Propeller type anemograph

Abstract

The invention discloses a propeller type anemograph, and relates to the field of anemographs, the propeller type anemograph comprises a machine body and a machine cover, a machine body shaft is rotatably connected in the machine body, a machine cover shaft coaxial with the machine body shaft is fixedly connected in the machine cover, the machine body shaft and the machine cover shaft are connected through a flexible coupling body, a rotating plate is rotatably connected in the machine body, and the rotating plate is fixedly connected in the machine body. A hollow column is fixedly connected to the rotating plate in the direction facing the machine cover shaft, the machine cover shaft can make contact with the inner wall of the hollow column after the flexible coupling body is bent, a hammering structure driven by the rotating plate is installed in the machine body in the direction facing the machine cover, and the machine cover can vibrate when hammered by the hammering structure. After the dead weight of the propeller on the machine cover is increased due to the damage of freezing rain, the rotating shaft of the machine cover can make contact with the rotating disc to make the rotating disc rotate synchronously when the machine cover rotates, the hammering structure in the machine body makes reciprocating motion to strike the machine cover in the rotating process of the rotating disc, and the influence of the freezing rain on the working stability of the propeller type anemometer is effectively reduced.

Description

Technical Field

[0001] The invention relates to the field of anemometers, in particular to a propeller type anemometer. Background Art

[0002] An anemometer is an instrument for measuring air velocity, and there are cup type, propeller type, hot wire type and digital type. A propeller anemometer is an anemometer with a set of three-blade or four-blade propellers rotating around a horizontal axis. The propeller is installed in front of a weather vane so that its rotating plane is always facing the direction of the wind, and its rotation speed is proportional to the wind speed.

[0003] A Chinese patent with related announcement number CN107015019B discloses a propeller anemometer, including a propeller, a rotor, and a main body. The rotor is located at the head of the main body and can rotate driven by the propeller. The propeller anemometer also includes an antifreeze cover, which is located around the outer side of the rotor, and the gap between the rotor and the main body is located in the antifreeze cover.

[0004] In view of the above-mentioned related technologies, the existing propeller-type anemometer uses an antifreeze cover to reduce the influence of freezing rain on the connection between the rotor and the main body. However, in freezing rain weather with no wind or light wind, the propeller generally does not continue to rotate. The freezing rain falling on the propeller slides downward under its own gravity and gradually freezes in the process of sliding downward, which easily increases the deadweight of the blades of the lowest propeller, affects the dynamic balance of the propeller, easily reduces the stability of the anemometer, and increases the measurement errors of wind direction and wind speed. In addition, when freezing rain falls on the main body of the existing propeller-type anemometer, the freezing rain may flow along the curved outer wall of the main body to the connection between the main body and the rotating shaft of the rotor, or the freezing rain may directly freeze between the outer wall of the main body and the antifreeze cover. In summary, the existing propeller-type anemometer is easily affected by freezing rain weather, resulting in unstable working state. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a propeller anemometer to solve the technical problem that the existing propeller anemometer is easily affected by freezing rain weather, resulting in an unstable working state.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a propeller anemometer, comprising a body and a cover, a body axis rotatably connected within the body, a cover axis coaxial with the body axis fixedly connected within the cover, the body axis and the cover axis are connected via a flexible coupling, a rotating plate rotatably connected within the body, a hollow column fixedly connected to the rotating plate toward the cover axis, the cover axis can contact the inner wall of the hollow column after the flexible coupling is bent, a hammer structure driven by the rotating plate is installed within the body toward the cover, and the cover can vibrate when hammered by the hammer structure.

[0007] By adopting the above technical solution, after the propeller on the machine cover is damaged by freezing rain and its own weight increases, the machine cover's own rotating shaft will contact the rotating disk to make the rotating disk rotate synchronously when it rotates. During the rotation of the rotating disk, the hammer structure in the body will reciprocate and hit the machine cover, which is conducive to the ice on the machine cover falling off due to vibration during rotation, and then the propeller can quickly return to a stable rotation state, effectively reducing the impact of freezing rain on the working stability of the propeller anemometer.

