High-precision independent variable pitch device for pool test of floating type wind turbine

Abstract

The invention discloses a floating type wind turbine pool test high-precision independent variable pitch device which comprises a main shaft, a plurality of blade root flanges, a fixing flange and a transmission mechanism, the main shaft is provided with a plurality of blade root hubs extending in the radial direction of the main shaft, the blade root hubs are arranged in an annular array mode in the circumferential direction of the main shaft, and the blade root flanges are multiple in number. The blade root flanges are coaxially and rotationally connected to the blade root hubs in a one-to-one correspondence mode, the main shaft comprises a coupling end and a fixing end which are opposite, the center of the fixing flange is fixedly installed at the fixing end, a plurality of transmission holes are formed in the fixing flange along the edge in an annular array mode, and the transmission holes correspond to the blade root flanges in a one-to-one mode. Each transmission mechanism is in transmission connection between the corresponding blade root flange and the corresponding transmission hole. The blade root flange can drive the blade connected to the blade root flange to rotate so as to adjust the pitch angle of the blade.

Description

Technical Field

[0001] The invention belongs to the field of floating wind power generation, and in particular relates to a high-precision independent variable pitch device for a floating wind turbine water tank test. Background Art

[0002] The development of offshore wind power is an important guarantee for promoting the transformation of my country's energy structure. With the continuous development of offshore wind resources, the development and utilization of wind energy will inevitably develop towards the deep sea where wind resources are more abundant. Due to the deep water conditions of the deep sea, the cost of using fixed wind turbines will rise sharply, so floating wind turbines will become the main equipment for the development of deep sea wind resources in the future.

[0003] Floating wind turbines work in an environment where wind, waves and currents act together. There is a complex coupling relationship between the environmental loads, component motion and structural vibration response of the unit, floating body and mooring system. This is a typical multi-field-multi-body coupling problem, and its load and motion response show obvious non-steady-state characteristics. When performing dynamic analysis on floating wind turbines, it is necessary to accurately consider the coupling effects of aerodynamics, hydrodynamics and mooring forces, which is also the main challenge facing the floating wind power field.

[0004] At present, the commonly used research methods mainly include water tank model test and integrated simulation. Water tank model test is the most commonly used research method in marine engineering and is also a necessary step to verify and optimize the design results of floating wind turbines. In the water tank test, due to the small size of the test model, the traditional variable pitch device has a complex structure and is difficult to install. Therefore, the fixed-pitch form is mostly used in the current floating wind turbine water tank test, which cannot simulate the various operating states of the unit. In addition, during the test, if the pitch angle of the blades needs to be changed, the test needs to be terminated, and the pitch angles of the three blades need to be adjusted by reinstalling the blades, which is cumbersome.

[0005] Therefore, it is very important to develop a high-precision independent pitch control device for floating wind turbine water tank test, which has simple structure, convenient operation, and is accurate and reliable. Summary of the invention

[0006] In view of the above problems, the present invention provides a high-precision independent pitch device for floating wind turbine pool test, which overcomes the above problems or at least partially solves the above problems. The technical solution is as follows:

[0007] A high-precision independent pitch device for a floating wind turbine water tank test comprises a main shaft, a blade root flange, a fixed flange and a transmission mechanism, wherein the main shaft is provided with a plurality of blade root hubs extending radially along the main shaft, and the plurality of blade root hubs are arranged in an annular array along the circumference of the main shaft, there are a plurality of blade root flanges, and the plurality of blade root flanges are coaxially rotatably connected to the plurality of blade root hubs in a one-to-one correspondence, the main shaft comprises a relative coupling end and a fixed end, the center of the fixed flange is fixedly mounted on the fixed end, a plurality of transmission holes are arranged in an annular array along the edge of the fixed flange, and the plurality of transmission holes correspond to the plurality of blade root flanges in a one-to-one correspondence, there are a plurality of transmission mechanisms, each of which is transmission-connected between a corresponding blade root flange and a transmission hole, and the transmission mechanism can transmit power from the fixed flange to the corresponding blade root flange to drive the blade root flange to rotate circumferentially along the corresponding blade root hub.

