Windmill and generator set

Abstract

The utility model relates to a windmill which comprises an installation frame and a rotating frame installed in the installation frame in a rotating mode, a thin film is fixedly installed on the rotating frame, one side of the thin film is fixedly connected with the rotating frame, and the other three sides of the thin film are free sides. The film located on one side of the central axis of the rotating frame is attached to the rotating frame to generate thrust to push the rotating frame to rotate in the mounting frame, and the film located on the other side of the central axis of the rotating frame is separated from the rotating frame. When the direction of ocean current or wind moves from one side of the rotating frame to the other side of the rotating frame, the ocean current or the wind can only act on the thin film on one side of the rotating frame, and the ocean current or the wind on the other side of the rotating frame can smoothly pass through the other side of the rotating frame. Therefore, only one thrust can be generated on the rotating frame. Therefore, the rotating speed and the rotating efficiency of the rotating frame are higher under the action of the same external acting force. In other words, the energy conversion efficiency is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation, and in particular to a windmill and a generator set. Background Art

[0002] Windmills, also known as wind turbines, are a type of power machine that does not require fuel and uses wind as energy. Modern wind turbines are mostly used for power generation. Wind power generation is the process of converting the kinetic energy of wind into mechanical kinetic energy, and then converting mechanical energy into electrical energy. The principle of wind power generation is to use wind power to drive the windmill blades to rotate, and then increase the speed of rotation through a speed increaser to drive the generator to generate electricity. According to windmill technology, power generation can begin at a breeze speed of about three meters per second.

[0003] Tidal power generation is a form of hydroelectric power generation that uses the movement of tidal currents or the rise and fall of tidal sea levels to obtain energy. Due to its renewable nature and environmental friendliness, tidal energy is a strategically important new energy source to be developed.

[0004] For example, the Chinese patent with publication number CN116461653A discloses an off-grid deep-sea observation system based on a thin-film blade ocean current turbine, which records a "diagram of the parts of the thin-film blade. The thin-film blade 32 is composed of a blade fixing shaft 321, a fixing frame 322 and a thin-film material 323. The blade fixing shaft 321 is installed on the end plate 31 of the ocean current turbine and is connected to the fixing frame 322. The rectangular thin-film material 323 is installed in the fixing frame 322, and the installation method is three-side installation. One side of the rectangle is a free side, which can swing inward or outward under the action of the ocean current. When the ocean current acts When used on the ocean current turbine 3 based on membrane blades, the free end of the membrane blade 32 on the windward side will first be swung toward the center of the circle. At this time, a part of the ocean current that will pass through the resistance surface of the ocean current turbine 3 based on the membrane blade can be guided to the power surface, so that the ocean current turbine 3 based on the membrane blade obtains a larger power moment and improves its efficiency. At the same time, the free end of the membrane blade 32 on the leeward side will swing toward the circumferential side, and obtain a positive torque again, thereby further improving the efficiency of the ocean current turbine 3 based on the membrane blade. In the above technical solution, the installation method of the membrane material is three-sided installation, and one side of the rectangle is a free side. However, when the ocean current flows from one side of the membrane blade to the other side, the ocean current acts on the membrane material on both sides of the blade fixing shaft at the same time. Although one side of the rectangle is a free edge, it can change the direction of part of the ocean current, but there is still a part of the ocean current that will act on the membrane material on both sides of the blade fixing shaft to generate sea thrust, such as Figure 1 As shown, the rotation efficiency of the shaft to which the blades are fixed is reduced. Summary of the invention

[0005] The purpose of the present invention is to provide a windmill suitable for wind power or tides, in order to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a windmill, including a mounting frame and a rotating frame rotatably mounted in the mounting frame, a film is fixedly mounted on the rotating frame, one side of the film is fixedly connected to the rotating frame, and the other three sides of the film are free sides. When an external force passes through the rotating frame, the film located on one side of the central axis of the rotating frame adheres to the rotating frame to generate thrust to push the rotating frame to rotate in the mounting frame, while the film located on the other side of the central axis of the rotating frame is separated from the rotating frame.

