CN211340834U - But novel fan basis of self-adaptation stable control - Google Patents
But novel fan basis of self-adaptation stable control Download PDFInfo
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- CN211340834U CN211340834U CN201921074346.0U CN201921074346U CN211340834U CN 211340834 U CN211340834 U CN 211340834U CN 201921074346 U CN201921074346 U CN 201921074346U CN 211340834 U CN211340834 U CN 211340834U
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Abstract
The utility model discloses a but novel fan basis of self-adaptation stable control. The foundation comprises a forward conical foundation, an inverted conical foundation, an EPS geotechnical foam block and an active adjusting system; the forward conical foundation is positioned at the upper part of the reverse conical foundation; the rubber layer is arranged outside the inverted cone foundation, the bottom of the inverted cone foundation is provided with a forward conical groove, and the EPS geotechnical foam block is arranged in the groove; the active adjusting system is arranged in the whole foundation. Compared with the traditional gravity type foundation, the utility model retains the capability of bearing and dispersing the load transferred by the upper fan tower drum and the engine room, and the inverted cone type foundation and EPS material filling at the lower part increase the contact between the foundation and the soil, further exert the bearing capacity of the soil body, and the rubber layer can improve the rotation of the fan; the active adjusting system balances the overturning moment of the tower drum of the upper fan and the cabin on the top surface of the foundation by controlling the distribution of water; the basic concrete has less consumption and good economical efficiency; stable structure, high reliability and wide application prospect.
Description
Technical Field
The utility model belongs to novel basic design of land fan, installation engineering and fan control system's field relates to a but novel fan basis of self-adaptation stability control.
Background
The world energy consumption and the greenhouse effect are more and more important nowadays, so the energy industry is developing towards the direction of cleaning and recycling, wind power generation is produced accordingly, and by 2050, 12% of the global electric energy is expected to come from wind power generation, and the power generation capacity of the currently global built wind power plant is 470GW, while that of 436.7GWThe electric quantity comes from an onshore wind power plant and accounts for 97 percent of the total electric energy production, so that onshore wind power plays a dominant role in wind power generation. Chinese continental land is a living thing, has rich land wind energy resources, and has the average wind energy density of 100W/m2Especially in inland of our country, for example: the northeast, northwest and northwest regions have abundant wind energy resources. By the end of 2016, China has become the world's largest land-based wind power generation country, the total land power generation capacity reaches 168.73GW, which accounts for 36% of the world land-based wind power generation output, the built land-based wind power plant in China has the power generation capacity of 90GW, the accumulated land-based wind power generation is expected to reach 200GW in 2020, 400GW in 2030 and 1000GW in 2050.
The existing onshore fan foundation forms comprise a gravity expansion foundation, a beam-slab foundation, a rock anchor rod foundation and a PH foundation. The traditional gravity extension foundation has the advantages that the formwork is easy to support, the construction speed is high, and the foundation is suitable for all land sites, but the defects of large ground size, large concrete consumption and large excavation backfill amount due to large foundation bottom surface area exist; compared with a gravity expansion foundation, the beam-slab foundation has the advantages that the concrete consumption is greatly reduced, the beam-slab foundation is suitable for all onshore sites, and the beam-slab foundation also has the defects of large foundation earthwork amount, inconvenience in site construction, difficulty in template installation, small steel bar spacing and difficulty in vibrating and compacting concrete; the rock anchor rod foundation has the advantages that the bearing capacity of the bedrock can be fully applied, the using amount of concrete and reinforcing steel bars of the foundation can be obviously reduced, but the defect of insufficient corrosion resistance of the rock anchor rod exists, the foundation has potential safety hazards, the requirement on geological survey is high, the applicability is narrow, and the foundation is only suitable for rock foundations; the PH basis's advantage is that the cost is low, does not have loaded down with trivial details reinforcement engineering, and construction speed is fast, but has the plastic property of taking into account soil when having the difficult shortcoming design of purchasing of prestressed material and ripple section of thick bamboo, and the crab-bolt corrosion problem does not solve, has the potential safety hazard, and the replacement cost is big after the crab-bolt fracture.
