Speed-increasing fan tube support structure

Abstract

The present invention discloses a speed-increasing fan tube support structure, which includes a support platform, a first support column, a second support column, a first core shaft, a second core shaft, a first support rod assembly, a first cable assembly, a second support rod assembly, and a second cable assembly. The first support column and the second support column are arranged side by side on the top of the support platform, and the bottom of the support platform is installed on the top of the tower. The first core shaft is fixed on the top of the first support column, the inner side of the first core shaft is connected to the speed-increasing tube through a plurality of first support rod assemblies, and the outer side of the first core shaft is connected to the speed-increasing tube through a plurality of first cable assemblies. The second core shaft is fixed on the top of the second support column, the inner side of the second core shaft is connected to the speed-increasing tube through a plurality of second support rod assemblies, and the outer side of the second core shaft is connected to the speed-increasing tube through a plurality of second cable assemblies. The present invention has the beneficial effects of reasonable structure, light weight, high strength, and easy installation and transportation.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and more particularly to a speed-increasing wind turbine tube support structure. Background Art

[0002] Wind energy is a renewable, clean energy source with vast reserves and widespread distribution. However, it also has many significant weaknesses, including: 1. Low density. This is a key drawback of wind energy. Since wind energy originates from the movement of air, which is very dense, the energy density of wind power is also very low, only 1 / 816 of that of water power. 2. Instability. Due to the ever-changing nature of airflow, wind pulsation, daily, seasonal, and even interannual variations are very pronounced, with large fluctuations and extreme instability. 3. Large regional differences. Due to the influence of topography, regional differences in wind power are very significant. In a neighboring area, wind power under favorable terrain is often several times, or even dozens of times, higher than under unfavorable terrain.

[0003] While speed-increasing tube-type wind turbines can increase wind energy density through tube speed increase, stabilize wind pulsation through tube diversion, and adapt to low wind speed areas, broadening the applicable wind speed range of wind turbines and providing high economic and social benefits, the unstable wind speed caused by the speed-increasing tube outside the rotor results in a large wind-exposed area for high-power speed-increasing tube-type wind turbines, posing new requirements and challenges for the overall structural design. Summary of the Invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a speed-increasing fan tube support structure which has a reasonable structure, is light in weight, has high strength, and is easy to install and transport.

[0005] According to one aspect of the present invention, a speed-increasing fan tube support structure is provided, which includes a supporting platform, a first support column, a second support column, a first core shaft, a second core shaft, a first support rod assembly, a first cable assembly, a second support rod assembly and a second cable assembly. The first support column and the second support column are arranged side by side on the top of the supporting platform, and the bottom of the supporting platform is installed on the top of the tower. The first core shaft is fixed on the top of the first support column, the inner side of the first core shaft is connected to the speed-increasing tube through a number of first support rod assemblies, and the outer side of the first core shaft is connected to the speed-increasing tube through a number of first cable assemblies. The second core shaft is fixed on the top of the second support column, the inner side of the second core shaft is connected to the speed-increasing tube through a number of second support rod assemblies, and the outer side of the second core shaft is connected to the speed-increasing tube through a number of second cable assemblies.

[0006] In some embodiments, a first base, a second base and a yaw nacelle are provided on the support platform, the first support column is installed in the first base, the second support column is installed in the second base, and a yaw machine connecting tower is provided in the yaw nacelle.

[0007] In some embodiments, a plurality of first flanges are provided on the inner side of the first core shaft, and there are 4-24 first flanges. A bolt height adjustment portion is provided between the first support rod assembly and the first flange. A fixed flange is provided on the outer side of the first core shaft, and a plurality of mounting holes are provided on the fixed flange. The first cable assembly is connected to the first core shaft and the speed increasing tube through the mounting holes.

[0008] In some embodiments, the first support rod assembly includes a main support rod and a secondary support rod, one end of the main support rod is connected to the first flange through a bolt height adjustment part, the other end of the main support rod is fixed to the speed increasing tube through the second flange, the main support rod is connected to the secondary support rod through a third flange, and an elastic gasket is provided between the third flange and the secondary support rod.