[0007] Compared with the prior art, since the film of the present invention is installed on the rotating frame in such a way that one side of the film is fixedly connected to the rotating frame, and the other three sides of the film are free sides, when the direction of the ocean current or the direction of the wind moves from one side of the rotating frame to the other side, the film located on one side of the central axis of the rotating frame is attached to the rotating frame to generate thrust to drive the rotating frame to rotate in the mounting frame, while the film located on the other side of the central axis of the rotating frame is separated from the rotating frame, and the ocean current or wind can only act on the film on one side of the rotating frame, while the ocean current or wind on the other side of the rotating frame can smoothly pass through the other side of the rotating frame. Thus, only one thrust can be generated on the rotating frame. Therefore, the rotation speed efficiency of the rotating frame of the present invention is higher under the action of the same external force. In other words, the energy conversion efficiency is higher.

[0008] As a further improvement of the windmill described in the present invention, the rotating frame includes a connector rotatably installed in the mounting frame, and at least three brackets with the same structure are arranged in a circle on the outer circumference of the connector; each of the frames is provided with at least one notch, and when the external force passes through the rotating frame, the film located on one side of the central axis of the rotating frame is adhered to the frame and covers the notch, while the film located on the other side of the central axis of the rotating frame is separated from the bracket, and the corresponding notch on the bracket is in a unobstructed state.

[0009] As a further improvement of the windmill described in the present invention, the bracket includes at least two branches fixedly mounted on the connecting body, the notch is arranged between two adjacent branches, and a mounting clamp is fixedly mounted on the end of the branch away from the connecting body, and one side of the film is fixed on the mounting clamp; the other three sides of the film are free ends and extend toward the connecting body.

[0010] As a further improvement of the windmill described in the present invention, the branch rod includes a connecting plate fixedly connected to the connecting body, a baffle rod is provided on the connecting plate, a fixing plate is provided at the end of the baffle rod, and the fixing plate and the connecting plate are set at an angle R; the mounting frame is fixedly installed on the fixing plate.

[0011] As a further improvement of the windmill described in the present invention, the bracket includes a transition rod arranged parallel to the axis of the connecting body, and mounting clamps and branch rods are arranged on both sides of the transition rod opposite to each other. The mounting clamp is adjacent to the connecting body, and one side of the film is fixed on the mounting clamp; the other three sides of the film are free edges and extend away from the connecting body.

[0012] As a further improvement of the windmill described in the present invention, the branch rod includes a stabilizing rod arranged parallel to the transition rod, at least two blocking rods are arranged between the stabilizing rod and the transition rod, and a gap is arranged between two adjacent blocking rods; one end of the blocking rod is arranged with the stabilizing rod, and the other end of the blocking rod is arranged with a connecting plate, and the connecting plate is fixedly connected to the transition rod.

[0013] As a further improvement of the windmill described in the present invention, the bracket includes at least two blocking rods integrally formed with the connecting body, the notch is arranged between two adjacent blocking rods, a stabilizing rod parallel to the axis of the connecting body is arranged on the end of the blocking rod away from the connecting body, at least one mounting clip is installed on the blocking rod, one side of the film is fixed on the mounting clip; the other three sides of the film are free edges and extend away from the connecting body.

[0014] As a further improvement of the windmill of the present invention, a baffle plate having the same shape as the baffle rod is fixedly mounted on the bracket, and a plurality of through holes are evenly distributed on the baffle plate.

[0015] As a further improvement of the windmill described in the present invention, the mounting clamp includes two mounting plates with the same structure, a gap is set between the two mounting plates, one side of the film is fixed in the gap and then fixed by a fastener, and the other three sides of the film are free edges and extend toward the direction of the barrier rod.

[0016] The present invention also provides a generator set, comprising the above-mentioned windmill and a generator; the input end of the generator is fixedly connected to the rotating shaft in the windmill.