[0008] The present invention is further configured as follows: a fixed plate is fixedly connected to the machine body on the side of the rotating plate close to the machine cover, a plurality of telescopic columns are slidably connected to the fixed plate at an annular interval, the axis of the telescopic columns is parallel to the axis of the machine body axis, at least one arc-shaped table is fixedly connected to the side of the rotating plate facing the fixed plate, one end of the telescopic column is in contact with the machine cover, and the other end is fixedly connected to a fixing plate with a diameter larger than the telescopic column, a spring is arranged between the end of the telescopic column facing the machine cover and the fixed plate, a scraper blade cooperating with the fixing plate is fixedly connected to the edge of the arc-shaped table, and the scraper blade is used to make the telescopic column slide toward the rotating plate and compress the spring when the rotating plate rotates.

[0009] By adopting the above technical solution, the engine cover is continuously struck and vibrates, thereby causing frozen ice on the engine cover and the propeller blades to be shaken off, allowing the propeller to quickly restore dynamic balance.

[0010] The present invention is further configured such that the head end of the scraper blade is closer to the machine cover than the tail end of the scraper blade along the axial direction of the telescopic column, a through hole for the hollow column to pass through is provided at the center of the fixed plate, and the hollow column is rotatably connected relative to the fixed plate.

[0011] By adopting the above technical solution, the scraper blade can make the telescopic column slide away from the machine cover after contacting the fixing plate.

[0012] The present invention is further configured such that a shielding ring for shielding the gap between the machine body and the machine cover is fixedly connected to the edge of the machine cover toward the machine body, and a water blocking platform is fixedly connected to the edge of the end of the machine body within the shielding range of the shielding ring, and the water blocking platform is inclined toward the direction away from the machine cover.

[0013] By adopting the above technical solution, the shielding ring can shield the gap between the machine body and the machine cover, and the water blocking platform can effectively prevent water flowing along the curved surface of the outer wall of the machine body from flowing into the gap between the machine body and the machine cover.

[0014] The present invention is further configured such that a heating ring is fixedly connected to the water blocking platform, and the heating ring is also within the shielding range of the shielding ring.

[0015] By adopting the above technical solution, the heating ring can heat the space between the shielding ring and the water blocking platform, effectively preventing freezing rain from falling on the outer wall of the body and flowing into the gap between the shielding ring and the outer wall of the body, thereby preventing ice from forming in the gap between the body and the edge of the shielding ring.

[0016] The present invention is further configured such that a driving motor for driving the body shaft to rotate is installed in the body, and the tail end of the body is rotatably connected to a lower tail wing.

[0017] By adopting the above technical solution, after rotating and adjusting the lower tail wing, by reading the wind direction change state of the anemometer, it is possible to determine whether the environment around the anemometer is windy, but the wind force is not enough to make the propeller start to rotate after ice formation, so as to start the drive motor in time to assist the rotation of the hood.

[0018] The present invention is further configured such that a tail wing groove for clamping the lower tail wing is provided on the bottom surface of the body, and a magnetic attraction structure for fixing the end of the lower tail wing is provided in the tail wing groove.

[0019] By adopting the above technical solution, the tail wing groove can play a role in assisting in fixing the end of the lower tail wing, and at the same time has a positioning effect on the lower tail wing.

[0020] The present invention is further configured such that the hollow column is coaxial with the cover shaft and has an inner diameter greater than the diameter of the cover shaft, and when the cover rotates and is in dynamic balance, the cover shaft does not contact the hollow column.

[0021] By adopting the above technical solution, the cover shaft is prevented from contacting with the hollow column during normal rotation of the cover.

[0022] The present invention is further configured such that the outer wall of the cover shaft and the inner wall of the end of the hollow column are both provided with anti-slip structures that cooperate with each other.

[0023] By adopting the above technical solution, the cover shaft can drive the hollow column to rotate more stably.

[0024] The present invention is further configured such that the inner diameter of the hollow column is larger than the body shaft, the flexible coupling body and the cover shaft, and the diameter of the flexible coupling body is smaller than the body shaft and the cover shaft.

[0025] By adopting the above technical solution, the flexible coupling body is prevented from contacting the inner wall of the hollow column, and the body shaft and the cover shaft are prevented from contacting the inner wall of the hollow column during normal operation.

