[0018] figure 1 The invention shows a blade with an elliptical rotation displacement hole. In the figure, the appropriate selection of the size of the long and short axis of the ellipse will directly affect the running function of the blades and even the performance of the entire windmill. Properly increasing the length of the minor axis of the ellipse can make the blades run more softly. If the length and minor axis of the ellipse are the same, it will become a circle. In order to prevent the axial movement between the blade and the blade rotation axis, a groove can be used on the circumference of the ellipse, but a cam must be added to the position of the blade rotation axis corresponding to the groove.
[0019] figure 2 It is a flat blade with an elliptical rotation displacement hole of the present invention. Flat blades are advantageous when the wind blades are in an upwind state.
[0020] image 3 It is the blade of the present invention with a rectangular rotation displacement hole. Adding a baffle beside the displacement hole can limit the axial movement between the blade and the blade rotation axis. The operation is similar Figure 4 , See Figure 4.
[0021] Figure 4 It is a wind power generation device with elliptical rotation and displacement hole blades of the present invention.
[0022] The windmill shown includes a blade 1, an elliptical rotation displacement hole 2, a blade rotation shaft 4, a blade frame wheel 5, a gear lever 6, a wind direction rudder rotating ring 7, a wind direction rudder 8, and a blade revolution axis 9.
[0023] The blade revolving shaft 9 is arranged in the center of the blade frame wheel 5 and is fixedly connected with the blade frame wheel 5; four blades 1 (or two blades, three Blades or others); the end surfaces at both ends of the blade 1 are provided with elliptical rotation displacement holes 2, and the blade 1 is sleeved in the blade rotation shaft 4 through the elliptical rotation displacement holes 2; The rotation shaft 4 is fixedly connected to the blade frame wheel 5; the gear lever 6 is fixedly connected to the blade frame wheel 5; the “revolution axis” formed by the blade frame wheel around the blade revolution axis (the dotted line in the figure is Show) rotation.
[0024] This embodiment will be further described in detail with reference to the accompanying drawings and specific implementations: see figure 1 with Figure 4 , figure 1 As shown, the blade 1 has an elliptical rotation displacement hole 2. Figure 4 It shows that the elliptical rotation displacement hole is sleeved in the blade rotation shaft 4. In this sleeve, the movement of the blade 1 is very flexible. When the blade 1 moves down to the lower end position with the blade frame wheel 5, the blade is in an upwind state. Due to the action of gravity, the blade 1 sags, and one end of the long axis of the elliptical rotation displacement hole is hung on the blade rotation axis 4, forming the upper and lower parts of different areas. Under the action of the wind, the blade tends to run horizontally, reducing The resistance of the wind. The rotation of the blade frame wheel 5 drives the blade 1 to move on the gear lever 6 to gradually approach the blade 1, and finally the blade 1 relies on the support of the gear lever 6 to work against the wind above the blade frame wheel 5 and drives the blade frame wheel 5 to rotate. When the blade 1 runs to a horizontal state, the other end of the long axis of the elliptical rotation displacement hole rests on the blade rotation axis 4 under the action of wind and centrifugal force of circular motion. Repeat the previous process to make the windmill run continuously. The operation of the blades is like a hula hoop moving up and down. It should be clear that such a wind power generation device needs to be equipped with a yaw system device, that is, the role of the combination of the wind direction rudder rotating ring 7 and the wind direction rudder 8 in this embodiment.
[0025] This embodiment is more complicated when the blade frame wheel 5 is running in a horizontal state, and will not be introduced. For details, please refer to another application case "a combined windmill".
[0026] use image 3 The technology in which the end faces of the two ends of the blade are provided with rectangular rotation displacement holes has a relatively complicated structure, and a sliding connection method or a rotation shaft bearing can be used. Correspondingly, the stability of the blade operation is increased, and the production cost is increased if the rotation shaft bearing is used.
[0027] The principle of the elliptical rotation and displacement groove is the same as that of the ellipse rotation and displacement hole. Therefore, you can refer to the implementation, as long as the blade rotation axis 4 is fitted in the elliptical rotation displacement groove, the difference is that the "blade rotation axis" is two relatively elliptical "central axes" instead of the previously introduced "blade rotation axis" and The center lines of the blade rotation shaft 4 overlap. The blade rotation shaft is fixedly connected with the blade, and the blade is divided into two parts with different areas. The depth of the elliptical rotation displacement groove will affect the axial movement of the blade rotation axis. The technology of adopting the elliptical rotation displacement groove requires the blade frame wheel 5 to be particularly strong, otherwise the rotation performance of the windmill will be greatly affected. If the blade rotation shaft 4 is disconnected and installed, the blade can be set thinner.
[0028] Finally, we will focus on the "blade rotation axis". It should be said that the "blade rotation axis" is a virtual concept, which varies with whether the blade rotation axis is fixed or moving with the blade frame wheel. When the blade rotation axis is fixed relative to the blade frame wheel, the "blade rotation axis" overlaps the centerline of the blade rotation axis, such as figure 1 , figure 2 , image 3 Example produced. When the blade rotation axis moves with the blade at the same time relative to the blade frame wheel, the "blade rotation axis" is the "central axis" of their common motion track. For example, "the inner surface of the blade frame wheel opposite to the outer end is provided with an elliptical rotation rotation. This is the case with the embodiment of "shift groove".
[0029] Finally, the concept of "relative displacement" is clarified. The so-called "relative displacement" refers to the displacement between the central axis of the blade itself and the "rotation axis of the blade" during movement.
