is disassembled into a structure installed from above, and an anti-falling device is installed on the tower frame. the

A horizontal axis wind power generator as described above is characterized in that the tower is assembled by connecting steel tower short sections end to end. the

A horizontal axis wind power generator as described above is characterized in that the tower is a truss assembled from rods made of section steel. the

A horizontal-axis wind power generator as described above is characterized in that the anti-falling device is a cable composed of an oil cylinder and a flexible member whose length can be changed in series. the

A kind of horizontal axis wind power generator as mentioned above is characterized in that the anti-falling device is a wire rope pulled by a winch. the

A horizontal axis wind power generator as described above is characterized in that the anti-falling device is an assembly composed of a cable and an oil cylinder that are used in series with the original tower when installing the tower with the cable. the

A horizontal axis wind power generator as described above is characterized in that the tower is provided with a load-bearing member connected to the hydraulic cylinder when the tower is lifted. the

A horizontal axis wind power generator as described above is characterized in that the tower is provided with a structure connected to the auxiliary lifting plate, so that the tower can be raised and lowered with the lifting plate, and the lifting plate is driven by a hydraulic cylinder. the

A horizontal axis wind power generator as described above is characterized in that the blades of the wind rotor are inclined to the outside, so that the angle between the blades and the horizontal axis is less than 80°, and the distance between the cable and the tower The connection point is located on the upper part of the tower. the

A horizontal-axis wind power generator as described above is characterized in that the horizontal-axis wind power generator further includes a guiding device, the guiding device is a guide rail slider mechanism formed between the foundation and the lower part of the tower or Horizontally tensioned stay cables between the foundation and the lower part of the tower. the

After adopting such a structure, beneficial effects can be obtained from the following five aspects. the

1. The tower can be quickly installed and disassembled with a hydraulic cylinder, which makes it possible to overhaul the equipment on the top of the tower regularly, so that the requirements for the manufacturing quality and materials of each component can be relaxed, which is beneficial to reduce the cost, improve the localization rate and Significant mass production

2. The cable can be used to solve the problem of instability of the pressure bar, so the weight of the tower can be reduced;

3. Make each short section of the tower into a smaller section, the same size and shape, so that the manufacturing cost, transportation cost and installation cost can be reduced;

4. Since there is no need for a huge crane with a height of 100 meters, it can save rent and road construction costs. the

5. Since the assembly and disassembly operations can be completed on the ground, it is safer than the previous high-altitude operations during fan installation and disassembly. the

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described. the

Fig. 1 is a front view of a first embodiment of a wind power generator of the present utility model. the

Fig. 2 is the enlarged view of I place in Fig. 1 of the first embodiment of a kind of wind power generator of the present utility model

Fig. 3 is a front view of a second embodiment of a wind generator of the present invention. the

Fig. 4 is an enlarged view of II in Fig. 3 of the second embodiment of a wind power generator of the present invention. the

Fig. 5 is a front view of a third embodiment of a wind power generator of the present invention. the

Fig. 6 is a front view of the installed wind power generator according to the first embodiment of the wind power generator of the present invention. the