[0026] In summary, the present invention mainly has the following beneficial effects: 1. The present invention connects the rotating shaft between the machine body and the machine cover through a flexible coupling. When the propeller on the machine cover is damaged by freezing rain and its own weight increases, the rotating shaft of the machine cover will contact the rotating disk when the machine cover rotates, so that the rotating disk rotates synchronously. During the rotation of the rotating disk, the hammer structure in the machine body reciprocates and hits the machine cover, which is conducive to the ice on the machine cover falling off due to vibration during the rotation process, and then the propeller quickly returns to a stable rotation state, effectively reducing the influence of freezing rain on the working stability of the propeller anemometer; 2. The present invention connects the rotating shaft between the machine body and the machine cover through a flexible coupling. When the propeller on the machine cover is not in a weight imbalance condition, the rotating shaft of the machine cover will not contact the rotating disk, thereby preventing the hammering structure in the machine body from hammering the machine cover when the propeller is working normally, effectively extending the service life of the propeller anemometer; 3. The present invention effectively prevents freezing rain from flowing along the outer wall of the body to the connection between the body and the cover by fixing a shielding ring at the connection between the cover and the body, fixing a water blocking platform at the outer edge of the body in the shielding area of ​​the shielding ring, and fixing a heating ring on the water blocking platform, thereby further preventing freezing rain from freezing between the shielding ring and the outer wall of the body when the heating ring is working; 4. The present invention connects the lower tail wing to the rear end of the machine body and connects the drive motor to the rear end of the rotating shaft of the machine body. When it senses that the machine cover is not rotating, it can determine whether it is in a windless or light wind state by rotating and adjusting the lower tail wing and reading the wind direction data of the anemometer. When the external environment has enough airflow to rotate the propeller but the propeller is not rotating, the drive motor is used to assist the machine cover to start rotating, thereby avoiding the situation that the propeller blades are too heavy to be rotated by the natural wind due to the accumulated freezing rain. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional diagram of the first embodiment of the present invention; Figure 2 It is an exploded view of the first embodiment of the present invention; Figure 3 For the present invention Figure 2 A magnified view of middle; Figure 4 It is an exploded view from another perspective of the first embodiment of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of middle B; Figure 6 It is a three-dimensional diagram of the internal structure of the first embodiment of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of middle C; Figure 8 It is a stereogram of the second embodiment of the present invention; Fig. 9This is a three-dimensional diagram of the internal structure of the second embodiment of the present invention; Fig.10 For the present invention Fig. 9 Enlarged view of middle D; Fig.11 This is a three-dimensional diagram of embodiment 3 of the present invention; Fig.12 This is a three-dimensional diagram of the lower tail wing in the adjustment state of the third embodiment of the present invention; Fig.13 This is a stereoscopic diagram of the tail wing adjustment state from another viewing angle of the third embodiment of the present invention.

[0028] In the figure: 1, fuselage; 101, rotating groove; 102, tail wing groove; 2, machine cover; 3, fuselage shaft; 4, flexible coupling body; 5, machine cover shaft; 6, rotating plate; 601, hollow column; 602, arc-shaped platform; 603, scraper; 7, fixed plate; 8, telescopic column; 801, fixed plate; 9, shielding ring; 10, water blocking platform; 11, heating ring; 12, lower tail wing; 13, upper tail wing; 14, base. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] The following describes an embodiment of the present invention based on its overall structure.

[0031] Embodiment 1 A propeller anemometer, such as Figure 1-13As shown, it includes a body 1 and a cover 2, the body 1 is rotatably connected to the base 14, a rotation angle sensor is installed between the body 1 and the base 14, a body shaft 3 is rotatably connected inside the body 1, and a sensor for monitoring the rotation speed of the body shaft 3 is installed inside the body 1. The present application does not make any improvements to the rotation angle sensor and the rotation speed sensor of the body shaft 3, and its working principle is not repeated here. The tail end of the body 1 is also fixedly connected to an upper tail 13, and a cover shaft 5 coaxial with the body shaft 3 is fixedly connected inside the cover 2. A propeller is fixedly connected to the outer wall of the cover 2, and the body shaft 3 and the cover shaft 5 are connected by a flexible coupling 4, and the connection method can be bonding , clamping, etc., in the present embodiment, a bonding method is specifically adopted, specifically, the flexible coupling body 4 can be a coupling member such as a rubber column, a spring, etc. that can produce elastic deformation in the axial direction. In the present embodiment, the flexible coupling body 4 specifically adopts a rubber column, and a rotating plate 6 is rotatably connected in the body 1. Specifically, a rotating groove 101 for the rotating plate 6 to rotate is provided in the body 1, and the rotating plate 6 is fixedly connected with a hollow column 601 toward the direction of the cover axis 5. After the flexible coupling body 4 is bent, the cover axis 5 can contact the inner wall of the hollow column 601, and a hammer structure driven by the rotating plate 6 is installed in the body 1 toward the cover 2, and the cover 2 can vibrate when hammered by the hammering structure.

