Double-impeller horizontal axis wind turbine

Abstract

A double-impeller horizontal axis windmill, the impeller comprises a front impeller and a rear impeller, the front impeller and the rear impeller are respectively composed of a pair of square blades, the edge of each blade close to the rotating shaft is perpendicular to the rotating shaft, the rotating shaft and the blade form a 45-degree angle, the angle between a pair of blades is 90 degrees, a pair of blades are respectively located on the oblique opposite sides of the rotating shaft, the 90-degree angle of the two blades of the front impeller faces forward, and the 90-degree angle of the two blades of the rear impeller faces backward; the two ends of the rotating shaft are supported on a U-shaped support through bearing seats, the tail wing of a vertical plate is fixed to the rear end of the support, and the bottom surface of the support is provided with a support for the rotating shaft. The square blade of the utility model forms a 45-degree angle with the horizontal rotating shaft of the windmill, the wind energy utilization rate is high, the power generated by the double-impeller is larger than that of the traditional single-impeller, the square blade has small centrifugal force, and the windmill is not easy to be damaged, when the windmill is used for generating electricity, the power generation equipment is arranged at the bottom of the windmill frame, and the installation and maintenance are convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to a windmill, especially a double-impeller horizontal axis windmill. BACKGROUND

[0002] The wind energy utilization rate of the traditional horizontal axis windmill is 25%-45%, and the wind energy utilization rate is unbalanced with the wind speed, that is, the utilization rate is small when the wind speed is small and the utilization rate is large when the wind speed is large; the blades of the traditional windmill are generally long strip-shaped, and the centrifugal force generated during rotation is large, which easily causes the windmill to be damaged; and the speed change and power generation equipment can only be installed at the position of the central rotating shaft of the windmill, which brings inconvenience to installation and maintenance. SUMMARY

[0003] The utility model aims at providing a double-impeller horizontal axis windmill, solving the defects of the prior art, and having high wind energy utilization rate and small centrifugal force.

[0004] The utility model discloses a double-impeller horizontal axis windmill, which comprises a rotating shaft and an impeller, the impeller is fixed on the horizontally arranged rotating shaft, the impeller comprises front and rear impellers arranged alternately, the front and rear impellers are respectively composed of a pair of blades, each blade is square, the edge of each blade close to the rotating shaft is perpendicular to the axis direction of the rotating shaft, the blades and the rotating shaft form a 45-degree angle, so that the angle between the pair of blades is 90 degrees, the pair of blades are located on the opposite sides of the rotating shaft and are close to each other at an angle, the 90-degree angle of the two blades of the front impeller faces forward, and the 90-degree angle of the two blades of the rear impeller faces backward; the two ends of the rotating shaft are supported on a U-shaped support through bearing seats, the tail wing of a vertical plate is fixed to the rear end of the support, and a support rotating shaft for cooperating with a vertical sleeve of a base is arranged at the middle position of the bottom surface of the support.

[0005] The blades are arranged on the blade holder.

[0006] The periphery of the blade is provided with a frame, the inner end of the edge of the frame on the same surface as the rotating shaft is fixed to the rotating shaft, the outer end of the edge is connected with a connecting rod between the frame and the rotating shaft, the edge of the frame, the rotating shaft and the connecting rod form a triangle, and a reinforcing rib is connected between the connecting rod and the other edges of the frame.

[0007] The connecting rod is perpendicular to the rotating shaft, the edge of the frame on the same surface as the rotating shaft, the rotating shaft and the connecting rod form an isosceles right triangle; an inward horizontal rib and a vertical rib are correspondingly arranged on the other two free ends of the frame, the end points of the horizontal rib and the vertical rib are fixed together and form an isosceles right triangle with the free edge of the frame, and a connecting rib is connected between the top points of the two isosceles right triangles; the connecting rod, the rotating shaft, the horizontal rib, the vertical rib, the connecting rib and the frame form a right triangular prism blade holder.

[0008] A transmission wheel is fixed at the middle position of the rotating shaft, a generator is fixed on the top surface of the bottom edge of the support, and a transmission belt is connected between the transmission wheel and the generator to form a wind-driven generator.

[0009] The utility model discloses the beneficial effect is: the square blade of windmill and windmill horizontal pivot are 45 degrees angle, the angle of air fluid into and out of the blade is 45 degrees, and the wind energy utilization rate is not influenced to its wind speed height, and the wind energy utilization rate is high, adopt the form of double vane, and the power generated is more than one times of traditional horizontal axis windmill, square blade, the centrifugal force produced when rotating than the long strip of wind blade of same area is small, and the windmill is not easy to damage, windmill power is used for power generation, and the power of pivot is passed transmission belt and is transmitted to the bottom of windmill frame, and the power generation equipment is also installed in the bottom of windmill frame, and it is convenient to install and maintain. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the front view of the utility model;

[0011] Figure 2 It is the perspective view of the utility model;

[0012] Figure 3 It is the layout diagram between front vane, rear vane and pivot;

[0013] Figure 4 It is the position relation diagram of blade relative pivot;

[0014] Figure 5 It is the structure reference diagram of the utility model.