Today, the wind power industry is fierce, land wind power needs more technical promotion and cost are gradually reduced behind industrialization, the service life of a general fan is 20-25 years, but the service life of the fan foundation far exceeds that of an upper fan, and therefore on the premise of ensuring the reliability of the foundation, it is very necessary to reduce the production cost of the foundation.
The utility model discloses a but self-adaptation stable control fan basis has characteristics with low costs, the good reliability to can guarantee to make the basis can undertake the produced load of bigger fan subassembly and guarantee the reliability after follow-up unit replacement, need not change the basis because of the replacement of upper portion component, and its simple structure, easily design and production, the transportation is convenient, and economic nature is higher, accords with the theory of current green low carbon.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the foundation ditch excavation volume that exists to current land fan foundation form is big, reinforced concrete volume is many, the single class defect of structural style, provides a but novel fan foundation of self-adaptation stability control. The purpose of the utility model is mainly to reduce the amount and size of the base material and improve the durability of the foundation.
The utility model adopts the following technical proposal:
a novel fan foundation capable of realizing self-adaptive stable control comprises a forward conical foundation, an inverted conical foundation, an EPS geotechnical foam block and an active adjusting system; the positive conical foundation is positioned at the upper part of the inverted conical foundation, a rubber layer is arranged outside the inverted conical foundation, a positive conical groove is reserved at the bottom of the inverted conical foundation, and the positive conical groove is of a structure with a small upper part and a large lower part; the EPS geotechnical foam block is arranged in the forward conical groove; the active adjusting system is arranged in the whole foundation, and the top of the positive conical foundation is provided with a prestressed anchor bolt for connecting the foundation and the fan tower drum and providing prestress for the foundation concrete, so that the foundation concrete is stressed, tension cracking of the foundation concrete is avoided, and the durability of the foundation concrete is improved; the forward conical foundation is a structure with a small top and a large bottom, and the reverse conical foundation is a structure with a large top and a small bottom.
In the above technical solution, further, the forward conical basis is an integrated structure formed by a cylinder and a circular truncated cone, the cylinder is located at the top of the circular truncated cone, and the radius of the cylinder is the same as the radius of the top surface of the circular truncated cone.
Furthermore, the radius of the top surface of the inverted conical foundation is the same as that of the bottom surface of the forward conical foundation.
Furthermore, the EPS geotechnical foam block is the same as the forward conical groove of the inverted cone foundation in shape, and the EPS geotechnical foam block and the forward conical groove are closely attached.
Further, the construction and installation process of the EPS geotechnical foam block is as follows: firstly cutting the EPS geotechnical foam block according to the size of the right conical groove, then paving dry-mixed cement mortar at the bottom of the foundation, and finally placing the EPS geotechnical foam block in the right conical groove; the EPS geotechnical foam blocks are connected with a construction base surface by adopting L-shaped metal pins, the depth of the L-shaped metal pins inserted into the construction base surface is not less than 20cm, and the bottoms of the EPS geotechnical foam blocks are densely connected by C10-C25 fine stone concrete after the EPS geotechnical foam blocks are arranged.
Furthermore, the length of the prestressed anchor bolt is 2-4 m, and the diameter size is determined by calculation according to the annual average wind speed of different wind fields; the wall thickness of the rubber layer is 3-6 cm, and the setting mode is as follows: after the foundation is set on the slope, the foundation is laid on the slope and then placed on the rubber layer.
Furthermore, the active adjusting system comprises a control system and 4 water tanks, wherein a water suction device and a water discharge device are arranged between every two adjacent water tanks, and each device comprises a plurality of motors (1 for standby and other normal use), a plurality of valves and a guide pipe.
Furthermore, the total volume of the water in the active adjusting system is 1.2 times of the volume of a single water tank (1.2 is a safety factor, so that the water tank is prevented from being ensured to have sufficient water and water is allowed to have certain loss), and a control system in the active adjusting system can receive signals from a yaw system wind speed sensor and a wind direction sensor of an upper fan unit and issue instructions for adjusting the distribution of the water in the water tank according to the signals.