[0032] See also Figure 2-7 , the hollow column 601 is coaxial with the cover shaft 5, and the inner diameter is larger than the diameter of the cover shaft 5. When the cover 2 rotates in dynamic balance, the cover shaft 5 does not contact the hollow column 601, avoiding the cover shaft 5 and the hollow column 601 from contacting during the normal rotation of the cover 2, thereby extending the service life of the cover 2 and the hammer structure in the body 1. The inner diameter of the hollow column 601 is larger than the body shaft 3, the flexible coupling body 4, and the cover shaft 5. The diameter of the flexible coupling body 4 is smaller than the body shaft 3 and the cover shaft 5, avoiding the flexible coupling body 4 from contacting the inner wall of the hollow column 601 when in a deformed state, and at the same time avoiding the body shaft 3 and the cover shaft 5 from contacting the inner wall of the hollow column 601 during normal operation.

[0033] See also Figure 2-7, the machine body 1 is fixedly connected with a fixed plate 7 on the side of the rotating plate 6 close to the machine cover 2, and a plurality of telescopic columns 8 are slidably connected to the fixed plate 7 at annular intervals. Specifically, in the present embodiment, six telescopic columns 8 are slidably connected to the fixed plate 7, and the axis of the telescopic column 8 is parallel to the axis of the machine body axis 3. At least one arc-shaped platform 602 is fixedly connected to the side of the rotating plate 6 facing the fixed plate 7. Specifically, the arc-shaped platform 602 is arc-shaped, and the circle is concentric with the rotating plate 6. In the present embodiment, two arc-shaped platforms 602 are fixedly connected to the rotating plate 6, one end of the telescopic column 8 is in contact with the machine cover 2, and the other end is fixedly connected with a fixing piece 801 having a diameter larger than the telescopic column 8. A spring is arranged between the end of the telescopic column 8 facing the machine cover 2 and the fixed plate 7, and a scraper 603 cooperating with the fixing piece 801 is fixedly connected to the edge of the arc-shaped platform 602. The scraper 603 is used to make the telescopic column 8 slide toward the direction of the rotating plate 6 and compress the spring when the rotating plate 6 rotates.

[0034] The head end of the scraper 603 is closer to the machine cover 2 along the axial direction of the telescopic column 8 than the tail end of the scraper 603. A through hole is set in the center of the fixed plate 7 for the hollow column 601 to pass through. The hollow column 601 is rotatably connected relative to the fixed plate 7, so that the scraper 603 can slide the telescopic column 8 away from the machine cover 2 after contacting the fixed plate 801. The outer wall of the machine cover shaft 5 and the inner wall of the end of the hollow column 601 are both provided with mutually cooperating anti-slip structures, so that the machine cover shaft 5 can more stably drive the hollow column 601 to rotate.

[0035] When the propeller blades on the cover 2 become unevenly weighted due to freezing rain, the heavier blades are located under the cover 2 due to their own gravity, thereby bending the flexible coupling 4, causing the cover shaft 5 to contact the hollow column 601 and drive the rotating plate 6 to rotate. The scraper 603 on the edge of the arc platform 602 moves in a circumferential direction, cyclically contacting each fixed plate 801, causing the telescopic column 8 to slide away from the cover 2 and compress the spring. After the fixed plate 801 is out of contact with the scraper 603, the elastic potential energy of the spring is released, and the telescopic column 8 hits the cover 2 under the push of the spring. When the rotating plate 6 continues to rotate, the cover 2 is continuously hit and vibrates, thereby causing the frozen ice on the cover 2 and the propeller blades to be shaken off, allowing the propeller to quickly restore dynamic balance.