[0017] In addition to the technical problems solved by the present invention, the technical features that constitute the technical solution, and the advantages brought by the technical features of the technical solution described above, other technical problems that can be solved by the present invention, other technical features included in the technical solution, and the advantages brought by these technical features will be further described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of thrust generated by flow or wind in the prior art.

[0019] Figure 2 It is a three-dimensional explosion schematic diagram of the present invention.

[0020] Figure 3 It is a schematic diagram of the thrust of the ocean current or wind of the present invention.

[0021] Figure 4It is a schematic diagram of the second embodiment of the present invention.

[0022] Figure 5 It is a schematic diagram of embodiment 3 of the present invention.

[0023] Figure 6 Schematic diagram of the fourth embodiment of the present invention.

[0024] Explanation of the accompanying drawings: 01. Upper shelf, 02. Lower shelf, 03. Support rod, 04. Fixed seat, 05. Connecting rod, 06. Connecting body, 07. Film, 08. First bracket, 09. Second bracket, 10. Third bracket, 11. Fourth bracket, 12. Fifth bracket, 13. Branch rod, 14. Notch, 15. Connecting plate, 16. Baffle rod, 17. Mounting plate, 18. Fixed plate, 19. Slot, 20. Rotating shaft, 21. Connecting seat, 22. Auxiliary rod, 23. Transition rod, 24. Stabilizing rod, 25. Baffle plate, 26. Through hole, 27. Transition plate, 28. Mounting clamp. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] For example, see Figure 2-3 As shown, the present invention relates to a windmill, including a mounting frame and a rotating frame arranged in the mounting frame, the mounting frame has two upper frames 01 and lower frames 02 of the same structure, the upper frames 01 and lower frames 02 are fixedly connected by a support rod 03, and a fixing seat 04 is provided on both the upper frame 01 and the lower frame 02, and four connecting rods 05 are integrally formed on the outer circumference of the fixing seat 04, or two or more connecting rods 05 can be integrally formed on the fixing seat 04, which is not limited here. The support rod 03 is fixedly connected to the end of the connecting rod 05. Through the design of the support rod 03 and the connecting rod 05, the mounting frame is hollowed out as a whole.

[0027] See also Figure 2 As shown, the rotating frame includes a connector 06 rotatably mounted in the mounting frame, and at least three brackets with the same structure are arranged in a circle on the outer circumference of the connector 06. In the present invention, five brackets are fixedly mounted on the connector 06, and the brackets include at least two branches 13 fixedly mounted on the connector 06, and a gap 14 is provided between two adjacent branches 13, and the two branches 13 are arranged along the axis direction of the connector 06. A mounting clamp 28 is fixedly mounted on the end of the branch 13, and a flexible film 07 is fixedly mounted on the mounting clamp 28. The film 07 is made of glass fiber, chemical fiber, plastic, plastic resin and other materials. One side of the film 07 is fixedly connected to the mounting frame. The other three sides of the film 07 are free ends and extend toward the connector 06.

[0028] For the sake of clarity, the five brackets are respectively the first bracket 08, the second bracket 09, the third bracket 10, the fourth bracket 11, and the fifth bracket 12. Since five brackets are provided, the first bracket 08 and the connector 06 are on the same plane, the second bracket 09 and the third bracket 10 are located on one side of the connector 06, and the fourth bracket 11 and the fifth bracket 12 are located on the other side of the connector 06.

[0029] When the external force pushes from the top to the bottom, the external force described here is generated by wind or tide. The film 07 on the first bracket 08 is in a vertical downward state. The films 07 on the second bracket 09 and the third bracket 10 are located between the force and the branch rod 13. The film 07 is located between the force and the branch rod 13. As a result, the film 07 on the second bracket 09 is completely attached to the branch rod 13 on the second bracket 09, and the film 07 will close the gap 14 on the second bracket 09. The external force acts on the film 07, thereby generating a downward thrust (F1) on the second bracket 09. A portion of the film 07 on the third bracket 10 is attached to the branch rod 13, and a downward thrust (F1) is also formed on the third bracket 10. The film 07 and the force on the fourth bracket 11 and the fifth bracket 12 are located on both sides of the branch rod 13. As a result, the film 07 on the fourth bracket 11 and the fifth bracket 12 is completely separated from the branch rod 13, so that the gap 14 on the fourth bracket 11 and the fifth bracket 12 is in a state. Therefore, the force passes through the gaps 14 on the fourth bracket 11 and the fifth bracket 12, thereby preventing the external force from acting on the fourth bracket 11 and the fifth bracket 12 to generate thrust (F2). During the rotation process of the entire rotating frame, only the bracket on one side of the connecting body 06 can generate thrust, and the bracket on the other side of the connecting body 06 cannot generate thrust.