[0008] Compared with the prior art, the high-precision independent pitch device for floating wind turbine water tank test of the present invention has the following advantages:

[0009] By setting the main shaft, blade root flange, fixed flange and transmission mechanism, the adjustment power can be transmitted from the fixed flange to the blade root flange through the transmission mechanism, so that the blade root flange can drive the blade connected to the blade root flange to rotate to adjust the pitch angle of the blade. During the test operation, there is no need to remove and reinstall the blade to adjust the pitch angle. The adjustment operation is simple and convenient. The device is small in size, simple in structure, and relatively simple to install. At the same time, it can independently control the rotation of the three blade root flanges, so that each blade connected to the blade root flange can also be independently controlled.

[0010] The above-mentioned high-precision independent variable pitch device for floating wind turbine water tank test has the advantages of simple structure, high precision and easy implementation. It is suitable for installation and use in existing wind turbine water tank tests, and has low cost of use, saves test time and can improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the axonometric structure of the present invention;

[0012] Figure 2 It is a front view of the present invention;

[0013] Figure 3 is a schematic diagram of the connection structure between the main shaft and the blade root hub;

[0014] Figure 4 It is a schematic diagram of the blade root flange structure;

[0015] Figure 5 It is a schematic diagram of the structure in which the rack and the screw are connected;

[0016] Figure 6 It is a structural schematic diagram of a fixed flange;

[0017] Figure 7 It is a schematic diagram of the structure of the knob;

[0018] Description of Reference Numerals

[0019] 100 main shaft, 110 blade root hub;

[0020] 200 blade root flange, 210 base plate, 220 annular thin wall, 221 bolt hole, 230 positioning shoulder;

[0021] 300 fixing flange, 310 transmission hole, 320 positioning bolt;

[0022] 410 knob, 420 screw;

[0023] 510 gear column, 520 rack. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] When implementing: Figure 1-7 As shown, a high-precision independent pitch device for a floating wind turbine water tank test includes a main shaft 100, a blade root flange 200, a fixing flange 300 and a transmission mechanism. The main shaft 100 is provided with a plurality of blade root hubs 110 extending radially along the main shaft 100, and the plurality of blade root hubs 110 are arranged in a circumferential annular array along the main shaft 100. There are a plurality of blade root flanges 200, and the plurality of blade root flanges 200 are coaxially rotatably connected to the plurality of blade root hubs 110 in a one-to-one corresponding manner. The main shaft 100 includes a relative coupling end and a fixing end. The fixing flange 300 The center of the fixed flange 300 is fixedly installed on the fixed end, and a plurality of transmission holes 310 are arranged in a ring array along the edge. The plurality of transmission holes 310 correspond to the plurality of blade root flanges 200 one by one. There are a plurality of transmission mechanisms, and each of the transmission mechanisms is transmission-connected between a corresponding blade root flange 200 and a transmission hole 310. The transmission mechanism can transmit power from the fixed flange 300 to the corresponding blade root flange 200 to drive the blade root flange 200 to rotate circumferentially along the corresponding blade root hub 110.

[0026] Compared with the prior art, the high-precision independent pitch device for floating wind turbine water tank test of the present invention has the following advantages:

[0027] By setting the main shaft 100, blade root flange 200, fixed flange 300 and transmission mechanism, the adjustment power can be transmitted from the fixed flange 300 to the blade root flange 200 through the transmission mechanism, so that the blade root flange 200 can drive the blade connected to the blade root flange 200 to rotate to adjust the pitch angle of the blade, and during the test operation, there is no need to remove and reinstall the blade to adjust the pitch angle, and the adjustment operation is simple and convenient. The device is small in size, simple in structure, and relatively simple to install. At the same time, it can independently control the rotation of the three blade root flanges 200, so that each blade connected to the blade root flange 200 can also be independently controlled, and various operating states of the unit can be simulated.

[0028] The above-mentioned high-precision independent variable pitch device for floating wind turbine water tank test has the advantages of simple structure and easy implementation. It is suitable for installation and use in existing wind turbine water tank tests. It has low cost of use, saves test time, and can improve efficiency.

