JP2012137079A - Impeller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To satisfy both impeller's low rotating speed and large wind amount or low wind speed and impeller's large torque.SOLUTION: There is provided an opening face 10a of approximately U shape on a face approximately orthogonal in the rotating direction of the impeller 1 to be so structured that the cross-sectional area may be smaller toward the reverse direction in relation to the rotating direction of the impeller 1 from the opening face 10a of an airflow import 4a. The airflow export 6a is an approximately isosceles triangle. The bottom 11 of the approximately isosceles triangle is structured to be in the rotating direction of the impeller 1. This makes the impeller generate less noise so that more wind amount can be gained by the low rotating speed of the impeller.

Description

  The present invention relates to an impeller for air blowing or an impeller for power generation, and relates to an impeller capable of generating power even at a low rotational speed and a large air volume even at a low rotational speed.

  In recent years, there has been a demand for an impeller capable of generating power even with low noise and low wind speed.

  For example, in Japanese Unexamined Patent Publication No. 2000-186893, in an impeller motor having an air intake port in the axial direction, a blade having a height larger than the thickness of the rotor is implanted on the outer peripheral surface of the rotor attached to the shaft. The air is sucked from the upper surface of the blade, and the air is also sucked from the upper side surface of the blade implantation portion via the rotor upper surface. According to this configuration, by reducing the thickness of the rotor, the air intake area of the blades can be increased, and the air volume can be increased.

JP 2000-186893 A

  However, such a structure has a problem in that the size of the impeller in the direction of the rotation axis increases because the size of the blade in the direction of sucking air increases. The same problem occurs when applied to an impeller for power generation.

  The present invention solves such a conventional problem, and even for a blower impeller with a large air volume, the size of the impeller in the direction of the rotation axis is small, low cost, low noise, low air flow performance and high air volume performance. An object of the present invention is to provide an impeller and a power generation impeller capable of generating a large rotational force even at a low wind speed.

  In order to solve the above problems, the present invention provides a plurality of air inflow portions provided on one surface of a separation surface substantially orthogonal to the rotation center axis, and an air inflow portion provided on the other surface of the separation surface. A plurality of communicating air outflow portions.

  In the present invention, the air inflow portion is provided with an opening surface such as a substantially U shape or a substantially semicircular shape on a surface substantially orthogonal to the rotation direction of the impeller, and the rotation direction of the impeller from the opening surface of the air inflow portion. The cross-sectional area becomes smaller as it goes in the opposite direction, and the air outflow portion has an approximately isosceles triangle shape, and the base of the approximately isosceles triangle shape is in the rotational direction of the impeller. .

  Further, the present invention is configured such that the air inflow portion has a substantially isosceles triangle shape, and the bottom of the substantially isosceles triangle shape is opposite to the rotation direction of the impeller, and the air outflow portion is the rotation of the impeller. An opening surface such as a substantially U shape or a substantially semicircular shape is provided on a surface substantially orthogonal to the direction, and the cross-sectional area is configured to decrease from the opening surface of the air outflow portion toward the rotation direction of the impeller. Yes.

  Further, the present invention is configured such that the air inflow portions adjacent to each other in the circumferential direction of the impeller are located at a position that is different from the radial direction by approximately a half pitch.

  Further, according to the present invention, the air inflow portion of the separation surface is surrounded by two substantially straight lines opposed to two opposed arcs, and the air inflow portion becomes smaller in cross section as it goes in the rotation direction of the impeller. The opening surface of the air outflow portion on the surface substantially orthogonal to the rotation direction of the impeller is configured in a substantially U shape or a substantially semicircular shape.

  Further, according to the present invention, the opening surface of the air inflow portion on the surface substantially orthogonal to the rotation direction of the impeller is configured to have a substantially U shape or a substantially semicircular shape, and the air outflow portions of the separation surface are opposed to two substantially opposite surfaces. In the shape surrounded by two substantially straight lines opposed to the arc, the air outflow portion is configured so that its cross-sectional area increases as it goes in the rotational direction of the impeller.

  Moreover, the present invention is configured such that the number of air inflow portions adjacent to each other in the radial direction of the impeller decreases as it goes toward the rotation center axis.

