CN203230520U - Multi-blade water turbine - Google Patents

Abstract

A multi-blade water turbine comprises at least two annular turbine discs, a central shaft, spokes and multiple blades. The central shaft is disposed at the center of the annular turbine discs. The axis direction of the central shaft is perpendicular to the radial direction of each annular turbine disc. The spokes arranged along the radial direction of each annular turbine disc are disposed between the central shaft and each annular turbine disc. 17-27 blades are disposed on the annular turbine discs in a surrounded manner. Under a certain working condition, efficiency of the water turbine is in direct proportion to the number of the blades, and increasing of blade number can increase work efficiency greatly. Use data shows that efficiency of a power generating set using the water turbine is 1.4-1.5 times of that of the traditional vertical shaft power generating set. Self-buoyancy of a hollow spindle is utilized to reduce frictional force between the water turbine and a bearing, and work efficiency is increased effectively. The multi-blade water turbine suitable for reciprocating water flows has a self-starting function under various flow speed.

Description

multi-blade water turbine

technical field

The utility model relates to a multi-blade water turbine.

Background technique

The tidal current turbines in the prior art are mainly based on the technology of wind power generation, and are divided into two types: one is the impeller of the horizontal axis turbine with three blades or two blades, which generally does not have a huge shroud, but the efficiency is generally low; One is the wind power impeller with a vertical axis. The number of blades of the turbine impeller is basically three to five blades, and there are also turbine impellers with more than ten blades. It is basically a traditional double-click impeller, and its efficiency is higher than that of a three-blade turbine with a horizontal axis. The impeller is slightly taller, but that adds to the bulky shroud.

Today's energy is increasingly scarce, the greenhouse effect is becoming more and more serious, and energy must be low-carbon, so clean energy such as wind energy, ocean energy (including tidal energy, tidal current energy, wave energy, and ocean current energy) is the development direction of future energy. But now these clean energy power generation equipment, in addition to the relatively mature utilization of wind energy, the utilization of ocean energy is still in its infancy, there is no general and mature equipment, the equipment cannot be scaled up, the efficiency is low, and it is still not fully satisfactory s level.

Utility model content

The utility model provides a high-efficiency multi-blade water turbine aiming at the deficiencies of the prior art.

In order to achieve the above object, the utility model can adopt the following technical solutions: a multi-blade water turbine includes at least two annular discs, a central shaft, spokes and a plurality of blades; the central shaft is arranged at the center of the annular disc, so The axial direction of the central shaft is perpendicular to the radial direction of the annular wheel; the spokes are arranged between the annular wheel and the central shaft, and the spokes are arranged along the radial direction of the annular wheel; a plurality of blades are arranged around On the ring disc; the number of blades is 17-27 pieces; the blades are arc-shaped, and the sum of the arc lengths of all blades is between 0.85-2 times the outer diameter of the ring disc, from the midpoint of the blade to the two endpoints The included angle of the line segment constitutes the included angle of the blade, and the included angle of the blade is between 100-170 degrees; the included angle between the maximum chord line of the blade and the radius line of the annular wheel passing through the outer end point of the blade is the blade installation angle, and the blade installation angle is The angle is between 10-35 degrees.

Preferably, the central shaft is a hollow shaft.

Preferably, the water turbine further includes two cover plates, and the two cover plates are respectively arranged on the side of the two annular discs facing away from the blades.

The beneficial effect of the utility model is that: under certain working conditions, the efficiency of the impeller water turbine is directly proportional to the number of blades, and the increase in the number of blades greatly improves the working efficiency. Practical data show that the efficiency of the power generation device using the impeller-turbine is 1.4-1.5 times that of the traditional vertical axis power generation device; in addition, the use of the buoyancy of the hollow main shaft reduces the friction between the impeller-turbine and the bearing, effectively improving the work efficiency; suitable for reciprocating Water flow with self-starting capability at various flow rates.