[0009] In some embodiments, the first cable assembly includes a steel cable and a tightening part. The steel cable is provided with a tightening part that can control the length of the steel cable. One end of the steel cable is connected to the mounting hole through the locking part, and the other end of the steel cable is connected to the speed increasing tube through the fourth flange.

[0010] In some embodiments, a transmission chain support platform is provided at the top of the second support column, an oblique support rod is provided at the end of the transmission chain support platform away from the second support column, and the oblique support rod connects the transmission chain support platform and the second support column, and the second core shaft is arranged on the top of the second support column through the transmission chain support platform, and the second core shaft includes an inner fixed flange, an outer fixed flange and a fixed rod, the inner fixed flange is arranged on one end of the transmission chain support platform close to the speed increasing tube, the outer fixed flange is arranged on the end of the transmission chain support platform away from the speed increasing tube, and the fixed rod connects the inner fixed flange and the outer fixed flange.

[0011] In some embodiments, the inner fixed flange is connected to one end of the second support rod assembly through a bolt height adjustment portion, the other end of the second support rod assembly is connected to the speed increasing tube through a fifth flange, and the second cable assembly connects the outer fixed flange and the speed increasing tube.

[0012] In some embodiments, the structure of the second support rod assembly is the same as that of the first support rod assembly, and the structure of the second cable assembly is the same as that of the first cable assembly.

[0013] In some embodiments, a first secondary support column is fixedly provided on one side of the first support column close to the speed-increasing tube, and the bottom of the first secondary support column is fixedly connected to the bottom of the speed-increasing tube. A second secondary support column is fixedly provided on one side of the second support column close to the speed-increasing tube, and the bottom of the second secondary support column is fixedly connected to the bottom of the speed-increasing tube.

[0014] In some embodiments, a climbing ladder is provided on the second secondary support column.

[0015] Since the diameter of a large-power speed-increasing tube often reaches tens of meters, the wind-exposed area of ​​the speed-increasing tube is very large, and large stress and strain will be generated under extreme wind speed conditions. It is difficult for a general supporting structure to meet the strength and rigidity requirements. The present invention ensures the cylindricity of the tube well through the support rod structure inside the tube. The wind load on the tube is transmitted to the front and rear core shafts through the support structure inside the tube, and then transmitted to the front and rear support rods by the core shaft, and finally transmitted to the support platform by the front and rear support rods; the front end of the core shaft is also evenly connected with steel cables to further tighten the tube, thereby improving the wind resistance of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of the speed-increasing fan tube support structure of the present invention;

[0017] Figure 2 This is a front view of the speed-increasing fan tube support structure of the present invention;

[0018] Figure 3 yes Figure 2 A partial enlarged view of middle A;

[0019] Figure 4 yes Figure 2 A partial enlarged view of B in the middle;

[0020] Figure 5 yes Figure 2 A partial enlarged view of center C;

[0021] Figure 6 This is a schematic structural diagram of the support platform of the speed-increasing fan tube support structure of the present invention;

[0022] Figure 7 This is a schematic diagram of the installation of the first support column and the second support column of the speed-increasing fan tube support structure of the present invention;

[0023] Figure 8 This is a structural schematic diagram of the first cable assembly of the speed-increasing fan tube support structure of the present invention;

[0024] Figure 9 This is a structural diagram of the connection assembly of the speed-increasing fan tube support structure of the present invention;

[0025] Figure 10 It is a structural schematic diagram of the bolt height adjustment portion of the speed-increasing fan tube support structure of the present invention. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods or structures made by ordinary technicians in this field based on these embodiments are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meaning of the terms can be understood according to the specific circumstances.