  Among the inventions according to the present application, the inventions according to claim 1, claim 2 and claim 6 are such that the air flowing in from the opening surfaces of the plurality of air inflow portions is bent at the air inflow portions. And flows out from a plurality of air outflow portions. Since the area of the opening surfaces of the plurality of air inflow portions is large and many, a large amount of air can be discharged from the plurality of air outflow portions even when the rotational speed of the impeller is low. That is, the air volume from a plurality of air outflow portions can be increased. Moreover, since the rotational speed of an impeller can be made low, the noise of an impeller can be made small.

  Further, among the inventions according to the present application, the inventions according to claim 1, claim 3 and claim 5 are such that the air flowing in from the opening surfaces of the plurality of air inflow portions is the air inflow portion and the direction of air flow. Is bent and flows out from the plurality of air outflow portions, so that the impeller rotates. Since the area of the opening surface of the air inflow portion is large and many, a large amount of air can be discharged from a plurality of air outflow portions even when the wind speed is low. That is, the air volume from a plurality of air outflow portions can be increased. Further, since the impeller can be rotated even at a low wind speed, a drive circuit for driving the generator as an electric motor can be omitted.

  In addition, among the inventions according to the present application, when the inventions according to claims 4 and 7 are applied to an impeller for blowing air, air easily flows from the opening surfaces of the plurality of air inflow portions. The air volume from the air outflow part can be increased. Moreover, since the rotational speed of an impeller can be made low, the noise of an impeller can be made small. When applied to an impeller for wind power generation, air easily flows out from the opening surfaces of the plurality of air outflow portions, so that the air volume from the plurality of air outflow portions can be increased. Further, since the impeller can be rotated even at a low wind speed, a drive circuit for driving the generator as an electric motor can be omitted.

It is a front view of the impeller which concerns on 1st Embodiment. It is a fragmentary sectional side view of the impeller which concerns on 1st Embodiment of AA arrow. It is a partial section top view of arrow B of an impeller concerning a 1st embodiment. It is a reverse view of the impeller which concerns on 1st Embodiment. It is a front view of the impeller which concerns on 2nd Embodiment. It is a fragmentary sectional side view of the impeller which concerns on 2nd Embodiment of AA arrow. It is the fragmentary top view developed in the shape of a BB arrow line of the impeller concerning a 2nd embodiment.

  Embodiments of the present invention will be described below.

(First embodiment)
1st Embodiment of this invention is described based on FIGS. 1-4 as an axial-flow impeller for ventilation here. As shown in FIGS. 1 to 4, the impeller 1 includes a large number of air inflow portions 4 a through which air 3 flows into one surface 2 and a large number of air outflow portions 6 a through which air flows out to the other surface 5. Yes. When the impeller 1 rotates counterclockwise about the rotation shaft 7, the flow of the air 3 flows as shown by a thick arrow. In the following description, one surface 2 into which air 3 flows is referred to as “inflow surface 2a”, and the other surface 5 from which air 3 flows out is referred to as “outflow surface 5a”.

  A separation surface 8 that separates the inflow surface 2 a and the outflow surface 5 a is fixed to the rotary shaft 7 by a cylinder 9 provided on the separation surface 8. The cross-sectional shape of the air inflow portion 4a provided on the separation surface 8 and substantially orthogonal to the rotation direction of the impeller 1 is substantially U-shaped, and has an opening surface 10a through which air 3 flows, and the rotation of the impeller 1 from the opening surface 10a. The cross-sectional area decreases in the direction opposite to the direction. As shown in FIG. 4, the shape of the air outflow portion 6 a provided on the separation surface 8 is substantially isosceles triangle, and the base 11 of the isosceles triangle is provided in the rotation direction of the impeller 1.

  As shown in FIGS. 1 and 2, the plurality of air inflow portions 4a and the air outflow portions 6a communicating with the air inflow portions 4a are arranged with a half pitch shift in the radial direction. The numbers in the radial direction of the portion 4a and the air outflow portion 6a are different. The reason is that the air inflow portion 4a arranged in front of the rotation direction of the impeller 1 does not disturb the inflow of the air 3 to the air inflow portion 4a arranged after the rotation direction of the impeller 1 as much as possible. It is to do.