[0036] Embodiment 2 A propeller anemometer, such as Figure 1-13As shown, on the basis of the first embodiment, the difference from the first embodiment is that a shielding ring 9 for shielding the gap between the body 1 and the cover 2 is fixedly connected to the edge of the cover 2 toward the body 1, specifically, the shielding ring 9 extends toward the body 1 and leaves a gap with the outer wall of the body 1, and the edge of the end of the body 1 is fixedly connected with a water blocking platform 10 within the shielding range of the shielding ring 9, and the water blocking platform 10 is inclined in the direction away from the cover 2. After the rainwater on the outer wall of the body 1 slides along the arc surface of the outer wall of the body 1 to the water blocking platform 10, it is blocked by the water blocking platform 10 and cannot continue to flow toward the gap between the body 1 and the cover 2, thereby preventing the freezing rain from flowing to the rotating shaft of the body 1 and the cover 2 to freeze the cover 2, the shielding ring 9 can play a role in shielding the gap between the body 1 and the cover 2, and the water blocking platform 10 can effectively prevent the water flowing along the arc surface of the outer wall of the body 1 from flowing into the gap between the body 1 and the cover 2.

[0037] See also Figure 8-10 A heating ring 11 is fixedly connected to the water blocking platform 10, and the heating ring 11 is also within the shielding range of the shielding ring 9. The heating ring 11 can heat the space between the shielding ring 9 and the water blocking platform 10, effectively preventing freezing rain from falling on the outer wall of the body 1 and flowing into the gap between the shielding ring 9 and the outer wall of the body 1 to form ice, preventing ice from forming at the gap between the body 1 and the edge of the shielding ring 9, and further preventing the body 1 and the cover 2 from being unable to rotate relative to each other due to freezing rain.

[0038] Embodiment 3 A propeller anemometer, such as Figure 1-13 As shown, on the basis of the first embodiment, the difference from the first embodiment is that a driving motor for driving the body shaft 3 to rotate is installed in the body 1, and the tail end of the body 1 is rotatably connected to the lower tail 12. Specifically, a control motor for controlling the rotation of the lower tail 12 is installed in the body 1, and the rotating shaft of the control motor connected to the lower tail 12 is orthogonal to the axis of the body shaft 3. After rotating and adjusting the lower tail 12, by reading the wind direction change state of the anemometer, it can be determined whether the surrounding environment of the anemometer is windy. Specifically, if the external environment is in a windless or light breeze state, no matter how the lower tail 12 is rotated and adjusted, the body 1 will not rotate significantly relative to the base 14, and the external environment has a certain intensity of wind, but the wind force is not enough to make the propeller after ice start to rotate. At this time, when the lower tail 12 is rotated and adjusted, the airflow applies force to the lower tail 12, causing the body 1 to rotate significantly relative to the base 14. At this time, the driving motor can be started to assist the rotation of the cover 2, so as to better remove the ice on the propeller when the weight of ice on the propeller is heavy.

[0039] See also Fig.13The bottom surface of the body 1 is provided with a tail slot 102 for clamping the lower tail 12, and a magnetic attraction structure for fixing the end of the lower tail 12 is provided in the tail slot 102. Specifically, a magnet is fixed in the tail slot 102, and the end of the lower tail 12 away from its own rotation axis is magnetic and can be attracted by the magnet in the tail slot 102. In the process of resetting the lower tail 12 after rotation and adjustment, the magnet in the tail slot 102 is conducive to resetting the lower tail 12. The tail slot 102 can play a role in assisting in fixing the end of the lower tail 12, and at the same time has a positioning effect on the lower tail 12.

[0040] The working principle of the present invention is as follows: after the propeller connected to the cover 2 is damaged by freezing rain and frozen, the heavier blade is rotated to a position below the cover 2 by its own gravity. The subsequent freezing rain will further increase the weight of the blade after sliding down, causing the flexible coupling body 4 to bend and produce elastic deformation. Subsequently, as the propeller rotates, the cover shaft 5 contacts the hollow column 601 and transmits to the hollow column 601, thereby driving the rotating plate 6 to rotate. The arc-shaped table 602 on the rotating plate 6 makes a circular motion. The scraper 603 on the arc-shaped table 602 cyclically scrapes the fixed plate 801 at the tail end of the telescopic column 8, causing the telescopic column 8 to slide away from the cover 2 to compress the spring, and after the scraper 603 is separated from the contact with the fixed plate 801, the spring releases its elastic potential energy, thereby allowing the telescopic column 8 to complete the impact on the cover 2. Each telescopic column 8 cyclically impacts the cover 2, and the vibration generated by the cover 2 causes the ice on the propeller to fall off during the rotation of the propeller, thereby allowing the propeller to quickly return to a stable rotation state, effectively reducing the influence of freezing rain on the working stability of the anemometer.