Detailed ways

Referring to Fig. 1 and Fig. 2, the first embodiment of a wind power generator of the present utility model includes a wind wheel 1 formed by installing each wind blade 12 on a hub 13, and some models of the wind wheel 1 are also equipped with variable pitch device. In the first embodiment, the blades 12 are inclined to the outside, and the blades 12 form an angle of 72° with the center line 15 of the horizontal axis; the tower 3 of the truss structure is disassembled into a tower subsection 7 that can be installed from the top first, and the tower The frame puppet 7 is connected to the adjacent tower puppet through the puppet end face 8; the engine room assembly part 2 including the power generation system and various auxiliary systems; Between the cable connector 16 and the foundation 14, in Fig. 1, the upper drag cable 4 is connected with the oil cylinder 18 to form the anti-fall device 25, which is the working state in the installation process; the lower drag cable 5 provided as required, the lower floor The stay cables 5 can be arranged in multiple layers, and may not be provided in wind turbines with small extreme wind loads. The connection point 17 between the stay cables 5 on the lower layer and the tower 3 can be arranged in the middle of the tower according to the needs of anti-stabilization nearby. A load-bearing member 9 is also arranged on the tower sub-joint 7 according to the requirements of the hydraulic lifting and dismounting equipment 23 . One or more load-bearing parts 9 can be set on each section of the tower, and the number and structural form of the load-bearing parts 9 are determined by the stroke and thrust of the hydraulic cylinder and the method of replacing the short joint. The hydraulic lifting and dismounting equipment 23 can use several independent hydraulic cylinders 23, and each hydraulic cylinder can also be assembled into an integral device. The guide device 22 is located at the bottom of the tower so that a guide rail slider mechanism is formed between the tower and the foundation 14, and the effect is to prevent the bottom of the tower from deviating from the station during installation. In such a wind generator, since the blades are inclined outward, even if the upper cable 4 is fixed on the upper part of the tower 3, it will not touch the blades 12, so the lateral force on the top of the tower is mainly caused by the upper layer The stay cable 4 bears the burden, which is obviously more beneficial to reduce the weight of the tower than installing the stay cable in the middle of the tower in order to avoid the blades from colliding with the stay cables in the prior art. Simultaneously because the upper floor stay cable 4 is fixed on the tower top, it is also convenient to borrow the upper floor stay cable 4 as an anti-falling device when starting to install the top section of the tower. When as anti-falling device, upper strata dragline 4 is connected with an end of oil cylinder 18, and oil cylinder 18 can tighten and loosen dragline 4 anti-falling at any time, will pull down oil cylinder 18 after installation certainly. Wherein, in this embodiment, both the upper stay cable 4 and the lower stay cable 5 can use steel wire ropes and steel hinge wires as flexible parts, adjust the length by rope clips and be connected with the oil cylinder 18, or use chains or end-to-end joints. Connecting rods of different lengths are used as flexible parts. The lower stay cable 5 can solve the problem of the stability of the compression bar of the tower, so the cross-sectional size of the tower can be reduced. There are generally 3 or more than 3 stays and anti-falling devices used in the installation process as a part of the tower. Currently the most widely used steel tube tower is the one with the largest bending moment at the root. The utility model has solved this problem, and even if a spherical hinge is used between the tower and the foundation, the tower will not topple, so not only can the weight of the tower be reduced, but also the safety factor can be guaranteed. Since the tower adopts the structure of butt joint of the same short section, the production scale can be increased and the cost can be reduced. Due to the protection of the cable, it can be installed quickly and at low cost by hydraulic lifting and disassembling. This method is to erect the uppermost section of the tower on the work station under the protection of the anti-fall device, and then hoist the various equipment in the wind wheel and the assembly parts of the nacelle to the top of this section of the tower, and then use the The hydraulic cylinder jacks up the height of a short section of the tower, and then installs a section of the tower from the bottom, and the installation is completed in sequence like this. When the stroke of the hydraulic cylinder is not enough for the height of a short joint of the tower, it can be lifted in multiple times. You can also use the same method to dismantle them one by one, and then reinstall them after overhauling. This can not only save the huge cost of hiring a large crane to hoist hundreds of tons of equipment to a height of 100 meters, but also solve the problem that the current wind power equipment cannot be dismantled and overhauled once installed, so the life of each major equipment has to be determined. It is a 20-year-old problem. Now China's equipment manufacturing capacity is already considerable, but it will take many years of hard work for many companies to greatly improve product life. Because of this, many key equipment of wind turbines are still imported in large quantities. If the utility model allows the overhaul period of the equipment to be shortened to 5 years, then the existing enterprises can break through the bottleneck with existing materials and techniques, and produce on a large scale with a high localization rate. In this way, the high cost of wind power can be compensated by the low cost of Chinese manufacturing. In this way, a part of coal power can be replaced with wind power, a green energy source, to reduce carbon emissions. So the beneficial effect of a kind of wind power generator of the present utility model is quite huge. the

In conjunction with Fig. 3 and Fig. 4, the structure adopted in the second embodiment of a kind of wind power generator of the present invention is similar to the first embodiment, the difference is only that the tower of the truss structure in the tower 3 The sub-section 7 has been replaced with a tower sub-section 10 of a steel cylinder structure, and of course a large-diameter tower sub-section 10 can be selected at the lower part of the tower as required. The blade 12 is tilted outwards to become perpendicular to the horizontal axis. In addition, the oil cylinder 18 in the protection device is replaced by a wire rope pulled by a winch. Although the structure and shape of the load-bearing member 9 and the end face 11 of the short joint are the same as those of the first implementation The way is a bit different, but the order of operations and functions are the same, and the beneficial effects are also the same. the