[0030] Therefore, the film 07 on the bracket (second bracket 09, third bracket 10) located on one side of the connector 06 is attached to the branch 13 of the external bracket under the action of the external force. The film 07 on the bracket (fourth bracket 11, fifth bracket 12) located on the other side of the connector 06 is completely separated from the bracket (fourth bracket 11, fifth bracket 12) under the action of the external force, so that the external force cannot act on the film 07 on the fourth bracket 11 and the fifth bracket 12 to generate thrust (F2). Therefore, during the rotation of the rotating frame, the bracket located on one side of the connector 06 is driven by the external force to rotate the rotating frame as a whole, while the bracket located on the other side of the connector 06 will not be affected by the external force, thereby avoiding the assistance generated by the external force during the rotation of the rotating frame. Compared with the prior art, the rotating frame of the present invention rotates faster under the same external force. In other words, the energy conversion efficiency is higher.

[0031] The branch rod 13 includes a connecting plate 15 fixedly connected to the connecting body 06, and the connecting plate 15 and the connecting body 06 are fixedly connected by fasteners, welding or integral molding. A baffle 16 is integrally formed on the connecting plate 15, and the shape of the baffle 16 includes but is not limited to any one of an arc shape, a straight line shape, and a wavy line. When the film 07 is attached to the baffle 16, the contact area of ​​the film 07 with the external force is increased. Thereby, the external force acts on the rotating frame to a greater extent. A fixed plate 18 is integrally formed at the end of the baffle 16, and the fixed plate 18 is set at an angle R with the connecting plate 15. The angle R is set at 0-90°. Different installation angles are selected according to different applicable scenarios. The mounting frame is fixedly mounted on the fixed plate 18.

[0032] The mounting clamp 28 includes two mounting plates 17 of the same structure fixedly connected by fasteners, a gap is set between the two mounting plates 17, one side of the film 07 is fixedly installed in the gap and then fixed by fasteners, and the other three sides of the film 07 are free sides and extend in the direction of the blocking rod 16. When the film 07 is in a normal state, it is located between the mounting frame and the connector 06. When the film 07 is subjected to external force, it can fit on the blocking rod 16. The mounting plate 17 fixedly connected to the fixing plate 18 is provided with a card slot 19 of the same width as the fixing plate 18. The card slot 19 is provided to fix the mounting frame and also to limit the position.

[0033] The connector 06 includes a rotating shaft 20 and a plurality of connecting seats 21 fixedly mounted on the rotating shaft 20. A transition plate 27 is integrally formed on the outer circumference of the connecting seat 21, and the connecting plate 15 is fixedly connected to the transition plate 27. The connector 06 is composed of a plurality of connecting seats 21, mainly to reduce the weight of the connector 06, thereby reducing the weight on the rotating shaft 20. This allows the entire rotating frame to rotate when subjected to a relatively small thrust. A mounting hole is provided on the fixed seat 04 of the mounting frame, and a bearing is fixedly mounted in the mounting hole. The two ends of the rotating shaft 20 are fixedly connected to the bearings in the mounting hole, and the rotating shaft 20 rotates in the mounting frame.