[0041] Although an embodiment of the present invention has been shown and described, this specific embodiment is only an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A propeller anemometer, comprising a body (1) and a cover (2), wherein the body (1) is rotatably connected to a body axis (3), and the cover (2) is fixedly connected to a cover axis (5) coaxial with the body axis (3), characterized in that: The body shaft (3) and the cover shaft (5) are connected via a flexible coupling (4); a rotating plate (6) is rotatably connected inside the body (1); a hollow column (601) is fixedly connected to the rotating plate (6) in the direction of the cover shaft (5); after the flexible coupling (4) is bent, the cover shaft (5) can contact the inner wall of the hollow column (601); a hammering structure driven by the rotating plate (6) is installed in the body (1) toward the cover (2); and the cover (2) can vibrate when hammered by the hammering structure.

2. The propeller anemometer according to claim 1, characterized in that: The machine body (1) is fixedly connected to a fixed plate (7) on one side of the rotating plate (6) close to the machine cover (2); a plurality of telescopic columns (8) are slidably connected to the fixed plate (7) at annular intervals; the axis of the telescopic column (8) is parallel to the axis of the machine body axis (3); at least one arc-shaped platform (602) is fixedly connected to a side of the rotating plate (6) facing the fixed plate (7); one end of the telescopic column (8) contacts the machine cover (2); and the other end is fixedly connected to a fixing plate (801) having a diameter larger than that of the telescopic column (8); a spring is provided between the end of the telescopic column (8) facing the machine cover (2) and the fixed plate (7); a scraper (603) cooperating with the fixing plate (801) is fixedly connected to the edge of the arc-shaped platform (602); the scraper (603) is used to make the telescopic column (8) slide in the direction of the rotating plate (6) and compress the spring when the rotating plate (6) rotates.

3. The propeller anemometer according to claim 2, characterized in that: The head end of the scraper (603) is closer to the cover (2) than the tail end of the scraper (603) along the axial direction of the telescopic column (8), and a through hole for the hollow column (601) to pass through is provided at the center of the fixed plate (7), and the hollow column (601) is rotatably connected relative to the fixed plate (7).

4. The propeller anemometer according to claim 1, characterized in that: The edge of the machine cover (2) is fixedly connected to a shielding ring (9) for shielding the gap between the machine body (1) and the machine cover (2) in a direction facing the machine body (1); the edge of the end of the machine body (1) is fixedly connected to a water blocking platform (10) within the shielding range of the shielding ring (9); and the water blocking platform (10) is inclined in a direction away from the machine cover (2).

5. The propeller anemometer according to claim 4, characterized in that: A heating ring (11) is fixedly connected to the water blocking platform (10), and the heating ring (11) is also within the shielding range of the shielding ring (9).

6. The propeller anemometer according to claim 1, characterized in that: A driving motor for driving the body shaft (3) to rotate is installed in the body (1), and the tail end of the body (1) is rotatably connected to a lower tail wing (12).

7. The propeller anemometer according to claim 6, characterized in that: The bottom surface of the body (1) is provided with a tail wing groove (102) for clamping the lower tail wing (12), and a magnetic attraction structure for fixing the end of the lower tail wing (12) is provided in the tail wing groove (102).

8. The propeller anemometer according to claim 1, characterized in that: The hollow column (601) is coaxial with the cover shaft (5), and has an inner diameter greater than the diameter of the cover shaft (5); when the cover (2) rotates in dynamic balance, the cover shaft (5) does not contact the hollow column (601).

9. The propeller anemometer according to claim 8, characterized in that: The outer wall of the cover shaft (5) and the inner wall of the end of the hollow column (601) are both provided with mutually matching anti-slip structures.

10. The propeller anemometer according to claim 1, characterized in that: The inner diameter of the hollow column (601) is larger than the body shaft (3), the flexible coupling body (4), and the cover shaft (5), and the diameter of the flexible coupling body (4) is smaller than the body shaft (3) and the cover shaft (5).

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