[0028] like Figure 1 As shown, the present invention describes a speed-increasing fan tube support structure, which includes a supporting platform 1, a first support column 2, a second support column 3, a first core shaft 4, a second core shaft 5, a first support rod assembly 6, a first cable assembly 7, a second support rod assembly 8 and a second cable assembly 9. The first support column 2 and the second support column 3 are arranged side by side on the top of the supporting platform 1, and the bottom of the supporting platform 1 is installed on the top of the tower. The first core shaft 4 is fixed on the top of the first support column 2, and the inner side of the first core shaft 4 is connected to the speed-increasing tube through a number of first support rod assemblies 6, and the outer side of the first core shaft 4 is connected to the speed-increasing tube through a number of first cable assemblies 7. The second core shaft 5 is fixed on the top of the second support column 3, and the inner side of the second core shaft 5 is connected to the speed-increasing tube through a number of second support rod assemblies 8, and the outer side of the second core shaft 5 is connected to the speed-increasing tube through a number of second cable assemblies 9.

[0029] The main support rod 61 in the tube is connected to the base on the tube single plate, and the main support rods 61 are supported and tightened by the secondary support rods 62. The bottom of the main support rod 61 is connected to the first core shaft 4 and the second core shaft 5. The height between the first core shaft 4 and the second core shaft 5 and the bottom of the main support rod 61 is adjusted by adjusting bolts to ensure the cylindricity of the tube and facilitate installation. There are elastic washers between the main support rod 61 and the secondary support connecting parts in the tube to play a buffering role and avoid resonance; the first core shaft 4 is welded to the first support column 2, and the front end of the first core shaft 4 is evenly distributed with multiple connecting flanges for connecting one end of the steel cable structure, and the other end of the steel cable is connected to the connecting flange on the tube inlet to tighten the entire tube; the second core shaft 5 is welded to the second support column 3, and the rear end of the second core shaft 5 is evenly distributed with multiple connecting flanges for connecting one end of the steel cable structure, and the other end of the steel cable is connected to the tube outlet The flange connection secures the entire tube. Multiple support rods securely connect the front and rear rings of the second core shaft 5. The rear ring is fixedly connected to the rear support rod. A transmission chain support platform 31 is fixedly connected between the front and rear rings. An oblique support rod 32 is provided between the transmission chain support platform 31 and the rear support rod, forming a triangular stable structure. Both the first support column 2 and the second support column 3 are equipped with a first secondary support column 21 and a second secondary support column 32. A double-tube support structure is adopted. A closed loop structure is formed between the front and rear support rods through a single plate at the bottom of the tube to improve the overall structural performance of the unit. The first support column and the second support column 3 are connected to the base of the support platform 1. A cylindrical cabin is provided in the support platform 1 for installing some equipment and serving as a resting platform. The bottom of the cylindrical cabin is connected to the yaw bearing. The support platform supports the weight of the entire tube and is constructed by connecting various profiles. This provides a support structure for the tube of a speed-increasing wind turbine. Since the diameter of a high-power speed-increasing tube often reaches tens of meters, the wind-exposed area of ​​the speed-increasing tube is very large. Under extreme wind speed conditions, significant stress and strain will be generated. Conventional support structures are difficult to meet the strength and stiffness requirements. The present invention ensures the cylindricity of the tube well through the support rod structure inside the tube. The wind load on the tube is transmitted to its front and rear core shafts through the support structure inside the tube, and then transmitted to the front and rear support rods by the core shaft, and finally transmitted to the support platform by the front and rear support rods; the front end of the core shaft is also evenly connected with steel cables to further tighten the tube, thereby improving the wind resistance of the unit.

[0030] like Figure 6As shown, a first base 11, a second base 12 and a yaw nacelle 13 are provided on the support platform 1, a first support column 2 is installed in the first base 11, a second support column 3 is installed in the second base 12, and a yaw machine connected to the tower is arranged in the yaw nacelle 13. The support platform 1 adopts an inverted isosceles trapezoidal structure, which makes it convenient to provide a larger installation space on the top of the support platform 1, wherein the first base 11 and the second base 12 are symmetrically arranged about the vertical center axis of the support platform 1, so that the support platform 1 is uniformly stressed, wherein the yaw nacelle 13 is arranged in the middle of the support platform 1, a partition is provided in the middle of the yaw nacelle 13, a yaw bearing is provided at the bottom of the yaw nacelle 13 to connect the yaw motor installed on the top of the tower, and the upper part of the yaw nacelle 13 can be used as a chamber for installing some equipment and as a rest platform.