[0034] An auxiliary rod 22 is also provided in the bracket, and the auxiliary rod 22 is located between two adjacent branch rods 13, and the above-mentioned gap 14 is formed between the auxiliary rod 22 and the branch rod 13. The auxiliary rod 22 includes an auxiliary plate fixedly mounted on the mounting frame, and the auxiliary plate is integrally formed with the auxiliary rod 22 having the same structure as the blocking rod 16, and the end of the auxiliary rod 22 extends toward the direction of the rotating shaft 20 of the connecting body 06 and is a free end. The auxiliary rod 22 is provided to prevent the film 07 from being deformed when subjected to external force.

[0035] When the present invention is in use, when the external force moves from one side of the mounting frame to the other side of the mounting frame, the external force is wind force or tidal force. Since one side of the film 07 is fixedly connected to the rotating frame, and the other three sides of the film 07 are free sides, when the external force passes through the rotating frame, the film 07 located on one side of the central axis of the rotating frame is attached to the rotating frame, so the external force acts on the film 07, generating a thrust to push the rotating frame to rotate in the mounting frame, so that the rotating frame rotates on the mounting frame. The film 07 located on the other side of the central axis of the rotating frame is separated from the rotating frame. The external force directly passes through one side of the rotating frame.

[0036] The present invention also provides a generator set, including the above-mentioned windmill and generator, the input end of the generator is fixedly connected to the rotating shaft 20 in the above-mentioned windmill. This generator set can generate electricity using wind power and tides. When the wind blows from one side of the windmill to the other side. Since the film 07 located on one side of the central axis of the rotating frame is attached to the rotating frame under the action of the wind, the wind acts on the film 07, generating thrust to drive the rotating frame to rotate in the mounting frame, so that the rotating frame rotates on the mounting frame. Thereby driving the generator to rotate to generate electricity, and the film 07 located on the other side of the central axis of the rotating frame is separated from the rotating frame under the action of the wind. The wind directly passes through one side of the rotating frame and will not reduce the rotation speed of the rotating frame.

[0037] For example 2, please refer to Figure 4 As shown, the difference between this embodiment and the first embodiment is that the bracket includes a transition rod 23 integrally formed with the connector 06, and the transition rod 23 is arranged parallel to the axis of the connector 06. A mounting clamp 28 is arranged on one side of the transition rod 23. The mounting clamp 28 is adjacent to the connector 06, and a branch rod 13 is arranged on the other side of the transition rod 23. The mounting clamp 28, the transition rod 23 and the branch rod 13 are fixedly connected by fasteners, and one side of the film is fixedly mounted on the mounting clamp 28, and the other three sides of the film 07 are free sides and extend away from the connector 06. When the connector 06 rotates, the branch rod 13 is driven to rotate together.

[0038] The branch rod 13 includes a stabilizing rod 24 arranged parallel to the transition rod 23, at least two blocking rods 16 are arranged between the stabilizing rod 24 and the transition rod 23, and a gap is arranged between two adjacent blocking rods 16. The shape of the blocking rod 16 includes but is not limited to any one of an arc shape, a straight line shape, and a wavy line. One end of the blocking rod 16 is integrally formed with the stabilizing rod 24, and the other end of the blocking rod 16 is integrally formed with a connecting plate 15, and the connecting plate 15 is fixedly connected to the transition rod 23 by a fastener.

[0039] For example 3, please refer to Figure 5As shown, the difference between this embodiment and the above-mentioned embodiment 1 and embodiment 2 is that the bracket includes at least two baffle rods 16 integrally formed with the connector 06, and a gap is provided between two adjacent baffle rods 16. The shape of the baffle rod 16 includes but is not limited to any one of an arc shape, a straight line shape, and a wavy line. When the film 07 is attached to the baffle rod 16, the contact area of ​​the film 07 with the external force is increased. Thereby, the external force acts on the rotating frame to a greater extent. A stabilizing rod 24 is integrally formed at one end of the baffle rod 16, and the stabilizing rod 24 is arranged parallel to the axis of the connector 06. Each baffle rod 16 is integrally formed with the stabilizing rod 24. At least one mounting clip 28 is installed on the baffle rod 16, and the mounting position of the mounting clip 28 on the baffle rod 16 is selected according to actual conditions. It is not limited here. The film 07 is fixedly mounted on the mounting clip 28.