[0015] In the drawing: 1. front vane;2. rear vane;3. pivot;4. bearing seat;5. support;6. tail wing;7. support pivot;8. blade holder;9. transmission wheel;10. transmission belt;11. generator;12- blade. DETAILED DESCRIPTION

[0016] Refer to Figures 1-5The application relates to a double-impeller horizontal-axis windmill, which comprises a rotating shaft 3 and impellers, the impellers being fixed on the horizontally-arranged rotating shaft 3, the impellers comprising front impellers 1 and rear impellers 2 arranged alternately, the front impellers 1 and the rear impellers 2 each being composed of a pair of blades 12, each blade 12 being square, the edge of each blade 12 close to the rotating shaft 3 being perpendicular to the rotating shaft 3, the blade 12 and the rotating shaft 3 being at an angle of 45 degrees, so that the angle between the pair of blades 12 is 90 degrees, the pair of blades 12 being arranged on the opposite sides of the rotating shaft 3 at an angle, the 90-degree angle between the two blades 12 of the front impeller 1 being forward, the 90-degree angle between the two blades 12 of the rear impeller 2 being backward, and the rear impeller 2 being circumferentially staggered by 90 degrees relative to the front impeller 1; the two ends of the rotating shaft 3 are supported on a U-shaped support 5 through bearing seats 4, the rear end of the support 5 is fixed with a vertical tail wing 6, and the bottom surface of the support 5 is provided with a supporting rotating shaft 7 used for cooperating with a vertical sleeve of a base; a blade holder 8 is fixed on the rotating shaft 3, and the blade 12 is arranged on the blade holder 5; the blade 12 is provided with a frame, the inner end of the same side of the frame and the rotating shaft 3 is fixed, the outer end and the rotating shaft 3 are connected with a connecting rod, the same side of the frame, the rotating shaft 3 and the connecting rod form a triangle, the connecting rod and the other sides of the frame are connected with reinforcing ribs; the connecting rod is perpendicular to the rotating shaft 3, the same side of the frame, the rotating shaft 3 and the connecting rod form an isosceles right triangle; the other two free ends of the frame are correspondingly provided with inward horizontal ribs and vertical ribs, the end points of the horizontal ribs and the vertical ribs are fixed together and form an isosceles right triangle with the free side of the frame, and the connecting ribs are connected between the top points of the two isosceles right triangles; the connecting rod, the rotating shaft 3, the horizontal ribs, the vertical ribs, the connecting ribs and the frame form a right triangular prism blade holder 8.

[0017] A transmission wheel 9 is fixed on the middle part of the rotating shaft 3, a generator 11 is fixed on the top of the bottom edge of the support 5, a transmission belt 10 is connected between the transmission wheel 9 and the generator 11, and the wind power generator is formed.

Claims

1. A dual-impeller horizontal-axis wind turbine, comprising a rotating shaft and impellers, wherein the impellers are fixed on a horizontally arranged rotating shaft, characterized in that: The impeller includes a front impeller (1) and a rear impeller (2) arranged alternately. The front impeller (1) and the rear impeller (2) are each composed of a pair of blades (12). Each blade (12) is square. The side of each blade (12) close to the shaft (3) is perpendicular to the shaft (3) axis. The blade (12) and the shaft (3) form a 45-degree angle, so that the angle between the pair of blades (12) is 90 degrees. The pair of blades (12) are located on opposite sides of the shaft (3) and are close to each other at one angle. The 90-degree angle between the two blades (12) of the front impeller (1) is forward, and the 90-degree angle between the two blades (12) of the rear impeller (2) is backward. The two ends of the shaft (3) are supported on the U-shaped bracket (5) by bearing seats (4). The rear end of the bracket (5) is fixed with the tail fin (6) of the vertical plate. The bottom surface of the bracket (5) is provided with a support shaft (7) for cooperating with the vertical sleeve of the base.

2. The double-impeller horizontal shaft wind turbine according to claim 1, characterized in that: The blade holder (8) is fixed on the rotating shaft (3), and the blade (12) is set on the blade holder (8).

3. The double-impeller horizontal shaft wind turbine according to claim 2, characterized in that: The blade (12) is surrounded by a frame. The inner end of the frame and the rotating shaft (3) are fixed to the rotating shaft (3) on the same side, and the outer end is connected to the rotating shaft (3) by a connecting rod to form a triangle. The connecting rod is connected to the other sides of the frame by reinforcing ribs.

4. The double-impeller horizontal shaft wind turbine according to claim 3, characterized in that: The connecting rod is perpendicular to the pivot (3). The side of the frame and the pivot (3) are on the same plane. The pivot (3) and the connecting rod form an isosceles right triangle. The other two free ends of the frame are provided with inward horizontal and vertical ribs. The endpoints of the horizontal and vertical ribs are fixed together and form an isosceles right triangle with the free side of the frame. The vertices of the two isosceles right triangles are connected by connecting ribs. The connecting rod, pivot (3), horizontal ribs, vertical ribs, connecting ribs and frame form a right triangular blade frame (8).

5. The double-impeller horizontal shaft wind turbine according to claim 1, characterized in that: A drive wheel (9) is fixed in the middle of the shaft (3), and a generator (11) is fixed on the bottom edge of the support (5). A drive belt (10) is connected between the drive wheel (9) and the generator (11) to form a wind turbine generator.

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