Furthermore, the concrete mode of the active adjusting system for adjusting the water in the water tank is as follows: the distribution of the water is adjusted mainly according to the wind direction and the wind speed, and when the wind speed is lower than the cut-in speed of the fan, the control system evenly distributes the water among the four water tanks through the motor, the guide pipe and the valve; when the wind speed is higher than the cut-in wind speed of the fan, the control system can determine a wind direction interval according to signals of the wind direction sensor, and then water in each water tank is distributed according to the wind direction interval (the water is regarded as movable load and distributed in the water tank on the windward side to balance or reduce the upper overturning moment). The cut-in speed of the fan is determined when a fan manufacturer customizes the impeller and the yaw rotating system.
Furthermore, the pumping speed of the motor in the active adjusting system is 0.2-0.4 m3And the transportation time of water between adjacent water tanks is 2-2.5 minutes, the transmission time of water between the opposite water tanks (such as the water tanks 1 and 3) is 4-6 minutes, and compared with the cabin rotation speed of a yaw system of 0.5 degree/s, namely, the rotation of an upper fan unit (blade and cabin) by 180 degrees requires at least 6 minutes, and the lower active adjusting system has sufficient time to complete the transmission and distribution of water in the water tanks.
The utility model has the advantages of it is following:
the upper part of the tower is kept in the form of a traditional gravity type foundation, and can bear and disperse the load transmitted by the tower, the engine room and the impeller of the upper fan, so that the stress concentration of the foundation is avoided;
compared with the traditional fan foundation, the lower part of the fan foundation adopts an inverted cone structure, the lateral contact area between soil and the foundation is increased, the bearing capacity of the soil is fully exerted, the water-resistant smooth moving capacity of the foundation is further improved, and the inverted cone is matched with the slope toe at the lower part, so that the landfill amount of the filled soil is saved, and the construction workload is reduced;
the EPS geotechnical foam block at the bottom is widely applied to the highway foundation, the manufacture of a soil tyre in the traditional construction is omitted, the consumption of foundation concrete and the construction difficulty are greatly reduced, and the EPS geotechnical foam block has the advantages of light weight, high strength, strong chemical stability and water stability, good mechanical property and high interfacial friction coefficient, is further increased in contact with the foundation when placed at the inner side of the foundation, improves the vertical bearing capacity of the foundation, and is simple and convenient to construct and good in economy;
the water tank and the active adjusting system can reduce huge overturning moment transmitted by the upper assembly of the fan during normal work by adjusting the distribution of water, and reduce the consumption of reinforcing steel bars and concrete of the foundation, thereby reducing the cost, improving the durability of the foundation, enabling the foundation to be in service for a long time and conforming to sustainable development;
the interface friction coefficient of the rubber layer, the soil and the foundation is larger than the interface friction coefficient of the foundation and the soil, so that the rotation of the fan foundation can be effectively reduced; the prestressed anchor rod applies prestress, so that concrete under the tower footing is in a tension state, and the integral bearing capacity, durability and fatigue resistance are improved.
Drawings
FIG. 1 is an overall schematic view of the foundation of the present invention;
FIG. 2 is a schematic diagram of the distribution of the water tank and the control system;
FIG. 3 is a detailed view of a reference line and a reference angle of the water tank;
FIG. 4 is a graph comparing the load mechanism of the control system based on the presence or absence of active regulation; (a) before (b) after (b) adjusting;
wherein, 1 is a forward conical foundation, 2 is an inverted conical foundation, 3 is an EPS geotechnical foam block, 4 is an active adjusting system, 5 is a rubber layer, 6 is a prestressed anchor bolt, 7 is a water tank, 8 is a motor, 9 is a valve and 10 is a conduit.
Detailed Description
The technical solution of the present invention is further described below with reference to the following embodiments and accompanying drawings:
referring to fig. 1, the utility model discloses a novel fan foundation capable of self-adapting and stable control, which comprises a forward conical foundation 1, an inverted conical foundation 2, an EPS geotechnical foam block 3, an active adjusting system 4, an external rubber layer 5 and a prestressed anchor bolt 6; the positive conical foundation 1 is positioned at the upper part of the inverted conical foundation 2, the EPS geotechnical foam block is arranged in a positive conical groove at the bottom of the inverted conical foundation 2 and is tightly contacted with the inverted conical foundation 2, and the positive conical groove is of a structure with a small upper part and a large lower part; the active adjusting system 4 is arranged in the whole foundation, water in a water tank is adjusted through a sensor and a control system, a rubber layer 5 is arranged outside the inverted cone foundation 2, a prestressed anchor bolt 6 is arranged at the top of the foundation, the forward cone foundation 1 is of a structure with a small top and a large bottom, and the inverted cone foundation 2 is of a structure with a large top and a small bottom.