[0040] Example 4, please refer to Figure 6 As shown, the difference between this embodiment and the above-mentioned embodiments 1, 2 and 3 is that a baffle plate 25 with the same shape as the baffle rod 16 is fixedly mounted on the bracket, and a plurality of through holes 26 are evenly distributed on the baffle plate 25. The baffle plate 25 is arranged to prevent the film 07 from being deformed when subjected to external force.

[0041] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0043] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A windmill, characterized in that: It includes a mounting frame and a rotating frame rotatably mounted in the mounting frame, a film is fixedly mounted on the rotating frame, one side of the film is fixedly connected to the rotating frame, and the other three sides of the film are free sides. When an external force passes through the rotating frame, the film located on one side of the central axis of the rotating frame adheres to the rotating frame to generate thrust to push the rotating frame to rotate in the mounting frame, while the film located on the other side of the central axis of the rotating frame is separated from the rotating frame.

2. The windmill according to claim 1, characterized in that: The rotating frame includes a connecting body rotatably mounted in the mounting frame, and at least three brackets with the same structure are arranged in a circle on the outer circumference of the connecting body; each of the brackets is provided with at least one notch, and when an external force passes through the rotating frame, the film located on one side of the central axis of the rotating frame is attached to the frame and covers the notch, while the film located on the other side of the central axis of the rotating frame is separated from the bracket, and the corresponding notch on the bracket is in a smooth state.

3. The windmill according to claim 2, characterized in that: The bracket includes at least two branches fixedly mounted on the connector, the notch is arranged between two adjacent branches, the end of the branch away from the connector is fixedly mounted with a mounting clamp, one side of the film is fixed on the mounting clamp; the other three sides of the film are free ends and extend toward the connector.

4. The windmill according to claim 3, characterized in that: The branch rod comprises a connecting plate fixedly connected to the connecting body, a baffle rod is arranged on the connecting plate, a fixing plate is arranged at the end of the baffle rod, and the fixing plate and the connecting plate are arranged at an angle R; the mounting frame is fixedly mounted on the fixing plate.

5. The windmill according to claim 2, characterized in that: The bracket includes a transition rod arranged parallel to the axis of the connector, with mounting clamps and branch rods arranged opposite to each other on both sides of the transition rod. The mounting clamp is adjacent to the connector, and one side of the film is fixed on the mounting clamp; the other three sides of the film are free edges and extend away from the connector.

6. The windmill according to claim 5, characterized in that: The branch rod includes a stabilizing rod arranged parallel to the transition rod, at least two blocking rods are arranged between the stabilizing rod and the transition rod, and a gap is arranged between two adjacent blocking rods; one end of the blocking rod is arranged with the stabilizing rod, and the other end of the blocking rod is arranged with a connecting plate, which is fixedly connected to the transition rod.

7. The windmill according to claim 2, characterized in that: The bracket includes at least two baffle rods integrally formed with the connector, the notch is arranged between two adjacent baffle rods, a stabilizing rod parallel to the axis of the connector is arranged on the end of the baffle rod away from the connector, at least one mounting clip is installed on the baffle rod, one side of the film is fixed on the mounting clip; the other three sides of the film are free edges and extend away from the connector.

8. The windmill according to any one of claims 4 to 7, characterized in that: A baffle plate with the same shape as the baffle rod is fixedly mounted on the bracket, and a plurality of through holes are evenly distributed on the baffle plate.

9. The windmill according to claim 8, characterized in that: The mounting clamp comprises two mounting plates of the same structure, a gap is arranged between the two mounting plates, one side of the film is fixedly mounted in the gap and then fixed by a fastener, and the other three sides of the film are free sides and extend in the direction of the blocking rod.

10. A generator set, characterized in that: It comprises the windmill and generator as described in any one of claims 1 to 9; the input end of the generator is fixedly connected to the rotating shaft in the windmill.

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