The third implementation mode: in order to be able to resist the impact of vehicles and mudslides and cooperate with hydraulic lifting and disassembling equipment, the lower part of the tower can be made into a concrete structure, and the upper part can be made into a steel sub-section structure. In principle, it is the same as the first two implementations. the

The fourth embodiment: with reference to Fig. 5, the fourth embodiment of the present utility model is that the tower is disassembled into rods that can be installed from the top. The installation sequence is as follows: first, the rods 31, 41 are installed together on the station to form a section of the tower on the top and the nacelle 2 and the wind wheel are installed on this section of the tower, the anti-falling device 25 is installed, and the hydraulic cylinder 23 is hinged on the load-bearing member 91, and the rope-like guide device 24 is installed on the lower end of the rod member 31, and is stretched horizontally in all directions. The function of the guide device 24 is the same as that of the guide device 22 in the first embodiment. That is, when the hydraulic cylinder 23 installed on the load-bearing member 91 jacks up the tower, the guide device 24 is loosened and tensioned to prevent the lower end of the rod 31 from leaving the station. When the tower rises enough to the height of the bar 32, fix the upper part of the tower, install the bar 32 and the bar 42, then move the guide 24 to the lower end of the bar 32 and move the hydraulic cylinder 23 to the bearing member 92, and so on, until the installation is complete. If the height of the crane for hoisting the cabin 2 allows, the rods 31, 32, and even 33 can also be installed earlier and then jacked up with the hydraulic cylinder 23. When hydraulic cylinder 23 rises to sufficient height, available another group of hydraulic cylinder 23 replaces, also can move down hydraulic cylinder 23 after positioning with other mechanical devices. The disassembly sequence is reversed. the

The fifth embodiment is that no force-bearing member is provided on the tower, but a structure connected with the auxiliary lifting plate is provided. The tower is raised and lowered by the lifting disc driven by the hydraulic cylinder, so that a space for installing tower components is formed at the lower part of the tower. In this embodiment the guide device can also be provided on the lifting disc. the

Fig. 6 shows the front view of the wind power generator in the power generation state after the first embodiment is installed. the

In the above-mentioned various embodiments, load-bearing parts can be set on the tower, and can also be used in conjunction with the lifting plate; the load-bearing parts can also be transformed into different forms; each anti-falling device and each guide All can be used in various embodiments; also hydraulic cylinder, guiding device, the device that replaces tower puppet, etc. can be transformed into a whole machine by independent parts, as these simple transformations also all fall within the scope of the present utility model. under protection. the

Claims (10)

1. A horizontal axis wind turbine for wind power generation, including a tower, a nacelle assembly and a wind wheel, characterized in that the tower is split into a structure that is installed from the top first, and an anti-falling device is installed on the tower device. 2. A horizontal axis wind power generator according to claim 1, characterized in that the tower is assembled by joining steel tower short sections end to end. 3. A horizontal axis wind power generator according to claim 1, characterized in that the tower is a truss assembled from rods made of section steel. 4. A horizontal axis wind power generator according to claim 1, characterized in that the anti-falling device is a cable formed in series with an oil cylinder and a flexible piece whose length can be changed. 5. A horizontal axis wind power generator according to claim 1, characterized in that the anti-falling device is a wire rope pulled by a winch. 6. A horizontal axis wind power generator as claimed in claim 1, characterized in that the anti-falling device is formed by connecting a cable and an oil cylinder that are matched with the original tower when the tower with a cable is installed. components. 7. A horizontal axis wind power generator according to claim 1, characterized in that the tower is provided with a load-bearing member connected with a hydraulic cylinder when lifting the tower. 8. A horizontal axis wind power generator as claimed in claim 1, characterized in that the tower is provided with a structure connected with the auxiliary lifting plate, so that the tower can be lifted and lowered with the lifting plate, and the lifting plate is controlled by hydraulic pressure. Cylinder drive. 9. A horizontal axis wind power generator as claimed in claim 1, characterized in that the blades of the wind rotor are inclined to the outside, so that the angle between the blades and the horizontal axis is less than 80°, and the drag cables and The connection points between the towers are located on the upper part of the towers. 10. A kind of horizontal axis wind power generator as claimed in claim 1, it is characterized in that said horizontal axis wind power generator also comprises guide device, and this guide device is the guide rail slide formed between foundation and the lower part of the tower. The block mechanism or the cables are tensioned horizontally between the foundation and the lower part of the tower. the

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