[0031] like Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, a plurality of first flanges 41 are provided on the inner side of the first core shaft 4, with 6 to 16 first flanges 41 provided. A bolt height adjustment portion 42 is provided between the first support rod assembly 6 and the first flange 41. A fixing flange 43 is provided on the outer side of the first core shaft 4, with a plurality of mounting holes 44 provided on the fixing flange 43. The first cable assembly 7 connects the first core shaft 4 and the speed-increasing tube through the mounting holes 44. The number of first flanges 41 is set according to the size of the speed-increasing tube, because the speed-increasing tube is supported by the first support rod assembly 6. The bolt height adjustment portion 42 is further used to adjust the position of the first support rod assembly 6 to ensure the cylindricity of the speed-increasing tube and facilitate installation.

[0032] like Figure 10 As shown, the bolt height adjustment portion 42 includes a connecting flange, a bolt and a nut. The first flange 41 is fixedly connected to the first core shaft 4, wherein the bottom of the bolt is used to fix the first flange 41, and then the first flange 41 is locked with a nut. Further, a nut is first screwed on the upper part of the bolt and then the upper connecting flange is installed, and then a nut is used to fix the upper connecting flange. The distance between the two flanges is adjusted by adjusting the two nuts on the upper part.

[0033] The first support rod assembly 6 includes a main support rod 61 and a secondary support rod 62. One end of the main support rod 61 is connected to the first flange 41 through a bolt height adjustment portion 42, and the other end of the main support rod 61 is fixed to the speed-increasing tube through a second flange 63. The main support rod 61 is connected to the secondary support rod 62 through a third flange 64. The speed-increasing tube is supported by the main support rod 61, and the bolt height adjustment portion 42 is used to adjust the position of one end of the main support rod 61 and the first core shaft 4, thereby adjusting the cylindricity of the speed-increasing tube. The secondary support rod 62 is usually arranged in the middle position of the main support rod 61, and the third flange 64 is usually welded in the middle of the main support rod 61. The secondary support rod 62 is installed between two adjacent main support rods 61, and the secondary support rod 62 forms a complete surround. An elastic gasket is provided between the third flange 64 and the secondary support rod 62, and the elastic gasket is used to act as a buffer to avoid resonance.

[0034] like Figure 8 As shown, the first cable assembly 7 includes a steel cable 71 and a tightening portion 72. The steel cable 71 is provided with a tightening portion 72, which can control the length of the steel cable 71. One end of the steel cable 71 is connected to the mounting hole 44 through a locking portion 73, and the other end of the steel cable 71 is connected to the speed-increasing tube through a fourth flange 74. The locking portion 73 is U-shaped, with symmetrical holes in the middle, and is fixed by bolts passing through the mounting hole 44 and the locking portion 73. Both ends of the steel cable 71 are fixed by the locking portion 73. The tightening portion 72 can shorten the length of the steel cable 71. The first cable assembly 7 is provided with 2-98 pieces. According to the design requirements of the power size of a single unit, the tube can be made in multiple pieces, and the number is an integer multiple of the cables. The number of cables can be appropriately increased or decreased according to the specific situation. The optimal number is 4-48, evenly distributed on the tube.

[0035] In the present invention, the first support rod assembly 6 is used for support, and the first cable assembly 7 is used for tensioning, and the entire tube is tightened by a pull-and-push fixing method, so that the speed-increasing tube has a more stable use state during use.