The method specifically comprises the following steps:
the right conical foundation 1 is an integrated structure formed by a cylinder and a circular truncated cone, the cylinder is positioned at the top of the circular truncated cone, the radius of the cylinder is 3m, the height of the cylinder is 0.65m, the radius of the top surface of the circular truncated cone is 3m, the radius of the bottom surface of the circular truncated cone is 8m, and the height of the circular truncated cone is 1.5 m.
The radius of the top surface of the inverted cone foundation 2 is 8m, the radius of the bottom surface is 5m, and the height is 2.5 m.
The EPS geotechnical foam block 3 is positioned in the forward conical groove of the inverted cone foundation 2, the radius of the top is 2m, the radius of the bottom is 3m, and the height is 2.5 m;
the EPS geotechnical foam block 3 construction installation process is as follows: cutting the EPS geotechnical foam block according to the size requirement, paving dry-mixed cement mortar at the bottom of the foundation pit, and placing the EPS geotechnical foam block in the right conical groove.
The EPS geotechnical foam block 3 is connected with a construction base surface by adopting L-shaped metal pins, the depth of the pins inserted into the construction base surface is not less than 20cm, and the bottom of the EPS geotechnical foam block 3 is densely connected by adopting C10-C25 fine stone concrete after being arranged.
The rubber layer 5 is located on the outer side of the inverted-cone-shaped foundation, the wall thickness is 3-6 cm, the rubber layer is laid on a slope after the foundation slope releasing is completed, and then the foundation is placed on the rubber layer.
The prestressed anchor bolt 6 is 2-4 m long, the diameter size is determined according to annual average wind speed calculation of different wind fields, and the prestressed anchor bolt is used for connecting a foundation and a fan tower cylinder and providing prestress for foundation concrete, so that the foundation concrete is stressed, tensile cracking of the foundation concrete is avoided, and the durability of the foundation concrete is improved.
Referring to fig. 2, 3 and table 1 the utility model discloses a novel initiative governing system of wind turbine foundation resistance overturning moment on land contains 4 water tanks 7 in this initiative governing system 4, is equipped with between two adjacent water tanks and inhales, the water discharging device, contains 8 motors 8(1 is reserve, 7 normal use) in every device, a plurality of valves 9, pipe 10 for transmit the water in the water tank 7, and be furnished with control system and inhale, the instruction drains with received signal and issue.
The method specifically comprises the following steps:
the total volume of water in the active regulating system 4 is 1.2 times of the volume of a single water tank and is about 240m3(1.2 is a safety factor, so that the water tank 7 is prevented from being ensured to have sufficient water, and the water is allowed to have certain loss).
The control system in the active adjusting system 4 can receive signals from wind speed and wind direction sensors of a yaw system of the fan unit, and issues instructions for adjusting the water distribution in the water tank 7 through the signals.
The distribution of water in the water tanks 7 in the active adjusting system 4 mainly depends on the wind direction and the wind speed, and when the wind speed is lower than the cut-in speed of the fan, the control system evenly distributes the water among the four water tanks 7 through the motor 8, the valve 9 and the conduit 10; when the wind speed is higher than the cut-in wind speed of the fan, the control system determines a wind direction interval according to the wind direction, and distributes water into each corresponding water tank 7 according to the wind direction interval (the water is regarded as a movable load and distributed in the water tanks on the windward side to reduce the overturning moment of the top surface of the foundation), and the specific distribution details are shown in fig. 4 and table 1.
TABLE 1 Water distribution in Water tanks for different wind directions
| Included angle between engine room and standard line | Water distribution | |
| 0 degree to 22.5 degrees and 337.5 degrees to 360 | Water tank | 1 |
| 22.5°～67.5° | |
|
| 67.5°～112.5° | Water tank 2 | |
| 112.5°～157.5° | Water tank 2+ |
|
| 157.5°～202.5° | |
|
| 202.5°～247.5° | |
|
| 247.5°～292.5° | |
|
| 292.5°～337.5° | |
The pumping speed of the motor 8 in the active adjusting system 4 is equal to 0.2-0.4 m3And the transportation time of water between the adjacent water tanks 7 is 2-2.5 minutes, the transportation time of water between the corresponding water tanks 7 is 4-6 minutes, and compared with the cabin rotation speed of a yaw system of 0.5 DEG/s, namely the upper fan unit (impeller and cabin) needs to rotate 180 minutes at least, and the lower active adjustment system has sufficient time to complete the transfer and distribution of water in the water tanks 7.