  The air 3 flowing in from the opening surfaces 10a of the plurality of air inflow portions 4a of the inflow surface 2a is bent in the flow direction of the air 3 by the wall surface 12a around the air inflow portion 4a, and the plurality of air outflows of the outflow surface 5a. It flows out from the part 6a. Since the area of the opening surface 10a of the plurality of air inflow portions 4a is large and many, even when the rotational speed of the impeller 1 is low, a large amount of air 3 (air volume) can flow out from the outflow surface 5a. . Since the rotational speed of the impeller 1 can be lowered, the noise of the impeller 1 can also be reduced.

  In the illustrated example, the number of the air outflow portions 6a paired with the plurality of air inflow portions 4a is different in the radial direction, but in the impeller 1 having a small radius, the plurality of air inflow portions 4a and the air outflow portions 6a are different. The number in the radial direction may be one. The number, shape, and arrangement of the air outflow portions 6a paired with the plurality of air inflow portions 4a may be changed according to the required specifications of the impeller 1. For example, the cross-sectional shape of the air inflow portion 4a may be a substantially semicircle or an intermediate shape between a substantially U shape and a substantially semicircle.

  Although the above has been described as the axial flow impeller for blowing air, if the air inflow portion 4a is changed to the air outflow portion 6a and the air outflow portion 6a is changed to the air inflow portion 4a, the axial flow impeller for wind power generation Can also be used.

  The effects derived from the structures described in the above embodiments are also derived from similar structures in the following other embodiments.

(Second Embodiment)
A second embodiment of the present invention will be described based on FIGS. 5 to 7 as an axial flow impeller for wind power generation. As shown in FIGS. 5 to 7, the impeller includes an air inflow portion 4 b through which a large number of air 3 flows into one surface 2 and an air outflow portion 6 b through which a large number of air 3 flows out to the other surface 5. When 1 flows from the top of the paper as shown by a thick arrow, the impeller 1 rotates counterclockwise about the rotation shaft 7. In the following description, one surface 2 into which air 3 flows is referred to as “inflow surface 2b”, and the other surface 5 from which air 3 flows out is referred to as “outflow surface 5b”. The same parts as those in the first embodiment will be described with the same reference numerals.

  A separation surface 8 that separates the inflow surface 2 b and the outflow surface 5 b is fixed to the rotary shaft 7 by a cylinder 9 provided on the separation surface 8. The air inflow portion 4 b provided on the separation surface 8 has an opening surface 10 b having a shape surrounded by two arcs 13 and 14 and two radial straight lines 15 and 16 centering on the rotation shaft 7. The shape in a direction substantially perpendicular to the surface 10 b is substantially U-shaped, and has a shape in which the cross-sectional area becomes smaller as it goes in the rotational direction of the impeller 1. As shown in FIG. 5, since the number of the plurality of air inflow portions 4b in the radial direction is the same, the area of the opening surface 10b of the plurality of air outflow portions 6b decreases in proportion to the radius. The reason for this is that the speed of the air 3 flowing out from the plurality of air outflow portions 6b (wind speed) is made the same, the air outflow portion 6b disposed after the direction of rotation of the impeller is used effectively. This is to prevent the outflow of the air 3 from the air outflow portion 6b disposed in front of the rotation direction as much as possible.

  The air 3 flowing in from the opening surfaces 10b of the plurality of air inflow portions 4b on the inflow surface 2b is bent in the air flowing direction on the wall surface 12b around the air inflow portion 4b, and the plurality of air outflow portions on the outflow surface 5b. Since it flows out from 6b in the clockwise direction, the impeller 1 rotates counterclockwise. Since the area of the opening surface 10b of the plurality of air inflow portions 4b is large and many, a large amount of air can flow out from the outflow surface 5b even when the speed of the air 3 (wind speed) is low. That is, the air volume from the outflow surface 5b can be increased. Further, since the impeller can be rotated even when the speed of the air 3 (wind speed) is low, it is not necessary to provide a drive circuit for driving the generator as an electric motor.