[0036] like Figure 7As shown, a transmission chain support platform 31 is provided at the top of the second support column 3. An oblique support rod 32 is provided at the end of the transmission chain support platform 31 away from the second support column 3. The oblique support rod 32 connects the transmission chain support platform 31 and the second support column 3. The second core shaft 5 is arranged at the top of the second support column 3 through the transmission chain support platform 31. The second core shaft 5 includes an inner fixing flange 51, an outer fixing flange 52 and a fixing rod 53. The inner fixing flange 51 is provided on the transmission chain support platform 31 at one end close to the speed-increasing tube. The outer fixing flange 52 is provided on the transmission chain support platform 31 at one end away from the speed-increasing tube. The fixing rod 53 connects the inner fixing flange 51 and the outer fixing flange 52. Since a wind turbine needs to be installed at the top of the second support column 3, a transmission chain support platform 31 needs to be provided at the top of the second support column 3. Therefore, the wind turbine and the second core shaft 5 are both installed on the transmission chain support platform 31.

[0037] The inner fixed flange 51 is connected to one end of the second support rod assembly 8 through the bolt height adjustment part 42, and the other end of the second support rod assembly 8 is connected to the speed increasing tube through the fifth flange 81. The second cable assembly 9 connects the outer fixed flange 52 and the speed increasing tube.

[0038] The structure of the second support rod assembly 8 is identical to that of the first support rod assembly 6, and the structure of the second cable assembly 9 is identical to that of the first cable assembly 7. By simultaneously securing the speed-increasing tube at both ends, the tube's strength is increased, making it more stable during use. The optimal number of second support rod assemblies 8 is the same as the number of first support rod assemblies 6; the number of second cable assemblies 9 is the same as the number of first cable assemblies 7.

[0039] like Figure 9 As shown, a first secondary support column 21 is fixedly mounted on the side of the first support column 2 near the speed-increasing tube, with the bottom of the first secondary support column 21 fixedly connected to the bottom of the speed-increasing tube. A second secondary support column 32 is fixedly mounted on the side of the second support column 3 near the speed-increasing tube, with the bottom of the second secondary support column 32 fixedly connected to the bottom of the speed-increasing tube. Both the first support column 2 and the second support column 3 are equipped with a first secondary support column 21 and a second secondary support column 32. They adopt a double-circular tube support structure, with a closed loop formed between the front and rear support rods through a single plate at the bottom of the tube, improving the overall structural performance of the unit.

[0040] A climbing ladder 33 is provided on the second auxiliary support column 32. The climbing ladder 33 is used to facilitate maintenance personnel to enter the transmission chain support platform 31 to maintain the wind turbine.

[0041] The structural strength analysis of the technical solution disclosed in the present invention is carried out, and the working conditions are: the incoming wind speed is 0°&90°, 36m / s, and the overall strength analysis of the unit is carried out under the action of gravity load.

[0042] The wind pressure calculation formula is: P=V2 / 1600 Kpa

[0043] Therefore, the wind pressure at 36 m / s is 8.1×10-4 MPa. The strength of the structure where the first and second auxiliary support columns 21 and 32 are connected to the speed increasing tube should be strengthened as much as possible, and multiple reinforcing ribs should be provided in the horizontal or vertical direction of the support platform 1 as necessary.

[0044] Statistics of simulation results:

[0045]

[0046] Summary: ① At a wind speed of 36m / s, the stress on the entire upper portion of the tube is <345MPA. In fact, except for a few individual locations, the stress on the entire upper portion of the tube is <235MPA. The overall structural strength of the tube meets the requirements, and the wall thickness and size of the tube profile can be appropriately reduced to achieve the purpose of weight reduction. ② The tube skeleton material can be selected from ordinary carbon steel Q235 or Q275, or the profile and material can be changed to an aluminum alloy skeleton for comparative analysis. ③ The bottom plate of the tube needs to be designed with a separate strength design to serve as a bridge connecting the front and rear support rods, forming a closed loop for the entire structure. ④ The strength and rigidity of the support platform must be guaranteed. Micro-deformations of the support platform can be magnified into large deformations of tens or hundreds of millimeters at the upper portion of the tube. ⑤ The front and rear support structures have weak crosswind resistance, resulting in significant overall structural deformation. This can be addressed by increasing the rigidity of the front and rear support rods and increasing the number of steel ropes within the tube.