[0029] In this embodiment, Figure 1-7 As shown, the transmission mechanism includes an adjusting component and a gear component. The adjusting component is installed in the corresponding transmission hole 310 , and the gear component is transmission-connected to the corresponding blade root flange 200 . The adjusting component and the gear component are transmission-connected.

[0030] In this way, by setting up the adjustment component and the gear component, power can be transmitted from the fixed flange 300 to the blade root flange 200 through the adjustment component and the gear component, and the rotation of the blade root flange 200 can be controlled by manually adjusting the adjustment component to control the rotation of the blades on the blade root flange 200.

[0031] In this embodiment, Figure 1-7 As shown, the adjustment assembly includes a knob 410 and a screw rod 420, the knob 410 includes a relative embedded end and a rotating end, the embedded end is rotatably arranged in the corresponding transmission hole 310, the rotating end is located outside the outer side surface of the fixing flange 300, a threaded hole is opened through the knob 410 along the axial direction, the screw rod 420 includes a relative first end and a second end, the first end is transmission-connected in the threaded hole.

[0032] In this way, by setting the knob 410 and the screw 420, the screw 420 can be controlled to move along the axial direction by turning the knob 410. Since the rotation of the knob 410 and the axial displacement of the screw 420 have the characteristic of a high transmission ratio, the axial displacement adjustment of the screw 420 driven by the rotation of the knob 410 can achieve fine-tuning of the axial movement of the screw, thereby achieving fine-tuning of the rotation of the blade root flange 200, making the blade pitch angle control more precise, and due to the self-locking nature of the screw transmission, the blade cannot drive the rotation of the knob 410 under the action of an external force, thereby ensuring the precise locking of the blade pitch angle position, thereby improving the test accuracy and the reliability of the test results.

[0033] In this embodiment, Figure 1-7 As shown, the gear assembly includes a gear column 510 and a rack 520, the gear column 510 is coaxially fixedly connected to the bottom of the blade root flange 200, a bearing hole is coaxially arranged in the gear column 510, and the gear column 510 is coaxially rotatably connected to the corresponding blade root hub 110 through the bearing hole, and the rack 520 includes a third end, the rack 520 is meshed with the gear column 510, and the third end is fixedly connected to the second end of the screw 420.

[0034] In this way, by setting the gear column 510 and the rack 520, the screw 420 can drive the rack 520 to move along the axial direction of the screw 420, and at the same time, the rack 520 and the gear column 510 are meshed, so that the screw 420 controls the gear column 510 to rotate through the rack 520, so as to drive the blade root flange 200 to rotate, and at the same time, the screw 420 can drive the rack 520 to move axially by rotation, but the axial movement of the rack 520 cannot push the screw to move axially, thereby realizing the self-locking characteristics of the screw 420 during transmission, reducing the deflection of the blade and the blade root flange 200 caused by external force, ensuring the accurate locking of the blade pitch angle position, and improving the test accuracy and the reliability of the test results.

[0035] In this embodiment, Figure 1-7 As shown, the blade root flange 200 includes a bottom plate 210 and an annular thin wall 220 . The bottom plate 210 is fixedly connected to the top surface of the gear column 510 , and the annular thin wall 220 is fixedly mounted on the top surface of the bottom plate 210 .

[0036] In this way, by setting the bottom plate 210 and the annular thin wall 220, the blade can be fixedly connected to the blade root flange 200 through the bottom plate 210 and the annular thin wall 220, the blade is axially positioned by the bottom plate 210, and the blade is radially positioned by the annular thin wall 220, the positioning structure is simple, and the positioning is more reliable.

[0037] In this embodiment, Figure 1-7As shown, the outer edge of the bottom plate 210 protrudes from the outer side wall of the annular thin wall 220 to form a positioning shoulder 230 .

[0038] In this way, the outer edge of the bottom plate 210 is protruded to form a positioning shoulder 230, so that the axial positioning effect of the blade installed on the bottom plate 210 is further improved.

[0039] In this embodiment, Figure 1-7 As shown, a plurality of bolt holes 221 are arranged on the outer side wall of the annular thin wall 220 in a circumferential array.

[0040] In this way, by providing the bolt holes 221 , when the blade is mounted on the annular thin wall 220 on the blade root flange 200 , it can be further positioned by inserting bolts between the bolt holes 221 and the blade, thereby enhancing the positioning effect.