  In the illustrated example, the number of the air inflow portions 4b in the circumferential direction is the same, but the number of air inflow portions 4b may be reduced as the radius decreases. In the impeller 1 having a small radius, the number of the air inflow portions 4b in the radial direction may be one. The number, shape, and arrangement of the air outflow portions 6b that are paired with the plurality of air inflow portions 4b may be changed according to the required specifications of the impeller. For example, the cross-sectional shape of the air outflow 6b may be a substantially semicircle or an intermediate shape between a substantially U-shape and a substantially semicircle. The plurality of air inflow portions 4b and the air outflow portions 6b communicating with the air inflow portions 4b may be arranged with a half pitch shift in the circumferential direction. In addition, the straight lines 15 and 16 may be set to an angle at which the extended portion does not pass through the center of the rotation shaft 7.

  The above has been described as an axial flow impeller for wind power generation. However, if the air inflow portion 4b is changed to the air outflow portion 6b and the air outflow portion 6b is changed to the air inflow portion 4b, an axial flow impeller for blowing air is used. Can also be used.

  The present invention is not limited to the above-described embodiment, and includes various modifications made to the above-described embodiment without departing from the spirit of the present invention.

  The present invention can be widely used from ultra-small to medium-sized impellers without being limited to the use for air blowing or power generation.

DESCRIPTION OF SYMBOLS 1 Impeller 2 One surface 2a, 2b Inflow surface 3 Air 4a, 4b Air inflow part 5 Other surface 5a, 5b Outflow surface 6a, 6b Air outflow part 7 Rotating shaft 8 Separation surface 9 Cylinder 10a, 10b Opening surface 11 Bottom 12a, 12b Wall surface 13, 14 Arc 15, 16 Straight line

Claims (7)

  A plurality of air inflow portions provided on one surface of the separation surface substantially orthogonal to the rotation center axis, and a plurality of air outflow portions provided on the other surface of the separation surface and communicated with the air inflow portion. Impeller characterized by that.   2. The impeller according to claim 1, wherein the air inflow portion is provided with an opening surface such as a substantially U shape or a substantially semicircular shape on a surface substantially orthogonal to a rotation direction of the impeller, and the opening surface of the air inflow portion. The cross-sectional area decreases from the direction of rotation of the impeller to the direction of rotation of the impeller, and the air outflow portion has an approximately isosceles triangle shape, and the base of the approximately isosceles triangle shape is in the rotation direction of the impeller. It is comprised so that it may become, The impeller characterized by the above-mentioned.   2. The impeller according to claim 1, wherein the air inflow portion has a substantially isosceles triangle shape, and the bottom of the substantially isosceles triangle shape is opposite to the rotation direction of the impeller, the air outflow The portion is provided with an opening surface such as a substantially U shape or a substantially semicircular shape on a surface substantially orthogonal to the rotation direction of the impeller, and the cross-sectional area increases from the opening surface of the air outflow portion toward the rotation direction of the impeller. An impeller configured to be small.   4. The impeller according to claim 2, wherein the air inflow portion adjacent in the circumferential direction of the impeller is configured to be at a position that is different from the radial direction by approximately a half pitch.   2. The impeller according to claim 1, wherein the air inflow portion of the separation surface is surrounded by two substantially straight lines opposed to two opposed arcs, and the air inflow portion extends in a rotation direction of the impeller. The cross-sectional area is configured to become smaller as it goes, and the opening surface of the air outflow portion that is substantially perpendicular to the rotation direction of the impeller is configured to have a substantially U shape or a semicircular shape. Impeller.   2. The impeller according to claim 1, wherein an opening surface of the air inflow portion on a surface substantially orthogonal to a rotation direction of the impeller is configured in a substantially U shape or a substantially semicircular shape, and the air outflow of the separation surface. The portion is surrounded by two substantially straight lines opposed to each other, and the air outflow portion is configured to increase in cross-sectional area as it goes in the rotation direction of the impeller. Impeller.   The impeller according to claim 5 or 6, wherein the air inflow portion adjacent in the radial direction of the impeller is configured so that the number thereof decreases as it goes toward the rotation center axis. Impeller.

Images