[0047] The above are only some embodiments of the present invention. It should be pointed out that for ordinary technicians in this field, other variations and improvements can be made without departing from the creative concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. The speed-increasing fan tube support structure is characterized by: The tower comprises a supporting platform, a first supporting column, a second supporting column, a first core shaft, a second core shaft, a first supporting rod assembly, a first cable assembly, a second supporting rod assembly and a second cable assembly, wherein the first supporting column and the second supporting column are arranged side by side on the top of the supporting platform, and the bottom of the supporting platform is installed on the top of the tower, the first core shaft is fixed to the top of the first supporting column, the inner side of the first core shaft is connected to the speed-increasing tube through a plurality of first supporting rod assemblies, the outer side of the first core shaft is connected to the speed-increasing tube through a plurality of first cable assemblies, the second core shaft is fixed to the top of the second supporting column, the inner side of the second core shaft is connected to the speed-increasing tube through a plurality of second supporting rod assemblies, and the outer side of the second core shaft is connected to the speed-increasing tube through a plurality of second cable assemblies; A plurality of first flanges are provided on the inner side of the first core shaft, with 4 to 24 first flanges provided. A bolt height adjustment portion is provided between the first support rod assembly and the first flange. A fixing flange is provided on the outer side of the first core shaft, with a plurality of mounting holes provided on the fixing flange. The first cable assembly is connected to the first core shaft and the speed increasing tube through the mounting holes. The second core shaft is arranged on the top of the second support column through the transmission chain support platform, and the second core shaft includes an inner fixed flange, an outer fixed flange and a fixing rod. The inner fixed flange is arranged on the transmission chain support platform at one end close to the speed-increasing tube, and the outer fixed flange is arranged on the transmission chain support platform at one end away from the speed-increasing tube, and the fixing rod connects the inner fixed flange and the outer fixed flange; The inner fixed flange is connected to one end of the second support rod assembly through a bolt height adjustment portion, the other end of the second support rod assembly is connected to the speed increasing tube through a fifth flange, and the second cable assembly is connected to the outer fixed flange and the speed increasing tube.

2. The speed-increasing fan tube support structure according to claim 1, characterized in that: The supporting platform is provided with a first base, a second base and a yaw nacelle, the first support column is installed in the first base, the second support column is installed in the second base, and a yaw machine connecting tower is provided in the yaw nacelle.

3. The speed-increasing fan tube support structure according to claim 2, characterized in that: The first support rod assembly includes a main support rod and a secondary support rod. One end of the main support rod is connected to the first flange through a bolt height adjustment part, and the other end of the main support rod is fixed to the speed increasing tube through a second flange. The main support rod is connected to the secondary support rod through a third flange, and an elastic gasket is provided between the third flange and the secondary support rod.

4. The speed-increasing fan tube support structure according to claim 3, characterized in that: The first cable assembly includes a steel cable and a tightening part. The steel cable is provided with a tightening part, and the tightening part can control the length of the steel cable. One end of the steel cable is connected to the mounting hole through the locking part, and the other end of the steel cable is connected to the speed increasing tube through the fourth flange.

5. The speed-increasing fan tube support structure according to claim 1, characterized in that: A transmission chain support platform is provided on the top of the second support column. An oblique support rod is provided at one end of the transmission chain support platform away from the second support column, and the oblique support rod connects the transmission chain support platform and the second support column.

6. The speed-increasing fan tube support structure according to claim 5, characterized in that: The structure of the second support rod assembly is the same as that of the first support rod assembly, and the structure of the second cable assembly is the same as that of the first cable assembly.

7. The speed-increasing fan tube support structure according to claim 1, characterized in that: A first secondary support column is fixedly provided on the side of the first support column close to the speed-increasing tube, and the bottom of the first secondary support column is fixedly connected to the bottom of the speed-increasing tube. A second secondary support column is fixedly provided on the side of the second support column close to the speed-increasing tube, and the bottom of the second secondary support column is fixedly connected to the bottom of the speed-increasing tube.

8. The speed-increasing fan tube support structure according to claim 7, characterized in that: A climbing ladder is provided on the second secondary support column.

Images