[0041] In this embodiment, Figure 1-7 As shown, it also includes a positioning bolt 320. A screw hole is axially arranged on the fixed end of the main shaft 100, and a fixing hole is centrally arranged on the fixing flange 300. The positioning bolt 320 passes through the fixing hole and is positioned and connected with the screw hole.

[0042] In this way, the positioning effect between the fixed flange 300 and the main shaft 100 is further enhanced by the positioning bolt 320, and there is only one positioning point, the structure is relatively simple, easy to implement, and the positioning effect is better.

[0043] The above are only preferred implementations of the present invention. It should be pointed out that a number of modifications and improved technical solutions made by those skilled in the art without departing from the technical solution should also be deemed to fall within the scope of protection required by the claims.

Claims

1. A high-precision independent pitch device for floating wind turbine pool testing, characterized in that: The invention comprises a main shaft, a blade root flange, a fixed flange and a transmission mechanism, wherein the main shaft is provided with a plurality of blade root hubs extending radially along the main shaft, and the plurality of blade root hubs are arranged in a circumferential annular array along the main shaft, there are a plurality of blade root flanges, and the plurality of blade root flanges are coaxially rotatably connected to the plurality of blade root hubs in a one-to-one manner, the main shaft comprises a relative coupling end and a fixed end, the center of the fixed flange is fixedly mounted on the fixed end, a plurality of transmission holes are arranged in an edge annular array on the fixed flange, the plurality of transmission holes correspond one-to-one to the plurality of blade root flanges, there are a plurality of transmission mechanisms, each of the transmission mechanisms is transmission-connected between a corresponding blade root flange and a transmission hole, and the transmission mechanism can transmit power from the fixed flange to the corresponding blade root flange to drive the blade root flange to rotate circumferentially along the corresponding blade root hub.

2. A high-precision independent pitch device for floating wind turbine pool testing according to claim 1, characterized in that: The transmission mechanism comprises an adjusting assembly and a gear assembly. The adjusting assembly is installed in the corresponding transmission hole. The gear assembly is transmission-connected to the corresponding blade root flange. The adjusting assembly and the gear assembly are transmission-connected.

3. A high-precision independent pitch device for floating wind turbine pool testing according to claim 2, characterized in that: The adjustment assembly includes a knob and a screw rod, the knob includes a relative embedded end and a rotating end, the embedded end is rotatably arranged in the corresponding transmission hole, the rotating end is located outside the outer side surface of the fixing flange, a threaded hole is opened through the knob along the axial direction, the screw rod includes a relative first end and a second end, and the first end is transmission-connected in the threaded hole.

4. A high-precision independent pitch device for floating wind turbine pool testing according to claim 3, characterized in that: The gear assembly includes a gear column and a rack, the gear column is coaxially fixedly connected to the bottom of the blade root flange, a bearing hole is coaxially arranged in the gear column, and the gear column is coaxially rotatably connected to the corresponding blade root hub through the bearing hole, and the rack includes a third end portion, the rack is meshed with the gear column, and the third end portion is fixedly connected to the second end portion of the screw.

5. A high-precision independent pitch device for floating wind turbine pool testing according to claim 4, characterized in that: The blade root flange comprises a bottom plate and an annular thin wall, the bottom plate is fixedly connected to the top surface of the gear column, and the annular thin wall is fixedly mounted on the top surface of the bottom plate.

6. A high-precision independent pitch device for floating wind turbine pool testing according to claim 5, characterized in that: The outer edge of the bottom plate protrudes from the outer side wall of the annular thin wall to form a positioning shoulder.

7. The high-precision independent pitch device for floating wind turbine pool testing according to claim 5, characterized in that: A plurality of bolt holes are arranged on the outer side wall of the annular thin wall in a circumferential array.

8. The high-precision independent pitch device for floating wind turbine pool testing according to claim 1 is characterized by: It also includes a positioning bolt. A screw hole is axially arranged on the fixed end of the main shaft, a fixing hole is arranged at the center of the fixing flange, and the positioning bolt passes through the fixing hole and is positioned and connected with the screw hole.

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