Claims (8)
1. A novel fan foundation capable of realizing self-adaptive stable control is characterized by comprising a forward conical foundation (1), an inverted conical foundation (2), an EPS geotechnical foam block body (3) and an active adjusting system (4); the forward conical foundation (1) is positioned at the upper part of the reverse conical foundation (2); a rubber layer (5) is arranged outside the inverted conical foundation (2), a forward conical groove is arranged at the bottom of the inverted conical foundation, and the forward conical groove is of a structure with a small upper part and a large lower part; the EPS geotechnical foam block (3) is positioned in the forward conical groove; the active adjusting system (4) is positioned in the whole foundation; the top of the positive conical foundation (1) is provided with a prestressed anchor bolt (6) for connecting the foundation and a fan tower drum and providing prestress for foundation concrete; the positive conical foundation (1) is of a structure with a small top and a large bottom, and the reverse conical foundation (2) is of a structure with a large top and a small bottom.
2. The novel fan foundation capable of realizing self-adaptive stable control according to claim 1, wherein the forward conical foundation (1) is an integrated structure formed by a cylinder and a circular truncated cone, the cylinder is positioned at the top of the circular truncated cone, and the radius of the cylinder is the same as that of the top surface of the circular truncated cone.
3. The novel wind turbine foundation capable of being adaptively and stably controlled according to claim 1, wherein the radius of the top surface of the inverted conical foundation (2) is the same as the radius of the bottom surface of the forward conical foundation (1).
4. The novel wind turbine foundation capable of realizing self-adaptive stable control according to claim 1, wherein the EPS geotechnical foam blocks (3) and the inverted cone-shaped foundation (2) are in the same shape of a forward conical groove and are closely attached to each other.
5. The novel fan foundation capable of realizing self-adaptive stable control according to claim 1, wherein the EPS geotechnical foam blocks (3) are connected with a construction base surface by adopting L-shaped metal pins, the depth of the L-shaped metal pins inserted into the construction base surface is not less than 20cm, and the bottoms of the EPS geotechnical foam blocks (3) are densely jointed by adopting C10-C25 fine stone concrete.
6. The novel fan foundation capable of being adaptively and stably controlled according to claim 1, wherein the thickness of the rubber layer (5) is 3-6 cm, and the length of the prestressed anchor bolt (6) is 2-4 m.
7. The new wind turbine foundation capable of adaptive stable control according to claim 1, wherein the active adjusting system (4) comprises a control system and 4 water tanks (7), a water suction device and a water discharge device are arranged between two adjacent water tanks, each device comprises a plurality of motors (8), a plurality of valves (9) and a conduit (10), and one of the motors is a standby motor.
8. The new wind turbine foundation capable of being adaptively and stably controlled according to claim 7, wherein the total volume of water in the active regulation system (4) is 1.2 times of the volume of a single water tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921074346.0U CN211340834U (en) | 2019-07-10 | 2019-07-10 | But novel fan basis of self-adaptation stable control |
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|---|---|---|---|
| CN201921074346.0U CN211340834U (en) | 2019-07-10 | 2019-07-10 | But novel fan basis of self-adaptation stable control |
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| CN211340834U true CN211340834U (en) | 2020-08-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116164151A (en) * | 2023-04-21 | 2023-05-26 | 东方电气集团东方电机有限公司 | Ball valve mounting structure and hydroelectric power generation system |
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2019
- 2019-07-10 CN CN201921074346.0U patent/CN211340834U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116164151A (en) * | 2023-04-21 | 2023-05-26 | 东方电气集团东方电机有限公司 | Ball valve mounting structure and hydroelectric power generation system |
| CN116164151B (en) * | 2023-04-21 | 2023-07-18 | 东方电气集团东方电机有限公司 | Ball valve mounting structure and hydroelectric power generation system |
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