Description of drawings

Fig. 1 is the front view of the impeller water turbine of the present invention.

Fig. 2 is a top view of the impeller water turbine of the present invention.

Fig. 3 is a schematic diagram of the blade included angle structure of the present invention.

Fig. 4 is a structural schematic diagram of the blade installation angle of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the utility model. Obviously, the described The embodiments are only some of the embodiments of the present utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

Embodiments of the present utility model are described below with reference to the accompanying drawings. A water turbine includes a central shaft 1 and an annular wheel 2, the central shaft 1 is installed in the center of the annular wheel, the axial direction of the central shaft is perpendicular to the radial direction of the annular wheel, the distance between the annular wheel 2 and the central shaft 1 Spokes 3 are installed between them, and the spokes 3 are set along the radial direction of the annular wheel; multiple blades 4 are fixedly installed on the annular wheel, and the blades are parallel to the central axis. If the blades of the water turbine are longer, they can be arranged along the The axial direction of the hollow shaft is evenly distributed with a plurality of annular discs 3, and a plurality of blades 4 are arranged around the annular discs 3, that is, the longer blades are divided into shorter ones and connected into a whole through a plurality of annular discs 3, This can increase the firmness; the number of blades is 17-27, and the preferred number of blades can be 18. The blades are arc-shaped, and the sum of the arc lengths of all blades is between 0.85-2 times the circumference of the outer diameter of the annular wheel. The angle A of the blade is the angle formed by the line segment from the midpoint of the blade to the two end points (as shown in Figure 3), the angle A of the blade is greater than or equal to 100 degrees and less than or equal to 170 degrees, and the angle B of the blade installation angle is the chord of the blade The included angle between the line and the outer diameter of the annular disc passing through the outer end of the blade (as shown in Figure 4), where the blade installation angle is greater than or equal to 10 degrees and less than or equal to 35 degrees.

Under certain working conditions, the efficiency of the impeller turbine is directly proportional to the number of blades, which greatly improves the efficiency. Practical data show that the efficiency of the power generation device using the impeller-turbine is 1.4-1.5 times that of the traditional vertical axis power generation device; in addition, the use of the buoyancy of the hollow main shaft reduces the friction between the impeller-turbine and the bearing, effectively improving the work efficiency; suitable for reciprocating Water flow with self-starting capability at various flow rates.

In this embodiment, the water turbine further includes two cover plates 5 , and the two cover plates 5 are respectively arranged on the sides of the two annular wheels 2 facing away from the blades 4 . As shown in FIG. 1 , the cover plates 5 are respectively located above the upper annular wheel 2 and below the lower annular wheel 2 . By setting the cover plate 5, water flow can be effectively prevented from entering from the gap between the central shaft 1 and the ring disc 2 from above and below, so as to ensure the working efficiency of the water turbine.

Claims (3)

1. the multiple-blade water turbine is characterized in that, comprising:

At least two annular wheel discs;

Central shaft is arranged at the center of described annular wheel disc, and the axial direction of described central shaft is perpendicular to the radial direction of described annular wheel disc;

Spoke is arranged between annular wheel disc and the central shaft, and described spoke is along the radial direction setting of annular wheel disc;

A plurality of blades are around being located on the annular wheel disc; Blade quantity is the 17-27 sheet; Described blade is arc, the summation of all blade arc length be annular wheel disc external diameter circumference 0.85-2 doubly between, the line segment angle of blade mid point to two end points constitutes leaf angle, described leaf angle is between the 100-170 degree; The maximum chord length line of blade is blade angle with the angle of the annular wheel disc radius of crossing the outer end points of blade, and described blade angle is between the 10-35 degree.

2. multiple-blade water turbine according to claim 1, it is characterized in that: described central shaft is hollow shaft.

3. multiple-blade water turbine according to claim 1, it is characterized in that: also comprise two cover plates, described two cover plates are arranged at described two annular wheel discs respectively back to a side of described blade.

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